shithub: fork

Info  •  Files  •  Log  •  Branches

add jam, jamterm

diff: cannot open b/sys/src/cmd/jam//null: file does not exist: 'b/sys/src/cmd/jam//null' diff: cannot open b/sys/src/cmd/jamterm//null: file does not exist: 'b/sys/src/cmd/jamterm//null'

--- /dev/null

+++ b/sys/src/cmd/jam/acid.lib

@@ -1,0 +1,104 @@

+defn saminit()

+{

+	if !access("/sys/src/cmd/sam/cmd.acid") then

+		rc("cd /sys/src/cmd/sam && mk cmd.acid");

+	include("/sys/src/cmd/sam/cmd.acid");

+}

+

+defn printrunestring(addr, len)

+{

+	loop 1,len do {

+		print(*(addr\r));

+		addr = addr+2;

+	}

+}

+

+defn runestring(addr, len)

+{

+	local s;

+	

+	s = "";

+	loop 1,len do {

+		s = s + *(addr\r);

+		addr = addr+2;

+	}

+	return s;

+}

+

+defn string(s)

+{

+	complex String s;

+	return runestring(s.s, s.n);

+}

+

+defn filemenu(f)

+{

+	complex File f;

+	local s;

+	

+	s = "";

+	if f != *cmd then {

+		if f.mod then

+			s = s + "'";

+		else 

+			s = s + " ";

+		if f.rasp != 0 then

+			s = s + "+";

+		else

+			s = s + "-";

+		if f == *curfile then

+			s = s + ".";

+		else

+			s = s + " ";

+		s = s + " ";

+	}

+	s = s + string(f.name);

+	print("file(", f\X, ") // ", s, "\n");

+}

+

+defn files()

+{

+	local i, f, fx, fp;

+	

+	fx = (List)file;

+	if fx.nused == 0 then

+		filemenu(*cmd);

+	i = 0;

+	loop 1,fx.nused do {

+		f = (File)fx.g.filep[i];

+		filemenu(f);

+		i = i+1;

+	}

+}

+

+defn range(r)

+{

+	complex Range r;

+	

+	if r.p1 == r.p2 then

+		return itoa(r.p1, "#%d");

+	return itoa(r.p1, "#%d")+"-"+itoa(r.p2, "#%d");

+}

+

+defn file(f)

+{

+	complex File f;

+	

+	filemenu(f);

+	print("\t$=#", f.nc\D, " .=", range(f.dot.r), " buffer(", f\X, ")\n");

+	if f == *cmd then {

+		print("\tcmdpt=#", *cmdpt\D, " cmdptadv=#", *cmdptadv\D, "\n");

+	}

+}

+

+defn buffer(b)

+{

+	complex Buffer b;

+	

+	print("buffer(", b\X, "): c=", b.c\X, " nc=", b.nc\D, "\n");

+	print("cache: ==(");

+	print(runestring(b.c, b.nc));

+	print(")==\n");

+}

+

+print("/sys/lib/acid/sam");

--- /dev/null

+++ b/sys/src/cmd/jam/address.c

@@ -1,0 +1,243 @@

+#include "sam.h"

+#include "parse.h"

+

+Address	addr;

+String	lastpat;

+int	patset;

+File	*menu;

+

+File	*matchfile(String*);

+Address	charaddr(Posn, Address, int);

+

+Address

+address(Addr *ap, Address a, int sign)

+{

+	File *f = a.f;

+	Address a1, a2;

+

+	do{

+		switch(ap->type){

+		case 'l':

+		case '#':

+			a = (*(ap->type=='#'?charaddr:lineaddr))(ap->num, a, sign);

+			break;

+

+		case '.':

+			a = f->dot;

+			break;

+

+		case '$':

+			a.r.p1 = a.r.p2 = f->nc;

+			break;

+

+		case '\'':

+			a.r = f->mark;

+			break;

+

+		case '?':

+			sign = -sign;

+			if(sign == 0)

+				sign = -1;

+			/* fall through */

+		case '/':

+			nextmatch(f, ap->are, sign>=0? a.r.p2 : a.r.p1, sign);

+			a.r = sel.p[0];

+			break;

+

+		case '"':

+			a = matchfile(ap->are)->dot;

+			f = a.f;

+			if(f->unread)

+				load(f);

+			break;

+

+		case '*':

+			a.r.p1 = 0, a.r.p2 = f->nc;

+			return a;

+

+		case ',':

+		case ';':

+			if(ap->left)

+				a1 = address(ap->left, a, 0);

+			else

+				a1.f = a.f, a1.r.p1 = a1.r.p2 = 0;

+			if(ap->type == ';'){

+				f = a1.f;

+				a = a1;

+				f->dot = a1;

+			}

+			if(ap->next)

+				a2 = address(ap->next, a, 0);

+			else

+				a2.f = a.f, a2.r.p1 = a2.r.p2 = f->nc;

+			if(a1.f != a2.f)

+				error(Eorder);

+			a.f = a1.f, a.r.p1 = a1.r.p1, a.r.p2 = a2.r.p2;

+			if(a.r.p2 < a.r.p1)

+				error(Eorder);

+			return a;

+

+		case '+':

+		case '-':

+			sign = 1;

+			if(ap->type == '-')

+				sign = -1;

+			if(ap->next==0 || ap->next->type=='+' || ap->next->type=='-')

+				a = lineaddr(1L, a, sign);

+			break;

+		default:

+			panic("address");

+			return a;

+		}

+	}while(ap = ap->next);	/* assign = */

+	return a;

+}

+

+void

+nextmatch(File *f, String *r, Posn p, int sign)

+{

+	compile(r);

+	if(sign >= 0){

+		if(!execute(f, p, INFINITY))

+			error(Esearch);

+		if(sel.p[0].p1==sel.p[0].p2 && sel.p[0].p1==p){

+			if(++p>f->nc)

+				p = 0;

+			if(!execute(f, p, INFINITY))

+				panic("address");

+		}

+	}else{

+		if(!bexecute(f, p))

+			error(Esearch);

+		if(sel.p[0].p1==sel.p[0].p2 && sel.p[0].p2==p){

+			if(--p<0)

+				p = f->nc;

+			if(!bexecute(f, p))

+				panic("address");

+		}

+	}

+}

+

+File *

+matchfile(String *r)

+{

+	File *f;

+	File *match = 0;

+	int i;

+

+	for(i = 0; i<file.nused; i++){

+		f = file.filepptr[i];

+		if(f == cmd)

+			continue;

+		if(filematch(f, r)){

+			if(match)

+				error(Emanyfiles);

+			match = f;

+		}

+	}

+	if(!match)

+		error(Efsearch);

+	return match;

+}

+

+int

+filematch(File *f, String *r)

+{

+	char *c, *s;

+	String *t;

+

+	c = Strtoc(&f->name);

+	s = smprint("%c%c%c %s\n", " '"[f->mod],

+		"-+"[f->rasp!=0], " ."[f==curfile], c);

+	if(s == nil)

+		error(Etoolong);

+	free(c);

+	t = tmpcstr(s);

+	Strduplstr(&genstr, t);

+	freetmpstr(t);

+	/* A little dirty... */

+	if(menu == 0)

+		menu = fileopen();

+	bufreset(menu);

+	bufinsert(menu, 0, genstr.s, genstr.n);

+	compile(r);

+	free(s);

+	return execute(menu, 0, menu->nc);

+}

+

+Address

+charaddr(Posn l, Address addr, int sign)

+{

+	if(sign == 0)

+		addr.r.p1 = addr.r.p2 = l;

+	else if(sign < 0)

+		addr.r.p2 = addr.r.p1-=l;

+	else if(sign > 0)

+		addr.r.p1 = addr.r.p2+=l;

+	if(addr.r.p1<0 || addr.r.p2>addr.f->nc)

+		error(Erange);

+	return addr;

+}

+

+Address

+lineaddr(Posn l, Address addr, int sign)

+{

+	int n;

+	int c;

+	File *f = addr.f;

+	Address a;

+	Posn p;

+

+	a.f = f;

+	if(sign >= 0){

+		if(l == 0){

+			if(sign==0 || addr.r.p2==0){

+				a.r.p1 = a.r.p2 = 0;

+				return a;

+			}

+			a.r.p1 = addr.r.p2;

+			p = addr.r.p2-1;

+		}else{

+			if(sign==0 || addr.r.p2==0){

+				p = (Posn)0;

+				n = 1;

+			}else{

+				p = addr.r.p2-1;

+				n = filereadc(f, p++)=='\n';

+			}

+			while(n < l){

+				if(p >= f->nc)

+					error(Erange);

+				if(filereadc(f, p++) == '\n')

+					n++;

+			}

+			a.r.p1 = p;

+		}

+		while(p < f->nc && filereadc(f, p++)!='\n')

+			;

+		a.r.p2 = p;

+	}else{

+		p = addr.r.p1;

+		if(l == 0)

+			a.r.p2 = addr.r.p1;

+		else{

+			for(n = 0; n<l; ){	/* always runs once */

+				if(p == 0){

+					if(++n != l)

+						error(Erange);

+				}else{

+					c = filereadc(f, p-1);

+					if(c != '\n' || ++n != l)

+						p--;

+				}

+			}

+			a.r.p2 = p;

+			if(p > 0)

+				p--;

+		}

+		while(p > 0 && filereadc(f, p-1)!='\n')	/* lines start after a newline */

+			p--;

+		a.r.p1 = p;

+	}

+	return a;

+}

--- /dev/null

+++ b/sys/src/cmd/jam/buff.c

@@ -1,0 +1,302 @@

+#include "sam.h"

+

+enum

+{

+	Slop = 100,	/* room to grow with reallocation */

+};

+

+static

+void

+sizecache(Buffer *b, uint n)

+{

+	if(n <= b->cmax)

+		return;

+	b->cmax = n+Slop;

+	b->c = runerealloc(b->c, b->cmax);

+}

+

+static

+void

+addblock(Buffer *b, uint i, uint n)

+{

+	if(i > b->nbl)

+		panic("internal error: addblock");

+

+	b->bl = realloc(b->bl, (b->nbl+1)*sizeof b->bl[0]);

+	if(i < b->nbl)

+		memmove(b->bl+i+1, b->bl+i, (b->nbl-i)*sizeof(Block*));

+	b->bl[i] = disknewblock(disk, n);

+	b->nbl++;

+}

+

+

+static

+void

+delblock(Buffer *b, uint i)

+{

+	if(i >= b->nbl)

+		panic("internal error: delblock");

+

+	diskrelease(disk, b->bl[i]);

+	b->nbl--;

+	if(i < b->nbl)

+		memmove(b->bl+i, b->bl+i+1, (b->nbl-i)*sizeof(Block*));

+	b->bl = realloc(b->bl, b->nbl*sizeof b->bl[0]);

+}

+

+/*

+ * Move cache so b->cq <= q0 < b->cq+b->cnc.

+ * If at very end, q0 will fall on end of cache block.

+ */

+

+static

+void

+flush(Buffer *b)

+{

+	if(b->cdirty || b->cnc==0){

+		if(b->cnc == 0)

+			delblock(b, b->cbi);

+		else

+			diskwrite(disk, &b->bl[b->cbi], b->c, b->cnc);

+		b->cdirty = FALSE;

+	}

+}

+

+static

+void

+setcache(Buffer *b, uint q0)

+{

+	Block **blp, *bl;

+	uint i, q;

+

+	if(q0 > b->nc)

+		panic("internal error: setcache");

+	/*

+	 * flush and reload if q0 is not in cache.

+	 */

+	if(b->nc == 0 || (b->cq<=q0 && q0<b->cq+b->cnc))

+		return;

+	/*

+	 * if q0 is at end of file and end of cache, continue to grow this block

+	 */

+	if(q0==b->nc && q0==b->cq+b->cnc && b->cnc<=Maxblock)

+		return;

+	flush(b);

+	/* find block */

+	if(q0 < b->cq){

+		q = 0;

+		i = 0;

+	}else{

+		q = b->cq;

+		i = b->cbi;

+	}

+	blp = &b->bl[i];

+	while(q+(*blp)->n <= q0 && q+(*blp)->n < b->nc){

+		q += (*blp)->n;

+		i++;

+		blp++;

+		if(i >= b->nbl)

+			panic("block not found");

+	}

+	bl = *blp;

+	/* remember position */

+	b->cbi = i;

+	b->cq = q;

+	sizecache(b, bl->n);

+	b->cnc = bl->n;

+	/*read block*/

+	diskread(disk, bl, b->c, b->cnc);

+}

+

+void

+bufinsert(Buffer *b, uint q0, Rune *s, uint n)

+{

+	uint i, m, t, off;

+

+	if(q0 > b->nc)

+		panic("internal error: bufinsert");

+

+	while(n > 0){

+		setcache(b, q0);

+		off = q0-b->cq;

+		if(b->cnc+n <= Maxblock){

+			/* Everything fits in one block. */

+			t = b->cnc+n;

+			m = n;

+			if(b->bl == nil){	/* allocate */

+				if(b->cnc != 0)

+					panic("internal error: bufinsert1 cnc!=0");

+				addblock(b, 0, t);

+				b->cbi = 0;

+			}

+			sizecache(b, t);

+			runemove(b->c+off+m, b->c+off, b->cnc-off);

+			runemove(b->c+off, s, m);

+			b->cnc = t;

+			goto Tail;

+		}

+		/*

+		 * We must make a new block.  If q0 is at

+		 * the very beginning or end of this block,

+		 * just make a new block and fill it.

+		 */

+		if(q0==b->cq || q0==b->cq+b->cnc){

+			if(b->cdirty)

+				flush(b);

+			m = min(n, Maxblock);

+			if(b->bl == nil){	/* allocate */

+				if(b->cnc != 0)

+					panic("internal error: bufinsert2 cnc!=0");

+				i = 0;

+			}else{

+				i = b->cbi;

+				if(q0 > b->cq)

+					i++;

+			}

+			addblock(b, i, m);

+			sizecache(b, m);

+			runemove(b->c, s, m);

+			b->cq = q0;

+			b->cbi = i;

+			b->cnc = m;

+			goto Tail;

+		}

+		/*

+		 * Split the block; cut off the right side and

+		 * let go of it.

+		 */

+		m = b->cnc-off;

+		if(m > 0){

+			i = b->cbi+1;

+			addblock(b, i, m);

+			diskwrite(disk, &b->bl[i], b->c+off, m);

+			b->cnc -= m;

+		}

+		/*

+		 * Now at end of block.  Take as much input

+		 * as possible and tack it on end of block.

+		 */

+		m = min(n, Maxblock-b->cnc);

+		sizecache(b, b->cnc+m);

+		runemove(b->c+b->cnc, s, m);

+		b->cnc += m;

+  Tail:

+		b->nc += m;

+		q0 += m;

+		s += m;

+		n -= m;

+		b->cdirty = TRUE;

+	}

+}

+

+void

+bufdelete(Buffer *b, uint q0, uint q1)

+{

+	uint m, n, off;

+

+	if(!(q0<=q1 && q0<=b->nc && q1<=b->nc))

+		panic("internal error: bufdelete");

+	while(q1 > q0){

+		setcache(b, q0);

+		off = q0-b->cq;

+		if(q1 > b->cq+b->cnc)

+			n = b->cnc - off;

+		else

+			n = q1-q0;

+		m = b->cnc - (off+n);

+		if(m > 0)

+			runemove(b->c+off, b->c+off+n, m);

+		b->cnc -= n;

+		b->cdirty = TRUE;

+		q1 -= n;

+		b->nc -= n;

+	}

+}

+

+uint

+bufload(Buffer *b, uint q0, int fd, int *nulls)

+{

+	char *p;

+	Rune *r;

+	int l, m, n, nb, nr;

+	uint q1;

+

+	if(q0 > b->nc)

+		panic("internal error: bufload");

+	p = malloc((Maxblock+UTFmax+1)*sizeof p[0]);

+	if(p == nil)

+		panic("bufload: malloc failed");

+	r = runemalloc(Maxblock);

+	m = 0;

+	n = 1;

+	q1 = q0;

+	/*

+	 * At top of loop, may have m bytes left over from

+	 * last pass, possibly representing a partial rune.

+	 */

+	while(n > 0){

+		n = read(fd, p+m, Maxblock);

+		if(n < 0){

+			error(Ebufload);

+			break;

+		}

+		m += n;

+		p[m] = 0;

+		l = m;

+		if(n > 0)

+			l -= UTFmax;

+		cvttorunes(p, l, r, &nb, &nr, nulls);

+		memmove(p, p+nb, m-nb);

+		m -= nb;

+		bufinsert(b, q1, r, nr);

+		q1 += nr;

+	}

+	free(p);

+	free(r);

+	return q1-q0;

+}

+

+void

+bufread(Buffer *b, uint q0, Rune *s, uint n)

+{

+	uint m;

+

+	if(!(q0<=b->nc && q0+n<=b->nc))

+		panic("bufread: internal error");

+

+	while(n > 0){

+		setcache(b, q0);

+		m = min(n, b->cnc-(q0-b->cq));

+		runemove(s, b->c+(q0-b->cq), m);

+		q0 += m;

+		s += m;

+		n -= m;

+	}

+}

+

+void

+bufreset(Buffer *b)

+{

+	int i;

+

+	b->nc = 0;

+	b->cnc = 0;

+	b->cq = 0;

+	b->cdirty = 0;

+	b->cbi = 0;

+	/* delete backwards to avoid n² behavior */

+	for(i=b->nbl-1; --i>=0; )

+		delblock(b, i);

+}

+

+void

+bufclose(Buffer *b)

+{

+	bufreset(b);

+	free(b->c);

+	b->c = nil;

+	b->cnc = 0;

+	free(b->bl);

+	b->bl = nil;

+	b->nbl = 0;

+}

--- /dev/null

+++ b/sys/src/cmd/jam/cmd.c

@@ -1,0 +1,616 @@

+#include "sam.h"

+#include "parse.h"

+

+static char	linex[]="\n";

+static char	wordx[]=" \t\n";

+Cmdtab cmdtab[]={

+/*	cmdc	text	regexp	addr	defcmd	defaddr	count	token	 fn	*/

+	'\n',	0,	0,	0,	0,	aDot,	0,	0,	nl_cmd,

+	'a',	1,	0,	0,	0,	aDot,	0,	0,	a_cmd,

+	'b',	0,	0,	0,	0,	aNo,	0,	linex,	b_cmd,

+	'B',	0,	0,	0,	0,	aNo,	0,	linex,	b_cmd,

+	'c',	1,	0,	0,	0,	aDot,	0,	0,	c_cmd,

+	'd',	0,	0,	0,	0,	aDot,	0,	0,	d_cmd,

+	'D',	0,	0,	0,	0,	aNo,	0,	linex,	D_cmd,

+	'e',	0,	0,	0,	0,	aNo,	0,	wordx,	e_cmd,

+	'f',	0,	0,	0,	0,	aNo,	0,	wordx,	f_cmd,

+	'g',	0,	1,	0,	'p',	aDot,	0,	0,	g_cmd,

+	'i',	1,	0,	0,	0,	aDot,	0,	0,	i_cmd,

+	'k',	0,	0,	0,	0,	aDot,	0,	0,	k_cmd,

+	'm',	0,	0,	1,	0,	aDot,	0,	0,	m_cmd,

+	'M',	0,	0,	0,	0,	aNo,	0,	linex,	M_cmd,

+	'n',	0,	0,	0,	0,	aNo,	0,	0,	n_cmd,

+	'p',	0,	0,	0,	0,	aDot,	0,	0,	p_cmd,

+	'q',	0,	0,	0,	0,	aNo,	0,	0,	q_cmd,

+	'r',	0,	0,	0,	0,	aDot,	0,	wordx,	e_cmd,

+	's',	0,	1,	0,	0,	aDot,	1,	0,	s_cmd,

+	't',	0,	0,	1,	0,	aDot,	0,	0,	m_cmd,

+	'u',	0,	0,	0,	0,	aNo,	2,	0,	u_cmd,

+	'v',	0,	1,	0,	'p',	aDot,	0,	0,	g_cmd,

+	'w',	0,	0,	0,	0,	aAll,	0,	wordx,	w_cmd,

+	'x',	0,	1,	0,	'p',	aDot,	0,	0,	x_cmd,

+	'y',	0,	1,	0,	'p',	aDot,	0,	0,	x_cmd,

+	'X',	0,	1,	0,	'f',	aNo,	0,	0,	X_cmd,

+	'Y',	0,	1,	0,	'f',	aNo,	0,	0,	X_cmd,

+	'!',	0,	0,	0,	0,	aNo,	0,	linex,	plan9_cmd,

+	'>',	0,	0,	0,	0,	aDot,	0,	linex,	plan9_cmd,

+	'<',	0,	0,	0,	0,	aDot,	0,	linex,	plan9_cmd,

+	'|',	0,	0,	0,	0,	aDot,	0,	linex,	plan9_cmd,

+	'^',	0,	0,	0,	0,	aNo,	0,	linex,	plan9_cmd,

+	'_',	0,	0,	0,	0,	aDot,	0,	linex,	plan9_cmd,

+	'=',	0,	0,	0,	0,	aDot,	0,	linex,	eq_cmd,

+	'c'|0x100,0,	0,	0,	0,	aNo,	0,	wordx,	cd_cmd,

+	0,	0,	0,	0,	0,	0,	0,	0,

+};

+Cmd	*parsecmd(int);

+Addr	*compoundaddr(void);

+Addr	*simpleaddr(void);

+void	freecmd(void);

+void	okdelim(int);

+

+Rune	line[BLOCKSIZE];

+Rune	termline[BLOCKSIZE];

+Rune	*linep = line;

+Rune	*terminp = termline;

+Rune	*termoutp = termline;

+

+List	cmdlist = { 'p' };

+List	addrlist = { 'p' };

+List	relist = { 'p' };

+List	stringlist = { 'p' };

+

+int	eof;

+

+void

+resetcmd(void)

+{

+	linep = line;

+	*linep = 0;

+	terminp = termoutp = termline;

+	freecmd();

+}

+

+int

+inputc(void)

+{

+	int n, nbuf;

+	char buf[UTFmax];

+	Rune r;

+

+    Again:

+	nbuf = 0;

+	if(cmdbufpos > cmdbuf.nc && cmdbuf.nc > 0){

+		cmdbufpos = 0;

+		bufreset(&cmdbuf);

+	}

+	if(cmdbufpos < cmdbuf.nc && cmdbuf.nc > 0)

+		bufread(&cmdbuf, cmdbufpos++, &r, 1);

+	else if(downloaded){

+		while(termoutp == terminp){

+			cmdupdate();

+			if(patset)

+				tellpat();

+			while(termlocked > 0){

+				outT0(Hunlock);

+				termlocked--;

+			}

+			if(rcv() == 0)

+				return -1;

+		}

+		r = *termoutp++;

+		if(termoutp == terminp)

+			terminp = termoutp = termline;

+	}else{

+   		do{

+			n = read(0, buf+nbuf, 1);

+			if(n <= 0)

+				return -1;

+			nbuf += n;

+		}while(!fullrune(buf, nbuf));

+		chartorune(&r, buf);

+	}

+	if(r == 0){

+		warn(Wnulls);

+		goto Again;

+	}

+	return r;

+}

+

+int

+inputline(void)

+{

+	int i, c, start;

+

+	/*

+	 * Could set linep = line and i = 0 here and just

+	 * error(Etoolong) below, but this way we keep

+	 * old input buffer history around for a while.

+	 * This is useful only for debugging.

+	 */

+	i = linep - line;

+	do{

+		if((c = inputc())<=0)

+			return -1;

+		if(i == nelem(line)-1){

+			if(linep == line)

+				error(Etoolong);

+			start = linep - line;

+			runemove(line, linep, i-start);

+			i -= start;

+			linep = line;

+		}

+	}while((line[i++]=c) != '\n');

+	line[i] = 0;

+	return 1;

+}

+

+int

+getch(void)

+{

+	if(eof)

+		return -1;

+	if(*linep==0 && inputline()<0){

+		eof = TRUE;

+		return -1;

+	}

+	return *linep++;

+}

+

+int

+nextc(void)

+{

+	if(*linep == 0)

+		return -1;

+	return *linep;

+}

+

+void

+ungetch(void)

+{

+	if(--linep < line)

+		panic("ungetch");

+}

+

+Posn

+getnum(int signok)

+{

+	Posn n=0;

+	int c, sign;

+

+	sign = 1;

+	if(signok>1 && nextc()=='-'){

+		sign = -1;

+		getch();

+	}

+	if((c=nextc())<'0' || '9'<c)	/* no number defaults to 1 */

+		return sign;

+	while('0'<=(c=getch()) && c<='9')

+		n = n*10 + (c-'0');

+	ungetch();

+	return sign*n;

+}

+

+int

+skipbl(void)

+{

+	int c;

+	do

+		c = getch();

+	while(c==' ' || c=='\t');

+	if(c >= 0)

+		ungetch();

+	return c;

+}

+

+void

+termcommand(void)

+{

+	Posn p;

+

+	for(p=cmdpt; p<cmd->nc; p++){

+		if(terminp >= termline+nelem(termline)){

+			cmdpt = cmd->nc;

+			error(Etoolong);

+		}

+		*terminp++ = filereadc(cmd, p);

+	}

+	cmdpt = cmd->nc;

+}

+

+void

+cmdloop(void)

+{

+	Cmd *cmdp;

+	File *ocurfile;

+	int loaded;

+

+	for(;;){

+		if(!downloaded && curfile && curfile->unread)

+			load(curfile);

+		if((cmdp = parsecmd(0))==0){

+			if(downloaded){

+				rescue();

+				exits("eof");

+			}

+			break;

+		}

+		ocurfile = curfile;

+		loaded = curfile && !curfile->unread;

+		if(cmdexec(curfile, cmdp) == 0)

+			break;

+		freecmd();

+		cmdupdate();

+		update();

+		if(downloaded && curfile &&

+		    (ocurfile!=curfile || (!loaded && !curfile->unread)))

+			outTs(Hcurrent, curfile->tag);

+			/* don't allow type ahead on files that aren't bound */

+		if(downloaded && curfile && curfile->rasp == 0)

+			terminp = termoutp;

+	}

+}

+

+Cmd *

+newcmd(void){

+	Cmd *p;

+

+	p = emalloc(sizeof(Cmd));

+	inslist(&cmdlist, cmdlist.nused, p);

+	return p;

+}

+

+Addr*

+newaddr(void)

+{

+	Addr *p;

+

+	p = emalloc(sizeof(Addr));

+	inslist(&addrlist, addrlist.nused, p);

+	return p;

+}

+

+String*

+newre(void)

+{

+	String *p;

+

+	p = emalloc(sizeof(String));

+	inslist(&relist, relist.nused, p);

+	Strinit(p);

+	return p;

+}

+

+String*

+newstring(void)

+{

+	String *p;

+

+	p = emalloc(sizeof(String));

+	inslist(&stringlist, stringlist.nused, p);

+	Strinit(p);

+	return p;

+}

+

+void

+freecmd(void)

+{

+	int i;

+

+	while(cmdlist.nused > 0)

+		free(cmdlist.voidpptr[--cmdlist.nused]);

+	while(addrlist.nused > 0)

+		free(addrlist.voidpptr[--addrlist.nused]);

+	while(relist.nused > 0){

+		i = --relist.nused;

+		Strclose(relist.stringpptr[i]);

+		free(relist.stringpptr[i]);

+	}

+	while(stringlist.nused>0){

+		i = --stringlist.nused;

+		Strclose(stringlist.stringpptr[i]);

+		free(stringlist.stringpptr[i]);

+	}

+}

+

+int

+lookup(int c)

+{

+	int i;

+

+	for(i=0; cmdtab[i].cmdc; i++)

+		if(cmdtab[i].cmdc == c)

+			return i;

+	return -1;

+}

+

+void

+okdelim(int c)

+{

+	if(c=='\\' || ('a'<=c && c<='z')

+	|| ('A'<=c && c<='Z') || ('0'<=c && c<='9'))

+		error_c(Edelim, c);

+}

+

+void

+atnl(void)

+{

+	skipbl();

+	if(getch() != '\n')

+		error(Enewline);

+}

+

+void

+getrhs(String *s, int delim, int cmd)

+{

+	int c;

+

+	while((c = getch())>0 && c!=delim && c!='\n'){

+		if(c == '\\'){

+			if((c=getch()) <= 0)

+				error(Ebadrhs);

+			if(c == '\n'){

+				ungetch();

+				c='\\';

+			}else if(c == 'n')

+				c='\n';

+			else if(c!=delim && (cmd=='s' || c!='\\'))	/* s does its own */

+				Straddc(s, '\\');

+		}

+		Straddc(s, c);

+	}

+	ungetch();	/* let client read whether delimeter, '\n' or whatever */

+}

+

+String *

+collecttoken(char *end)

+{

+	String *s = newstring();

+	int c;

+

+	while((c=nextc())==' ' || c=='\t')

+		Straddc(s, getch()); /* blanks significant for getname() */

+	while((c=getch())>0 && utfrune(end, c)==0)

+		Straddc(s, c);

+	Straddc(s, 0);

+	if(c != '\n')

+		atnl();

+	return s;

+}

+

+String *

+collecttext(void)

+{

+	String *s = newstring();

+	int begline, i, c, delim;

+

+	if(skipbl()=='\n'){

+		getch();

+		i = 0;

+		do{

+			begline = i;

+			while((c = getch())>0 && c!='\n')

+				i++, Straddc(s, c);

+			i++, Straddc(s, '\n');

+			if(c < 0)

+				goto Return;

+		}while(s->s[begline]!='.' || s->s[begline+1]!='\n');

+		Strdelete(s, s->n-2, s->n);

+	}else{

+		okdelim(delim = getch());

+		getrhs(s, delim, 'a');

+		if(nextc()==delim)

+			getch();

+		atnl();

+	}

+    Return:

+	Straddc(s, 0);		/* JUST FOR CMDPRINT() */

+	return s;

+}

+

+Cmd *

+parsecmd(int nest)

+{

+	int i, c;

+	Cmdtab *ct;

+	Cmd *cp, *ncp;

+	Cmd cmd;

+

+	cmd.next = cmd.ccmd = 0;

+	cmd.re = 0;

+	cmd.flag = cmd.num = 0;

+	cmd.addr = compoundaddr();

+	if(skipbl() == -1)

+		return 0;

+	if((c=getch())==-1)

+		return 0;

+	cmd.cmdc = c;

+	if(cmd.cmdc=='c' && nextc()=='d'){	/* sleazy two-character case */

+		getch();		/* the 'd' */

+		cmd.cmdc='c'|0x100;

+	}

+	i = lookup(cmd.cmdc);

+	if(i >= 0){

+		if(cmd.cmdc == '\n')

+			goto Return;	/* let nl_cmd work it all out */

+		ct = &cmdtab[i];

+		if(ct->defaddr==aNo && cmd.addr)

+			error(Enoaddr);

+		if(ct->count)

+			cmd.num = getnum(ct->count);

+		if(ct->regexp){

+			/* x without pattern -> .*\n, indicated by cmd.re==0 */

+			/* X without pattern is all files */

+			if((ct->cmdc!='x' && ct->cmdc!='X') ||

+			   ((c = nextc())!=' ' && c!='\t' && c!='\n')){

+				skipbl();

+				if((c = getch())=='\n' || c<0)

+					error(Enopattern);

+				okdelim(c);

+				cmd.re = getregexp(c);

+				if(ct->cmdc == 's'){

+					cmd.ctext = newstring();

+					getrhs(cmd.ctext, c, 's');

+					if(nextc() == c){

+						getch();

+						if(nextc() == 'g')

+							cmd.flag = getch();

+					}

+			

+				}

+			}

+		}

+		if(ct->addr && (cmd.caddr=simpleaddr())==0)

+			error(Eaddress);

+		if(ct->defcmd){

+			if(skipbl() == '\n'){

+				getch();

+				cmd.ccmd = newcmd();

+				cmd.ccmd->cmdc = ct->defcmd;

+			}else if((cmd.ccmd = parsecmd(nest))==0)

+				panic("defcmd");

+		}else if(ct->text)

+			cmd.ctext = collecttext();

+		else if(ct->token)

+			cmd.ctext = collecttoken(ct->token);

+		else

+			atnl();

+	}else

+		switch(cmd.cmdc){

+		case '{':

+			cp = 0;

+			do{

+				if(skipbl()=='\n')

+					getch();

+				ncp = parsecmd(nest+1);

+				if(cp)

+					cp->next = ncp;

+				else

+					cmd.ccmd = ncp;

+			}while(cp = ncp);

+			break;

+		case '}':

+			atnl();

+			if(nest==0)

+				error(Enolbrace);

+			return 0;

+		default:

+			error_c(Eunk, cmd.cmdc);

+		}

+    Return:

+	cp = newcmd();

+	*cp = cmd;

+	return cp;

+}

+

+String*				/* BUGGERED */

+getregexp(int delim)

+{

+	String *r = newre();

+	int c;

+

+	for(Strzero(&genstr); ; Straddc(&genstr, c))

+		if((c = getch())=='\\'){

+			if(nextc()==delim)

+				c = getch();

+			else if(nextc()=='\\'){

+				Straddc(&genstr, c);

+				c = getch();

+			}

+		}else if(c==delim || c=='\n')

+			break;

+	if(c!=delim && c)

+		ungetch();

+	if(genstr.n > 0){

+		patset = TRUE;

+		Strduplstr(&lastpat, &genstr);

+		Straddc(&lastpat, '\0');

+	}

+	if(lastpat.n <= 1)

+		error(Epattern);

+	Strduplstr(r, &lastpat);

+	return r;

+}

+

+Addr *

+simpleaddr(void)

+{

+	Addr addr;

+	Addr *ap, *nap;

+

+	addr.next = 0;

+	addr.left = 0;

+	switch(skipbl()){

+	case '#':

+		addr.type = getch();

+		addr.num = getnum(1);

+		break;

+	case '0': case '1': case '2': case '3': case '4':

+	case '5': case '6': case '7': case '8': case '9': 

+		addr.num = getnum(1);

+		addr.type='l';

+		break;

+	case '/': case '?': case '"':

+		addr.are = getregexp(addr.type = getch());

+		break;

+	case '.':

+	case '$':

+	case '+':

+	case '-':

+	case '\'':

+		addr.type = getch();

+		break;

+	default:

+		return 0;

+	}

+	if(addr.next = simpleaddr())

+		switch(addr.next->type){

+		case '.':

+		case '$':

+		case '\'':

+			if(addr.type!='"')

+		case '"':

+				error(Eaddress);

+			break;

+		case 'l':

+		case '#':

+			if(addr.type=='"')

+				break;

+			/* fall through */

+		case '/':

+		case '?':

+			if(addr.type!='+' && addr.type!='-'){

+				/* insert the missing '+' */

+				nap = newaddr();

+				nap->type='+';

+				nap->next = addr.next;

+				addr.next = nap;

+			}

+			break;

+		case '+':

+		case '-':

+			break;

+		default:

+			panic("simpleaddr");

+		}

+	ap = newaddr();

+	*ap = addr;

+	return ap;

+}

+

+Addr *

+compoundaddr(void)

+{

+	Addr addr;

+	Addr *ap, *next;

+

+	addr.left = simpleaddr();

+	if((addr.type = skipbl())!=',' && addr.type!=';')

+		return addr.left;

+	getch();

+	next = addr.next = compoundaddr();

+	if(next && (next->type==',' || next->type==';') && next->left==0)

+		error(Eaddress);

+	ap = newaddr();

+	*ap = addr;

+	return ap;

+}

--- /dev/null

+++ b/sys/src/cmd/jam/disk.c

@@ -1,0 +1,121 @@

+#include "sam.h"

+

+static	Block	*blist;

+

+static int

+tempdisk(void)

+{

+	char buf[128];

+	int i, fd;

+

+	snprint(buf, sizeof buf, "/tmp/X%d.%.4sjam", getpid(), getuser());

+	for(i='A'; i<='Z'; i++){

+		buf[5] = i;

+		if(access(buf, AEXIST) == 0)

+			continue;

+		fd = create(buf, ORDWR|ORCLOSE|OCEXEC, 0600);

+		if(fd >= 0)

+			return fd;

+	}

+	return -1;

+}

+

+Disk*

+diskinit()

+{

+	Disk *d;

+

+	d = emalloc(sizeof(Disk));

+	d->fd = tempdisk();

+	if(d->fd < 0){

+		fprint(2, "jam: can't create temp file: %r\n");

+		exits("diskinit");

+	}

+	return d;

+}

+

+static

+uint

+ntosize(uint n, uint *ip)

+{

+	uint size;

+

+	if(n > Maxblock)

+		panic("internal error: ntosize");

+	size = n;

+	if(size & (Blockincr-1))

+		size += Blockincr - (size & (Blockincr-1));

+	/* last bucket holds blocks of exactly Maxblock */

+	if(ip)

+		*ip = size/Blockincr;

+	return size * sizeof(Rune);

+}

+

+Block*

+disknewblock(Disk *d, uint n)

+{

+	uint i, j, size;

+	Block *b;

+

+	size = ntosize(n, &i);

+	b = d->free[i];

+	if(b)

+		d->free[i] = b->next;

+	else{

+		/* allocate in chunks to reduce malloc overhead */

+		if(blist == nil){

+			blist = emalloc(100*sizeof(Block));

+			for(j=0; j<100-1; j++)

+				blist[j].next = &blist[j+1];

+		}

+		b = blist;

+		blist = b->next;

+		b->addr = d->addr;

+		if(d->addr+size < d->addr){

+			panic("temp file overflow");

+		}

+		d->addr += size;

+	}

+	b->n = n;

+	return b;

+}

+

+void

+diskrelease(Disk *d, Block *b)

+{

+	uint i;

+

+	ntosize(b->n, &i);

+	b->next = d->free[i];

+	d->free[i] = b;

+}

+

+void

+diskwrite(Disk *d, Block **bp, Rune *r, uint n)

+{

+	int size, nsize;

+	Block *b;

+

+	b = *bp;

+	size = ntosize(b->n, nil);

+	nsize = ntosize(n, nil);

+	if(size != nsize){

+		diskrelease(d, b);

+		b = disknewblock(d, n);

+		*bp = b;

+	}

+	if(pwrite(d->fd, r, n*sizeof(Rune), b->addr) != n*sizeof(Rune))

+		panic("write error to temp file");

+	b->n = n;

+}

+

+void

+diskread(Disk *d, Block *b, Rune *r, uint n)

+{

+	if(n > b->n)

+		panic("internal error: diskread");

+

+	ntosize(b->n, nil);	/* called only for sanity check on Maxblock */

+	if(pread(d->fd, r, n*sizeof(Rune), b->addr) != n*sizeof(Rune))

+		panic("read error from temp file");

+}

--- /dev/null

+++ b/sys/src/cmd/jam/error.c

@@ -1,0 +1,144 @@

+#include "sam.h"

+

+static char *emsg[]={

+	/* error_s */

+	"can't open",

+	"can't create",

+	"not in menu:",

+	"changes to",

+	"I/O error:",

+	"can't write while changing:",

+	/* error_c */

+	"unknown command",

+	"no operand for",

+	"bad delimiter",

+	/* error */

+	"can't fork",

+	"interrupt",

+	"address",

+	"search",

+	"pattern",

+	"newline expected",

+	"blank expected",

+	"pattern expected",

+	"can't nest X or Y",

+	"unmatched `}'",

+	"command takes no address",

+	"addresses overlap",

+	"substitution",

+	"& match too long",

+	"bad \\ in rhs",

+	"address range",

+	"changes not in sequence",

+	"addresses out of order",

+	"no file name",

+	"unmatched `('",

+	"unmatched `)'",

+	"malformed `[]'",

+	"malformed regexp",

+	"reg. exp. list overflow",

+	"plan 9 command",

+	"can't pipe",

+	"no current file",

+	"string too long",

+	"changed files",

+	"empty string",

+	"file search",

+	"non-unique match for \"\"",

+	"tag match too long",

+	"too many subexpressions",

+	"temporary file too large",

+	"file is append-only",

+	"no destination for plumb message",

+	"internal read error in buffer load",

+};

+static char *wmsg[]={

+	/* warn_s */

+	"duplicate file name",

+	"no such file",

+	"write might change good version of",

+	/* warn_S */

+	"files might be aliased",

+	/* warn */

+	"null characters elided",

+	"can't run pwd",

+	"last char not newline",

+	"exit status",

+};

+

+void

+error(Err s)

+{

+	char buf[512];

+

+	sprint(buf, "?%s", emsg[s]);

+	hiccough(buf);

+}

+

+void

+error_s(Err s, char *a)

+{

+	char buf[512];

+

+	sprint(buf, "?%s \"%s\"", emsg[s], a);

+	hiccough(buf);

+}

+

+void

+error_r(Err s, char *a)

+{

+	char buf[512];

+

+	sprint(buf, "?%s \"%s\": %r", emsg[s], a);

+	hiccough(buf);

+}

+

+void

+error_c(Err s, int c)

+{

+	char buf[512];

+

+	sprint(buf, "?%s `%C'", emsg[s], c);

+	hiccough(buf);

+}

+

+void

+warn(Warn s)

+{

+	dprint("?warning: %s\n", wmsg[s]);

+}

+

+void

+warn_S(Warn s, String *a)

+{

+	print_s(wmsg[s], a);

+}

+

+void

+warn_SS(Warn s, String *a, String *b)

+{

+	print_ss(wmsg[s], a, b);

+}

+

+void

+warn_s(Warn s, char *a)

+{

+	dprint("?warning: %s `%s'\n", wmsg[s], a);

+}

+

+void

+termwrite(char *s)

+{

+	String *p;

+

+	if(downloaded){

+		p = tmpcstr(s);

+		if(cmd)

+			loginsert(cmd, cmdpt, p->s, p->n);

+		else

+			Strinsert(&cmdstr, p, cmdstr.n);

+		cmdptadv += p->n;

+		freetmpstr(p);

+	}else

+		Write(2, s, strlen(s));

+}

--- /dev/null

+++ b/sys/src/cmd/jam/errors.h

@@ -1,0 +1,65 @@

+typedef enum Err{

+	/* error_s */

+	Eopen,

+	Ecreate,

+	Emenu,

+	Emodified,

+	Eio,

+	Ewseq,

+	/* error_c */

+	Eunk,

+	Emissop,

+	Edelim,

+	/* error */

+	Efork,

+	Eintr,

+	Eaddress,

+	Esearch,

+	Epattern,

+	Enewline,

+	Eblank,

+	Enopattern,

+	EnestXY,

+	Enolbrace,

+	Enoaddr,

+	Eoverlap,

+	Enosub,

+	Elongrhs,

+	Ebadrhs,

+	Erange,

+	Esequence,

+	Eorder,

+	Enoname,

+	Eleftpar,

+	Erightpar,

+	Ebadclass,

+	Ebadregexp,

+	Eoverflow,

+	Enocmd,

+	Epipe,

+	Enofile,

+	Etoolong,

+	Echanges,

+	Eempty,

+	Efsearch,

+	Emanyfiles,

+	Elongtag,

+	Esubexp,

+	Etmpovfl,

+	Eappend,

+	Ecantplumb,

+	Ebufload,

+}Err;

+typedef enum Warn{

+	/* warn_s */

+	Wdupname,

+	Wfile,

+	Wdate,

+	/* warn_ss */

+	Wdupfile,

+	/* warn */

+	Wnulls,

+	Wpwd,

+	Wnotnewline,

+	Wbadstatus,

+}Warn;

--- /dev/null

+++ b/sys/src/cmd/jam/file.c

@@ -1,0 +1,610 @@

+#include "sam.h"

+

+/*

+ * Structure of Undo list:

+ * 	The Undo structure follows any associated data, so the list

+ *	can be read backwards: read the structure, then read whatever

+ *	data is associated (insert string, file name) and precedes it.

+ *	The structure includes the previous value of the modify bit

+ *	and a sequence number; successive Undo structures with the

+ *	same sequence number represent simultaneous changes.

