shithub: pico

Info  •  Files  •  Log

fork our version of rsc's version of pico

--- a/mkfile

+++ b/mkfile

@@ -1,10 +1,6 @@

 </$objtype/mkfile

-YFILES=pico.y

+YFILES=pixo.y

 OFILES=y.tab.$O

 BIN=$home/bin/$objtype

-TARG=pico

+TARG=pixo

 </sys/src/cmd/mkone

-

-demo:V: doug.pico

-	if(! test -f $O.out) mk $O.out || exit

-	$O.out -q <doug.pico

--- a/pico.y

+++ /dev/null

@@ -1,811 +1,0 @@

-%{

-#include <u.h>

-#include <libc.h>

-#include <ctype.h>

-#include <bio.h>

-#include <draw.h>

-#include <event.h>

-#include <memdraw.h>

-

-char *newname, *cmd, buf[64*1024], *bufp = buf;

-

-int yylex(void);

-int yyparse(void);

-void yyerror(char*);

-

-void checkref(char*);

-void checkrefn(int);

-

-char *

-sym(char *fmt, ...)

-{

-	va_list args;

-	char *s;

-

-	s = bufp;

-	va_start(args, fmt);

-	bufp = vseprint(s, buf+sizeof buf, fmt, args);

-	va_end(args);

-	if(bufp >= buf + sizeof(buf) - 1)

-		sysfatal("NOPE NOPE NOPE");

-	*bufp++ = 0;

-	return s;

-}

-

-%}

-

-%union

-{

-	char* s;

-	int i;

-	double d;

-}

-

-%token NAME NEW OLD NUM DBL EOF ERROR

-%token <s> FN NAME

-%type <s> index zindex newname command expr fileref value

-%type <i> NUM

-%type <d> DBL

-

-%right '='

-%right '?' ':'

-%left OR

-%left AND

-%left '|'

-%left '^'

-%left '&'

-%left EQ NE

-%right LSH RSH

-%left '<' '>' LE GE

-%left '+' '-'

-%left '*' '/' '%'

-%right POW

-%right '!'

-

-%%

-

-start: command EOF { cmd = $1; bufp = buf; return 0; }

-

-index:

-	'[' expr ',' expr ',' expr ']'  { $$ = sym("%s,%s,%s", $2, $4, $6); }

-

-zindex:

-	index

-|	{ $$ = "x,y,z"; }

-

-newname:

-	NEW { $$ = "new"; }

-|	NEW NAME { $$ = $2; }

-|	NAME { $$ = $1; }

-

-command:

-	newname zindex '=' expr  

-	{ newname = $1; $$ = sym("T = %s; *WIMAGE(%s, %s) = CLIP(T);", $4, $1, $2); }

-|	expr

-	{ newname = "new"; $$ = sym("T = %s; *WIMAGE(new, x,y,z) = CLIP(T);", $1); }

-

-expr:

-	value

-|	fileref

-|	'x' { $$ = "x"; }

-|	'y' { $$ = "y"; }

-|	'z' { $$ = "z"; }

-|	'X' { $$ = "X"; }

-|	'Y' { $$ = "Y"; }

-|	'Z' { $$ = "Z"; }

-|	"(" expr ")" { $$ = $2; }

-|	FN "(" expr ")" { $$ = sym("%s(%s)", $1, $3); }

-|	'-' expr %prec '!'  { $$ = sym("-(%s)", $2); }

-|	'!' expr { $$ = sym("!(%s)", $2); }

-|	expr '+' expr { $$ = sym("(%s)+(%s)", $1, $3); }

-|	expr '-' expr { $$ = sym("(%s)-(%s)", $1, $3); }

-|	expr '*' expr { $$ = sym("(%s)*(%s)", $1, $3); }

-|	expr '/' expr { $$ = sym("DIV(%s, %s)", $1, $3); }

-|	expr '%' expr { $$ = sym("MOD(%s, %s)", $1, $3); }

-|	expr '<' expr { $$ = sym("(%s) < (%s)", $1, $3); }

-|	expr '>' expr { $$ = sym("(%s) > (%s)", $1, $3); }

-|	expr LE expr { $$ = sym("(%s) <= (%s)", $1, $3); }

-|	expr GE expr { $$ = sym("(%s) >= (%s)", $1, $3); }

-|	expr EQ expr { $$ = sym("(%s) == (%s)", $1, $3); }

-|	expr NE expr { $$ = sym("(%s) != (%s)", $1, $3); }

-|	expr LSH expr { $$ = sym("(%s) << (%s)", $1, $3); }

-|	expr RSH expr { $$ = sym("(%s) >> (%s)", $1, $3); }

-|	expr '^' expr { $$ = sym("(%s) ^ (%s)", $1, $3); }

-|	expr '&' expr { $$ = sym("(%s) & (%s)", $1, $3); }

-|	expr '|' expr { $$ = sym("(%s) | (%s)", $1, $3); }

-|	expr AND expr { $$ = sym("(%s) && (%s)", $1, $3); }

-|	expr OR expr { $$ = sym("(%s) || (%s)", $1, $3); }

-|	expr '?' expr ':' expr { $$ = sym("(%s) ? (%s) : (%s)", $1, $3, $5); }

-|	expr POW expr { $$ = sym("POW(%s, %s)", $1, $3); }

-

-fileref:

-	NAME zindex { checkref($1); $$ = sym("IMAGE(%s, %s)", $1, $2); }

-|	"$" NUM zindex { checkrefn($2); $$ = sym("IMAGE(OLD[%d-1], %s)", $2, $3); }

-|	OLD zindex { checkrefn(1); $$ = sym("IMAGE(old, %s)", $2); }

-

-value:

-	NUM { $$ = sym("%d", $1); }

-|	DBL { $$ = sym("%f", $1); }

-

-%%

-

-char *inp;

-

-jmp_buf boomer;

-

-void

-kaboom(char *fmt, ...)

-{

-	va_list arg;

-	va_start(arg, fmt);

-	vfprint(2, fmt, arg);

-	va_end(arg);

-	fprint(2, "\n");

-	longjmp(boomer, 1);

-}

-

-void

-yyerror(char *msg)

-{

-	kaboom("%s", msg);

-}

-

-int

-isnum(Rune r, char *s, char *p)

-{

-	if(isdigit(r)

-	|| p - s == 1 && (r == 'x' || r == 'X')

-	|| p - s > 2 && (s[1] == 'x' || s[1] == 'X') && (r >= 'a' && r <= 'f' || r >= 'A' && r <= 'F'))

-		return 1;

-	else if(r == '.')

