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-rw-r--r--contrib/perl5/pp_hot.c2535
1 files changed, 2535 insertions, 0 deletions
diff --git a/contrib/perl5/pp_hot.c b/contrib/perl5/pp_hot.c
new file mode 100644
index 000000000000..e82c0957cab0
--- /dev/null
+++ b/contrib/perl5/pp_hot.c
@@ -0,0 +1,2535 @@
+/* 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;
+ if (global) {
+ rx->subbeg = truebase;
+ rx->subend = strend;
+ rx->startp[0] = s;
+ rx->endp[0] = s + SvCUR(rx->check_substr);
+ goto gotcha;
+ }
+ if (PL_sawampersand) {
+ char *tmps;
+
+ tmps = rx->subbase = savepvn(t, strend-t);
+ rx->subbeg = tmps;
+ rx->subend = tmps + (strend-t);
+ tmps = rx->startp[0] = tmps + (s - t);
+ rx->endp[0] = tmps + SvCUR(rx->check_substr);
+ }
+ LEAVE_SCOPE(oldsave);
+ RETPUSHYES;
+
+nope:
+ if (rx->check_substr)
+ ++BmUSEFUL(rx->check_substr);
+
+ret_no:
+ if (global && !(pm->op_pmflags & PMf_CONTINUE)) {
+ if (SvTYPE(TARG) >= SVt_PVMG && SvMAGIC(TARG)) {
+ MAGIC* mg = mg_find(TARG, 'g');
+ if (mg)
+ mg->mg_len = -1;
+ }
+ }
+ LEAVE_SCOPE(oldsave);
+ if (gimme == G_ARRAY)
+ RETURN;
+ RETPUSHNO;
+}
+
+OP *
+do_readline(void)
+{
+ dSP; dTARGETSTACKED;
+ register SV *sv;
+ STRLEN tmplen = 0;
+ STRLEN offset;
+ PerlIO *fp;
+ register IO *io = GvIO(PL_last_in_gv);
+ register I32 type = PL_op->op_type;
+ I32 gimme = GIMME_V;
+ MAGIC *mg;
+
+ if (SvRMAGICAL(PL_last_in_gv) && (mg = mg_find((SV*)PL_last_in_gv, 'q'))) {
+ PUSHMARK(SP);
+ XPUSHs(mg->mg_obj);
+ PUTBACK;
+ ENTER;
+ perl_call_method("READLINE", gimme);
+ LEAVE;
+ SPAGAIN;
+ if (gimme == G_SCALAR)
+ SvSetMagicSV_nosteal(TARG, TOPs);
+ RETURN;
+ }
+ fp = Nullfp;
+ if (io) {
+ fp = IoIFP(io);
+ if (!fp) {
+ if (IoFLAGS(io) & IOf_ARGV) {
+ if (IoFLAGS(io) & IOf_START) {
+ IoFLAGS(io) &= ~IOf_START;
+ IoLINES(io) = 0;
+ if (av_len(GvAVn(PL_last_in_gv)) < 0) {
+ do_open(PL_last_in_gv,"-",1,FALSE,O_RDONLY,0,Nullfp);
+ sv_setpvn(GvSV(PL_last_in_gv), "-", 1);
+ SvSETMAGIC(GvSV(PL_last_in_gv));
+ fp = IoIFP(io);
+ goto have_fp;
+ }
+ }
+ fp = nextargv(PL_last_in_gv);
+ if (!fp) { /* Note: fp != IoIFP(io) */
+ (void)do_close(PL_last_in_gv, FALSE); /* now it does*/
+ IoFLAGS(io) |= IOf_START;
+ }
+ }
+ else if (type == OP_GLOB) {
+ SV *tmpcmd = NEWSV(55, 0);
+ SV *tmpglob = POPs;
+ ENTER;
+ SAVEFREESV(tmpcmd);
+#ifdef VMS /* expand the wildcards right here, rather than opening a pipe, */
+ /* since spawning off a process is a real performance hit */
+ {
+#include <descrip.h>
+#include <lib$routines.h>
+#include <nam.h>
+#include <rmsdef.h>
+ char rslt[NAM$C_MAXRSS+1+sizeof(unsigned short int)] = {'\0','\0'};
+ char vmsspec[NAM$C_MAXRSS+1];
+ char *rstr = rslt + sizeof(unsigned short int), *begin, *end, *cp;
+ char tmpfnam[L_tmpnam] = "SYS$SCRATCH:";
+ $DESCRIPTOR(dfltdsc,"SYS$DISK:[]*.*;");
+ PerlIO *tmpfp;
+ STRLEN i;
+ struct dsc$descriptor_s wilddsc
+ = {0, DSC$K_DTYPE_T, DSC$K_CLASS_S, 0};
+ struct dsc$descriptor_vs rsdsc
+ = {sizeof rslt, DSC$K_DTYPE_VT, DSC$K_CLASS_VS, rslt};
+ unsigned long int cxt = 0, sts = 0, ok = 1, hasdir = 0, hasver = 0, isunix = 0;
+
+ /* We could find out if there's an explicit dev/dir or version
+ by peeking into lib$find_file's internal context at
+ ((struct NAM *)((struct FAB *)cxt)->fab$l_nam)->nam$l_fnb
+ but that's unsupported, so I don't want to do it now and
+ have it bite someone in the future. */
+ strcat(tmpfnam,PerlLIO_tmpnam(NULL));
+ cp = SvPV(tmpglob,i);
+ for (; i; i--) {
+ if (cp[i] == ';') hasver = 1;
+ if (cp[i] == '.') {
+ if (sts) hasver = 1;
+ else sts = 1;
+ }
+ if (cp[i] == '/') {
+ hasdir = isunix = 1;
+ break;
+ }
+ if (cp[i] == ']' || cp[i] == '>' || cp[i] == ':') {
+ hasdir = 1;
+ break;
+ }
+ }
+ if ((tmpfp = PerlIO_open(tmpfnam,"w+","fop=dlt")) != NULL) {
+ Stat_t st;
+ if (!PerlLIO_stat(SvPVX(tmpglob),&st) && S_ISDIR(st.st_mode))
+ ok = ((wilddsc.dsc$a_pointer = tovmspath(SvPVX(tmpglob),vmsspec)) != NULL);
+ else ok = ((wilddsc.dsc$a_pointer = tovmsspec(SvPVX(tmpglob),vmsspec)) != NULL);
+ if (ok) wilddsc.dsc$w_length = (unsigned short int) strlen(wilddsc.dsc$a_pointer);
+ while (ok && ((sts = lib$find_file(&wilddsc,&rsdsc,&cxt,
+ &dfltdsc,NULL,NULL,NULL))&1)) {
+ end = rstr + (unsigned long int) *rslt;
+ if (!hasver) while (*end != ';') end--;
+ *(end++) = '\n'; *end = '\0';
+ for (cp = rstr; *cp; cp++) *cp = _tolower(*cp);
+ if (hasdir) {
+ if (isunix) trim_unixpath(rstr,SvPVX(tmpglob),1);
+ begin = rstr;
+ }
+ else {
+ begin = end;
+ while (*(--begin) != ']' && *begin != '>') ;
+ ++begin;
+ }
+ ok = (PerlIO_puts(tmpfp,begin) != EOF);
+ }
+ if (cxt) (void)lib$find_file_end(&cxt);
+ if (ok && sts != RMS$_NMF &&
+ sts != RMS$_DNF && sts != RMS$_FNF) ok = 0;
+ if (!ok) {
+ if (!(sts & 1)) {
+ SETERRNO((sts == RMS$_SYN ? EINVAL : EVMSERR),sts);
+ }
+ PerlIO_close(tmpfp);
+ fp = NULL;
+ }
+ else {
+ PerlIO_rewind(tmpfp);
+ IoTYPE(io) = '<';