+ */

+

+typedef struct Undo Undo;

+typedef struct Merge Merge;

+

+struct Undo

+{

+	short	type;		/* Delete, Insert, Filename, Dot, Mark */

+	short	mod;		/* modify bit */

+	uint	seq;		/* sequence number */

+	uint	p0;		/* location of change (unused in f) */

+	uint	n;		/* # runes in string or file name */

+};

+

+struct Merge

+{

+	File	*f;

+	uint	seq;		/* of logged change */

+	uint	p0;		/* location of change (unused in f) */

+	uint	n;		/* # runes to delete */

+	uint	nbuf;		/* # runes to insert */

+	Rune	buf[RBUFSIZE];

+};

+

+enum

+{

+	Maxmerge = 50,

+	Undosize = sizeof(Undo)/sizeof(Rune),

+};

+

+static Merge	merge;

+

+File*

+fileopen(void)

+{

+	File *f;

+

+	f = emalloc(sizeof(File));

+	f->dot.f = f;

+	f->ndot.f = f;

+	f->seq = 0;

+	f->mod = FALSE;

+	f->unread = TRUE;

+	Strinit0(&f->name);

+	return f;

+}

+

+int

+fileisdirty(File *f)

+{

+	return f->seq != f->cleanseq;

+}

+

+static void

+wrinsert(Buffer *delta, int seq, int mod, uint p0, Rune *s, uint ns)

+{

+	Undo u;

+

+	u.type = Insert;

+	u.mod = mod;

+	u.seq = seq;

+	u.p0 = p0;

+	u.n = ns;

+	bufinsert(delta, delta->nc, s, ns);

+	bufinsert(delta, delta->nc, (Rune*)&u, Undosize);

+}

+

+static void

+wrdelete(Buffer *delta, int seq, int mod, uint p0, uint p1)

+{

+	Undo u;

+

+	u.type = Delete;

+	u.mod = mod;

+	u.seq = seq;

+	u.p0 = p0;

+	u.n = p1 - p0;

+	bufinsert(delta, delta->nc, (Rune*)&u, Undosize);

+}

+

+void

+flushmerge(void)

+{

+	File *f;

+

+	f = merge.f;

+	if(f == nil)

+		return;

+	if(merge.seq != f->seq)

+		panic("flushmerge seq mismatch");

+	if(merge.n != 0)

+		wrdelete(&f->epsilon, f->seq, TRUE, merge.p0, merge.p0+merge.n);

+	if(merge.nbuf != 0)

+		wrinsert(&f->epsilon, f->seq, TRUE, merge.p0+merge.n, merge.buf, merge.nbuf);

+	merge.f = nil;

+	merge.n = 0;

+	merge.nbuf = 0;

+}

+

+void

+mergeextend(File *f, uint p0)

+{

+	uint mp0n;

+

+	mp0n = merge.p0+merge.n;

+	if(mp0n != p0){

+		bufread(f, mp0n, merge.buf+merge.nbuf, p0-mp0n);

+		merge.nbuf += p0-mp0n;

+		merge.n = p0-merge.p0;

+	}

+}

+

+/*

+ * like fileundelete, but get the data from arguments

+ */

+void

+loginsert(File *f, uint p0, Rune *s, uint ns)

+{

+	if(f->rescuing)

+		return;

+	if(ns == 0)

+		return;

+	if(ns>STRSIZE)

+		panic("loginsert");

+	if(f->seq < seq)

+		filemark(f);

+	if(p0 < f->hiposn)

+		error(Esequence);

+

+	if(merge.f != f

+	|| p0-(merge.p0+merge.n)>Maxmerge			/* too far */

+	|| merge.nbuf+((p0+ns)-(merge.p0+merge.n))>=RBUFSIZE)	/* too long */

+		flushmerge();

+

+	if(ns>=RBUFSIZE){

+		if(!(merge.n == 0 && merge.nbuf == 0 && merge.f == nil))

+			panic("loginsert bad merge state");

+		wrinsert(&f->epsilon, f->seq, TRUE, p0, s, ns);

+	}else{

+		if(merge.f != f){

+			merge.f = f;

+			merge.p0 = p0;

+			merge.seq = f->seq;

+		}

+		mergeextend(f, p0);

+

+		/* append string to merge */

+		runemove(merge.buf+merge.nbuf, s, ns);

+		merge.nbuf += ns;

+	}

+

+	f->hiposn = p0;

+	if(!f->unread && !f->mod)

+		state(f, Dirty);

+}

+

+void

+logdelete(File *f, uint p0, uint p1)

+{

+	if(f->rescuing)

+		return;

+	if(p0 == p1)

+		return;

+	if(f->seq < seq)

+		filemark(f);

+	if(p0 < f->hiposn)

+		error(Esequence);

+

+	if(merge.f != f

+	|| p0-(merge.p0+merge.n)>Maxmerge			/* too far */

+	|| merge.nbuf+(p0-(merge.p0+merge.n))>=RBUFSIZE){	/* too long */

+		flushmerge();

+		merge.f = f;

+		merge.p0 = p0;

+		merge.seq = f->seq;

+	}

+

+	mergeextend(f, p0);

+

+	/* add to deletion */

+	merge.n = p1-merge.p0;

+

+	f->hiposn = p1;

+	if(!f->unread && !f->mod)

+		state(f, Dirty);

+}

+

+/*

+ * like fileunsetname, but get the data from arguments

+ */

+void

+logsetname(File *f, String *s)

+{

+	Undo u;

+	Buffer *delta;

+

+	if(f->rescuing)

+		return;

+

+	if(f->unread){	/* This is setting initial file name */

+		filesetname(f, s);

+		return;

+	}

+

+	if(f->seq < seq)

+		filemark(f);

+

+	/* undo a file name change by restoring old name */

+	delta = &f->epsilon;

+	u.type = Filename;

+	u.mod = TRUE;

+	u.seq = f->seq;

+	u.p0 = 0;	/* unused */

+	u.n = s->n;

+	if(s->n)

+		bufinsert(delta, delta->nc, s->s, s->n);

+	bufinsert(delta, delta->nc, (Rune*)&u, Undosize);

+	if(!f->unread && !f->mod)

+		state(f, Dirty);

+}

+

+#ifdef NOTEXT

+File*

+fileaddtext(File *f, Text *t)

+{

+	if(f == nil){

+		f = emalloc(sizeof(File));

+		f->unread = TRUE;

+	}

+	f->text = realloc(f->text, (f->ntext+1)*sizeof(Text*));

+	f->text[f->ntext++] = t;

+	f->curtext = t;

+	return f;

+}

+

+void

+filedeltext(File *f, Text *t)

+{

+	int i;

+

+	for(i=0; i<f->ntext; i++)

+		if(f->text[i] == t)

+			goto Found;

+	panic("can't find text in filedeltext");

+

+    Found:

+	f->ntext--;

+	if(f->ntext == 0){

+		fileclose(f);

+		return;

+	}

+	memmove(f->text+i, f->text+i+1, (f->ntext-i)*sizeof(Text*));

+	if(f->curtext == t)

+		f->curtext = f->text[0];

+}

+#endif

+

+void

+fileuninsert(File *f, Buffer *delta, uint p0, uint ns)

+{

+	Undo u;

+

+	/* undo an insertion by deleting */

+	u.type = Delete;

+	u.mod = f->mod;

+	u.seq = f->seq;

+	u.p0 = p0;

+	u.n = ns;

+	bufinsert(delta, delta->nc, (Rune*)&u, Undosize);

+}

+

+void

+fileundelete(File *f, Buffer *delta, uint p0, uint p1)

+{

+	Undo u;

+	Rune *buf;

+	uint i, n;

+

+	/* undo a deletion by inserting */

+	u.type = Insert;

+	u.mod = f->mod;

+	u.seq = f->seq;

+	u.p0 = p0;

+	u.n = p1-p0;

+	buf = fbufalloc();

+	for(i=p0; i<p1; i+=n){

+		n = p1 - i;

+		if(n > RBUFSIZE)

+			n = RBUFSIZE;

+		bufread(f, i, buf, n);

+		bufinsert(delta, delta->nc, buf, n);

+	}

+	fbuffree(buf);

+	bufinsert(delta, delta->nc, (Rune*)&u, Undosize);

+

+}

+

+int

+filereadc(File *f, uint q)

+{

+	Rune r;

+

+	if(q >= f->nc)

+		return -1;

+	bufread(f, q, &r, 1);

+	return r;

+}

+

+void

+filesetname(File *f, String *s)

+{

+	if(!f->unread)	/* This is setting initial file name */

+		fileunsetname(f, &f->delta);

+	Strduplstr(&f->name, s);

+	sortname(f);

+	f->unread = TRUE;

+}

+

+void

+fileunsetname(File *f, Buffer *delta)

+{

+	String s;

+	Undo u;

+

+	/* undo a file name change by restoring old name */

+	u.type = Filename;

+	u.mod = f->mod;

+	u.seq = f->seq;

+	u.p0 = 0;	/* unused */

+	Strinit(&s);

+	Strduplstr(&s, &f->name);

+	fullname(&s);

+	u.n = s.n;

+	if(s.n)

+		bufinsert(delta, delta->nc, s.s, s.n);

+	bufinsert(delta, delta->nc, (Rune*)&u, Undosize);

+	Strclose(&s);

+}

+

+void

+fileunsetdot(File *f, Buffer *delta, Range dot)

+{

+	Undo u;

+

+	u.type = Dot;

+	u.mod = f->mod;

+	u.seq = f->seq;

+	u.p0 = dot.p1;

+	u.n = dot.p2 - dot.p1;

+	bufinsert(delta, delta->nc, (Rune*)&u, Undosize);

+}

+

+void

+fileunsetmark(File *f, Buffer *delta, Range mark)

+{

+	Undo u;

+

+	u.type = Mark;

+	u.mod = f->mod;

+	u.seq = f->seq;

+	u.p0 = mark.p1;

+	u.n = mark.p2 - mark.p1;

+	bufinsert(delta, delta->nc, (Rune*)&u, Undosize);

+}

+

+uint

+fileload(File *f, uint p0, int fd, int *nulls)

+{

+	if(f->seq > 0)

+		panic("undo in file.load unimplemented");

+	return bufload(f, p0, fd, nulls);

+}

+

+int

+fileupdate(File *f, int notrans, int toterm)

+{

+	uint p1, p2;

+	int mod;

+

+	if(f->rescuing)

+		return FALSE;

+

+	flushmerge();

+

+	/*

+	 * fix the modification bit

+	 * subtle point: don't save it away in the log.

+	 *

+	 * if another change is made, the correct f->mod

+	 * state is saved  in the undo log by filemark

+	 * when setting the dot and mark.

+	 *

+	 * if the change is undone, the correct state is

+	 * saved from f in the fileun... routines.

+	 */

+	mod = f->mod;

+	f->mod = f->prevmod;

+	if(f == cmd)

+		notrans = TRUE;

+	else{

+		fileunsetdot(f, &f->delta, f->prevdot);

+		fileunsetmark(f, &f->delta, f->prevmark);

+	}

+	f->dot = f->ndot;

+	fileundo(f, FALSE, !notrans, &p1, &p2, toterm);

+	f->mod = mod;

+

+	if(f->delta.nc == 0)

+		f->seq = 0;

+

+	if(f == cmd)

+		return FALSE;

+

+	if(f->mod){

+		f->closeok = 0;

+		quitok = 0;

+	}else

+		f->closeok = 1;

+	return TRUE;

+}

+

+long

+prevseq(Buffer *b)

+{

+	Undo u;

+	uint up;

+

+	up = b->nc;

+	if(up == 0)

+		return 0;

+	up -= Undosize;

+	bufread(b, up, (Rune*)&u, Undosize);

+	return u.seq;

+}

+

+long

+undoseq(File *f, int isundo)

+{

+	if(isundo)

+		return f->seq;

+

+	return prevseq(&f->epsilon);

+}

+

+void

+fileundo(File *f, int isundo, int canredo, uint *q0p, uint *q1p, int flag)

+{

+	Undo u;

+	Rune *buf;

+	uint i, n, up;

+	uint stop;

+	Buffer *delta, *epsilon;

+

+	if(isundo){

+		/* undo; reverse delta onto epsilon, seq decreases */

+		delta = &f->delta;

+		epsilon = &f->epsilon;

+		stop = f->seq;

+	}else{

+		/* redo; reverse epsilon onto delta, seq increases */

+		delta = &f->epsilon;

+		epsilon = &f->delta;

+		stop = 0;	/* don't know yet */

+	}

+

+	raspstart(f);

+	while(delta->nc > 0){

+		/* rasp and buffer are in sync; sync with wire if needed */

+		if(needoutflush())

+			raspflush(f);

+		up = delta->nc-Undosize;

+		bufread(delta, up, (Rune*)&u, Undosize);

+		if(isundo){

+			if(u.seq < stop){

+				f->seq = u.seq;

+				raspdone(f, flag);

+				return;

+			}

+		}else{

+			if(stop == 0)

+				stop = u.seq;

+			if(u.seq > stop){

+				raspdone(f, flag);

+				return;

+			}

+		}

+		switch(u.type){

+		default:

+			panic("undo unknown u.type");

+			break;

+

+		case Delete:

+			f->seq = u.seq;

+			if(canredo)

+				fileundelete(f, epsilon, u.p0, u.p0+u.n);

+			f->mod = u.mod;

+			bufdelete(f, u.p0, u.p0+u.n);

+			raspdelete(f, u.p0, u.p0+u.n, flag);

+			*q0p = u.p0;

+			*q1p = u.p0;

+			break;

+

+		case Insert:

+			f->seq = u.seq;

+			if(canredo)

+				fileuninsert(f, epsilon, u.p0, u.n);

+			f->mod = u.mod;

+			up -= u.n;

+			buf = fbufalloc();

+			for(i=0; i<u.n; i+=n){

+				n = u.n - i;

+				if(n > RBUFSIZE)

+					n = RBUFSIZE;

+				bufread(delta, up+i, buf, n);

+				bufinsert(f, u.p0+i, buf, n);

+				raspinsert(f, u.p0+i, buf, n, flag);

+			}

+			fbuffree(buf);

+			*q0p = u.p0;

+			*q1p = u.p0+u.n;

+			break;

+

+		case Filename:

+			f->seq = u.seq;

+			if(canredo)

+				fileunsetname(f, epsilon);

+			f->mod = u.mod;

+			up -= u.n;

+

+			Strinsure(&f->name, u.n+1);

+			bufread(delta, up, f->name.s, u.n);

+			f->name.s[u.n] = 0;

+			f->name.n = u.n;

+			fixname(&f->name);

+			sortname(f);

+			break;

+		case Dot:

+			f->seq = u.seq;

+			if(canredo)

+				fileunsetdot(f, epsilon, f->dot.r);

+			f->mod = u.mod;

+			f->dot.r.p1 = u.p0;

+			f->dot.r.p2 = u.p0 + u.n;

+			break;

+		case Mark:

+			f->seq = u.seq;

+			if(canredo)

+				fileunsetmark(f, epsilon, f->mark);

+			f->mod = u.mod;

+			f->mark.p1 = u.p0;

+			f->mark.p2 = u.p0 + u.n;

+			break;

+		}

+		bufdelete(delta, up, delta->nc);

+	}

+	if(isundo)

+		f->seq = 0;

+	raspdone(f, flag);

+}

+

+void

+filereset(File *f)

+{

+	bufreset(&f->delta);

+	bufreset(&f->epsilon);

+	f->seq = 0;

+}

+

+void

+fileclose(File *f)

+{

+	Strclose(&f->name);

+	bufclose(f);

+	bufclose(&f->delta);

+	bufclose(&f->epsilon);

+	if(f->rasp)

+		listfree(f->rasp);

+	free(f);

+}

+

+void

+filemark(File *f)

+{

+

+	if(f->unread)

+		return;

+	if(f->epsilon.nc)

+		bufdelete(&f->epsilon, 0, f->epsilon.nc);

+

+	if(f != cmd){

+		f->prevdot = f->dot.r;

+		f->prevmark = f->mark;

+		f->prevseq = f->seq;

+		f->prevmod = f->mod;

+	}

+

+	f->ndot = f->dot;

+	f->seq = seq;

+	f->hiposn = 0;

+}

--- /dev/null

+++ b/sys/src/cmd/jam/io.c

@@ -1,0 +1,283 @@

+#include "sam.h"

+

+#define	NSYSFILE	3

+#define	NOFILE		128

+

+void

+checkqid(File *f)

+{

+	int i, w;

+	File *g;

+

+	w = whichmenu(f);

+	for(i=1; i<file.nused; i++){

+		g = file.filepptr[i];

+		if(w == i)

+			continue;

+		if(f->dev==g->dev && f->qidpath==g->qidpath)

+			warn_SS(Wdupfile, &f->name, &g->name);

+	}

+}

+

+void

+writef(File *f)

+{

+	Posn n;

+	char *name;

+	int i, samename, newfile;

+	ulong dev;

+	uvlong qid;

+	long mtime, appendonly, length;

+

+	newfile = 0;

+	samename = Strcmp(&genstr, &f->name) == 0;

+	name = Strtoc(&f->name);

+	i = statfile(name, &dev, &qid, &mtime, 0, 0);

+	if(i == -1)

+		newfile++;

+	else if(samename &&

+	        (f->dev!=dev || f->qidpath!=qid || f->mtime<mtime)){

+		f->dev = dev;

+		f->qidpath = qid;

+		f->mtime = mtime;

+		warn_S(Wdate, &genstr);

+		free(name);

+		return;

+	}

+	if(genc)

+		free(genc);

+	genc = Strtoc(&genstr);

+	if((io=create(genc, 1, 0666L)) < 0)

+		error_r(Ecreate, genc);

+	dprint("%s: ", genc);

+	if(statfd(io, 0, 0, 0, &length, &appendonly) > 0 && appendonly && length>0){

+		free(name);

+		error(Eappend);

+	}

+	n = writeio(f);

+	if(f->name.s[0]==0 || samename){

+		if(addr.r.p1==0 && addr.r.p2==f->nc)

+			f->cleanseq = f->seq;

+		state(f, f->cleanseq==f->seq? Clean : Dirty);

+	}

+	if(newfile)

+		dprint("(new file) ");

+	if(addr.r.p2>0 && filereadc(f, addr.r.p2-1)!='\n')

+		warn(Wnotnewline);

+	closeio(n);

+	if(f->name.s[0]==0 || samename){

+		if(statfile(genc, &dev, &qid, &mtime, 0, 0) > 0){

+			f->dev = dev;

+			f->qidpath = qid;

+			f->mtime = mtime;

+			checkqid(f);

+		}

+	}

+	free(name);

+}

+

+Posn

+readio(File *f, int *nulls, int setdate, int toterm)

+{

+	int n, b, w;

+	Rune *r;

+	Posn nt;

+	Posn p = addr.r.p2;

+	ulong dev;

+	uvlong qid;

+	long mtime;

+	char buf[BLOCKSIZE+1], *s;

+

+	*nulls = FALSE;

+	b = 0;

+	if(f->unread){

+		nt = bufload(f, 0, io, nulls);

+		if(toterm)

+			raspload(f);

+	}else

+		for(nt = 0; (n = read(io, buf+b, BLOCKSIZE-b))>0; nt+=(r-genbuf)){

+			n += b;

+			b = 0;

+			r = genbuf;

+			s = buf;

+			while(n > 0){

+				if((*r = *(uchar*)s) < Runeself){

+					if(*r)

+						r++;

+					else

+						*nulls = TRUE;

+					--n;

+					s++;

+					continue;

+				}

+				if(fullrune(s, n)){

+					w = chartorune(r, s);

+					if(*r)

+						r++;

+					else

+						*nulls = TRUE;

+					n -= w;

+					s += w;

+					continue;

+				}

+				b = n;

+				memmove(buf, s, b);

+				break;

+			}

+			loginsert(f, p, genbuf, r-genbuf);

+		}

+	if(b)

+		*nulls = TRUE;

+	if(*nulls)

+		warn(Wnulls);

+	if(setdate){

+		if(statfd(io, &dev, &qid, &mtime, 0, 0) > 0){

+			f->dev = dev;

+			f->qidpath = qid;

+			f->mtime = mtime;

+			checkqid(f);

+		}

+	}

+	return nt;

+}

+

+Posn

+writeio(File *f)

+{

+	int m, n;

+	Posn p = addr.r.p1;

+	char *c;

+

+	while(p < addr.r.p2){

+		if(addr.r.p2-p>BLOCKSIZE)

+			n = BLOCKSIZE;

+		else

+			n = addr.r.p2-p;

+		bufread(f, p, genbuf, n);

+		c = Strtoc(tmprstr(genbuf, n));

+		m = strlen(c);

+		if(Write(io, c, m) != m){

+			free(c);

+			if(p > 0)

+				p += n;

+			break;

+		}

+		free(c);

+		p += n;

+	}

+	return p-addr.r.p1;

+}

+void

+closeio(Posn p)

+{

+	close(io);

+	io = 0;

+	if(p >= 0)

+		dprint("#%lud\n", p);

+}

+

+int	remotefd0 = 0;

+int	remotefd1 = 1;

+

+void

+bootterm(char *machine, char **argv)

+{

+	int ph2t[2], pt2h[2];

+

+	if(machine){

+		dup(remotefd0, 0);

+		dup(remotefd1, 1);

+		close(remotefd0);

+		close(remotefd1);

+		argv[0] = "jamterm";

+		exec(samterm, argv);

+		fprint(2, "can't exec: ");

+		perror(samterm);

+		_exits("damn");

+	}

+	if(pipe(ph2t)==-1 || pipe(pt2h)==-1)

+		panic("pipe");

+	switch(fork()){

+	case 0:

+		dup(ph2t[0], 0);

+		dup(pt2h[1], 1);

+		close(ph2t[0]);

+		close(ph2t[1]);

+		close(pt2h[0]);

+		close(pt2h[1]);

+		argv[0] = "jamterm";

+		exec(samterm, argv);

+		fprint(2, "can't exec: ");

+		perror(samterm);

+		_exits("damn");

+	case -1:

+		panic("can't fork jamterm");

+	}

+	dup(pt2h[0], 0);

+	dup(ph2t[1], 1);

+	close(ph2t[0]);

+	close(ph2t[1]);

+	close(pt2h[0]);

+	close(pt2h[1]);

+}

+

+void

+connectto(char *machine, char **argv)

+{

+	int p1[2], p2[2];

+	char **av;

+	int ac;

+	

+	// count args

+	for(av = argv; *av; av++)

+		;

+	av = malloc(sizeof(char*)*((av-argv) + 5));

+	if(av == nil){

+		dprint("out of memory\n");

+		exits("fork/exec");

+	}

+	ac = 0;

+	av[ac++] = RX;

+	av[ac++] = machine;

+	av[ac++] = rsamname;

+	av[ac++] = "-R";

+	while(*argv)

+		av[ac++] = *argv++;

+	av[ac] = 0;

+	if(pipe(p1)<0 || pipe(p2)<0){

+		dprint("can't pipe\n");

+		exits("pipe");

+	}

+	remotefd0 = p1[0];

+	remotefd1 = p2[1];

+	switch(fork()){

+	case 0:

+		dup(p2[0], 0);

+		dup(p1[1], 1);

+		close(p1[0]);

+		close(p1[1]);

+		close(p2[0]);

+		close(p2[1]);

+		exec(RXPATH, av);

+		dprint("can't exec %s\n", RXPATH);

+		exits("exec");

+

+	case -1:

+		dprint("can't fork\n");

+		exits("fork");

+	}

+	free(av);

+	close(p1[1]);

+	close(p2[0]);

+}

+

+void

+startup(char *machine, int Rflag, char **argv, char **files)

+{

+	if(machine)

+		connectto(machine, files);

+	if(!Rflag)

+		bootterm(machine, argv);

+	downloaded = 1;

+	outTs(Hversion, VERSION);

+}

--- /dev/null

+++ b/sys/src/cmd/jam/list.c

@@ -1,0 +1,96 @@

+#include "sam.h"

+

+/*

+ * Check that list has room for one more element.

+ */

+static void

+growlist(List *l, int esize)

+{

+	uchar *p;

+

+	if(l->listptr == nil || l->nalloc == 0){

+		l->nalloc = INCR;

+		l->listptr = emalloc(INCR*esize);

+		l->nused = 0;

+	}

+	else if(l->nused == l->nalloc){

+		p = erealloc(l->listptr, (l->nalloc+INCR)*esize);

+		l->listptr = p;

+		memset(p+l->nalloc*esize, 0, INCR*esize);

+		l->nalloc += INCR;

+	}

+}

+

+/*

+ * Remove the ith element from the list

+ */

+void

+dellist(List *l, int i)

+{

+	Posn *pp;

+	void **vpp;

+

+	l->nused--;

+

+	switch(l->type){

+	case 'P':

+		pp = l->posnptr+i;

+		memmove(pp, pp+1, (l->nused-i)*sizeof(*pp));

+		break;

+	case 'p':

+		vpp = l->voidpptr+i;

+		memmove(vpp, vpp+1, (l->nused-i)*sizeof(*vpp));

+		break;

+	}

+}

+

+/*

+ * Add a new element, whose position is i, to the list

+ */

+void

+inslist(List *l, int i, ...)

+{

+	Posn *pp;

+	void **vpp;

+	va_list list;

+

+

+	va_start(list, i);

+	switch(l->type){

+	case 'P':

+		growlist(l, sizeof(*pp));

+		pp = l->posnptr+i;

+		memmove(pp+1, pp, (l->nused-i)*sizeof(*pp));

+		*pp = va_arg(list, Posn);

+		break;

+	case 'p':

+		growlist(l, sizeof(*vpp));

+		vpp = l->voidpptr+i;

+		memmove(vpp+1, vpp, (l->nused-i)*sizeof(*vpp));

+		*vpp = va_arg(list, void*);

+		break;

+	}

+	va_end(list);

+

+	l->nused++;

+}

+

+void

+listfree(List *l)

+{

+	free(l->listptr);

+	free(l);

+}

+

+List*

+listalloc(int type)

+{

+	List *l;

+

+	l = emalloc(sizeof(List));

+	l->type = type;

+	l->nalloc = 0;

+	l->nused = 0;

+

+	return l;

+}

--- /dev/null

+++ b/sys/src/cmd/jam/mesg.c

@@ -1,0 +1,897 @@

+#include "sam.h"

+

+Header	h;

+uchar	indata[DATASIZE];

+uchar	outdata[2*DATASIZE+3];	/* room for overflow message */

+uchar	*inp;

+uchar	*outp;

+uchar	*outmsg = outdata;

+Posn	cmdpt;

+Posn	cmdptadv;

+Buffer	snarfbuf;

+int	waitack;

+int	outbuffered;

+int	tversion;

+

+int	inshort(void);

+long	inlong(void);

+vlong	invlong(void);

+int	inmesg(Tmesg);

+

+void	outshort(int);

+void	outlong(long);

+void	outvlong(vlong);

+void	outcopy(int, void*);

+void	outsend(void);

+void	outstart(Hmesg);

+

+void	setgenstr(File*, Posn, Posn);

+

+#ifdef DEBUG

+char *hname[] = {

+	[Hversion]	"Hversion",

+	[Hbindname]	"Hbindname",

+	[Hcurrent]	"Hcurrent",

+	[Hnewname]	"Hnewname",

+	[Hmovname]	"Hmovname",

+	[Hgrow]		"Hgrow",

+	[Hcheck0]	"Hcheck0",

+	[Hcheck]	"Hcheck",

+	[Hunlock]	"Hunlock",

+	[Hdata]		"Hdata",

+	[Horigin]	"Horigin",

+	[Hunlockfile]	"Hunlockfile",

+	[Hsetdot]	"Hsetdot",

+	[Hgrowdata]	"Hgrowdata",

+	[Hmoveto]	"Hmoveto",

+	[Hclean]	"Hclean",

+	[Hdirty]	"Hdirty",

+	[Hcut]		"Hcut",

+	[Hsetpat]	"Hsetpat",

+	[Hdelname]	"Hdelname",

+	[Hclose]	"Hclose",

+	[Hsetsnarf]	"Hsetsnarf",

+	[Hsnarflen]	"Hsnarflen",

+	[Hack]		"Hack",

+	[Hexit]		"Hexit",

+	[Hplumb]	"Hplumb",

+	[Hmenucmd]	"Hmenucmd",

+};

+

+char *tname[] = {

+	[Tversion]	"Tversion",

+	[Tstartcmdfile]	"Tstartcmdfile",

+	[Tcheck]	"Tcheck",

+	[Trequest]	"Trequest",

+	[Torigin]	"Torigin",

+	[Tstartfile]	"Tstartfile",

+	[Tworkfile]	"Tworkfile",

+	[Ttype]		"Ttype",

+	[Tcut]		"Tcut",

+	[Tpaste]	"Tpaste",

+	[Tsnarf]	"Tsnarf",

+	[Tstartnewfile]	"Tstartnewfile",

+	[Twrite]	"Twrite",

+	[Tclose]	"Tclose",

+	[Tlook]		"Tlook",

+	[Tsearch]	"Tsearch",

+	[Tsend]		"Tsend",

+	[Tdclick]	"Tdclick",

+	[Ttclick]	"Ttclick",

+	[Tstartsnarf]	"Tstartsnarf",

+	[Tsetsnarf]	"Tsetsnarf",

+	[Tack]		"Tack",

+	[Texit]		"Texit",

+	[Tplumb]	"Tplumb",

+	[Tmenucmd]	"Tmenucmd",

+	[Tmenucmdsend]	"Tmenucmdsend",

+};

+

+void

+journal(int out, char *s)

+{

+	static int fd = -1;

+

+	if(fd < 0)

+		fd = create("/tmp/jam.out", 1, 0666L);

+	if(fd >= 0)

+		fprint(fd, "%s%s\n", out? "out: " : "in:  ", s);

+}

+

+void

+journaln(int out, long n)

+{

+	char buf[32];

+

+	snprint(buf, sizeof(buf), "%ld", n);

+	journal(out, buf);

+}

+

+void

+journalv(int out, vlong v)

+{

+	char buf[32];

+

+	sprint(buf, sizeof(buf), "%lld", v);

+	journal(out, buf);

+}

+#else

+#define	journal(a, b)

+#define journaln(a, b)

+#define journalv(a, b)

+#endif

+

+int

+rcvchar(void){

+	static uchar buf[64];

+	static i, nleft = 0;

+

+	if(nleft <= 0){

+		nleft = read(0, (char *)buf, sizeof buf);

+		if(nleft <= 0)

+			return -1;

+		i = 0;

+	}

+	--nleft;

+	return buf[i++];

+}

+

+int

+rcv(void){

+	int c;

+	static state = 0;

+	static count = 0;

+	static i = 0;

+

+	while((c=rcvchar()) != -1)

+		switch(state){

+		case 0:

+			h.type = c;

+			state++;

+			break;

+

+		case 1:

+			h.count0 = c;

+			state++;

+			break;

+

+		case 2:

+			h.count1 = c;

+			count = h.count0|(h.count1<<8);

+			i = 0;

+			if(count > DATASIZE)

+				panic("count>DATASIZE");

+			if(count == 0)

+				goto zerocount;

+			state++;

+			break;

+

+		case 3:

+			indata[i++] = c;

+			if(i == count){

+		zerocount:

+				indata[i] = 0;

+				state = count = 0;

+				return inmesg(h.type);

+			}

+			break;

+		}

+	return 0;

+}

+

+File *

+whichfile(int tag)

+{

+	int i;

+

+	for(i = 0; i<file.nused; i++)

+		if(file.filepptr[i]->tag==tag)

+			return file.filepptr[i];

+	hiccough((char *)0);

+	return 0;

+}

+

+int

+inmesg(Tmesg type)

+{

+	Rune buf[1025];

+	char cbuf[64];

+	int i, m;

+	short s;

+	long l, l1;

+	vlong v;

+	File *f;

+	Posn p0, p1, p;

+	Range r;

+	String *str;

+	char *c, *wdir;

+	Rune *rp;

+	Plumbmsg *pm;

+

+	if(type > TMAX)

+		panic("inmesg");

+

+	journal(0, tname[type]);

+

+	inp = indata;

+	switch(type){

+	case -1:

+		panic("rcv error");

+

+	default:

+		fprint(2, "unknown type %d\n", type);

+		panic("rcv unknown");

+

+	case Tversion:

+		tversion = inshort();

+		journaln(0, tversion);

+		break;

+

+	case Tstartcmdfile:

+		v = invlong();		/* for 64-bit pointers */

+		journalv(0, v);

+		Strdupl(&genstr, samname);

+		cmd = newfile();

+		cmd->unread = 0;

+		outTsv(Hbindname, cmd->tag, v);

+		outTs(Hcurrent, cmd->tag);

+		logsetname(cmd, &genstr);

+		cmd->rasp = listalloc('P');

+		cmd->mod = 0;

+		if(cmdstr.n){

+			loginsert(cmd, 0L, cmdstr.s, cmdstr.n);

+			Strdelete(&cmdstr, 0L, (Posn)cmdstr.n);

+		}

+		fileupdate(cmd, FALSE, TRUE);

+		outT0(Hunlock);

+		break;

+

+	case Tcheck:

+		/* go through whichfile to check the tag */

+		outTs(Hcheck, whichfile(inshort())->tag);

+		break;

+

+	case Trequest:

+		f = whichfile(inshort());

+		p0 = inlong();

+		p1 = p0+inshort();

+		journaln(0, p0);

+		journaln(0, p1-p0);

+		if(f->unread)

+			panic("Trequest: unread");

+		if(p1>f->nc)

+			p1 = f->nc;

+		if(p0>f->nc) /* can happen e.g. scrolling during command */

+			p0 = f->nc;

+		if(p0 == p1){

+			i = 0;

+			r.p1 = r.p2 = p0;

+		}else{

+			r = rdata(f->rasp, p0, p1-p0);

+			i = r.p2-r.p1;

+			bufread(f, r.p1, buf, i);

+		}

+		buf[i]=0;

+		outTslS(Hdata, f->tag, r.p1, tmprstr(buf, i+1));

+		break;

+

+	case Torigin:

+		s = inshort();

+		l = inlong();

+		l1 = inlong();

+		journaln(0, l1);

+		lookorigin(whichfile(s), l, l1);

+		break;

+

+	case Tstartfile:

+		termlocked++;

+		f = whichfile(inshort());

+		if(!f->rasp)	/* this might be a duplicate message */

+			f->rasp = listalloc('P');

+		current(f);

+		outTsv(Hbindname, f->tag, invlong());	/* for 64-bit pointers */

+		outTs(Hcurrent, f->tag);

+		journaln(0, f->tag);

+		if(f->unread)

+			load(f);

+		else{

+			if(f->nc>0){

+				rgrow(f->rasp, 0L, f->nc);

+				outTsll(Hgrow, f->tag, 0L, f->nc);

+			}

+			outTs(Hcheck0, f->tag);

+			moveto(f, f->dot.r);

+		}

+		break;

+

+	case Tworkfile:

+		i = inshort();

+		f = whichfile(i);

+		current(f);

+		f->dot.r.p1 = inlong();

+		f->dot.r.p2 = inlong();

+		f->tdot = f->dot.r;

+		journaln(0, i);

+		journaln(0, f->dot.r.p1);

+		journaln(0, f->dot.r.p2);

+		break;

+

+	case Ttype:

+		f = whichfile(inshort());

+		p0 = inlong();

+		journaln(0, p0);

+		journal(0, (char*)inp);

+		str = tmpcstr((char*)inp);

+		i = str->n;

+		loginsert(f, p0, str->s, str->n);

+		if(fileupdate(f, FALSE, FALSE))

+			seq++;

+		if(f==cmd && p0==f->nc-i && i>0 && str->s[i-1]=='\n'){

+			freetmpstr(str);

+			termlocked++;

+			termcommand();

+		}else

+			freetmpstr(str);

+		f->dot.r.p1 = f->dot.r.p2 = p0+i; /* terminal knows this already */

+		f->tdot = f->dot.r;

+		break;

+

+	case Tcut:

+		f = whichfile(inshort());

+		p0 = inlong();

+		p1 = inlong();

+		journaln(0, p0);

+		journaln(0, p1);

+		logdelete(f, p0, p1);

+		if(fileupdate(f, FALSE, FALSE))

+			seq++;

+		f->dot.r.p1 = f->dot.r.p2 = p0;

+		f->tdot = f->dot.r;   /* terminal knows the value of dot already */

+		break;

+

+	case Tpaste:

+		f = whichfile(inshort());

+		p0 = inlong();

+		journaln(0, p0);

+		int fd = open("/dev/snarf", OREAD);

+		if(fd < 0)

+			panic("paste: open");

+		bufreset(&snarfbuf);

+		bufload(&snarfbuf, 0, fd, &i);

+		close(fd);

+		for(l=0; l<snarfbuf.nc; l+=m){

+			m = snarfbuf.nc-l;

+			if(m>BLOCKSIZE)

+				m = BLOCKSIZE;

+			bufread(&snarfbuf, l, genbuf, m);

+			loginsert(f, p0, tmprstr(genbuf, m)->s, m);

+		}

+		if(fileupdate(f, FALSE, TRUE))

+			seq++;

+		f->dot.r.p1 = p0;

+		f->dot.r.p2 = p0+snarfbuf.nc;

+		f->tdot.p1 = -1; /* force telldot to tell (arguably a BUG) */

+		telldot(f);

+		outTs(Hunlockfile, f->tag);

+		break;

+

+	case Tsnarf:

+		i = inshort();

+		p0 = inlong();

+		p1 = inlong();

+		snarf(whichfile(i), p0, p1, &snarfbuf, 0);

+		break;

+

+	case Tstartnewfile:

+		v = invlong();

+		Strdupl(&genstr, empty);

+		f = newfile();

+		f->rasp = listalloc('P');

+		outTsv(Hbindname, f->tag, v);

+		logsetname(f, &genstr);

+		outTs(Hcurrent, f->tag);

+		current(f);

+		load(f);

+		break;

+

+	case Twrite:

+		termlocked++;

+		i = inshort();

+		journaln(0, i);

+		f = whichfile(i);

+		addr.r.p1 = 0;

+		addr.r.p2 = f->nc;

+		if(f->name.s[0] == 0)

+			error(Enoname);

+		Strduplstr(&genstr, &f->name);

+		writef(f);

+		break;

+

+	case Tclose:

+		termlocked++;

+		i = inshort();

+		journaln(0, i);

+		f = whichfile(i);

+		current(f);

+		trytoclose(f);

+		/* if trytoclose fails, will error out */

+		delete(f);

+		break;

+

+	case Tlook:

+		f = whichfile(inshort());

+		termlocked++;

+		p0 = inlong();

+		p1 = inlong();

+		journaln(0, p0);

+		journaln(0, p1);

+		setgenstr(f, p0, p1);

+		for(l = 0; l<genstr.n; l++){

+			i = genstr.s[l];

+			if(utfrune(".*+?(|)\\[]^$", i)){

+				str = tmpcstr("\\");

+				Strinsert(&genstr, str, l++);

+				freetmpstr(str);

+			}

+		}

+		Straddc(&genstr, '\0');

+		nextmatch(f, &genstr, p1, 1);

+		moveto(f, sel.p[0]);

+		break;

+

+	case Tsearch:

+		termlocked++;

+		if(curfile == 0)

+			error(Enofile);

+		if(lastpat.s[0] == 0)

+			panic("Tsearch");

+		nextmatch(curfile, &lastpat, curfile->dot.r.p2, 1);

+		moveto(curfile, sel.p[0]);

+		break;

+

+	case Tsend:

+		termlocked++;

+		inshort();	/* ignored */

+		p0 = inlong();

+		p1 = inlong();

+		setgenstr(cmd, p0, p1);

+		bufreset(&snarfbuf);

+		bufinsert(&snarfbuf, (Posn)0, genstr.s, genstr.n);

+		outTl(Hsnarflen, genstr.n);

+		if(genstr.s[genstr.n-1] != '\n')

+			Straddc(&genstr, '\n');

+		loginsert(cmd, cmd->nc, genstr.s, genstr.n);

+		fileupdate(cmd, FALSE, TRUE);

+		cmd->dot.r.p1 = cmd->dot.r.p2 = cmd->nc;

+		telldot(cmd);

+		termcommand();

+		break;

+

+	case Tdclick:

+	case Ttclick:

+		f = whichfile(inshort());

+		p1 = inlong();

+		stretchsel(f, p1, type == Ttclick);

+		f->tdot.p1 = f->tdot.p2 = p1;

+		telldot(f);

+		outTs(Hunlockfile, f->tag);

+		break;

+

+	case Tstartsnarf:

+		if (snarfbuf.nc <= 0) {	/* nothing to export */

+			outTs(Hsetsnarf, 0);

+			break;

+		}

+		c = 0;

+		i = 0;

+		m = snarfbuf.nc;

+		if(m > SNARFSIZE) {

+			m = SNARFSIZE;

+			dprint("?warning: snarf buffer truncated\n");

+		}

+		rp = malloc(m*sizeof(Rune));

+		if(rp){

+			bufread(&snarfbuf, 0, rp, m);

+			c = Strtoc(tmprstr(rp, m));

+			free(rp);

+			i = strlen(c);

+		}

+		outTs(Hsetsnarf, i);

+		if(c){

+			Write(1, c, i);

+			free(c);

+		} else

+			dprint("snarf buffer too long\n");

+		break;

+

+	case Tsetsnarf:

+		m = inshort();

+		if(m > SNARFSIZE)

+			error(Etoolong);

+		c = malloc(m+1);

+		if(c){

+			for(i=0; i<m; i++)

+				c[i] = rcvchar();

+			c[m] = 0;

+			str = tmpcstr(c);

+			free(c);

+			bufreset(&snarfbuf);

+			bufinsert(&snarfbuf, (Posn)0, str->s, str->n);

+			freetmpstr(str);

+			outT0(Hunlock);

+		}

+		break;

+

+	case Tack:

+		waitack = 0;

+		break;

+

+	case Tplumb:

+		f = whichfile(inshort());

+		p0 = inlong();

+		p1 = inlong();

+		pm = emalloc(sizeof(Plumbmsg));

+		pm->src = strdup("jam");

+		pm->dst = 0;

+		/* construct current directory */

+		c = Strtoc(&f->name);

+		if(strcmp(c, "/tmp/jam.err") == 0){

+			pm->wdir = emalloc(1024);

+			getwd(pm->wdir, 1024);

+			cleanname(pm->wdir);

+			free(c);

+		}else if(c[0] == '/'){

+			pm->wdir = c;

+			if((c = strrchr(pm->wdir, '/')) != nil)

+				*c = '\0';

+		}else{

+			wdir = emalloc(1024);

+			getwd(wdir, 1024);

+			pm->wdir = emalloc(1024);

+			snprint(pm->wdir, 1024, "%s/%s", wdir, c);

+			cleanname(pm->wdir);

+			free(wdir);

+			free(c);

+			if((c = strrchr(pm->wdir, '/')) != nil)

+				*c = '\0';

+		}

+		pm->type = strdup("text");

+		if(p1 > p0)

+			pm->attr = nil;

+		else{

+			p = p0;

+			while(p0>0 && (i=filereadc(f, p0 - 1))!=' ' && i!='\t' && i!='\n')

+				p0--;

+			while(p1<f->nc && (i=filereadc(f, p1))!=' ' && i!='\t' && i!='\n')

+				p1++;

+			sprint(cbuf, "click=%ld", p-p0);

+			pm->attr = plumbunpackattr(cbuf);

+		}

+		if(p0==p1 || p1-p0>=BLOCKSIZE){

+			plumbfree(pm);

+			break;

+		}

+		setgenstr(f, p0, p1);

+		pm->data = Strtoc(&genstr);

+		pm->ndata = strlen(pm->data);

+		c = plumbpack(pm, &i);

+		if(c != 0){

+			outTs(Hplumb, i);

+			Write(1, c, i);

+			free(c);

+		}

+		plumbfree(pm);

+		break;

+

+	case Tmenucmd:

+		dprint((char*)inp);

+		break;

+

+	case Tmenucmdsend:

+		termlocked++;

+		str = tmpcstr((char*)inp);

+		Straddc(str, '\n');

+		loginsert(cmd, cmd->nc, str->s, str->n);

+		freetmpstr(str);

+		fileupdate(cmd, FALSE, TRUE);

+		cmd->dot.r.p1 = cmd->dot.r.p2 = cmd->nc;

+		telldot(cmd);

+		termcommand();

+		break;

+

+	case Texit:

+		exits(0);

+	}

+	return TRUE;

+}

+

+void

+snarf(File *f, Posn p1, Posn p2, Buffer *buf, int emptyok)

+{

+	Posn l;

+	int i, fd, n;

+	String *s;

+	char *cs;

+

+	if(!emptyok && p1==p2)

+		return;

+	bufreset(buf);

+	/* Stage through genbuf to avoid compaction problems (vestigial) */

+	if(p2 > f->nc){

+		fprint(2, "bad snarf addr p1=%ld p2=%ld f->nc=%d\n", p1, p2, f->nc); /*ZZZ should never happen, can remove */

+		p2 = f->nc;

+	}

+	fd = open("/dev/snarf", OWRITE);

+	if(fd < 0){

+		fprint(2, "snarf: %r\n");

+		return;

+	}

+	for(l=p1; l<p2; l+=i){

+		i = p2-l>BLOCKSIZE? BLOCKSIZE : p2-l;

+		bufread(f, l, genbuf, i);

+		s = tmprstr(genbuf, i);

+		cs = Strtoc(s);

+		n = strlen(cs);

+		if(write(fd, cs, n) != n)

+			fprint(2, "snarf: %r\n");

+		free(cs);

+		bufinsert(buf, buf->nc, s->s, i);

+	}

+	close(fd);

+}

+

+int

+inshort(void)

+{

+	ushort n;

+

+	n = inp[0] | (inp[1]<<8);

+	inp += 2;

+	return n;

+}

+

+long

+inlong(void)

+{

+	ulong n;

+

+	n = inp[0] | (inp[1]<<8) | (inp[2]<<16) | (inp[3]<<24);

+	inp += 4;

+	return n;

+}

+

+vlong

+invlong(void)

+{

+	vlong v;

+	

+	v = (inp[7]<<24) | (inp[6]<<16) | (inp[5]<<8) | inp[4];

+	v = (v<<16) | (inp[3]<<8) | inp[2];

+	v = (v<<16) | (inp[1]<<8) | inp[0];

+	inp += 8;

+	return v;

+}

+

+void

+setgenstr(File *f, Posn p0, Posn p1)

+{

+	if(p0 != p1){

+		if(p1-p0 >= TBLOCKSIZE)

+			error(Etoolong);

+		Strinsure(&genstr, p1-p0);

+		bufread(f, p0, genbuf, p1-p0);

+		memmove(genstr.s, genbuf, RUNESIZE*(p1-p0));

+		genstr.n = p1-p0;

+	}else{

+		if(snarfbuf.nc == 0)

+			error(Eempty);

+		if(snarfbuf.nc > TBLOCKSIZE)

+			error(Etoolong);

+		bufread(&snarfbuf, (Posn)0, genbuf, snarfbuf.nc);

+		Strinsure(&genstr, snarfbuf.nc);

+		memmove(genstr.s, genbuf, RUNESIZE*snarfbuf.nc);

+		genstr.n = snarfbuf.nc;

+	}

+}

+

+void

+outT0(Hmesg type)

+{

+	outstart(type);

+	outsend();

+}

+

+void

+outTl(Hmesg type, long l)

+{

+	outstart(type);

+	outlong(l);

+	outsend();

+}

+

+void

+outTs(Hmesg type, int s)

+{

+	outstart(type);

+	journaln(1, s);

+	outshort(s);

+	outsend();

+}

+

+void

+outS(String *s)

+{

+	char *c;

+	int i;

+

+	c = Strtoc(s);

+	i = strlen(c);

+	outcopy(i, c);

+	if(i > 99)

+		c[99] = 0;

+	journaln(1, i);

+	journal(1, c);

+	free(c);

+}

+

+void

+outTsS(Hmesg type, int s1, String *s)

+{

+	outstart(type);

+	outshort(s1);

+	outS(s);

+	outsend();

+}

+

+void

+outTslS(Hmesg type, int s1, Posn l1, String *s)

+{

+	outstart(type);

+	outshort(s1);

+	journaln(1, s1);

+	outlong(l1);

+	journaln(1, l1);

+	outS(s);

+	outsend();

+}

+

+void

+outTS(Hmesg type, String *s)

+{

+	outstart(type);

+	outS(s);

+	outsend();

+}

+

+void

+outTsllS(Hmesg type, int s1, Posn l1, Posn l2, String *s)

+{

+	outstart(type);

+	outshort(s1);

+	outlong(l1);

+	outlong(l2);

+	journaln(1, l1);

+	journaln(1, l2);

+	outS(s);

+	outsend();

+}

+

+void

+outTsll(Hmesg type, int s, Posn l1, Posn l2)

+{

+	outstart(type);

+	outshort(s);

+	outlong(l1);

+	outlong(l2);

+	journaln(1, l1);

+	journaln(1, l2);

+	outsend();

+}

+

+void

+outTsl(Hmesg type, int s, Posn l)

+{

+	outstart(type);

+	outshort(s);

+	outlong(l);

+	journaln(1, l);

+	outsend();

+}

+

+void

+outTsv(Hmesg type, int s, vlong v)

+{

+	outstart(type);

+	outshort(s);

+	outvlong(v);

+	journalv(1, v);

+	outsend();

+}

+

+void

+outstart(Hmesg type)

+{

+	journal(1, hname[type]);

+	outmsg[0] = type;

+	outp = outmsg+3;

+}

+

+void

+outcopy(int count, void *data)

+{

+	memmove(outp, data, count);

+	outp += count;

+}

+

+void

+outshort(int s)

+{

+	*outp++ = s;

+	*outp++ = s>>8; 

+}

+

+void

+outlong(long l)

+{

+	*outp++ = l;

+	*outp++ = l>>8;

+	*outp++ = l>>16;

+	*outp++ = l>>24;

+}

+

+void

+outvlong(vlong v)

+{

+	int i;

+

+	for(i = 0; i < 8; i++){

+		*outp++ = v;

+		v >>= 8;

+	}

+}

+

+void

+outsend(void)

+{

+	int outcount;

+

+	if(outp >= outdata+nelem(outdata))

+		panic("outsend");

+	outcount = outp-outmsg;

+	outcount -= 3;

+	outmsg[1] = outcount;

+	outmsg[2] = outcount>>8;

+	outmsg = outp;

+	if(!outbuffered){

+		outcount = outmsg-outdata;

+		if (write(1, (char*) outdata, outcount) != outcount)

+			rescue();

+		outmsg = outdata;

+		return;

+	}

+}

+

+int

+needoutflush(void)

+{

+	return outmsg >= outdata+DATASIZE;

+}

+

+void

+outflush(void)

+{

+	if(outmsg == outdata)

+		return;

+	outbuffered = 0;

+	/* flow control */

+	outT0(Hack);

+	waitack = 1;

+	do

+		if(rcv() == 0){

+			rescue();

+			exits("eof");

+		}

+	while(waitack);

+	outmsg = outdata;

+	outbuffered = 1;

+}

--- /dev/null

+++ b/sys/src/cmd/jam/mesg.h

@@ -1,0 +1,136 @@

+/* VERSION 1 introduces plumbing

+	2 increases SNARFSIZE from 4096 to 32000

+	3 adds a triple click

+ */

+#define	VERSION	3

+

+#define	TBLOCKSIZE 512		  /* largest piece of text sent to terminal */

+#define	DATASIZE  (UTFmax*TBLOCKSIZE+30) /* ... including protocol header stuff */

+#define	SNARFSIZE 32000		/* maximum length of exchanged snarf buffer, must fit in 15 bits */

