3 * Copyright (c) 1991-1999, Larry Wall
5 * You may distribute under the terms of either the GNU General Public
6 * License or the Artistic License, as specified in the README file.
11 * Now far ahead the Road has gone,
12 * And I must follow, if I can,
13 * Pursuing it with eager feet,
14 * Until it joins some larger way
15 * Where many paths and errands meet.
16 * And whither then? I cannot say.
20 #define PERL_IN_PP_CTL_C
24 #define WORD_ALIGN sizeof(U16)
27 #define DOCATCH(o) ((CATCH_GET == TRUE) ? docatch(o) : (o))
29 static I32 sortcv(pTHXo_ SV *a, SV *b);
30 static I32 sv_ncmp(pTHXo_ SV *a, SV *b);
31 static I32 sv_i_ncmp(pTHXo_ SV *a, SV *b);
32 static I32 amagic_ncmp(pTHXo_ SV *a, SV *b);
33 static I32 amagic_i_ncmp(pTHXo_ SV *a, SV *b);
34 static I32 amagic_cmp(pTHXo_ SV *a, SV *b);
35 static I32 amagic_cmp_locale(pTHXo_ SV *a, SV *b);
36 static I32 run_user_filter(pTHXo_ int idx, SV *buf_sv, int maxlen);
39 static I32 sv_cmp_static(pTHXo_ SV *a, SV *b);
40 static I32 sv_cmp_locale_static(pTHXo_ SV *a, SV *b);
42 #define sv_cmp_static Perl_sv_cmp
43 #define sv_cmp_locale_static Perl_sv_cmp_locale
52 cxix = dopoptosub(cxstack_ix);
56 switch (cxstack[cxix].blk_gimme) {
73 /* XXXX Should store the old value to allow for tie/overload - and
74 restore in regcomp, where marked with XXXX. */
82 register PMOP *pm = (PMOP*)cLOGOP->op_other;
86 MAGIC *mg = Null(MAGIC*);
90 SV *sv = SvRV(tmpstr);
92 mg = mg_find(sv, 'r');
95 regexp *re = (regexp *)mg->mg_obj;
96 ReREFCNT_dec(pm->op_pmregexp);
97 pm->op_pmregexp = ReREFCNT_inc(re);
100 t = SvPV(tmpstr, len);
102 /* Check against the last compiled regexp. */
103 if (!pm->op_pmregexp || !pm->op_pmregexp->precomp ||
104 pm->op_pmregexp->prelen != len ||
105 memNE(pm->op_pmregexp->precomp, t, len))
107 if (pm->op_pmregexp) {
108 ReREFCNT_dec(pm->op_pmregexp);
109 pm->op_pmregexp = Null(REGEXP*); /* crucial if regcomp aborts */
111 if (PL_op->op_flags & OPf_SPECIAL)
112 PL_reginterp_cnt = I32_MAX; /* Mark as safe. */
114 pm->op_pmflags = pm->op_pmpermflags; /* reset case sensitivity */
115 pm->op_pmregexp = CALLREGCOMP(aTHX_ t, t + len, pm);
116 PL_reginterp_cnt = 0; /* XXXX Be extra paranoid - needed
117 inside tie/overload accessors. */
121 #ifndef INCOMPLETE_TAINTS
124 pm->op_pmdynflags |= PMdf_TAINTED;
126 pm->op_pmdynflags &= ~PMdf_TAINTED;
130 if (!pm->op_pmregexp->prelen && PL_curpm)
132 else if (strEQ("\\s+", pm->op_pmregexp->precomp))
133 pm->op_pmflags |= PMf_WHITE;
135 if (pm->op_pmflags & PMf_KEEP) {
136 pm->op_private &= ~OPpRUNTIME; /* no point compiling again */
137 cLOGOP->op_first->op_next = PL_op->op_next;
145 register PMOP *pm = (PMOP*) cLOGOP->op_other;
146 register PERL_CONTEXT *cx = &cxstack[cxstack_ix];
147 register SV *dstr = cx->sb_dstr;
148 register char *s = cx->sb_s;
149 register char *m = cx->sb_m;
150 char *orig = cx->sb_orig;
151 register REGEXP *rx = cx->sb_rx;
153 rxres_restore(&cx->sb_rxres, rx);