+ IoIFP(io) = fp = tmpfp;
+ IoFLAGS(io) &= ~IOf_UNTAINT; /* maybe redundant */
+ }
+ }
+ }
+#else /* !VMS */
+#ifdef DOSISH
+#ifdef OS2
+ sv_setpv(tmpcmd, "for a in ");
+ sv_catsv(tmpcmd, tmpglob);
+ sv_catpv(tmpcmd, "; do echo \"$a\\0\\c\"; done |");
+#else
+#ifdef DJGPP
+ sv_setpv(tmpcmd, "/dev/dosglob/"); /* File System Extension */
+ sv_catsv(tmpcmd, tmpglob);
+#else
+ sv_setpv(tmpcmd, "perlglob ");
+ sv_catsv(tmpcmd, tmpglob);
+ sv_catpv(tmpcmd, " |");
+#endif /* !DJGPP */
+#endif /* !OS2 */
+#else /* !DOSISH */
+#if defined(CSH)
+ sv_setpvn(tmpcmd, PL_cshname, PL_cshlen);
+ sv_catpv(tmpcmd, " -cf 'set nonomatch; glob ");
+ sv_catsv(tmpcmd, tmpglob);
+ sv_catpv(tmpcmd, "' 2>/dev/null |");
+#else
+ sv_setpv(tmpcmd, "echo ");
+ sv_catsv(tmpcmd, tmpglob);
+#if 'z' - 'a' == 25
+ sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\012\\012\\012\\012'|");
+#else
+ sv_catpv(tmpcmd, "|tr -s ' \t\f\r' '\\n\\n\\n\\n'|");
+#endif
+#endif /* !CSH */
+#endif /* !DOSISH */
+ (void)do_open(PL_last_in_gv, SvPVX(tmpcmd), SvCUR(tmpcmd),
+ FALSE, O_RDONLY, 0, Nullfp);
+ fp = IoIFP(io);
+#endif /* !VMS */
+ LEAVE;
+ }
+ }
+ else if (type == OP_GLOB)
+ SP--;
+ }
+ if (!fp) {
+ if (PL_dowarn && io && !(IoFLAGS(io) & IOf_START))
+ warn("Read on closed filehandle <%s>", GvENAME(PL_last_in_gv));
+ if (gimme == G_SCALAR) {
+ (void)SvOK_off(TARG);
+ PUSHTARG;
+ }
+ RETURN;
+ }
+ have_fp:
+ if (gimme == G_SCALAR) {
+ sv = TARG;
+ if (SvROK(sv))
+ sv_unref(sv);
+ (void)SvUPGRADE(sv, SVt_PV);
+ tmplen = SvLEN(sv); /* remember if already alloced */
+ if (!tmplen)
+ Sv_Grow(sv, 80); /* try short-buffering it */
+ if (type == OP_RCATLINE)
+ offset = SvCUR(sv);
+ else
+ offset = 0;
+ }
+ else {
+ sv = sv_2mortal(NEWSV(57, 80));
+ offset = 0;
+ }
+ for (;;) {
+ if (!sv_gets(sv, fp, offset)) {
+ PerlIO_clearerr(fp);
+ if (IoFLAGS(io) & IOf_ARGV) {
+ fp = nextargv(PL_last_in_gv);
+ if (fp)
+ continue;
+ (void)do_close(PL_last_in_gv, FALSE);
+ IoFLAGS(io) |= IOf_START;
+ }
+ else if (type == OP_GLOB) {
+ if (!do_close(PL_last_in_gv, FALSE))
+ warn("internal error: glob failed");
+ }
+ if (gimme == G_SCALAR) {
+ (void)SvOK_off(TARG);
+ PUSHTARG;
+ }
+ RETURN;
+ }
+ /* This should not be marked tainted if the fp is marked clean */
+ if (!(IoFLAGS(io) & IOf_UNTAINT)) {
+ TAINT;
+ SvTAINTED_on(sv);
+ }
+ IoLINES(io)++;
+ SvSETMAGIC(sv);
+ XPUSHs(sv);
+ if (type == OP_GLOB) {
+ char *tmps;
+
+ if (SvCUR(sv) > 0 && SvCUR(PL_rs) > 0) {
+ tmps = SvEND(sv) - 1;
+ if (*tmps == *SvPVX(PL_rs)) {
+ *tmps = '\0';
+ SvCUR(sv)--;
+ }
+ }
+ for (tmps = SvPVX(sv); *tmps; tmps++)
+ if (!isALPHA(*tmps) && !isDIGIT(*tmps) &&
+ strchr("$&*(){}[]'\";\\|?<>~`", *tmps))
+ break;
+ if (*tmps && PerlLIO_stat(SvPVX(sv), &PL_statbuf) < 0) {
+ (void)POPs; /* Unmatched wildcard? Chuck it... */
+ continue;
+ }
+ }
+ if (gimme == G_ARRAY) {
+ if (SvLEN(sv) - SvCUR(sv) > 20) {
+ SvLEN_set(sv, SvCUR(sv)+1);
+ Renew(SvPVX(sv), SvLEN(sv), char);
+ }
+ sv = sv_2mortal(NEWSV(58, 80));
+ continue;
+ }
+ else if (gimme == G_SCALAR && !tmplen && SvLEN(sv) - SvCUR(sv) > 80) {
+ /* try to reclaim a bit of scalar space (only on 1st alloc) */
+ if (SvCUR(sv) < 60)
+ SvLEN_set(sv, 80);
+ else
+ SvLEN_set(sv, SvCUR(sv)+40); /* allow some slop */
+ Renew(SvPVX(sv), SvLEN(sv), char);
+ }
+ RETURN;
+ }
+}
+
+PP(pp_enter)
+{
+ djSP;
+ register PERL_CONTEXT *cx;
+ I32 gimme = OP_GIMME(PL_op, -1);
+
+ if (gimme == -1) {
+ if (cxstack_ix >= 0)
+ gimme = cxstack[cxstack_ix].blk_gimme;
+ else
+ gimme = G_SCALAR;
+ }
+
+ ENTER;
+
+ SAVETMPS;
+ PUSHBLOCK(cx, CXt_BLOCK, SP);
+
+ RETURN;
+}
+
+PP(pp_helem)
+{
+ djSP;
+ HE* he;
+ SV **svp;
+ SV *keysv = POPs;
+ HV *hv = (HV*)POPs;
+ U32 lval = PL_op->op_flags & OPf_MOD;
+ U32 defer = PL_op->op_private & OPpLVAL_DEFER;
+ SV *sv;
+
+ if (SvTYPE(hv) == SVt_PVHV) {
+ he = hv_fetch_ent(hv, keysv, lval && !defer, 0);
+ svp = he ? &HeVAL(he) : 0;
+ }
+ else if (SvTYPE(hv) == SVt_PVAV) {
+ if (PL_op->op_private & OPpLVAL_INTRO)
+ DIE("Can't localize pseudo-hash element");
+ svp = avhv_fetch_ent((AV*)hv, keysv, lval && !defer, 0);
+ }
+ else {
+ RETPUSHUNDEF;
+ }
+ if (lval) {
+ if (!svp || *svp == &PL_sv_undef) {
+ SV* lv;
+ SV* key2;
+ if (!defer)
+ DIE(no_helem, SvPV(keysv, PL_na));
+ lv = sv_newmortal();
+ sv_upgrade(lv, SVt_PVLV);
+ LvTYPE(lv) = 'y';
+ sv_magic(lv, key2 = newSVsv(keysv), 'y', Nullch, 0);
+ SvREFCNT_dec(key2); /* sv_magic() increments refcount */
+ LvTARG(lv) = SvREFCNT_inc(hv);
+ LvTARGLEN(lv) = 1;
+ PUSHs(lv);
+ RETURN;
+ }
+ if (PL_op->op_private & OPpLVAL_INTRO) {
+ if (HvNAME(hv) && isGV(*svp))
+ save_gp((GV*)*svp, !(PL_op->op_flags & OPf_SPECIAL));
+ else
+ save_helem(hv, keysv, svp);
+ }
+ else if (PL_op->op_private & OPpDEREF)
+ vivify_ref(*svp, PL_op->op_private & OPpDEREF);
+ }
+ sv = (svp ? *svp : &PL_sv_undef);
+ /* This makes C<local $tied{foo} = $tied{foo}> possible.
