forked from schacon/perl
/
pp_hot.c
2535 lines (2374 loc) · 57.9 KB
/
pp_hot.c
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/* pp_hot.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.
*
*/
/*
* Then he heard Merry change the note, and up went the Horn-cry of Buckland,
* shaking the air.
*
* Awake! Awake! Fear, Fire, Foes! Awake!
* Fire, Foes! Awake!
*/
#include "EXTERN.h"
#include "perl.h"
#ifdef I_UNISTD
#include <unistd.h>
#endif
#ifdef I_FCNTL
#include <fcntl.h>
#endif
#ifdef I_SYS_FILE
#include <sys/file.h>
#endif
/* Hot code. */
#ifdef USE_THREADS
static void
unset_cvowner(void *cvarg)
{
register CV* cv = (CV *) cvarg;
#ifdef DEBUGGING
dTHR;
#endif /* DEBUGGING */
DEBUG_S((PerlIO_printf(PerlIO_stderr(), "%p unsetting CvOWNER of %p:%s\n",
thr, cv, SvPEEK((SV*)cv))));
MUTEX_LOCK(CvMUTEXP(cv));
DEBUG_S(if (CvDEPTH(cv) != 0)
PerlIO_printf(PerlIO_stderr(), "depth %ld != 0\n",
CvDEPTH(cv)););
assert(thr == CvOWNER(cv));
CvOWNER(cv) = 0;
MUTEX_UNLOCK(CvMUTEXP(cv));
SvREFCNT_dec(cv);
}
#endif /* USE_THREADS */
PP(pp_const)
{
djSP;
XPUSHs(cSVOP->op_sv);
RETURN;
}
PP(pp_nextstate)
{
PL_curcop = (COP*)PL_op;
TAINT_NOT; /* Each statement is presumed innocent */
PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
FREETMPS;
return NORMAL;
}
PP(pp_gvsv)
{
djSP;
EXTEND(SP,1);
if (PL_op->op_private & OPpLVAL_INTRO)
PUSHs(save_scalar(cGVOP->op_gv));
else
PUSHs(GvSV(cGVOP->op_gv));
RETURN;
}
PP(pp_null)
{
return NORMAL;
}
PP(pp_pushmark)
{
PUSHMARK(PL_stack_sp);
return NORMAL;
}
PP(pp_stringify)
{
djSP; dTARGET;
STRLEN len;
char *s;
s = SvPV(TOPs,len);
sv_setpvn(TARG,s,len);
SETTARG;
RETURN;
}
PP(pp_gv)
{
djSP;
XPUSHs((SV*)cGVOP->op_gv);
RETURN;
}
PP(pp_and)
{
djSP;
if (!SvTRUE(TOPs))
RETURN;
else {
--SP;
RETURNOP(cLOGOP->op_other);
}
}
PP(pp_sassign)
{
djSP; dPOPTOPssrl;
MAGIC *mg;
if (PL_op->op_private & OPpASSIGN_BACKWARDS) {
SV *temp;
temp = left; left = right; right = temp;
}
if (PL_tainting && PL_tainted && !SvTAINTED(left))
TAINT_NOT;
SvSetMagicSV(right, left);
SETs(right);
RETURN;
}
PP(pp_cond_expr)
{
djSP;
if (SvTRUEx(POPs))
RETURNOP(cCONDOP->op_true);
else
RETURNOP(cCONDOP->op_false);
}
PP(pp_unstack)
{
I32 oldsave;
TAINT_NOT; /* Each statement is presumed innocent */
PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
FREETMPS;
oldsave = PL_scopestack[PL_scopestack_ix - 1];
LEAVE_SCOPE(oldsave);
return NORMAL;
}
PP(pp_concat)
{
djSP; dATARGET; tryAMAGICbin(concat,opASSIGN);