-		return 2;

-	else

-		return 0;

-}

-

-int

-getnum(Rune r)

-{

-	int n, x, dbl;

-	char s[128], *p;

-

-	for(p=s, n=0, dbl=0; x = isnum(r, s, p); n=chartorune(&r, inp), inp+=n){

-		if(p < s+sizeof(s)-1){

-			*p++ = (char)r;

-			if(x == 2)

-				dbl = 1;

-		}

-	}

-	*p = 0;

-	inp -= n;

-	if(dbl){

-		yylval.d = strtod(s, nil);

-		return DBL;

-	}else{

-		yylval.i = strtol(s, nil, 0);

-		return NUM;

-	}

-}

-

-int

-getname(Rune r)

-{

-	int n;

-	Rune s[128], *p;

-

-	for(p=s, n=0; isalpharune(r) || isdigitrune(r) || r >= 0x2080 && r <= 0x2089; n=chartorune(&r, inp), inp+=n)

-		if(p < s+nelem(s)-1)

-			*p++ = r;

-	*p = 0;

-	inp -= n;

-	if(runestrcmp(s, L"x") == 0

-	|| runestrcmp(s, L"X") == 0

-	|| runestrcmp(s, L"y") == 0

-	|| runestrcmp(s, L"Y") == 0

-	|| runestrcmp(s, L"z") == 0

-	|| runestrcmp(s, L"Z") == 0)

-		return s[0];

-	yylval.s = sym("%S", s);

-	if(runestrcmp(s, L"new") == 0)

-		return NEW;

-	else if(runestrcmp(s, L"log") == 0

-	|| runestrcmp(s, L"sin") == 0

-	|| runestrcmp(s, L"cos") == 0

-	|| runestrcmp(s, L"sqrt") == 0)

-		return FN;

-	return NAME;

-}

-

-int

-follow2(Rune r0, Rune r1, int op1, Rune r2, int op2)

-{

-	int n;

-	Rune r;

-

-	if(*inp == 0)

-		return 0;

-	n = chartorune(&r, inp);

-	if(r == r1){

-		inp += n;

-		return op1;

-	}else if(r == r2){

-		inp += n;

-		return op2;

-	}

-	return r0;

-}

-

-int

-follow(Rune r0, Rune rr, int op)

-{

-	int n;

-	Rune r;

-

-	if(*inp == 0)

-		return 0;

-	n = chartorune(&r, inp);

-	if(r == rr){

-		inp += n;

-		return op;

-	}

-	return r0;

-}

-

-int 

-yylex(void)

-{

-	Rune r;

-

-	for(;;){

-		if(*inp == 0)

-			return EOF;

-		inp += chartorune(&r, inp);

-		if(!isspacerune(r))

-			break;

-	}

-	switch(r){

-	case '+':

-	case '-':

-	case '/':

-	case '%':

-	case '?':

-	case ':':

-	case '^':

-	case '$':

-	case '[':

-	case ']':

-	case ',':

-	case '(':

-	case ')': return r;

-	case '&': return follow(r, '&', AND);

-	case '|': return follow(r, '|', OR);

-	case '*': return follow(r, '*', POW);

-	case '<': return follow2(r, '=', LE, '<', LSH);

-	case '>': return follow2(r, '=', GE, '>', RSH);

-	case '=': return follow(r, '=', EQ);

-	case '!': return follow(r, '=', NE);

-	}

-	if(isdigit(r))

-		return getnum(r);

-	else if(isalpharune(r))

-		return getname(r);

-	kaboom("unexpected %C", r);

-	return ERROR;

-}

-

-int

-system(char *s)

-{

-	int pid;

-	

-	pid = fork();

-	if(pid == 0){

-		execl("/bin/rc", "rc", "-c", s, nil);

-		_exits(0);

-	}

-	if(pid == -1){

-		fprint(2, "fork: %r\n");

-		return -1;

-	}

-	Waitmsg *w;

-	while((w = wait()) != nil && w->pid != pid)

-		;

-	if(w == nil){

-		fprint(2, "%s: wait not found\n", s);

-		return -1;

-	}

-	if(w->msg && w->msg[0]) {

-		fprint(2, "%s: failed\n", s);

-		free(w);

-		return -1;

-	}

-	free(w);

-	return 0;

-}

-

-void show(Memimage*);

-

-void

-xquit(int, char **)

-{

-	exits(0);

-}

-

-typedef struct File File;

-struct File{

-	char *name;

-	char *path;

-	Memimage *m;

-	int ref;

-	int fd;

-};

-File *files;

-int nfiles;

-

-int DX = 248, DY = 248;

-

-Memimage*

-readi(char *name)

-{

-	int fd;

-	Memimage *m, *m1;

-

-	if((fd = open(name, OREAD)) < 0){

-		fprint(2, "open %s: %r\n", name);

-		return nil;

-	}

-	m = readmemimage(fd);

-	close(fd);

-	if(m == nil){

-		fprint(2, "readmemimage: %r\n");

-		return nil;

-	}

-	if(m->chan != ABGR32){

-		m1 = allocmemimage(m->r, ABGR32);

-		memfillcolor(m1, DBlack);

-		memimagedraw(m1, m1->r, m, m->r.min, memopaque, ZP, S);

-		freememimage(m);

-		m = m1;

-	}

-	return m;

-}

-

-int

-writei(Memimage *m, char *name, int tmp)

-{

-	int fd;

-	

-	if((fd = create(name, OWRITE|(tmp?ORCLOSE:0), 0666)) < 0){

-		fprint(2, "create %s: %r\n", name);

-		return -1;

-	}

-	if(writememimage(fd, m) < 0){

-		close(fd);

-		fprint(2, "writememimage %s: %r\n", name);

-		return -1;

-	}

-	if(tmp)

-		return fd;

-	close(fd);

-	return 0;

-}

-

-Memimage*

-namei(char *name, int warn)

-{

-	int i;

-

-	for(i=0; i<nfiles; i++)

-		if(strcmp(name, files[i].name) == 0){

-			files[i].ref++;

-			return files[i].m;

-		}

-	if(warn)

-		fprint(2, "no image %s\n", name);

-	return nil;

-}

-

-void

-iput(char *name, Memimage *m, char *path)

