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|
/* This file is included by eval.c. It's separate from eval.c to keep
* kit sizes from getting too big.
*/
/* $Header: evalargs.xc,v 3.0.1.9 91/01/11 18:00:18 lwall Locked $
*
* $Log: evalargs.xc,v $
* Revision 3.0.1.9 91/01/11 18:00:18 lwall
* patch42: <> input to individual array elements was suboptimal
*
* Revision 3.0.1.8 90/11/10 01:35:49 lwall
* patch38: array slurps are now faster and take less memory
*
* Revision 3.0.1.7 90/10/15 16:48:11 lwall
* patch29: non-existent array values no longer cause core dumps
* patch29: added caller
*
* Revision 3.0.1.6 90/08/09 03:37:15 lwall
* patch19: passing *name to subroutine now forces filehandle and array creation
* patch19: `command` in array context now returns array of lines
* patch19: <handle> input is a little more efficient
*
* Revision 3.0.1.5 90/03/27 15:54:42 lwall
* patch16: MSDOS support
*
* Revision 3.0.1.4 90/02/28 17:38:37 lwall
* patch9: $#foo -= 2 didn't work
*
* Revision 3.0.1.3 89/11/17 15:25:07 lwall
* patch5: constant numeric subscripts disappeared in ?:
*
* Revision 3.0.1.2 89/11/11 04:33:05 lwall
* patch2: Configure now locates csh
*
* Revision 3.0.1.1 89/10/26 23:12:55 lwall
* patch1: glob didn't free a temporary string
*
* Revision 3.0 89/10/18 15:17:16 lwall
* 3.0 baseline
*
*/
for (anum = 1; anum <= maxarg; anum++) {
argflags = arg[anum].arg_flags;
argtype = arg[anum].arg_type;
argptr = arg[anum].arg_ptr;
re_eval:
switch (argtype) {
default:
st[++sp] = &str_undef;
#ifdef DEBUGGING
tmps = "NULL";
#endif
break;
case A_EXPR:
#ifdef DEBUGGING
if (debug & 8) {
tmps = "EXPR";
deb("%d.EXPR =>\n",anum);
}
#endif
sp = eval(argptr.arg_arg,
(argflags & AF_ARYOK) ? G_ARRAY : G_SCALAR, sp);
if (sp + (maxarg - anum) > stack->ary_max)
astore(stack, sp + (maxarg - anum), Nullstr);
st = stack->ary_array; /* possibly reallocated */
break;
case A_CMD:
#ifdef DEBUGGING
if (debug & 8) {
tmps = "CMD";
deb("%d.CMD (%lx) =>\n",anum,argptr.arg_cmd);
}
#endif
sp = cmd_exec(argptr.arg_cmd, gimme, sp);
if (sp + (maxarg - anum) > stack->ary_max)
astore(stack, sp + (maxarg - anum), Nullstr);
st = stack->ary_array; /* possibly reallocated */
break;
case A_LARYSTAB:
++sp;
switch (optype) {
case O_ITEM2: argtype = 2; break;
case O_ITEM3: argtype = 3; break;
default: argtype = anum; break;
}
str = afetch(stab_array(argptr.arg_stab),
arg[argtype].arg_len - arybase, TRUE);
#ifdef DEBUGGING
if (debug & 8) {
(void)sprintf(buf,"LARYSTAB $%s[%d]",stab_name(argptr.arg_stab),
arg[argtype].arg_len);
tmps = buf;
}
#endif
goto do_crement;
case A_ARYSTAB:
switch (optype) {
case O_ITEM2: argtype = 2; break;
case O_ITEM3: argtype = 3; break;
default: argtype = anum; break;
}
st[++sp] = afetch(stab_array(argptr.arg_stab),
arg[argtype].arg_len - arybase, FALSE);
#ifdef DEBUGGING
if (debug & 8) {
(void)sprintf(buf,"ARYSTAB $%s[%d]",stab_name(argptr.arg_stab),
arg[argtype].arg_len);
tmps = buf;
}
#endif
break;
case A_STAR:
stab = argptr.arg_stab;
st[++sp] = (STR*)stab;
if (!stab_xarray(stab))
aadd(stab);
if (!stab_xhash(stab))
hadd(stab);
if (!stab_io(stab))
stab_io(stab) = stio_new();
#ifdef DEBUGGING
if (debug & 8) {
(void)sprintf(buf,"STAR *%s",stab_name(argptr.arg_stab));
tmps = buf;
}
#endif
break;
case A_LSTAR:
str = st[++sp] = (STR*)argptr.arg_stab;
#ifdef DEBUGGING
if (debug & 8) {