+ * Pushing the magical RHS on to the stack is useless, since
+ * that magic is soon destined to be misled by the local(),
+ * and thus the later pp_sassign() will fail to mg_get() the
+ * old value. This should also cure problems with delayed
+ * mg_get()s. GSAR 98-07-03 */
+ if (!lval && SvGMAGICAL(sv))
+ sv = sv_mortalcopy(sv);
+ PUSHs(sv);
+ RETURN;
+}
+
+PP(pp_leave)
+{
+ djSP;
+ register PERL_CONTEXT *cx;
+ register SV **mark;
+ SV **newsp;
+ PMOP *newpm;
+ I32 gimme;
+
+ if (PL_op->op_flags & OPf_SPECIAL) {
+ cx = &cxstack[cxstack_ix];
+ cx->blk_oldpm = PL_curpm; /* fake block should preserve $1 et al */
+ }
+
+ POPBLOCK(cx,newpm);
+
+ gimme = OP_GIMME(PL_op, -1);
+ if (gimme == -1) {
+ if (cxstack_ix >= 0)
+ gimme = cxstack[cxstack_ix].blk_gimme;
+ else
+ gimme = G_SCALAR;
+ }
+
+ TAINT_NOT;
+ if (gimme == G_VOID)
+ SP = newsp;
+ else if (gimme == G_SCALAR) {
+ MARK = newsp + 1;
+ if (MARK <= SP)
+ if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
+ *MARK = TOPs;
+ else
+ *MARK = sv_mortalcopy(TOPs);
+ else {
+ MEXTEND(mark,0);
+ *MARK = &PL_sv_undef;
+ }
+ SP = MARK;
+ }
+ else if (gimme == G_ARRAY) {
+ /* in case LEAVE wipes old return values */
+ for (mark = newsp + 1; mark <= SP; mark++) {
+ if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
+ *mark = sv_mortalcopy(*mark);
+ TAINT_NOT; /* Each item is independent */
+ }
+ }
+ }
+ PL_curpm = newpm; /* Don't pop $1 et al till now */
+
+ LEAVE;
+
+ RETURN;
+}
+
+PP(pp_iter)
+{
+ djSP;
+ register PERL_CONTEXT *cx;
+ SV* sv;
+ AV* av;
+
+ EXTEND(SP, 1);
+ cx = &cxstack[cxstack_ix];
+ if (cx->cx_type != CXt_LOOP)
+ DIE("panic: pp_iter");
+
+ av = cx->blk_loop.iterary;
+ if (SvTYPE(av) != SVt_PVAV) {
+ /* iterate ($min .. $max) */
+ if (cx->blk_loop.iterlval) {
+ /* string increment */
+ register SV* cur = cx->blk_loop.iterlval;
+ STRLEN maxlen;
+ char *max = SvPV((SV*)av, maxlen);
+ if (!SvNIOK(cur) && SvCUR(cur) <= maxlen) {
+#ifndef USE_THREADS /* don't risk potential race */
+ if (SvREFCNT(*cx->blk_loop.itervar) == 1
+ && !SvMAGICAL(*cx->blk_loop.itervar))
+ {
+ /* safe to reuse old SV */
+ sv_setsv(*cx->blk_loop.itervar, cur);
+ }
+ else
+#endif
+ {
+ /* we need a fresh SV every time so that loop body sees a
+ * completely new SV for closures/references to work as
+ * they used to */
+ SvREFCNT_dec(*cx->blk_loop.itervar);
+ *cx->blk_loop.itervar = newSVsv(cur);
+ }
+ if (strEQ(SvPVX(cur), max))
+ sv_setiv(cur, 0); /* terminate next time */
+ else
+ sv_inc(cur);
+ RETPUSHYES;
+ }
+ RETPUSHNO;
+ }
+ /* integer increment */
+ if (cx->blk_loop.iterix > cx->blk_loop.itermax)
+ RETPUSHNO;
+
+#ifndef USE_THREADS /* don't risk potential race */
+ if (SvREFCNT(*cx->blk_loop.itervar) == 1
+ && !SvMAGICAL(*cx->blk_loop.itervar))
+ {
+ /* safe to reuse old SV */
+ sv_setiv(*cx->blk_loop.itervar, cx->blk_loop.iterix++);
+ }
+ else
+#endif
+ {
+ /* we need a fresh SV every time so that loop body sees a
+ * completely new SV for closures/references to work as they
+ * used to */
+ SvREFCNT_dec(*cx->blk_loop.itervar);
+ *cx->blk_loop.itervar = newSViv(cx->blk_loop.iterix++);
+ }
+ RETPUSHYES;
+ }
+
+ /* iterate array */
+ if (cx->blk_loop.iterix >= (av == PL_curstack ? cx->blk_oldsp : AvFILL(av)))
+ RETPUSHNO;
+
+ SvREFCNT_dec(*cx->blk_loop.itervar);
+
+ if (sv = (SvMAGICAL(av))
+ ? *av_fetch(av, ++cx->blk_loop.iterix, FALSE)
+ : AvARRAY(av)[++cx->blk_loop.iterix])
+ SvTEMP_off(sv);
+ else
+ sv = &PL_sv_undef;
+ if (av != PL_curstack && SvIMMORTAL(sv)) {
+ SV *lv = cx->blk_loop.iterlval;
+ if (lv && SvREFCNT(lv) > 1) {
+ SvREFCNT_dec(lv);
+ lv = Nullsv;
+ }
+ if (lv)
+ SvREFCNT_dec(LvTARG(lv));
+ else {
+ lv = cx->blk_loop.iterlval = NEWSV(26, 0);
+ sv_upgrade(lv, SVt_PVLV);
+ LvTYPE(lv) = 'y';
+ sv_magic(lv, Nullsv, 'y', Nullch, 0);
+ }
+ LvTARG(lv) = SvREFCNT_inc(av);
+ LvTARGOFF(lv) = cx->blk_loop.iterix;
+ LvTARGLEN(lv) = (UV) -1;
+ sv = (SV*)lv;
+ }
+
+ *cx->blk_loop.itervar = SvREFCNT_inc(sv);
+ RETPUSHYES;
+}
+
+PP(pp_subst)
+{
+ djSP; dTARG;
+ register PMOP *pm = cPMOP;
+ PMOP *rpm = pm;
+ register SV *dstr;
+ register char *s;
+ char *strend;
+ register char *m;
+ char *c;
+ register char *d;
+ STRLEN clen;
+ I32 iters = 0;
+ I32 maxiters;
+ register I32 i;
+ bool once;
+ bool rxtainted;
+ char *orig;
+ I32 safebase;
+ register REGEXP *rx = pm->op_pmregexp;
+ STRLEN len;
+ int force_on_match = 0;
+ I32 oldsave = PL_savestack_ix;
