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freebsd/contrib/perl5/doop.c

529 lines
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C
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/* doop.c
*
* Copyright (c) 1991-1997, Larry Wall
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*
*/
/*
* "'So that was the job I felt I had to do when I started,' thought Sam."
*/
#include "EXTERN.h"
#include "perl.h"
#if !defined(NSIG) || defined(M_UNIX) || defined(M_XENIX)
#include <signal.h>
#endif
I32
do_trans(SV *sv, OP *arg)
{
dTHR;
register short *tbl;
register U8 *s;
register U8 *send;
register U8 *d;
register I32 ch;
register I32 matches = 0;
register I32 squash = PL_op->op_private & OPpTRANS_SQUASH;
register U8 *p;
STRLEN len;
if (SvREADONLY(sv) && !(PL_op->op_private & OPpTRANS_COUNTONLY))
croak(no_modify);
tbl = (short*)cPVOP->op_pv;
s = (U8*)SvPV(sv, len);
if (!len)
return 0;
if (!SvPOKp(sv))
s = (U8*)SvPV_force(sv, len);
(void)SvPOK_only(sv);
send = s + len;
if (!tbl || !s)
croak("panic: do_trans");
DEBUG_t( deb("2.TBL\n"));
if (!PL_op->op_private) {
while (s < send) {
if ((ch = tbl[*s]) >= 0) {
matches++;
*s = ch;
}
s++;
}
SvSETMAGIC(sv);
}
else if (PL_op->op_private & OPpTRANS_COUNTONLY) {
while (s < send) {
if (tbl[*s] >= 0)
matches++;
s++;
}
}
else {
d = s;
p = send;
while (s < send) {
if ((ch = tbl[*s]) >= 0) {
*d = ch;
matches++;
if (squash) {
if (p == d - 1 && *p == *d)
matches--;
else
p = d++;
}
else
d++;
}
else if (ch == -1) /* -1 is unmapped character */
*d++ = *s; /* -2 is delete character */
s++;
}
matches += send - d; /* account for disappeared chars */
*d = '\0';
SvCUR_set(sv, d - (U8*)SvPVX(sv));
SvSETMAGIC(sv);
}
return matches;
}
void
do_join(register SV *sv, SV *del, register SV **mark, register SV **sp)
{
SV **oldmark = mark;
register I32 items = sp - mark;
register STRLEN len;
STRLEN delimlen;
register char *delim = SvPV(del, delimlen);
STRLEN tmplen;
mark++;
len = (items > 0 ? (delimlen * (items - 1) ) : 0);
if (SvTYPE(sv) < SVt_PV)
sv_upgrade(sv, SVt_PV);
if (SvLEN(sv) < len + items) { /* current length is way too short */
while (items-- > 0) {
if (*mark && !SvGMAGICAL(*mark) && SvOK(*mark)) {
SvPV(*mark, tmplen);
len += tmplen;
}
mark++;
}
SvGROW(sv, len + 1); /* so try to pre-extend */
mark = oldmark;
items = sp - mark;;
++mark;
}
if (items-- > 0) {
char *s;
if (*mark) {
s = SvPV(*mark, tmplen);
sv_setpvn(sv, s, tmplen);
}
else
sv_setpv(sv, "");
mark++;
}
else
sv_setpv(sv,"");
len = delimlen;
if (len) {
for (; items > 0; items--,mark++) {
sv_catpvn(sv,delim,len);
sv_catsv(sv,*mark);
}
}
else {
for (; items > 0; items--,mark++)
sv_catsv(sv,*mark);
}
SvSETMAGIC(sv);
}
void
do_sprintf(SV *sv, I32 len, SV **sarg)
{
STRLEN patlen;
char *pat = SvPV(*sarg, patlen);
bool do_taint = FALSE;
sv_vsetpvfn(sv, pat, patlen, Null(va_list*), sarg + 1, len - 1, &do_taint);
SvSETMAGIC(sv);
if (do_taint)
SvTAINTED_on(sv);
}
void
do_vecset(SV *sv)
{
SV *targ = LvTARG(sv);
register I32 offset;
register I32 size;
register unsigned char *s;
register unsigned long lval;
I32 mask;
STRLEN targlen;
STRLEN len;
if (!targ)
return;
s = (unsigned char*)SvPV_force(targ, targlen);
lval = U_L(SvNV(sv));