155 if (cx->sb_iters++) {
156 if (cx->sb_iters > cx->sb_maxiters)
157 DIE(aTHX_ "Substitution loop");
159 if (!(cx->sb_rxtainted & 2) && SvTAINTED(TOPs))
160 cx->sb_rxtainted |= 2;
161 sv_catsv(dstr, POPs);
164 if (cx->sb_once || !CALLREGEXEC(aTHX_ rx, s, cx->sb_strend, orig,
165 s == m, cx->sb_targ, NULL,
166 ((cx->sb_rflags & REXEC_COPY_STR)
167 ? (REXEC_IGNOREPOS|REXEC_NOT_FIRST)
168 : (REXEC_COPY_STR|REXEC_IGNOREPOS|REXEC_NOT_FIRST))))
170 SV *targ = cx->sb_targ;
171 sv_catpvn(dstr, s, cx->sb_strend - s);
173 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
175 (void)SvOOK_off(targ);
176 Safefree(SvPVX(targ));
177 SvPVX(targ) = SvPVX(dstr);
178 SvCUR_set(targ, SvCUR(dstr));
179 SvLEN_set(targ, SvLEN(dstr));
183 TAINT_IF(cx->sb_rxtainted & 1);
184 PUSHs(sv_2mortal(newSViv((I32)cx->sb_iters - 1)));
186 (void)SvPOK_only(targ);
187 TAINT_IF(cx->sb_rxtainted);
191 LEAVE_SCOPE(cx->sb_oldsave);
193 RETURNOP(pm->op_next);
196 if (RX_MATCH_COPIED(rx) && rx->subbeg != orig) {
199 cx->sb_orig = orig = rx->subbeg;
201 cx->sb_strend = s + (cx->sb_strend - m);
203 cx->sb_m = m = rx->startp[0] + orig;
204 sv_catpvn(dstr, s, m-s);
205 cx->sb_s = rx->endp[0] + orig;
206 cx->sb_rxtainted |= RX_MATCH_TAINTED(rx);
207 rxres_save(&cx->sb_rxres, rx);
208 RETURNOP(pm->op_pmreplstart);
212 Perl_rxres_save(pTHX_ void **rsp, REGEXP *rx)
217 if (!p || p[1] < rx->nparens) {
218 i = 6 + rx->nparens * 2;
226 *p++ = (UV)PTR_CAST (RX_MATCH_COPIED(rx) ? rx->subbeg : Nullch);
227 RX_MATCH_COPIED_off(rx);
231 *p++ = (UV)PTR_CAST rx->subbeg;
232 *p++ = (UV)rx->sublen;
233 for (i = 0; i <= rx->nparens; ++i) {
234 *p++ = (UV)rx->startp[i];
235 *p++ = (UV)rx->endp[i];
240 Perl_rxres_restore(pTHX_ void **rsp, REGEXP *rx)
245 if (RX_MATCH_COPIED(rx))
246 Safefree(rx->subbeg);
247 RX_MATCH_COPIED_set(rx, *p);
252 rx->subbeg = (char*)PTR_CAST (*p++);
253 rx->sublen = (I32)(*p++);
254 for (i = 0; i <= rx->nparens; ++i) {
255 rx->startp[i] = (I32)(*p++);
256 rx->endp[i] = (I32)(*p++);
261 Perl_rxres_free(pTHX_ void **rsp)
266 Safefree((char*)PTR_CAST (*p));
274 djSP; dMARK; dORIGMARK;
275 register SV *tmpForm = *++MARK;
287 bool chopspace = (strchr(PL_chopset, ' ') != Nullch);
293 STRLEN fudge = SvCUR(tmpForm) * (IN_UTF8 ? 3 : 1) + 1;
295 if (!SvMAGICAL(tmpForm) || !SvCOMPILED(tmpForm)) {
296 SvREADONLY_off(tmpForm);
297 doparseform(tmpForm);
300 SvPV_force(PL_formtarget, len);
301 t = SvGROW(PL_formtarget, len + fudge + 1); /* XXX SvCUR bad */
303 f = SvPV(tmpForm, len);
304 /* need to jump to the next word */
305 s = f + len + WORD_ALIGN - SvCUR(tmpForm) % WORD_ALIGN;
314 case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
315 case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
316 case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
317 case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
318 case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
320 case FF_CHECKNL: name = "CHECKNL"; break;