{
dPOPTOPssrl;
STRLEN len;
char *s;
if (TARG != left) {
s = SvPV(left,len);
sv_setpvn(TARG,s,len);
}
else if (SvGMAGICAL(TARG))
mg_get(TARG);
else if (!SvOK(TARG) && SvTYPE(TARG) <= SVt_PVMG) {
sv_setpv(TARG, ""); /* Suppress warning. */
s = SvPV_force(TARG, len);
}
s = SvPV(right,len);
if (SvOK(TARG))
sv_catpvn(TARG,s,len);
else
sv_setpvn(TARG,s,len); /* suppress warning */
SETTARG;
RETURN;
}
}
PP(pp_padsv)
{
djSP; dTARGET;
XPUSHs(TARG);
if (PL_op->op_flags & OPf_MOD) {
if (PL_op->op_private & OPpLVAL_INTRO)
SAVECLEARSV(PL_curpad[PL_op->op_targ]);
else if (PL_op->op_private & OPpDEREF) {
PUTBACK;
vivify_ref(PL_curpad[PL_op->op_targ], PL_op->op_private & OPpDEREF);
SPAGAIN;
}
}
RETURN;
}
PP(pp_readline)
{
PL_last_in_gv = (GV*)(*PL_stack_sp--);
return do_readline();
}
PP(pp_eq)
{
djSP; tryAMAGICbinSET(eq,0);
{
dPOPnv;
SETs(boolSV(TOPn == value));
RETURN;
}
}
PP(pp_preinc)
{
djSP;
if (SvREADONLY(TOPs) || SvTYPE(TOPs) > SVt_PVLV)
croak(no_modify);
if (SvIOK(TOPs) && !SvNOK(TOPs) && !SvPOK(TOPs) &&
SvIVX(TOPs) != IV_MAX)
{
++SvIVX(TOPs);
SvFLAGS(TOPs) &= ~(SVp_NOK|SVp_POK);
}
else
sv_inc(TOPs);
SvSETMAGIC(TOPs);
return NORMAL;
}
PP(pp_or)
{
djSP;
if (SvTRUE(TOPs))
RETURN;
else {
--SP;
RETURNOP(cLOGOP->op_other);
}
}
PP(pp_add)
{
djSP; dATARGET; tryAMAGICbin(add,opASSIGN);
{
dPOPTOPnnrl_ul;
SETn( left + right );
RETURN;
}
}
PP(pp_aelemfast)
{
djSP;
AV *av = GvAV((GV*)cSVOP->op_sv);
U32 lval = PL_op->op_flags & OPf_MOD;
SV** svp = av_fetch(av, PL_op->op_private, lval);
SV *sv = (svp ? *svp : &PL_sv_undef);
EXTEND(SP, 1);
if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
sv = sv_mortalcopy(sv);
PUSHs(sv);
RETURN;
}
PP(pp_join)
{
djSP; dMARK; dTARGET;
MARK++;
do_join(TARG, *MARK, MARK, SP);
SP = MARK;
SETs(TARG);
RETURN;
}
PP(pp_pushre)
{
djSP;
#ifdef DEBUGGING
/*
* We ass_u_me that LvTARGOFF() comes first, and that two STRLENs
* will be enough to hold an OP*.
*/
SV* sv = sv_newmortal();
sv_upgrade(sv, SVt_PVLV);
LvTYPE(sv) = '/';
Copy(&PL_op, &LvTARGOFF(sv), 1, OP*);
XPUSHs(sv);
#else
XPUSHs((SV*)PL_op);
#endif
RETURN;
}
/* Oversized hot code. */
PP(pp_print)
{
djSP; dMARK; dORIGMARK;
GV *gv;
IO *io;
register PerlIO *fp;
MAGIC *mg;
if (PL_op->op_flags & OPf_STACKED)
gv = (GV*)*++MARK;
else
gv = PL_defoutgv;
if (SvRMAGICAL(gv) && (mg = mg_find((SV*)gv, 'q'))) {
if (MARK == ORIGMARK) {
/* If using default handle then we need to make space to
* pass object as 1st arg, so move other args up ...