offset = LvTARGOFF(sv);
size = LvTARGLEN(sv);
len = (offset + size + 7) / 8;
if (len > targlen) {
s = (unsigned char*)SvGROW(targ, len + 1);
(void)memzero(s + targlen, len - targlen + 1);
SvCUR_set(targ, len);
}
if (size < 8) {
mask = (1 << size) - 1;
size = offset & 7;
lval &= mask;
offset >>= 3;
s[offset] &= ~(mask << size);
s[offset] |= lval << size;
}
else {
offset >>= 3;
if (size == 8)
s[offset] = lval & 255;
else if (size == 16) {
s[offset] = (lval >> 8) & 255;
s[offset+1] = lval & 255;
}
else if (size == 32) {
s[offset] = (lval >> 24) & 255;
s[offset+1] = (lval >> 16) & 255;
s[offset+2] = (lval >> 8) & 255;
s[offset+3] = lval & 255;
}
}
}
void
do_chop(register SV *astr, register SV *sv)
{
STRLEN len;
char *s;
if (SvTYPE(sv) == SVt_PVAV) {
register I32 i;
I32 max;
AV* av = (AV*)sv;
max = AvFILL(av);
for (i = 0; i <= max; i++) {
sv = (SV*)av_fetch(av, i, FALSE);
if (sv && ((sv = *(SV**)sv), sv != &PL_sv_undef))
do_chop(astr, sv);
}
return;
}
if (SvTYPE(sv) == SVt_PVHV) {
HV* hv = (HV*)sv;
HE* entry;
(void)hv_iterinit(hv);
/*SUPPRESS 560*/
while (entry = hv_iternext(hv))
do_chop(astr,hv_iterval(hv,entry));
return;
}
s = SvPV(sv, len);
if (len && !SvPOK(sv))
s = SvPV_force(sv, len);
if (s && len) {
s += --len;
sv_setpvn(astr, s, 1);
*s = '\0';
SvCUR_set(sv, len);
SvNIOK_off(sv);
}
else
sv_setpvn(astr, "", 0);
SvSETMAGIC(sv);
}
I32
do_chomp(register SV *sv)
{
dTHR;
register I32 count;
STRLEN len;
char *s;
if (RsSNARF(PL_rs))
return 0;
count = 0;
if (SvTYPE(sv) == SVt_PVAV) {
register I32 i;
I32 max;
AV* av = (AV*)sv;
max = AvFILL(av);
for (i = 0; i <= max; i++) {
sv = (SV*)av_fetch(av, i, FALSE);
if (sv && ((sv = *(SV**)sv), sv != &PL_sv_undef))
count += do_chomp(sv);
}
return count;
}
if (SvTYPE(sv) == SVt_PVHV) {
HV* hv = (HV*)sv;
HE* entry;
(void)hv_iterinit(hv);
/*SUPPRESS 560*/
while (entry = hv_iternext(hv))
count += do_chomp(hv_iterval(hv,entry));
return count;
}
s = SvPV(sv, len);
if (len && !SvPOKp(sv))
s = SvPV_force(sv, len);
if (s && len) {
s += --len;
if (RsPARA(PL_rs)) {
if (*s != '\n')
goto nope;
++count;
while (len && s[-1] == '\n') {
--len;
--s;
++count;
}
}
else {
STRLEN rslen;
char *rsptr = SvPV(PL_rs, rslen);
if (rslen == 1) {
if (*s != *rsptr)
goto nope;
++count;
}
else {
if (len < rslen - 1)
goto nope;
len -= rslen - 1;
s -= rslen - 1;
if (memNE(s, rsptr, rslen))
goto nope;
count += rslen;
}
}
*s = '\0';
SvCUR_set(sv, len);
SvNIOK_off(sv);
}
nope:
SvSETMAGIC(sv);
return count;
}
void
do_vop(I32 optype, SV *sv, SV *left, SV *right)
{
dTHR; /* just for taint */
#ifdef LIBERAL
register long *dl;
register long *ll;
register long *rl;
#endif
register char *dc;
STRLEN leftlen;
STRLEN rightlen;
register char *lc;
register char *rc;
register I32 len;
I32 lensave;
char *lsave;
char *rsave;
if (sv != left || (optype != OP_BIT_AND && !SvOK(sv) && !SvGMAGICAL(sv)))
sv_setpvn(sv, "", 0); /* avoid undef warning on |= and ^= */
lsave = lc = SvPV(left, leftlen);
rsave = rc = SvPV(right, rightlen);
len = leftlen < rightlen ? leftlen : rightlen;
lensave = len;
if (SvOK(sv) || SvTYPE(sv) > SVt_PVMG) {
dc = SvPV_force(sv, PL_na);
if (SvCUR(sv) < len) {
dc = SvGROW(sv, len + 1);
(void)memzero(dc + SvCUR(sv), len - SvCUR(sv) + 1);
}