-{

-	int i;

-

-	for(i=0; i<nfiles; i++)

-		if(name[0] && strcmp(name, files[i].name) == 0){

-			freememimage(files[i].m);

-			files[i].m = m;

-			return;

-		}

-	files = realloc(files, ++nfiles*sizeof files[0]);

-	if(strlen(name) == 0)

-		files[i].name = smprint("$%d", i+1);

-	else

-		files[i].name = strdup(name);

-	files[i].path = path == nil ? nil : strdup(path);

-	files[i].m = m;

-	files[i].fd = writei(files[i].m, sym("/tmp/pico-run.%d.bit", i), 1);

-	DX = Dx(m->r);

-	DY = Dy(m->r);

-}

-

-void

-checkref(char *name)

-{

-	if(namei(name, 1) == nil)

-		longjmp(boomer, 1);

-}

-

-void

-checkrefn(int n)

-{

-	if(n < 1 || n > nfiles)

-		kaboom("no image $%d", n);

-	files[n-1].ref++;

-}

-

-void

-xfiles(int argc, char **)

-{

-	int i;

-	if(argc != 1){

-		fprint(2, "usage: f\n");

-		return;

-	}

-	for(i=0; i<nfiles; i++)

-		print("$%d %s %s %dx%d\n", i+1, files[i].name, files[i].path ? files[i].path : "", Dx(files[i].m->r), Dy(files[i].m->r));

-}

-

-void

-xread(int argc, char **argv)

-{

-	Memimage *m;

-

-	if(argc < 2 || argc > 3){

-		fprint(2, "usage: r image [filename]\n");

-		return;

-	}

-	m = readi(argc == 3 ? argv[2] : argv[1]);

-	if(m != nil)

-		iput(argv[1], m, argc == 3 ? argv[2] : argv[1]);

-}

-

-void

-xwrite(int argc, char **argv)

-{

-	if(argc < 2 || argc > 3){

-		fprint(2, "usage: w image [filename]\n");

-		return;

-	}

-	Memimage *m = namei(argv[1], 1);

-	if(m == nil)

-		return;

-	writei(m, argc == 3 ? argv[2] : argv[1], 0);

-}

-

-void

-xdisplay(int argc, char **argv)

-{

-	int i;

-

-	if(argc == 1){

-		if(nfiles > 0)

-			show(files[nfiles-1].m);

-		return;

-	}

-	

-	for(i=1; i<argc; i++){

-		Memimage *m = namei(argv[i], 1);

-		if(m)

-			show(m);

-	}

-}

-

-char* prolog = 

-	"#include <u.h>\n"

-	"#include <libc.h>\n"

-	"#include <draw.h>\n"

-	"#include <memdraw.h>\n"

-	"\n"

-	"Memimage*\n"

-	"READ(char *file)\n"

-	"{\n"

-	"	Memimage *m;\n"

-	"	int fd = open(file, OREAD);\n"

-	"	if(fd < 0) sysfatal(\"open %s: %r\", file);\n"

-	"	m = readmemimage(fd);\n"

-	"	if(m == nil) sysfatal(\"readmemimage %s: %r\", file);\n"

-	"	return m;\n"

-	"}\n\n"

-	"void\n"

-	"WRITE(Memimage *m, char *file)\n"

-	"{\n"

-	"	int fd = create(file, OWRITE, 0666);\n"

-	"	if(fd < 0) sysfatal(\"create %s: %r\", file);\n"

-	"	if(writememimage(fd, m) < 0) sysfatal(\"writememimage %s: %r\", file);\n"

-	"}\n\n"

-	"int\n"

-	"POW(int a, int b)\n"

-	"{\n"

-	"	int t;\n"

-	"	if(b <= 0) return 1;\n"

-	"	if(b == 1) return a;\n"

-	"	t = POW(a, b/2);\n"

-	"	t *= t;\n"

-	"	if(b%2) t *= a;\n"

-	"	return t;\n"

-	"}\n"

-	"\n"

-	"int\n"

-	"DIV(int a, int b)\n"

-	"{\n"

-	"	if(b == 0) return 0;\n"

-	"	return a/b;\n"

-	"}\n"

-	"\n"

-	"int\n"

-	"MOD(int a, int b)\n"

-	"{\n"

-	"	if(b == 0) return 0;\n"

-	"	return a%b;\n"

-	"}\n"

-	"\n"

-	"#define Z 255\n"

-	"\n"

-	"uchar\n"

-	"IMAGE(Memimage *m, int x, int y, int z)\n"

-	"{\n"

-	"	if(x < 0 || y < 0 || z < 0 || x >= Dx(m->r) || y >= Dy(m->r) || z > 3) return 0;\n"

-	"	return byteaddr(m, addpt(m->r.min, Pt(x,y)))[z];\n"

-	"}\n"

-	"\n"

-	"uchar*\n"

-	"WIMAGE(Memimage *m, int x, int y, int z)\n"

-	"{\n"

-	"	static uchar devnull;\n"

-	"	if(x < 0 || y < 0 || z < 0 || x >= Dx(m->r) || y >= Dy(m->r) || z > 3) return &devnull;\n"

-	"	return byteaddr(m, addpt(m->r.min, Pt(x,y))) + z;\n"

-	"}\n"

-	"\n"

-	"#define CLIP(x) ((x) < 0 ? 0 : (x) > 255 ? 255 : (x))\n"

-	"\n"

-	"void main(void) {\n"

-	"	int x, y, z, T;\n"

-	;

-

-int quiet;

-

-void

-runprog(char *name, char *cmd)

-{

-	int i, fd, isnew;

-	Memimage *m;

-

-	if((fd = create("/tmp/pico-run.c", OWRITE, 0666)) < 0){

-		fprint(2, "create /tmp/pico-run.c: %r");

-		return;

-	}

-

-	write(fd, prolog, strlen(prolog));

-	fprint(fd, "\tint X = %d, Y = %d;\n", DX, DY);

-	fprint(fd, "\tMemimage *old, *OLD[%d+1];\n", nfiles);

-

-	isnew = namei(name, 0) == nil;

-	if(isnew){

-		fprint(fd, "\tMemimage *new = allocmemimage(Rect(0, 0, X, Y), ABGR32);\n");

-		fprint(fd, "\tif(new == nil) sysfatal(\"allocmemimage: %%r\");\n");

-		if(strcmp(name, "new") != 0)