+ I32 update_minmatch = 1;
+ SV *screamer;
+
+ /* known replacement string? */
+ dstr = (pm->op_pmflags & PMf_CONST) ? POPs : Nullsv;
+ if (PL_op->op_flags & OPf_STACKED)
+ TARG = POPs;
+ else {
+ TARG = DEFSV;
+ EXTEND(SP,1);
+ }
+ if (SvREADONLY(TARG)
+ || (SvTYPE(TARG) > SVt_PVLV
+ && !(SvTYPE(TARG) == SVt_PVGV && SvFAKE(TARG))))
+ croak(no_modify);
+ PUTBACK;
+
+ s = SvPV(TARG, len);
+ if (!SvPOKp(TARG) || SvTYPE(TARG) == SVt_PVGV)
+ force_on_match = 1;
+ rxtainted = ((pm->op_pmdynflags & PMdf_TAINTED) ||
+ (PL_tainted && (pm->op_pmflags & PMf_RETAINT)));
+ if (PL_tainted)
+ rxtainted |= 2;
+ TAINT_NOT;
+
+ force_it:
+ if (!pm || !s)
+ DIE("panic: do_subst");
+
+ strend = s + len;
+ maxiters = 2*(strend - s) + 10; /* We can match twice at each
+ position, once with zero-length,
+ second time with non-zero. */
+
+ if (!rx->prelen && PL_curpm) {
+ pm = PL_curpm;
+ rx = pm->op_pmregexp;
+ }
+ screamer = ( (SvSCREAM(TARG) && rx->check_substr
+ && SvTYPE(rx->check_substr) == SVt_PVBM
+ && SvVALID(rx->check_substr))
+ ? TARG : Nullsv);
+ safebase = (!rx->nparens && !PL_sawampersand) ? 0 : REXEC_COPY_STR;
+ if (pm->op_pmflags & (PMf_MULTILINE|PMf_SINGLELINE)) {
+ SAVEINT(PL_multiline);
+ PL_multiline = pm->op_pmflags & PMf_MULTILINE;
+ }
+ orig = m = s;
+ if (rx->check_substr) {
+ if (!(rx->reganch & ROPT_NOSCAN)) { /* It floats. */
+ 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 (!(s = fbm_instr((unsigned char*)s + rx->check_offset_min,
+ (unsigned char*)strend,
+ rx->check_substr, 0)))
+ goto nope;
+ if (s && rx->check_offset_max < s - m) {
+ ++BmUSEFUL(rx->check_substr);
+ s -= rx->check_offset_max;
+ }
+ else
+ s = m;
+ }
+ /* 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 at 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;
+ }
+ }
+
+ /* only replace once? */
+ once = !(rpm->op_pmflags & PMf_GLOBAL);
+
+ /* known replacement string? */
+ c = dstr ? SvPV(dstr, clen) : Nullch;
+
+ /* can do inplace substitution? */
+ if (c && clen <= rx->minlen && (once || !(safebase & REXEC_COPY_STR))
+ && !(rx->reganch & ROPT_LOOKBEHIND_SEEN)) {
+ if (!CALLREGEXEC(rx, s, strend, orig, 0, screamer, NULL, safebase)) {
+ SPAGAIN;
+ PUSHs(&PL_sv_no);
+ LEAVE_SCOPE(oldsave);
+ RETURN;
+ }
+ if (force_on_match) {
+ force_on_match = 0;
+ s = SvPV_force(TARG, len);
+ goto force_it;
+ }
+ d = s;
+ PL_curpm = pm;
+ SvSCREAM_off(TARG); /* disable possible screamer */
+ if (once) {
+ rxtainted |= RX_MATCH_TAINTED(rx);
+ if (rx->subbase) {
+ m = orig + (rx->startp[0] - rx->subbase);
+ d = orig + (rx->endp[0] - rx->subbase);
+ } else {
+ m = rx->startp[0];
+ d = rx->endp[0];
+ }
+ s = orig;
+ if (m - s > strend - d) { /* faster to shorten from end */
+ if (clen) {
+ Copy(c, m, clen, char);
+ m += clen;
+ }
+ i = strend - d;
+ if (i > 0) {
+ Move(d, m, i, char);
+ m += i;
+ }
+ *m = '\0';
+ SvCUR_set(TARG, m - s);
+ }
+ /*SUPPRESS 560*/
+ else if (i = m - s) { /* faster from front */
+ d -= clen;
+ m = d;
+ sv_chop(TARG, d-i);
+ s += i;
+ while (i--)
+ *--d = *--s;
+ if (clen)
+ Copy(c, m, clen, char);
+ }
+ else if (clen) {
+ d -= clen;
+ sv_chop(TARG, d);
+ Copy(c, d, clen, char);
+ }
+ else {
+ sv_chop(TARG, d);
+ }
+ TAINT_IF(rxtainted & 1);
+ SPAGAIN;
+ PUSHs(&PL_sv_yes);
+ }
+ else {
+ do {
+ if (iters++ > maxiters)
+ DIE("Substitution loop");
+ rxtainted |= RX_MATCH_TAINTED(rx);
+ m = rx->startp[0];
+ /*SUPPRESS 560*/
+ if (i = m - s) {
+ if (s != d)
+ Move(s, d, i, char);
+ d += i;
+ }
+ if (clen) {
+ Copy(c, d, clen, char);
+ d += clen;
+ }
+ s = rx->endp[0];
+ } while (CALLREGEXEC(rx, s, strend, orig, s == m,
+ Nullsv, NULL, 0)); /* don't match same null twice */
+ if (s != d) {
+ i = strend - s;
+ SvCUR_set(TARG, d - SvPVX(TARG) + i);
+ Move(s, d, i+1, char); /* include the NUL */
+ }
+ TAINT_IF(rxtainted & 1);
+ SPAGAIN;
+ PUSHs(sv_2mortal(newSViv((I32)iters)));
+ }
+ (void)SvPOK_only(TARG);
+ TAINT_IF(rxtainted);
+ if (SvSMAGICAL(TARG)) {
+ PUTBACK;
+ mg_set(TARG);
+ SPAGAIN;
+ }
+ SvTAINT(TARG);
+ LEAVE_SCOPE(oldsave);
+ RETURN;
+ }
+
+ if (CALLREGEXEC(rx, s, strend, orig, 0, screamer, NULL, safebase)) {
+ if (force_on_match) {
+ force_on_match = 0;
+ s = SvPV_force(TARG, len);
+ goto force_it;
+ }
+ rxtainted |= RX_MATCH_TAINTED(rx);
+ dstr = NEWSV(25, len);
+ sv_setpvn(dstr, m, s-m);
+ PL_curpm = pm;
+ if (!c) {
+ register PERL_CONTEXT *cx;
+ SPAGAIN;
+ PUSHSUBST(cx);
+ RETURNOP(cPMOP->op_pmreplroot);