321 case FF_CHECKCHOP: name = "CHECKCHOP"; break;
322 case FF_SPACE: name = "SPACE"; break;
323 case FF_HALFSPACE: name = "HALFSPACE"; break;
324 case FF_ITEM: name = "ITEM"; break;
325 case FF_CHOP: name = "CHOP"; break;
326 case FF_LINEGLOB: name = "LINEGLOB"; break;
327 case FF_NEWLINE: name = "NEWLINE"; break;
328 case FF_MORE: name = "MORE"; break;
329 case FF_LINEMARK: name = "LINEMARK"; break;
330 case FF_END: name = "END"; break;
333 PerlIO_printf(PerlIO_stderr(), "%-16s%ld\n", name, (long) arg);
335 PerlIO_printf(PerlIO_stderr(), "%-16s\n", name);
363 if (ckWARN(WARN_SYNTAX))
364 Perl_warner(aTHX_ WARN_SYNTAX, "Not enough format arguments");
369 item = s = SvPV(sv, len);
372 itemsize = sv_len_utf8(sv);
373 if (itemsize != len) {
375 if (itemsize > fieldsize) {
376 itemsize = fieldsize;
377 itembytes = itemsize;
378 sv_pos_u2b(sv, &itembytes, 0);
382 send = chophere = s + itembytes;
391 sv_pos_b2u(sv, &itemsize);
395 if (itemsize > fieldsize)
396 itemsize = fieldsize;
397 send = chophere = s + itemsize;
409 item = s = SvPV(sv, len);
412 itemsize = sv_len_utf8(sv);
413 if (itemsize != len) {
415 if (itemsize <= fieldsize) {
416 send = chophere = s + itemsize;
427 itemsize = fieldsize;
428 itembytes = itemsize;
429 sv_pos_u2b(sv, &itembytes, 0);
430 send = chophere = s + itembytes;
431 while (s < send || (s == send && isSPACE(*s))) {
441 if (strchr(PL_chopset, *s))
446 itemsize = chophere - item;
447 sv_pos_b2u(sv, &itemsize);
452 if (itemsize <= fieldsize) {
453 send = chophere = s + itemsize;
464 itemsize = fieldsize;
465 send = chophere = s + itemsize;
466 while (s < send || (s == send && isSPACE(*s))) {
476 if (strchr(PL_chopset, *s))
481 itemsize = chophere - item;
486 arg = fieldsize - itemsize;
495 arg = fieldsize - itemsize;
510 switch (UTF8SKIP(s)) {
521 if ( !((*t++ = *s++) & ~31) )
529 int ch = *t++ = *s++;
532 if ( !((*t++ = *s++) & ~31) )
541 while (*s && isSPACE(*s))
548 item = s = SvPV(sv, len);
561 SvCUR_set(PL_formtarget, t - SvPVX(PL_formtarget));
562 sv_catpvn(PL_formtarget, item, itemsize);
563 SvGROW(PL_formtarget, SvCUR(PL_formtarget) + fudge + 1);
564 t = SvPVX(PL_formtarget) + SvCUR(PL_formtarget);
569 /* If the field is marked with ^ and the value is undefined,
572 if ((arg & 512) && !SvOK(sv)) {
580 /* Formats aren't yet marked for locales, so assume "yes". */
582 RESTORE_NUMERIC_LOCAL();
583 #if defined(USE_LONG_DOUBLE)
585 sprintf(t, "%#*.*" PERL_PRIfldbl,
586 (int) fieldsize, (int) arg & 255, value);
588 sprintf(t, "%*.0" PERL_PRIfldbl, (int) fieldsize, value);
593 (int) fieldsize, (int) arg & 255, value);
596 (int) fieldsize, value);
599 RESTORE_NUMERIC_STANDARD();
606 while (t-- > linemark && *t == ' ') ;
614 if (arg) { /* repeat until fields exhausted? */
616 SvCUR_set(PL_formtarget, t - SvPVX(PL_formtarget));
617 lines += FmLINES(PL_formtarget);
620 if (strnEQ(linemark, linemark - arg, arg))
621 DIE(aTHX_ "Runaway format");