*/
MEXTEND(SP, 1);
++MARK;
Move(MARK, MARK + 1, (SP - MARK) + 1, SV*);
++SP;
}
PUSHMARK(MARK - 1);
*MARK = mg->mg_obj;
PUTBACK;
ENTER;
perl_call_method("PRINT", G_SCALAR);
LEAVE;
SPAGAIN;
MARK = ORIGMARK + 1;
*MARK = *SP;
SP = MARK;
RETURN;
}
if (!(io = GvIO(gv))) {
if (PL_dowarn) {
SV* sv = sv_newmortal();
gv_fullname3(sv, gv, Nullch);
warn("Filehandle %s never opened", SvPV(sv,PL_na));
}
SETERRNO(EBADF,RMS$_IFI);
goto just_say_no;
}
else if (!(fp = IoOFP(io))) {
if (PL_dowarn) {
SV* sv = sv_newmortal();
gv_fullname3(sv, gv, Nullch);
if (IoIFP(io))
warn("Filehandle %s opened only for input", SvPV(sv,PL_na));
else
warn("print on closed filehandle %s", SvPV(sv,PL_na));
}
SETERRNO(EBADF,IoIFP(io)?RMS$_FAC:RMS$_IFI);
goto just_say_no;
}
else {
MARK++;
if (PL_ofslen) {
while (MARK <= SP) {
if (!do_print(*MARK, fp))
break;
MARK++;
if (MARK <= SP) {
if (PerlIO_write(fp, PL_ofs, PL_ofslen) == 0 || PerlIO_error(fp)) {
MARK--;
break;
}
}
}
}
else {
while (MARK <= SP) {
if (!do_print(*MARK, fp))
break;
MARK++;
}
}
if (MARK <= SP)
goto just_say_no;
else {
if (PL_orslen)
if (PerlIO_write(fp, PL_ors, PL_orslen) == 0 || PerlIO_error(fp))
goto just_say_no;
if (IoFLAGS(io) & IOf_FLUSH)
if (PerlIO_flush(fp) == EOF)
goto just_say_no;
}
}
SP = ORIGMARK;
PUSHs(&PL_sv_yes);
RETURN;
just_say_no:
SP = ORIGMARK;
PUSHs(&PL_sv_undef);
RETURN;
}
PP(pp_rv2av)
{
djSP; dPOPss;
AV *av;
if (SvROK(sv)) {
wasref:
av = (AV*)SvRV(sv);
if (SvTYPE(av) != SVt_PVAV)
DIE("Not an ARRAY reference");
if (PL_op->op_flags & OPf_REF) {
PUSHs((SV*)av);
RETURN;
}
}
else {
if (SvTYPE(sv) == SVt_PVAV) {
av = (AV*)sv;
if (PL_op->op_flags & OPf_REF) {
PUSHs((SV*)av);
RETURN;
}
}
else {
GV *gv;
if (SvTYPE(sv) != SVt_PVGV) {
char *sym;
if (SvGMAGICAL(sv)) {
mg_get(sv);
if (SvROK(sv))
goto wasref;
}
if (!SvOK(sv)) {
if (PL_op->op_flags & OPf_REF ||
PL_op->op_private & HINT_STRICT_REFS)
DIE(no_usym, "an ARRAY");
if (PL_dowarn)
warn(warn_uninit);
if (GIMME == G_ARRAY)
RETURN;
RETPUSHUNDEF;
}
sym = SvPV(sv,PL_na);
if (PL_op->op_private & HINT_STRICT_REFS)
DIE(no_symref, sym, "an ARRAY");
gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVAV);
} else {
gv = (GV*)sv;
}
av = GvAVn(gv);
if (PL_op->op_private & OPpLVAL_INTRO)
av = save_ary(gv);