+ }
+ do {
+ if (iters++ > maxiters)
+ DIE("Substitution loop");
+ rxtainted |= RX_MATCH_TAINTED(rx);
+ if (rx->subbase && rx->subbase != orig) {
+ m = s;
+ s = orig;
+ orig = rx->subbase;
+ s = orig + (m - s);
+ strend = s + (strend - m);
+ }
+ m = rx->startp[0];
+ sv_catpvn(dstr, s, m-s);
+ s = rx->endp[0];
+ if (clen)
+ sv_catpvn(dstr, c, clen);
+ if (once)
+ break;
+ } while (CALLREGEXEC(rx, s, strend, orig, s == m, Nullsv, NULL, safebase));
+ sv_catpvn(dstr, s, strend - s);
+
+ (void)SvOOK_off(TARG);
+ Safefree(SvPVX(TARG));
+ SvPVX(TARG) = SvPVX(dstr);
+ SvCUR_set(TARG, SvCUR(dstr));
+ SvLEN_set(TARG, SvLEN(dstr));
+ SvPVX(dstr) = 0;
+ sv_free(dstr);
+
+ TAINT_IF(rxtainted & 1);
+ SPAGAIN;
+ PUSHs(sv_2mortal(newSViv((I32)iters)));
+
+ (void)SvPOK_only(TARG);
+ TAINT_IF(rxtainted);
+ SvSETMAGIC(TARG);
+ SvTAINT(TARG);
+ LEAVE_SCOPE(oldsave);
+ RETURN;
+ }
+ goto ret_no;
+
+nope:
+ ++BmUSEFUL(rx->check_substr);
+
+ret_no:
+ SPAGAIN;
+ PUSHs(&PL_sv_no);
+ LEAVE_SCOPE(oldsave);
+ RETURN;
+}
+
+PP(pp_grepwhile)
+{
+ djSP;
+
+ if (SvTRUEx(POPs))
+ PL_stack_base[PL_markstack_ptr[-1]++] = PL_stack_base[*PL_markstack_ptr];
+ ++*PL_markstack_ptr;
+ LEAVE; /* exit inner scope */
+
+ /* All done yet? */
+ if (PL_stack_base + *PL_markstack_ptr > SP) {
+ I32 items;
+ I32 gimme = GIMME_V;
+
+ LEAVE; /* exit outer scope */
+ (void)POPMARK; /* pop src */
+ items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
+ (void)POPMARK; /* pop dst */
+ SP = PL_stack_base + POPMARK; /* pop original mark */
+ if (gimme == G_SCALAR) {
+ dTARGET;
+ XPUSHi(items);
+ }
+ else if (gimme == G_ARRAY)
+ SP += items;
+ RETURN;
+ }
+ else {
+ SV *src;
+
+ ENTER; /* enter inner scope */
+ SAVESPTR(PL_curpm);
+
+ src = PL_stack_base[*PL_markstack_ptr];
+ SvTEMP_off(src);
+ DEFSV = src;
+
+ RETURNOP(cLOGOP->op_other);
+ }
+}
+
+PP(pp_leavesub)
+{
+ djSP;
+ SV **mark;
+ SV **newsp;
+ PMOP *newpm;
+ I32 gimme;
+ register PERL_CONTEXT *cx;
+ struct block_sub cxsub;
+
+ POPBLOCK(cx,newpm);
+ POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */
+
+ TAINT_NOT;
+ if (gimme == G_SCALAR) {
+ MARK = newsp + 1;
+ if (MARK <= SP) {
+ if (cxsub.cv && CvDEPTH(cxsub.cv) > 1) {
+ if (SvTEMP(TOPs)) {
+ *MARK = SvREFCNT_inc(TOPs);
+ FREETMPS;
+ sv_2mortal(*MARK);
+ } else {
+ FREETMPS;
+ *MARK = sv_mortalcopy(TOPs);
+ }
+ } else
+ *MARK = SvTEMP(TOPs) ? TOPs : sv_mortalcopy(TOPs);
+ } else {
+ MEXTEND(MARK, 0);
+ *MARK = &PL_sv_undef;
+ }
+ SP = MARK;
+ }
+ else if (gimme == G_ARRAY) {
+ for (MARK = newsp + 1; MARK <= SP; MARK++) {
+ if (!SvTEMP(*MARK)) {
+ *MARK = sv_mortalcopy(*MARK);
+ TAINT_NOT; /* Each item is independent */
+ }
+ }
+ }
+ PUTBACK;
+
+ POPSUB2(); /* Stack values are safe: release CV and @_ ... */
+ PL_curpm = newpm; /* ... and pop $1 et al */
+
+ LEAVE;
+ return pop_return();
+}
+
+STATIC CV *
+get_db_sub(SV **svp, CV *cv)
+{
+ dTHR;
+ SV *dbsv = GvSV(PL_DBsub);
+
+ if (!PERLDB_SUB_NN) {
+ GV *gv = CvGV(cv);
+
+ save_item(dbsv);
+ if ( (CvFLAGS(cv) & (CVf_ANON | CVf_CLONED))
+ || strEQ(GvNAME(gv), "END")
+ || ((GvCV(gv) != cv) && /* Could be imported, and old sub redefined. */
+ !( (SvTYPE(*svp) == SVt_PVGV) && (GvCV((GV*)*svp) == cv)
+ && (gv = (GV*)*svp) ))) {
+ /* Use GV from the stack as a fallback. */
+ /* GV is potentially non-unique, or contain different CV. */
+ sv_setsv(dbsv, newRV((SV*)cv));
+ }
+ else {
+ gv_efullname3(dbsv, gv, Nullch);
+ }
+ }
+ else {
+ SvUPGRADE(dbsv, SVt_PVIV);
+ SvIOK_on(dbsv);
+ SAVEIV(SvIVX(dbsv));
+ SvIVX(dbsv) = (IV)cv; /* Do it the quickest way */
+ }
+
+ if (CvXSUB(cv))
+ PL_curcopdb = PL_curcop;
+ cv = GvCV(PL_DBsub);
+ return cv;
+}
+
+PP(pp_entersub)
+{
+ djSP; dPOPss;
+ GV *gv;
+ HV *stash;
+ register CV *cv;
+ register PERL_CONTEXT *cx;
+ I32 gimme;
+ bool hasargs = (PL_op->op_flags & OPf_STACKED) != 0;
+
+ if (!sv)
+ DIE("Not a CODE reference");
+ switch (SvTYPE(sv)) {
+ default:
+ if (!SvROK(sv)) {
+ char *sym;
+
+ if (sv == &PL_sv_yes) { /* unfound import, ignore */
+ if (hasargs)
+ SP = PL_stack_base + POPMARK;
+ RETURN;
+ }
+ if (SvGMAGICAL(sv)) {
+ mg_get(sv);
+ sym = SvPOKp(sv) ? SvPVX(sv) : Nullch;
+ }
+ else
+ sym = SvPV(sv, PL_na);
+ if (!sym)
+ DIE(no_usym, "a subroutine");
+ if (PL_op->op_private & HINT_STRICT_REFS)
+ DIE(no_symref, sym, "a subroutine");
+ cv = perl_get_cv(sym, TRUE);
+ break;
+ }
+ cv = (CV*)SvRV(sv);
+ if (SvTYPE(cv) == SVt_PVCV)
+ break;