623 FmLINES(PL_formtarget) = lines;
625 RETURNOP(cLISTOP->op_first);
638 while (*s && isSPACE(*s) && s < send)
642 arg = fieldsize - itemsize;
649 if (strnEQ(s," ",3)) {
650 while (s > SvPVX(PL_formtarget) && isSPACE(s[-1]))
661 SvCUR_set(PL_formtarget, t - SvPVX(PL_formtarget));
662 FmLINES(PL_formtarget) += lines;
674 if (PL_stack_base + *PL_markstack_ptr == SP) {
676 if (GIMME_V == G_SCALAR)
677 XPUSHs(sv_2mortal(newSViv(0)));
678 RETURNOP(PL_op->op_next->op_next);
680 PL_stack_sp = PL_stack_base + *PL_markstack_ptr + 1;
681 pp_pushmark(); /* push dst */
682 pp_pushmark(); /* push src */
683 ENTER; /* enter outer scope */
686 /* SAVE_DEFSV does *not* suffice here for USE_THREADS */
688 ENTER; /* enter inner scope */
691 src = PL_stack_base[*PL_markstack_ptr];
696 if (PL_op->op_type == OP_MAPSTART)
697 pp_pushmark(); /* push top */
698 return ((LOGOP*)PL_op->op_next)->op_other;
703 DIE(aTHX_ "panic: mapstart"); /* uses grepstart */
709 I32 diff = (SP - PL_stack_base) - *PL_markstack_ptr;
715 ++PL_markstack_ptr[-1];
717 if (diff > PL_markstack_ptr[-1] - PL_markstack_ptr[-2]) {
718 shift = diff - (PL_markstack_ptr[-1] - PL_markstack_ptr[-2]);
719 count = (SP - PL_stack_base) - PL_markstack_ptr[-1] + 2;
724 PL_markstack_ptr[-1] += shift;
725 *PL_markstack_ptr += shift;
729 dst = PL_stack_base + (PL_markstack_ptr[-2] += diff) - 1;
732 *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
734 LEAVE; /* exit inner scope */
737 if (PL_markstack_ptr[-1] > *PL_markstack_ptr) {
741 (void)POPMARK; /* pop top */
742 LEAVE; /* exit outer scope */
743 (void)POPMARK; /* pop src */
744 items = --*PL_markstack_ptr - PL_markstack_ptr[-1];
745 (void)POPMARK; /* pop dst */
746 SP = PL_stack_base + POPMARK; /* pop original mark */
747 if (gimme == G_SCALAR) {
751 else if (gimme == G_ARRAY)
758 ENTER; /* enter inner scope */
761 src = PL_stack_base[PL_markstack_ptr[-1]];
765 RETURNOP(cLOGOP->op_other);
771 djSP; dMARK; dORIGMARK;
773 SV **myorigmark = ORIGMARK;
779 OP* nextop = PL_op->op_next;
782 if (gimme != G_ARRAY) {
788 SAVEPPTR(PL_sortcop);
789 if (PL_op->op_flags & OPf_STACKED) {
790 if (PL_op->op_flags & OPf_SPECIAL) {
791 OP *kid = cLISTOP->op_first->op_sibling; /* pass pushmark */
792 kid = kUNOP->op_first; /* pass rv2gv */
793 kid = kUNOP->op_first; /* pass leave */
794 PL_sortcop = kid->op_next;
795 stash = PL_curcop->cop_stash;
798 cv = sv_2cv(*++MARK, &stash, &gv, 0);
799 if (!(cv && CvROOT(cv))) {
801 SV *tmpstr = sv_newmortal();
802 gv_efullname3(tmpstr, gv, Nullch);
803 if (cv && CvXSUB(cv))
804 DIE(aTHX_ "Xsub \"%s\" called in sort", SvPVX(tmpstr));
805 DIE(aTHX_ "Undefined sort subroutine \"%s\" called",
810 DIE(aTHX_ "Xsub called in sort");
811 DIE(aTHX_ "Undefined subroutine in sort");
813 DIE(aTHX_ "Not a CODE reference in sort");
815 PL_sortcop = CvSTART(cv);
816 SAVESPTR(CvROOT(cv)->op_ppaddr);
817 CvROOT(cv)->op_ppaddr = PL_ppaddr[OP_NULL];
820 PL_curpad = AvARRAY((AV*)AvARRAY(CvPADLIST(cv))[1]);