-			fprint(fd, "\tMemimage *%s = new;\n", name);

-	}

-

-	for(i=0; i<nfiles; i++){

-		if(!files[i].ref)

-			continue;

-		fprint(fd, "\tOLD[%d] = old = READ(\"/tmp/pico-run.%d.bit\");\n", i, i);

-		if(files[i].name[0] != '$'){

-			fprint(fd, "\tMemimage *%s = old;\n", files[i].name);

-			if(strcmp(files[i].name, name) == 0)

-				fprint(fd, "Memimage* new = %s;\n", files[i].name);

-		}

-	}

-

-	fprint(fd, "\tfor(z=0; z<4; z++) for(y=0; y<Y; y++) for(x=0; x<X; x++) {\n");

-	fprint(fd, "\t\t%s\n", cmd);

-	fprint(fd, "\t}");

-	fprint(fd, "\tWRITE(new, \"/tmp/pico-run.out.bit\");\n");

-	fprint(fd, "\texits(0);\n}\n");

-	close(fd);

-

-	if(access("/tmp/pico-run.mk", AEXIST) < 0){

-		if((fd = create("/tmp/pico-run.mk", OWRITE|ORCLOSE, 0666)) < 0){

-			fprint(2, "create /tmp/pico-run.mk: %r");

-			goto cleanup;

-		}

-		fprint(fd, "</$objtype/mkfile\n"

-			"/tmp/pico-run:Q: /tmp/pico-run.c\n"

-			"\t$CC -o /tmp/pico-run.$O /tmp/pico-run.c\n"

-			"\t$LD -o $target /tmp/pico-run.$O\n"

-			"\t$target\n"

-			"\trm -f /tmp/pico-run.$O\n");

-	}

-	if(system("mk -f /tmp/pico-run.mk /tmp/pico-run") < 0)

-		goto cleanup;

-

-	m = readi("/tmp/pico-run.out.bit");

-	if(m){

-		if(strcmp(name, "new") != 0)

-			iput(name, m, nil);

-		else

-			iput("", m, nil);

-		if(!quiet)

-			show(m);

-	}

-

-	remove("/tmp/pico-run.c");

-cleanup:

-	remove("/tmp/pico-run");

-	remove("/tmp/pico-run.out.bit");

-	for(i=0; i<nfiles; i++)

-		files[i].ref = 0;

-}

-

-struct {

-	char *s;

-	void (*f)(int, char**);

-} cmds[] = {

-	"d", xdisplay,

-	"f", xfiles,

-	"q", xquit,

-	"r", xread,

-	"w", xwrite,

-};

-

-void

-main(int argc, char **argv)

-{

-	Biobuf b;

-	char *p, *f[10];

-	int nf;

-	int i, l;

-

-	ARGBEGIN{

-	case 'q':

-		quiet = 1;

-		break;

-	}ARGEND

-

-	if(memimageinit() < 0)

-		sysfatal("memimageinit: %r");

-	Binit(&b, 0, OREAD);

-	setjmp(boomer);

-	for(;;){

-	reread:

-		if(!quiet)

-			fprint(2, "-> ");

-		if((p = Brdline(&b, '\n')) == 0)

-			break;

-		p[Blinelen(&b)-1] = 0;

-		while(*p != 0 && isspace(*p))

-			p++;

-		if(*p == 0)

-			goto reread;

-		for(i=0; i<nelem(cmds); i++){

-			l = strlen(cmds[i].s);

-			if(strncmp(p, cmds[i].s, l) == 0 && (p[l] == 0 || isspace(p[l]))){

-				nf = tokenize(p, f, nelem(f));

-				cmds[i].f(nf, f);

-				goto reread;

-			}

-		}

-		

-		inp = p;

-		newname = nil;

-		cmd = nil;

-		yyparse();

-		runprog(newname, cmd);

-	}

-	exits(0);	

-}

-

-int

-newwin(void)

-{

-	char *srv;

-	char spec[100];

-	int srvfd, pid;

-

-	rfork(RFNAMEG);

-

-	srv = getenv("wsys");

-	if(srv == 0){

-		fprint(2, "no graphics: $wsys not set\n");

-		return -1;

-	}

-	srvfd = open(srv, ORDWR);

-	free(srv);

-	if(srvfd == -1){

-		fprint(2, "no graphics: can't open %s: %r\n", srv);

-		return -1;

-	}

-

-	sprint(spec, "new -dx %d -dy %d -pid 0", DX+8 < 100 ? 100 : DX+8, DY+8 < 48 ? 48 : DY+8);

-	if(mount(srvfd, -1, "/mnt/wsys", 0, spec) == -1){

-		fprint(2, "no graphics: mount /mnt/wsys: %r (spec=%s)\n", spec);

-		return -1;

-	}

-	close(srvfd);

-

-	switch(pid = rfork(RFFDG|RFPROC|RFNAMEG|RFENVG|RFNOTEG|RFNOWAIT)){

-	case -1:

-		fprint(2, "no graphics: can't fork: %r\n");

-		break;

-	}

-	if(pid == 0)

-		bind("/mnt/wsys", "/dev", MBEFORE);

-	else

-		unmount(nil, "/mnt/wsys");

-	return pid;

-}

-

-Image *displayed;

-

-void

-eresized(int new)

-{

-	if(new && getwindow(display, Refnone) < 0)

-		fprint(2,"can't reattach to window");

-	draw(screen, screen->r, displayed, nil, displayed->r.min);

-	flushimage(display, 1);

-}

-

-void

-showloop(Memimage *m)

-{

-	Rectangle r;

-

-	if(initdraw(0, 0, "pico") < 0){

-		fprint(2, "initdraw: %r\n");

-		return;

-	}

-	einit(Emouse|Ekeyboard);

-	if((displayed = allocimage(display, m->r, m->chan, 0, DNofill)) == nil){

-		fprint(2, "allocimage: %r\n");

-		return;

-	}

-	r = displayed->r;

-	while(r.min.y < displayed->r.max.y){

-		r.max.y = r.min.y + 1;

-		if(loadimage(displayed, r, byteaddr(m, r.min), Dx(r)*m->depth/8) < 0){

-			fprint(2, "loadimage: %r\n");

-			return;

-		}

-		r.min.y++;

-	}

-	close(0);

-	eresized(0);

-	for(;;){

-		Event e;

-		flushimage(display, 0);