(void)sprintf(buf,"LSTAR *%s",stab_name(argptr.arg_stab));
tmps = buf;
}
#endif
break;
case A_STAB:
st[++sp] = STAB_STR(argptr.arg_stab);
#ifdef DEBUGGING
if (debug & 8) {
(void)sprintf(buf,"STAB $%s",stab_name(argptr.arg_stab));
tmps = buf;
}
#endif
break;
case A_LEXPR:
#ifdef DEBUGGING
if (debug & 8) {
tmps = "LEXPR";
deb("%d.LEXPR =>\n",anum);
}
#endif
if (argflags & AF_ARYOK) {
sp = eval(argptr.arg_arg, G_ARRAY, sp);
if (sp + (maxarg - anum) > stack->ary_max)
astore(stack, sp + (maxarg - anum), Nullstr);
st = stack->ary_array; /* possibly reallocated */
}
else {
sp = eval(argptr.arg_arg, G_SCALAR, sp);
st = stack->ary_array; /* possibly reallocated */
str = st[sp];
goto do_crement;
}
break;
case A_LVAL:
#ifdef DEBUGGING
if (debug & 8) {
(void)sprintf(buf,"LVAL $%s",stab_name(argptr.arg_stab));
tmps = buf;
}
#endif
++sp;
str = STAB_STR(argptr.arg_stab);
if (!str)
fatal("panic: A_LVAL");
do_crement:
assigning = TRUE;
if (argflags & AF_PRE) {
if (argflags & AF_UP)
str_inc(str);
else
str_dec(str);
STABSET(str);
st[sp] = str;
str = arg->arg_ptr.arg_str;
}
else if (argflags & AF_POST) {
st[sp] = str_static(str);
if (argflags & AF_UP)
str_inc(str);
else
str_dec(str);
STABSET(str);
str = arg->arg_ptr.arg_str;
}
else
st[sp] = str;
break;
case A_LARYLEN:
++sp;
stab = argptr.arg_stab;
str = stab_array(argptr.arg_stab)->ary_magic;
if (optype != O_SASSIGN || argflags & (AF_PRE|AF_POST))
str_numset(str,(double)(stab_array(stab)->ary_fill+arybase));
#ifdef DEBUGGING
tmps = "LARYLEN";
#endif
if (!str)
fatal("panic: A_LEXPR");
goto do_crement;
case A_ARYLEN:
stab = argptr.arg_stab;
st[++sp] = stab_array(stab)->ary_magic;
str_numset(st[sp],(double)(stab_array(stab)->ary_fill+arybase));
#ifdef DEBUGGING
tmps = "ARYLEN";
#endif
break;
case A_SINGLE:
st[++sp] = argptr.arg_str;
#ifdef DEBUGGING
tmps = "SINGLE";
#endif
break;
case A_DOUBLE:
(void) interp(str,argptr.arg_str,sp);
st = stack->ary_array;
st[++sp] = str;
#ifdef DEBUGGING
tmps = "DOUBLE";
#endif
break;
case A_BACKTICK:
tmps = str_get(interp(str,argptr.arg_str,sp));
st = stack->ary_array;
#ifdef TAINT
taintproper("Insecure dependency in ``");
#endif
fp = mypopen(tmps,"r");
str_set(str,"");
if (fp) {
if (gimme == G_SCALAR) {
while (str_gets(str,fp,str->str_cur) != Nullch)
;
}
else {
for (;;) {
if (++sp > stack->ary_max) {
astore(stack, sp, Nullstr);
st = stack->ary_array;
}
str = st[sp] = Str_new(56,80);
if (str_gets(str,fp,0) == Nullch) {
sp--;
break;
}
if (str->str_len - str->str_cur > 20) {
str->str_len = str->str_cur+1;
Renew(str->str_ptr, str->str_len, char);
}
str_2static(str);
}
}
statusvalue = mypclose(fp);
}
else
statusvalue = -1;
if (gimme == G_SCALAR)
st[++sp] = str;
#ifdef DEBUGGING
tmps = "BACK";
#endif
break;
case A_WANTARRAY:
{
if (curcsv->wantarray == G_ARRAY)
st[++sp] = &str_yes;
else
st[++sp] = &str_no;
}
#ifdef DEBUGGING
tmps = "WANTARRAY";
#endif
break;
case A_INDREAD:
last_in_stab = stabent(str_get(STAB_STR(argptr.arg_stab)),TRUE);
old_record_separator = record_separator;
goto do_read;
case A_GLOB:
argflags |= AF_POST; /* enable newline chopping */
last_in_stab = argptr.arg_stab;
old_record_separator = record_separator;
#ifdef MSDOS
record_separator = 0;
#else
#ifdef CSH
record_separator = 0;
#else
record_separator = '\n';
#endif /* !CSH */
#endif /* !MSDOS */
goto do_read;
case A_READ:
last_in_stab = argptr.arg_stab;
old_record_separator = record_separator;