825 stash = PL_curcop->cop_stash;
829 while (MARK < SP) { /* This may or may not shift down one here. */
831 if (*up = *++MARK) { /* Weed out nulls. */
833 if (!PL_sortcop && !SvPOK(*up)) {
838 (void)sv_2pv(*up, &n_a);
843 max = --up - myorigmark;
848 bool oldcatch = CATCH_GET;
854 PUSHSTACKi(PERLSI_SORT);
855 if (PL_sortstash != stash) {
856 PL_firstgv = gv_fetchpv("a", TRUE, SVt_PV);
857 PL_secondgv = gv_fetchpv("b", TRUE, SVt_PV);
858 PL_sortstash = stash;
861 SAVESPTR(GvSV(PL_firstgv));
862 SAVESPTR(GvSV(PL_secondgv));
864 PUSHBLOCK(cx, CXt_NULL, PL_stack_base);
865 if (!(PL_op->op_flags & OPf_SPECIAL)) {
866 bool hasargs = FALSE;
867 cx->cx_type = CXt_SUB;
868 cx->blk_gimme = G_SCALAR;
871 (void)SvREFCNT_inc(cv); /* in preparation for POPSUB */
873 PL_sortcxix = cxstack_ix;
874 qsortsv((myorigmark+1), max, sortcv);
876 POPBLOCK(cx,PL_curpm);
884 MEXTEND(SP, 20); /* Can't afford stack realloc on signal. */
885 qsortsv(ORIGMARK+1, max,
886 (PL_op->op_private & OPpSORT_NUMERIC)
887 ? ( (PL_op->op_private & OPpSORT_INTEGER)
888 ? ( overloading ? amagic_i_ncmp : sv_i_ncmp)
889 : ( overloading ? amagic_ncmp : sv_ncmp))
890 : ( (PL_op->op_private & OPpLOCALE)
893 : sv_cmp_locale_static)
894 : ( overloading ? amagic_cmp : sv_cmp_static)));
895 if (PL_op->op_private & OPpSORT_REVERSE) {
897 SV **q = ORIGMARK+max;
907 PL_stack_sp = ORIGMARK + max;
915 if (GIMME == G_ARRAY)
917 if (SvTRUEx(PAD_SV(PL_op->op_targ)))
918 return cLOGOP->op_other;
927 if (GIMME == G_ARRAY) {
928 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
932 SV *targ = PAD_SV(PL_op->op_targ);
934 if ((PL_op->op_private & OPpFLIP_LINENUM)
935 ? (PL_last_in_gv && SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv)))
937 sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
938 if (PL_op->op_flags & OPf_SPECIAL) {
946 RETURNOP(((LOGOP*)cUNOP->op_first)->op_other);
959 if (GIMME == G_ARRAY) {
965 if (SvGMAGICAL(left))
967 if (SvGMAGICAL(right))
970 if (SvNIOKp(left) || !SvPOKp(left) ||
971 (looks_like_number(left) && *SvPVX(left) != '0') )
973 if (SvNV(left) < IV_MIN || SvNV(right) > IV_MAX)
974 Perl_croak(aTHX_ "Range iterator outside integer range");
985 sv = sv_2mortal(newSViv(i++));
990 SV *final = sv_mortalcopy(right);
992 char *tmps = SvPV(final, len);
994 sv = sv_mortalcopy(left);
996 while (!SvNIOKp(sv) && SvCUR(sv) <= len) {
998 if (strEQ(SvPVX(sv),tmps))
1000 sv = sv_2mortal(newSVsv(sv));
1007 SV *targ = PAD_SV(cUNOP->op_first->op_targ);
1009 if ((PL_op->op_private & OPpFLIP_LINENUM)
1010 ? (PL_last_in_gv && SvIV(sv) == (IV)IoLINES(GvIOp(PL_last_in_gv)))
1012 sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
1013 sv_catpv(targ, "E0");
1024 S_dopoptolabel(pTHX_ char *label)
1028 register PERL_CONTEXT *cx;
1030 for (i = cxstack_ix; i >= 0; i--) {
1032 switch (CxTYPE(cx)) {
1034 if (ckWARN(WARN_UNSAFE))
1035 Perl_warner(aTHX_ WARN_UNSAFE, "Exiting substitution via %s",