-		switch(eread(Emouse|Ekeyboard, &e)){

-		case Ekeyboard:

-			if(e.kbdc == 'q')

-				return;

-			eresized(0);

-			break;

-		case Emouse:

-			if(e.mouse.buttons&4)

-				return;

-			break;

-		}

-	}

-}

-

-void

-show(Memimage *m)

-{

-	DX = Dx(m->r);

-	DY = Dy(m->r);

-	if(newwin() != 0)

-		return;

-	showloop(m);

-	exits(0);

-}

--- /dev/null

+++ b/pixo.y

@@ -1,0 +1,811 @@

+%{

+#include <u.h>

+#include <libc.h>

+#include <ctype.h>

+#include <bio.h>

+#include <draw.h>

+#include <event.h>

+#include <memdraw.h>

+

+char *newname, *cmd, buf[64*1024], *bufp = buf;

+

+int yylex(void);

+int yyparse(void);

+void yyerror(char*);

+

+void checkref(char*);

+void checkrefn(int);

+

+char *

+sym(char *fmt, ...)

+{

+	va_list args;

+	char *s;

+

+	s = bufp;

+	va_start(args, fmt);

+	bufp = vseprint(s, buf+sizeof buf, fmt, args);

+	va_end(args);

+	if(bufp >= buf + sizeof(buf) - 1)

+		sysfatal("NOPE NOPE NOPE");

+	*bufp++ = 0;

+	return s;

+}

+

+%}

+

+%union

+{

+	char* s;

+	int i;

+	double d;

+}

+

+%token NAME NEW OLD NUM DBL EOF ERROR

+%token <s> FN NAME

+%type <s> index zindex newname command expr fileref value

+%type <i> NUM

+%type <d> DBL

+

+%right '='

+%right '?' ':'

+%left OR

+%left AND

+%left '|'

+%left '^'

+%left '&'

+%left EQ NE

+%right LSH RSH

+%left '<' '>' LE GE

+%left '+' '-'

+%left '*' '/' '%'

+%right POW

+%right '!'

+

+%%

+

+start: command EOF { cmd = $1; bufp = buf; return 0; }

+

+index:

+	'[' expr ',' expr ',' expr ']'  { $$ = sym("%s,%s,%s", $2, $4, $6); }

+

+zindex:

+	index

+|	{ $$ = "x,y,z"; }

+

+newname:

+	NEW { $$ = "new"; }

+|	NEW NAME { $$ = $2; }

+|	NAME { $$ = $1; }

+

+command:

+	newname zindex '=' expr  

+	{ newname = $1; $$ = sym("T = %s; *WIMAGE(%s, %s) = CLIP(T);", $4, $1, $2); }

+|	expr

+	{ newname = "new"; $$ = sym("T = %s; *WIMAGE(new, x,y,z) = CLIP(T);", $1); }

+

+expr:

+	value

+|	fileref

+|	'x' { $$ = "x"; }

+|	'y' { $$ = "y"; }

+|	'z' { $$ = "z"; }

+|	'X' { $$ = "X"; }

+|	'Y' { $$ = "Y"; }

+|	'Z' { $$ = "Z"; }

+|	"(" expr ")" { $$ = $2; }

+|	FN "(" expr ")" { $$ = sym("%s(%s)", $1, $3); }

+|	'-' expr %prec '!'  { $$ = sym("-(%s)", $2); }

+|	'!' expr { $$ = sym("!(%s)", $2); }

+|	expr '+' expr { $$ = sym("(%s)+(%s)", $1, $3); }

+|	expr '-' expr { $$ = sym("(%s)-(%s)", $1, $3); }

+|	expr '*' expr { $$ = sym("(%s)*(%s)", $1, $3); }

+|	expr '/' expr { $$ = sym("DIV(%s, %s)", $1, $3); }

+|	expr '%' expr { $$ = sym("MOD(%s, %s)", $1, $3); }

+|	expr '<' expr { $$ = sym("(%s) < (%s)", $1, $3); }

+|	expr '>' expr { $$ = sym("(%s) > (%s)", $1, $3); }

+|	expr LE expr { $$ = sym("(%s) <= (%s)", $1, $3); }

+|	expr GE expr { $$ = sym("(%s) >= (%s)", $1, $3); }

+|	expr EQ expr { $$ = sym("(%s) == (%s)", $1, $3); }

+|	expr NE expr { $$ = sym("(%s) != (%s)", $1, $3); }

+|	expr LSH expr { $$ = sym("(%s) << (%s)", $1, $3); }

+|	expr RSH expr { $$ = sym("(%s) >> (%s)", $1, $3); }

+|	expr '^' expr { $$ = sym("(%s) ^ (%s)", $1, $3); }

+|	expr '&' expr { $$ = sym("(%s) & (%s)", $1, $3); }

+|	expr '|' expr { $$ = sym("(%s) | (%s)", $1, $3); }

+|	expr AND expr { $$ = sym("(%s) && (%s)", $1, $3); }

+|	expr OR expr { $$ = sym("(%s) || (%s)", $1, $3); }

+|	expr '?' expr ':' expr { $$ = sym("(%s) ? (%s) : (%s)", $1, $3, $5); }

+|	expr POW expr { $$ = sym("POW(%s, %s)", $1, $3); }

+

+fileref:

+	NAME zindex { checkref($1); $$ = sym("IMAGE(%s, %s)", $1, $2); }

+|	"$" NUM zindex { checkrefn($2); $$ = sym("IMAGE(OLD[%d-1], %s)", $2, $3); }

+|	OLD zindex { checkrefn(1); $$ = sym("IMAGE(old, %s)", $2); }

+

+value:

+	NUM { $$ = sym("%d", $1); }

+|	DBL { $$ = sym("%f", $1); }

+

+%%

+

+char *inp;

+

+jmp_buf boomer;

+

+void

+kaboom(char *fmt, ...)

+{

+	va_list arg;

+	va_start(arg, fmt);

+	vfprint(2, fmt, arg);

+	va_end(arg);

+	fprint(2, "\n");

+	longjmp(boomer, 1);

+}

+

+void

+yyerror(char *msg)

+{

+	kaboom("%s", msg);

+}

+

+int

+isnum(Rune r, char *s, char *p)

+{

+	if(isdigit(r)

+	|| p - s == 1 && (r == 'x' || r == 'X')

+	|| p - s > 2 && (s[1] == 'x' || s[1] == 'X') && (r >= 'a' && r <= 'f' || r >= 'A' && r <= 'F'))

+		return 1;

+	else if(r == '.')