do_read:
if (anum > 1) /* assign to scalar */
gimme = G_SCALAR; /* force context to scalar */
if (gimme == G_ARRAY)
str = Str_new(57,0);
++sp;
fp = Nullfp;
if (stab_io(last_in_stab)) {
fp = stab_io(last_in_stab)->ifp;
if (!fp) {
if (stab_io(last_in_stab)->flags & IOF_ARGV) {
if (stab_io(last_in_stab)->flags & IOF_START) {
stab_io(last_in_stab)->flags &= ~IOF_START;
stab_io(last_in_stab)->lines = 0;
if (alen(stab_array(last_in_stab)) < 0) {
tmpstr = str_make("-",1); /* assume stdin */
(void)apush(stab_array(last_in_stab), tmpstr);
}
}
fp = nextargv(last_in_stab);
if (!fp) { /* Note: fp != stab_io(last_in_stab)->ifp */
(void)do_close(last_in_stab,FALSE); /* now it does*/
stab_io(last_in_stab)->flags |= IOF_START;
}
}
else if (argtype == A_GLOB) {
(void) interp(str,stab_val(last_in_stab),sp);
st = stack->ary_array;
tmpstr = Str_new(55,0);
#ifdef MSDOS
str_set(tmpstr, "perlglob ");
str_scat(tmpstr,str);
str_cat(tmpstr," |");
#else
#ifdef CSH
str_nset(tmpstr,cshname,cshlen);
str_cat(tmpstr," -cf 'set nonomatch; glob ");
str_scat(tmpstr,str);
str_cat(tmpstr,"'|");
#else
str_set(tmpstr, "echo ");
str_scat(tmpstr,str);
str_cat(tmpstr,
"|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
#endif /* !CSH */
#endif /* !MSDOS */
(void)do_open(last_in_stab,tmpstr->str_ptr,
tmpstr->str_cur);
fp = stab_io(last_in_stab)->ifp;
str_free(tmpstr);
}
}
}
if (!fp && dowarn)
warn("Read on closed filehandle <%s>",stab_name(last_in_stab));
when = str->str_len; /* remember if already alloced */
if (!when)
Str_Grow(str,80); /* try short-buffering it */
keepgoing:
if (!fp)
st[sp] = &str_undef;
else if (!str_gets(str,fp, optype == O_RCAT ? str->str_cur : 0)) {
clearerr(fp);
if (stab_io(last_in_stab)->flags & IOF_ARGV) {
fp = nextargv(last_in_stab);
if (fp)
goto keepgoing;
(void)do_close(last_in_stab,FALSE);
stab_io(last_in_stab)->flags |= IOF_START;
}
else if (argflags & AF_POST) {
(void)do_close(last_in_stab,FALSE);
}
st[sp] = &str_undef;
record_separator = old_record_separator;
if (gimme == G_ARRAY) {
--sp;
str_2static(str);
goto array_return;
}
break;
}
else {
stab_io(last_in_stab)->lines++;
st[sp] = str;
#ifdef TAINT
str->str_tainted = 1; /* Anything from the outside world...*/
#endif
if (argflags & AF_POST) {
if (str->str_cur > 0)
str->str_cur--;
if (str->str_ptr[str->str_cur] == record_separator)
str->str_ptr[str->str_cur] = '\0';
else
str->str_cur++;
for (tmps = str->str_ptr; *tmps; tmps++)
if (!isalpha(*tmps) && !isdigit(*tmps) &&
index("$&*(){}[]'\";\\|?<>~`",*tmps))
break;
if (*tmps && stat(str->str_ptr,&statbuf) < 0)
goto keepgoing; /* unmatched wildcard? */
}
if (gimme == G_ARRAY) {
if (str->str_len - str->str_cur > 20) {
str->str_len = str->str_cur+1;
Renew(str->str_ptr, str->str_len, char);
}
str_2static(str);
if (++sp > stack->ary_max) {
astore(stack, sp, Nullstr);
st = stack->ary_array;
}
str = Str_new(58,80);
goto keepgoing;
}
else if (!when && str->str_len - str->str_cur > 80) {
/* try to reclaim a bit of scalar space on 1st alloc */
if (str->str_cur < 60)
str->str_len = 80;
else
str->str_len = str->str_cur+40; /* allow some slop */
Renew(str->str_ptr, str->str_len, char);
}
}
record_separator = old_record_separator;
#ifdef DEBUGGING
tmps = "READ";
#endif
break;
}
#ifdef DEBUGGING
if (debug & 8)
deb("%d.%s = '%s'\n",anum,tmps,str_peek(st[sp]));
#endif
if (anum < 8)
arglast[anum] = sp;
}
|