+/*

+ * Messages originating at the terminal

+ */

+typedef enum Tmesg

+{

+	Tversion,	/* version */

+	Tstartcmdfile,	/* terminal just opened command frame */

+	Tcheck,		/* ask host to poke with Hcheck */

+	Trequest,	/* request data to fill a hole */

+	Torigin,	/* gimme an Horigin near here */

+	Tstartfile,	/* terminal just opened a file's frame */

+	Tworkfile,	/* set file to which commands apply */

+	Ttype,		/* add some characters, but terminal already knows */

+	Tcut,

+	Tpaste,

+	Tsnarf,

+	Tstartnewfile,	/* terminal just opened a new frame */

+	Twrite,		/* write file */

+	Tclose,		/* terminal requests file close; check mod. status */

+	Tlook,		/* search for literal current text */

+	Tsearch,	/* search for last regular expression */

+	Tsend,		/* pretend he typed stuff */

+	Tdclick,	/* double click */

+	Tstartsnarf,	/* initiate snarf buffer exchange */

+	Tsetsnarf,	/* remember string in snarf buffer */

+	Tack,		/* acknowledge Hack */

+	Texit,		/* exit */

+	Tplumb,		/* send plumb message */

+	Ttclick,	/* triple click */

+	Tmenucmd,	/* list custom cmds in b2 menu */

+	Tmenucmdsend,	/* execute custom cmd from b2 menu */

+	TMAX,

+}Tmesg;

+/*

+ * Messages originating at the host

+ */

+typedef enum Hmesg

+{

+	Hversion,	/* version */

+	Hbindname,	/* attach name[0] to text in terminal */

+	Hcurrent,	/* make named file the typing file */

+	Hnewname,	/* create "" name in menu */

+	Hmovname,	/* move file name in menu */

+	Hgrow,		/* insert space in rasp */

+	Hcheck0,	/* see below */

+	Hcheck,		/* ask terminal to check whether it needs more data */

+	Hunlock,	/* command is finished; user can do things */

+	Hdata,		/* store this data in previously allocated space */

+	Horigin,	/* set origin of file/frame in terminal */

+	Hunlockfile,	/* unlock file in terminal */

+	Hsetdot,	/* set dot in terminal */

+	Hgrowdata,	/* Hgrow + Hdata folded together */

+	Hmoveto,	/* scrolling, context search, etc. */

+	Hclean,		/* named file is now 'clean' */

+	Hdirty,		/* named file is now 'dirty' */

+	Hcut,		/* remove space from rasp */

+	Hsetpat,	/* set remembered regular expression */

+	Hdelname,	/* delete file name from menu */

+	Hclose,		/* close file and remove from menu */

+	Hsetsnarf,	/* remember string in snarf buffer */

+	Hsnarflen,	/* report length of implicit snarf */

+	Hack,		/* request acknowledgement */

+	Hexit,

+	Hplumb,		/* return plumb message to terminal - version 1 */

+	Hmenucmd,	/* modify custom cmds in b2 menu */

+	HMAX,

+}Hmesg;

+typedef struct Header{

+	uchar	type;		/* one of the above */

+	uchar	count0;		/* low bits of data size */

+	uchar	count1;		/* high bits of data size */

+	uchar	data[1];	/* variable size */

+}Header;

+

+/*

+ * File transfer protocol schematic, a la Holzmann

+ * #define N	6

+ * 

+ * chan h = [4] of { mtype };

+ * chan t = [4] of { mtype };

+ * 

+ * mtype = {	Hgrow, Hdata,

+ * 		Hcheck, Hcheck0,

+ * 		Trequest, Tcheck,

+ * 	};

+ * 

+ * active proctype host()

+ * {	byte n;

+ * 

+ * 	do

+ * 	:: n <  N -> n++; t!Hgrow

+ * 	:: n == N -> n++; t!Hcheck0

+ * 

+ * 	:: h?Trequest -> t!Hdata

+ * 	:: h?Tcheck   -> t!Hcheck

+ * 	od

+ * }

+ * 

+ * active proctype term()

+ * {

+ * 	do

+ * 	:: t?Hgrow   -> h!Trequest

+ * 	:: t?Hdata   -> skip

+ * 	:: t?Hcheck0 -> h!Tcheck

+ * 	:: t?Hcheck  ->

+ * 		if

+ * 		:: h!Trequest -> progress: h!Tcheck

+ * 		:: break

+ * 		fi

+ * 	od;

+ * 	printf("term exits\n")

+ * }

+ *

+ * From: gerard@research.bell-labs.com

+ * Date: Tue Jul 17 13:47:23 EDT 2001

+ * To: rob@research.bell-labs.com

+ * 

+ * spin -c 	(or -a) spec

+ * pcc -DNP -o pan pan.c

+ * pan -l

+ * 

+ * proves that there are no non-progress cycles

+ * (infinite executions *not* passing through

+ * the statement marked with a label starting

+ * with the prefix "progress")

+ * 

+ */

--- /dev/null

+++ b/sys/src/cmd/jam/mkfile

@@ -1,0 +1,40 @@

+</$objtype/mkfile

+

+TARG=jam

+OFILES=sam.$O\

+	address.$O\

+	buff.$O\

+	cmd.$O\

+	disk.$O\

+	error.$O\

+	file.$O\

+	io.$O\

+	list.$O\

+	mesg.$O\

+	moveto.$O\

+	multi.$O\

+	plan9.$O\

+	rasp.$O\

+	regexp.$O\

+	shell.$O\

+	string.$O\

+	sys.$O\

+	util.$O\

+	xec.$O\

+

+HFILES=sam.h\

+	errors.h\

+	mesg.h\

+

+BIN=/$objtype/bin

+

+UPDATE=\

+	mkfile\

+	parse.h\

+	$HFILES\

+	${OFILES:%.$O=%.c}\

+

+</sys/src/cmd/mkone

+

+address.$O cmd.$O parse.$O xec.$O unix.$O:	parse.h

+

--- /dev/null

+++ b/sys/src/cmd/jam/moveto.c

@@ -1,0 +1,193 @@

+#include "sam.h"

+

+void

+moveto(File *f, Range r)

+{

+	Posn p1 = r.p1, p2 = r.p2;

+

+	f->dot.r.p1 = p1;

+	f->dot.r.p2 = p2;

+	if(f->rasp){

+		telldot(f);

+		outTsl(Hmoveto, f->tag, f->dot.r.p1);

+	}

+}

+

+void

+telldot(File *f)

+{

+	if(f->rasp == 0)

+		panic("telldot");

+	if(f->dot.r.p1==f->tdot.p1 && f->dot.r.p2==f->tdot.p2)

+		return;

+	outTsll(Hsetdot, f->tag, f->dot.r.p1, f->dot.r.p2);

+	f->tdot = f->dot.r;

+}

+

+void

+tellpat(void)

+{

+	outTS(Hsetpat, &lastpat);

+	patset = FALSE;

+}

+

+#define	CHARSHIFT	128

+

+void

+lookorigin(File *f, Posn p0, Posn ls)

+{

+	int nl, nc, c;

+	Posn p, oldp0;

+

+	if(p0 > f->nc)

+		p0 = f->nc;

+	oldp0 = p0;

+	p = p0;

+	for(nl=nc=c=0; c!=-1 && nl<ls && nc<ls*CHARSHIFT; nc++)

+		if((c=filereadc(f, --p)) == '\n'){

+			nl++;

+			oldp0 = p0-nc;

+		}

+	if(c == -1)

+		p0 = 0;

+	else if(nl==0){

+		if(p0>=CHARSHIFT/2)

+			p0-=CHARSHIFT/2;

+		else

+			p0 = 0;

+	}else

+		p0 = oldp0;

+	outTsl(Horigin, f->tag, p0);

+}

+

+int

+isalnum(int c)

+{

+	/*

+	 * Hard to get absolutely right.  Use what we know about ASCII

+	 * and assume anything above the Latin control characters is

+	 * potentially an alphanumeric.

+	 */

+	if(c<=' ')

+		return 0;

+	if(0x7F<=c && c<=0xA0)

+		return 0;

+	if(utfrune("!\"#$%&'()*+,-./:;<=>?@[\\]^`{|}~", c))

+		return 0;

+	return 1;

+}

+

+int

+isspace(Rune c)

+{

+	return c == 0 || c == ' ' || c == '\t' ||

+		c == '\n' || c == '\r' || c == '\v';

+}

+

+int

+inmode(Rune r, int mode)

+{

+	return (mode == 0) ? isalnum(r) : r && !isspace(r);

+}

+

+int

+clickmatch(File *f, int cl, int cr, int dir, Posn *p)

+{

+	int c;

+	int nest = 1;

+

+	for(;;){

+		if(dir > 0){

+			if(*p >= f->nc)

+				break;

+			c = filereadc(f, (*p)++);

+		}else{

+			if(*p == 0)

+				break;

+			c = filereadc(f, --(*p));

+		}

+		if(c == cr){

+			if(--nest==0)

+				return 1;

+		}else if(c == cl)

+			nest++;

+	}

+	return cl=='\n' && nest==1;

+}

+

+Rune*

+strrune(Rune *s, Rune c)

+{

+	Rune c1;

+

+	if(c == 0) {

+		while(*s++)

+			;

+		return s-1;

+	}

+

+	while(c1 = *s++)

+		if(c1 == c)

+			return s-1;

+	return 0;

+}

+

+/*

+ * Stretches a selection out over current text,

+ * selecting matching range if possible.

+ * If there's no matching range, mode 0 selects

+ * a single alphanumeric region. Mode 1 selects

+ * a non-whitespace region.

+ */

+void

+stretchsel(File *f, Posn p1, int mode)

+{

+	int c, i;

+	Rune *r, *l;

+	Posn p;

+

+	if(p1 > f->nc)

+		return;

+	f->dot.r.p1 = f->dot.r.p2 = p1;

+	for(i=0; left[i]; i++){

+		l = left[i];

+		r = right[i];

+		/* try left match */

+		p = p1;

+		if(p1 == 0)

+			c = '\n';

+		else

+			c = filereadc(f, p - 1);

+		if(strrune(l, c)){

+			if(clickmatch(f, c, r[strrune(l, c)-l], 1, &p)){

+				f->dot.r.p1 = p1;

+				f->dot.r.p2 = p-(c!='\n');

+			}

+			return;

+		}

+		/* try right match */

+		p = p1;

+		if(p1 == f->nc)

+			c = '\n';

+		else

+			c = filereadc(f, p);

+		if(strrune(r, c)){

+			if(clickmatch(f, c, l[strrune(r, c)-r], -1, &p)){

+				f->dot.r.p1 = p;

+				if(c!='\n' || p!=0 || filereadc(f, 0)=='\n')

+					f->dot.r.p1++;

+				f->dot.r.p2 = p1+(p1<f->nc && c=='\n');

+			}

+			return;

+		}

+	}

+	/* try filling out word to right */

+	p = p1;

+	while(p < f->nc && inmode(filereadc(f, p++), mode))

+		f->dot.r.p2++;

+	/* try filling out word to left */

+	p = p1;

+	while(--p >= 0 && inmode(filereadc(f, p), mode))

+		f->dot.r.p1--;

+}

+

--- /dev/null

+++ b/sys/src/cmd/jam/multi.c

@@ -1,0 +1,123 @@

+#include "sam.h"

+

+List	file = { 'p' };

+ushort	tag;

+

+File *

+newfile(void)

+{

+	File *f;

+

+	f = fileopen();

+	inslist(&file, 0, f);

+	f->tag = tag++;

+	if(downloaded)

+		outTs(Hnewname, f->tag);

+	/* already sorted; file name is "" */

+	return f;

+}

+

+int

+whichmenu(File *f)

+{

+	int i;

+

+	for(i=0; i<file.nused; i++)

+		if(file.filepptr[i]==f)

+			return i;

+	return -1;

+}

+

+void

+delfile(File *f)

+{

+	int w = whichmenu(f);

+

+	if(w < 0)	/* e.g. x/./D */

+		return;

+	if(downloaded)

+		outTs(Hdelname, f->tag);

+	dellist(&file, w);

+	fileclose(f);

+}

+

+void

+fullname(String *name)

+{

+	if(name->n > 0 && name->s[0]!='/' && name->s[0]!=0)

+		Strinsert(name, &curwd, (Posn)0);

+}

+

+void

+fixname(String *name)

+{

+	String *t;

+	char *s;

+

+	fullname(name);

+	s = Strtoc(name);

+	if(strlen(s) > 0)

+		s = cleanname(s);

+	t = tmpcstr(s);

+	Strduplstr(name, t);

+	free(s);

+	freetmpstr(t);

+

+	if(Strispre(&curwd, name))

+		Strdelete(name, 0, curwd.n);

+}

+

+void

+sortname(File *f)

+{

+	int i, cmp, w;

+	int dupwarned;

+

+	w = whichmenu(f);

+	dupwarned = FALSE;

+	dellist(&file, w);

+	if(f == cmd)

+		i = 0;

+	else{

+		for(i=0; i<file.nused; i++){

+			cmp = Strcmp(&f->name, &file.filepptr[i]->name);

+			if(cmp==0 && !dupwarned){

+				dupwarned = TRUE;

+				warn_S(Wdupname, &f->name);

+			}else if(cmp<0 && (i>0 || cmd==0))

+				break;

+		}

+	}

+	inslist(&file, i, f);

+	if(downloaded)

+		outTsS(Hmovname, f->tag, &f->name);

+}

+

+void

+state(File *f, int cleandirty)

+{

+	if(f == cmd)

+		return;

+	f->unread = FALSE;

+	if(downloaded && whichmenu(f)>=0){	/* else flist or menu */

+		if(f->mod && cleandirty!=Dirty)

+			outTs(Hclean, f->tag);

+		else if(!f->mod && cleandirty==Dirty)

+			outTs(Hdirty, f->tag);

+	}

+	if(cleandirty == Clean)

+		f->mod = FALSE;

+	else

+		f->mod = TRUE;

+}

+

+File *

+lookfile(String *s)

+{

+	int i;

+

+	for(i=0; i<file.nused; i++)

+		if(Strcmp(&file.filepptr[i]->name, s) == 0)

+			return file.filepptr[i];

+	return 0;

+}

--- /dev/null

+++ b/sys/src/cmd/jam/parse.h

@@ -1,0 +1,71 @@

+typedef struct Addr Addr;

+typedef struct Cmd Cmd;

+struct Addr

+{

+	char	type;	/* # (char addr), l (line addr), / ? . $ + - , ; */

+	union{

+		String	*re;

+		Addr	*aleft;		/* left side of , and ; */

+	} g;

+	Posn	num;

+	Addr	*next;			/* or right side of , and ; */

+};

+

+#define	are	g.re

+#define	left	g.aleft

+

+struct Cmd

+{

+	Addr	*addr;			/* address (range of text) */

+	String	*re;			/* regular expression for e.g. 'x' */

+	union{

+		Cmd	*cmd;		/* target of x, g, {, etc. */

+		String	*text;		/* text of a, c, i; rhs of s */

+		Addr	*addr;		/* address for m, t */

+	} g;

+	Cmd	*next;			/* pointer to next element in {} */

+	short	num;

+	ushort	flag;			/* whatever */

+	ushort	cmdc;			/* command character; 'x' etc. */

+};

+

+#define	ccmd	g.cmd

+#define	ctext	g.text

+#define	caddr	g.addr

+

+typedef struct Cmdtab Cmdtab;

+struct Cmdtab

+{

+	ushort	cmdc;		/* command character */

+	uchar	text;		/* takes a textual argument? */

+	uchar	regexp;		/* takes a regular expression? */

+	uchar	addr;		/* takes an address (m or t)? */

+	uchar	defcmd;		/* default command; 0==>none */

+	uchar	defaddr;	/* default address */

+	uchar	count;		/* takes a count e.g. s2/// */

+	char	*token;		/* takes text terminated by one of these */

+	int	(*fn)(File*, Cmd*);	/* function to call with parse tree */

+}cmdtab[];

+

+enum Defaddr{	/* default addresses */

+	aNo,

+	aDot,

+	aAll,

+};

+

+int	nl_cmd(File*, Cmd*), a_cmd(File*, Cmd*), b_cmd(File*, Cmd*);

+int	c_cmd(File*, Cmd*), cd_cmd(File*, Cmd*), d_cmd(File*, Cmd*);

+int	D_cmd(File*, Cmd*), e_cmd(File*, Cmd*);

+int	f_cmd(File*, Cmd*), g_cmd(File*, Cmd*), i_cmd(File*, Cmd*);

+int	k_cmd(File*, Cmd*), m_cmd(File*, Cmd*);

+int	M_cmd(File*, Cmd*), n_cmd(File*, Cmd*);

+int	p_cmd(File*, Cmd*), q_cmd(File*, Cmd*);

+int	s_cmd(File*, Cmd*), u_cmd(File*, Cmd*), w_cmd(File*, Cmd*);

+int	x_cmd(File*, Cmd*), X_cmd(File*, Cmd*), plan9_cmd(File*, Cmd*);

+int	eq_cmd(File*, Cmd*);

+

+

+String	*getregexp(int);

+Addr	*newaddr(void);

+Address	address(Addr*, Address, int);

+int	cmdexec(File*, Cmd*);

--- /dev/null

+++ b/sys/src/cmd/jam/plan9.acid

@@ -1,0 +1,817 @@

+sizeof_1_ = 8;

+aggr _1_

+{

+	'U' 0 lo;

+	'U' 4 hi;

+};

+

+defn

+_1_(addr) {

+	complex _1_ addr;

+	print("	lo	", addr.lo, "\n");

+	print("	hi	", addr.hi, "\n");

+};

+

+sizeofFPdbleword = 8;

+aggr FPdbleword

+{

+	'F' 0 x;

+	{

+	'U' 0 lo;

+	'U' 4 hi;

+	};

+};

+

+defn

+FPdbleword(addr) {

+	complex FPdbleword addr;

+	print("	x	", addr.x, "\n");

+	print("_1_ {\n");

+		_1_(addr+0);

+	print("}\n");

+};

+

+UTFmax = 4;

+Runesync = 128;

+Runeself = 128;

+Runeerror = 65533;

+Runemax = 1114111;

+Runemask = 2097151;

+sizeofFmt = 80;

+aggr Fmt

+{

+	'b' 0 runes;

+	'Y' 8 start;

+	'Y' 16 to;

+	'Y' 24 stop;

+	'Y' 32 flush;

+	'Y' 40 farg;

+	'D' 48 nfmt;

+	'Y' 56 args;

+	'D' 64 r;

+	'D' 68 width;

+	'D' 72 prec;

+	'U' 76 flags;

+};

+

+defn

+Fmt(addr) {

+	complex Fmt addr;

+	print("	runes	", addr.runes, "\n");

+	print("	start	", addr.start\Y, "\n");

+	print("	to	", addr.to\Y, "\n");

+	print("	stop	", addr.stop\Y, "\n");

+	print("	flush	", addr.flush\Y, "\n");

+	print("	farg	", addr.farg\Y, "\n");

+	print("	nfmt	", addr.nfmt, "\n");

+	print("	args	", addr.args\Y, "\n");

+	print("	r	", addr.r, "\n");

+	print("	width	", addr.width, "\n");

+	print("	prec	", addr.prec, "\n");

+	print("	flags	", addr.flags, "\n");

+};

+

+FmtWidth = 1;

+FmtLeft = 2;

+FmtPrec = 4;

+FmtSharp = 8;

+FmtSpace = 16;

+FmtSign = 32;

+FmtZero = 64;

+FmtUnsigned = 128;

+FmtShort = 256;

+FmtLong = 512;

+FmtVLong = 1024;

+FmtComma = 2048;

+FmtByte = 4096;

+FmtFlag = 8192;

+sizeofTm = 64;

+aggr Tm

+{

+	'D' 0 nsec;

+	'D' 4 sec;

+	'D' 8 min;

+	'D' 12 hour;

+	'D' 16 mday;

+	'D' 20 mon;

+	'D' 24 year;

+	'D' 28 wday;

+	'D' 32 yday;

+	'a' 36 zone;

+	'D' 52 tzoff;

+	'Y' 56 tz;

+};

+

+defn

+Tm(addr) {

+	complex Tm addr;

+	print("	nsec	", addr.nsec, "\n");

+	print("	sec	", addr.sec, "\n");

+	print("	min	", addr.min, "\n");

+	print("	hour	", addr.hour, "\n");

+	print("	mday	", addr.mday, "\n");

+	print("	mon	", addr.mon, "\n");

+	print("	year	", addr.year, "\n");

+	print("	wday	", addr.wday, "\n");

+	print("	yday	", addr.yday, "\n");

+	print("	zone	", addr.zone, "\n");

+	print("	tzoff	", addr.tzoff, "\n");

+	print("	tz	", addr.tz\Y, "\n");

+};

+

+sizeofTmfmt = 16;

+aggr Tmfmt

+{

+	'Y' 0 fmt;

+	'A' Tm 8 tm;

+};

+

+defn

+Tmfmt(addr) {

+	complex Tmfmt addr;

+	print("	fmt	", addr.fmt\Y, "\n");

+	print("	tm	", addr.tm\Y, "\n");

+};

+

+PNPROC = 1;

+PNGROUP = 2;

+Profoff = 0;

+Profuser = 1;

+Profkernel = 2;

+Proftime = 3;

+Profsample = 4;

+sizeofLock = 8;

+aggr Lock

+{

+	'D' 0 val;

+};

+

+defn

+Lock(addr) {

+	complex Lock addr;

+	print("	val	", addr.val, "\n");

+};

+

+sizeofQLp = 16;

+aggr QLp

+{

+	'D' 0 inuse;

+	'D' 4 state;

+	'A' QLp 8 next;

+};

+

+defn

+QLp(addr) {

+	complex QLp addr;

+	print("	inuse	", addr.inuse, "\n");

+	print("	state	", addr.state, "\n");

+	print("	next	", addr.next\Y, "\n");

+};

+

+sizeofQLock = 32;

+aggr QLock

+{

+	Lock 0 lock;

+	'D' 8 locked;

+	'A' QLp 16 $head;

+	'A' QLp 24 $tail;

+};

+

+defn

+QLock(addr) {

+	complex QLock addr;

+	print("Lock lock {\n");

+	Lock(addr.lock);

+	print("}\n");

+	print("	locked	", addr.locked, "\n");

+	print("	$head	", addr.$head\Y, "\n");

+	print("	$tail	", addr.$tail\Y, "\n");

+};

+

+sizeofRWLock = 32;

+aggr RWLock

+{

+	Lock 0 lock;

+	'D' 8 readers;

+	'D' 12 writer;

+	'A' QLp 16 $head;

+	'A' QLp 24 $tail;

+};

+

+defn

+RWLock(addr) {

+	complex RWLock addr;

+	print("Lock lock {\n");

+	Lock(addr.lock);

+	print("}\n");

+	print("	readers	", addr.readers, "\n");

+	print("	writer	", addr.writer, "\n");

+	print("	$head	", addr.$head\Y, "\n");

+	print("	$tail	", addr.$tail\Y, "\n");

+};

+

+sizeofRendez = 24;

+aggr Rendez

+{

+	'A' QLock 0 l;

+	'A' QLp 8 $head;

+	'A' QLp 16 $tail;

+};

+

+defn

+Rendez(addr) {

+	complex Rendez addr;

+	print("	l	", addr.l\Y, "\n");

+	print("	$head	", addr.$head\Y, "\n");

+	print("	$tail	", addr.$tail\Y, "\n");

+};

+

+sizeofNetConnInfo = 72;

+aggr NetConnInfo

+{

+	'Y' 0 dir;

+	'Y' 8 root;

+	'Y' 16 spec;

+	'Y' 24 lsys;

+	'Y' 32 lserv;

+	'Y' 40 rsys;

+	'Y' 48 rserv;

+	'Y' 56 laddr;

+	'Y' 64 raddr;

+};

+

+defn

+NetConnInfo(addr) {

+	complex NetConnInfo addr;

+	print("	dir	", addr.dir\Y, "\n");

+	print("	root	", addr.root\Y, "\n");

+	print("	spec	", addr.spec\Y, "\n");

+	print("	lsys	", addr.lsys\Y, "\n");

+	print("	lserv	", addr.lserv\Y, "\n");

+	print("	rsys	", addr.rsys\Y, "\n");

+	print("	rserv	", addr.rserv\Y, "\n");

+	print("	laddr	", addr.laddr\Y, "\n");

+	print("	raddr	", addr.raddr\Y, "\n");

+};

+

+RFNAMEG = 1;

+RFENVG = 2;

+RFFDG = 4;

+RFNOTEG = 8;

+RFPROC = 16;

+RFMEM = 32;

+RFNOWAIT = 64;

+RFCNAMEG = 1024;

+RFCENVG = 2048;

+RFCFDG = 4096;

+RFREND = 8192;

+RFNOMNT = 16384;

+sizeofQid = 16;

+aggr Qid

+{

+	'W' 0 path;

+	'U' 8 vers;

+	'b' 12 type;

+};

+

+defn

+Qid(addr) {

+	complex Qid addr;

+	print("	path	", addr.path, "\n");

+	print("	vers	", addr.vers, "\n");

+	print("	type	", addr.type, "\n");

+};

+

+sizeofDir = 80;

+aggr Dir

+{

+	'u' 0 type;

+	'U' 4 dev;

+	Qid 8 qid;

+	'U' 24 mode;

+	'U' 28 atime;

+	'U' 32 mtime;

+	'V' 40 length;

+	'Y' 48 name;

+	'Y' 56 uid;

+	'Y' 64 gid;

+	'Y' 72 muid;

+};

+

+defn

+Dir(addr) {

+	complex Dir addr;

+	print("	type	", addr.type, "\n");

+	print("	dev	", addr.dev, "\n");

+	print("Qid qid {\n");

+	Qid(addr.qid);

+	print("}\n");

+	print("	mode	", addr.mode, "\n");

+	print("	atime	", addr.atime, "\n");

+	print("	mtime	", addr.mtime, "\n");

+	print("	length	", addr.length, "\n");

+	print("	name	", addr.name\Y, "\n");

+	print("	uid	", addr.uid\Y, "\n");

+	print("	gid	", addr.gid\Y, "\n");

+	print("	muid	", addr.muid\Y, "\n");

+};

+

+sizeofWaitmsg = 24;

+aggr Waitmsg

+{

+	'D' 0 pid;

+	'a' 4 time;

+	'Y' 16 msg;

+};

+

+defn

+Waitmsg(addr) {

+	complex Waitmsg addr;

+	print("	pid	", addr.pid, "\n");

+	print("	time	", addr.time, "\n");

+	print("	msg	", addr.msg\Y, "\n");

+};

+

+sizeofIOchunk = 16;

+aggr IOchunk

+{

+	'Y' 0 addr;

+	'U' 8 len;

+};

+

+defn

+IOchunk(addr) {

+	complex IOchunk addr;

+	print("	addr	", addr.addr\Y, "\n");

+	print("	len	", addr.len, "\n");

+};

+

+sizeofPlumbmsg = 56;

+aggr Plumbmsg

+{

+	'Y' 0 src;

+	'Y' 8 dst;

+	'Y' 16 wdir;

+	'Y' 24 type;

+	'Y' 32 attr;

+	'D' 40 ndata;

+	'Y' 48 data;

+};

+

+defn

+Plumbmsg(addr) {

+	complex Plumbmsg addr;

+	print("	src	", addr.src\Y, "\n");

+	print("	dst	", addr.dst\Y, "\n");

+	print("	wdir	", addr.wdir\Y, "\n");

+	print("	type	", addr.type\Y, "\n");

+	print("	attr	", addr.attr\Y, "\n");

+	print("	ndata	", addr.ndata, "\n");

+	print("	data	", addr.data\Y, "\n");

+};

+

+sizeofPlumbattr = 24;

+aggr Plumbattr

+{

+	'Y' 0 name;

+	'Y' 8 value;

+	'A' Plumbattr 16 next;

+};

+

+defn

+Plumbattr(addr) {

+	complex Plumbattr addr;

+	print("	name	", addr.name\Y, "\n");

+	print("	value	", addr.value\Y, "\n");

+	print("	next	", addr.next\Y, "\n");

+};

+

+Eopen = 0;

+Ecreate = 1;

+Emenu = 2;

+Emodified = 3;

+Eio = 4;

+Ewseq = 5;

+Eunk = 6;

+Emissop = 7;

+Edelim = 8;

+Efork = 9;

+Eintr = 10;

+Eaddress = 11;

+Esearch = 12;

+Epattern = 13;

+Enewline = 14;

+Eblank = 15;

+Enopattern = 16;

+EnestXY = 17;

+Enolbrace = 18;

+Enoaddr = 19;

+Eoverlap = 20;

+Enosub = 21;

+Elongrhs = 22;

+Ebadrhs = 23;

+Erange = 24;

+Esequence = 25;

+Eorder = 26;

+Enoname = 27;

+Eleftpar = 28;

+Erightpar = 29;

+Ebadclass = 30;

+Ebadregexp = 31;

+Eoverflow = 32;

+Enocmd = 33;

+Epipe = 34;

+Enofile = 35;

+Etoolong = 36;

+Echanges = 37;

+Eempty = 38;

+Efsearch = 39;

+Emanyfiles = 40;

+Elongtag = 41;

+Esubexp = 42;

+Etmpovfl = 43;

+Eappend = 44;

+Ecantplumb = 45;

+Ebufload = 46;

+Wdupname = 0;

+Wfile = 1;

+Wdate = 2;

+Wdupfile = 3;

+Wnulls = 4;

+Wpwd = 5;

+Wnotnewline = 6;

+Wbadstatus = 7;

+Clean = 32;

+Dirty = 39;

+Unread = 45;

+sizeofRange = 8;

+aggr Range

+{

+	'D' 0 p1;

+	'D' 4 p2;

+};

+

+defn

+Range(addr) {

+	complex Range addr;

+	print("	p1	", addr.p1, "\n");

+	print("	p2	", addr.p2, "\n");

+};

+

+sizeofRangeset = 80;

+aggr Rangeset

+{

+	'a' 0 p;

+};

+

+defn

+Rangeset(addr) {

+	complex Rangeset addr;

+	print("	p	", addr.p, "\n");

+};

+

+sizeofAddress = 16;

+aggr Address

+{

+	Range 0 r;

+	'Y' 8 f;

+};

+

+defn

+Address(addr) {

+	complex Address addr;

+	print("Range r {\n");

+	Range(addr.r);

+	print("}\n");

+	print("	f	", addr.f\Y, "\n");

+};

+

+sizeofString = 16;

+aggr String

+{

+	'd' 0 n;

+	'd' 2 size;

+	'Y' 8 s;

+};

+

+defn

+String(addr) {

+	complex String addr;

+	print("	n	", addr.n, "\n");

+	print("	size	", addr.size, "\n");

+	print("	s	", addr.s\Y, "\n");

+};

+

+sizeof_2_ = 8;

+aggr _2_

+{

+	'Y' 0 listp;

+	'Y' 0 voidp;

+	'Y' 0 posnp;

+	'A' String 0 stringp;

+	'Y' 0 filep;

+};

+

+defn

+_2_(addr) {

+	complex _2_ addr;

+	print("	listp	", addr.listp\Y, "\n");

+	print("	voidp	", addr.voidp\Y, "\n");

+	print("	posnp	", addr.posnp\Y, "\n");

+	print("	stringp	", addr.stringp\Y, "\n");

+	print("	filep	", addr.filep\Y, "\n");

+};

+

+sizeofList = 24;

+aggr List

+{

+	'D' 0 type;

+	'D' 4 nalloc;

+	'D' 8 nused;

+	_2_ 16 g;

+};

+

+defn

+List(addr) {

+	complex List addr;

+	print("	type	", addr.type, "\n");

+	print("	nalloc	", addr.nalloc, "\n");

+	print("	nused	", addr.nused, "\n");

+	print("_2_ g {\n");

+	_2_(addr.g);

+	print("}\n");

+};

+

+Blockincr = 256;

+Maxblock = 8192;

+BUFSIZE = 8192;

+RBUFSIZE = 2048;

+Null = 45;

+Delete = 100;

+Insert = 105;

+Filename = 102;

+Dot = 68;

+Mark = 109;

+sizeof_3_ = 8;

+aggr _3_

+{

+	'U' 0 n;

+	'Y' 0 next;

+};

+

+defn

+_3_(addr) {

+	complex _3_ addr;

+	print("	n	", addr.n, "\n");

+	print("	next	", addr.next\Y, "\n");

+};

+

+sizeofBlock = 16;

+aggr Block

+{

+	'U' 0 addr;

+	{

+	'U' 8 n;

+	'A' Block 8 next;

+	};

+};

+

+defn

+Block(addr) {

+	complex Block addr;

+	print("	addr	", addr.addr, "\n");

+	print("_3_ {\n");

+		_3_(addr+8);

+	print("}\n");

+};

+

+sizeofDisk = 280;

+aggr Disk

+{

+	'D' 0 fd;

+	'V' 8 addr;

+	'a' 16 free;

+};

+

+defn

+Disk(addr) {

+	complex Disk addr;

+	print("	fd	", addr.fd, "\n");

+	print("	addr	", addr.addr, "\n");

+	print("	free	", addr.free, "\n");

+};

+

+sizeofBuffer = 56;

+aggr Buffer

+{

+	'U' 0 nc;

+	'Y' 8 c;

+	'U' 16 cnc;

+	'U' 20 cmax;

+	'U' 24 cq;

+	'D' 28 cdirty;

+	'U' 32 cbi;

+	'A' Block 40 bl;

+	'U' 48 nbl;

+};

+

+defn

+Buffer(addr) {

+	complex Buffer addr;

+	print("	nc	", addr.nc, "\n");

+	print("	c	", addr.c\Y, "\n");

+	print("	cnc	", addr.cnc, "\n");

+	print("	cmax	", addr.cmax, "\n");

+	print("	cq	", addr.cq, "\n");

+	print("	cdirty	", addr.cdirty, "\n");

+	print("	cbi	", addr.cbi, "\n");

+	print("	bl	", addr.bl\Y, "\n");

+	print("	nbl	", addr.nbl, "\n");

+};

+

+sizeofFile = 312;

+aggr File

+{

+	{

+	'U' 0 nc;

+	'Y' 8 c;

+	'U' 16 cnc;

+	'U' 20 cmax;

+	'U' 24 cq;

+	'D' 28 cdirty;

+	'U' 32 cbi;

+	'A' Block 40 bl;

+	'U' 48 nbl;

+	};

+	Buffer 56 delta;

+	Buffer 112 epsilon;

+	String 168 name;

+	'W' 184 qidpath;

+	'U' 192 mtime;

+	'D' 196 dev;

+	'D' 200 unread;

+	'D' 204 seq;

+	'D' 208 cleanseq;

+	'D' 212 mod;

+	'C' 216 rescuing;

+	'D' 220 hiposn;

+	Address 224 dot;

+	Address 240 ndot;

+	Range 256 tdot;

+	Range 264 mark;

+	'A' List 272 rasp;

+	'd' 280 tag;

+	'C' 282 closeok;

+	'C' 283 deleted;

+	Range 288 prevdot;

+	Range 296 prevmark;

+	'D' 304 prevseq;

+	'D' 308 prevmod;

+};

+

+defn

+File(addr) {

+	complex File addr;

+	print("Buffer {\n");

+		Buffer(addr+0);

+	print("}\n");

+	print("Buffer delta {\n");

+	Buffer(addr.delta);

+	print("}\n");

+	print("Buffer epsilon {\n");

+	Buffer(addr.epsilon);

+	print("}\n");

+	print("String name {\n");

+	String(addr.name);

+	print("}\n");

+	print("	qidpath	", addr.qidpath, "\n");

+	print("	mtime	", addr.mtime, "\n");

+	print("	dev	", addr.dev, "\n");

+	print("	unread	", addr.unread, "\n");

+	print("	seq	", addr.seq, "\n");

+	print("	cleanseq	", addr.cleanseq, "\n");

+	print("	mod	", addr.mod, "\n");

+	print("	rescuing	", addr.rescuing, "\n");

+	print("	hiposn	", addr.hiposn, "\n");

+	print("Address dot {\n");

+	Address(addr.dot);

+	print("}\n");

+	print("Address ndot {\n");

+	Address(addr.ndot);

+	print("}\n");

+	print("Range tdot {\n");

+	Range(addr.tdot);

+	print("}\n");

+	print("Range mark {\n");

+	Range(addr.mark);

+	print("}\n");

+	print("	rasp	", addr.rasp\Y, "\n");

+	print("	tag	", addr.tag, "\n");

+	print("	closeok	", addr.closeok, "\n");

+	print("	deleted	", addr.deleted, "\n");

+	print("Range prevdot {\n");

+	Range(addr.prevdot);

+	print("}\n");

+	print("Range prevmark {\n");

+	Range(addr.prevmark);

+	print("}\n");

+	print("	prevseq	", addr.prevseq, "\n");

+	print("	prevmod	", addr.prevmod, "\n");

+};

+

+complex Disk disk;

+complex Address addr;

+complex Buffer snarfbuf;

+complex Buffer plan9buf;

+complex Buffer cmdbuf;

+complex List file;

+complex List tempfile;

+complex File cmd;

+complex File curfile;

+complex File lastfile;

+complex Rangeset sel;

+complex String curwd;

+complex String cmdstr;

+complex String genstr;

+complex String lastpat;

+complex String lastregexp;

+complex String plan9cmd;

+Tversion = 0;

+Tstartcmdfile = 1;

+Tcheck = 2;

+Trequest = 3;

+Torigin = 4;

+Tstartfile = 5;

+Tworkfile = 6;

+Ttype = 7;

+Tcut = 8;

+Tpaste = 9;

+Tsnarf = 10;

+Tstartnewfile = 11;

+Twrite = 12;

+Tclose = 13;

+Tlook = 14;

+Tsearch = 15;

+Tsend = 16;

+Tdclick = 17;

+Tstartsnarf = 18;

+Tsetsnarf = 19;

+Tack = 20;

+Texit = 21;

+Tplumb = 22;

+Ttclick = 23;

+Tmenucmd = 24;

+Tmenucmdsend = 25;

+TMAX = 26;

+Hversion = 0;

+Hbindname = 1;

+Hcurrent = 2;

+Hnewname = 3;

+Hmovname = 4;

+Hgrow = 5;

+Hcheck0 = 6;

+Hcheck = 7;

+Hunlock = 8;

+Hdata = 9;

+Horigin = 10;

+Hunlockfile = 11;

+Hsetdot = 12;

+Hgrowdata = 13;

+Hmoveto = 14;

+Hclean = 15;

+Hdirty = 16;

+Hcut = 17;

+Hsetpat = 18;

+Hdelname = 19;

+Hclose = 20;

+Hsetsnarf = 21;

+Hsnarflen = 22;

+Hack = 23;

+Hexit = 24;

+Hplumb = 25;

+Hmenucmd = 26;

+HMAX = 27;

+sizeofHeader = 8;

+aggr Header

+{

+	'b' 0 type;

+	'b' 1 count0;

+	'b' 2 count1;

+	'a' 3 data;

+};

+

+defn

+Header(addr) {

+	complex Header addr;

+	print("	type	", addr.type, "\n");

+	print("	count0	", addr.count0, "\n");

+	print("	count1	", addr.count1, "\n");

+	print("	data	", addr.data, "\n");

+};

+

+complex String print_ss:a;

+complex String print_ss:b;

+complex String print_s:a;

+complex Dir statfile:dirb;

+complex Dir statfd:dirb;

+complex Waitmsg waitfor:w;

--- /dev/null

+++ b/sys/src/cmd/jam/plan9.c

@@ -1,0 +1,154 @@

+#include "sam.h"

+

+Rune	samname[] = L"~~jam~~";

+

+Rune *left[]= {

+	L"{[(<«",

+	L"\n",

+	L"'\"`",

+	0

+};

+Rune *right[]= {

+	L"}])>»",

+	L"\n",

+	L"'\"`",

+	0

+};

+

+char	RSAM[] = "jam";

+char	SAMTERM[] = "/bin/aux/jamterm";

+char	HOME[] = "home";

+char	TMPDIR[] = "/tmp";

+char	SH[] = "rc";

+char	SHPATH[] = "/bin/rc";

+char	RX[] = "rx";

+char	RXPATH[] = "/bin/rx";

+char	SAMSAVECMD[] = "/bin/rc\n/sys/lib/jamsave";

+

+void

+dprint(char *z, ...)

+{

+	char buf[BLOCKSIZE];

+	va_list arg;

+

+	va_start(arg, z);

+	vseprint(buf, &buf[BLOCKSIZE], z, arg);

+	va_end(arg);

+	termwrite(buf);

+}

+

+void

+print_ss(char *s, String *a, String *b)

+{

+	dprint("?warning: %s: `%.*S' and `%.*S'\n", s, a->n, a->s, b->n, b->s);

+}

+

+void

+print_s(char *s, String *a)

+{

+	dprint("?warning: %s `%.*S'\n", s, a->n, a->s);

+}

+

+int

+statfile(char *name, ulong *dev, uvlong *id, long *time, long *length, long *appendonly)

+{

+	Dir *dirb;

+

+	dirb = dirstat(name);

+	if(dirb == nil)

+		return -1;

+	if(dev)

+		*dev = dirb->type|(dirb->dev<<16);

+	if(id)

+		*id = dirb->qid.path;

+	if(time)

+		*time = dirb->mtime;

+	if(length)

+		*length = dirb->length;

+	if(appendonly)

+		*appendonly = dirb->mode & DMAPPEND;

+	free(dirb);

+	return 1;

+}

+

+int

+statfd(int fd, ulong *dev, uvlong *id, long *time, long *length, long *appendonly)

+{

+	Dir *dirb;

+

+	dirb = dirfstat(fd);

+	if(dirb == nil)

+		return -1;

+	if(dev)

+		*dev = dirb->type|(dirb->dev<<16);

+	if(id)

+		*id = dirb->qid.path;

+	if(time)

+		*time = dirb->mtime;

+	if(length)

+		*length = dirb->length;

+	if(appendonly)

+		*appendonly = dirb->mode & DMAPPEND;

+	free(dirb);

+	return 1;

+}

+

+void

+notifyf(void *a, char *s)

+{

+	USED(a);

+	if(bpipeok && strcmp(s, "sys: write on closed pipe") == 0)

+		noted(NCONT);

+	if(strcmp(s, "interrupt") == 0)

+		noted(NCONT);

+	panicking = 1;

+	rescue();

+	noted(NDFLT);

+}

+

+char*

+waitfor(int pid)

+{

+	Waitmsg *w;

+	static char msg[ERRMAX];

+

+	while((w = wait()) != nil){

+		if(w->pid != pid){

+			free(w);

+			continue;

+		}

+		strecpy(msg, msg+sizeof msg, w->msg);

+		free(w);

+		return msg;

+	}

+	rerrstr(msg, sizeof msg);

+	return msg;

+}

+

+void

+samerr(char *buf)

+{

+	sprint(buf, "%s/jam.err", TMPDIR);

+}

+

+void*

+emalloc(ulong n)

+{

+	void *p;

+

+	p = mallocz(n, 1);

+	if(p == 0)

+		panic("malloc fails");

+	setmalloctag(p, getcallerpc(&n));

+	return p;

+}

+

+void*

+erealloc(void *p, ulong n)

+{

+	p = realloc(p, n);

+	if(p == 0)

+		panic("realloc fails");

+	setmalloctag(p, getcallerpc(&p));

+	return p;

+}

--- /dev/null

+++ b/sys/src/cmd/jam/rasp.c

@@ -1,0 +1,339 @@

+#include "sam.h"

+/*

+ * GROWDATASIZE must be big enough that all errors go out as Hgrowdata's,

+ * so they will be scrolled into visibility in the ~~jam~~ window (yuck!).

+ */

+#define	GROWDATASIZE	50	/* if size is > this, send data with grow */

+

+void	rcut(List*, Posn, Posn);

+int	rterm(List*, Posn);

+void	rgrow(List*, Posn, Posn);

+

+static	Posn	growpos;

+static	Posn	grown;

+static	Posn	shrinkpos;

+static	Posn	shrunk;

+

+/*

+ * rasp routines inform the terminal of changes to the file.

+ *

+ * a rasp is a list of spans within the file, and an indication

+ * of whether the terminal knows about the span.

+ *

+ * optimize by coalescing multiple updates to the same span

+ * if it is not known by the terminal.

+ *

+ * other possible optimizations: flush terminal's rasp by cut everything,

+ * insert everything if rasp gets too large.