if (PL_op->op_flags & OPf_REF) {
PUSHs((SV*)av);
RETURN;
}
}
}
if (GIMME == G_ARRAY) {
I32 maxarg = AvFILL(av) + 1;
EXTEND(SP, maxarg);
if (SvRMAGICAL(av)) {
U32 i;
for (i=0; i < maxarg; i++) {
SV **svp = av_fetch(av, i, FALSE);
SP[i+1] = (svp) ? *svp : &PL_sv_undef;
}
}
else {
Copy(AvARRAY(av), SP+1, maxarg, SV*);
}
SP += maxarg;
}
else {
dTARGET;
I32 maxarg = AvFILL(av) + 1;
PUSHi(maxarg);
}
RETURN;
}
PP(pp_rv2hv)
{
djSP; dTOPss;
HV *hv;
if (SvROK(sv)) {
wasref:
hv = (HV*)SvRV(sv);
if (SvTYPE(hv) != SVt_PVHV && SvTYPE(hv) != SVt_PVAV)
DIE("Not a HASH reference");
if (PL_op->op_flags & OPf_REF) {
SETs((SV*)hv);
RETURN;
}
}
else {
if (SvTYPE(sv) == SVt_PVHV || SvTYPE(sv) == SVt_PVAV) {
hv = (HV*)sv;
if (PL_op->op_flags & OPf_REF) {
SETs((SV*)hv);
RETURN;
}
}
else {
GV *gv;
if (SvTYPE(sv) != SVt_PVGV) {
char *sym;
if (SvGMAGICAL(sv)) {
mg_get(sv);
if (SvROK(sv))
goto wasref;
}
if (!SvOK(sv)) {
if (PL_op->op_flags & OPf_REF ||
PL_op->op_private & HINT_STRICT_REFS)
DIE(no_usym, "a HASH");
if (PL_dowarn)
warn(warn_uninit);
if (GIMME == G_ARRAY) {
SP--;
RETURN;
}
RETSETUNDEF;
}
sym = SvPV(sv,PL_na);
if (PL_op->op_private & HINT_STRICT_REFS)
DIE(no_symref, sym, "a HASH");
gv = (GV*)gv_fetchpv(sym, TRUE, SVt_PVHV);
} else {
gv = (GV*)sv;
}
hv = GvHVn(gv);
if (PL_op->op_private & OPpLVAL_INTRO)
hv = save_hash(gv);
if (PL_op->op_flags & OPf_REF) {
SETs((SV*)hv);
RETURN;
}
}
}
if (GIMME == G_ARRAY) { /* array wanted */
*PL_stack_sp = (SV*)hv;
return do_kv(ARGS);
}
else {
dTARGET;
if (SvTYPE(hv) == SVt_PVAV)
hv = avhv_keys((AV*)hv);
if (HvFILL(hv))
sv_setpvf(TARG, "%ld/%ld",
(long)HvFILL(hv), (long)HvMAX(hv) + 1);
else
sv_setiv(TARG, 0);
SETTARG;
RETURN;
}
}
PP(pp_aassign)
{
djSP;
SV **lastlelem = PL_stack_sp;
SV **lastrelem = PL_stack_base + POPMARK;
SV **firstrelem = PL_stack_base + POPMARK + 1;
SV **firstlelem = lastrelem + 1;
register SV **relem;
register SV **lelem;
register SV *sv;
register AV *ary;
I32 gimme;
HV *hash;
I32 i;
int magic;
PL_delaymagic = DM_DELAY; /* catch simultaneous items */
/* If there's a common identifier on both sides we have to take
* special care that assigning the identifier on the left doesn't
* clobber a value on the right that's used later in the list.