+		return 2;

+	else

+		return 0;

+}

+

+int

+getnum(Rune r)

+{

+	int n, x, dbl;

+	char s[128], *p;

+

+	for(p=s, n=0, dbl=0; x = isnum(r, s, p); n=chartorune(&r, inp), inp+=n){

+		if(p < s+sizeof(s)-1){

+			*p++ = (char)r;

+			if(x == 2)

+				dbl = 1;

+		}

+	}

+	*p = 0;

+	inp -= n;

+	if(dbl){

+		yylval.d = strtod(s, nil);

+		return DBL;

+	}else{

+		yylval.i = strtol(s, nil, 0);

+		return NUM;

+	}

+}

+

+int

+getname(Rune r)

+{

+	int n;

+	Rune s[128], *p;

+

+	for(p=s, n=0; isalpharune(r) || isdigitrune(r) || r >= 0x2080 && r <= 0x2089; n=chartorune(&r, inp), inp+=n)

+		if(p < s+nelem(s)-1)

+			*p++ = r;

+	*p = 0;

+	inp -= n;

+	if(runestrcmp(s, L"x") == 0

+	|| runestrcmp(s, L"X") == 0

+	|| runestrcmp(s, L"y") == 0

+	|| runestrcmp(s, L"Y") == 0

+	|| runestrcmp(s, L"z") == 0

+	|| runestrcmp(s, L"Z") == 0)

+		return s[0];

+	yylval.s = sym("%S", s);

+	if(runestrcmp(s, L"new") == 0)

+		return NEW;

+	else if(runestrcmp(s, L"log") == 0

+	|| runestrcmp(s, L"sin") == 0

+	|| runestrcmp(s, L"cos") == 0

+	|| runestrcmp(s, L"sqrt") == 0)

+		return FN;

+	return NAME;

+}

+

+int

+follow2(Rune r0, Rune r1, int op1, Rune r2, int op2)

+{

+	int n;

+	Rune r;

+

+	if(*inp == 0)

+		return 0;

+	n = chartorune(&r, inp);

+	if(r == r1){

+		inp += n;

+		return op1;

+	}else if(r == r2){

+		inp += n;

+		return op2;

+	}

+	return r0;

+}

+

+int

+follow(Rune r0, Rune rr, int op)

+{

+	int n;

+	Rune r;

+

+	if(*inp == 0)

+		return 0;

+	n = chartorune(&r, inp);

+	if(r == rr){

+		inp += n;

+		return op;

+	}

+	return r0;

+}

+

+int 

+yylex(void)

+{

+	Rune r;

+

+	for(;;){

+		if(*inp == 0)

+			return EOF;

+		inp += chartorune(&r, inp);

+		if(!isspacerune(r))

+			break;

+	}

+	switch(r){

+	case '+':

+	case '-':

+	case '/':

+	case '%':

+	case '?':

+	case ':':

+	case '^':

+	case '$':

+	case '[':

+	case ']':

+	case ',':

+	case '(':

+	case ')': return r;

+	case '&': return follow(r, '&', AND);

+	case '|': return follow(r, '|', OR);

+	case '*': return follow(r, '*', POW);

+	case '<': return follow2(r, '=', LE, '<', LSH);

+	case '>': return follow2(r, '=', GE, '>', RSH);

+	case '=': return follow(r, '=', EQ);

+	case '!': return follow(r, '=', NE);

+	}

+	if(isdigit(r))

+		return getnum(r);

+	else if(isalpharune(r))

+		return getname(r);

+	kaboom("unexpected %C", r);

+	return ERROR;

+}

+

+int

+system(char *s)

+{

+	int pid;

+	

+	pid = fork();

+	if(pid == 0){

+		execl("/bin/rc", "rc", "-c", s, nil);

+		_exits(0);

+	}

+	if(pid == -1){

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

+		return -1;

+	}

+	Waitmsg *w;

+	while((w = wait()) != nil && w->pid != pid)

+		;

+	if(w == nil){

+		fprint(2, "%s: wait not found\n", s);

+		return -1;

+	}

+	if(w->msg && w->msg[0]) {

+		fprint(2, "%s: failed\n", s);

+		free(w);

+		return -1;

+	}

+	free(w);

+	return 0;

+}

+

+void show(Memimage*);

+

+void

+xquit(int, char **)

+{

+	exits(0);

+}

+

+typedef struct File File;

+struct File{

+	char *name;

+	char *path;

+	Memimage *m;

+	int ref;

+	int fd;

+};

+File *files;

+int nfiles;

+

+int DX = 248, DY = 248;

+

+Memimage*

+readi(char *name)

+{

+	int fd;

+	Memimage *m, *m1;

+

+	if((fd = open(name, OREAD)) < 0){

+		fprint(2, "open %s: %r\n", name);

+		return nil;

+	}

+	m = readmemimage(fd);

+	close(fd);

+	if(m == nil){

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

+		return nil;

+	}

+	if(m->chan != ABGR32){

+		m1 = allocmemimage(m->r, ABGR32);

+		memfillcolor(m1, DBlack);

+		memimagedraw(m1, m1->r, m, m->r.min, memopaque, ZP, S);

+		freememimage(m);

+		m = m1;

+	}

+	return m;

+}

+

+int

+writei(Memimage *m, char *name, int tmp)

+{

+	int fd;

+	

+	if((fd = create(name, OWRITE|(tmp?ORCLOSE:0), 0666)) < 0){

+		fprint(2, "create %s: %r\n", name);

+		return -1;

+	}

+	if(writememimage(fd, m) < 0){

+		close(fd);

+		fprint(2, "writememimage %s: %r\n", name);

+		return -1;

+	}

+	if(tmp)

+		return fd;

+	close(fd);

+	return 0;

+}

+

+Memimage*

+namei(char *name, int warn)

+{

+	int i;

+

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

+		if(strcmp(name, files[i].name) == 0){

+			files[i].ref++;

+			return files[i].m;

+		}

+	if(warn)

+		fprint(2, "no image %s\n", name);

+	return nil;

+}

+

+void

+iput(char *name, Memimage *m, char *path)

+{

+	int i;

+

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

+		if(name[0] && strcmp(name, files[i].name) == 0){

+			freememimage(files[i].m);

+			files[i].m = m;