+ */

+

+/*

+ * only called for initial load of file

+ */

+void

+raspload(File *f)

+{

+	if(f->rasp == nil)

+		return;

+	grown = f->nc;

+	growpos = 0;

+	if(f->nc)

+		rgrow(f->rasp, 0, f->nc);

+	raspdone(f, 1);

+}

+

+void

+raspstart(File *f)

+{

+	if(f->rasp == nil)

+		return;

+	grown = 0;

+	shrunk = 0;

+	outbuffered = 1;

+}

+

+void

+raspdone(File *f, int toterm)

+{

+	if(f->dot.r.p1 > f->nc)

+		f->dot.r.p1 = f->nc;

+	if(f->dot.r.p2 > f->nc)

+		f->dot.r.p2 = f->nc;

+	if(f->mark.p1 > f->nc)

+		f->mark.p1 = f->nc;

+	if(f->mark.p2 > f->nc)

+		f->mark.p2 = f->nc;

+	if(f->rasp == nil)

+		return;

+	if(grown)

+		outTsll(Hgrow, f->tag, growpos, grown);

+	else if(shrunk)

+		outTsll(Hcut, f->tag, shrinkpos, shrunk);

+	if(toterm)

+		outTs(Hcheck0, f->tag);

+	outflush();

+	outbuffered = 0;

+	if(f == cmd){

+		cmdpt += cmdptadv;

+		cmdptadv = 0;

+	}

+}

+

+void

+raspflush(File *f)

+{

+	if(grown){

+		outTsll(Hgrow, f->tag, growpos, grown);

+		grown = 0;

+	}

+	else if(shrunk){

+		outTsll(Hcut, f->tag, shrinkpos, shrunk);

+		shrunk = 0;

+	}

+	outflush();

+}

+

+void

+raspdelete(File *f, uint p1, uint p2, int toterm)

+{

+	long n;

+

+	n = p2 - p1;

+	if(n == 0)

+		return;

+

+	if(p2 <= f->dot.r.p1){

+		f->dot.r.p1 -= n;

+		f->dot.r.p2 -= n;

+	}

+	if(p2 <= f->mark.p1){

+		f->mark.p1 -= n;

+		f->mark.p2 -= n;

+	}

+

+	if(f->rasp == nil)

+		return;

+

+	if(f==cmd && p1<cmdpt){

+		if(p2 <= cmdpt)

+			cmdpt -= n;

+		else

+			cmdpt = p1;

+	}

+	if(toterm){

+		if(grown){

+			outTsll(Hgrow, f->tag, growpos, grown);

+			grown = 0;

+		}else if(shrunk && shrinkpos!=p1 && shrinkpos!=p2){

+			outTsll(Hcut, f->tag, shrinkpos, shrunk);

+			shrunk = 0;

+		}

+		if(!shrunk || shrinkpos==p2)

+			shrinkpos = p1;

+		shrunk += n;

+	}

+	rcut(f->rasp, p1, p2);

+}

+

+void

+raspinsert(File *f, uint p1, Rune *buf, uint n, int toterm)

+{

+	Range r;

+

+	if(n == 0)

+		return;

+

+	if(p1 < f->dot.r.p1){

+		f->dot.r.p1 += n;

+		f->dot.r.p2 += n;

+	}

+	if(p1 < f->mark.p1){

+		f->mark.p1 += n;

+		f->mark.p2 += n;

+	}

+

+

+	if(f->rasp == nil)

+		return;

+	if(f==cmd && p1<cmdpt)

+		cmdpt += n;

+	if(toterm){

+		if(shrunk){

+			outTsll(Hcut, f->tag, shrinkpos, shrunk);

+			shrunk = 0;

+		}

+		if(n>GROWDATASIZE || !rterm(f->rasp, p1)){

+			rgrow(f->rasp, p1, n);

+			if(grown && growpos+grown!=p1 && growpos!=p1){

+				outTsll(Hgrow, f->tag, growpos, grown);

+				grown = 0;

+			}

+			if(!grown)

+				growpos = p1;

+			grown += n;

+		}else{

+			if(grown){

+				outTsll(Hgrow, f->tag, growpos, grown);

+				grown = 0;

+			}

+			rgrow(f->rasp, p1, n);

+			r = rdata(f->rasp, p1, n);

+			if(r.p1!=p1 || r.p2!=p1+n)

+				panic("rdata in toterminal");

+			outTsllS(Hgrowdata, f->tag, p1, n, tmprstr(buf, n));

+		}

+	}else{

+		rgrow(f->rasp, p1, n);

+		r = rdata(f->rasp, p1, n);

+		if(r.p1!=p1 || r.p2!=p1+n)

+			panic("rdata in toterminal");

+	}

+}

+

+#define	M	0x80000000L

+#define	P(i)	r->posnptr[i]

+#define	T(i)	(P(i)&M)	/* in terminal */

+#define	L(i)	(P(i)&~M)	/* length of this piece */

+

+void

+rcut(List *r, Posn p1, Posn p2)

+{

+	Posn p, x;

+	int i;

+

+	if(p1 == p2)

+		panic("rcut 0");

+	for(p=0,i=0; i<r->nused && p+L(i)<=p1; p+=L(i++))

+		;

+	if(i == r->nused)

+		panic("rcut 1");

+	if(p < p1){	/* chop this piece */

+		if(p+L(i) < p2){

+			x = p1-p;

+			p += L(i);

+		}else{

+			x = L(i)-(p2-p1);

+			p = p2;

+		}

+		if(T(i))

+			P(i) = x|M;

+		else

+			P(i) = x;

+		i++;

+	}

+	while(i<r->nused && p+L(i)<=p2){

+		p += L(i);

+		dellist(r, i);

+	}

+	if(p < p2){

+		if(i == r->nused)

+			panic("rcut 2");

+		x = L(i)-(p2-p);

+		if(T(i))

+			P(i) = x|M;

+		else

+			P(i) = x;

+	}

+	/* can we merge i and i-1 ? */

+	if(i>0 && i<r->nused && T(i-1)==T(i)){

+		x = L(i-1)+L(i);

+		dellist(r, i--);

+		if(T(i))

+			P(i)=x|M;

+		else

+			P(i)=x;

+	}

+}

+

+void

+rgrow(List *r, Posn p1, Posn n)

+{

+	Posn p;

+	int i;

+

+	if(n == 0)

+		panic("rgrow 0");

+	for(p=0,i=0; i<r->nused && p+L(i)<=p1; p+=L(i++))

+		;

+	if(i == r->nused){	/* stick on end of file */

+		if(p!=p1)

+			panic("rgrow 1");

+		if(i>0 && !T(i-1))

+			P(i-1)+=n;

+		else

+			inslist(r, i, n);

+	}else if(!T(i))		/* goes in this empty piece */

+		P(i)+=n;

+	else if(p==p1 && i>0 && !T(i-1))	/* special case; simplifies life */

+		P(i-1)+=n;

+	else if(p==p1)

+		inslist(r, i, n);

+	else{			/* must break piece in terminal */

+		inslist(r, i+1, (L(i)-(p1-p))|M);

+		inslist(r, i+1, n);

+		P(i) = (p1-p)|M;

+	}

+}

+

+int

+rterm(List *r, Posn p1)

+{

+	Posn p;

+	int i;

+

+	for(p = 0,i = 0; i<r->nused && p+L(i)<=p1; p+=L(i++))

+		;

+	if(i==r->nused && (i==0 || !T(i-1)))

+		return 0;

+	return T(i);

+}

+

+Range

+rdata(List *r, Posn p1, Posn n)

+{

+	Posn p;

+	int i;

+	Range rg;

+

+	if(n==0)

+		panic("rdata 0");

+	for(p = 0,i = 0; i<r->nused && p+L(i)<=p1; p+=L(i++))

+		;

+	if(i==r->nused)

+		panic("rdata 1");

+	if(T(i)){

+		n-=L(i)-(p1-p);

+		if(n<=0){

+			rg.p1 = rg.p2 = p1;

+			return rg;

+		}

+		p+=L(i++);

+		p1 = p;

+	}

+	if(T(i) || i==r->nused)

+		panic("rdata 2");

+	if(p+L(i)<p1+n)

+		n = L(i)-(p1-p);

+	rg.p1 = p1;

+	rg.p2 = p1+n;

+	if(p!=p1){

+		inslist(r, i+1, L(i)-(p1-p));

+		P(i)=p1-p;

+		i++;

+	}

+	if(L(i)!=n){

+		inslist(r, i+1, L(i)-n);

+		P(i)=n;

+	}

+	P(i)|=M;

+	/* now i is set; can we merge? */

+	if(i<r->nused-1 && T(i+1)){

+		P(i)=(n+=L(i+1))|M;

+		dellist(r, i+1);

+	}

+	if(i>0 && T(i-1)){

+		P(i)=(n+L(i-1))|M;

+		dellist(r, i-1);

+	}

+	return rg;

+}

--- /dev/null

+++ b/sys/src/cmd/jam/regexp.c

@@ -1,0 +1,805 @@

+#include "sam.h"

+

+Rangeset	sel;

+String		lastregexp;

+/*

+ * Machine Information

+ */

+typedef struct Inst Inst;

+

+struct Inst

+{

+	long	type;	/* <= Runemax ==> literal, otherwise action */

+	union {

+		int rsid;

+		int rsubid;

+		int class;

+		struct Inst *rother;

+		struct Inst *rright;

+	} r;

+	union{

+		struct Inst *lleft;

+		struct Inst *lnext;

+	} l;

+};

+#define	sid	r.rsid

+#define	subid	r.rsubid

+#define	rclass	r.class

+#define	other	r.rother

+#define	right	r.rright

+#define	left	l.lleft

+#define	next	l.lnext

+

+#define	NPROG	1024

+Inst	program[NPROG];

+Inst	*progp;

+Inst	*startinst;	/* First inst. of program; might not be program[0] */

+Inst	*bstartinst;	/* same for backwards machine */

+

+typedef struct Ilist Ilist;

+struct Ilist

+{

+	Inst	*inst;		/* Instruction of the thread */

+	Rangeset se;

+	Posn	startp;		/* first char of match */

+};

+

+#define	NLIST	127

+

+Ilist	*tl, *nl;		/* This list, next list */

+Ilist	list[2][NLIST+1];	/* +1 for trailing null */

+static	Rangeset sempty;

+

+/*

+ * Actions and Tokens

+ *

+ *	0x100xx are operators, value == precedence

+ *	0x200xx are tokens, i.e. operands for operators

+ */

+enum {

+	OPERATOR = Runemask+1,	/* Bitmask of all operators */

+	START	= OPERATOR,	/* Start, used for marker on stack */

+	RBRA,			/* Right bracket, ) */

+	LBRA,			/* Left bracket, ( */

+	OR,			/* Alternation, | */

+	CAT,			/* Concatentation, implicit operator */

+	STAR,			/* Closure, * */

+	PLUS,			/* a+ == aa* */

+	QUEST,			/* a? == a|nothing, i.e. 0 or 1 a's */

+

+	ANY	= OPERATOR<<1,	/* Any character but newline, . */

+	NOP,			/* No operation, internal use only */

+	BOL,			/* Beginning of line, ^ */

+	EOL,			/* End of line, $ */

+	CCLASS,			/* Character class, [] */

+	NCCLASS,		/* Negated character class, [^] */

+	END,			/* Terminate: match found */

+

+	ISATOR	= OPERATOR,

+	ISAND	= OPERATOR<<1,

+};

+

+/*

+ * Parser Information

+ */

+typedef struct Node Node;

+struct Node

+{

+	Inst	*first;

+	Inst	*last;

+};

+

+#define	NSTACK	20

+Node	andstack[NSTACK];

+Node	*andp;

+int	atorstack[NSTACK];

+int	*atorp;

+int	lastwasand;	/* Last token was operand */

+int	cursubid;

+int	subidstack[NSTACK];

+int	*subidp;

+int	backwards;

+int	nbra;

+Rune	*exprp;		/* pointer to next character in source expression */

+#define	DCLASS	10	/* allocation increment */

+int	nclass;		/* number active */

+int	Nclass;		/* high water mark */

+Rune	**class;

+int	negateclass;

+

+int	addinst(Ilist *l, Inst *inst, Rangeset *sep);

+void	newmatch(Rangeset*);

+void	bnewmatch(Rangeset*);

+void	pushand(Inst*, Inst*);

+void	pushator(int);

+Node	*popand(int);

+int	popator(void);

+void	startlex(Rune*);

+int	lex(void);

+void	operator(int);

+void	operand(int);

+void	evaluntil(int);

+void	optimize(Inst*);

+void	bldcclass(void);

+

+void

+regerror(Err e)

+{

+	Strzero(&lastregexp);

+	error(e);

+}

+

+void

+regerror_c(Err e, int c)

+{

+	Strzero(&lastregexp);

+	error_c(e, c);

+}

+

+Inst *

+newinst(int t)

+{

+	if(progp >= &program[NPROG])

+		regerror(Etoolong);

+	progp->type = t;

+	progp->left = 0;

+	progp->right = 0;

+	return progp++;

+}

+

+Inst *

+realcompile(Rune *s)

+{

+	int token;

+

+	startlex(s);

+	atorp = atorstack;

+	andp = andstack;

+	subidp = subidstack;

+	cursubid = 0;

+	lastwasand = FALSE;

+	/* Start with a low priority operator to prime parser */

+	pushator(START-1);

+	while((token=lex()) != END){

+		if((token&ISATOR) == OPERATOR)

+			operator(token);

+		else

+			operand(token);

+	}

+	/* Close with a low priority operator */

+	evaluntil(START);

+	/* Force END */

+	operand(END);

+	evaluntil(START);

+	if(nbra)

+		regerror(Eleftpar);

+	--andp;	/* points to first and only operand */

+	return andp->first;

+}

+

+void

+compile(String *s)

+{

+	int i;

+	Inst *oprogp;

+

+	if(Strcmp(s, &lastregexp)==0)

+		return;

+	for(i=0; i<nclass; i++)

+		free(class[i]);

+	nclass = 0;

+	progp = program;

+	backwards = FALSE;

+	startinst = realcompile(s->s);

+	optimize(program);

+	oprogp = progp;

+	backwards = TRUE;

+	bstartinst = realcompile(s->s);

+	optimize(oprogp);

+	Strduplstr(&lastregexp, s);

+}

+

+void

+operand(int t)

+{

+	Inst *i;

+	if(lastwasand)

+		operator(CAT);	/* catenate is implicit */

+	i = newinst(t);

+	if(t == CCLASS){

+		if(negateclass)

+			i->type = NCCLASS;	/* UGH */

+		i->rclass = nclass-1;		/* UGH */

+	}

+	pushand(i, i);

+	lastwasand = TRUE;

+}

+

+void

+operator(int t)

+{

+	if(t==RBRA && --nbra<0)

+		regerror(Erightpar);

+	if(t==LBRA){

+/*

+ *		if(++cursubid >= NSUBEXP)

+ *			regerror(Esubexp);

+ */

+		cursubid++;	/* silently ignored */

+		nbra++;

+		if(lastwasand)

+			operator(CAT);

+	}else

+		evaluntil(t);

+	if(t!=RBRA)

+		pushator(t);

+	lastwasand = FALSE;

+	if(t==STAR || t==QUEST || t==PLUS || t==RBRA)

+		lastwasand = TRUE;	/* these look like operands */

+}

+

+void

+cant(char *s)

+{

+	char buf[100];

+

+	sprint(buf, "regexp: can't happen: %s", s);

+	panic(buf);

+}

+

+void

+pushand(Inst *f, Inst *l)

+{

+	if(andp >= &andstack[NSTACK])

+		cant("operand stack overflow");

+	andp->first = f;

+	andp->last = l;

+	andp++;

+}

+

+void

+pushator(int t)

+{

+	if(atorp >= &atorstack[NSTACK])

+		cant("operator stack overflow");

+	*atorp++=t;

+	if(cursubid >= NSUBEXP)

+		*subidp++= -1;

+	else

+		*subidp++=cursubid;

+}

+

+Node *

+popand(int op)

+{

+	if(andp <= &andstack[0])

+		if(op)

+			regerror_c(Emissop, op);

+		else

+			regerror(Ebadregexp);

+	return --andp;

+}

+

+int

+popator(void)

+{

+	if(atorp <= &atorstack[0])

+		cant("operator stack underflow");

+	--subidp;

+	return *--atorp;

+}

+

+void

+evaluntil(int pri)

+{

+	Node *op1, *op2, *t;

+	Inst *inst1, *inst2;

+

+	while(pri==RBRA || atorp[-1]>=pri){

+		switch(popator()){

+		case LBRA:

+			op1 = popand('(');

+			inst2 = newinst(RBRA);

+			inst2->subid = *subidp;

+			op1->last->next = inst2;

+			inst1 = newinst(LBRA);

+			inst1->subid = *subidp;

+			inst1->next = op1->first;

+			pushand(inst1, inst2);

+			return;		/* must have been RBRA */

+		default:

+			panic("unknown regexp operator");

+			break;

+		case OR:

+			op2 = popand('|');

+			op1 = popand('|');

+			inst2 = newinst(NOP);

+			op2->last->next = inst2;

+			op1->last->next = inst2;

+			inst1 = newinst(OR);

+			inst1->right = op1->first;

+			inst1->left = op2->first;

+			pushand(inst1, inst2);

+			break;

+		case CAT:

+			op2 = popand(0);

+			op1 = popand(0);

+			if(backwards && op2->first->type!=END)

+				t = op1, op1 = op2, op2 = t;

+			op1->last->next = op2->first;

+			pushand(op1->first, op2->last);

+			break;

+		case STAR:

+			op2 = popand('*');

+			inst1 = newinst(OR);

+			op2->last->next = inst1;

+			inst1->right = op2->first;

+			pushand(inst1, inst1);

+			break;

+		case PLUS:

+			op2 = popand('+');

+			inst1 = newinst(OR);

+			op2->last->next = inst1;

+			inst1->right = op2->first;

+			pushand(op2->first, inst1);

+			break;

+		case QUEST:

+			op2 = popand('?');

+			inst1 = newinst(OR);

+			inst2 = newinst(NOP);

+			inst1->left = inst2;

+			inst1->right = op2->first;

+			op2->last->next = inst2;

+			pushand(inst1, inst2);

+			break;

+		}

+	}

+}

+

+

+void

+optimize(Inst *start)

+{

+	Inst *inst, *target;

+

+	for(inst=start; inst->type!=END; inst++){

+		target = inst->next;

+		while(target->type == NOP)

+			target = target->next;

+		inst->next = target;

+	}

+}

+

+#ifdef	DEBUG

+void

+dumpstack(void){

+	Node *stk;

+	int *ip;

+

+	dprint("operators\n");

+	for(ip = atorstack; ip<atorp; ip++)

+		dprint("0%o\n", *ip);

+	dprint("operands\n");

+	for(stk = andstack; stk<andp; stk++)

+		dprint("0%o\t0%o\n", stk->first->type, stk->last->type);

+}

+void

+dump(void){

+	Inst *l;

+

+	l = program;

+	do{

+		dprint("%d:\t0%o\t%d\t%d\n", l-program, l->type,

+			l->left-program, l->right-program);

+	}while(l++->type);

+}

+#endif

+

+void

+startlex(Rune *s)

+{

+	exprp = s;

+	nbra = 0;

+}

+

+

+int

+lex(void){

+	int c= *exprp++;

+

+	switch(c){

+	case '\\':

+		if(*exprp)

+			if((c= *exprp++)=='n')

+				c='\n';

+		break;

+	case 0:

+		c = END;

+		--exprp;	/* In case we come here again */

+		break;

+	case '*':

+		c = STAR;

+		break;

+	case '?':

+		c = QUEST;

+		break;

+	case '+':

+		c = PLUS;

+		break;

+	case '|':

+		c = OR;

+		break;

+	case '.':

+		c = ANY;

+		break;

+	case '(':

+		c = LBRA;

+		break;

+	case ')':

+		c = RBRA;

+		break;

+	case '^':

+		c = BOL;

+		break;

+	case '$':

+		c = EOL;

+		break;

+	case '[':

+		c = CCLASS;

+		bldcclass();

+		break;

+	}

+	return c;

+}

+

+long

+nextrec(void){

+	if(exprp[0]==0 || (exprp[0]=='\\' && exprp[1]==0))

+		regerror(Ebadclass);

+	if(exprp[0] == '\\'){

+		exprp++;

+		if(*exprp=='n'){

+			exprp++;

+			return '\n';

+		}

+		return *exprp++|(Runemask+1);

+	}

+	return *exprp++;

+}

+

+void

+bldcclass(void)

+{

+	long c1, c2, n, na;

+	Rune *classp;

+

+	classp = emalloc(DCLASS*RUNESIZE);

+	n = 0;

+	na = DCLASS;

+	/* we have already seen the '[' */

+	if(*exprp == '^'){

+		classp[n++] = '\n';	/* don't match newline in negate case */

+		negateclass = TRUE;

+		exprp++;

+	}else

+		negateclass = FALSE;

+	while((c1 = nextrec()) != ']'){

+		if(c1 == '-'){

+    Error:

+			free(classp);

+			regerror(Ebadclass);

+		}

+		if(n+4 >= na){		/* 3 runes plus NUL */

+			na += DCLASS;

+			classp = erealloc(classp, na*RUNESIZE);

+		}

+		if(*exprp == '-'){

+			exprp++;	/* eat '-' */

+			if((c2 = nextrec()) == ']')

+				goto Error;

+			classp[n+0] = Runemax;

+			classp[n+1] = c1 & Runemask;

+			classp[n+2] = c2 & Runemask;

+			n += 3;

+		}else

+			classp[n++] = c1 & Runemask;

+	}

+	classp[n] = 0;

+	if(nclass == Nclass){

+		Nclass += DCLASS;

+		class = erealloc(class, Nclass*sizeof(Rune*));

+	}

+	class[nclass++] = classp;

+}

+

+int

+classmatch(int classno, int c, int negate)

+{

+	Rune *p;

+

+	p = class[classno];

+	while(*p){

+		if(*p == Runemax){

+			if(p[1]<=c && c<=p[2])

+				return !negate;

+			p += 3;

+		}else if(*p++ == c)

+			return !negate;

+	}

+	return negate;

+}

+

+/*

+ * Note optimization in addinst:

+ * 	*l must be pending when addinst called; if *l has been looked

+ *		at already, the optimization is a bug.

+ */

+int

+addinst(Ilist *l, Inst *inst, Rangeset *sep)

+{

+	Ilist *p;

+

+	for(p = l; p->inst; p++){

+		if(p->inst==inst){

+			if((sep)->p[0].p1 < p->se.p[0].p1)

+				p->se= *sep;	/* this would be bug */

+			return 0;	/* It's already there */

+		}

+	}

+	p->inst = inst;

+	p->se= *sep;

+	(p+1)->inst = 0;

+	return 1;

+}

+

+int

+execute(File *f, Posn startp, Posn eof)

+{

+	int flag = 0;

+	Inst *inst;

+	Ilist *tlp;

+	Posn p = startp;

+	int nnl = 0, ntl;

+	int c;

+	int wrapped = 0;

+	int startchar = startinst->type<OPERATOR? startinst->type : 0;

+

+	list[0][0].inst = list[1][0].inst = 0;

+	sel.p[0].p1 = -1;

+	/* Execute machine once for each character */

+	for(;;p++){

+	doloop:

+		c = filereadc(f, p);

+		if(p>=eof || c<0){

+			switch(wrapped++){

+			case 0:		/* let loop run one more click */

+			case 2:

+				break;

+			case 1:		/* expired; wrap to beginning */

+				if(sel.p[0].p1>=0 || eof!=INFINITY)

+					goto Return;

+				list[0][0].inst = list[1][0].inst = 0;

+				p = 0;

+				goto doloop;

+			default:

+				goto Return;

+			}

+		}else if(((wrapped && p>=startp) || sel.p[0].p1>0) && nnl==0)

+			break;

+		/* fast check for first char */

+		if(startchar && nnl==0 && c!=startchar)

+			continue;

+		tl = list[flag];

+		nl = list[flag^=1];

+		nl->inst = 0;

+		ntl = nnl;

+		nnl = 0;

+		if(sel.p[0].p1<0 && (!wrapped || p<startp || startp==eof)){

+			/* Add first instruction to this list */

+			sempty.p[0].p1 = p;

+			if(addinst(tl, startinst, &sempty))

+			if(++ntl >= NLIST)

+	Overflow:

+				error(Eoverflow);

+		}

+		/* Execute machine until this list is empty */

+		for(tlp = tl; inst = tlp->inst; tlp++){	/* assignment = */

+	Switchstmt:

+			switch(inst->type){

+			default:	/* regular character */

+				if(inst->type==c){

+	Addinst:

+					if(addinst(nl, inst->next, &tlp->se))

+					if(++nnl >= NLIST)

+						goto Overflow;

+				}

+				break;

+			case LBRA:

+				if(inst->subid>=0)

+					tlp->se.p[inst->subid].p1 = p;

+				inst = inst->next;

+				goto Switchstmt;

+			case RBRA:

+				if(inst->subid>=0)

+					tlp->se.p[inst->subid].p2 = p;

+				inst = inst->next;

+				goto Switchstmt;

+			case ANY:

+				if(c!='\n')

+					goto Addinst;

+				break;

+			case BOL:

+				if(p==0 || filereadc(f, p - 1)=='\n'){

+	Step:

+					inst = inst->next;

+					goto Switchstmt;

+				}

+				break;

+			case EOL:

+				if(c == '\n')

+					goto Step;

+				break;

+			case CCLASS:

+				if(c>=0 && classmatch(inst->rclass, c, 0))

+					goto Addinst;

+				break;

+			case NCCLASS:

+				if(c>=0 && classmatch(inst->rclass, c, 1))

+					goto Addinst;

+				break;

+			case OR:

+				/* evaluate right choice later */

+				if(addinst(tlp, inst->right, &tlp->se))

+				if(++ntl >= NLIST)

+					goto Overflow;

+				/* efficiency: advance and re-evaluate */

+				inst = inst->left;

+				goto Switchstmt;

+			case END:	/* Match! */

+				tlp->se.p[0].p2 = p;

+				newmatch(&tlp->se);

+				break;

+			}

+		}

+	}

+    Return:

+	return sel.p[0].p1>=0;

+}

+

+void

+newmatch(Rangeset *sp)

+{

+	int i;

+

+	if(sel.p[0].p1<0 || sp->p[0].p1<sel.p[0].p1 ||

+	   (sp->p[0].p1==sel.p[0].p1 && sp->p[0].p2>sel.p[0].p2))

+		for(i = 0; i<NSUBEXP; i++)

+			sel.p[i] = sp->p[i];

+}

+

+int

+bexecute(File *f, Posn startp)

+{

+	int flag = 0;

+	Inst *inst;

+	Ilist *tlp;

+	Posn p = startp;

+	int nnl = 0, ntl;

+	int c;

+	int wrapped = 0;

+	int startchar = bstartinst->type<OPERATOR? bstartinst->type : 0;

+

+	list[0][0].inst = list[1][0].inst = 0;

+	sel.p[0].p1= -1;

+	/* Execute machine once for each character, including terminal NUL */

+	for(;;--p){

+	doloop:

+		if((c = filereadc(f, p - 1))==-1){

+			switch(wrapped++){

+			case 0:		/* let loop run one more click */

+			case 2:

+				break;

+			case 1:		/* expired; wrap to end */

+				if(sel.p[0].p1>=0)

+			case 3:

+					goto Return;

+				list[0][0].inst = list[1][0].inst = 0;

+				p = f->nc;

+				goto doloop;

+			default:

+				goto Return;

+			}

+		}else if(((wrapped && p<=startp) || sel.p[0].p1>0) && nnl==0)

+			break;

+		/* fast check for first char */

+		if(startchar && nnl==0 && c!=startchar)

+			continue;

+		tl = list[flag];

+		nl = list[flag^=1];

+		nl->inst = 0;

+		ntl = nnl;

+		nnl = 0;

+		if(sel.p[0].p1<0 && (!wrapped || p>startp)){

+			/* Add first instruction to this list */

+			/* the minus is so the optimizations in addinst work */

+			sempty.p[0].p1 = -p;

+			if(addinst(tl, bstartinst, &sempty))

+			if(++ntl >= NLIST)

+	Overflow:

+				error(Eoverflow);

+		}

+		/* Execute machine until this list is empty */

+		for(tlp = tl; inst = tlp->inst; tlp++){	/* assignment = */

+	Switchstmt:

+			switch(inst->type){

+			default:	/* regular character */

+				if(inst->type == c){

+	Addinst:

+					if(addinst(nl, inst->next, &tlp->se))

+					if(++nnl >= NLIST)

+						goto Overflow;

+				}

+				break;

+			case LBRA:

+				if(inst->subid>=0)

+					tlp->se.p[inst->subid].p1 = p;

+				inst = inst->next;

+				goto Switchstmt;

+			case RBRA:

+				if(inst->subid >= 0)

+					tlp->se.p[inst->subid].p2 = p;

+				inst = inst->next;

+				goto Switchstmt;

+			case ANY:

+				if(c != '\n')

+					goto Addinst;

+				break;

+			case BOL:

+				if(c=='\n' || p==0){

+	Step:

+					inst = inst->next;

+					goto Switchstmt;

+				}

+				break;

+			case EOL:

+				if(p==f->nc || filereadc(f, p)=='\n')

+					goto Step;

+				break;

+			case CCLASS:

+				if(c>=0 && classmatch(inst->rclass, c, 0))

+					goto Addinst;

+				break;

+			case NCCLASS:

+				if(c>=0 && classmatch(inst->rclass, c, 1))

+					goto Addinst;

+				break;

+			case OR:

+				/* evaluate right choice later */

+				if(addinst(tl, inst->right, &tlp->se))

+				if(++ntl >= NLIST)

+					goto Overflow;

+				/* efficiency: advance and re-evaluate */

+				inst = inst->left;

+				goto Switchstmt;

+			case END:	/* Match! */

+				tlp->se.p[0].p1 = -tlp->se.p[0].p1; /* minus sign */

+				tlp->se.p[0].p2 = p;

+				bnewmatch(&tlp->se);

+				break;

+			}

+		}

+	}

+    Return:

+	return sel.p[0].p1>=0;

+}

+

+void

+bnewmatch(Rangeset *sp)

+{

+        int  i;

+        if(sel.p[0].p1<0 || sp->p[0].p1>sel.p[0].p2 || (sp->p[0].p1==sel.p[0].p2 && sp->p[0].p2<sel.p[0].p1))

+                for(i = 0; i<NSUBEXP; i++){       /* note the reversal; p1<=p2 */

+                        sel.p[i].p1 = sp->p[i].p2;

+                        sel.p[i].p2 = sp->p[i].p1;

+                }

+}

--- /dev/null

+++ b/sys/src/cmd/jam/sam.c

@@ -1,0 +1,735 @@

+#include "sam.h"

+

+Rune	genbuf[BLOCKSIZE];

+int	io;

+int	panicking;

+int	rescuing;

+String	genstr;

+String	rhs;

+String	curwd;

+String	cmdstr;

+Rune	empty[] = { 0 };

+char	*genc;

+File	*curfile;

+File	*flist;

+File	*cmd;

+jmp_buf	mainloop;

+List	tempfile = { 'p' };

+int	quitok = TRUE;

+int	downloaded;

+int	dflag;

+int	Rflag;

+char	*machine;

+char	*home;

+int	bpipeok;

+int	termlocked;

+char	*samterm = SAMTERM;

+char	*rsamname = RSAM;

+File	*lastfile;

+Disk	*disk;

+long	seq;

+

+Rune	baddir[] = { '<', 'b', 'a', 'd', 'd', 'i', 'r', '>', '\n'};

+

+void	usage(void);

+

+void main(int argc, char *argv[])

+{

+	int i;

+	String *t;

+	char *termargs[10], **ap;

+	

+	ap = termargs;

+	*ap++ = "jamterm";

+	ARGBEGIN{

+	case 'd':

+		dflag++;

+		break;

+	case 'r':

+		machine = EARGF(usage());

+		break;

+	case 'R':

+		Rflag++;

+		break;

+	case 't':

+		samterm = EARGF(usage());

+		break;

+	case 's':

+		rsamname = EARGF(usage());

+		break;

+	default:

+		dprint("jam: unknown flag %c\n", ARGC());

+		usage();

+	/* options for jamterm */

+	case 'A':

+		*ap++ = "-A";

+		if(ap >= termargs+nelem(termargs))

+			usage();

+		break;

+	case 'i':

+		*ap++ = "-i";

+		if(ap >= termargs+nelem(termargs))

+			usage();

+		break;

+	}ARGEND

+	*ap = nil;

+	

+	Strinit(&cmdstr);

+	Strinit0(&lastpat);

+	Strinit0(&lastregexp);

+	Strinit0(&genstr);

+	Strinit0(&rhs);

+	Strinit0(&curwd);

+	Strinit0(&plan9cmd);

+	home = getenv(HOME);

+	disk = diskinit();

+	if(home == 0)

+		home = "/";

+	if(!dflag)

+		startup(machine, Rflag, termargs, argv);

+	notify(notifyf);

+	getcurwd();

+	if(argc>0){

+		for(i=0; i<argc; i++){

+			if(!setjmp(mainloop)){

+				t = tmpcstr(argv[i]);

+				Straddc(t, '\0');

+				Strduplstr(&genstr, t);

+				freetmpstr(t);

+				fixname(&genstr);

+				logsetname(newfile(), &genstr);

+			}

+		}

+	}else if(!downloaded)

+		newfile();

+	seq++;

+	if(file.nused)

+		current(file.filepptr[0]);

+	setjmp(mainloop);

+	cmdloop();

+	trytoquit();	/* if we already q'ed, quitok will be TRUE */

+	exits(0);

+}

+

+void

+usage(void)

+{

+	dprint("usage: jam [-d] [-t jamterm] [-s jam name] -r machine\n");

+	exits("usage");

+}

+

+void

+rescue(void)

+{

+	int i, nblank = 0;

+	File *f;

+	char *c;

+	char buf[256];

+

+	if(rescuing++)

+		return;

+	io = -1;

+	for(i=0; i<file.nused; i++){

+		f = file.filepptr[i];

+		if(f==cmd || f->nc==0 || !fileisdirty(f))

+			continue;

+		if(io == -1){

+			sprint(buf, "%s/jam.save", home);

+			io = create(buf, 1, 0777);

+			if(io<0)

+				return;

+		}

+		if(f->name.s[0]){

+			c = Strtoc(&f->name);

+			strncpy(buf, c, sizeof buf-1);

+			buf[sizeof buf-1] = 0;

+			free(c);

+		}else

+			sprint(buf, "nameless.%d", nblank++);

+		fprint(io, "#!%s '%s' $* <<'---%s'\n", SAMSAVECMD, buf, buf);

+		addr.r.p1 = 0, addr.r.p2 = f->nc;

+		writeio(f);

+		fprint(io, "\n---%s\n", (char *)buf);

+	}

+}

+

+void

+panic(char *s)

+{

+	int wasd;

+

+	if(!panicking++ && !setjmp(mainloop)){

+		wasd = downloaded;

+		downloaded = 0;

+		dprint("jam: panic: %s: %r\n", s);

+		if(wasd)

+			fprint(2, "jam: panic: %s: %r\n", s);

+		rescue();

+		abort();

+	}

+}

+

+void

+hiccough(char *s)

+{

+	File *f;

+	int i;

+

+	if(rescuing)

+		exits("rescue");

+	if(s)

+		dprint("%s\n", s);

+	resetcmd();

+	resetxec();

+	resetsys();

+	if(io > 0)

+		close(io);

+

+	/*

+	 * back out any logged changes & restore old sequences

+	 */

+	for(i=0; i<file.nused; i++){

+		f = file.filepptr[i];

+		if(f==cmd)

+			continue;

+		if(f->seq==seq){

+			bufdelete(&f->epsilon, 0, f->epsilon.nc);

+			f->seq = f->prevseq;

+			f->dot.r = f->prevdot;

+			f->mark = f->prevmark;

+			state(f, f->prevmod ? Dirty: Clean);

+		}

+	}

+

+	update();

+	if (curfile) {

+		if (curfile->unread)

+			curfile->unread = FALSE;

+		else if (downloaded)

+			outTs(Hcurrent, curfile->tag);

+	}

+	longjmp(mainloop, 1);

+}

+

+void

+intr(void)

+{

+	error(Eintr);

+}

+

+void

+trytoclose(File *f)

+{

+	char *t;

+	char buf[256];

+

+	if(f == cmd)	/* possible? */

+		return;

+	if(f->deleted)

+		return;

+	if(fileisdirty(f) && !f->closeok){

+		f->closeok = TRUE;

+		if(f->name.s[0]){

+			t = Strtoc(&f->name);

+			strncpy(buf, t, sizeof buf-1);

+			free(t);

+		}else

+			strcpy(buf, "nameless file");

+		error_s(Emodified, buf);

+	}

+	f->deleted = TRUE;

+}

+

+void

+trytoquit(void)

+{

+	int c;

+	File *f;

+

+	if(!quitok){

+		for(c = 0; c<file.nused; c++){

+			f = file.filepptr[c];

+			if(f!=cmd && fileisdirty(f)){

+				quitok = TRUE;

+				eof = FALSE;

+				error(Echanges);

+			}

+		}

+	}

+}

+

+void

+load(File *f)

+{

+	Address saveaddr;

+

+	Strduplstr(&genstr, &f->name);

+	filename(f);

+	if(f->name.s[0]){

+		saveaddr = addr;

+		edit(f, 'I');

+		addr = saveaddr;

+	}else{

+		f->unread = 0;

+		f->cleanseq = f->seq;

+	}

+

+	fileupdate(f, TRUE, TRUE);

+}

+

+void

+cmdupdate(void)

+{

+	if(cmd && cmd->seq!=0){

+		fileupdate(cmd, FALSE, downloaded);

+		cmd->dot.r.p1 = cmd->dot.r.p2 = cmd->nc;

+		telldot(cmd);

+	}

+}

+

+void

+delete(File *f)

+{

+	if(downloaded && f->rasp)

+		outTs(Hclose, f->tag);

+	delfile(f);

+	if(f == curfile)

+		current(0);

+}

+

+void

+update(void)

+{

+	int i, anymod;

+	File *f;

+

+	settempfile();

+	for(anymod = i=0; i<tempfile.nused; i++){

+		f = tempfile.filepptr[i];

+		if(f==cmd)	/* cmd gets done in main() */

+			continue;

+		if(f->deleted) {

+			delete(f);

+			continue;

+		}

+		if(f->seq==seq && fileupdate(f, FALSE, downloaded))

+			anymod++;

+		if(f->rasp)

+			telldot(f);

+	}

+	if(anymod)

+		seq++;

+}

+

+File *

+current(File *f)

+{

+	return curfile = f;

+}

+

+void

+edit(File *f, int cmd)

+{

+	int empty = TRUE;

+	Posn p;

+	int nulls;

+

+	if(cmd == 'r')

+		logdelete(f, addr.r.p1, addr.r.p2);

+	if(cmd=='e' || cmd=='I'){

+		logdelete(f, (Posn)0, f->nc);

+		addr.r.p2 = f->nc;

+	}else if(f->nc!=0 || (f->name.s[0] && Strcmp(&genstr, &f->name)!=0))

+		empty = FALSE;

+	if((io = open(genc, OREAD))<0) {

+		if (curfile && curfile->unread)

+			curfile->unread = FALSE;

+		error_r(Eopen, genc);

+	}

+	p = readio(f, &nulls, empty, TRUE);

+	closeio((cmd=='e' || cmd=='I')? -1 : p);

+	if(cmd == 'r')

+		f->ndot.r.p1 = addr.r.p2, f->ndot.r.p2 = addr.r.p2+p;

+	else

+		f->ndot.r.p1 = f->ndot.r.p2 = 0;

+	f->closeok = empty;

+	if (quitok)

+		quitok = empty;

+	else

+		quitok = FALSE;

+	state(f, empty && !nulls? Clean : Dirty);

+	if(empty && !nulls)

+		f->cleanseq = f->seq;

+	if(cmd == 'e')

+		filename(f);

+}

+

+int

+getname(File *f, String *s, int save)

+{

+	int c, i;

+

+	Strzero(&genstr);

+	if(genc){

+		free(genc);

+		genc = 0;

+	}

+	if(s==0 || (c = s->s[0])==0){		/* no name provided */

+		if(f)

+			Strduplstr(&genstr, &f->name);

+		goto Return;

+	}

+	if(c!=' ' && c!='\t')

+		error(Eblank);

+	for(i=0; (c=s->s[i])==' ' || c=='\t'; i++)

+		;

+	while(s->s[i] > ' ')

+		Straddc(&genstr, s->s[i++]);

+	if(s->s[i])

+		error(Enewline);

+	fixname(&genstr);

+	if(f && (save || f->name.s[0]==0)){

+		logsetname(f, &genstr);

+		if(Strcmp(&f->name, &genstr)){

+			quitok = f->closeok = FALSE;

+			f->qidpath = 0;

+			f->mtime = 0;

+			state(f, Dirty); /* if it's 'e', fix later */

+		}

+	}

+    Return:

+	genc = Strtoc(&genstr);

+	i = genstr.n;

+	if(i && genstr.s[i-1]==0)

+		i--;

+	return i;	/* strlen(name) */

+}

+

+void

+filename(File *f)

+{

+	if(genc)

+		free(genc);

+	genc = Strtoc(&genstr);

+	dprint("%c%c%c %s\n", " '"[f->mod],

+		"-+"[f->rasp!=0], " ."[f==curfile], genc);

+}

+

+void

+undostep(File *f, int isundo)

+{

+	uint p1, p2;

+	int mod;

+

+	mod = f->mod;

+	fileundo(f, isundo, 1, &p1, &p2, TRUE);

+	f->ndot = f->dot;

+	if(f->mod){

+		f->closeok = 0;

+		quitok = 0;

+	}else

+		f->closeok = 1;

+

+	if(f->mod != mod){

+		f->mod = mod;

+		if(mod)

+			mod = Clean;

+		else

+			mod = Dirty;

+		state(f, mod);

+	}

+}

+

+int

+undo(int isundo)

+{

+	File *f;

+	int i;

+	Mod max;

+

+	max = undoseq(curfile, isundo);

+	if(max == 0)

+		return 0;

+	settempfile();

+	for(i = 0; i<tempfile.nused; i++){

+		f = tempfile.filepptr[i];

+		if(f!=cmd && undoseq(f, isundo)==max)

+			undostep(f, isundo);

+	}

+	return 1;

+}

+

+int

+readcmd(String *s)

+{

+	int retcode;

+

+	if(flist != 0)

+		fileclose(flist);

+	flist = fileopen();

+

+	addr.r.p1 = 0, addr.r.p2 = flist->nc;

+	retcode = plan9(flist, '<', s, FALSE);

+	fileupdate(flist, FALSE, FALSE);

+	flist->seq = 0;

+	if (flist->nc > BLOCKSIZE)

+		error(Etoolong);

+	Strzero(&genstr);

+	Strinsure(&genstr, flist->nc);

+	bufread(flist, (Posn)0, genbuf, flist->nc);

+	memmove(genstr.s, genbuf, flist->nc*RUNESIZE);

+	genstr.n = flist->nc;

+	Straddc(&genstr, '\0');

+	return retcode;

+}

+

+void

+getcurwd(void)

+{

+	String *t;

+	char buf[256];

+

+	buf[0] = 0;

+	getwd(buf, sizeof(buf));

+	t = tmpcstr(buf);

+	Strduplstr(&curwd, t);

+	freetmpstr(t);

+	if(curwd.n == 0)

+		warn(Wpwd);

+	else if(curwd.s[curwd.n-1] != '/')

+		Straddc(&curwd, '/');

+}

+

+void

+cd(String *str)

+{

+	int i, fd;

+	char *s;

+	File *f;

+	String owd;

+

+	getcurwd();

+	if(getname((File *)0, str, FALSE))

+		s = genc;

+	else

+		s = home;

+	if(chdir(s))

+		syserror("chdir");

+	fd = open("/dev/wdir", OWRITE);

+	if(fd >= 0)

+		write(fd, s, strlen(s));

+	dprint("!\n");

+	Strinit(&owd);

+	Strduplstr(&owd, &curwd);

+	getcurwd();

+	settempfile();

+	for(i=0; i<tempfile.nused; i++){

+		f = tempfile.filepptr[i];

+		if(f!=cmd && f->name.s[0]!='/' && f->name.s[0]!=0){

+			Strinsert(&f->name, &owd, (Posn)0);

+			fixname(&f->name);

+			sortname(f);

+		}else if(f != cmd && Strispre(&curwd, &f->name)){

+			fixname(&f->name);

+			sortname(f);

+		}

+	}

+	Strclose(&owd);

+}

+

+int

+loadflist(String *s)

+{

+	int c, i;

+

+	c = s->s[0];

+	for(i = 0; s->s[i]==' ' || s->s[i]=='\t'; i++)

+		;

+	if((c==' ' || c=='\t') && s->s[i]!='\n'){

+		if(s->s[i]=='<'){

+			Strdelete(s, 0L, (long)i+1);

+			readcmd(s);

+		}else{

+			Strzero(&genstr);

+			while((c = s->s[i++]) && c!='\n')

+				Straddc(&genstr, c);

+			Straddc(&genstr, '\0');

+		}

+	}else{

+		if(c != '\n')

+			error(Eblank);

+		Strdupl(&genstr, empty);

+	}

+	if(genc)

+		free(genc);

+	genc = Strtoc(&genstr);

+	return genstr.s[0];

+}

+

+File *

+readflist(int readall, int delete)

+{

+	Posn i;

+	int c;

+	File *f;

+	String t;

+

+	Strinit(&t);

+	for(i=0,f=0; f==0 || readall || delete; i++){	/* ++ skips blank */

+		Strdelete(&genstr, (Posn)0, i);

+		for(i=0; (c = genstr.s[i])==' ' || c=='\t' || c=='\n'; i++)

+			;

+		if(i >= genstr.n)

+			break;

+		Strdelete(&genstr, (Posn)0, i);

+		for(i=0; (c=genstr.s[i]) && c!=' ' && c!='\t' && c!='\n'; i++)

+			;

+

+		if(i == 0)

+			break;

+		genstr.s[i] = 0;

+		Strduplstr(&t, tmprstr(genstr.s, i+1));

+		fixname(&t);

+		f = lookfile(&t);

+		if(delete){

+			if(f == 0)

+				warn_S(Wfile, &t);

+			else

+				trytoclose(f);

+		}else if(f==0 && readall)

+			logsetname(f = newfile(), &t);

+	}

+	Strclose(&t);

+	return f;

+}

+

+File *

+tofile(String *s)

+{

+	File *f;

+

+	if(s->s[0] != ' ')

+		error(Eblank);

+	if(loadflist(s) == 0){

+		f = lookfile(&genstr);	/* empty string ==> nameless file */

+		if(f == 0)

+			error_s(Emenu, genc);

+	}else if((f=readflist(FALSE, FALSE)) == 0)

+		error_s(Emenu, genc);

+	return current(f);

+}

+

+File *

+getfile(String *s)

+{

+	File *f;

+

+	if(loadflist(s) == 0)

+		logsetname(f = newfile(), &genstr);

+	else if((f=readflist(TRUE, FALSE)) == 0)

+		error(Eblank);

+	return current(f);

+}

+

+void

+closefiles(File *f, String *s)

+{

+	if(s->s[0] == 0){

+		if(f == 0)

+			error(Enofile);

+		trytoclose(f);

+		return;

+	}

+	if(s->s[0] != ' ')

+		error(Eblank);

+	if(loadflist(s) == 0)

+		error(Enewline);

+	readflist(FALSE, TRUE);

+}

+

+void

+copy(File *f, Address addr2)

+{

+	Posn p;

+	int ni;

+	for(p=addr.r.p1; p<addr.r.p2; p+=ni){

+		ni = addr.r.p2-p;

+		if(ni > BLOCKSIZE)

+			ni = BLOCKSIZE;

+		bufread(f, p, genbuf, ni);

+		loginsert(addr2.f, addr2.r.p2, tmprstr(genbuf, ni)->s, ni);

+	}

+	addr2.f->ndot.r.p2 = addr2.r.p2+(f->dot.r.p2-f->dot.r.p1);

+	addr2.f->ndot.r.p1 = addr2.r.p2;

+}

+

+void

+move(File *f, Address addr2)

+{

+	if(addr.r.p2 <= addr2.r.p2){

+		logdelete(f, addr.r.p1, addr.r.p2);

+		copy(f, addr2);

+	}else if(addr.r.p1 >= addr2.r.p2){

+		copy(f, addr2);

+		logdelete(f, addr.r.p1, addr.r.p2);

+	}else

+		error(Eoverlap);

+}

+

+Posn

+nlcount(File *f, Posn p0, Posn p1)

+{

+	Posn nl = 0;

+

+	while(p0 < p1)

+		if(filereadc(f, p0++)=='\n')

+			nl++;

+	return nl;

+}

+

+void

+printposn(File *f, int chars)

+{

+	Posn l1, l2;

+	char *s;

+

+	if(f->name.s[0]){

+		if(f->name.s[0]!='/'){

+			getcurwd();

+			s = Strtoc(&curwd);

+			dprint("%s", s);

+			free(s);

+		}

+		s = Strtoc(&f->name);

+		dprint("%s:", s);

+		free(s);

+	}

+	if(chars){

+		dprint("#%lud", addr.r.p1);

+		if(addr.r.p2 != addr.r.p1)

+			dprint(",#%lud", addr.r.p2);

+	}else{

+		l1 = 1+nlcount(f, (Posn)0, addr.r.p1);

+		l2 = l1+nlcount(f, addr.r.p1, addr.r.p2);

+		/* check if addr ends with '\n' */

+		if(addr.r.p2>0 && addr.r.p2>addr.r.p1 && filereadc(f, addr.r.p2-1)=='\n')

+			--l2;

+		dprint("%lud", l1);

+		if(l2 != l1)

+			dprint(",%lud", l2);

+	}

+	dprint("\n");

+}

+

+void

+settempfile(void)

+{

+	if(tempfile.nalloc < file.nused){

+		if(tempfile.filepptr)

+			free(tempfile.filepptr);

+		tempfile.filepptr = emalloc(sizeof(File*)*file.nused);

+		tempfile.nalloc = file.nused;

+	}

+	memmove(tempfile.filepptr, file.filepptr, sizeof(File*)*file.nused);

+	tempfile.nused = file.nused;

+}

--- /dev/null

+++ b/sys/src/cmd/jam/sam.h

@@ -1,0 +1,404 @@

+#include <u.h>

+#include <libc.h>

+#include <plumb.h>

+#include "errors.h"

+

+/*

+ * BLOCKSIZE is relatively small to keep memory consumption down.

