ref: 61f4c085c402af665b436f6d010d61107551d8a3
dir: /sys/src/cmd/sam/xec.c/
#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
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;
}