*/
if (PL_op->op_private & OPpASSIGN_COMMON) {
for (relem = firstrelem; relem <= lastrelem; relem++) {
/*SUPPRESS 560*/
if (sv = *relem) {
TAINT_NOT; /* Each item is independent */
*relem = sv_mortalcopy(sv);
}
}
}
relem = firstrelem;
lelem = firstlelem;
ary = Null(AV*);
hash = Null(HV*);
while (lelem <= lastlelem) {
TAINT_NOT; /* Each item stands on its own, taintwise. */
sv = *lelem++;
switch (SvTYPE(sv)) {
case SVt_PVAV:
ary = (AV*)sv;
magic = SvMAGICAL(ary) != 0;
av_clear(ary);
av_extend(ary, lastrelem - relem);
i = 0;
while (relem <= lastrelem) { /* gobble up all the rest */
SV **didstore;
sv = NEWSV(28,0);
assert(*relem);
sv_setsv(sv,*relem);
*(relem++) = sv;
didstore = av_store(ary,i++,sv);
if (magic) {
if (SvSMAGICAL(sv))
mg_set(sv);
if (!didstore)
SvREFCNT_dec(sv);
}
TAINT_NOT;
}
break;
case SVt_PVHV: {
SV *tmpstr;
hash = (HV*)sv;
magic = SvMAGICAL(hash) != 0;
hv_clear(hash);
while (relem < lastrelem) { /* gobble up all the rest */
HE *didstore;
if (*relem)
sv = *(relem++);
else
sv = &PL_sv_no, relem++;
tmpstr = NEWSV(29,0);
if (*relem)
sv_setsv(tmpstr,*relem); /* value */
*(relem++) = tmpstr;
didstore = hv_store_ent(hash,sv,tmpstr,0);
if (magic) {
if (SvSMAGICAL(tmpstr))
mg_set(tmpstr);
if (!didstore)
SvREFCNT_dec(tmpstr);
}
TAINT_NOT;
}
if (relem == lastrelem) {
if (*relem) {
HE *didstore;
if (PL_dowarn) {
if (relem == firstrelem &&
SvROK(*relem) &&
( SvTYPE(SvRV(*relem)) == SVt_PVAV ||
SvTYPE(SvRV(*relem)) == SVt_PVHV ) )
warn("Reference found where even-sized list expected");
else
warn("Odd number of elements in hash assignment");
}
tmpstr = NEWSV(29,0);
didstore = hv_store_ent(hash,*relem,tmpstr,0);
if (magic) {
if (SvSMAGICAL(tmpstr))
mg_set(tmpstr);
if (!didstore)
SvREFCNT_dec(tmpstr);
}
TAINT_NOT;
}
relem++;
}
}
break;
default:
if (SvTHINKFIRST(sv)) {
if (SvREADONLY(sv) && PL_curcop != &PL_compiling) {
if (!SvIMMORTAL(sv))
DIE(no_modify);
if (relem <= lastrelem)
relem++;
break;
}
if (SvROK(sv))
sv_unref(sv);
}
if (relem <= lastrelem) {
sv_setsv(sv, *relem);
*(relem++) = sv;
}
else
sv_setsv(sv, &PL_sv_undef);
SvSETMAGIC(sv);
break;
}
}
if (PL_delaymagic & ~DM_DELAY) {
if (PL_delaymagic & DM_UID) {
#ifdef HAS_SETRESUID
(void)setresuid(PL_uid,PL_euid,(Uid_t)-1);
#else
# ifdef HAS_SETREUID
(void)setreuid(PL_uid,PL_euid);
# else
# ifdef HAS_SETRUID
if ((PL_delaymagic & DM_UID) == DM_RUID) {
(void)setruid(PL_uid);
PL_delaymagic &= ~DM_RUID;
}
# endif /* HAS_SETRUID */
# ifdef HAS_SETEUID
if ((PL_delaymagic & DM_UID) == DM_EUID) {
(void)seteuid(PL_uid);
PL_delaymagic &= ~DM_EUID;
}
# endif /* HAS_SETEUID */
if (PL_delaymagic & DM_UID) {
if (PL_uid != PL_euid)
DIE("No setreuid available");
(void)PerlProc_setuid(PL_uid);
}
# endif /* HAS_SETREUID */
#endif /* HAS_SETRESUID */
PL_uid = (int)PerlProc_getuid();
PL_euid = (int)PerlProc_geteuid();
}
if (PL_delaymagic & DM_GID) {
#ifdef HAS_SETRESGID
(void)setresgid(PL_gid,PL_egid,(Gid_t)-1);