}
else {
I32 needlen = ((optype == OP_BIT_AND)
? len : (leftlen > rightlen ? leftlen : rightlen));
Newz(801, dc, needlen + 1, char);
(void)sv_usepvn(sv, dc, needlen);
dc = SvPVX(sv); /* sv_usepvn() calls Renew() */
}
SvCUR_set(sv, len);
(void)SvPOK_only(sv);
#ifdef LIBERAL
if (len >= sizeof(long)*4 &&
!((long)dc % sizeof(long)) &&
!((long)lc % sizeof(long)) &&
!((long)rc % sizeof(long))) /* It's almost always aligned... */
{
I32 remainder = len % (sizeof(long)*4);
len /= (sizeof(long)*4);
dl = (long*)dc;
ll = (long*)lc;
rl = (long*)rc;
switch (optype) {
case OP_BIT_AND:
while (len--) {
*dl++ = *ll++ & *rl++;
*dl++ = *ll++ & *rl++;
*dl++ = *ll++ & *rl++;
*dl++ = *ll++ & *rl++;
}
break;
case OP_BIT_XOR:
while (len--) {
*dl++ = *ll++ ^ *rl++;
*dl++ = *ll++ ^ *rl++;
*dl++ = *ll++ ^ *rl++;
*dl++ = *ll++ ^ *rl++;
}
break;
case OP_BIT_OR:
while (len--) {
*dl++ = *ll++ | *rl++;
*dl++ = *ll++ | *rl++;
*dl++ = *ll++ | *rl++;
*dl++ = *ll++ | *rl++;
}
}
dc = (char*)dl;
lc = (char*)ll;
rc = (char*)rl;
len = remainder;
}
#endif
{
switch (optype) {
case OP_BIT_AND:
while (len--)
*dc++ = *lc++ & *rc++;
break;
case OP_BIT_XOR:
while (len--)
*dc++ = *lc++ ^ *rc++;
goto mop_up;
case OP_BIT_OR:
while (len--)
*dc++ = *lc++ | *rc++;
mop_up:
len = lensave;
if (rightlen > len)
sv_catpvn(sv, rsave + len, rightlen - len);
else if (leftlen > len)
sv_catpvn(sv, lsave + len, leftlen - len);
else
*SvEND(sv) = '\0';
break;
}
}
SvTAINT(sv);
}
OP *
do_kv(ARGSproto)
{
djSP;
HV *hv = (HV*)POPs;
HV *keys;
register HE *entry;
SV *tmpstr;
I32 gimme = GIMME_V;
I32 dokeys = (PL_op->op_type == OP_KEYS);
I32 dovalues = (PL_op->op_type == OP_VALUES);
I32 realhv = (SvTYPE(hv) == SVt_PVHV);
if (PL_op->op_type == OP_RV2HV || PL_op->op_type == OP_PADHV)
dokeys = dovalues = TRUE;
if (!hv) {
if (PL_op->op_flags & OPf_MOD) { /* lvalue */
dTARGET; /* make sure to clear its target here */
if (SvTYPE(TARG) == SVt_PVLV)
LvTARG(TARG) = Nullsv;
PUSHs(TARG);
}
RETURN;
}
keys = realhv ? hv : avhv_keys((AV*)hv);
(void)hv_iterinit(keys); /* always reset iterator regardless */
if (gimme == G_VOID)
RETURN;
if (gimme == G_SCALAR) {
IV i;
dTARGET;
if (PL_op->op_flags & OPf_MOD) { /* lvalue */
if (SvTYPE(TARG) < SVt_PVLV) {
sv_upgrade(TARG, SVt_PVLV);
sv_magic(TARG, Nullsv, 'k', Nullch, 0);
}
LvTYPE(TARG) = 'k';
if (LvTARG(TARG) != (SV*)keys) {
if (LvTARG(TARG))
SvREFCNT_dec(LvTARG(TARG));
LvTARG(TARG) = SvREFCNT_inc(keys);
}
PUSHs(TARG);
RETURN;
}
if (!SvRMAGICAL(keys) || !mg_find((SV*)keys,'P'))
i = HvKEYS(keys);
else {
i = 0;
/*SUPPRESS 560*/
while (hv_iternext(keys)) i++;
}
PUSHi( i );
RETURN;
}
EXTEND(SP, HvKEYS(keys) * (dokeys + dovalues));
PUTBACK; /* hv_iternext and hv_iterval might clobber stack_sp */
while (entry = hv_iternext(keys)) {
SPAGAIN;
if (dokeys)
XPUSHs(hv_iterkeysv(entry)); /* won't clobber stack_sp */
if (dovalues) {
tmpstr = sv_newmortal();
PUTBACK;
sv_setsv(tmpstr,realhv ?
hv_iterval(hv,entry) : avhv_iterval((AV*)hv,entry));
DEBUG_H(sv_setpvf(tmpstr, "%lu%%%d=%lu",
(unsigned long)HeHASH(entry),
HvMAX(keys)+1,
(unsigned long)(HeHASH(entry) & HvMAX(keys))));
SPAGAIN;
XPUSHs(tmpstr);
}
PUTBACK;
}
return NORMAL;
}
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