+			return;

+		}

+	files = realloc(files, ++nfiles*sizeof files[0]);

+	if(strlen(name) == 0)

+		files[i].name = smprint("$%d", i+1);

+	else

+		files[i].name = strdup(name);

+	files[i].path = path == nil ? nil : strdup(path);

+	files[i].m = m;

+	files[i].fd = writei(files[i].m, sym("/tmp/pico-run.%d.bit", i), 1);

+	DX = Dx(m->r);

+	DY = Dy(m->r);

+}

+

+void

+checkref(char *name)

+{

+	if(namei(name, 1) == nil)

+		longjmp(boomer, 1);

+}

+

+void

+checkrefn(int n)

+{

+	if(n < 1 || n > nfiles)

+		kaboom("no image $%d", n);

+	files[n-1].ref++;

+}

+

+void

+xfiles(int argc, char **)

+{

+	int i;

+	if(argc != 1){

+		fprint(2, "usage: f\n");

+		return;

+	}

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

+		print("$%d %s %s %dx%d\n", i+1, files[i].name, files[i].path ? files[i].path : "", Dx(files[i].m->r), Dy(files[i].m->r));

+}

+

+void

+xread(int argc, char **argv)

+{

+	Memimage *m;

+

+	if(argc < 2 || argc > 3){

+		fprint(2, "usage: r image [filename]\n");

+		return;

+	}

+	m = readi(argc == 3 ? argv[2] : argv[1]);

+	if(m != nil)

+		iput(argv[1], m, argc == 3 ? argv[2] : argv[1]);

+}

+

+void

+xwrite(int argc, char **argv)

+{

+	if(argc < 2 || argc > 3){

+		fprint(2, "usage: w image [filename]\n");

+		return;

+	}

+	Memimage *m = namei(argv[1], 1);

+	if(m == nil)

+		return;

+	writei(m, argc == 3 ? argv[2] : argv[1], 0);

+}

+

+void

+xdisplay(int argc, char **argv)

+{

+	int i;

+

+	if(argc == 1){

+		if(nfiles > 0)

+			show(files[nfiles-1].m);

+		return;

+	}

+	

+	for(i=1; i<argc; i++){

+		Memimage *m = namei(argv[i], 1);

+		if(m)

+			show(m);

+	}

+}

+

+char* prolog = 

+	"#include <u.h>\n"

+	"#include <libc.h>\n"

+	"#include <draw.h>\n"

+	"#include <memdraw.h>\n"

+	"\n"

+	"Memimage*\n"

+	"READ(char *file)\n"

+	"{\n"

+	"	Memimage *m;\n"

+	"	int fd = open(file, OREAD);\n"

+	"	if(fd < 0) sysfatal(\"open %s: %r\", file);\n"

+	"	m = readmemimage(fd);\n"

+	"	if(m == nil) sysfatal(\"readmemimage %s: %r\", file);\n"

+	"	return m;\n"

+	"}\n\n"

+	"void\n"

+	"WRITE(Memimage *m, char *file)\n"

+	"{\n"

+	"	int fd = create(file, OWRITE, 0666);\n"

+	"	if(fd < 0) sysfatal(\"create %s: %r\", file);\n"

+	"	if(writememimage(fd, m) < 0) sysfatal(\"writememimage %s: %r\", file);\n"

+	"}\n\n"

+	"int\n"

+	"POW(int a, int b)\n"

+	"{\n"

+	"	int t;\n"

+	"	if(b <= 0) return 1;\n"

+	"	if(b == 1) return a;\n"

+	"	t = POW(a, b/2);\n"

+	"	t *= t;\n"

+	"	if(b%2) t *= a;\n"

+	"	return t;\n"

+	"}\n"

+	"\n"

+	"int\n"

+	"DIV(int a, int b)\n"

+	"{\n"

+	"	if(b == 0) return 0;\n"

+	"	return a/b;\n"

+	"}\n"

+	"\n"

+	"int\n"

+	"MOD(int a, int b)\n"

+	"{\n"

+	"	if(b == 0) return 0;\n"

+	"	return a%b;\n"

+	"}\n"

+	"\n"

+	"#define Z 255\n"

+	"\n"

+	"uchar\n"

+	"IMAGE(Memimage *m, int x, int y, int z)\n"

+	"{\n"

+	"	if(x < 0 || y < 0 || z < 0 || x >= Dx(m->r) || y >= Dy(m->r) || z > 3) return 0;\n"

+	"	return byteaddr(m, addpt(m->r.min, Pt(x,y)))[z];\n"

+	"}\n"

+	"\n"

+	"uchar*\n"

+	"WIMAGE(Memimage *m, int x, int y, int z)\n"

+	"{\n"

+	"	static uchar devnull;\n"

+	"	if(x < 0 || y < 0 || z < 0 || x >= Dx(m->r) || y >= Dy(m->r) || z > 3) return &devnull;\n"

+	"	return byteaddr(m, addpt(m->r.min, Pt(x,y))) + z;\n"

+	"}\n"

+	"\n"

+	"#define CLIP(x) ((x) < 0 ? 0 : (x) > 255 ? 255 : (x))\n"

+	"\n"

+	"void main(void) {\n"

+	"	int x, y, z, T;\n"

+	;

+

+int quiet;

+

+void

+runprog(char *name, char *cmd)

+{

+	int i, fd, isnew;

+	Memimage *m;

+

+	if((fd = create("/tmp/pico-run.c", OWRITE, 0666)) < 0){

+		fprint(2, "create /tmp/pico-run.c: %r");

+		return;

+	}

+

+	write(fd, prolog, strlen(prolog));

+	fprint(fd, "\tint X = %d, Y = %d;\n", DX, DY);

+	fprint(fd, "\tMemimage *old, *OLD[%d+1];\n", nfiles);

+

+	isnew = namei(name, 0) == nil;

+	if(isnew){

+		fprint(fd, "\tMemimage *new = allocmemimage(Rect(0, 0, X, Y), ABGR32);\n");

+		fprint(fd, "\tif(new == nil) sysfatal(\"allocmemimage: %%r\");\n");

+		if(strcmp(name, "new") != 0)

+			fprint(fd, "\tMemimage *%s = new;\n", name);

+	}

+

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

+		if(!files[i].ref)

+			continue;

+		fprint(fd, "\tOLD[%d] = old = READ(\"/tmp/pico-run.%d.bit\");\n", i, i);