#else
# ifdef HAS_SETREGID
(void)setregid(PL_gid,PL_egid);
# else
# ifdef HAS_SETRGID
if ((PL_delaymagic & DM_GID) == DM_RGID) {
(void)setrgid(PL_gid);
PL_delaymagic &= ~DM_RGID;
}
# endif /* HAS_SETRGID */
# ifdef HAS_SETEGID
if ((PL_delaymagic & DM_GID) == DM_EGID) {
(void)setegid(PL_gid);
PL_delaymagic &= ~DM_EGID;
}
# endif /* HAS_SETEGID */
if (PL_delaymagic & DM_GID) {
if (PL_gid != PL_egid)
DIE("No setregid available");
(void)PerlProc_setgid(PL_gid);
}
# endif /* HAS_SETREGID */
#endif /* HAS_SETRESGID */
PL_gid = (int)PerlProc_getgid();
PL_egid = (int)PerlProc_getegid();
}
PL_tainting |= (PL_uid && (PL_euid != PL_uid || PL_egid != PL_gid));
}
PL_delaymagic = 0;
gimme = GIMME_V;
if (gimme == G_VOID)
SP = firstrelem - 1;
else if (gimme == G_SCALAR) {
dTARGET;
SP = firstrelem;
SETi(lastrelem - firstrelem + 1);
}
else {
if (ary || hash)
SP = lastrelem;
else
SP = firstrelem + (lastlelem - firstlelem);
lelem = firstlelem + (relem - firstrelem);
while (relem <= SP)
*relem++ = (lelem <= lastlelem) ? *lelem++ : &PL_sv_undef;
}
RETURN;
}
PP(pp_qr)
{
djSP;
register PMOP *pm = cPMOP;
SV *rv = sv_newmortal();
SV *sv = newSVrv(rv, "Regexp");
sv_magic(sv,(SV*)ReREFCNT_inc(pm->op_pmregexp),'r',0,0);
RETURNX(PUSHs(rv));
}
PP(pp_match)
{
djSP; dTARG;
register PMOP *pm = cPMOP;
register char *t;
register char *s;
char *strend;
I32 global;
I32 safebase;
char *truebase;
register REGEXP *rx = pm->op_pmregexp;
bool rxtainted;
I32 gimme = GIMME;
STRLEN len;
I32 minmatch = 0;
I32 oldsave = PL_savestack_ix;
I32 update_minmatch = 1;
SV *screamer;
if (PL_op->op_flags & OPf_STACKED)
TARG = POPs;
else {
TARG = DEFSV;
EXTEND(SP,1);
}
PUTBACK; /* EVAL blocks need stack_sp. */
s = SvPV(TARG, len);
strend = s + len;
if (!s)
DIE("panic: do_match");
rxtainted = ((pm->op_pmdynflags & PMdf_TAINTED) ||
(PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
TAINT_NOT;
if (pm->op_pmdynflags & PMdf_USED) {
failure:
if (gimme == G_ARRAY)
RETURN;
RETPUSHNO;
}
if (!rx->prelen && PL_curpm) {
pm = PL_curpm;
rx = pm->op_pmregexp;
}
if (rx->minlen > len) goto failure;
screamer = ( (SvSCREAM(TARG) && rx->check_substr
&& SvTYPE(rx->check_substr) == SVt_PVBM
&& SvVALID(rx->check_substr))
? TARG : Nullsv);
truebase = t = s;
if (global = pm->op_pmflags & PMf_GLOBAL) {
rx->startp[0] = 0;
if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
MAGIC* mg = mg_find(TARG, 'g');
if (mg && mg->mg_len >= 0) {
rx->endp[0] = rx->startp[0] = s + mg->mg_len;
minmatch = (mg->mg_flags & MGf_MINMATCH);
update_minmatch = 0;
}
}
}
safebase = (((gimme == G_ARRAY) || global || !rx->nparens)
&& !PL_sawampersand);
safebase = safebase ? 0 : REXEC_COPY_STR ;
if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
SAVEINT(PL_multiline);
PL_multiline = pm->op_pmflags & PMf_MULTILINE;
}
play_it_again:
if (global && rx->startp[0]) {
t = s = rx->endp[0];
if ((s + rx->minlen) > strend)
goto nope;