+ /* FALL THROUGH */
+ case SVt_PVHV:
+ case SVt_PVAV:
+ DIE("Not a CODE reference");
+ case SVt_PVCV:
+ cv = (CV*)sv;
+ break;
+ case SVt_PVGV:
+ if (!(cv = GvCVu((GV*)sv)))
+ cv = sv_2cv(sv, &stash, &gv, TRUE);
+ break;
+ }
+
+ ENTER;
+ SAVETMPS;
+
+ retry:
+ if (!cv)
+ DIE("Not a CODE reference");
+
+ if (!CvROOT(cv) && !CvXSUB(cv)) {
+ GV* autogv;
+ SV* sub_name;
+
+ /* anonymous or undef'd function leaves us no recourse */
+ if (CvANON(cv) || !(gv = CvGV(cv)))
+ DIE("Undefined subroutine called");
+ /* autoloaded stub? */
+ if (cv != GvCV(gv)) {
+ cv = GvCV(gv);
+ goto retry;
+ }
+ /* should call AUTOLOAD now? */
+ if ((autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv), GvNAMELEN(gv),
+ FALSE)))
+ {
+ cv = GvCV(autogv);
+ goto retry;
+ }
+ /* sorry */
+ sub_name = sv_newmortal();
+ gv_efullname3(sub_name, gv, Nullch);
+ DIE("Undefined subroutine &%s called", SvPVX(sub_name));
+ }
+
+ gimme = GIMME_V;
+ if ((PL_op->op_private & OPpENTERSUB_DB) && GvCV(PL_DBsub) && !CvNODEBUG(cv))
+ cv = get_db_sub(&sv, cv);
+ if (!cv)
+ DIE("No DBsub routine");
+
+#ifdef USE_THREADS
+ /*
+ * First we need to check if the sub or method requires locking.
+ * If so, we gain a lock on the CV, the first argument or the
+ * stash (for static methods), as appropriate. This has to be
+ * inline because for FAKE_THREADS, COND_WAIT inlines code to
+ * reschedule by returning a new op.
+ */
+ MUTEX_LOCK(CvMUTEXP(cv));
+ if (CvFLAGS(cv) & CVf_LOCKED) {
+ MAGIC *mg;
+ if (CvFLAGS(cv) & CVf_METHOD) {
+ if (SP > PL_stack_base + TOPMARK)
+ sv = *(PL_stack_base + TOPMARK + 1);
+ else {
+ MUTEX_UNLOCK(CvMUTEXP(cv));
+ croak("no argument for locked method call");
+ }
+ if (SvROK(sv))
+ sv = SvRV(sv);
+ else {
+ STRLEN len;
+ char *stashname = SvPV(sv, len);
+ sv = (SV*)gv_stashpvn(stashname, len, TRUE);
+ }
+ }
+ else {
+ sv = (SV*)cv;
+ }
+ MUTEX_UNLOCK(CvMUTEXP(cv));
+ mg = condpair_magic(sv);
+ MUTEX_LOCK(MgMUTEXP(mg));
+ if (MgOWNER(mg) == thr)
+ MUTEX_UNLOCK(MgMUTEXP(mg));
+ else {
+ while (MgOWNER(mg))
+ COND_WAIT(MgOWNERCONDP(mg), MgMUTEXP(mg));
+ MgOWNER(mg) = thr;
+ DEBUG_S(PerlIO_printf(PerlIO_stderr(), "%p: pp_entersub lock %p\n",
+ thr, sv);)
+ MUTEX_UNLOCK(MgMUTEXP(mg));
+ SvREFCNT_inc(sv); /* Keep alive until magic_mutexfree */
+ save_destructor(unlock_condpair, sv);
+ }
+ MUTEX_LOCK(CvMUTEXP(cv));
+ }
+ /*
+ * Now we have permission to enter the sub, we must distinguish
+ * four cases. (0) It's an XSUB (in which case we don't care
+ * about ownership); (1) it's ours already (and we're recursing);
+ * (2) it's free (but we may already be using a cached clone);
+ * (3) another thread owns it. Case (1) is easy: we just use it.
+ * Case (2) means we look for a clone--if we have one, use it
+ * otherwise grab ownership of cv. Case (3) means we look for a
+ * clone (for non-XSUBs) and have to create one if we don't
+ * already have one.
+ * Why look for a clone in case (2) when we could just grab
+ * ownership of cv straight away? Well, we could be recursing,
+ * i.e. we originally tried to enter cv while another thread
+ * owned it (hence we used a clone) but it has been freed up
+ * and we're now recursing into it. It may or may not be "better"
+ * to use the clone but at least CvDEPTH can be trusted.
+ */
+ if (CvOWNER(cv) == thr || CvXSUB(cv))
+ MUTEX_UNLOCK(CvMUTEXP(cv));
+ else {
+ /* Case (2) or (3) */
+ SV **svp;
+
+ /*
+ * XXX Might it be better to release CvMUTEXP(cv) while we
+ * do the hv_fetch? We might find someone has pinched it
+ * when we look again, in which case we would be in case
+ * (3) instead of (2) so we'd have to clone. Would the fact
+ * that we released the mutex more quickly make up for this?
+ */
+ if (PL_threadnum &&
+ (svp = hv_fetch(thr->cvcache, (char *)cv, sizeof(cv), FALSE)))
+ {
+ /* We already have a clone to use */
+ MUTEX_UNLOCK(CvMUTEXP(cv));
+ cv = *(CV**)svp;
+ DEBUG_S(PerlIO_printf(PerlIO_stderr(),
+ "entersub: %p already has clone %p:%s\n",
+ thr, cv, SvPEEK((SV*)cv)));
+ CvOWNER(cv) = thr;
+ SvREFCNT_inc(cv);
+ if (CvDEPTH(cv) == 0)
+ SAVEDESTRUCTOR(unset_cvowner, (void*) cv);
+ }
+ else {
+ /* (2) => grab ownership of cv. (3) => make clone */
+ if (!CvOWNER(cv)) {
+ CvOWNER(cv) = thr;
+ SvREFCNT_inc(cv);
+ MUTEX_UNLOCK(CvMUTEXP(cv));
+ DEBUG_S(PerlIO_printf(PerlIO_stderr(),
+ "entersub: %p grabbing %p:%s in stash %s\n",
+ thr, cv, SvPEEK((SV*)cv), CvSTASH(cv) ?