+		if(files[i].name[0] != '$'){

+			fprint(fd, "\tMemimage *%s = old;\n", files[i].name);

+			if(strcmp(files[i].name, name) == 0)

+				fprint(fd, "Memimage* new = %s;\n", files[i].name);

+		}

+	}

+

+	fprint(fd, "\tfor(z=0; z<4; z++) for(y=0; y<Y; y++) for(x=0; x<X; x++) {\n");

+	fprint(fd, "\t\t%s\n", cmd);

+	fprint(fd, "\t}");

+	fprint(fd, "\tWRITE(new, \"/tmp/pico-run.out.bit\");\n");

+	fprint(fd, "\texits(0);\n}\n");

+	close(fd);

+

+	if(access("/tmp/pico-run.mk", AEXIST) < 0){

+		if((fd = create("/tmp/pico-run.mk", OWRITE|ORCLOSE, 0666)) < 0){

+			fprint(2, "create /tmp/pico-run.mk: %r");

+			goto cleanup;

+		}

+		fprint(fd, "</$objtype/mkfile\n"

+			"/tmp/pico-run:Q: /tmp/pico-run.c\n"

+			"\t$CC -o /tmp/pico-run.$O /tmp/pico-run.c\n"

+			"\t$LD -o $target /tmp/pico-run.$O\n"

+			"\t$target\n"

+			"\trm -f /tmp/pico-run.$O\n");

+	}

+	if(system("mk -f /tmp/pico-run.mk /tmp/pico-run") < 0)

+		goto cleanup;

+

+	m = readi("/tmp/pico-run.out.bit");

+	if(m){

+		if(strcmp(name, "new") != 0)

+			iput(name, m, nil);

+		else

+			iput("", m, nil);

+		if(!quiet)

+			show(m);

+	}

+

+	remove("/tmp/pico-run.c");

+cleanup:

+	remove("/tmp/pico-run");

+	remove("/tmp/pico-run.out.bit");

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

+		files[i].ref = 0;

+}

+

+struct {

+	char *s;

+	void (*f)(int, char**);

+} cmds[] = {

+	"d", xdisplay,

+	"f", xfiles,

+	"q", xquit,

+	"r", xread,

+	"w", xwrite,

+};

+

+void

+main(int argc, char **argv)

+{

+	Biobuf b;

+	char *p, *f[10];

+	int nf;

+	int i, l;

+

+	ARGBEGIN{

+	case 'q':

+		quiet = 1;

+		break;

+	}ARGEND

+

+	if(memimageinit() < 0)

+		sysfatal("memimageinit: %r");

+	Binit(&b, 0, OREAD);

+	setjmp(boomer);

+	for(;;){

+	reread:

+		if(!quiet)

+			fprint(2, "-> ");

+		if((p = Brdline(&b, '\n')) == 0)

+			break;

+		p[Blinelen(&b)-1] = 0;

+		while(*p != 0 && isspace(*p))

+			p++;

+		if(*p == 0)

+			goto reread;

+		for(i=0; i<nelem(cmds); i++){

+			l = strlen(cmds[i].s);

+			if(strncmp(p, cmds[i].s, l) == 0 && (p[l] == 0 || isspace(p[l]))){

+				nf = tokenize(p, f, nelem(f));

+				cmds[i].f(nf, f);

+				goto reread;

+			}

+		}

+		

+		inp = p;

+		newname = nil;

+		cmd = nil;

+		yyparse();

+		runprog(newname, cmd);

+	}

+	exits(0);	

+}

+

+int

+newwin(void)

+{

+	char *srv;

+	char spec[100];

+	int srvfd, pid;

+

+	rfork(RFNAMEG);

+

+	srv = getenv("wsys");

+	if(srv == 0){

+		fprint(2, "no graphics: $wsys not set\n");

+		return -1;

+	}

+	srvfd = open(srv, ORDWR);

+	free(srv);

+	if(srvfd == -1){

+		fprint(2, "no graphics: can't open %s: %r\n", srv);

+		return -1;

+	}

+

+	sprint(spec, "new -dx %d -dy %d -pid 0", DX+8 < 100 ? 100 : DX+8, DY+8 < 48 ? 48 : DY+8);

+	if(mount(srvfd, -1, "/mnt/wsys", 0, spec) == -1){

+		fprint(2, "no graphics: mount /mnt/wsys: %r (spec=%s)\n", spec);

+		return -1;

+	}

+	close(srvfd);

+

+	switch(pid = rfork(RFFDG|RFPROC|RFNAMEG|RFENVG|RFNOTEG|RFNOWAIT)){

+	case -1:

+		fprint(2, "no graphics: can't fork: %r\n");

+		break;

+	}

+	if(pid == 0)

+		bind("/mnt/wsys", "/dev", MBEFORE);

+	else

+		unmount(nil, "/mnt/wsys");

+	return pid;

+}

+

+Image *displayed;

+

+void

+eresized(int new)

+{

+	if(new && getwindow(display, Refnone) < 0)

+		fprint(2,"can't reattach to window");

+	draw(screen, screen->r, displayed, nil, displayed->r.min);

+	flushimage(display, 1);

+}

+

+void

+showloop(Memimage *m)

+{

+	Rectangle r;

+

+	if(initdraw(0, 0, "pico") < 0){

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

+		return;

+	}

+	einit(Emouse|Ekeyboard);

+	if((displayed = allocimage(display, m->r, m->chan, 0, DNofill)) == nil){

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

+		return;

+	}

+	r = displayed->r;

+	while(r.min.y < displayed->r.max.y){

+		r.max.y = r.min.y + 1;

+		if(loadimage(displayed, r, byteaddr(m, r.min), Dx(r)*m->depth/8) < 0){

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

+			return;

+		}

+		r.min.y++;

+	}

+	close(0);

+	eresized(0);

+	for(;;){

+		Event e;

+		flushimage(display, 0);

+		switch(eread(Emouse|Ekeyboard, &e)){

+		case Ekeyboard:

+			if(e.kbdc == 'q')

+				return;

+			eresized(0);

+			break;

+		case Emouse:

+			if(e.mouse.buttons&4)

+				return;

+			break;

+		}

+	}

+}

+

+void

+show(Memimage *m)

+{

+	DX = Dx(m->r);

+	DY = Dy(m->r);

+	if(newwin() != 0)

+		return;

+	showloop(m);

+	exits(0);

+}