if (update_minmatch++)
minmatch = (s == rx->startp[0]);
}
if (rx->check_substr) {
if (!(rx->reganch & ROPT_NOSCAN)) { /* Floating checkstring. */
if ( screamer ) {
I32 p = -1;
if (PL_screamfirst[BmRARE(rx->check_substr)] < 0)
goto nope;
else if (!(s = screaminstr(TARG, rx->check_substr,
rx->check_offset_min, 0, &p, 0)))
goto nope;
else if ((rx->reganch & ROPT_CHECK_ALL)
&& !PL_sawampersand && !SvTAIL(rx->check_substr))
goto yup;
}
else if (!(s = fbm_instr((unsigned char*)s + rx->check_offset_min,
(unsigned char*)strend,
rx->check_substr, 0)))
goto nope;
else if ((rx->reganch & ROPT_CHECK_ALL) && !PL_sawampersand)
goto yup;
if (s && rx->check_offset_max < s - t) {
++BmUSEFUL(rx->check_substr);
s -= rx->check_offset_max;
}
else
s = t;
}
/* Now checkstring is fixed, i.e. at fixed offset from the
beginning of match, and the match is anchored at s. */
else if (!PL_multiline) { /* Anchored near beginning of string. */
I32 slen;
if (*SvPVX(rx->check_substr) != s[rx->check_offset_min]
|| ((slen = SvCUR(rx->check_substr)) > 1
&& memNE(SvPVX(rx->check_substr),
s + rx->check_offset_min, slen)))
goto nope;
}
if (!rx->naughty && --BmUSEFUL(rx->check_substr) < 0
&& rx->check_substr == rx->float_substr) {
SvREFCNT_dec(rx->check_substr);
rx->check_substr = Nullsv; /* opt is being useless */
rx->float_substr = Nullsv;
}
}
if (CALLREGEXEC(rx, s, strend, truebase, minmatch,
screamer, NULL, safebase))
{
PL_curpm = pm;
if (pm->op_pmflags & PMf_ONCE)
pm->op_pmdynflags |= PMdf_USED;
goto gotcha;
}
else
goto ret_no;
/*NOTREACHED*/
gotcha:
if (rxtainted)
RX_MATCH_TAINTED_on(rx);
TAINT_IF(RX_MATCH_TAINTED(rx));
if (gimme == G_ARRAY) {
I32 iters, i, len;
iters = rx->nparens;
if (global && !iters)
i = 1;
else
i = 0;
SPAGAIN; /* EVAL blocks could move the stack. */
EXTEND(SP, iters + i);
EXTEND_MORTAL(iters + i);
for (i = !i; i <= iters; i++) {
PUSHs(sv_newmortal());
/*SUPPRESS 560*/
if ((s = rx->startp[i]) && rx->endp[i] ) {
len = rx->endp[i] - s;
sv_setpvn(*SP, s, len);
}
}
if (global) {
truebase = rx->subbeg;
strend = rx->subend;
if (rx->startp[0] && rx->startp[0] == rx->endp[0])
++rx->endp[0];
PUTBACK; /* EVAL blocks may use stack */
goto play_it_again;
}
else if (!iters)
XPUSHs(&PL_sv_yes);
LEAVE_SCOPE(oldsave);
RETURN;
}
else {
if (global) {
MAGIC* mg = 0;
if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG))
mg = mg_find(TARG, 'g');
if (!mg) {
sv_magic(TARG, (SV*)0, 'g', Nullch, 0);
mg = mg_find(TARG, 'g');
}
if (rx->startp[0]) {
mg->mg_len = rx->endp[0] - rx->subbeg;
if (rx->startp[0] == rx->endp[0])
mg->mg_flags |= MGf_MINMATCH;
else
mg->mg_flags &= ~MGf_MINMATCH;
}
}
LEAVE_SCOPE(oldsave);
RETPUSHYES;
}
yup: /* Confirmed by check_substr */
if (rxtainted)
RX_MATCH_TAINTED_on(rx);
TAINT_IF(RX_MATCH_TAINTED(rx));
++BmUSEFUL(rx->check_substr);
PL_curpm = pm;
if (pm->op_pmflags & PMf_ONCE)
pm->op_pmdynflags |= PMdf_USED;
Safefree(rx->subbase);
rx->subbase = Nullch;