+ */

+

+#define	BLOCKSIZE	2048

+#define	RUNESIZE	sizeof(Rune)

+#define	NDISC		5

+#define	NBUFFILES	3+2*NDISC	/* plan 9+undo+snarf+NDISC*(transcript+buf) */

+#define NSUBEXP	10

+

+#define	TRUE		1

+#define	FALSE		0

+

+#define	INFINITY	0x7FFFFFFFL

+#define	INCR		25

+#define	STRSIZE		(512<<20)

+

+typedef long		Posn;		/* file position or address */

+typedef	ushort		Mod;		/* modification number */

+

+typedef struct Address	Address;

+typedef struct Block	Block;

+typedef struct Buffer	Buffer;

+typedef struct Disk	Disk;

+typedef struct Discdesc	Discdesc;

+typedef struct File	File;

+typedef struct List	List;

+typedef struct Range	Range;

+typedef struct Rangeset	Rangeset;

+typedef struct String	String;

+

+enum State

+{

+	Clean =		' ',

+	Dirty =		'\'',

+	Unread =	'-',

+};

+

+struct Range

+{

+	Posn	p1, p2;

+};

+

+struct Rangeset

+{

+	Range	p[NSUBEXP];

+};

+

+struct Address

+{

+	Range	r;

+	File	*f;

+};

+

+struct String

+{

+	short	n;

+	short	size;

+	Rune	*s;

+};

+

+struct List

+{

+	int	type;	/* 'p' for pointer, 'P' for Posn */

+	int	nalloc;

+	int	nused;

+	union{

+		void*	listp;

+		void**	voidp;

+		Posn*	posnp;

+		String**stringp;

+		File**	filep;

+	}g;

+};

+

+#define	listptr		g.listp

+#define	voidpptr	g.voidp

+#define	posnptr		g.posnp

+#define	stringpptr	g.stringp

+#define	filepptr	g.filep

+

+enum

+{

+	Blockincr =	256,

+	Maxblock = 	8*1024,

+

+	BUFSIZE = Maxblock,	/* size from fbufalloc() */

+	RBUFSIZE = BUFSIZE/sizeof(Rune),

+};

+

+

+enum

+{

+	Null		= '-',

+	Delete		= 'd',

+	Insert		= 'i',

+	Filename	= 'f',

+	Dot		= 'D',

+	Mark		= 'm',

+};

+

+struct Block

+{

+	uint		addr;	/* disk address in bytes */

+	union

+	{

+		uint	n;	/* number of used runes in block */

+		Block	*next;	/* pointer to next in free list */

+	};

+};

+

+struct Disk

+{

+	int		fd;

+	vlong		addr;	/* length of temp file */

+	Block		*free[Maxblock/Blockincr+1];

+};

+

+Disk*		diskinit(void);

+Block*		disknewblock(Disk*, uint);

+void		diskrelease(Disk*, Block*);

+void		diskread(Disk*, Block*, Rune*, uint);

+void		diskwrite(Disk*, Block**, Rune*, uint);

+

+struct Buffer

+{

+	uint		nc;

+	Rune		*c;	/* cache */

+	uint		cnc;	/* bytes in cache */

+	uint		cmax;	/* size of allocated cache */

+	uint		cq;	/* position of cache */

+	int		cdirty;	/* cache needs to be written */

+	uint		cbi;	/* index of cache Block */

+	Block		**bl;	/* array of blocks */

+	uint		nbl;	/* number of blocks */

+};

+void		bufinsert(Buffer*, uint, Rune*, uint);

+void		bufdelete(Buffer*, uint, uint);

+uint		bufload(Buffer*, uint, int, int*);

+void		bufread(Buffer*, uint, Rune*, uint);

+void		bufclose(Buffer*);

+void		bufreset(Buffer*);

+

+struct File

+{

+	Buffer;				/* the data */

+	Buffer		delta;		/* transcript of changes */

+	Buffer		epsilon;	/* inversion of delta for redo */

+	String		name;		/* name of associated file */

+	uvlong		qidpath;	/* of file when read */

+	uint		mtime;		/* of file when read */

+	int		dev;		/* of file when read */

+	int		unread;		/* file has not been read from disk */

+

+	long		seq;		/* if seq==0, File acts like Buffer */

+	long		cleanseq;	/* f->seq at last read/write of file */

+	int		mod;		/* file appears modified in menu */

+	char		rescuing;	/* jam exiting; this file unusable */

+

+//	Text		*curtext;	/* most recently used associated text */

+//	Text		**text;		/* list of associated texts */

+//	int		ntext;

+//	int		dumpid;		/* used in dumping zeroxed windows */

+

+	Posn		hiposn;		/* highest address touched this Mod */

+	Address		dot;		/* current position */

+	Address		ndot;		/* new current position after update */

+	Range		tdot;		/* what terminal thinks is current range */

+	Range		mark;		/* tagged spot in text (don't confuse with Mark) */

+	List		*rasp;		/* map of what terminal's got */

+	short		tag;		/* for communicating with terminal */

+	char		closeok;	/* ok to close file? */

+	char		deleted;	/* delete at completion of command */

+	Range		prevdot;	/* state before start of change */

+	Range		prevmark;

+	long		prevseq;

+	int		prevmod;

+};

+//File*		fileaddtext(File*, Text*);

+void		fileclose(File*);

+void		filedelete(File*, uint, uint);

+//void		filedeltext(File*, Text*);

+void		fileinsert(File*, uint, Rune*, uint);

+uint		fileload(File*, uint, int, int*);

+void		filemark(File*);

+void		filereset(File*);

+void		filesetname(File*, String*);

+void		fileundelete(File*, Buffer*, uint, uint);

+void		fileuninsert(File*, Buffer*, uint, uint);

+void		fileunsetname(File*, Buffer*);

+void		fileundo(File*, int, int, uint*, uint*, int);

+int		fileupdate(File*, int, int);

+

+int		filereadc(File*, uint);

+File		*fileopen(void);

+void		loginsert(File*, uint, Rune*, uint);

+void		logdelete(File*, uint, uint);

+void		logsetname(File*, String*);

+int		fileisdirty(File*);

+long		undoseq(File*, int);

+long		prevseq(Buffer*);

+

+void		raspload(File*);

+void		raspstart(File*);

+void		raspdelete(File*, uint, uint, int);

+void		raspinsert(File*, uint, Rune*, uint, int);

+void		raspdone(File*, int);

+void		raspflush(File*);

+

+/*

+ * acme fns

+ */

+void*	fbufalloc(void);

+void	fbuffree(void*);

+uint	min(uint, uint);

+void	cvttorunes(char*, int, Rune*, int*, int*, int*);

+

+#define	runemalloc(a)		(Rune*)emalloc((a)*sizeof(Rune))

+#define	runerealloc(a, b)	(Rune*)realloc((a), (b)*sizeof(Rune))

+#define	runemove(a, b, c)	memmove((a), (b), (c)*sizeof(Rune))

+

+int	alnum(int);

+int	Read(int, void*, int);

+void	Seek(int, long, int);

+int	plan9(File*, int, String*, int);

+int	Write(int, void*, int);

+int	bexecute(File*, Posn);

+void	cd(String*);

+void	closefiles(File*, String*);

+void	closeio(Posn);

+void	cmdloop(void);

+void	cmdupdate(void);

+void	compile(String*);

+void	copy(File*, Address);

+File	*current(File*);

+void	delete(File*);

+void	delfile(File*);

+void	dellist(List*, int);

+void	stretchsel(File*, Posn, int);

+void	dprint(char*, ...);

+void	edit(File*, int);

+void	*emalloc(ulong);

+void	*erealloc(void*, ulong);

+void	error(Err);

+void	error_c(Err, int);

+void	error_r(Err, char*);

+void	error_s(Err, char*);

+int	execute(File*, Posn, Posn);

+int	filematch(File*, String*);

+void	filename(File*);

+void	fixname(String*);

+void	fullname(String*);

+void	getcurwd(void);

+File	*getfile(String*);

+int	getname(File*, String*, int);

+long	getnum(int);

+void	hiccough(char*);

+void	inslist(List*, int, ...);

+Address	lineaddr(Posn, Address, int);

+List	*listalloc(int);

+void	listfree(List*);

+void	load(File*);

+File	*lookfile(String*);

+void	lookorigin(File*, Posn, Posn);

+int	lookup(int);

+void	move(File*, Address);

+void	moveto(File*, Range);

+File	*newfile(void);

+void	nextmatch(File*, String*, Posn, int);

+void	notifyf(void*, char*);

+void	panic(char*);

+void	printposn(File*, int);

+void	print_ss(char*, String*, String*);

+void	print_s(char*, String*);

+int	rcv(void);

+Range	rdata(List*, Posn, Posn);

+Posn	readio(File*, int*, int, int);

+void	rescue(void);

+void	resetcmd(void);

+void	resetsys(void);

+void	resetxec(void);

+void	rgrow(List*, Posn, Posn);

+void	samerr(char*);

+void	settempfile(void);

+int	skipbl(void);

+void	snarf(File*, Posn, Posn, Buffer*, int);

+void	sortname(File*);

+void	startup(char*, int, char**, char**);

+void	state(File*, int);

+int	statfd(int, ulong*, uvlong*, long*, long*, long*);

+int	statfile(char*, ulong*, uvlong*, long*, long*, long*);

+void	Straddc(String*, int);

+void	Strclose(String*);

+int	Strcmp(String*, String*);

+void	Strdelete(String*, Posn, Posn);

+void	Strdupl(String*, Rune*);

+void	Strduplstr(String*, String*);

+void	Strinit(String*);

+void	Strinit0(String*);

+void	Strinsert(String*, String*, Posn);

+void	Strinsure(String*, ulong);

+int	Strispre(String*, String*);

+void	Strzero(String*);

+int	Strlen(Rune*);

+char	*Strtoc(String*);

+void	syserror(char*);

+void	telldot(File*);

+void	tellpat(void);

+String	*tmpcstr(char*);

+String	*tmprstr(Rune*, int);

+void	freetmpstr(String*);

+void	termcommand(void);

+void	termwrite(char*);

+File	*tofile(String*);

+void	trytoclose(File*);

+void	trytoquit(void);

+int	undo(int);

+void	update(void);

+char	*waitfor(int);

+void	warn(Warn);

+void	warn_s(Warn, char*);

+void	warn_SS(Warn, String*, String*);

+void	warn_S(Warn, String*);

+int	whichmenu(File*);

+void	writef(File*);

+Posn	writeio(File*);

+Discdesc *Dstart(void);

+

+extern Rune	samname[];	/* compiler dependent */

+extern Rune	*left[];

+extern Rune	*right[];

+

+extern char	RSAM[];		/* system dependent */

+extern char	SAMTERM[];

+extern char	HOME[];

+extern char	TMPDIR[];

+extern char	SH[];

+extern char	SHPATH[];

+extern char	RX[];

+extern char	RXPATH[];

+extern char	SAMSAVECMD[];

+

+/*

+ * acme globals

+ */

+extern long		seq;

+extern Disk		*disk;

+

+extern char	*rsamname;	/* globals */

+extern char	*samterm;

+extern Rune	genbuf[];

+extern char	*genc;

+extern int	io;

+extern int	patset;

+extern int	quitok;

+extern Address	addr;

+extern Buffer	snarfbuf;

+extern Buffer	plan9buf;

+extern Buffer	cmdbuf;

+extern int	cmdbufpos;

+extern List	file;

+extern List	tempfile;

+extern File	*cmd;

+extern File	*curfile;

+extern File	*lastfile;

+extern Mod	modnum;

+extern Posn	cmdpt;

+extern Posn	cmdptadv;

+extern Rangeset	sel;

+extern String	curwd;

+extern String	cmdstr;

+extern String	genstr;

+extern String	lastpat;

+extern String	lastregexp;

+extern String	plan9cmd;

+extern int	downloaded;

+extern int	eof;

+extern int	bpipeok;

+extern int	panicking;

+extern Rune	empty[];

+extern int	termlocked;

+extern int	outbuffered;

+

+#include "mesg.h"

+

+void	outTs(Hmesg, int);

+void	outT0(Hmesg);

+void	outTl(Hmesg, long);

+void	outTslS(Hmesg, int, long, String*);

+void	outTS(Hmesg, String*);

+void	outTsS(Hmesg, int, String*);

+void	outTsllS(Hmesg, int, long, long, String*);

+void	outTsll(Hmesg, int, long, long);

+void	outTsl(Hmesg, int, long);

+void	outTsv(Hmesg, int, vlong);

+void	outflush(void);

+int needoutflush(void);

+

+Posn	nlcount(File *f, Posn p0, Posn p1);

--- /dev/null

+++ b/sys/src/cmd/jam/shell.c

@@ -1,0 +1,190 @@

+#include "sam.h"

+#include "parse.h"

+

+extern	jmp_buf	mainloop;

+

+char	errfile[64];

+String	plan9cmd;	/* null terminated */

+Buffer	plan9buf;

+void	checkerrs(void);

+Buffer	cmdbuf;

+int	cmdbufpos;

+

+static void

+updateenv(File *f)

+{

+	static int fd = -1;

+	int n;

+	char buf[64], *p, *e;

+	

+	if(f == nil){

+		putenv("%", "");

+		putenv("%dot", "");

+		return;

+	}

+

+	p = Strtoc(&f->name);

+	putenv("%", p);

+	free(p);

+	

+	p = buf;

+	e = buf+sizeof(buf);

+	p = seprint(p, e, "%lud", 1+nlcount(f, 0, f->dot.r.p1));

+	p = seprint(p+1, e, "%lud", f->dot.r.p1);

+	p = seprint(p+1, e, "%lud", f->dot.r.p2);

+	n = p - buf;

+	if(fd == -1)

+	if((fd = create("/env/%dot", OWRITE, 0666)) < 0)

+		fprint(2, "updateenv create: %r\n");

+	if(write(fd, buf, n) != n)

+		fprint(2, "updateenv write: %r\n");

+}

+

+int

+plan9(File *f, int type, String *s, int nest)

+{

+	long l;

+	int m;

+	int pid, fd;

+	int retcode;

+	char *retmsg;

+	int pipe1[2], pipe2[2];

+

+	if(s->s[0]==0 && plan9cmd.s[0]==0)

+		error(Enocmd);

+	else if(s->s[0])

+		Strduplstr(&plan9cmd, s);

+	if(downloaded){

+		samerr(errfile);

+		remove(errfile);

+	}

+	if(type!='!' && pipe(pipe1)==-1)

+		error(Epipe);

+	if(type=='|' || type=='_')

+		snarf(f, addr.r.p1, addr.r.p2, &plan9buf, 1);

+	if((pid=fork()) == 0){

+		if(downloaded){	/* also put nasty fd's into errfile */

+			fd = create(errfile, 1, 0666L);

+			if(fd < 0)

+				fd = create("/dev/null", 1, 0666L);

+			dup(fd, 2);

+			close(fd);

+			/* 2 now points at err file */

+			if(type == '>')

+				dup(2, 1);

+			else if(type=='!'){

+				dup(2, 1);

+				fd = open("/dev/null", 0);

+				dup(fd, 0);

+				close(fd);

+			}

+		}

+		if(type != '!') {

+			if(type == '>')

+				dup(pipe1[0], 0);

+			else

+				dup(pipe1[1], 1);

+			close(pipe1[0]);

+			close(pipe1[1]);

+		}

+		if(type == '|' || type == '_'){

+			if(pipe(pipe2) == -1)

+				exits("pipe");

+			if((pid = fork())==0){

+				/*

+				 * It's ok if we get SIGPIPE here

+				 */

+				close(pipe2[0]);

+				io = pipe2[1];

+				if(retcode=!setjmp(mainloop)){	/* assignment = */

+					char *c;

+					for(l = 0; l<plan9buf.nc; l+=m){

+						m = plan9buf.nc-l;

+						if(m>BLOCKSIZE-1)

+							m = BLOCKSIZE-1;

+						bufread(&plan9buf, l, genbuf, m);

+						genbuf[m] = 0;

+						c = Strtoc(tmprstr(genbuf, m+1));

+						Write(pipe2[1], c, strlen(c));

+						free(c);

+					}

+				}

+				exits(retcode? "error" : 0);

+			}

+			if(pid==-1){

+				fprint(2, "Can't fork?!\n");

+				exits("fork");

+			}

+			dup(pipe2[0], 0);

+			close(pipe2[0]);

+			close(pipe2[1]);

+		}

+		if(type=='<' || type=='^'){

+			close(0);	/* so it won't read from terminal */

+			open("/dev/null", 0);

+		}

+		updateenv(f);

+		execl(SHPATH, SH, "-c", Strtoc(&plan9cmd), nil);

+		exits("exec");

+	}

+	if(pid == -1)

+		error(Efork);

+	if(type=='<' || type=='|'){

+		int nulls;

+		if(downloaded && addr.r.p1 != addr.r.p2)

+			outTl(Hsnarflen, addr.r.p2-addr.r.p1);

+		snarf(f, addr.r.p1, addr.r.p2, &snarfbuf, 0);

+		logdelete(f, addr.r.p1, addr.r.p2);

+		close(pipe1[1]);

+		io = pipe1[0];

+		f->tdot.p1 = -1;

+		f->ndot.r.p2 = addr.r.p2+readio(f, &nulls, 0, FALSE);

+		f->ndot.r.p1 = addr.r.p2;

+		closeio((Posn)-1);

+	}else if(type=='>'){

+		close(pipe1[0]);

+		io = pipe1[1];

+		bpipeok = 1;

+		writeio(f);

+		bpipeok = 0;

+		closeio((Posn)-1);

+	}else if(type == '^' || type == '_'){

+		int nulls;

+		close(pipe1[1]);

+		bufload(&cmdbuf, cmdbufpos, pipe1[0], &nulls);

+		close(pipe1[0]);

+	}

+	retmsg = waitfor(pid);

+	if(type=='|' || type=='<' || type=='_' || type=='^')

+		if(retmsg[0]!=0)

+			warn_s(Wbadstatus, retmsg);

+	if(downloaded)

+		checkerrs();

+	if(!nest)

+		dprint("!\n");

+	return retmsg[0] ? -1 : 0;

+}

+

+void

+checkerrs(void)

+{

+	char buf[256];

+	int f, n, nl;

+	char *p;

+	long l;

+

+	if(statfile(errfile, 0, 0, 0, &l, 0) > 0 && l != 0){

+		if((f=open((char *)errfile, 0)) != -1){

+			if((n=read(f, buf, sizeof buf-1)) > 0){

+				for(nl=0,p=buf; nl<3 && p<&buf[n]; p++)

+					if(*p=='\n')

+						nl++;

+				*p = 0;

+				dprint("%s", buf);

+				if(p-buf < l-1)

+					dprint("(jam: more in %s)\n", errfile);

+			}

+			close(f);

+		}

+	}

+}

--- /dev/null

+++ b/sys/src/cmd/jam/string.c

@@ -1,0 +1,193 @@

+#include "sam.h"

+

+#define	MINSIZE	16		/* minimum number of chars allocated */

+#define	MAXSIZE	256		/* maximum number of chars for an empty string */

+

+

+void

+Strinit(String *p)

+{

+	p->s = emalloc(MINSIZE*RUNESIZE);

+	p->n = 0;

+	p->size = MINSIZE;

+}

+

+void

+Strinit0(String *p)

+{

+	p->s = emalloc(MINSIZE*RUNESIZE);

+	p->s[0] = 0;

+	p->n = 1;

+	p->size = MINSIZE;

+}

+

+void

+Strclose(String *p)

+{

+	free(p->s);

+}

+

+void

+Strzero(String *p)

+{

+	if(p->size > MAXSIZE){

+		p->s = erealloc(p->s, RUNESIZE*MAXSIZE); /* throw away the garbage */

+		p->size = MAXSIZE;

+	}

+	p->n = 0;

+}

+

+int

+Strlen(Rune *r)

+{

+	Rune *s;

+

+	for(s=r; *s; s++)

+		;

+	return s-r;

+}

+

+void

+Strdupl(String *p, Rune *s)	/* copies the null */

+{

+	p->n = Strlen(s)+1;

+	Strinsure(p, p->n);

+	memmove(p->s, s, p->n*RUNESIZE);

+}

+

+void

+Strduplstr(String *p, String *q)	/* will copy the null if there's one there */

+{

+	Strinsure(p, q->n);

+	p->n = q->n;

+	memmove(p->s, q->s, q->n*RUNESIZE);

+}

+

+void

+Straddc(String *p, int c)

+{

+	Strinsure(p, p->n+1);

+	p->s[p->n++] = c;

+}

+

+void

+Strinsure(String *p, ulong n)

+{

+	if(n > STRSIZE)

+		error(Etoolong);

+	if(p->size < n){	/* p needs to grow */

+		n += 100;

+		p->s = erealloc(p->s, n*RUNESIZE);

+		p->size = n;

+	}

+}

+

+void

+Strinsert(String *p, String *q, Posn p0)

+{

+	Strinsure(p, p->n+q->n);

+	memmove(p->s+p0+q->n, p->s+p0, (p->n-p0)*RUNESIZE);

+	memmove(p->s+p0, q->s, q->n*RUNESIZE);

+	p->n += q->n;

+}

+

+void

+Strdelete(String *p, Posn p1, Posn p2)

+{

+	memmove(p->s+p1, p->s+p2, (p->n-p2)*RUNESIZE);

+	p->n -= p2-p1;

+}

+

+int

+Strcmp(String *a, String *b)

+{

+	int i, c;

+

+	for(i=0; i<a->n && i<b->n; i++)

+		if(c = (a->s[i] - b->s[i]))	/* assign = */

+			return c;

+	/* damn NULs confuse everything */

+	i = a->n - b->n;

+	if(i == 1){

+		if(a->s[a->n-1] == 0)

+			return 0;

+	}else if(i == -1){

+		if(b->s[b->n-1] == 0)

+			return 0;

+	}

+	return i;

+}

+

+int

+Strispre(String *a, String *b)

+{

+	int i;

+

+	for(i=0; i<a->n && i<b->n; i++){

+		if(a->s[i] - b->s[i]){	/* assign = */

+			if(a->s[i] == 0)

+				return 1;

+			return 0;

+		}

+	}

+	return i == a->n;

+}

+

+char*

+Strtoc(String *s)

+{

+	int i;

+	char *c, *d;

+	Rune *r;

+	c = emalloc(s->n*UTFmax + 1);  /* worst case UTFmax bytes per rune, plus NUL */

+	d = c;

+	r = s->s;

+	for(i=0; i<s->n; i++)

+		d += runetochar(d, r++);

+	if(d==c || d[-1]!=0)

+		*d = 0;

+	return c;

+

+}

+

+/*

+ * Build very temporary String from Rune*

+ */

+String*

+tmprstr(Rune *r, int n)

+{

+	static String p;

+

+	p.s = r;

+	p.n = n;

+	p.size = n;

+	return &p;

+}

+

+/*

+ * Convert null-terminated char* into String

+ */

+String*

+tmpcstr(char *s)

+{

+	String *p;

+	Rune *r;

+	int i, n;

+

+	n = utflen(s);	/* don't include NUL */

+	p = emalloc(sizeof(String));

+	r = emalloc(n*RUNESIZE);

+	p->s = r;

+	for(i=0; i<n; i++,r++)

+		s += chartorune(r, s);

+	p->n = n;

+	p->size = n;

+	return p;

+}

+

+void

+freetmpstr(String *s)

+{

+	free(s->s);

+	free(s);

+}

--- /dev/null

+++ b/sys/src/cmd/jam/sys.c

@@ -1,0 +1,60 @@

+#include "sam.h"

+

+static int inerror=FALSE;

+

+/*

+ * A reasonable interface to the system calls

+ */

+

+void

+resetsys(void)

+{

+	inerror = FALSE;

+}

+

+void

+syserror(char *a)

+{

+	char buf[ERRMAX];

+

+	if(!inerror){

+		inerror=TRUE;

+		errstr(buf, sizeof buf);

+		dprint("%s: ", a);

+		error_s(Eio, buf);

+	}

+}

+

+int

+Read(int f, void *a, int n)

+{

+	char buf[ERRMAX];

+

+	if(read(f, (char *)a, n)!=n) {

+		if (lastfile)

+			lastfile->rescuing = 1;

+		errstr(buf, sizeof buf);

+		if (downloaded)

+			fprint(2, "read error: %s\n", buf);

+		rescue();

+		exits("read");

+	}

+	return n;

+}

+

+int

+Write(int f, void *a, int n)

+{

+	int m;

+

+	if((m=write(f, (char *)a, n))!=n)

+		syserror("write");

+	return m;

+}

+

+void

+Seek(int f, long n, int w)

+{

+	if(seek(f, n, w)==-1)

+		syserror("seek");

+}

--- /dev/null

+++ b/sys/src/cmd/jam/util.c

@@ -1,0 +1,54 @@

+#include "sam.h"

+

+void

+cvttorunes(char *p, int n, Rune *r, int *nb, int *nr, int *nulls)

+{

+	uchar *q;

+	Rune *s;

+	int j, w;

+

+	/*

+	 * Always guaranteed that n bytes may be interpreted

+	 * without worrying about partial runes.  This may mean

+	 * reading up to UTFmax-1 more bytes than n; the caller

+	 * knows this.  If n is a firm limit, the caller should

+	 * set p[n] = 0.

+	 */

+	q = (uchar*)p;

+	s = r;

+	for(j=0; j<n; j+=w){

+		if(*q < Runeself){

+			w = 1;

+			*s = *q++;

+		}else{

+			w = chartorune(s, (char*)q);

+			q += w;

+		}

+		if(*s)

+			s++;

+		else if(nulls)

+			*nulls = TRUE;

+	}

+	*nb = (char*)q-p;

+	*nr = s-r;

+}

+

+void*

+fbufalloc(void)

+{

+	return emalloc(BUFSIZE);

+}

+

+void

+fbuffree(void *f)

+{

+	free(f);

+}

+

+uint

+min(uint a, uint b)

+{

+	if(a < b)

+		return a;

+	return b;

+}

--- /dev/null

+++ b/sys/src/cmd/jam/xec.c

@@ -1,0 +1,520 @@

+#include "sam.h"

+#include "parse.h"

+

+int	Glooping;

+int	nest;

+

+int	append(File*, Cmd*, Posn);

+int	display(File*);

+void	looper(File*, Cmd*, int);

+void	filelooper(Cmd*, int);

+void	linelooper(File*, Cmd*);

+

+void

+resetxec(void)

+{

+	Glooping = nest = 0;

+}

+

+int

+cmdexec(File *f, Cmd *cp)

+{

+	int i;

+	Addr *ap;

+	Address a;

+

+	if(f && f->unread)

+		load(f);

+	if(f==0 && (cp->addr==0 || cp->addr->type!='"') &&

+	    !utfrune("bBnqUXY!^", cp->cmdc) &&

+	    cp->cmdc!=('c'|0x100) && !(cp->cmdc=='D' && cp->ctext))

+		error(Enofile);

+	i = lookup(cp->cmdc);

+	if(i >= 0 && cmdtab[i].defaddr != aNo){

+		if((ap=cp->addr)==0 && cp->cmdc!='\n'){

+			cp->addr = ap = newaddr();

+			ap->type = '.';

+			if(cmdtab[i].defaddr == aAll)

+				ap->type = '*';

+		}else if(ap && ap->type=='"' && ap->next==0 && cp->cmdc!='\n'){

+			ap->next = newaddr();

+			ap->next->type = '.';

+			if(cmdtab[i].defaddr == aAll)

+				ap->next->type = '*';

+		}

+		if(cp->addr){	/* may be false for '\n' (only) */

+			static Address none = {0,0,0};

+			if(f)

+				addr = address(ap, f->dot, 0);

+			else	/* a " */

+				addr = address(ap, none, 0);

+			f = addr.f;

+		}

+	}

+	current(f);

+	switch(cp->cmdc){

+	case '{':

+		a = cp->addr? address(cp->addr, f->dot, 0): f->dot;

+		for(cp = cp->ccmd; cp; cp = cp->next){

+			a.f->dot = a;

+			cmdexec(a.f, cp);

+		}

+		break;

+	default:

+		i=(*cmdtab[i].fn)(f, cp);

+		return i;

+	}

+	return 1;

+}

+

+

+int

+a_cmd(File *f, Cmd *cp)

+{

+	return append(f, cp, addr.r.p2);

+}

+

+int

+b_cmd(File *f, Cmd *cp)

+{

+	USED(f);

+	f = cp->cmdc=='b'? tofile(cp->ctext) : getfile(cp->ctext);

+	if(f->unread)

+		load(f);

+	else if(nest == 0)

+		filename(f);

+	return TRUE;

+}

+

+int

+c_cmd(File *f, Cmd *cp)

+{

+	logdelete(f, addr.r.p1, addr.r.p2);

+	f->ndot.r.p1 = f->ndot.r.p2 = addr.r.p2;

+	return append(f, cp, addr.r.p2);

+}

+

+int

+d_cmd(File *f, Cmd *cp)

+{

+	USED(cp);

+	logdelete(f, addr.r.p1, addr.r.p2);

+	f->ndot.r.p1 = f->ndot.r.p2 = addr.r.p1;

+	return TRUE;

+}

+

+int

+D_cmd(File *f, Cmd *cp)

+{

+	closefiles(f, cp->ctext);

+	return TRUE;

+}

+

+int

+e_cmd(File *f, Cmd *cp)

+{

+	if(getname(f, cp->ctext, cp->cmdc=='e')==0)

+		error(Enoname);

+	edit(f, cp->cmdc);

+	return TRUE;

+}

+

+int

+f_cmd(File *f, Cmd *cp)

+{

+	getname(f, cp->ctext, TRUE);

+	filename(f);

+	return TRUE;

+}

+

+int

+g_cmd(File *f, Cmd *cp)

+{

+	if(f!=addr.f)panic("g_cmd f!=addr.f");

+	compile(cp->re);

+	if(execute(f, addr.r.p1, addr.r.p2) ^ cp->cmdc=='v'){

+		f->dot = addr;

+		return cmdexec(f, cp->ccmd);

+	}

+	return TRUE;

+}

+

+int

+i_cmd(File *f, Cmd *cp)

+{

+	return append(f, cp, addr.r.p1);

+}

+

+int

+k_cmd(File *f, Cmd *cp)

+{

+	USED(cp);

+	f->mark = addr.r;

+	return TRUE;

+}

+

+int

+m_cmd(File *f, Cmd *cp)

+{

+	Address addr2;

+

+	addr2 = address(cp->caddr, f->dot, 0);

+	if(cp->cmdc=='m')

+		move(f, addr2);

+	else

+		copy(f, addr2);

+	return TRUE;

+}

+

+int

+M_cmd(File *f, Cmd *cp)

+{

+	USED(f);

+	if(downloaded)

+		outTS(Hmenucmd, cp->ctext);

+	else

+		dprint("not downloaded\n");

+	return TRUE;

+}

+

+int

+n_cmd(File *f, Cmd *cp)

+{

+	int i;

+	USED(f);

+	USED(cp);

+	for(i = 0; i<file.nused; i++){

+		if(file.filepptr[i] == cmd)

+			continue;

+		f = file.filepptr[i];

+		Strduplstr(&genstr, &f->name);

+		filename(f);

+	}

+	return TRUE;

+}

+

+int

+p_cmd(File *f, Cmd *cp)

+{

+	USED(cp);

+	return display(f);

+}

+

+int

+q_cmd(File *f, Cmd *cp)

+{

+	USED(cp);

+	USED(f);

+	trytoquit();

+	if(downloaded){

+		outT0(Hexit);

+		return TRUE;

+	}

+	return FALSE;

+}

+

+int

+s_cmd(File *f, Cmd *cp)

+{

+	int i, j, c, n;

+	Posn p1, op, didsub = 0, delta = 0;

+

+	n = cp->num;

+	op= -1;

+	compile(cp->re);

+	for(p1 = addr.r.p1; p1<=addr.r.p2 && execute(f, p1, addr.r.p2); ){

+		if(sel.p[0].p1==sel.p[0].p2){	/* empty match? */

+			if(sel.p[0].p1==op){

+				p1++;

+				continue;

+			}

+			p1 = sel.p[0].p2+1;

+		}else

+			p1 = sel.p[0].p2;

+		op = sel.p[0].p2;

+		if(--n>0)

+			continue;

+		Strzero(&genstr);

+		for(i = 0; i<cp->ctext->n; i++)

+			if((c = cp->ctext->s[i])=='\\' && i<cp->ctext->n-1){

+				c = cp->ctext->s[++i];

+				if('1'<=c && c<='9') {

+					j = c-'0';

+					if(sel.p[j].p2-sel.p[j].p1>BLOCKSIZE)

+						error(Elongtag);

+					bufread(f, sel.p[j].p1, genbuf, sel.p[j].p2-sel.p[j].p1);

+					Strinsert(&genstr, tmprstr(genbuf, (sel.p[j].p2-sel.p[j].p1)), genstr.n);

+				}else

+				 	Straddc(&genstr, c);

+			}else if(c!='&')

+				Straddc(&genstr, c);

+			else{

+				if(sel.p[0].p2-sel.p[0].p1>BLOCKSIZE)

+					error(Elongrhs);

+				bufread(f, sel.p[0].p1, genbuf, sel.p[0].p2-sel.p[0].p1);

+				Strinsert(&genstr,

+					tmprstr(genbuf, (int)(sel.p[0].p2-sel.p[0].p1)),

+					genstr.n);

+			}

+		if(sel.p[0].p1!=sel.p[0].p2){

+			logdelete(f, sel.p[0].p1, sel.p[0].p2);

+			delta-=sel.p[0].p2-sel.p[0].p1;

+		}

+		if(genstr.n){

+			loginsert(f, sel.p[0].p2, genstr.s, genstr.n);

+			delta+=genstr.n;

+		}

+		didsub = 1;

+		if(!cp->flag)

+			break;

+	}

+	if(!didsub && nest==0)

+		error(Enosub);

+	f->ndot.r.p1 = addr.r.p1, f->ndot.r.p2 = addr.r.p2+delta;

+	return TRUE;

+}

+

+int

+u_cmd(File *f, Cmd *cp)

+{

+	int n;

+

+	USED(f);

+	USED(cp);

+	n = cp->num;

+	if(n >= 0)

+		while(n-- && undo(TRUE))

+			;

+	else

+		while(n++ && undo(FALSE))

+			;

+	moveto(f, f->dot.r);

+	return TRUE;

+}

+

+int

+w_cmd(File *f, Cmd *cp)

+{

+	int fseq;

+

+	fseq = f->seq;

+	if(getname(f, cp->ctext, FALSE)==0)

+		error(Enoname);

+	if(fseq == seq)

+		error_s(Ewseq, genc);

+	writef(f);

+	return TRUE;

+}

+

+int

+x_cmd(File *f, Cmd *cp)

+{

+	if(cp->re)

+		looper(f, cp, cp->cmdc=='x');

+	else

+		linelooper(f, cp);

+	return TRUE;

+}

+

+int

+X_cmd(File *f, Cmd *cp)

+{

+	USED(f);

+	filelooper(cp, cp->cmdc=='X');

+	return TRUE;

+}

+

+int

+plan9_cmd(File *f, Cmd *cp)

+{

+	plan9(f, cp->cmdc, cp->ctext, nest);

+	return TRUE;

+}

+

+int

+eq_cmd(File *f, Cmd *cp)

+{

+	int charsonly;

+

+	switch(cp->ctext->n){

+	case 1:

+		charsonly = FALSE;

+		break;

+	case 2:

+		if(cp->ctext->s[0]=='#'){

+			charsonly = TRUE;

+			break;

+		}

+	default:

+		SET(charsonly);

+		error(Enewline);

+	}

+	printposn(f, charsonly);

+	return TRUE;

+}

+

+int

+nl_cmd(File *f, Cmd *cp)

+{

+	Address a;

+

+	if(cp->addr == 0){

+		/* First put it on newline boundaries */

+		addr = lineaddr((Posn)0, f->dot, -1);

+		a = lineaddr((Posn)0, f->dot, 1);

+		addr.r.p2 = a.r.p2;

+		if(addr.r.p1==f->dot.r.p1 && addr.r.p2==f->dot.r.p2)

+			addr = lineaddr((Posn)1, f->dot, 1);

+		display(f);

+	}else if(downloaded)

+		moveto(f, addr.r);

+	else

+		display(f);

+	return TRUE;

+}

+

+int

+cd_cmd(File *f, Cmd *cp)

+{

+	USED(f);

+	cd(cp->ctext);

+	return TRUE;

+}

+

+int

+append(File *f, Cmd *cp, Posn p)

+{

+	if(cp->ctext->n>0 && cp->ctext->s[cp->ctext->n-1]==0)

+		--cp->ctext->n;

+	if(cp->ctext->n>0)

+		loginsert(f, p, cp->ctext->s, cp->ctext->n);

+	f->ndot.r.p1 = p;

+	f->ndot.r.p2 = p+cp->ctext->n;

+	return TRUE;

+}

+

+int

+display(File *f)

+{

+	Posn p1, p2;

+	int np;

+	char *c;

+

+	p1 = addr.r.p1;

+	p2 = addr.r.p2;

+	if(p2 > f->nc){

+		fprint(2, "bad display addr p1=%ld p2=%ld f->nc=%d\n", p1, p2, f->nc); /*ZZZ should never happen, can remove */

+		p2 = f->nc;

+	}

+	while(p1 < p2){

+		np = p2-p1;

+		if(np>BLOCKSIZE-1)

+			np = BLOCKSIZE-1;

+		bufread(f, p1, genbuf, np);

+		genbuf[np] = 0;

+		c = Strtoc(tmprstr(genbuf, np+1));

+		if(downloaded)

+			termwrite(c);

+		else

+			Write(1, c, strlen(c));

+		free(c);

+		p1 += np;

+	}

+	f->dot = addr;

+	return TRUE;

+}

+

+void

+looper(File *f, Cmd *cp, int xy)

+{

+	Posn p, op;

+	Range r;

+

+	r = addr.r;

+	op= xy? -1 : r.p1;

+	nest++;

+	compile(cp->re);

+	for(p = r.p1; p<=r.p2; ){

+		if(!execute(f, p, r.p2)){ /* no match, but y should still run */

+			if(xy || op>r.p2)

+				break;

+			f->dot.r.p1 = op, f->dot.r.p2 = r.p2;

+			p = r.p2+1;	/* exit next loop */

+		}else{

+			if(sel.p[0].p1==sel.p[0].p2){	/* empty match? */

+				if(sel.p[0].p1==op){

+					p++;

+					continue;

+				}

+				p = sel.p[0].p2+1;

+			}else

+				p = sel.p[0].p2;

+			if(xy)

+				f->dot.r = sel.p[0];

+			else

+				f->dot.r.p1 = op, f->dot.r.p2 = sel.p[0].p1;

+		}

+		op = sel.p[0].p2;

+		cmdexec(f, cp->ccmd);

+		compile(cp->re);

+	}

+	--nest;

+}

+

+void

+linelooper(File *f, Cmd *cp)

+{

+	Posn p;

+	Range r, linesel;

+	Address a, a3;

+

+	nest++;

+	r = addr.r;

+	a3.f = f;

+	a3.r.p1 = a3.r.p2 = r.p1;

+	for(p = r.p1; p<r.p2; p = a3.r.p2){

+		a3.r.p1 = a3.r.p2;

+/*pjw		if(p!=r.p1 || (linesel = lineaddr((Posn)0, a3, 1)).r.p2==p)*/

+		if(p!=r.p1 || (a = lineaddr((Posn)0, a3, 1), linesel = a.r, linesel.p2==p)){

+			a = lineaddr((Posn)1, a3, 1);

+			linesel = a.r;

+		}

+		if(linesel.p1 >= r.p2)

+			break;

+		if(linesel.p2 >= r.p2)

+			linesel.p2 = r.p2;

+		if(linesel.p2 > linesel.p1)

+			if(linesel.p1>=a3.r.p2 && linesel.p2>a3.r.p2){

+				f->dot.r = linesel;

+				cmdexec(f, cp->ccmd);

+				a3.r = linesel;

+				continue;

+			}

+		break;

+	}

+	--nest;

+}

+

+void

+filelooper(Cmd *cp, int XY)

+{

+	File *f, *cur;

+	int i;

+

+	if(Glooping++)

+		error(EnestXY);

+	nest++;

+	settempfile();

+	cur = curfile;

+	for(i = 0; i<tempfile.nused; i++){

+		f = tempfile.filepptr[i];

+		if(f==cmd)

+			continue;

+		if(cp->re==0 || filematch(f, cp->re)==XY)

+			cmdexec(f, cp->ccmd);

+	}

+	if(cur && whichmenu(cur)>=0)	/* check that cur is still a file */

+		current(cur);

+	--Glooping;

+	--nest;

+}

--- /dev/null

+++ b/sys/src/cmd/jamterm/flayer.c

@@ -1,0 +1,512 @@

+#include <u.h>

+#include <libc.h>

+#include <draw.h>

+#include <thread.h>

+#include <mouse.h>

+#include <keyboard.h>

+#include <frame.h>

+#include "flayer.h"

+#include "samterm.h"

+

+#define	DELTA	10

+

+static Flayer	**llist;	/* front to back */

+static int	nllist;

+static int	nlalloc;

+static Rectangle lDrect;

+

+Vis		visibility(Flayer *);

+void		newvisibilities(int);

+void		llinsert(Flayer*);

+void		lldelete(Flayer*);

+

+Image	*maincols[NCOL];

+Image	*cmdcols[NCOL];

+

+void

+flstart(Rectangle r)

+{

+	int i;

+

+	enum{

+		CBACK = HTEXT + 1,

+		CHIGH,

+		CBORD,

+		CTEXT,

+		CHTEXT,

+		Ncols,

+	};

+	Theme th[Ncols] = {

+		[BACK] { "back",	0xFFFFEAFF },

+		[HIGH] { "high",	DDarkyellow },

+		[BORD]	{ "border",	DYellowgreen },

+		[TEXT]	{ "text",	DBlack },

+		[HTEXT]{ "back",	DBlack },

+		[CBACK] { "menuback",	0xEAFFFFFF },

+		[CHIGH] { "menuhigh",	DPalegreen },

+		[CBORD]	{ "lhold",	DPurpleblue },

+		[CTEXT]	{ "hold",	DBlack },

+		[CHTEXT]{ "menuhtext",	DBlack },

+	};

+	readtheme(th, nelem(th), nil);

+	lDrect = r;

+	for(i=0; i<NCOL; i++){

+		r = i == BORD ? Rect(0,0,2,2) : Rect(0,0,1,1);

+ 		maincols[i] = allocimage(display, r, screen->chan, 1, th[i].c);

+ 		cmdcols[i] = allocimage(display, r, screen->chan, 1, th[CBACK+i].c);

+	}

+}

+

+void

+flnew(Flayer *l, Rune *(*fn)(Flayer*, long, ulong*), int u0, void *u1)

+{

+	if(nllist == nlalloc){

+		nlalloc += DELTA;

+		llist = realloc(llist, nlalloc*sizeof(Flayer**));

+		if(llist == 0)

+			panic("flnew");

+	}

+	l->textfn = fn;

+	l->user0 = u0;

+	l->user1 = u1;

+	l->lastsr = ZR;

+	llinsert(l);

+}

+

+Rectangle

+flrect(Flayer *l, Rectangle r)

+{

+	rectclip(&r, lDrect);

+	l->entire = r;

+	l->scroll = insetrect(r, FLMARGIN);

+	r.min.x =

+	 l->scroll.max.x = r.min.x+FLMARGIN+FLSCROLLWID+(FLGAP-FLMARGIN);

+	return r;

+}

+

+void

+flinit(Flayer *l, Rectangle r, Font *ft, Image **cols)

+{

+	Rectangle wr;

+

+	lldelete(l);

+	llinsert(l);

+	l->visible = All;

+	l->origin = l->p0 = l->p1 = 0;

+	frinit(&l->f, insetrect(flrect(l, r), FLMARGIN), ft, screen, cols);

+	l->f.maxtab = maxtab*stringwidth(ft, "0");

+	newvisibilities(1);

+	draw(screen, l->entire, l->f.cols[BACK], nil, ZP);

+	scrdraw(l, 0L);

+	flborder(l, 0);

+	wr = rectsubpt(l->entire, screen->r.min);

+	l->warpto = addpt(wr.min, divpt(subpt(wr.max, wr.min), 2));

+}

+

+void

+flclose(Flayer *l)

+{

+	if(l->visible == All)

+		draw(screen, l->entire, maincols[BACK], nil, ZP);

+	else if(l->visible == Some){

+		if(l->f.b == 0)

+			l->f.b = allocimage(display, l->entire, screen->chan, 0, DNofill);

+		if(l->f.b){

+			draw(l->f.b, l->entire, maincols[BACK], nil, ZP);

+			flrefresh(l, l->entire, 0);

+		}

+	}

+	frclear(&l->f, 1);

+	lldelete(l);

+	if(l->f.b && l->visible!=All)

+		freeimage(l->f.b);

+	l->textfn = 0;

+	newvisibilities(1);

+}

+

+void

+flborder(Flayer *l, int wide)

+{

+	if(flprepare(l)){

+		border(l->f.b, l->entire, FLMARGIN, l->f.cols[BACK], ZP);

+		if(wide)

+			border(l->f.b, l->entire, FLMARGIN, cmdcols[BORD], ZP);

+		else

+			border(l->f.b, l->entire, 1, l->f.cols[BORD], ZP);

+		if(l->visible==Some)

+			flrefresh(l, l->entire, 0);

+	}

+}

+

+Flayer *

+flwhich(Point p)

+{

+	int i;

+

+	if(p.x==0 && p.y==0)

+		return nllist? llist[0] : 0;

+	for(i=0; i<nllist; i++)

+		if(ptinrect(p, llist[i]->entire))

+			return llist[i];

+	return 0;

+}

+

+void

+flupfront(Flayer *l)

+{

+	int v = l->visible;

+

+	lldelete(l);

+	llinsert(l);

+	if(v!=All)

+		newvisibilities(0);

+}

+

+void

+newvisibilities(int redraw)

+	/* if redraw false, we know it's a flupfront, and needn't

+	 * redraw anyone becoming partially covered */

+{

+	int i;

+	Vis ov;

+	Flayer *l;

+

+	for(i = 0; i<nllist; i++){

+		l = llist[i];

+		l->lastsr = ZR;	/* make sure scroll bar gets redrawn */

+		ov = l->visible;

+		l->visible = visibility(l);

+#define	V(a, b)	(((a)<<2)|((b)))

+		switch(V(ov, l->visible)){

+		case V(Some, None):

+			if(l->f.b)

+				freeimage(l->f.b);

+		case V(All, None):

+		case V(All, Some):

+			l->f.b = 0;

+			frclear(&l->f, 0);

+			break;

+

+		case V(Some, Some):

+			if(l->f.b==0 && redraw)

+		case V(None, Some):

+				flprepare(l);

+			if(l->f.b && redraw){

+				flrefresh(l, l->entire, 0);

+				freeimage(l->f.b);

+				l->f.b = 0;

+				frclear(&l->f, 0);

+			}

+		case V(None, None):

+		case V(All, All):

+			break;

+

+		case V(Some, All):

+			if(l->f.b){

+				draw(screen, l->entire, l->f.b, nil, l->entire.min);

+				freeimage(l->f.b);

+				l->f.b = screen;

+				break;

+			}

+		case V(None, All):

+			flprepare(l);

+			break;

+		}

+		if(ov==None && l->visible!=None)

+			flnewlyvisible(l);

+	}

+}

+

+void

+llinsert(Flayer *l)

+{

+	int i;

+	for(i=nllist; i>0; --i)

+		llist[i]=llist[i-1];

+	llist[0]=l;

+	nllist++;

+}

+

+void

+lldelete(Flayer *l)

+{

+	int i;

+

+	for(i=0; i<nllist; i++)

+		if(llist[i]==l){

+			--nllist;

+			for(; i<nllist; i++)

+				llist[i] = llist[i+1];

+			return;

+		}

+	panic("lldelete");

+}

+

+void

+flinsert(Flayer *l, Rune *sp, Rune *ep, long p0)

+{

+	if(flprepare(l)){

+		frinsert(&l->f, sp, ep, p0-l->origin);

+		scrdraw(l, scrtotal(l));

+		if(l->visible==Some)

+			flrefresh(l, l->entire, 0);

+	}

+}

+

+void

+fldelete(Flayer *l, long p0, long p1)

+{

+	if(flprepare(l)){

+		p0 -= l->origin;

+		if(p0 < 0)

+			p0 = 0;

+		p1 -= l->origin;

+		if(p1<0)

+			p1 = 0;

+		frdelete(&l->f, p0, p1);

+		scrdraw(l, scrtotal(l));

+		if(l->visible==Some)

+			flrefresh(l, l->entire, 0);

+	}

+}

+

+int

+flselect(Flayer *l, ulong *p)

+{

+	static int clickcount;

+	static Point clickpt = {-10, -10};

+	int dt, dx, dy;

+

+	if(l->visible!=All)

+		flupfront(l);

+	dt = mousep->msec - l->click;

+	dx = abs(mousep->xy.x - clickpt.x);

+	dy = abs(mousep->xy.y - clickpt.y);

+	*p = frcharofpt(&l->f, mousep->xy) + l->origin;

+

+	l->click = mousep->msec;

+	clickpt = mousep->xy;