+ HvNAME(CvSTASH(cv)) : "(none)"));
+ } else {
+ /* Make a new clone. */
+ CV *clonecv;
+ SvREFCNT_inc(cv); /* don't let it vanish from under us */
+ MUTEX_UNLOCK(CvMUTEXP(cv));
+ DEBUG_S((PerlIO_printf(PerlIO_stderr(),
+ "entersub: %p cloning %p:%s\n",
+ thr, cv, SvPEEK((SV*)cv))));
+ /*
+ * We're creating a new clone so there's no race
+ * between the original MUTEX_UNLOCK and the
+ * SvREFCNT_inc since no one will be trying to undef
+ * it out from underneath us. At least, I don't think
+ * there's a race...
+ */
+ clonecv = cv_clone(cv);
+ SvREFCNT_dec(cv); /* finished with this */
+ hv_store(thr->cvcache, (char*)cv, sizeof(cv), (SV*)clonecv,0);
+ CvOWNER(clonecv) = thr;
+ cv = clonecv;
+ SvREFCNT_inc(cv);
+ }
+ DEBUG_S(if (CvDEPTH(cv) != 0)
+ PerlIO_printf(PerlIO_stderr(), "depth %ld != 0\n",
+ CvDEPTH(cv)););
+ SAVEDESTRUCTOR(unset_cvowner, (void*) cv);
+ }
+ }
+#endif /* USE_THREADS */
+
+ if (CvXSUB(cv)) {
+ if (CvOLDSTYLE(cv)) {
+ I32 (*fp3)_((int,int,int));
+ dMARK;
+ register I32 items = SP - MARK;
+ /* We dont worry to copy from @_. */
+ while (SP > mark) {
+ SP[1] = SP[0];
+ SP--;
+ }
+ PL_stack_sp = mark + 1;
+ fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
+ items = (*fp3)(CvXSUBANY(cv).any_i32,
+ MARK - PL_stack_base + 1,
+ items);
+ PL_stack_sp = PL_stack_base + items;
+ }
+ else {
+ I32 markix = TOPMARK;
+
+ PUTBACK;
+
+ if (!hasargs) {
+ /* Need to copy @_ to stack. Alternative may be to
+ * switch stack to @_, and copy return values
+ * back. This would allow popping @_ in XSUB, e.g.. XXXX */
+ AV* av;
+ I32 items;
+#ifdef USE_THREADS
+ av = (AV*)PL_curpad[0];
+#else
+ av = GvAV(PL_defgv);
+#endif /* USE_THREADS */
+ items = AvFILLp(av) + 1; /* @_ is not tieable */
+
+ if (items) {
+ /* Mark is at the end of the stack. */
+ EXTEND(SP, items);
+ Copy(AvARRAY(av), SP + 1, items, SV*);
+ SP += items;
+ PUTBACK ;
+ }
+ }
+ if (PL_curcopdb) { /* We assume that the first
+ XSUB in &DB::sub is the
+ called one. */
+ SAVESPTR(PL_curcop);
+ PL_curcop = PL_curcopdb;
+ PL_curcopdb = NULL;
+ }
+ /* Do we need to open block here? XXXX */
+ (void)(*CvXSUB(cv))(cv _PERL_OBJECT_THIS);
+
+ /* Enforce some sanity in scalar context. */
+ if (gimme == G_SCALAR && ++markix != PL_stack_sp - PL_stack_base ) {
+ if (markix > PL_stack_sp - PL_stack_base)
+ *(PL_stack_base + markix) = &PL_sv_undef;
+ else
+ *(PL_stack_base + markix) = *PL_stack_sp;
+ PL_stack_sp = PL_stack_base + markix;
+ }
+ }
+ LEAVE;
+ return NORMAL;
+ }
+ else {
+ dMARK;
+ register I32 items = SP - MARK;
+ AV* padlist = CvPADLIST(cv);
+ SV** svp = AvARRAY(padlist);
+ push_return(PL_op->op_next);
+ PUSHBLOCK(cx, CXt_SUB, MARK);
+ PUSHSUB(cx);
+ CvDEPTH(cv)++;
+ if (CvDEPTH(cv) < 2)
+ (void)SvREFCNT_inc(cv);
+ else { /* save temporaries on recursion? */
+ if (CvDEPTH(cv) == 100 && PL_dowarn
+ && !(PERLDB_SUB && cv == GvCV(PL_DBsub)))
+ sub_crush_depth(cv);
+ if (CvDEPTH(cv) > AvFILLp(padlist)) {
+ AV *av;
+ AV *newpad = newAV();
+ SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
+ I32 ix = AvFILLp((AV*)svp[1]);
+ svp = AvARRAY(svp[0]);
+ for ( ;ix > 0; ix--) {
+ if (svp[ix] != &PL_sv_undef) {
+ char *name = SvPVX(svp[ix]);
+ if ((SvFLAGS(svp[ix]) & SVf_FAKE) /* outer lexical? */
+ || *name == '&') /* anonymous code? */
+ {
+ av_store(newpad, ix, SvREFCNT_inc(oldpad[ix]));
+ }
+ else { /* our own lexical */
+ if (*name == '@')
+ av_store(newpad, ix, sv = (SV*)newAV());
+ else if (*name == '%')
+ av_store(newpad, ix, sv = (SV*)newHV());
+ else
+ av_store(newpad, ix, sv = NEWSV(0,0));
+ SvPADMY_on(sv);
+ }
+ }
+ else {
+ av_store(newpad, ix, sv = NEWSV(0,0));
+ SvPADTMP_on(sv);
+ }
+ }
+ av = newAV(); /* will be @_ */
+ av_extend(av, 0);
+ av_store(newpad, 0, (SV*)av);
+ AvFLAGS(av) = AVf_REIFY;
+ av_store(padlist, CvDEPTH(cv), (SV*)newpad);
+ AvFILLp(padlist) = CvDEPTH(cv);
+ svp = AvARRAY(padlist);
+ }
+ }
+#ifdef USE_THREADS
+ if (!hasargs) {
+ AV* av = (AV*)PL_curpad[0];
+
+ items = AvFILLp(av) + 1;
+ if (items) {
+ /* Mark is at the end of the stack. */
+ EXTEND(SP, items);
+ Copy(AvARRAY(av), SP + 1, items, SV*);
+ SP += items;
+ PUTBACK ;
+ }
+ }
+#endif /* USE_THREADS */
+ SAVESPTR(PL_curpad);
+ PL_curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
+#ifndef USE_THREADS
+ if (hasargs)
+#endif /* USE_THREADS */
+ {
+ AV* av;
+ SV** ary;
+
+#if 0