+

+	if(dx < 3 && dy < 3 && dt < Clicktime && clickcount < 3)

+		return ++clickcount;

+	clickcount = 0;

+

+	frselect(&l->f, mousectl);

+	l->p0 = l->f.p0+l->origin;

+	l->p1 = l->f.p1+l->origin;

+	return 0;

+}

+

+void

+flsetselect(Flayer *l, long p0, long p1)

+{

+	ulong fp0, fp1;

+

+	if(l->visible==None || !flprepare(l)){

+		l->p0 = p0, l->p1 = p1;

+		return;

+	}

+	l->p0 = p0, l->p1 = p1;

+	flfp0p1(l, &fp0, &fp1);

+	if(fp0==l->f.p0 && fp1==l->f.p1)

+		return;

+

+	if(fp1<=l->f.p0 || fp0>=l->f.p1 || l->f.p0==l->f.p1 || fp0==fp1){

+		/* no overlap or trivial repainting */

+		frdrawsel(&l->f, frptofchar(&l->f, l->f.p0), l->f.p0, l->f.p1, 0);

+		frdrawsel(&l->f, frptofchar(&l->f, fp0), fp0, fp1, 1);

+		goto Refresh;

+	}

+	/* the current selection and the desired selection overlap and are both non-empty */

+	if(fp0 < l->f.p0){

+		/* extend selection backwards */

+		frdrawsel(&l->f, frptofchar(&l->f, fp0), fp0, l->f.p0, 1);

+	}else if(fp0 > l->f.p0){

+		/* trim first part of selection */

+		frdrawsel(&l->f, frptofchar(&l->f, l->f.p0), l->f.p0, fp0, 0);

+	}

+	if(fp1 > l->f.p1){

+		/* extend selection forwards */

+		frdrawsel(&l->f, frptofchar(&l->f, l->f.p1), l->f.p1, fp1, 1);

+	}else if(fp1 < l->f.p1){

+		/* trim last part of selection */

+		frdrawsel(&l->f, frptofchar(&l->f, fp1), fp1, l->f.p1, 0);

+	}

+

+    Refresh:

+	l->f.p0 = fp0;

+	l->f.p1 = fp1;

+	if(l->visible==Some)

+		flrefresh(l, l->entire, 0);

+}

+

+void

+flfp0p1(Flayer *l, ulong *pp0, ulong *pp1)

+{

+	long p0 = l->p0-l->origin, p1 = l->p1-l->origin;

+

+	if(p0 < 0)

+		p0 = 0;

+	if(p1 < 0)

+		p1 = 0;

+	if(p0 > l->f.nchars)

+		p0 = l->f.nchars;

+	if(p1 > l->f.nchars)

+		p1 = l->f.nchars;

+	*pp0 = p0;

+	*pp1 = p1;

+}

+

+Rectangle

+rscale(Rectangle r, Point old, Point new)

+{

+	r.min.x = r.min.x*new.x/old.x;

+	r.min.y = r.min.y*new.y/old.y;

+	r.max.x = r.max.x*new.x/old.x;

+	r.max.y = r.max.y*new.y/old.y;

+	return r;

+}

+

+void

+flresize(Rectangle dr)

+{

+	int i;

+	Flayer *l;

+	Frame *f;

+	Rectangle r, olDrect;

+	int move;

+

+	olDrect = lDrect;

+	lDrect = dr;

+	move = 0;

+	/* no moving on rio; must repaint */

+	if(0 && Dx(dr)==Dx(olDrect) && Dy(dr)==Dy(olDrect))

+		move = 1;

+	else

+		draw(screen, lDrect, maincols[BACK], nil, ZP);

+	for(i=0; i<nllist; i++){

+		l = llist[i];

+		l->lastsr = ZR;

+		f = &l->f;

+		if(move)

+			r = rectaddpt(rectsubpt(l->entire, olDrect.min), dr.min);

+		else{

+			r = rectaddpt(rscale(rectsubpt(l->entire, olDrect.min),

+				subpt(olDrect.max, olDrect.min),

+				subpt(dr.max, dr.min)), dr.min);

+			if(l->visible==Some && f->b){

+				freeimage(f->b);

+				frclear(f, 0);

+			}

+			f->b = 0;

+			if(l->visible!=None)

+				frclear(f, 0);

+		}

+		if(!rectclip(&r, dr))

+			panic("flresize");

+		if(r.max.x-r.min.x<100)

+			r.min.x = dr.min.x;

+		if(r.max.x-r.min.x<100)

+			r.max.x = dr.max.x;

+		if(r.max.y-r.min.y<2*FLMARGIN+f->font->height)

+			r.min.y = dr.min.y;

+		if(r.max.y-r.min.y<2*FLMARGIN+f->font->height)

+			r.max.y = dr.max.y;

+		if(!move)

+			l->visible = None;

+		frsetrects(f, insetrect(flrect(l, r), FLMARGIN), f->b);

+		if(!move && f->b)

+			scrdraw(l, scrtotal(l));

+	}

+	newvisibilities(1);

+}

+

+int

+flprepare(Flayer *l)

+{

+	Frame *f;

+	ulong n;

+	Rune *r;

+

+	if(l->visible == None)

+		return 0;

+	f = &l->f;

+	if(f->b == 0){

+		if(l->visible == All)

+			f->b = screen;

+		else if((f->b = allocimage(display, l->entire, screen->chan, 0, 0))==0)

+			return 0;

+		draw(f->b, l->entire, f->cols[BACK], nil, ZP);

+		border(f->b, l->entire, l==llist[0]? FLMARGIN : 1, f->cols[BORD], ZP);

+		n = f->nchars;

+		frinit(f, f->entire, f->font, f->b, 0);

+		f->maxtab = maxtab*stringwidth(f->font, "0");

+		r = (*l->textfn)(l, n, &n);

+		frinsert(f, r, r+n, (ulong)0);

+		frdrawsel(f, frptofchar(f, f->p0), f->p0, f->p1, 0);

+		flfp0p1(l, &f->p0, &f->p1);

+		frdrawsel(f, frptofchar(f, f->p0), f->p0, f->p1, 1);

+		l->lastsr = ZR;

+		scrdraw(l, scrtotal(l));

+	}

+	return 1;

+}

+

+static	int	somevis, someinvis, justvis;

+

+Vis

+visibility(Flayer *l)

+{

+	somevis = someinvis = 0;

+	justvis = 1;

+	flrefresh(l, l->entire, 0);

+	justvis = 0;

+	if(somevis==0)

+		return None;

+	if(someinvis==0)

+		return All;

+	return Some;

+}

+

+void

+flrefresh(Flayer *l, Rectangle r, int i)

+{

+	Flayer *t;

+	Rectangle s;

+

+    Top:

+	if((t=llist[i++]) == l){

+		if(!justvis)

+			draw(screen, r, l->f.b, nil, r.min);

+		somevis = 1;

+	}else{

+		if(!rectXrect(t->entire, r))

+			goto Top;	/* avoid stacking unnecessarily */

+		if(t->entire.min.x>r.min.x){

+			s = r;

+			s.max.x = t->entire.min.x;

+			flrefresh(l, s, i);

+			r.min.x = t->entire.min.x;

+		}

+		if(t->entire.min.y>r.min.y){

+			s = r;

+			s.max.y = t->entire.min.y;

+			flrefresh(l, s, i);

+			r.min.y = t->entire.min.y;

+		}

+		if(t->entire.max.x<r.max.x){

+			s = r;

+			s.min.x = t->entire.max.x;

+			flrefresh(l, s, i);

+			r.max.x = t->entire.max.x;

+		}

+		if(t->entire.max.y<r.max.y){

+			s = r;

+			s.min.y = t->entire.max.y;

+			flrefresh(l, s, i);

+			r.max.y = t->entire.max.y;

+		}

+		/* remaining piece of r is blocked by t; forget about it */

+		someinvis = 1;

+	}

+}

--- /dev/null

+++ b/sys/src/cmd/jamterm/flayer.h

@@ -1,0 +1,54 @@

+typedef enum Vis{

+	None=0,

+	Some,

+	All,

+}Vis;

+

+enum{

+	Clicktime=500,		/* milliseconds */

+};

+

+typedef struct Flayer Flayer;

+

+struct Flayer

+{

+	Frame		f;

+	long		origin;	/* offset of first char in flayer */

+	long		p0, p1;

+	long		click;	/* time at which selection click occurred, in HZ */

+	Point		warpto;

+	Rune		*(*textfn)(Flayer*, long, ulong*);

+	int		user0;

+	void		*user1;

+	Rectangle	entire;

+	Rectangle	scroll;

+	Rectangle	lastsr;	/* geometry of scrollbar when last drawn */

+	Vis		visible;

+

+	Flayer *lprev;

+	Flayer *lnext;

+};

+

+void	flborder(Flayer*, int);

+void	flclose(Flayer*);

+void	fldelete(Flayer*, long, long);

+void	flfp0p1(Flayer*, ulong*, ulong*);

+void	flinit(Flayer*, Rectangle, Font*, Image**);

+void	flinsert(Flayer*, Rune*, Rune*, long);

+void	flnew(Flayer*, Rune *(*fn)(Flayer*, long, ulong*), int, void*);

+int	flprepare(Flayer*);

+Rectangle flrect(Flayer*, Rectangle);

+void	flrefresh(Flayer*, Rectangle, int);

+void	flresize(Rectangle);

+int	flselect(Flayer*, ulong*);

+void	flsetselect(Flayer*, long, long);

+void	flstart(Rectangle);

+void	flupfront(Flayer*);

+Flayer	*flwhich(Point);

+

+#define	FLMARGIN	2

+#define	FLSCROLLWID	18

+#define	FLGAP		0

+

+extern	Image	*maincols[NCOL];

+extern	Image	*cmdcols[NCOL];

--- /dev/null

+++ b/sys/src/cmd/jamterm/icons.c

@@ -1,0 +1,38 @@

+#include <u.h>

+#include <libc.h>

+#include <draw.h>

+#include <thread.h>

+#include <cursor.h>

+#include <mouse.h>

+#include <keyboard.h>

+#include <frame.h>

+#include "flayer.h"

+#include "samterm.h"

+

+Cursor deadmouse={

+	{-7, -7},

+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 

+	 0x00, 0x00, 0x00, 0x0C, 0x00, 0x8E, 0x1D, 0xC7,

+	 0xFF, 0xE3, 0xFF, 0xF3, 0xFF, 0xFF, 0x7F, 0xFE, 

+	 0x3F, 0xF8, 0x17, 0xF0, 0x03, 0xE0, 0x00, 0x00,},

+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 

+	 0x00, 0x00, 0x00, 0x08, 0x00, 0x04, 0x00, 0x82,

+	 0x04, 0x41, 0xFF, 0xE1, 0x5F, 0xF1, 0x3F, 0xFE, 

+	 0x17, 0xF0, 0x03, 0xE0, 0x00, 0x00, 0x00, 0x00,}

+};

+Cursor lockarrow={

+	{-7, -7},

+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

+	 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

+	 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

+	 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,},

+	{0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,

+	 0x00, 0x00, 0x00, 0x00, 0x0F, 0xC0, 0x0F, 0xC0,

+	 0x03, 0xC0, 0x07, 0xC0, 0x0E, 0xC0, 0x1C, 0xC0,

+	 0x38, 0x00, 0x70, 0x00, 0xE0, 0xDB, 0xC0, 0xDB,}

+};

+

+void

+iconinit(void)

+{

+}

--- /dev/null

+++ b/sys/src/cmd/jamterm/io.c

@@ -1,0 +1,286 @@

+#include <u.h>

+#include <libc.h>

+#include <draw.h>

+#include <thread.h>

+#include <mouse.h>

+#include <keyboard.h>

+#include <frame.h>

+#include "flayer.h"

+#include "samterm.h"

+

+int	cursorfd;

+int	plumbfd = -1;

+int	input;

+int	got;

+int	block;

+int	kbdc;

+int	resized;

+uchar	*hostp;

+uchar	*hoststop;

+uchar	*plumbbase;

+uchar	*plumbp;

+uchar	*plumbstop;

+Channel	*plumbc;

+Channel	*hostc;

+Mousectl	*mousectl;

+Mouse	*mousep;

+Keyboardctl *keyboardctl;

+void	panic(char*);

+

+void

+initio(void)

+{

+	threadsetname("main");

+	mousectl = initmouse(nil, display->image);

+	if(mousectl == nil){

+		fprint(2, "jamterm: mouse init failed: %r\n");

+		threadexitsall("mouse");

+	}

+	mousep = mousectl;

+	keyboardctl = initkeyboard(nil);

+	if(keyboardctl == nil){

+		fprint(2, "jamterm: keyboard init failed: %r\n");

+		threadexitsall("kbd");

+	}

+	hoststart();

+	plumbstart();

+}

+

+void

+getmouse(void)

+{

+	if(readmouse(mousectl) < 0)

+		panic("mouse");

+}

+

+void

+mouseunblock(void)

+{

+	got &= ~(1<<RMouse);

+}

+

+void

+kbdblock(void)

+{		/* ca suffit */

+	block = (1<<RKeyboard)|(1<<RPlumb);

+}

+

+int

+button(int but)

+{

+	getmouse();

+	return mousep->buttons&(1<<(but-1));

+}

+

+void

+externload(int i)

+{

+	plumbbase = malloc(plumbbuf[i].n);

+	if(plumbbase == 0)

+		return;

+	memmove(plumbbase, plumbbuf[i].data, plumbbuf[i].n);

+	plumbp = plumbbase;

+	plumbstop = plumbbase + plumbbuf[i].n;

+	got |= 1<<RPlumb;

+}

+

+int

+waitforio(void)

+{

+	Alt alts[NRes+1];

+	Rune r;

+	int i;

+	ulong type;

+

+again:

+

+	alts[RPlumb].c = plumbc;

+	alts[RPlumb].v = &i;

+	alts[RPlumb].op = CHANRCV;

+	if((block & (1<<RPlumb)) || plumbc == nil)

+		alts[RPlumb].op = CHANNOP;

+

+	alts[RHost].c = hostc;

+	alts[RHost].v = &i;

+	alts[RHost].op = CHANRCV;

+	if(block & (1<<RHost))

+		alts[RHost].op = CHANNOP;

+

+	alts[RKeyboard].c = keyboardctl->c;

+	alts[RKeyboard].v = &r;

+	alts[RKeyboard].op = CHANRCV;

+	if(block & (1<<RKeyboard))

+		alts[RKeyboard].op = CHANNOP;

+

+	alts[RMouse].c = mousectl->c;

+	alts[RMouse].v = &mousectl->Mouse;

+	alts[RMouse].op = CHANRCV;

+	if(block & (1<<RMouse))

+		alts[RMouse].op = CHANNOP;

+

+	alts[RResize].c = mousectl->resizec;

+	alts[RResize].v = nil;

+	alts[RResize].op = CHANRCV;

+	if(block & (1<<RResize))

+		alts[RResize].op = CHANNOP;

+

+	alts[NRes].op = CHANEND;

+

+	if(got & ~block)

+		return got & ~block;

+	if(display->bufp > display->buf)

+		flushimage(display, 1);

+	type = alt(alts);

+	switch(type){

+	case RHost:

+		hostp = hostbuf[i].data;

+		hoststop = hostbuf[i].data + hostbuf[i].n;

+		block = 0;

+		break;

+	case RPlumb:

+		externload(i);

+		break;

+	case RKeyboard:

+		kbdc = r;

+		break;

+	case RMouse:

+		break;

+	case RResize:

+		resized = 1;

+		/* do the resize in line if we've finished initializing and we're not in a blocking state */

+		if(hasunlocked && block==0 && RESIZED())

+			resize();

+		goto again;

+	}

+	got |= 1<<type;

+	return got; 

+}

+

+int

+rcvchar(void)

+{

+	int c;

+

+	if(!(got & (1<<RHost)))

+		return -1;

+	c = *hostp++;

+	if(hostp == hoststop)

+		got &= ~(1<<RHost);

+	return c;

+}

+

+char*

+rcvstring(void)

+{

+	*hoststop = 0;

+	got &= ~(1<<RHost);

+	return (char*)hostp;

+}

+

+int

+getch(void)

+{

+	int c;

+

+	while((c = rcvchar()) == -1){

+		block = ~(1<<RHost);

+		waitforio();

+		block = 0;

+	}

+	return c;

+}

+

+int

+externchar(void)

+{

+	Rune r;

+

+    loop:

+	if(got & ((1<<RPlumb) & ~block)){

+		plumbp += chartorune(&r, (char*)plumbp);

+		if(plumbp >= plumbstop){

+			got &= ~(1<<RPlumb);

+			free(plumbbase);

+		}

+		if(r == 0)

+			goto loop;

+		return r;

+	}

+	return -1;

+}

+

+int kpeekc = -1;

+int

+ecankbd(void)

+{

+	Rune r;

+

+	if(kpeekc >= 0)

+		return 1;

+	if(nbrecv(keyboardctl->c, &r) > 0){

+		kpeekc = r;

+		return 1;

+	}

+	return 0;

+}

+

+int

+ekbd(void)

+{

+	int c;

+	Rune r;

+

+	if(kpeekc >= 0){

+		c = kpeekc;

+		kpeekc = -1;

+		return c;

+	}

+	if(recv(keyboardctl->c, &r) < 0){

+		fprint(2, "jamterm: keybard recv error: %r\n");

+		panic("kbd");

+	}

+	return r;

+}

+

+int

+kbdchar(void)

+{

+	int c, i;

+

+	c = externchar();

+	if(c > 0)

+		return c;

+	if(got & (1<<RKeyboard)){

+		c = kbdc;

+		kbdc = -1;

+		got &= ~(1<<RKeyboard);

+		return c;

+	}

+	while(plumbc!=nil && nbrecv(plumbc, &i)>0){

+		externload(i);

+		c = externchar();

+		if(c > 0)

+			return c;

+	}

+	if(!ecankbd())

+		return -1;

+	return ekbd();

+}

+

+int

+qpeekc(void)

+{

+	return kbdc;

+}

+

+int

+RESIZED(void)

+{

+	if(resized){

+		if(getwindow(display, Refnone) < 0)

+			panic("can't reattach to window");

+		resized = 0;

+		return 1;

+	}

+	return 0;

+}

--- /dev/null

+++ b/sys/src/cmd/jamterm/main.acid

@@ -1,0 +1,1334 @@

+sizeof_1_ = 8;

+aggr _1_

+{

+	'U' 0 lo;

+	'U' 4 hi;

+};

+

+defn

+_1_(addr) {

+	complex _1_ addr;

+	print("	lo	", addr.lo, "\n");

+	print("	hi	", addr.hi, "\n");

+};

+

+sizeofFPdbleword = 8;

+aggr FPdbleword

+{

+	'F' 0 x;

+	{

+	'U' 0 lo;

+	'U' 4 hi;

+	};

+};

+

+defn

+FPdbleword(addr) {

+	complex FPdbleword addr;

+	print("	x	", addr.x, "\n");

+	print("_1_ {\n");

+		_1_(addr+0);

+	print("}\n");

+};

+

+UTFmax = 4;

+Runesync = 128;

+Runeself = 128;

+Runeerror = 65533;

+Runemax = 1114111;

+Runemask = 2097151;

+sizeofFmt = 80;

+aggr Fmt

+{

+	'b' 0 runes;

+	'Y' 8 start;

+	'Y' 16 to;

+	'Y' 24 stop;

+	'Y' 32 flush;

+	'Y' 40 farg;

+	'D' 48 nfmt;

+	'Y' 56 args;

+	'D' 64 r;

+	'D' 68 width;

+	'D' 72 prec;

+	'U' 76 flags;

+};

+

+defn

+Fmt(addr) {

+	complex Fmt addr;

+	print("	runes	", addr.runes, "\n");

+	print("	start	", addr.start\Y, "\n");

+	print("	to	", addr.to\Y, "\n");

+	print("	stop	", addr.stop\Y, "\n");

+	print("	flush	", addr.flush\Y, "\n");

+	print("	farg	", addr.farg\Y, "\n");

+	print("	nfmt	", addr.nfmt, "\n");

+	print("	args	", addr.args\Y, "\n");

+	print("	r	", addr.r, "\n");

+	print("	width	", addr.width, "\n");

+	print("	prec	", addr.prec, "\n");

+	print("	flags	", addr.flags, "\n");

+};

+

+FmtWidth = 1;

+FmtLeft = 2;

+FmtPrec = 4;

+FmtSharp = 8;

+FmtSpace = 16;

+FmtSign = 32;

+FmtZero = 64;

+FmtUnsigned = 128;

+FmtShort = 256;

+FmtLong = 512;

+FmtVLong = 1024;

+FmtComma = 2048;

+FmtByte = 4096;

+FmtFlag = 8192;

+sizeofTm = 64;

+aggr Tm

+{

+	'D' 0 nsec;

+	'D' 4 sec;

+	'D' 8 min;

+	'D' 12 hour;

+	'D' 16 mday;

+	'D' 20 mon;

+	'D' 24 year;

+	'D' 28 wday;

+	'D' 32 yday;

+	'a' 36 zone;

+	'D' 52 tzoff;

+	'Y' 56 tz;

+};

+

+defn

+Tm(addr) {

+	complex Tm addr;

+	print("	nsec	", addr.nsec, "\n");

+	print("	sec	", addr.sec, "\n");

+	print("	min	", addr.min, "\n");

+	print("	hour	", addr.hour, "\n");

+	print("	mday	", addr.mday, "\n");

+	print("	mon	", addr.mon, "\n");

+	print("	year	", addr.year, "\n");

+	print("	wday	", addr.wday, "\n");

+	print("	yday	", addr.yday, "\n");

+	print("	zone	", addr.zone, "\n");

+	print("	tzoff	", addr.tzoff, "\n");

+	print("	tz	", addr.tz\Y, "\n");

+};

+

+sizeofTmfmt = 16;

+aggr Tmfmt

+{

+	'Y' 0 fmt;

+	'A' Tm 8 tm;

+};

+

+defn

+Tmfmt(addr) {

+	complex Tmfmt addr;

+	print("	fmt	", addr.fmt\Y, "\n");

+	print("	tm	", addr.tm\Y, "\n");

+};

+

+PNPROC = 1;

+PNGROUP = 2;

+Profoff = 0;

+Profuser = 1;

+Profkernel = 2;

+Proftime = 3;

+Profsample = 4;

+sizeofLock = 8;

+aggr Lock

+{

+	'D' 0 val;

+};

+

+defn

+Lock(addr) {

+	complex Lock addr;

+	print("	val	", addr.val, "\n");

+};

+

+sizeofQLp = 16;

+aggr QLp

+{

+	'D' 0 inuse;

+	'D' 4 state;

+	'A' QLp 8 next;

+};

+

+defn

+QLp(addr) {

+	complex QLp addr;

+	print("	inuse	", addr.inuse, "\n");

+	print("	state	", addr.state, "\n");

+	print("	next	", addr.next\Y, "\n");

+};

+

+sizeofQLock = 32;

+aggr QLock

+{

+	Lock 0 lock;

+	'D' 8 locked;

+	'A' QLp 16 $head;

+	'A' QLp 24 $tail;

+};

+

+defn

+QLock(addr) {

+	complex QLock addr;

+	print("Lock lock {\n");

+	Lock(addr.lock);

+	print("}\n");

+	print("	locked	", addr.locked, "\n");

+	print("	$head	", addr.$head\Y, "\n");

+	print("	$tail	", addr.$tail\Y, "\n");

+};

+

+sizeofRWLock = 32;

+aggr RWLock

+{

+	Lock 0 lock;

+	'D' 8 readers;

+	'D' 12 writer;

+	'A' QLp 16 $head;

+	'A' QLp 24 $tail;

+};

+

+defn

+RWLock(addr) {

+	complex RWLock addr;

+	print("Lock lock {\n");

+	Lock(addr.lock);

+	print("}\n");

+	print("	readers	", addr.readers, "\n");

+	print("	writer	", addr.writer, "\n");

+	print("	$head	", addr.$head\Y, "\n");

+	print("	$tail	", addr.$tail\Y, "\n");

+};

+

+sizeofRendez = 24;

+aggr Rendez

+{

+	'A' QLock 0 l;

+	'A' QLp 8 $head;

+	'A' QLp 16 $tail;

+};

+

+defn

+Rendez(addr) {

+	complex Rendez addr;

+	print("	l	", addr.l\Y, "\n");

+	print("	$head	", addr.$head\Y, "\n");

+	print("	$tail	", addr.$tail\Y, "\n");

+};

+

+sizeofNetConnInfo = 72;

+aggr NetConnInfo

+{

+	'Y' 0 dir;

+	'Y' 8 root;

+	'Y' 16 spec;

+	'Y' 24 lsys;

+	'Y' 32 lserv;

+	'Y' 40 rsys;

+	'Y' 48 rserv;

+	'Y' 56 laddr;

+	'Y' 64 raddr;

+};

+

+defn

+NetConnInfo(addr) {

+	complex NetConnInfo addr;

+	print("	dir	", addr.dir\Y, "\n");

+	print("	root	", addr.root\Y, "\n");

+	print("	spec	", addr.spec\Y, "\n");

+	print("	lsys	", addr.lsys\Y, "\n");

+	print("	lserv	", addr.lserv\Y, "\n");

+	print("	rsys	", addr.rsys\Y, "\n");

+	print("	rserv	", addr.rserv\Y, "\n");

+	print("	laddr	", addr.laddr\Y, "\n");

+	print("	raddr	", addr.raddr\Y, "\n");

+};

+

+RFNAMEG = 1;

+RFENVG = 2;

+RFFDG = 4;

+RFNOTEG = 8;

+RFPROC = 16;

+RFMEM = 32;

+RFNOWAIT = 64;

+RFCNAMEG = 1024;

+RFCENVG = 2048;

+RFCFDG = 4096;

+RFREND = 8192;

+RFNOMNT = 16384;

+sizeofQid = 16;

+aggr Qid

+{

+	'W' 0 path;

+	'U' 8 vers;

+	'b' 12 type;

+};

+

+defn

+Qid(addr) {

+	complex Qid addr;

+	print("	path	", addr.path, "\n");

+	print("	vers	", addr.vers, "\n");

+	print("	type	", addr.type, "\n");

+};

+

+sizeofDir = 80;

+aggr Dir

+{

+	'u' 0 type;

+	'U' 4 dev;

+	Qid 8 qid;

+	'U' 24 mode;

+	'U' 28 atime;

+	'U' 32 mtime;

+	'V' 40 length;

+	'Y' 48 name;

+	'Y' 56 uid;

+	'Y' 64 gid;

+	'Y' 72 muid;

+};

+

+defn

+Dir(addr) {

+	complex Dir addr;

+	print("	type	", addr.type, "\n");

+	print("	dev	", addr.dev, "\n");

+	print("Qid qid {\n");

+	Qid(addr.qid);

+	print("}\n");

+	print("	mode	", addr.mode, "\n");

+	print("	atime	", addr.atime, "\n");

+	print("	mtime	", addr.mtime, "\n");

+	print("	length	", addr.length, "\n");

+	print("	name	", addr.name\Y, "\n");

+	print("	uid	", addr.uid\Y, "\n");

+	print("	gid	", addr.gid\Y, "\n");

+	print("	muid	", addr.muid\Y, "\n");

+};

+

+sizeofWaitmsg = 24;

+aggr Waitmsg

+{

+	'D' 0 pid;

+	'a' 4 time;

+	'Y' 16 msg;

+};

+

+defn

+Waitmsg(addr) {

+	complex Waitmsg addr;

+	print("	pid	", addr.pid, "\n");

+	print("	time	", addr.time, "\n");

+	print("	msg	", addr.msg\Y, "\n");

+};

+

+sizeofIOchunk = 16;

+aggr IOchunk

+{

+	'Y' 0 addr;

+	'U' 8 len;

+};

+

+defn

+IOchunk(addr) {

+	complex IOchunk addr;

+	print("	addr	", addr.addr\Y, "\n");

+	print("	len	", addr.len, "\n");

+};

+

+DOpaque = 4294967295;

+DTransparent = 0;

+DBlack = 255;

+DWhite = 4294967295;

+DRed = 4278190335;

+DGreen = 16711935;

+DBlue = 65535;

+DCyan = 16777215;

+DMagenta = 4278255615;

+DYellow = 4294902015;

+DPaleyellow = 4294945535;

+DDarkyellow = 4008615679;

+DDarkgreen = 1149781247;

+DPalegreen = 2868882175;

+DMedgreen = 2295105791;

+DDarkblue = 22015;

+DPalebluegreen = 2868903935;

+DPaleblue = 48127;

+DBluegreen = 8947967;

+DGreygreen = 1437248255;

+DPalegreygreen = 2666458879;

+DYellowgreen = 2576960767;

+DMedblue = 39423;

+DGreyblue = 6142975;

+DPalegreyblue = 1234427391;

+DPurpleblue = 2290666751;

+DNotacolor = 4294967040;

+DNofill = 4294967040;

+Displaybufsize = 8000;

+ICOSSCALE = 1024;

+Borderwidth = 4;

+Refbackup = 0;

+Refnone = 1;

+Refmesg = 2;

+Endsquare = 0;

+Enddisc = 1;

+Endarrow = 2;

+Endmask = 31;

+Clear = 0;

+SinD = 8;

+DinS = 4;

+SoutD = 2;

+DoutS = 1;

+S = 10;

+SoverD = 11;

+SatopD = 9;

+SxorD = 3;

+D = 5;

+DoverS = 7;

+DatopS = 6;

+DxorS = 3;

+Ncomp = 12;

+CRed = 0;

+CGreen = 1;

+CBlue = 2;

+CGrey = 3;

+CAlpha = 4;

+CMap = 5;

+CIgnore = 6;

+NChan = 7;

+GREY1 = 49;

+GREY2 = 50;

+GREY4 = 52;

+GREY8 = 56;

+CMAP8 = 88;

+RGB15 = 1627723045;

+RGB16 = 333349;

+RGB24 = 530472;

+RGBA32 = 135800904;

+ARGB32 = 1208490024;

+XRGB32 = 1745360936;

+BGR24 = 2627592;

+ABGR32 = 1210587144;

+XBGR32 = 1747458056;

+sizeofPoint = 8;

+aggr Point

+{

+	'D' 0 x;

+	'D' 4 y;

+};

+

+defn

+Point(addr) {

+	complex Point addr;

+	print("	x	", addr.x, "\n");

+	print("	y	", addr.y, "\n");

+};

+

+sizeofRectangle = 16;

+aggr Rectangle

+{

+	Point 0 min;

+	Point 8 max;

+};

+

+defn

+Rectangle(addr) {

+	complex Rectangle addr;

+	print("Point min {\n");

+	Point(addr.min);

+	print("}\n");

+	print("Point max {\n");

+	Point(addr.max);

+	print("}\n");

+};

+

+sizeofScreen = 32;

+aggr Screen

+{

+	'Y' 0 display;

+	'D' 8 id;

+	'Y' 16 image;

+	'Y' 24 fill;

+};

+

+defn

+Screen(addr) {

+	complex Screen addr;

+	print("	display	", addr.display\Y, "\n");

+	print("	id	", addr.id, "\n");

+	print("	image	", addr.image\Y, "\n");

+	print("	fill	", addr.fill\Y, "\n");

+};

+

+sizeofDisplay = 264;

+aggr Display

+{

+	QLock 0 qlock;

+	'D' 32 locking;

+	'D' 36 dirno;

+	'D' 40 fd;

+	'D' 44 reffd;

+	'D' 48 ctlfd;

+	'D' 52 imageid;

+	'D' 56 $local;

+	'Y' 64 error;

+	'Y' 72 devdir;

+	'Y' 80 windir;

+	'a' 88 oldlabel;

+	'U' 152 dataqid;

+	'Y' 160 white;

+	'Y' 168 black;

+	'Y' 176 opaque;

+	'Y' 184 transparent;

+	'Y' 192 image;

+	'Y' 200 buf;

+	'D' 208 bufsize;

+	'Y' 216 bufp;

+	'Y' 224 defaultfont;

+	'Y' 232 defaultsubfont;

+	'Y' 240 windows;

+	'Y' 248 screenimage;

+	'D' 256 _isnewdisplay;

+};

+

+defn

+Display(addr) {

+	complex Display addr;

+	print("QLock qlock {\n");

+	QLock(addr.qlock);

+	print("}\n");

+	print("	locking	", addr.locking, "\n");

+	print("	dirno	", addr.dirno, "\n");

+	print("	fd	", addr.fd, "\n");

+	print("	reffd	", addr.reffd, "\n");

+	print("	ctlfd	", addr.ctlfd, "\n");

+	print("	imageid	", addr.imageid, "\n");

+	print("	$local	", addr.$local, "\n");

+	print("	error	", addr.error\Y, "\n");

+	print("	devdir	", addr.devdir\Y, "\n");

+	print("	windir	", addr.windir\Y, "\n");

+	print("	oldlabel	", addr.oldlabel, "\n");

+	print("	dataqid	", addr.dataqid, "\n");

+	print("	white	", addr.white\Y, "\n");

+	print("	black	", addr.black\Y, "\n");

+	print("	opaque	", addr.opaque\Y, "\n");

+	print("	transparent	", addr.transparent\Y, "\n");

+	print("	image	", addr.image\Y, "\n");

+	print("	buf	", addr.buf\Y, "\n");

+	print("	bufsize	", addr.bufsize, "\n");

+	print("	bufp	", addr.bufp\Y, "\n");

+	print("	defaultfont	", addr.defaultfont\Y, "\n");

+	print("	defaultsubfont	", addr.defaultsubfont\Y, "\n");

+	print("	windows	", addr.windows\Y, "\n");

+	print("	screenimage	", addr.screenimage\Y, "\n");

+	print("	_isnewdisplay	", addr._isnewdisplay, "\n");

+};

+

+sizeofImage = 80;

+aggr Image

+{

+	'A' Display 0 display;

+	'D' 8 id;

+	Rectangle 16 r;

+	Rectangle 32 clipr;

+	'D' 48 depth;

+	'U' 52 chan;

+	'D' 56 repl;

+	'A' Screen 64 screen;

+	'A' Image 72 next;

+};

+

+defn

+Image(addr) {

+	complex Image addr;

+	print("	display	", addr.display\Y, "\n");

+	print("	id	", addr.id, "\n");

+	print("Rectangle r {\n");

+	Rectangle(addr.r);

+	print("}\n");

+	print("Rectangle clipr {\n");

+	Rectangle(addr.clipr);

+	print("}\n");

+	print("	depth	", addr.depth, "\n");

+	print("	chan	", addr.chan, "\n");

+	print("	repl	", addr.repl, "\n");

+	print("	screen	", addr.screen\Y, "\n");

+	print("	next	", addr.next\Y, "\n");

+};

+

+sizeofRGB = 16;

+aggr RGB

+{

+	'U' 0 red;

+	'U' 4 green;

+	'U' 8 blue;

+};

+

+defn

+RGB(addr) {

+	complex RGB addr;

+	print("	red	", addr.red, "\n");

+	print("	green	", addr.green, "\n");

+	print("	blue	", addr.blue, "\n");

+};

+

+sizeofFontchar = 8;

+aggr Fontchar

+{

+	'D' 0 x;

+	'b' 4 top;

+	'b' 5 bottom;

+	'C' 6 left;

+	'b' 7 width;

+};

+

+defn

+Fontchar(addr) {

+	complex Fontchar addr;

+	print("	x	", addr.x, "\n");

+	print("	top	", addr.top, "\n");

+	print("	bottom	", addr.bottom, "\n");

+	print("	left	", addr.left, "\n");

+	print("	width	", addr.width, "\n");

+};

+

+sizeofSubfont = 40;

+aggr Subfont

+{

+	'Y' 0 name;

+	'd' 8 n;

+	'b' 10 height;

+	'C' 11 ascent;

+	'A' Fontchar 16 info;

+	'A' Image 24 bits;

+	'D' 32 ref;

+};

+

+defn

+Subfont(addr) {

+	complex Subfont addr;

+	print("	name	", addr.name\Y, "\n");

+	print("	n	", addr.n, "\n");

+	print("	height	", addr.height, "\n");

+	print("	ascent	", addr.ascent, "\n");

+	print("	info	", addr.info\Y, "\n");

+	print("	bits	", addr.bits\Y, "\n");

+	print("	ref	", addr.ref, "\n");

+};

+

+LOG2NFCACHE = 6;

+NFCACHE = 64;

+NFLOOK = 5;

+NFSUBF = 2;

+MAXFCACHE = 1029;

+MAXSUBF = 50;

+DSUBF = 4;

+SUBFAGE = 10000;

+CACHEAGE = 10000;

+sizeofCachefont = 32;

+aggr Cachefont

+{

+	'U' 0 min;

+	'U' 4 max;

+	'D' 8 offset;

+	'Y' 16 name;

+	'Y' 24 subfontname;

+};

+

+defn

+Cachefont(addr) {

+	complex Cachefont addr;

+	print("	min	", addr.min, "\n");

+	print("	max	", addr.max, "\n");

+	print("	offset	", addr.offset, "\n");

+	print("	name	", addr.name\Y, "\n");

+	print("	subfontname	", addr.subfontname\Y, "\n");

+};

+

+sizeofCacheinfo = 16;

+aggr Cacheinfo

+{

+	'u' 0 x;

+	'b' 2 width;

+	'C' 3 left;

+	'U' 4 value;

+	'u' 8 age;

+};

+

+defn

+Cacheinfo(addr) {

+	complex Cacheinfo addr;

+	print("	x	", addr.x, "\n");

+	print("	width	", addr.width, "\n");

+	print("	left	", addr.left, "\n");

+	print("	value	", addr.value, "\n");

+	print("	age	", addr.age, "\n");

+};

+

+sizeofCachesubf = 24;

+aggr Cachesubf

+{

+	'U' 0 age;

+	'A' Cachefont 8 cf;

+	'A' Subfont 16 f;

+};

+

+defn

+Cachesubf(addr) {

+	complex Cachesubf addr;

+	print("	age	", addr.age, "\n");

+	print("	cf	", addr.cf\Y, "\n");

+	print("	f	", addr.f\Y, "\n");

+};

+

+sizeofFont = 72;

+aggr Font

+{

+	'Y' 0 name;

+	'A' Display 8 display;

+	'd' 16 height;

+	'd' 18 ascent;

+	'd' 20 width;

+	'd' 22 nsub;

+	'U' 24 age;

+	'D' 28 maxdepth;

+	'D' 32 ncache;

+	'D' 36 nsubf;

+	'A' Cacheinfo 40 cache;

+	'A' Cachesubf 48 subf;

+	'A' Cachefont 56 sub;

+	'A' Image 64 cacheimage;

+};

+

+defn

+Font(addr) {

+	complex Font addr;

+	print("	name	", addr.name\Y, "\n");

+	print("	display	", addr.display\Y, "\n");

+	print("	height	", addr.height, "\n");

+	print("	ascent	", addr.ascent, "\n");

+	print("	width	", addr.width, "\n");

+	print("	nsub	", addr.nsub, "\n");

+	print("	age	", addr.age, "\n");

+	print("	maxdepth	", addr.maxdepth, "\n");

+	print("	ncache	", addr.ncache, "\n");

+	print("	nsubf	", addr.nsubf, "\n");

+	print("	cache	", addr.cache\Y, "\n");

+	print("	subf	", addr.subf\Y, "\n");

+	print("	sub	", addr.sub\Y, "\n");

+	print("	cacheimage	", addr.cacheimage\Y, "\n");

+};

+

+complex Point ZP;

+complex Rectangle ZR;

+complex Display display;

+complex Font font;

+complex Image screen;

+complex Screen _screen;

+Nqwds = 2;

+Nqshift = 5;

+Nqmask = -1;

+Nqbits = 64;

+sizeofChannel = 48;

+aggr Channel

+{

+	'D' 0 s;

+	'U' 4 f;

+	'U' 8 n;

+	'D' 12 e;

+	'D' 16 freed;

+	'Y' 24 qentry;

+	'D' 32 nentry;

+	'D' 36 closed;

+	'a' 40 v;

+};

+

+defn

+Channel(addr) {

+	complex Channel addr;

+	print("	s	", addr.s, "\n");

+	print("	f	", addr.f, "\n");

+	print("	n	", addr.n, "\n");

+	print("	e	", addr.e, "\n");

+	print("	freed	", addr.freed, "\n");

+	print("	qentry	", addr.qentry\Y, "\n");

+	print("	nentry	", addr.nentry, "\n");

+	print("	closed	", addr.closed, "\n");

+	print("	v	", addr.v, "\n");

+};

+

+CHANEND = 0;

+CHANSND = 1;

+CHANRCV = 2;

+CHANNOP = 3;

+CHANNOBLK = 4;

+sizeofAlt = 48;

+aggr Alt

+{

+	'A' Channel 0 c;

+	'Y' 8 v;

+	'D' 16 op;

+	'Y' 24 err;

+	'A' Channel 32 tag;

+	'D' 40 entryno;

+};

+

+defn

+Alt(addr) {

+	complex Alt addr;

+	print("	c	", addr.c\Y, "\n");

+	print("	v	", addr.v\Y, "\n");

+	print("	op	", addr.op, "\n");

+	print("	err	", addr.err\Y, "\n");

+	print("	tag	", addr.tag\Y, "\n");

+	print("	entryno	", addr.entryno, "\n");

+};

+

+sizeofRef = 8;

+aggr Ref

+{

+	'D' 0 ref;

+};

+

+defn

+Ref(addr) {

+	complex Ref addr;

+	print("	ref	", addr.ref, "\n");

+};

+

+sizeofCursor = 72;

+aggr Cursor

+{

+	Point 0 offset;

+	'a' 8 clr;

+	'a' 40 set;

+};

+

+defn

+Cursor(addr) {

+	complex Cursor addr;

+	print("Point offset {\n");

+	Point(addr.offset);

+	print("}\n");

+	print("	clr	", addr.clr, "\n");

+	print("	set	", addr.set, "\n");

+};

+

+sizeofMouse = 24;

+aggr Mouse

+{

+	'D' 0 buttons;

+	Point 8 xy;

+	'U' 16 msec;

+};

+

+defn

+Mouse(addr) {

+	complex Mouse addr;

+	print("	buttons	", addr.buttons, "\n");

+	print("Point xy {\n");

+	Point(addr.xy);

+	print("}\n");

+	print("	msec	", addr.msec, "\n");

+};

+

+sizeofMousectl = 72;

+aggr Mousectl

+{

+	{

+	'D' 0 buttons;

+	Point 8 xy;

+	'U' 16 msec;

+	};

+	'A' Channel 24 c;

+	'A' Channel 32 resizec;

+	'Y' 40 file;

+	'D' 48 mfd;

+	'D' 52 cfd;

+	'D' 56 pid;

+	'A' Image 64 image;

+};

+

+defn

+Mousectl(addr) {

+	complex Mousectl addr;

+	print("Mouse {\n");

+		Mouse(addr+0);

+	print("}\n");

+	print("	c	", addr.c\Y, "\n");

+	print("	resizec	", addr.resizec\Y, "\n");

+	print("	file	", addr.file\Y, "\n");

+	print("	mfd	", addr.mfd, "\n");

+	print("	cfd	", addr.cfd, "\n");

+	print("	pid	", addr.pid, "\n");

+	print("	image	", addr.image\Y, "\n");

+};

+

+sizeofMenu = 24;

+aggr Menu

+{

+	'Y' 0 item;

+	'Y' 8 gen;

+	'D' 16 lasthit;

+};

+

+defn

+Menu(addr) {

+	complex Menu addr;

+	print("	item	", addr.item\Y, "\n");

+	print("	gen	", addr.gen\Y, "\n");

+	print("	lasthit	", addr.lasthit, "\n");

+};

+

+sizeofKeyboardctl = 32;

+aggr Keyboardctl

+{

+	'A' Channel 0 c;

+	'Y' 8 file;

+	'D' 16 consfd;

+	'D' 20 ctlfd;

+	'D' 24 pid;

+};

+

+defn

+Keyboardctl(addr) {

+	complex Keyboardctl addr;

+	print("	c	", addr.c\Y, "\n");

+	print("	file	", addr.file\Y, "\n");

+	print("	consfd	", addr.consfd, "\n");

+	print("	ctlfd	", addr.ctlfd, "\n");

+	print("	pid	", addr.pid, "\n");

+};

+

+KF = 61440;

+Spec = 63488;

+PF = 63520;

+Kview = 63488;

+Khome = 61453;

+Kup = 61454;

+Kdown = 63488;

+Kpgup = 61455;

+Kprint = 61456;

+Kleft = 61457;

+Kright = 61458;

+Kpgdown = 61459;

+Kins = 61460;

+Kalt = 61461;

+Kshift = 61462;

+Kctl = 61463;

+Kend = 61464;

+Kscroll = 61465;

+Kscrolloneup = 61472;

+Kscrollonedown = 61473;

+Ksoh = 1;

+Kstx = 2;

+Ketx = 3;

+Keof = 4;

+Kenq = 5;

+Kack = 6;

+Kbs = 8;

+Knack = 21;

+Ketb = 23;

+Kdel = 127;

+Kesc = 27;

+Kbreak = 63585;

+Kcaps = 63588;

+Knum = 63589;

+Kmiddle = 63590;

+Kaltgr = 63591;

+Kmod4 = 63592;

+Kmouse = 63744;

+BACK = 0;

+HIGH = 1;

+BORD = 2;

+TEXT = 3;

+HTEXT = 4;

+NCOL = 5;

+sizeof_2_ = 8;

+aggr _2_

+{

+	'd' 0 bc;

+	'd' 2 minwid;

+};

+

+defn

+_2_(addr) {

+	complex _2_ addr;

+	print("	bc	", addr.bc, "\n");

+	print("	minwid	", addr.minwid, "\n");

+};

+

+sizeof_3_ = 8;

+aggr _3_

+{

+	'Y' 0 ptr;

+	{

+	'd' 0 bc;

+	'd' 2 minwid;

+	};

+};

+

+defn

+_3_(addr) {

+	complex _3_ addr;

+	print("	ptr	", addr.ptr\Y, "\n");

+	print("_2_ {\n");

+		_2_(addr+0);

+	print("}\n");

+};

+

+sizeofFrbox = 16;

+aggr Frbox

+{

+	'D' 0 wid;

+	'D' 4 nrune;

+	{

+	'Y' 8 ptr;

+	{

+	'd' 8 bc;

+	'd' 10 minwid;

+	};

+	};

+};

+

+defn

+Frbox(addr) {

+	complex Frbox addr;

+	print("	wid	", addr.wid, "\n");

+	print("	nrune	", addr.nrune, "\n");

+	print("_3_ {\n");

+		_3_(addr+8);

+	print("}\n");

+};

+

+complex Font font;

+complex Display display;

+sizeofFrame = 160;

+aggr Frame

+{

+	'A' Font 0 font;

+	'A' Display 8 display;

+	'A' Image 16 b;

+	'a' 24 cols;

+	Rectangle 64 r;

+	Rectangle 80 entire;

+	'Y' 96 scroll;

+	'A' Frbox 104 box;

+	'U' 112 p0;

+	'U' 116 p1;

+	'u' 120 nbox;

+	'u' 122 nalloc;

+	'u' 124 maxtab;

+	'u' 126 nchars;

+	'u' 128 nlines;

+	'u' 130 maxlines;

+	'u' 132 lastlinefull;

+	'u' 134 modified;

+	'A' Image 136 tick;

+	'A' Image 144 tickback;

+	'D' 152 ticked;

+};

+

+defn

+Frame(addr) {

+	complex Frame addr;

+	print("	font	", addr.font\Y, "\n");

+	print("	display	", addr.display\Y, "\n");

+	print("	b	", addr.b\Y, "\n");

+	print("	cols	", addr.cols, "\n");

+	print("Rectangle r {\n");

+	Rectangle(addr.r);

+	print("}\n");

+	print("Rectangle entire {\n");

+	Rectangle(addr.entire);

+	print("}\n");

+	print("	scroll	", addr.scroll\Y, "\n");

+	print("	box	", addr.box\Y, "\n");

+	print("	p0	", addr.p0, "\n");

+	print("	p1	", addr.p1, "\n");

+	print("	nbox	", addr.nbox, "\n");

+	print("	nalloc	", addr.nalloc, "\n");

+	print("	maxtab	", addr.maxtab, "\n");

+	print("	nchars	", addr.nchars, "\n");

+	print("	nlines	", addr.nlines, "\n");

+	print("	maxlines	", addr.maxlines, "\n");

+	print("	lastlinefull	", addr.lastlinefull, "\n");

+	print("	modified	", addr.modified, "\n");

+	print("	tick	", addr.tick\Y, "\n");

+	print("	tickback	", addr.tickback\Y, "\n");

+	print("	ticked	", addr.ticked, "\n");

+};

+

+None = 0;

+Some = 1;

+All = 2;

+Clicktime = 500;

+sizeofFlayer = 280;

+aggr Flayer

+{

+	Frame 0 f;

+	'D' 160 origin;

+	'D' 164 p0;

+	'D' 168 p1;

+	'D' 172 click;

+	Point 176 warpto;

+	'Y' 184 textfn;

+	'D' 192 user0;

+	'Y' 200 user1;

+	Rectangle 208 entire;

+	Rectangle 224 scroll;

+	Rectangle 240 lastsr;

+	'D' 256 visible;

+	'A' Flayer 264 lprev;

+	'A' Flayer 272 lnext;

+};

+

+defn

+Flayer(addr) {

+	complex Flayer addr;

+	print("Frame f {\n");

+	Frame(addr.f);

+	print("}\n");

+	print("	origin	", addr.origin, "\n");

+	print("	p0	", addr.p0, "\n");

+	print("	p1	", addr.p1, "\n");

+	print("	click	", addr.click, "\n");

+	print("Point warpto {\n");

+	Point(addr.warpto);

+	print("}\n");

+	print("	textfn	", addr.textfn\Y, "\n");

+	print("	user0	", addr.user0, "\n");

+	print("	user1	", addr.user1\Y, "\n");

+	print("Rectangle entire {\n");

+	Rectangle(addr.entire);

+	print("}\n");

+	print("Rectangle scroll {\n");

+	Rectangle(addr.scroll);

+	print("}\n");

+	print("Rectangle lastsr {\n");

+	Rectangle(addr.lastsr);

+	print("}\n");

+	print("	visible	", addr.visible, "\n");

+	print("	lprev	", addr.lprev\Y, "\n");

+	print("	lnext	", addr.lnext\Y, "\n");

+};

+

+Up = 0;

+Down = 1;

+Kbel = 7;

+Ksyn = 22;

+sizeofSection = 24;

+aggr Section

+{

+	'D' 0 nrunes;

+	'Y' 8 text;

+	'A' Section 16 next;

+};

+

+defn

+Section(addr) {

+	complex Section addr;

+	print("	nrunes	", addr.nrunes, "\n");

+	print("	text	", addr.text\Y, "\n");

+	print("	next	", addr.next\Y, "\n");

+};

+

+sizeofRasp = 16;

+aggr Rasp

+{

+	'D' 0 nrunes;

+	'A' Section 8 sect;

+};

+

+defn

+Rasp(addr) {

+	complex Rasp addr;

+	print("	nrunes	", addr.nrunes, "\n");

+	print("	sect	", addr.sect\Y, "\n");

+};

+

+sizeofText = 2824;

+aggr Text

+{

+	Rasp 0 rasp;

+	'd' 16 nwin;

+	'd' 18 front;

+	'u' 20 tag;

+	'C' 22 lock;

+	'a' 24 l;

+};

+

+defn

+Text(addr) {

+	complex Text addr;

+	print("Rasp rasp {\n");

+	Rasp(addr.rasp);

+	print("}\n");

+	print("	nwin	", addr.nwin, "\n");

+	print("	front	", addr.front, "\n");

+	print("	tag	", addr.tag, "\n");

+	print("	lock	", addr.lock, "\n");

+	print("	l	", addr.l, "\n");

+};

+

+sizeofReadbuf = 8200;

+aggr Readbuf

+{

+	'd' 0 n;

+	'a' 2 data;

+};

+

+defn

+Readbuf(addr) {

+	complex Readbuf addr;

+	print("	n	", addr.n, "\n");

+	print("	data	", addr.data, "\n");

+};

+

+RHost = 0;

+RKeyboard = 1;

+RMouse = 2;

+RPlumb = 3;

+RResize = 4;

+NRes = 5;

+complex Text text;

+complex Cursor deadmouse;

+complex Cursor lockarrow;

+complex Cursor cursor;

+complex Flayer which;

+complex Flayer work;

+complex Text cmd;

+complex Mousectl mousectl;

+complex Keyboardctl keyboardctl;

+complex Mouse mousep;

+complex Channel plumbc;

+complex Channel hostc;

+Tversion = 0;

+Tstartcmdfile = 1;

+Tcheck = 2;

+Trequest = 3;

+Torigin = 4;

+Tstartfile = 5;

+Tworkfile = 6;

+Ttype = 7;

+Tcut = 8;

+Tpaste = 9;

+Tsnarf = 10;

+Tstartnewfile = 11;

+Twrite = 12;

+Tclose = 13;

+Tlook = 14;

+Tsearch = 15;

+Tsend = 16;

+Tdclick = 17;

+Tstartsnarf = 18;

+Tsetsnarf = 19;

+Tack = 20;

+Texit = 21;

+Tplumb = 22;

+Ttclick = 23;

+Tmenucmd = 24;

+Tmenucmdsend = 25;

+TMAX = 26;

+Hversion = 0;

+Hbindname = 1;

+Hcurrent = 2;

+Hnewname = 3;

+Hmovname = 4;

+Hgrow = 5;

+Hcheck0 = 6;

+Hcheck = 7;

+Hunlock = 8;

+Hdata = 9;

+Horigin = 10;

+Hunlockfile = 11;

+Hsetdot = 12;

+Hgrowdata = 13;

+Hmoveto = 14;

+Hclean = 15;

+Hdirty = 16;

+Hcut = 17;

+Hsetpat = 18;

+Hdelname = 19;

+Hclose = 20;

+Hsetsnarf = 21;

+Hsnarflen = 22;

+Hack = 23;

+Hexit = 24;

+Hplumb = 25;

+Hmenucmd = 26;

+HMAX = 27;

+sizeofHeader = 8;

+aggr Header

+{

+	'b' 0 type;

+	'b' 1 count0;

+	'b' 2 count1;

+	'a' 3 data;

+};

+

+defn

+Header(addr) {

+	complex Header addr;

+	print("	type	", addr.type, "\n");

+	print("	count0	", addr.count0, "\n");

+	print("	count1	", addr.count1, "\n");

+	print("	data	", addr.data, "\n");

+};

+

+complex Text cmd;

+complex Cursor cursor;

+complex Flayer which;

+complex Flayer work;

+complex Flayer flru;

+complex Text threadmain:t;

+complex Rectangle threadmain:r;

+complex Flayer threadmain:nwhich;

+complex Flayer flunlink:fl;

+complex Flayer fllinkhead:fl;

+complex Flayer warpmouse:l;

+complex Point warpmouse:p;

+complex Flayer current:nw;

+complex Text current:t;

+complex Flayer cycle:l;

+complex Flayer closeup:l;

+complex Text closeup:t;

+complex Text findl:t;

+complex Flayer duplicate:l;

+complex Rectangle duplicate:r;

+complex Font duplicate:f;

+complex Text duplicate:t;

+complex Flayer duplicate:nl;

+complex Text snarf:t;

+complex Flayer snarf:l;

+complex Text cut:t;

+complex Flayer cut:l;

+complex Text paste:t;

+complex Flayer scrorigin:l;

+complex Text scrorigin:t;

+complex Rasp raspc:r;

+complex Rasp getcol:r;

+complex Rasp del:r;

+complex Rasp ctlw:r;

+complex Rasp ctlu:r;

+complex Flayer center:l;

+complex Text center:t;

+complex Flayer onethird:l;

+complex Text onethird:t;

+complex Rectangle onethird:s;

+complex Text flushtyping:t;

+complex Flayer type:l;

+complex Text type:t;

+complex Flayer gettext:l;

+complex Text gettext:t;

+complex Flayer scrtotal:l;

--- /dev/null

+++ b/sys/src/cmd/jamterm/main.c

@@ -1,0 +1,805 @@

+#include <u.h>

+#include <libc.h>

+#include <draw.h>

+#include <thread.h>

+#include <cursor.h>

+#include <mouse.h>

+#include <keyboard.h>

+#include <frame.h>

+#include "flayer.h"

+#include "samterm.h"

+

+int	mainstacksize = 16*1024;

+

+Text	cmd;

+Rune	*scratch;

+long	nscralloc;

+Cursor	*cursor;

+Flayer	*which = 0;

+Flayer	*work = 0;

+Flayer	flru;

+long	snarflen;

+long	typestart = -1;

+long	typeend = -1;

+long	typeesc = -1;

+long	modified = 0;		/* strange lookahead for menus */

+char	hostlock = 1;

+char	hasunlocked = 0;

+int	maxtab = 8;

+int	autoindent = 1;

+int	spacesindent;

+

+void

+threadmain(int argc, char *argv[])

+{

+	int i, got, nclick, chord;

+	Text *t;

+	Rectangle r;

+	Flayer *nwhich;

+	ulong p;

+

+	getscreen(argc, argv);

+	iconinit();

+	initio();

+	flru.lprev = &flru;

+	flru.lnext = &flru;

+	scratch = alloc(100*RUNESIZE);

+	nscralloc = 100;

+	r = defaultcmdrect();

+	rinit(&cmd.rasp);

+	flnew(&cmd.l[0], gettext, 1, &cmd);

+	flinit(&cmd.l[0], r, font, cmdcols);

+	cmd.nwin = 1;

+	which = &cmd.l[0];

+	cmd.tag = Untagged;

+	outTs(Tversion, VERSION);

+	startnewfile(Tstartcmdfile, &cmd);

+	fmtinstall('P', Pfmt);

+

+	got = 0;

+	chord = 0;

+	for(;;got = waitforio()){

+		if(hasunlocked && RESIZED())

+			resize();

+		if(got&(1<<RHost))

+			rcv();

+		if(got&(1<<RPlumb)){

+			for(i=0; cmd.l[i].textfn==0; i++)

+				;

+			nwhich = which;

+			current(&cmd.l[i], 0, 0);

+			flsetselect(which, cmd.rasp.nrunes, cmd.rasp.nrunes);

+			type(which, RPlumb);

+			current(nwhich, 0, 0);

+		}

+		if(got&(1<<RKeyboard))

+			if(which)

+				type(which, RKeyboard);

+			else

+				kbdblock();

+		if(got&(1<<RMouse)){

+			if(hostlock==2 || !ptinrect(mousep->xy, screen->r)){

+				mouseunblock();

+				continue;

+			}

+			nwhich = flwhich(mousep->xy);

+			if(mousep->buttons)

+				flushtyping(1);

+			if((mousep->buttons&1)==0)

+				chord = 0;

+			if(chord && which && which==nwhich){

+				chord |= mousep->buttons;

+				t = (Text *)which->user1;

+				if(!t->lock){

+					int w = which-t->l;

+					if(chord&2){

+						cut(t, w, 1, 1);

+						chord &= ~2;

+					}

+					if(chord&4){

+						paste(t, w);

+						chord &= ~4;

+					}

+				}

+			}else if(mousep->buttons&(1|8)){

+				if(nwhich && nwhich!=which)

+					current(nwhich, 1, 1);

+				if(ptinrect(mousep->xy, which->scroll) || mousep->buttons & 8)

+					scroll(which, (mousep->buttons&8) ? 4 : 1);

+				else{

+					t=(Text *)which->user1;

+					nclick = flselect(which, &p);

+					if(nclick > 0){

+						if(nclick > 1)

+							outTsl(Ttclick, t->tag, p);

+						else

+							outTsl(Tdclick, t->tag, p);

+						t->lock++;

+					}else if(t!=&cmd)

+						outcmd();

+					if(mousep->buttons&1)

+						chord = mousep->buttons;

+				}

+			}else if((mousep->buttons&2) && which){

+				if(nwhich && nwhich!=which)

+					current(nwhich, 1, 1);

+				if(ptinrect(mousep->xy, which->scroll))

+					scroll(which, 2);

+				else

+					menu2hit();

+			}else if(mousep->buttons&(4|16)){

+				if(nwhich && nwhich!=which)

+					current(nwhich, 1, 1);

+				if(ptinrect(mousep->xy, which->scroll) || mousep->buttons & 16)

+					scroll(which, (mousep->buttons&16) ? 5 : 3);

+				else

+					menu3hit();

+			}

+			mouseunblock();

+		}

+	}

+}

+

+

+void

+resize(void)

+{

+	int i;

+

+	flresize(screen->clipr);

+	for(i = 0; i<nname; i++)

+		if(text[i])

+			hcheck(text[i]->tag);

+}

+

+static void

+flunlink(Flayer *fl)

+{

+	if(fl->lnext == nil || fl->lnext == fl)

+		return;

+	fl->lnext->lprev = fl->lprev;

+	fl->lprev->lnext = fl->lnext;

+	fl->lnext = nil;

+	fl->lprev = nil;

+}

+

+static void

+fllinkhead(Flayer *fl)

+{

+	flunlink(fl);

+	fl->lnext = flru.lnext;

+	fl->lprev = &flru;

+	fl->lnext->lprev = fl;

+	fl->lprev->lnext = fl;

+}

+

+void

+warpmouse(Flayer *l)

+{

+	Point p;

+

+	if(l == nil || ptinrect(mousectl->xy, l->entire))

+		return;

+	p = addpt(screen->r.min, l->warpto);

+	if(eqpt(p, ZP) || !ptinrect(p, l->entire)){

+		p = addpt(l->entire.min, divpt(subpt(l->entire.max, l->entire.min), 2));

+		l->warpto = subpt(p, screen->r.min);

+	}

+	moveto(mousectl, p);

+}

+

+void

+current(Flayer *nw, int warp, int up)

+{

+	Text *t;

+

+	if(which){

+		flborder(which, 0);

+		if(warp && ptinrect(mousectl->xy, insetrect(which->entire, 4)))

+			which->warpto = subpt(mousectl->xy, screen->r.min);

+		flushtyping(1);

+	}

+	if(nw){

+		flupfront(nw);

+		flborder(nw, 1);

+		//buttons(Up);

+		t = (Text *)nw->user1;

+		t->front = nw-&t->l[0];

+		//i = whichmenu(t->tag);

+		//ign = i >= 0 && strstr((char *)name[i], "jam.err") != nil;

+		if(t != &cmd){

+		//	work = ign ? nil : nw;

+		//	if(up && !ign)

+			work = nw;

+			if(up)

+				fllinkhead(nw);

+		}

+		if(warp)

+			warpmouse(nw);

+	}

+	which = nw;

+}

+

+Flayer *

+cycle(int fw)

+{

+	int i;

+	Flayer *l;

+

+	if(flru.lnext == &flru){

+		for(i=0; cmd.l[i].textfn==0; i++)

+			;

+		return &cmd.l[i];

+	}

+	if(fw)

+		l = work != nil && work->lnext != nil ? work->lnext : flru.lnext;

+	else

+		l = work != nil && work->lprev != nil ? work->lprev : flru.lprev;

+	for(; l==&flru; l=fw ? l->lnext : l->lprev)

+		;

+	return l;

+}

+

+void

+closeup(Flayer *l)

+{

+	Text *t=(Text *)l->user1;

+	int m;

+

+	m = whichmenu(t->tag);

+	if(m < 0)

+		return;

+	flunlink(l);

+	flclose(l);

+	if(l == work)

+		work = 0;

+	if(--t->nwin == 0){

+		rclear(&t->rasp);

+		free((uchar *)t);

+		text[m] = 0;

+		if(l == which){

+			which = nil;

+			current(cycle(1), 1, 0);

+		}

+	}else if(l == &t->l[t->front]){

+		for(m=0; m<NL; m++)	/* find one; any one will do */

+			if(t->l[m].textfn){

+				t->front = m;

+				if(l == which){

+					which = nil;

+					current(&t->l[m], 1, 0);

+				}

+				return;

+			}

+		panic("close");

+	}

+}

+

+Flayer *

+findl(Text *t)

+{

+	int i;

+	for(i = 0; i<NL; i++)

+		if(t->l[i].textfn==0)

+			return &t->l[i];

+	return 0;

+}

+

+void

+duplicate(Flayer *l, Rectangle r, Font *f, int close)

+{

+	Text *t=(Text *)l->user1;

+	Flayer *nl = findl(t);

+	Rune *rp;

+	ulong n;

+

+	if(nl){

+		flnew(nl, gettext, l->user0, (char *)t);

+		flinit(nl, r, f, l->f.cols);

+		nl->origin = l->origin;

+		rp = (*l->textfn)(l, l->f.nchars, &n);

+		flinsert(nl, rp, rp+n, l->origin);

+		flsetselect(nl, l->p0, l->p1);

+		if(close){

+			flclose(l);

+			flunlink(l);

+			if(l==which)

+				which = 0;

+		}else

+			t->nwin++;

+		current(nl, 1, 1);

+		hcheck(t->tag);

+	}

+	setcursor(mousectl, cursor);

+}

+

+void

+buttons(int updown)

+{

+	while(((mousep->buttons&7)!=0) != updown)

+		getmouse();

+}

+

+void

+snarf(Text *t, int w)

+{

+	Flayer *l = &t->l[w];

+

+	if(l->p1>l->p0){

+		snarflen = l->p1-l->p0;

+		outTsll(Tsnarf, t->tag, l->p0, l->p1);

+	}

+}

+

+void

+cut(Text *t, int w, int save, int check)

+{

+	long p0, p1;

+	Flayer *l;

+

+	l = &t->l[w];

+	p0 = l->p0;

+	p1 = l->p1;

+	if(p0 == p1)

+		return;

+	if(p0 < 0)

+		panic("cut");

+	if(save)

+		snarf(t, w);

+	outTsll(Tcut, t->tag, p0, p1);

+	flsetselect(l, p0, p0);

+	t->lock++;

+	hcut(t->tag, p0, p1-p0);

+	if(check)

+		hcheck(t->tag);

+}

+

+void

+paste(Text *t, int w)

+{

+	cut(t, w, 0, 0);

+	t->lock++;

+	outTsl(Tpaste, t->tag, t->l[w].p0);

+}

+

+void

+scrorigin(Flayer *l, int but, long p0)

+{

+	Text *t=(Text *)l->user1;

+

+	if(t->tag == Untagged)

+		return;

+

+	switch(but){

+	case 1:

+		outTsll(Torigin, t->tag, l->origin, p0);

+		break;

+	case 2:

+		outTsll(Torigin, t->tag, p0, 1L);

+		break;

+	case 3:

+		horigin(t->tag,p0);

+	}

+}

+

+int

+alnum(int c)

+{

+	/*

+	 * Hard to get absolutely right.  Use what we know about ASCII

+	 * and assume anything above the Latin control characters is

+	 * potentially an alphanumeric.

+	 */

+	if(c<=' ')

+		return 0;

+	if(0x7F<=c && c<=0xA0)

+		return 0;

+	if(utfrune("!\"#$%&'()*+,-./:;<=>?@[\\]^`{|}~", c))

+		return 0;

+	return 1;

+}

+

+int

+raspc(Rasp *r, long p)

+{

+	ulong n;

+	rload(r, p, p+1, &n);

+	if(n)

+		return scratch[0];

+	return 0;

+}

+

+int

+getcol(Rasp *r, long p)

+{

+	int col;

+

+	for(col = 0; p > 0 && raspc(r, p-1)!='\n'; p--, col++)

+		;

+	return col;

+}

+

+long

+del(Rasp *r, long o, long p)

+{

+	int i, col, n;

+

+	if(--p < o)

+		return o;

+	if(!spacesindent || raspc(r, p)!=' ')

+		return p;

+	col = getcol(r, p) + 1;

+	if((n = col % maxtab) == 0)

+		n = maxtab;

+	for(i = 0; p-1>=o && raspc(r, p-1)==' ' && i<n-1; --p, i++)

+		;

+	return p>=o? p : o;

+}

+

+long

+ctlw(Rasp *r, long o, long p)

+{

+	int c;

+

+	if(--p < o)

+		return o;

+	if(raspc(r, p)=='\n')

+		return p;

+	for(; p>=o && !alnum(c=raspc(r, p)); --p)

+		if(c=='\n')

+			return p+1;

+	for(; p>o && alnum(raspc(r, p-1)); --p)

+		;

+	return p>=o? p : o;

+}

+

+long

+ctlu(Rasp *r, long o, long p)

+{

+	if(--p < o)

+		return o;

+	if(raspc(r, p)=='\n')

+		return p;

+	for(; p-1>=o && raspc(r, p-1)!='\n'; --p)

+		;

+	return p>=o? p : o;

+}

+

+int

+center(Flayer *l, long a)

+{

+	Text *t;

+

+	t = l->user1;

+	if(!t->lock && (a<l->origin || l->origin+l->f.nchars<a)){

+		if(a > t->rasp.nrunes)

+			a = t->rasp.nrunes;

+		outTsll(Torigin, t->tag, a, 2L);

+		return 1;

+	}

+	return 0;

+}

+

+int

+onethird(Flayer *l, long a)

+{

+	Text *t;

+	Rectangle s;

+	long lines;

+

+	t = l->user1;

+	if(!t->lock && (a<l->origin || l->origin+l->f.nchars<a)){

+		if(a > t->rasp.nrunes)

+			a = t->rasp.nrunes;

+		s = insetrect(l->scroll, 1);

+		lines = ((s.max.y-s.min.y)/l->f.font->height+1)/3;

+		if (lines < 2)

+			lines = 2;

+		outTsll(Torigin, t->tag, a, lines);

+		return 1;

+	}

+	return 0;

+}

+

+void

+flushtyping(int clearesc)

+{

+	Text *t;

+	ulong n;

+

+	if(clearesc)

+		typeesc = -1;	

+	if(typestart == typeend) {

+		modified = 0;

+		return;

+	}

+	t = which->user1;

+	if(t != &cmd)

+		modified = 1;

+	rload(&t->rasp, typestart, typeend, &n);

+	scratch[n] = 0;

+	if(t==&cmd && typeend==t->rasp.nrunes && scratch[typeend-typestart-1]=='\n'){

+		setlock();

+		outcmd();

+	}

+	outTslS(Ttype, t->tag, typestart, scratch);

+	typestart = -1;

+	typeend = -1;

+}

+

+int

+nontypingkey(int c)

+{

+	switch(c){

+	case Kup:

+	case Kdown:

+	case Khome:

+	case Kend:

+	case Kpgdown:

+	case Kpgup:

+	case Kleft:

+	case Kright:

+	case Ksoh:

+	case Kenq:

+	case Kstx:

+	case Kbel:

+	case Ksyn:

+		return 1;

+	}

+	return 0;

+}

+

+

+void

+type(Flayer *l, int res)	/* what a bloody mess this is */

+{

+	Text *t = (Text *)l->user1;

+	Rune buf[100];

+	Rune *p = buf;

+	int c, backspacing;

+	long a, a0;

+	int scrollkey;

+

+	scrollkey = 0;

+	if(res == RKeyboard)

+		scrollkey = nontypingkey(qpeekc());	/* ICK */

+

+	if(hostlock || t->lock){

+		kbdblock();

+		return;

+	}

+	a = l->p0;

+	if(a!=l->p1 && !scrollkey){

+		flushtyping(1);

+		cut(t, t->front, 1, 1);

+		return;	/* it may now be locked */

+	}

+	backspacing = 0;

+	while((c = kbdchar())>0){

+		if(res == RKeyboard){

+			if(nontypingkey(c) || c==Kesc)

+				break;

+			/* backspace, ctrl-u, ctrl-w, del */

+			if(c==Kbs || c==Knack || c==Ketb || c==Kdel){

+				backspacing = 1;

+				break;

+			}

+		}

+		if(spacesindent && c == '\t'){

+			int i, col, n;

+			col = getcol(&t->rasp, a);

+			n = maxtab - col % maxtab;

+			for(i = 0; i < n && p < buf+nelem(buf); i++)

+				*p++ = ' ';

+		} else

+			*p++ = c;

+		if(c == '\n' && autoindent && t != &cmd){

+			/* autoindent */

+			int cursor, ch;

+			cursor = ctlu(&t->rasp, 0, a+(p-buf)-1);

+			while(p < buf+nelem(buf)){

+				ch = raspc(&t->rasp, cursor++);

+				if(ch == ' ' || ch == '\t')

+					*p++ = ch;

+				else

+					break;

+			}

+		}

+		if(c == '\n' || p >= buf+sizeof(buf)/sizeof(buf[0]))

+			break;

+	}

+	if(p > buf){

+		if(typestart < 0)

+			typestart = a;

+		if(typeesc < 0)

+			typeesc = a;

+		hgrow(t->tag, a, p-buf, 0);

+		t->lock++;	/* pretend we Trequest'ed for hdatarune*/

+		hdatarune(t->tag, a, buf, p-buf);

+		a += p-buf;

+		l->p0 = a;

+		l->p1 = a;

+		typeend = a;

+		if(c=='\n' || typeend-typestart>100)

+			flushtyping(0);

+		onethird(l, a);

+	}

+	if(c==Kdown){

+		flushtyping(0);

+		scrorigin(l, 3, l->origin+frcharofpt(&l->f, Pt(l->scroll.max.x, l->scroll.min.y + l->f.font->height)));

+	}else if(c==Kup){

+		flushtyping(0);

+		scrorigin(l, 1, 2);

+	}else if(c==Kpgdown){

+		flushtyping(0);

+		scrorigin(l, 3, l->origin+frcharofpt(&l->f, Pt(l->scroll.max.x, l->scroll.max.y - l->f.font->height)));

+		/* backspacing immediately after outcmd(): sorry */

+	}else if(c==Kpgup){

+		flushtyping(0);

+		scrorigin(l, 1, Dy(l->scroll)/l->f.font->height);

+	}else if(c == Kright){

+		flushtyping(0);

+		a0 = l->p0;

+		if(a0 < t->rasp.nrunes)

+			a0++;

+		flsetselect(l, a0, a0);

+		center(l, a0);

+	}else if(c == Kleft){

+		flushtyping(0);

+		a0 = l->p0;

+		if(a0 > 0)

+			a0--;

+		flsetselect(l, a0, a0);

+		center(l, a0);

+	}else if(c == Khome){

+		flushtyping(0);

+		center(l, 0);

+	}else if(c == Kend){

+		flushtyping(0);

+		center(l, t->rasp.nrunes);

+	}else if(c == Ksoh || c == Kenq){

+		flushtyping(1);

+		if(c == Ksoh)

+			while(a > 0 && raspc(&t->rasp, a-1)!='\n')

+				a--;

+		else

+			while(a < t->rasp.nrunes && raspc(&t->rasp, a)!='\n')

+				a++;

+		l->p0 = l->p1 = a;

+		for(l=t->l; l<&t->l[NL]; l++)

+			if(l->textfn)

+				flsetselect(l, l->p0, l->p1);

+	}else if(backspacing && !hostlock){

+		/* backspacing immediately after outcmd(): sorry */

+		if(l->f.p0>0 && a>0){

+			switch(c){

+			case Kbs:

+			case Kdel:	/* del */

+				l->p0 = del(&t->rasp, l->origin, a);

+				break;

+			case Knack:	/* ctrl-u */

+				l->p0 = ctlu(&t->rasp, l->origin, a);

+				break;

+			case Ketb:	/* ctrl-w */

+				l->p0 = ctlw(&t->rasp, l->origin, a);

+				break;

+			}

+			l->p1 = a;

+			if(l->p1 != l->p0){

+				/* cut locally if possible */

+				if(typestart<=l->p0 && l->p1<=typeend){

+					t->lock++;	/* to call hcut */

+					hcut(t->tag, l->p0, l->p1-l->p0);

+					/* hcheck is local because we know rasp is contiguous */

+					hcheck(t->tag);

+				}else{

+					flushtyping(0);

+					cut(t, t->front, 0, 1);

+				}

+			}

+			if(typeesc >= l->p0)

+				typeesc = l->p0;

+			if(typestart >= 0){

+				if(typestart >= l->p0)

+					typestart = l->p0;

+				typeend = l->p0;

+				if(typestart == typeend){

+					typestart = -1;

+					typeend = -1;

+					modified = 0;

+				}

+			}

+		}

+	}else if(c == Kstx){

+		t = &cmd;

+		for(l=t->l; l->textfn==0; l++)

+			;

+		current(l, 1, 1);

+		flushtyping(0);

+		a = t->rasp.nrunes;

+		flsetselect(l, a, a);

+		center(l, a);

+	}else if(c == Ksyn || c == Kbel){

+		int up = 1;

+		t = &cmd;

+		if(work != nil){

+			if(which != work){

+				current(work, 1, up);

+				return;

+			}

+	 		t = (Text*)work->user1;

+			l = &t->l[t->front];

+		}

+		if(t == &cmd || t->nwin == 1 && nname > 1){

+			if(flru.lnext == &flru)

+				return;

+			l = cycle(c == Kbel);

+			up = 0;

+		}else{

+	 		for(int i=t->front; (i = (i+1)%NL) != t->front; )

+	 			if(t->l[i].textfn != 0){

+	 				l = &t->l[i];

+	 				break;

+	 			}

+		}

+		current(l, 1, up);

+	}else{

+		if(c==Kesc && typeesc>=0){

+			l->p0 = typeesc;

+			l->p1 = a;

+			flushtyping(1);

+		}

+		for(l=t->l; l<&t->l[NL]; l++)

+			if(l->textfn)

+				flsetselect(l, l->p0, l->p1);

+	}

+}

+

+

+void

+outcmd(void){

+	if(work)

+		outTsll(Tworkfile, ((Text *)work->user1)->tag, work->p0, work->p1);

+}

+

+void

+panic(char *s)

+{

+	panic1(display, s);

+}

+

+void

+panic1(Display*, char *s)

+{

+	fprint(2, "jamterm: panic: ");

+	perror(s);

+	abort();

+}

+

+Rune*

+gettext(Flayer *l, long n, ulong *np)

+{

+	Text *t;

+

+	t = l->user1;

+	rload(&t->rasp, l->origin, l->origin+n, np);

+	return scratch;

+}

+

+long

+scrtotal(Flayer *l)

+{

+	return ((Text *)l->user1)->rasp.nrunes;

+}

+

+void*

+alloc(ulong n)

+{

+	void *p;

+

+	p = malloc(n);

+	if(p == 0)

+		panic("alloc");

+	memset(p, 0, n);

+	return p;

+}

--- /dev/null

+++ b/sys/src/cmd/jamterm/menu.c

@@ -1,0 +1,458 @@

+#include <u.h>

+#include <libc.h>

+#include <draw.h>

+#include <thread.h>

+#include <cursor.h>

+#include <mouse.h>

+#include <keyboard.h>

+#include <frame.h>

+#include "flayer.h"

+#include "samterm.h"

+

+uchar	**name;	/* first byte is ' ' or '\'': modified state */

+Text	**text;	/* pointer to Text associated with file */

+ushort	*tag;		/* text[i].tag, even if text[i] not defined */

+int	nname;

+int	mname;

+int	mw;

+

+char	*genmenu3(int);

+char	*genmenu2(int);

+char	*genmenu2c(int);

+

+enum Menu2

+{

+	Cut,

+	Paste,

+	Snarf,

+	Plumb,

+	Look,

+	Search,

+};

+

+enum Menu3

+{

+	New,

+	Zerox,

+	Resize,

+	Close,

+	Write,

+	NMENU3

+};

+

+char	*menu2str[] = {

+	"cut",

+	"paste",

+	"snarf",

+	"plumb",

+	"look",

+	nil,		/* storage for last pattern */

+};

+

+int	ncmd;

+int	ncbuf;

+char	**cmds;

+char	**clabels;

+

+char	*menu3str[] = {

+	"new",

+	"zerox",

+	"resize",

+	"close",

+	"write",

+};

+

+Menu	menu2 =	{0, genmenu2};

+Menu	menu2c ={0, genmenu2c};

+Menu	menu3 =	{0, genmenu3};

+

+extern int kekfd[2];

+

+typedef struct Menucmd Menucmd;

+struct Menucmd{

+	char *cmd;

+	Menucmd *next;

+}*menucmds;

+

+char*

+findmenucmd(int n){

+	Menucmd *m;

+

+	for(m = menucmds; n > 0 && m != nil; n--)

+		m = m->next;

+	if(n == 0 && m != nil)

+		return m->cmd;

+	return nil;

+}

+

+void

+menucmdhit(char *s)

+{

+	if(s == nil)

+		return;

+	outstart(Tmenucmdsend);

+	outcopy(strlen(s), (uchar*)s);

+	outsend();

+}

+

+void

+menu2hit(void)

+{

+	Text *t=(Text *)which->user1;

+	int w = which-t->l;

+	int m;

+

+	if(hversion==0 || plumbfd<0)

+		menu2str[Plumb] = "(plumb)";

+	m = menuhit(2, mousectl, t==&cmd? &menu2c : &menu2, nil);

+	if(hostlock || t->lock)

+		return;

+

+	switch(m){

+	case Cut:

+		cut(t, w, 1, 1);

+		break;

+

+	case Paste:

+		paste(t, w);

+		break;

+

+	case Snarf:

+		snarf(t, w);

+		break;

+

+	case Plumb:

+		if(hversion > 0)

+			outTsll(Tplumb, t->tag, which->p0, which->p1);

+		break;

+

+	case Look:

+		outTsll(Tlook, t->tag, which->p0, which->p1);

+		setlock();

+		break;

+

+	case Search:

+		if(t == &cmd || menu2str[Search] != nil){

+			outcmd();

+			if(t == &cmd)

+				outTsll(Tsend, 0 /*ignored*/, which->p0, which->p1);

+			else

+				outT0(Tsearch);

+			setlock();

+			break;

+		}

+	default:

+		m -= Search+(menu2str[Search] != nil);

+		menucmdhit(findmenucmd(m));

+		break;

+	}

+}

+

+void

+menu3hit(void)

+{

+	Rectangle r;

+	Flayer *l;

+	int m, i;

+	Text *t;

+

+	l = which;

+	mw = -1;

+	if(l != nil){

+		t = (Text *)l->user1;

+		menu3.lasthit = whichmenu(t->tag) + NMENU3;

+	}

+	switch(m = menuhit(3, mousectl, &menu3, nil)){

+	case -1:

+		break;

+

+	case New:

+		if(!hostlock)

+			sweeptext(1, 0);

+		break;

+

+	case Zerox:

+	case Resize:

+		if(hostlock || l == nil)

+			break;

+		if(promptrect(&r, l, m != Resize))

+			duplicate(l, r, l->f.font, m == Resize);

+		break;

+

+	case Close:

+		if(hostlock || l == nil)

+			break;

+		t=(Text *)l->user1;

+		if (t->nwin>1)

+			closeup(l);

+		else if(t!=&cmd) {

+			outTs(Tclose, t->tag);

+			setlock();

+		}

+		break;

+

+	case Write:

+		if(hostlock || l == nil)

+			break;

+		outTs(Twrite, ((Text *)l->user1)->tag);

+		setlock();

+		break;

+

+	default:

+		if(t = text[m-NMENU3]){

+			i = t->front;

+			if(t->nwin==0 || t->l[i].textfn==0)

+				return;	/* not ready yet; try again later */

+			if(t->nwin>1 && which==&t->l[i])

+				do

+					if(++i==NL)

+						i = 0;

+				while(i!=t->front && t->l[i].textfn==0);

+			if(&t->l[i] != which)

+				current(&t->l[i], 1, 1);

+		}else if(!hostlock)

+			sweeptext(0, tag[m-NMENU3]);

+		break;

+	}

+}

+

+Text *

+sweeptext(int new, int tag)

+{

+	Rectangle r;

+	Text *t;

+

+	if((t = mallocz(sizeof(*t), 1)) == nil)

+		return nil;

+	if(!promptrect(&r, nil, new))

+		return nil;

+	current((Flayer *)0, 0, 0);

+	flnew(&t->l[0], gettext, 0, (char *)t);

+	flinit(&t->l[0], r, font, maincols);	/*bnl*/

+	t->nwin = 1;

+	rinit(&t->rasp);

+	if(new)

+		startnewfile(Tstartnewfile, t);

+	else{

+		rinit(&t->rasp);

+		t->tag = tag;

+		startfile(t);

+	}

+	return t;

+}

+

+int

+whichmenu(int tg)

+{

+	int i;

+

+	for(i=0; i<nname; i++)

+		if(tag[i] == tg)

+			return i;

+	return -1;

+}

+

+void

+menuins(int n, uchar *s, Text *t, int m, int tg)

+{

+	int i;

+

+	if(nname == mname){

+		if(mname == 0)

+			mname = 32;

+		else

+			mname *= 2;

+		name = realloc(name, sizeof(name[0])*mname);

+		text = realloc(text, sizeof(text[0])*mname);

+		tag = realloc(tag, sizeof(tag[0])*mname);

+		if(name==nil || text==nil || tag==nil)

+			panic("realloc");

+	}

+	for(i=nname; i>n; --i)

+		name[i]=name[i-1], text[i]=text[i-1], tag[i]=tag[i-1];

+	text[n] = t;

+	tag[n] = tg;

+	name[n] = alloc(strlen((char*)s)+2);

+	name[n][0] = m;

+	strcpy((char*)name[n]+1, (char*)s);

+	nname++;

+	menu3.lasthit = n+NMENU3;

+}

+

+void

+menudel(int n)

+{

+	int i;

+

+	if(nname==0 || n>=nname || text[n])

+		panic("menudel");

+	free(name[n]);

+	--nname;

+	for(i = n; i<nname; i++)

+		name[i]=name[i+1], text[i]=text[i+1], tag[i]=tag[i+1];

+}

+

+void

+setpat(char *s)

+{

+	static char pat[17];

+

+	pat[0] = '/';

+	strncpy(pat+1, s, 15);

+	menu2str[Search] = pat;

+}

+

+void

+menucmd(char *s)

+{

+	Menucmd **mp, *m;

+

+	while(*s == ' ' || *s == '\t')

+		s++;

+	if(*s == 0){

+		outstart(Tmenucmd);

+		for(m = menucmds; m != nil; m = m->next){

+			outcopy(3, (uchar*)"\tM ");

+			outcopy(strlen(m->cmd), (uchar*)m->cmd);

+			outcopy(1, (uchar*)"\n");

+		}

+		outsend();

+		return;

+	}

+	for(mp = &menucmds; *mp != nil; mp = &(*mp)->next)

+		if(!strcmp(s, (*mp)->cmd)){

+			m = *mp;

+			*mp = m->next;

+			free(m->cmd);

+			free(m);

+			return;

+		}

+	*mp = m = malloc(sizeof(Menucmd));

+	if(m == nil) panic("malloc");

+	m->cmd = strdup(s);

+	m->next = nil;

+}

+

+#define	NBUF	64

+static uchar buf[NBUF*UTFmax]={' ', ' ', ' ', ' '};

+

+char *

+paren(char *s)

+{

+	uchar *t = buf;

+

+	*t++ = '(';

+	do; while(*t++ = *s++);

+	t[-1] = ')';

+	*t = 0;

+	return (char *)buf;

+}

+

+char*

+genmenu2(int n)

+{

+	Text *t=(Text *)which->user1;

+	char *p;

+	if(n < Search || n == Search && (menu2str[Search] != nil))

+		p = menu2str[n];

+	else{

+		n -= Search + (menu2str[Search] != nil);

+		p = findmenucmd(n);

+		if(p == nil)

+			return nil;

+	}

+	if(!hostlock && !t->lock

+	|| p == menu2str[Search]

+	|| p == menu2str[Look])

+		return p;

+	return paren(p);

+}

+char*

+genmenu2c(int n)

+{

+	Text *t=(Text *)which->user1;

+	char *p;

+	if(n < Search)

+		p = menu2str[n];

+	else if(n == Search)

+		p = "send";

+	else if((p = findmenucmd(n - Search-1)) == nil)

+		return nil;

+	if(!hostlock && !t->lock)

+		return p;

+	return paren(p);

+}

+char *

+genmenu3(int n)

+{

+	Text *t;

+	int c, i, k, l, w;

+	Rune r;

+	char *p;

+

+	if(n >= NMENU3+nname)

+		return 0;

+	if(n < NMENU3){

+		p = menu3str[n];

+		if(hostlock)

+			p = paren(p);

+		return p;

+	}

+	n -= NMENU3;

+	if(n == 0)	/* unless we've been fooled, this is cmd */

+		return (char *)&name[n][1];

+	if(mw == -1){

+		mw = 7;	/* strlen("~~jam~~"); */

+		for(i=1; i<nname; i++){

+			w = utflen((char*)name[i]+1)+4;	/* include "'+. " */

+			if(w > mw)

+				mw = w;

+		}

+	}

+	if(mw > NBUF)

+		mw = NBUF;

+	t = text[n];

+	buf[0] = name[n][0];

+	buf[1] = '-';

+	buf[2] = ' ';

+	buf[3] = ' ';

+	if(t){

+		if(t->nwin == 1)

+			buf[1] = '+';

+		else if(t->nwin > 1)

+			buf[1] = '*';

+		if(work && t==(Text *)work->user1) {

+			buf[2]= '.';

+			if(modified)

+				buf[0] = '\'';

+		}

+	}

+	l = utflen((char*)name[n]+1);

+	if(l > NBUF-4-2){

+		i = 4;

+		k = 1;

+		while(i < NBUF/2){

+			k += chartorune(&r, (char*)name[n]+k);

+			i++;

+		}

+		c = name[n][k];

+		name[n][k] = 0;

+		strcpy((char*)buf+4, (char*)name[n]+1);

+		name[n][k] = c;

+		strcat((char*)buf, "...");

+		while((l-i) >= NBUF/2-4){

+			k += chartorune(&r, (char*)name[n]+k);

+			i++;

+		}

+		strcat((char*)buf, (char*)name[n]+k);

+	}else

+		strcpy((char*)buf+4, (char*)name[n]+1);

+	i = utflen((char*)buf);

+	k = strlen((char*)buf);

+	while(i<mw && k<sizeof buf-1){

+		buf[k++] = ' ';

+		i++;

+	}

+	buf[k] = 0;

+	return (char *)buf;

+}

--- /dev/null

+++ b/sys/src/cmd/jamterm/mesg.c

@@ -1,0 +1,806 @@

+#include <u.h>

+#include <libc.h>

+#include <draw.h>

+#include <thread.h>

+#include <cursor.h>

+#include <mouse.h>

+#include <keyboard.h>

+#include <frame.h>

+#include <plumb.h>

+#include "flayer.h"

+#include "samterm.h"

+

+#define	HSIZE	3	/* Type + short count */

+Header	h;

+uchar	indata[DATASIZE+1];	/* room for NUL */

+uchar	outdata[DATASIZE];

+short	outcount;

+int	hversion;

+int	exiting;

+

+void	inmesg(Hmesg, int);

+int	inshort(int);

+long	inlong(int);

+vlong	invlong(int);

+void	hsetdot(int, long, long);

+void	hmoveto(int, long);

+void	hsetsnarf(int);

+void	hplumb(int);

+void	clrlock(void);

+int	snarfswap(char*, int, char**);

+

+void

+rcv(void)

+{

+	int c;

+	static state = 0;

+	static count = 0;

+	static i = 0;

+	static int errs = 0;

+

+	while((c=rcvchar()) != -1)

+		switch(state){

+		case 0:

+			h.type = c;

+			state++;

+			break;

+

+		case 1:

+			h.count0 = c;

+			state++;

+			break;

+

+		case 2:

+			h.count1 = c;

+			count = h.count0|(h.count1<<8);

+			i = 0;

+			if(count > DATASIZE){

+				if(++errs < 5){

+					dumperrmsg(count, h.type, h.count0, c);

+					state = 0;

+					continue;

+				}

+				fprint(2, "type %d count %d\n", h.type, count);

+				panic("count>DATASIZE");

+			}

+			if(count == 0)

+				goto zerocount;

+			state++;

+			break;

+

+		case 3:

+			indata[i++] = c;

+			if(i == count){

+		zerocount:

+				indata[i] = 0;

+				inmesg(h.type, count);

+				state = count = 0;

+				continue;

+			}

+			break;

+		}

+}

+

+Text *

+whichtext(int tg)

+{

+	int i;

+

+	for(i=0; i<nname; i++)

+		if(tag[i] == tg)

+			return text[i];

+	panic("whichtext");

+	return 0;

+}

+

+void

+inmesg(Hmesg type, int count)

+{

+	Text *t;

+	int i, m;

+	long l;

+	vlong vl;

+	Flayer *lp;

+

+	m = inshort(0);

+	l = inlong(2);

+	switch(type){

+	case -1:

+		panic("rcv error");

+	default:

+		fprint(2, "type %d\n", type);

+		panic("rcv unknown");

+

+	case Hversion:

+		hversion = m;

+		break;

+

+	case Hbindname:

+		vl = invlong(2);		/* for 64-bit pointers */

+		if((i=whichmenu(m)) < 0)

+			break;

+		/* in case of a race, a bindname may already have occurred */

+		if((t=whichtext(m)) == 0)

+			t=(Text *)vl;

+		else	/* let the old one win; clean up the new one */

+			while(((Text *)vl)->nwin>0)

+				closeup(&((Text *)vl)->l[((Text *)vl)->front]);

+		text[i] = t;

+		text[i]->tag = m;

+		break;

+

+	case Hcurrent:

+		if(whichmenu(m) < 0)

+			break;

+		if((t = whichtext(m)) == nil

+		&& (t = sweeptext(0, m)) == nil)

+			break;

+		if(t->l[t->front].textfn == nil)

+			panic("Hcurrent");

+		lp = &t->l[t->front];

+		if(which != nil && ((Text *)which->user1) == &cmd && m != cmd.tag){

+			flupfront(lp);

+			flborder(lp, 0);

+			work = lp;

+		}else

+			current(lp, 1, 1);

+		break;

+

+	case Hmovname:

+		if((m=whichmenu(m)) < 0)

+			break;

+		t = text[m];

+		l = tag[m];

+		i = name[m][0];

+		text[m] = 0;	/* suppress panic in menudel */

+		menudel(m);

+		if(t == &cmd)

+			m = 0;

+		else{

+			if (nname>0 && text[0]==&cmd)

+				m = 1;

+			else m = 0;

+			for(; m<nname; m++)

+				if(strcmp((char*)indata+2, (char*)name[m]+1)<0)

+					break;

+		}

+		menuins(m, indata+2, t, i, (int)l);

+		break;

+

+	case Hgrow:

+		if(whichmenu(m) >= 0)

+			hgrow(m, l, inlong(6), 1);

+		break;

+

+	case Hnewname:

+		menuins(0, (uchar *)"", (Text *)0, ' ', m);

+		break;

+

+	case Hcheck0:

+		i = whichmenu(m);

+		if(i>=0) {

+			t = text[i];

+			if(t)

+				t->lock++;

+			outTs(Tcheck, m);

+		}

+		break;

+

+	case Hcheck:

+		i = whichmenu(m);

+		if(i>=0) {

+			t = text[i];

+			if(t && t->lock)

+				t->lock--;

+			hcheck(m);

+		}

+		break;

+

+	case Hunlock:

+		clrlock();

+		break;

+

+	case Hdata:

+		if(whichmenu(m) >= 0)

+			l += hdata(m, l, indata+6, count-6);

+	Checkscroll:

+		if(m == cmd.tag){

+			for(i=0; i<NL; i++){

+				lp = &cmd.l[i];

+				if(lp->textfn)

+					center(lp, l>=0? l : lp->p1);

+			}

+		}

+		break;

+

+	case Horigin:

+		if(whichmenu(m) >= 0)

+			horigin(m, l);

+		break;

+

+	case Hunlockfile:

+		if(whichmenu(m)>=0 && (t = whichtext(m))->lock){

+			--t->lock;

+			l = -1;

+			goto Checkscroll;

+		}

+		break;