+ DEBUG_S(PerlIO_printf(PerlIO_stderr(),
+ "%p entersub preparing @_\n", thr));
+#endif
+ av = (AV*)PL_curpad[0];
+ if (AvREAL(av)) {
+ av_clear(av);
+ AvREAL_off(av);
+ }
+#ifndef USE_THREADS
+ cx->blk_sub.savearray = GvAV(PL_defgv);
+ GvAV(PL_defgv) = (AV*)SvREFCNT_inc(av);
+#endif /* USE_THREADS */
+ cx->blk_sub.argarray = av;
+ ++MARK;
+
+ if (items > AvMAX(av) + 1) {
+ ary = AvALLOC(av);
+ if (AvARRAY(av) != ary) {
+ AvMAX(av) += AvARRAY(av) - AvALLOC(av);
+ SvPVX(av) = (char*)ary;
+ }
+ if (items > AvMAX(av) + 1) {
+ AvMAX(av) = items - 1;
+ Renew(ary,items,SV*);
+ AvALLOC(av) = ary;
+ SvPVX(av) = (char*)ary;
+ }
+ }
+ Copy(MARK,AvARRAY(av),items,SV*);
+ AvFILLp(av) = items - 1;
+
+ while (items--) {
+ if (*MARK)
+ SvTEMP_off(*MARK);
+ MARK++;
+ }
+ }
+#if 0
+ DEBUG_S(PerlIO_printf(PerlIO_stderr(),
+ "%p entersub returning %p\n", thr, CvSTART(cv)));
+#endif
+ RETURNOP(CvSTART(cv));
+ }
+}
+
+void
+sub_crush_depth(CV *cv)
+{
+ if (CvANON(cv))
+ warn("Deep recursion on anonymous subroutine");
+ else {
+ SV* tmpstr = sv_newmortal();
+ gv_efullname3(tmpstr, CvGV(cv), Nullch);
+ warn("Deep recursion on subroutine \"%s\"", SvPVX(tmpstr));
+ }
+}
+
+PP(pp_aelem)
+{
+ djSP;
+ SV** svp;
+ I32 elem = POPi;
+ AV* av = (AV*)POPs;
+ U32 lval = PL_op->op_flags & OPf_MOD;
+ U32 defer = (PL_op->op_private & OPpLVAL_DEFER) && (elem > AvFILL(av));
+ SV *sv;
+
+ if (elem > 0)
+ elem -= PL_curcop->cop_arybase;
+ if (SvTYPE(av) != SVt_PVAV)
+ RETPUSHUNDEF;
+ svp = av_fetch(av, elem, lval && !defer);
+ if (lval) {
+ if (!svp || *svp == &PL_sv_undef) {
+ SV* lv;
+ if (!defer)
+ DIE(no_aelem, elem);
+ lv = sv_newmortal();
+ sv_upgrade(lv, SVt_PVLV);
+ LvTYPE(lv) = 'y';
+ sv_magic(lv, Nullsv, 'y', Nullch, 0);
+ LvTARG(lv) = SvREFCNT_inc(av);
+ LvTARGOFF(lv) = elem;
+ LvTARGLEN(lv) = 1;
+ PUSHs(lv);
+ RETURN;
+ }
+ if (PL_op->op_private & OPpLVAL_INTRO)
+ save_aelem(av, elem, svp);
+ else if (PL_op->op_private & OPpDEREF)
+ vivify_ref(*svp, PL_op->op_private & OPpDEREF);
+ }
+ sv = (svp ? *svp : &PL_sv_undef);
+ if (!lval && SvGMAGICAL(sv)) /* see note in pp_helem() */
+ sv = sv_mortalcopy(sv);
+ PUSHs(sv);
+ RETURN;
+}
+
+void
+vivify_ref(SV *sv, U32 to_what)
+{
+ if (SvGMAGICAL(sv))
+ mg_get(sv);
+ if (!SvOK(sv)) {
+ if (SvREADONLY(sv))
+ croak(no_modify);
+ if (SvTYPE(sv) < SVt_RV)
+ sv_upgrade(sv, SVt_RV);
+ else if (SvTYPE(sv) >= SVt_PV) {
+ (void)SvOOK_off(sv);
+ Safefree(SvPVX(sv));
+ SvLEN(sv) = SvCUR(sv) = 0;
+ }
+ switch (to_what) {
+ case OPpDEREF_SV:
+ SvRV(sv) = NEWSV(355,0);
+ break;
+ case OPpDEREF_AV:
+ SvRV(sv) = (SV*)newAV();
+ break;
+ case OPpDEREF_HV:
+ SvRV(sv) = (SV*)newHV();
+ break;
+ }
+ SvROK_on(sv);
+ SvSETMAGIC(sv);
+ }
+}
+
+PP(pp_method)
+{
+ djSP;
+ SV* sv;
+ SV* ob;
+ GV* gv;
+ HV* stash;
+ char* name;
+ char* packname;
+ STRLEN packlen;
+
+ if (SvROK(TOPs)) {
+ sv = SvRV(TOPs);
+ if (SvTYPE(sv) == SVt_PVCV) {
+ SETs(sv);
+ RETURN;
+ }
+ }
+
+ name = SvPV(TOPs, PL_na);
+ sv = *(PL_stack_base + TOPMARK + 1);
+
+ if (SvGMAGICAL(sv))
+ mg_get(sv);
+ if (SvROK(sv))
+ ob = (SV*)SvRV(sv);
+ else {
+ GV* iogv;
+
+ packname = Nullch;
+ if (!SvOK(sv) ||
+ !(packname = SvPV(sv, packlen)) ||
+ !(iogv = gv_fetchpv(packname, FALSE, SVt_PVIO)) ||
+ !(ob=(SV*)GvIO(iogv)))
+ {
+ if (!packname || !isIDFIRST(*packname))
+ DIE("Can't call method \"%s\" %s", name,
+ SvOK(sv)? "without a package or object reference"
+ : "on an undefined value");
+ stash = gv_stashpvn(packname, packlen, TRUE);
+ goto fetch;
+ }
+ *(PL_stack_base + TOPMARK + 1) = sv_2mortal(newRV((SV*)iogv));
+ }
+
+ if (!ob || !SvOBJECT(ob))
+ DIE("Can't call method \"%s\" on unblessed reference", name);
+
+ stash = SvSTASH(ob);
+
+ fetch:
+ gv = gv_fetchmethod(stash, name);
+ if (!gv) {
+ char* leaf = name;
+ char* sep = Nullch;
+ char* p;
+
+ for (p = name; *p; p++) {
+ if (*p == '\'')
+ sep = p, leaf = p + 1;
+ else if (*p == ':' && *(p + 1) == ':')
+ sep = p, leaf = p + 2;
+ }
+ if (!sep || ((sep - name) == 5 && strnEQ(name, "SUPER", 5))) {
+ packname = HvNAME(sep ? PL_curcop->cop_stash : stash);
+ packlen = strlen(packname);
+ }
+ else {
+ packname = name;
+ packlen = sep - name;
+ }
+ DIE("Can't locate object method \"%s\" via package \"%.*s\"",
+ leaf, (int)packlen, packname);
+ }
+ SETs(isGV(gv) ? (SV*)GvCV(gv) : (SV*)gv);
+ RETURN;
+}
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-27 10:24:46 +0000