+

+	case Hsetdot:

+		if(whichmenu(m) >= 0)

+			hsetdot(m, l, inlong(6));

+		break;

+

+	case Hgrowdata:

+		if(whichmenu(m)<0)

+			break;

+		hgrow(m, l, inlong(6), 0);

+		whichtext(m)->lock++;	/* fake the request */

+		l += hdata(m, l, indata+10, count-10);

+		goto Checkscroll;

+

+	case Hmoveto:

+		if(whichmenu(m)>=0)

+			hmoveto(m, l);

+		break;

+

+	case Hclean:

+		if((m = whichmenu(m)) >= 0)

+			name[m][0] = ' ';

+		break;

+

+	case Hdirty:

+		if((m = whichmenu(m))>=0)

+			name[m][0] = '\'';

+		break;

+

+	case Hdelname:

+		if((m=whichmenu(m)) >= 0)

+			menudel(m);

+		break;

+

+	case Hcut:

+		if(whichmenu(m) >= 0)

+			hcut(m, l, inlong(6));

+		break;

+

+	case Hclose:

+		if(whichmenu(m)<0 || (t = whichtext(m))==0)

+			break;

+		l = t->nwin;

+		for(i = 0,lp = t->l; l>0 && i<NL; i++,lp++)

+			if(lp->textfn){

+				closeup(lp);

+				--l;

+			}

+		break;

+

+	case Hsetpat:

+		setpat((char *)indata);

+		break;

+

+	case Hsetsnarf:

+		hsetsnarf(m);

+		break;

+

+	case Hsnarflen:

+		snarflen = inlong(0);

+		break;

+

+	case Hack:

+		outT0(Tack);

+		break;

+

+	case Hexit:

+		exiting = 1;

+		outT0(Texit);

+		threadexitsall(nil);

+		break;

+

+	case Hplumb:

+		hplumb(m);

+		break;

+

+	case Hmenucmd:

+		menucmd((char *)indata);

+		break;

+	}

+}

+

+void

+setlock(void)

+{

+	hostlock++;

+	setcursor(mousectl, cursor = &lockarrow);

+}

+

+void

+clrlock(void)

+{

+	hasunlocked = 1;

+	if(hostlock > 0)

+		hostlock--;

+	if(hostlock == 0)

+		setcursor(mousectl, cursor=(Cursor *)0);

+}

+

+void

+startfile(Text *t)

+{

+	outTsv(Tstartfile, t->tag, (vlong)t);	/* for 64-bit pointers */

+	setlock();

+}

+

+void

+startnewfile(int type, Text *t)

+{

+	t->tag = Untagged;

+	outTv(type, (vlong)t);			/* for 64-bit pointers */

+}

+

+int

+inshort(int n)

+{

+	return indata[n]|(indata[n+1]<<8);

+}

+

+long

+inlong(int n)

+{

+	return indata[n]|(indata[n+1]<<8)|

+		((long)indata[n+2]<<16)|((long)indata[n+3]<<24);

+}

+

+vlong

+invlong(int n)

+{

+	vlong v;

+

+	v = (indata[n+7]<<24) | (indata[n+6]<<16) | (indata[n+5]<<8) | indata[n+4];

+	v = (v<<16) | (indata[n+3]<<8) | indata[n+2];

+	v = (v<<16) | (indata[n+1]<<8) | indata[n];

+	return v;

+}

+

+void

+outT0(Tmesg type)

+{

+	outstart(type);

+	outsend();

+}

+

+void

+outTl(Tmesg type, long l)

+{

+	outstart(type);

+	outlong(l);

+	outsend();

+}

+

+void

+outTs(Tmesg type, int s)

+{

+	outstart(type);

+	outshort(s);

+	outsend();

+}

+

+void

+outTss(Tmesg type, int s1, int s2)

+{

+	outstart(type);

+	outshort(s1);

+	outshort(s2);

+	outsend();

+}

+

+void

+outTsll(Tmesg type, int s1, long l1, long l2)

+{

+	outstart(type);

+	outshort(s1);

+	outlong(l1);

+	outlong(l2);

+	outsend();

+}

+

+void

+outTsl(Tmesg type, int s1, long l1)

+{

+	outstart(type);

+	outshort(s1);

+	outlong(l1);

+	outsend();

+}

+

+void

+outTsv(Tmesg type, int s1, vlong v1)

+{

+	outstart(type);

+	outshort(s1);

+	outvlong(v1);

+	outsend();

+}

+

+void

+outTv(Tmesg type, vlong v1)

+{

+	outstart(type);

+	outvlong(v1);

+	outsend();

+}

+

+void

+outTslS(Tmesg type, int s1, long l1, Rune *s)

+{

+	char buf[DATASIZE*UTFmax+1];

+	char *c;

+

+	outstart(type);

+	outshort(s1);

+	outlong(l1);

+	c = buf;

+	while(*s)

+		c += runetochar(c, s++);

+	*c++ = 0;

+	outcopy(c-buf, (uchar *)buf);

+	outsend();

+}

+

+void

+outTsls(Tmesg type, int s1, long l1, int s2)

+{

+	outstart(type);

+	outshort(s1);

+	outlong(l1);

+	outshort(s2);

+	outsend();

+}

+

+void

+outstart(Tmesg type)

+{

+	outdata[0] = type;

+	outcount = 0;

+}

+

+void

+outcopy(int count, uchar *data)

+{

+	while(count--)

+		outdata[HSIZE+outcount++] = *data++;	

+}

+

+void

+outshort(int s)

+{

+	uchar buf[2];

+

+	buf[0]=s;

+	buf[1]=s>>8;

+	outcopy(2, buf);

+}

+

+void

+outlong(long l)

+{

+	uchar buf[4];

+

+	buf[0]=l;

+	buf[1]=l>>8;

+	buf[2]=l>>16;

+	buf[3]=l>>24;

+	outcopy(4, buf);

+}

+

+void

+outvlong(vlong v)

+{

+	int i;

+	uchar buf[8];

+

+	for(i = 0; i < sizeof(buf); i++){

+		buf[i] = v;

+		v >>= 8;

+	}

+

+	outcopy(8, buf);

+}

+

+void

+outsend(void)

+{

+	if(outcount>DATASIZE-HSIZE)

+		panic("outcount>sizeof outdata");

+	outdata[1]=outcount;

+	outdata[2]=outcount>>8;

+	if(write(1, (char *)outdata, outcount+HSIZE)!=outcount+HSIZE)

+		panic("write error");

+}

+

+

+void

+hsetdot(int m, long p0, long p1)

+{

+	Text *t = whichtext(m);

+	Flayer *l = &t->l[t->front];

+

+	flushtyping(1);

+	flsetselect(l, p0, p1);

+}

+

+void

+horigin(int m, long p0)

+{

+	Text *t = whichtext(m);

+	Flayer *l = &t->l[t->front];

+	long a;

+	ulong n;

+	Rune *r;

+

+	if(!flprepare(l)){

+		l->origin = p0;

+		return;

+	}

+	a = p0-l->origin;

+	if(a>=0 && a<l->f.nchars)

+		frdelete(&l->f, 0, a);

+	else if(a<0 && -a<l->f.nchars){

+		r = rload(&t->rasp, p0, l->origin, &n);

+		frinsert(&l->f, r, r+n, 0);

+	}else

+		frdelete(&l->f, 0, l->f.nchars);

+	l->origin = p0;

+	scrdraw(l, t->rasp.nrunes);

+	if(l->visible==Some)

+		flrefresh(l, l->entire, 0);

+	hcheck(m);

+}

+

+void

+hmoveto(int m, long p0)

+{

+	Text *t = whichtext(m);

+	Flayer *l = &t->l[t->front];

+

+	if(p0<l->origin || p0-l->origin>l->f.nchars*9/10)

+		outTsll(Torigin, m, p0, 2L);

+}

+

+void

+hcheck(int m)

+{

+	Flayer *l;

+	Text *t;

+	int reqd = 0, i;

+	long n, nl, a;

+	Rune *r;

+

+	if(m == Untagged)

+		return;

+	t = whichtext(m);

+	if(t == 0)		/* possible in a half-built window */

+		return;

+	for(l = &t->l[0], i = 0; i<NL; i++, l++){

+		if(l->textfn==0 || !flprepare(l))	/* BUG: don't

+							   need this if BUG below

+							   is fixed */

+			continue;

+		a = t->l[i].origin;

+		n = rcontig(&t->rasp, a, a+l->f.nchars, 1);

+		if(n<l->f.nchars)	/* text missing in middle of screen */

+			a+=n;

+		else{			/* text missing at end of screen? */

+        Again:

+		 	if(l->f.lastlinefull)

+				goto Checksel;	/* all's well */

+			a = t->l[i].origin+l->f.nchars;

+			n = t->rasp.nrunes-a;

+			if(n==0)

+				goto Checksel;

+			if(n>TBLOCKSIZE)

+				n = TBLOCKSIZE;

+			n = rcontig(&t->rasp, a, a+n, 1);

+			if(n>0){

+				rload(&t->rasp, a, a+n, 0);

+				nl = l->f.nchars;

+				r = scratch;

+				flinsert(l, r, r+n, l->origin+nl);

+				if(nl == l->f.nchars)	/* made no progress */

+					goto Checksel;

+				goto Again;

+			}

+		}

+		if(!reqd){

+			n = rcontig(&t->rasp, a, a+TBLOCKSIZE, 0);

+			if(n <= 0)

+				panic("hcheck request==0");

+			outTsls(Trequest, m, a, (int)n);

+			outTs(Tcheck, m);

+			t->lock++;	/* for the Trequest */

+			t->lock++;	/* for the Tcheck */

+			reqd++;

+		}

+	    Checksel:

+		flsetselect(l, l->p0, l->p1);

+	}

+}

+

+void

+flnewlyvisible(Flayer *l)

+{

+	hcheck(((Text *)l->user1)->tag);

+}

+

+void

+hsetsnarf(int nc)

+{

+	char *s2;

+	char *s1;

+	int i;

+	int n;

+

+	setcursor(mousectl, &deadmouse);

+	s2 = alloc(nc+1);

+	for(i=0; i<nc; i++)

+		s2[i] = getch();

+	s2[nc] = 0;

+	n = snarfswap(s2, nc, &s1);

+	if(n >= 0){

+		if(!s1)

+			n = 0;

+		s1 = realloc(s1, n+1);

+		if (!s1)

+			panic("realloc");

+		s1[n] = 0;

+		snarflen = n;

+		outTs(Tsetsnarf, n);

+		if(n>0 && write(1, s1, n)!=n)

+			panic("snarf write error");

+		free(s1);

+	}else

+		outTs(Tsetsnarf, 0);

+	free(s2);

+	setcursor(mousectl, cursor);

+}

+

+void

+hplumb(int nc)

+{

+	int i;

+	char *s;

+	Plumbmsg *m;

+

+	s = alloc(nc);

+	for(i=0; i<nc; i++)

+		s[i] = getch();

+	if(plumbfd >= 0){

+		m = plumbunpack(s, nc);

+		if(m != 0)

+			plumbsend(plumbfd, m);

+		plumbfree(m);

+	}

+	free(s);

+}

+

+void

+hgrow(int m, long a, long new, int req)

+{

+	int i;

+	Flayer *l;

+	Text *t = whichtext(m);

+	long o, b;

+

+	if(new <= 0)

+		panic("hgrow");

+	rresize(&t->rasp, a, 0L, new);

+	for(l = &t->l[0], i = 0; i<NL; i++, l++){

+		if(l->textfn == 0)

+			continue;

+		o = l->origin;

+		b = a-o-rmissing(&t->rasp, o, a);

+		if(a < o)

+			l->origin+=new;

+		if(a < l->p0)

+			l->p0+=new;

+		if(a < l->p1)

+			l->p1+=new;

+		/* must prevent b temporarily becoming unsigned */

+		if(!req || a<o || (b>0 && b>l->f.nchars) ||

+		    (l->f.nchars==0 && a-o>0))

+			continue;

+		if(new>TBLOCKSIZE)

+			new = TBLOCKSIZE;

+		outTsls(Trequest, m, a, (int)new);

+		t->lock++;

+		req = 0;

+	}

+}

+

+int

+hdata1(Text *t, long a, Rune *r, int len)

+{

+	int i;

+	Flayer *l;

+	long o, b;

+

+	for(l = &t->l[0], i=0; i<NL; i++, l++){

+		if(l->textfn==0)

+			continue;

+		o = l->origin;

+		b = a-o-rmissing(&t->rasp, o, a);

+		/* must prevent b temporarily becoming unsigned */

+		if(a<o || (b>0 && b>l->f.nchars))

+			continue;

+		flinsert(l, r, r+len, o+b);

+	}

+	rdata(&t->rasp, a, a+len, r);

+	rclean(&t->rasp);

+	return len;

+}

+

+int

+hdata(int m, long a, uchar *s, int len)

+{

+	int i, w;

+	Text *t = whichtext(m);

+	Rune buf[DATASIZE], *r;

+

+	if(t->lock)

+		--t->lock;

+	if(len == 0)

+		return 0;

+	r = buf;

+	for(i=0; i<len; i+=w,s+=w)

+		w = chartorune(r++, (char*)s);

+	return hdata1(t, a, buf, r-buf);

+}

+

+int

+hdatarune(int m, long a, Rune *r, int len)

+{

+	Text *t = whichtext(m);

+

+	if(t->lock)

+		--t->lock;

+	if(len == 0)

+		return 0;

+	return hdata1(t, a, r, len);

+}

+

+void

+hcut(int m, long a, long old)

+{

+	Flayer *l;

+	Text *t = whichtext(m);

+	int i;

+	long o, b;

+

+	if(t->lock)

+		--t->lock;

+	for(l = &t->l[0], i = 0; i<NL; i++, l++){

+		if(l->textfn == 0)

+			continue;

+		o = l->origin;

+		b = a-o-rmissing(&t->rasp, o, a);

+		/* must prevent b temporarily becoming unsigned */

+		if((b<0 || b<l->f.nchars) && a+old>=o){

+			fldelete(l, b<0? o : o+b,

+			    a+old-rmissing(&t->rasp, o, a+old));

+		}

+		if(a+old<o)

+			l->origin-=old;

+		else if(a<=o)

+			l->origin = a;

+		if(a+old<l->p0)

+			l->p0-=old;

+		else if(a<=l->p0)

+			l->p0 = a;

+		if(a+old<l->p1)

+			l->p1-=old;

+		else if(a<=l->p1)

+			l->p1 = a;

+	}

+	rresize(&t->rasp, a, old, 0L);

+	rclean(&t->rasp);

+}

--- /dev/null

+++ b/sys/src/cmd/jamterm/mkfile

@@ -1,0 +1,37 @@

+</$objtype/mkfile

+

+TARG=jamterm

+OFILES=main.$O\

+	icons.$O\

+	menu.$O\

+	mesg.$O\

+	rasp.$O\

+	scroll.$O\

+	flayer.$O\

+	io.$O\

+	plan9.$O\

+	win.$O\

+

+HFILES=samterm.h\

+	flayer.h\

+	/sys/include/frame.h\

+

+LIB=	/$objtype/lib/libdraw.a\

+	/$objtype/lib/libframe.a\

+

+BIN=/$objtype/bin/aux

+

+UPDATE=\

+	mkfile\

+	$HFILES\

+	${OFILES:%.$O=%.c}\

+

+</sys/src/cmd/mkone

+

+CFLAGS=-I../jam $CFLAGS

+

+mesg.$O:	../jam/mesg.h

+

+syms:V:

+	$CC -a $CFLAGS main.c		 > syms

+	for(i in *.c) $CC -aa $CFLAGS $i >> syms

--- /dev/null

+++ b/sys/src/cmd/jamterm/plan9.c

@@ -1,0 +1,278 @@

+#include <u.h>

+#include <libc.h>

+#include <draw.h>

+#include <thread.h>

+#include <mouse.h>

+#include <keyboard.h>

+#include <frame.h>

+#include <plumb.h>

+#include "flayer.h"

+#include "samterm.h"

+

+enum {

+	STACK = 4096,

+};

+

+static char exname[64];

+

+void

+usage(void)

+{

+	fprint(2, "usage: jamterm [-Ai]\n");

+	threadexitsall("usage");

+}

+

+void

+getscreen(int argc, char **argv)

+{

+	char *t;

+

+	ARGBEGIN{

+	case 'A':

+		autoindent = 0;

+		break;

+	case 'i':

+		spacesindent = 1;

+		break;

+	default:

+		usage();

+	}ARGEND

+

+	if(initdraw(panic1, nil, "jam") < 0){

+		fprint(2, "jamterm: initdraw: %r\n");

+		threadexitsall("init");

+	}

+	t = getenv("tabstop");

+	if(t != nil)

+		maxtab = strtoul(t, nil, 0);

+	free(t);

+	flstart(screen->clipr);

+	draw(screen, screen->clipr, maincols[BACK], nil, ZP);

+}

+

+int

+screensize(int *w, int *h)

+{

+	int fd, n;

+	char buf[5*12+1];

+

+	fd = open("/dev/screen", OREAD);

+	if(fd < 0)

+		return 0;

+	n = read(fd, buf, sizeof(buf)-1);

+	close(fd);

+	if (n != sizeof(buf)-1)

+		return 0;

+	buf[n] = 0;

+	if (h) {

+		*h = atoi(buf+4*12)-atoi(buf+2*12);

+		if (*h < 0)

+			return 0;

+	}

+	if (w) {

+		*w = atoi(buf+3*12)-atoi(buf+1*12);

+		if (*w < 0)

+			return 0;

+	}

+	return 1;

+}

+

+int

+snarfswap(char *fromsam, int nc, char **tosam)

+{

+	char *s1;

+	int f, n, ss;

+

+	f = open("/dev/snarf", 0);

+	if(f < 0)

+		return -1;

+	ss = SNARFSIZE;

+	if(hversion < 2)

+		ss = 4096;

+	*tosam = s1 = alloc(ss);

+	n = read(f, s1, ss-1);

+	close(f);

+	if(n < 0)

+		n = 0;

+	if (n == 0) {

+		*tosam = 0;

+		free(s1);

+	} else

+		s1[n] = 0;

+	f = create("/dev/snarf", 1, 0666);

+	if(f >= 0){

+		write(f, fromsam, nc);

+		close(f);

+	}

+	return n;

+}

+

+void

+dumperrmsg(int count, int type, int count0, int c)

+{

+	fprint(2, "jamterm: host mesg: count %d %ux %ux %ux %s...ignored\n",

+		count, type, count0, c, rcvstring());

+}

+

+void

+removeextern(void)

+{

+	remove(exname);

+}

+

+Readbuf	hostbuf[2];

+Readbuf	plumbbuf[4];

+

+int kekfd[2];

+

+void

+extproc(void *chan)

+{

+	Channel *c;

+	int i, n, which;

+

+	c = chan;

+	close(kekfd[1]);

+	i = 3;

+	for(;;){

+		i = i == 2 ? 3 : 2;	/* toggle */

+		n = read(kekfd[0], plumbbuf[i].data, sizeof plumbbuf[i].data);

+		if(n <= 0){

+			fprint(2, "jamterm: extern read error: %r\n");

+			threadexits("extern");	/* not a fatal error */

+		}

+		plumbbuf[i].n = n;

+		which = i;

+		send(c, &which);

+	}

+}

+

+int

+plumbformat(int i)

+{

+	Plumbmsg *m;

+	char *addr, *data, *act;

+	int n;

+

+	data = (char*)plumbbuf[i].data;

+	m = plumbunpack(data, plumbbuf[i].n);

+	if(m == nil)

+		return 0;

+	n = m->ndata;

+	if(n == 0){

+		plumbfree(m);

+		return 0;

+	}

+	act = plumblookup(m->attr, "action");

+	if(act!=nil && strcmp(act, "showfile")!=0){

+		/* can't handle other cases yet */

+		plumbfree(m);

+		return 0;

+	}

+	addr = plumblookup(m->attr, "addr");

+	if(addr){

+		if(addr[0] == '\0')

+			addr = nil;

+		else

+			addr = strdup(addr);	/* copy to safe storage; we'll overwrite data */

+	}

+	memmove(data, "B ", 2);	/* we know there's enough room for this */

+	memmove(data+2, m->data, n);

+	n += 2;

+	if(data[n-1] != '\n')

+		data[n++] = '\n';

+	if(addr != nil){

+		if(n+strlen(addr)+1+1 <= READBUFSIZE)

+			n += sprint(data+n, "%s\n", addr);

+		free(addr);

+	}

+	plumbbuf[i].n = n;

+	plumbfree(m);

+	return 1;

+}

+

+void

+plumbproc(void *argv)

+{

+	Channel *c;

+	int i, n, which, *fdp;

+	void **arg;

+

+	arg = argv;

+	c = arg[0];

+	fdp = arg[1];

+

+	i = 0;

+	for(;;){

+		i = 1-i;	/* toggle */

+		n = read(*fdp, plumbbuf[i].data, READBUFSIZE);

+		if(n <= 0){

+			fprint(2, "jamterm: plumb read error: %r\n");

+			threadexits("plumb");	/* not a fatal error */

+		}

+		plumbbuf[i].n = n;

+		if(plumbformat(i)){

+			which = i;

+			send(c, &which);

+		}

+	}

+}

+

+int

+plumbstart(void)

+{

+	static int fd;

+	static void *arg[2];

+

+	plumbfd = plumbopen("send", OWRITE|OCEXEC);	/* not open is ok */

+	fd = plumbopen("edit", OREAD|OCEXEC);

+	if(fd < 0)

+		return -1;

+	plumbc = chancreate(sizeof(int), 0);

+	if(plumbc == nil){

+		close(fd);

+		return -1;

+	}

+	arg[0] =plumbc;

+	arg[1] = &fd;

+	proccreate(plumbproc, arg, STACK);

+	if(pipe(kekfd) < 0)

+		return 1;

+	procrfork(extproc, plumbc, STACK, RFFDG);

+	close(kekfd[0]);

+	return 1;

+}

+

+void

+hostproc(void *arg)

+{

+	Channel *c;

+	int i, n, which;

+

+	c = arg;

+

+	i = 0;

+	for(;;){

+		i = 1-i;	/* toggle */

+		n = read(0, hostbuf[i].data, sizeof hostbuf[i].data);

+		if(n <= 0){

+			if(n==0){

+				if(exiting)

+					threadexits(nil);

+				werrstr("unexpected eof");

+			}

+			fprint(2, "jamterm: host read error: %r\n");

+			threadexitsall("host");

+		}

+		hostbuf[i].n = n;

+		which = i;

+		send(c, &which);

+	}

+}

+

+void

+hoststart(void)

+{

+	hostc = chancreate(sizeof(int), 0);

+	proccreate(hostproc, hostc, STACK);

+}

--- /dev/null

+++ b/sys/src/cmd/jamterm/rasp.c

@@ -1,0 +1,265 @@

+#include <u.h>

+#include <libc.h>

+#include <draw.h>

+#include <thread.h>

+#include <mouse.h>

+#include <keyboard.h>

+#include <frame.h>

+#include "flayer.h"

+#include "samterm.h"

+

+void

+rinit(Rasp *r)

+{

+	r->nrunes=0;

+	r->sect=0;

+}

+

+void

+rclear(Rasp *r)

+{

+	Section *s, *ns;

+

+	for(s=r->sect; s; s=ns){

+		ns = s->next;

+		free(s->text);

+		free(s);

+	}

+	r->sect = 0;

+}

+

+Section*

+rsinsert(Rasp *r, Section *s)	/* insert before s */

+{

+	Section *t;

+	Section *u;

+

+	t = alloc(sizeof(Section));

+	if(r->sect == s){	/* includes empty list case: r->sect==s==0 */

+		r->sect = t;

+		t->next = s;

+	}else{

+		u = r->sect;

+		if(u == 0)

+			panic("rsinsert 1");

+		do{

+			if(u->next == s){

+				t->next = s;

+				u->next = t;

+				goto Return;

+			}

+			u=u->next;

+		}while(u);

+		panic("rsinsert 2");

+	}

+    Return:

+	return t;

+}

+

+void

+rsdelete(Rasp *r, Section *s)

+{

+	Section *t;

+

+	if(s == 0)

+		panic("rsdelete");

+	if(r->sect == s){

+		r->sect = s->next;

+		goto Free;

+	}

+	for(t=r->sect; t; t=t->next)

+		if(t->next == s){

+			t->next = s->next;

+	Free:

+			if(s->text)

+				free(s->text);

+			free(s);

+			return;

+		}

+	panic("rsdelete 2");

+}

+

+void

+splitsect(Rasp *r, Section *s, long n0)

+{

+	if(s == 0)

+		panic("splitsect");

+	rsinsert(r, s->next);

+	if(s->text == 0)

+		s->next->text = 0;

+	else{

+		s->next->text = alloc(RUNESIZE*(TBLOCKSIZE+1));

+		Strcpy(s->next->text, s->text+n0);

+		s->text[n0] = 0;

+	}

+	s->next->nrunes = s->nrunes-n0;

+	s->nrunes = n0;

+}

+

+Section *

+findsect(Rasp *r, Section *s, long p, long q)	/* find sect containing q and put q on a sect boundary */

+{

+	if(s==0 && p!=q)

+		panic("findsect");

+	for(; s && p+s->nrunes<=q; s=s->next)

+		p += s->nrunes;

+	if(p != q){

+		splitsect(r, s, q-p);

+		s = s->next;

+	}

+	return s;

+}

+

+void

+rresize(Rasp *r, long a, long old, long new)

+{

+	Section *s, *t, *ns;

+

+	s = findsect(r, r->sect, 0L, a);

+	t = findsect(r, s, a, a+old);

+	for(; s!=t; s=ns){

+		ns=s->next;

+		rsdelete(r, s);

+	}

+	/* now insert the new piece before t */

+	if(new > 0){

+		ns=rsinsert(r, t);

+		ns->nrunes=new;

+		ns->text=0;

+	}

+	r->nrunes += new-old;

+}

+

+void

+rdata(Rasp *r, long p0, long p1, Rune *cp)

+{

+	Section *s, *t, *ns;

+

+	s = findsect(r, r->sect, 0L, p0);

+	t = findsect(r, s, p0, p1);

+	for(; s!=t; s=ns){

+		ns=s->next;

+		if(s->text)

+			panic("rdata");

+		rsdelete(r, s);

+	}

+	p1 -= p0;

+	s = rsinsert(r, t);

+	s->text = alloc(RUNESIZE*(TBLOCKSIZE+1));

+	memmove(s->text, cp, RUNESIZE*p1);

+	s->text[p1] = 0;

+	s->nrunes = p1;

+}

+

+void

+rclean(Rasp *r)

+{

+	Section *s;

+

+	for(s=r->sect; s; s=s->next)

+		while(s->next && (s->text!=0)==(s->next->text!=0)){

+			if(s->text){

+				if(s->nrunes+s->next->nrunes>TBLOCKSIZE)

+					break;

+				Strcpy(s->text+s->nrunes, s->next->text);

+			}

+			s->nrunes += s->next->nrunes;

+			rsdelete(r, s->next);

+		}

+}

+

+void

+Strcpy(Rune *to, Rune *from)

+{

+	do; while(*to++ = *from++);

+}

+

+Rune*

+rload(Rasp *r, ulong p0, ulong p1, ulong *nrp)

+{

+	Section *s;

+	long p;

+	int n, nb;

+

+	nb = 0;

+	Strgrow(&scratch, &nscralloc, p1-p0+1);

+	scratch[0] = 0;

+	for(p=0,s=r->sect; s && p+s->nrunes<=p0; s=s->next)

+		p += s->nrunes;

+	while(p<p1 && s){

+		/*

+		 * Subtle and important.  If we are preparing to handle an 'rdata'

+		 * call, it's because we have an 'rresize' hole here, so the

+		 * screen doesn't have data for that space anyway (it got cut

+		 * first).  So pretend it isn't there.

+		 */

+		if(s->text){

+			n = s->nrunes-(p0-p);

+			if(n>p1-p0)	/* all in this section */

+				n = p1-p0;

+			memmove(scratch+nb, s->text+(p0-p), n*RUNESIZE);

+			nb += n;

+			scratch[nb] = 0;

+		}

+		p += s->nrunes;

+		p0 = p;

+		s = s->next;

+	}

+	if(nrp)

+		*nrp = nb;

+	return scratch;

+}

+

+int

+rmissing(Rasp *r, ulong p0, ulong p1)

+{

+	Section *s;

+	long p;

+	int n, nm=0;

+

+	for(p=0,s=r->sect; s && p+s->nrunes<=p0; s=s->next)

+		p += s->nrunes;

+	while(p<p1 && s){

+		if(s->text == 0){

+			n = s->nrunes-(p0-p);

+			if(n > p1-p0)	/* all in this section */

+				n = p1-p0;

+			nm += n;

+		}

+		p += s->nrunes;

+		p0 = p;

+		s = s->next;

+	}

+	return nm;

+}

+

+int

+rcontig(Rasp *r, ulong p0, ulong p1, int text)

+{

+	Section *s;

+	long p, n;

+	int np=0;

+

+	for(p=0,s=r->sect; s && p+s->nrunes<=p0; s=s->next)

+		p += s->nrunes;

+	while(p<p1 && s && (text? (s->text!=0) : (s->text==0))){

+		n = s->nrunes-(p0-p);

+		if(n > p1-p0)	/* all in this section */

+			n = p1-p0;

+		np += n;

+		p += s->nrunes;

+		p0 = p;

+		s = s->next;

+	}

+	return np;

+}

+

+void

+Strgrow(Rune **s, long *n, int want)	/* can always toss the old data when called */

+{

+	if(*n >= want)

+		return;

+	free(*s);

+	*s = alloc(RUNESIZE*want);

+	*n = want;

+}

--- /dev/null

+++ b/sys/src/cmd/jamterm/samterm.h

@@ -1,0 +1,186 @@

+#define	SAMTERM

+

+#define	RUNESIZE	sizeof(Rune)

+#define	MAXFILES	256

+#define	READBUFSIZE 8192

+#define	NL	10

+

+enum{

+	Up,

+	Down,

+

+	Kbel=0x7,

+	Ksyn = 0x16,

+};

+

+typedef struct Text	Text;

+typedef struct Section	Section;

+typedef struct Rasp	Rasp;

+typedef struct Readbuf Readbuf;

+

+struct Section

+{

+	long	nrunes;

+	Rune	*text;		/* if null, we haven't got it */

+	Section	*next;

+};

+

+struct Rasp

+{

+	long	nrunes;

+	Section	*sect;

+};

+

+#define	Untagged	((ushort)65535)

+

+struct Text

+{

+	Rasp	rasp;

+	short	nwin;

+	short	front;		/* input window */

+	ushort	tag;

+	char	lock;

+	Flayer	l[NL];		/* screen storage */

+};

+

+struct Readbuf

+{

+	short	n;					/* # bytes in buf */

+	uchar	data[READBUFSIZE];		/* data bytes */

+};

+

+enum Resource

+{

+	RHost,

+	RKeyboard,

+	RMouse,

+	RPlumb,

+	RResize,

+	NRes,

+};

+

+extern Text	**text;

+extern uchar	**name;

+extern ushort	*tag;

+extern int	nname;

+extern int	mname;

+extern Cursor	deadmouse;

+extern Cursor	lockarrow;

+extern Cursor	*cursor;

+extern Flayer	*which;

+extern Flayer	*work;

+extern Text	cmd;

+extern Rune	*scratch;

+extern long	nscralloc;

+extern char	hostlock;

+extern char	hasunlocked;

+extern long	snarflen;

+extern Mousectl* mousectl;

+extern Keyboardctl* keyboardctl;

+extern Mouse*	mousep;

+extern long	modified;

+extern int	maxtab;

+extern Readbuf	hostbuf[2];	/* double buffer; it's synchronous communication */

+extern Readbuf	plumbbuf[4];	/* double buffer; it's synchronous communication */

+extern Channel *plumbc;

+extern Channel *hostc;

+extern int	hversion;

+extern int	plumbfd;

+extern int	exiting;

+extern int	autoindent;

+extern int	spacesindent;

+

+Rune	*gettext(Flayer*, long, ulong*);

+void	*alloc(ulong n);

+

+void	iconinit(void);

+void	getscreen(int, char**);

+void	initio(void);

+void	setlock(void);

+void	outcmd(void);

+void	rinit(Rasp*);

+void	startnewfile(int, Text*);

+void	getmouse(void);

+void	mouseunblock(void);

+void	kbdblock(void);

+void	hoststart(void);

+int	plumbstart(void);

+int	button(int but);

+int	load(char*, int);

+int	waitforio(void);

+int	rcvchar(void);

+int	getch(void);

+int	kbdchar(void);

+int	qpeekc(void);

+void	cut(Text*, int, int, int);

+void	paste(Text*, int);

+void	snarf(Text*, int);

+int	center(Flayer*, long);

+int	xmenuhit(int, Menu*);

+void	buttons(int);

+void	warpmouse(Flayer*);

+void	current(Flayer*, int, int);

+void	duplicate(Flayer*, Rectangle, Font*, int);

+void	startfile(Text*);

+void	panic(char*);

+void	panic1(Display*, char*);

+void	closeup(Flayer*);

+void	Strgrow(Rune**, long*, int);

+int	RESIZED(void);

+void	resize(void);

+void	rcv(void);

+void	type(Flayer*, int);

+void	menu2hit(void);

+void	menu3hit(void);

+void	scroll(Flayer*, int);

+void	hcheck(int);

+void	rclear(Rasp*);

+int	whichmenu(int);

+void	hcut(int, long, long);

+void	horigin(int, long);

+void	hgrow(int, long, long, int);

+int	hdata(int, long, uchar*, int);

+int	hdatarune(int, long, Rune*, int);

+Rune	*rload(Rasp*, ulong, ulong, ulong*);

+void	menuins(int, uchar*, Text*, int, int);

+void	menudel(int);

+Rectangle	expandempty(Point, Flayer*, int);

+Text	*sweeptext(int, int);

+void	setpat(char*);

+void	menucmd(char*);

+void	scrdraw(Flayer*, long tot);

+int	rcontig(Rasp*, ulong, ulong, int);

+int	rmissing(Rasp*, ulong, ulong);

+void	rresize(Rasp *, long, long, long);

+void	rdata(Rasp*, long, long, Rune*);

+void	rclean(Rasp*);

+void	scrorigin(Flayer*, int, long);

+long	scrtotal(Flayer*);

+void	flnewlyvisible(Flayer*);

+char	*rcvstring(void);

+void	Strcpy(Rune*, Rune*);

+void	Strncpy(Rune*, Rune*, long);

+void	flushtyping(int);

+void	dumperrmsg(int, int, int, int);

+int	screensize(int*,int*);

+void	getmouse(void);

+Rectangle inflatepoint(Point);

+int	promptrect(Rectangle*, Flayer*, int);

+Rectangle	defaultcmdrect(void);

+

+#include "mesg.h"

+

+void	outTs(Tmesg, int);

+void	outT0(Tmesg);

+void	outTl(Tmesg, long);

+void	outTslS(Tmesg, int, long, Rune*);

+void	outTsll(Tmesg, int, long, long);

+void	outTsl(Tmesg, int, long);

+void	outTsv(Tmesg, int, vlong);

+void	outTv(Tmesg, vlong);

+void	outstart(Tmesg);

+void	outcopy(int, uchar*);

+void	outshort(int);

+void	outlong(long);

+void	outvlong(vlong);

+void	outsend(void);

--- /dev/null

+++ b/sys/src/cmd/jamterm/scroll.c

@@ -1,0 +1,177 @@

+#include <u.h>

+#include <libc.h>

+#include <draw.h>

+#include <thread.h>

+#include <mouse.h>

+#include <keyboard.h>

+#include <frame.h>

+#include "flayer.h"

+#include "samterm.h"

+

+static Image *scrtmp;

+static Image *scrback;

+

+void

+scrtemps(void)

+{

+	int h;

+

+	if(scrtmp)

+		return;

+	if(screensize(0, &h) == 0)

+		h = 2048;

+	scrtmp = allocimage(display, Rect(0, 0, 32, h), screen->chan, 0, 0);

+	scrback = allocimage(display, Rect(0, 0, 32, h), screen->chan, 0, 0);

+	if(scrtmp==0 || scrback==0)

+		panic("scrtemps");

+}

+

+Rectangle

+scrpos(Rectangle r, long p0, long p1, long tot)

+{

+	Rectangle q;

+	int h;

+

+	q = r;

+	h = q.max.y-q.min.y;

+	if(tot == 0)

+		return q;

+	if(tot > 1024L*1024L)

+		tot>>=10, p0>>=10, p1>>=10;

+	if(p0 > 0)

+		q.min.y += h*p0/tot;

+	if(p1 < tot)

+		q.max.y -= h*(tot-p1)/tot;

+	if(q.max.y < q.min.y+2){

+		if(q.min.y+2 <= r.max.y)

+			q.max.y = q.min.y+2;

+		else

+			q.min.y = q.max.y-2;

+	}

+	return q;

+}

+

+void

+scrmark(Flayer *l, Rectangle r)

+{

+	r.max.x--;

+	if(rectclip(&r, l->scroll)) {

+		if (l->f.b == nil)

+			panic("scrmark: nil l->f.b");

+		draw(l->f.b, r, l->f.cols[HIGH], nil, ZP);

+	}

+}

+

+void

+scrunmark(Flayer *l, Rectangle r)

+{

+	if(rectclip(&r, l->scroll)) {

+		if (l->f.b == nil)

+			panic("scrunmark: nil l->f.b");

+		draw(l->f.b, r, scrback, nil, Pt(0, r.min.y-l->scroll.min.y));

+	}

+}

+

+void

+scrdraw(Flayer *l, long tot)

+{

+	Rectangle r, r1, r2;

+	Image *b;

+

+	scrtemps();

+	if(l->f.b == 0)

+		panic("scrdraw");

+	r = l->scroll;

+	r1 = r;

+	if(l->visible == All){

+		b = scrtmp;

+		r1.min.x = 0;

+		r1.max.x = Dx(r);

+	}else

+		b = l->f.b;

+	r2 = scrpos(r1, l->origin, l->origin+l->f.nchars, tot);

+	if(!eqrect(r2, l->lastsr)){

+		l->lastsr = r2;

+		draw(b, r1, l->f.cols[BORD], nil, ZP);

+		draw(b, r2, l->f.cols[BACK], nil, r2.min);

+		r2 = r1;

+		r2.min.x = r2.max.x-1;

+		draw(b, r2, l->f.cols[BORD], nil, ZP);

+		if(b!=l->f.b)

+			draw(l->f.b, r, b, nil, r1.min);

+	}

+}

+

+void

+scroll(Flayer *l, int but)

+{

+	int in = 0, oin;

+	long tot = scrtotal(l);

+	Rectangle scr, r, s, rt;

+	int x, y, my, oy, h;

+	long p0;

+ 

+	if(l->visible==None)

+		return;

+

+	s = l->scroll;

+	x = s.min.x+FLSCROLLWID/2;

+	scr = scrpos(l->scroll, l->origin, l->origin+l->f.nchars, tot);

+	r = scr;

+	y = scr.min.y;

+	my = mousep->xy.y;

+	draw(scrback, Rect(0,0,Dx(l->scroll), Dy(l->scroll)), l->f.b, nil, l->scroll.min);

+	do{

+		oin = in;

+		in = (but > 3) || (but == 2) || abs(x-mousep->xy.x)<=FLSCROLLWID/2;

+		if(oin && !in)

+			scrunmark(l, r);

+		if(in){

+			scrmark(l, r);

+			oy = y;

+			my = mousep->xy.y;

+			if(my < s.min.y)

+				my = s.min.y;

+			if(my >= s.max.y)

+				my = s.max.y;

+			if(but == 1 || but == 4){

+				p0 = l->origin-frcharofpt(&l->f, Pt(s.max.x, my));

+				rt = scrpos(l->scroll, p0, p0+l->f.nchars, tot);

+				y = rt.min.y;

+			}else if(but == 2){

+				y = my;

+				if(y > s.max.y-2)

+					y = s.max.y-2;

+			}else if(but == 3 || but == 5){

+				p0 = l->origin+frcharofpt(&l->f, Pt(s.max.x, my));

+				rt = scrpos(l->scroll, p0, p0+l->f.nchars, tot);

+				y = rt.min.y;

+			}

+			if(y != oy){

+				scrunmark(l, r);

+				r = rectaddpt(scr, Pt(0, y-scr.min.y));

+				scrmark(l, r);

+			}

+		}

+	}while(but <= 3 && button(but));

+	if(in){

+		h = s.max.y-s.min.y;

+		scrunmark(l, r);

+		p0 = 0;

+		if(but == 1 || but == 4){

+			but = 1;

+			p0 = (long)(my-s.min.y)/l->f.font->height+1;

+		}else if(but == 2){

+			if(tot > 1024L*1024L)

+				p0 = ((tot>>10)*(y-s.min.y)/h)<<10;

+			else

+				p0 = tot*(y-s.min.y)/h;

+		}else if(but == 3 || but == 5){

+			but = 3;

+			p0 = l->origin+frcharofpt(&l->f, Pt(s.max.x, my));

+			if(p0 > tot)

+				p0 = tot;

+		}

+		scrorigin(l, but, p0);

+	}

+}

--- /dev/null

+++ b/sys/src/cmd/jamterm/win.c

@@ -1,0 +1,197 @@

+#include <u.h>

+#include <libc.h>

+#include <draw.h>

+#include <thread.h>

+#include <mouse.h>

+#include <keyboard.h>

+#include <frame.h>

+#include "flayer.h"

+#include "samterm.h"

+

+enum{

+	SnapΔ = 24 * FLMARGIN,

+};

+

+int

+max(int a, int b)

+{

+	return a > b ? a : b;

+}

+

+int

+min(int a, int b)

+{

+	return a < b ? a : b;

+}

+

+Rectangle

+defaultcmdrect(void)

+{

+	int rw, rh, fw, fh;

+	Rectangle r;

+

+	fw = stringwidth(font, "0");

+	fh = font->height;

+	rw = Dx(screen->r) / fw;

+	rh = Dy(screen->r) / fh;

+	r = screen->r;

+	if(rw < 6 || rh < 3){

+		;

+	}else if(rw >= 120){

+		r.min.x = r.max.x - 72 * fw;

+		r.min.y = max(r.max.y - 8 * fh, r.min.y + 2*fh);

+	}else

+		r.max.y = r.min.y + 2*fh + min(max(Dy(screen->r) / 6, 0), 12*fh);

+	return r;

+}

+

+/* always prefer innermost border in case of ties */

+static int

+cansnap(int a, int b, int Δ)

+{

+	int δ;

+

+	return (δ = abs(a - b)) <= Δ && (δ != Δ || a < b);

+}

+

+/* use borders of all rects next to ours as guides to snap to */

+static Rectangle

+snaprect(Rectangle r, Flayer *l)

+{

+	int i;

+	Rectangle Δr, s, rr, c;

+	Flayer *fl;

+	Text *t;

+

+	rr = insetrect(r, -SnapΔ);

+	Δr = Rect(SnapΔ, SnapΔ, SnapΔ, SnapΔ);

+	s = r;

+	for(i=0; i<nname; i++){

+		t = text[i];

+		if(t == nil || t->nwin == 0)

+			continue;

+		for(fl=t->l; fl<t->l+NL; fl++){

+			if(fl->textfn == nil || fl == l)

+				continue;

+			c = fl->entire;

+			if(!rectXrect(rr, c))

+				continue;

+			if(cansnap(r.min.x, c.max.x, Δr.min.x))		/* adjacent border */

+				s.min.x = c.max.x, Δr.min.x = abs(r.min.x - c.max.x);

+			else if(cansnap(r.min.x, c.min.x, Δr.min.x))	/* adjacent guide line */

+				s.min.x = c.min.x, Δr.min.x = abs(r.min.x - c.min.x);

+			if(cansnap(r.min.y, c.max.y, Δr.min.y))

+				s.min.y = c.max.y, Δr.min.y = abs(r.min.y - c.max.y);

+			else if(cansnap(r.min.y, c.min.y, Δr.min.y))

+				s.min.y = c.min.y, Δr.min.y = abs(r.min.y - c.min.y);

+			if(cansnap(c.min.x, r.max.x, Δr.max.x))

+				s.max.x = c.min.x, Δr.max.x = abs(c.min.x - r.max.x);

+			else if(cansnap(c.max.x, r.max.x, Δr.max.x))

+				s.max.x = c.max.x, Δr.max.x = abs(c.max.x - r.max.x);

+			if(cansnap(c.min.y, r.max.y, Δr.max.y))

+				s.max.y = c.min.y, Δr.max.y = abs(c.min.y - r.max.y);

+			else if(cansnap(c.max.y, r.max.y, Δr.max.y))

+				s.max.y = c.max.y, Δr.max.y = abs(c.max.y - r.max.y);

+		}

+	}

+	if(cansnap(r.min.x, screen->r.min.x, Δr.min.x))

+		s.min.x = screen->r.min.x;

+	if(cansnap(r.min.y, screen->r.min.y, Δr.min.y))

+		s.min.y = screen->r.min.y;

+	if(cansnap(screen->r.max.x, r.max.x, Δr.max.x))

+		s.max.x = screen->r.max.x;

+	if(cansnap(screen->r.max.y, r.max.y, Δr.max.y))

+		s.max.y = screen->r.max.y;

+	return s;

+}

+

+/* in case of overlaps, always glob the smallest rect rather than

+ * the biggest to maintain splits and selectable flayers */

+static Rectangle

+stealrect(Point p)

+{

+	int i;

+	Rectangle c, r;

+	Flayer *fl;

+	Text *t;

+

+	r = screen->r;

+	for(i=0; i<nname; i++){

+		t = text[i];

+		if(t == nil || t->nwin == 0)

+			continue;

+		for(fl=t->l; fl<t->l+NL; fl++){

+			if(fl->textfn == nil

+			|| !ptinrect(p, fl->entire))

+				continue;

+			c = fl->entire;

+			if(Dx(c) * Dy(c) < Dx(r) * Dy(r))

+				r = c;

+		}

+	}

+	return r;

+}

+

+static Rectangle

+fillvoid(Point p, Flayer *l, int new)

+{

+	int i;

+	Rectangle c, r;

+	Flayer *fl;

+	Text *t;

+

+	r = screen->r;

+	for(i=0; i<nname; i++){

+		t = text[i];

+		if(t == nil || t->nwin == 0)

+			continue;

+		for(fl=t->l; fl<t->l+NL; fl++){

+			c = fl->entire;

+			if(fl->textfn == nil

+			|| !rectXrect(r, c))

+				continue;

+			if(!new && fl == l)

+				continue;

+			if(ptinrect(p, fl->entire))

+				return ZR;

+			if(c.max.x <= p.x && c.max.x > r.min.x)

+				r.min.x = c.max.x;

+			if(p.x <= c.min.x && c.min.x < r.max.x)

+				r.max.x = c.min.x;

+			if(!rectXrect(c, r))

+				continue;

+			if(c.max.y <= p.y && c.max.y > r.min.y)

+				r.min.y = c.max.y;

+			if(p.y <= c.min.y && c.min.y < r.max.y)

+				r.max.y = c.min.y;

+		}

+		if(Dx(r) < 2*font->width || Dy(r) < font->height)

+			return ZR;

+	}

+	return r;

+}

+

+int

+promptrect(Rectangle *rp, Flayer *l, int new)

+{

+	Point p;

+	Rectangle r;

+

+	r = getrect(3, mousectl);

+	if(eqrect(r, ZR)){

+		*rp = r;

+		return 0;

+	/* around the minimum for libframe to not choke */

+	}else if(Dx(r) < 2 * stringwidth(font, "0") + 2 * FLMARGIN

+	|| Dy(r) < font->height + 2 * FLMARGIN){

+		p = r.min;	/* mousep->xy == r.max */

+		if(!ptinrect(p, screen->r))

+			return 0;

+		r = fillvoid(p, l, new);

+		if(eqrect(r, ZR))

+			r = stealrect(p);

+	}else

+		r = snaprect(r, l);

+	*rp = r;

+	return 1;

+}