1036 PL_op_name[PL_op->op_type]);
1039 if (ckWARN(WARN_UNSAFE))
1040 Perl_warner(aTHX_ WARN_UNSAFE, "Exiting subroutine via %s",
1041 PL_op_name[PL_op->op_type]);
1044 if (ckWARN(WARN_UNSAFE))
1045 Perl_warner(aTHX_ WARN_UNSAFE, "Exiting eval via %s",
1046 PL_op_name[PL_op->op_type]);
1049 if (ckWARN(WARN_UNSAFE))
1050 Perl_warner(aTHX_ WARN_UNSAFE, "Exiting pseudo-block via %s",
1051 PL_op_name[PL_op->op_type]);
1054 if (!cx->blk_loop.label ||
1055 strNE(label, cx->blk_loop.label) ) {
1056 DEBUG_l(Perl_deb(aTHX_ "(Skipping label #%ld %s)\n",
1057 (long)i, cx->blk_loop.label));
1060 DEBUG_l( Perl_deb(aTHX_ "(Found label #%ld %s)\n", (long)i, label));
1068 Perl_dowantarray(pTHX)
1070 I32 gimme = block_gimme();
1071 return (gimme == G_VOID) ? G_SCALAR : gimme;
1075 Perl_block_gimme(pTHX)
1080 cxix = dopoptosub(cxstack_ix);
1084 switch (cxstack[cxix].blk_gimme) {
1092 Perl_croak(aTHX_ "panic: bad gimme: %d\n", cxstack[cxix].blk_gimme);
1099 S_dopoptosub(pTHX_ I32 startingblock)
1102 return dopoptosub_at(cxstack, startingblock);
1106 S_dopoptosub_at(pTHX_ PERL_CONTEXT *cxstk, I32 startingblock)
1110 register PERL_CONTEXT *cx;
1111 for (i = startingblock; i >= 0; i--) {
1113 switch (CxTYPE(cx)) {
1118 DEBUG_l( Perl_deb(aTHX_ "(Found sub #%ld)\n", (long)i));
1126 S_dopoptoeval(pTHX_ I32 startingblock)
1130 register PERL_CONTEXT *cx;
1131 for (i = startingblock; i >= 0; i--) {
1133 switch (CxTYPE(cx)) {
1137 DEBUG_l( Perl_deb(aTHX_ "(Found eval #%ld)\n", (long)i));
1145 S_dopoptoloop(pTHX_ I32 startingblock)
1149 register PERL_CONTEXT *cx;
1150 for (i = startingblock; i >= 0; i--) {
1152 switch (CxTYPE(cx)) {
1154 if (ckWARN(WARN_UNSAFE))
1155 Perl_warner(aTHX_ WARN_UNSAFE, "Exiting substitution via %s",
1156 PL_op_name[PL_op->op_type]);
1159 if (ckWARN(WARN_UNSAFE))
1160 Perl_warner(aTHX_ WARN_UNSAFE, "Exiting subroutine via %s",
1161 PL_op_name[PL_op->op_type]);
1164 if (ckWARN(WARN_UNSAFE))
1165 Perl_warner(aTHX_ WARN_UNSAFE, "Exiting eval via %s",
1166 PL_op_name[PL_op->op_type]);
1169 if (ckWARN(WARN_UNSAFE))
1170 Perl_warner(aTHX_ WARN_UNSAFE, "Exiting pseudo-block via %s",
1171 PL_op_name[PL_op->op_type]);
1174 DEBUG_l( Perl_deb(aTHX_ "(Found loop #%ld)\n", (long)i));
1182 Perl_dounwind(pTHX_ I32 cxix)
1185 register PERL_CONTEXT *cx;
1189 while (cxstack_ix > cxix) {
1190 cx = &cxstack[cxstack_ix];
1191 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n",
1192 (long) cxstack_ix, PL_block_type[CxTYPE(cx)]));
1193 /* Note: we don't need to restore the base context info till the end. */
1194 switch (CxTYPE(cx)) {
1197 continue; /* not break */
1215 * Closures mentioned at top level of eval cannot be referenced
1216 * again, and their presence indirectly causes a memory leak.
1217 * (Note that the fact that compcv and friends are still set here
1218 * is, AFAIK, an accident.) --Chip
1220 * XXX need to get comppad et al from eval's cv rather than
1221 * relying on the incidental global values.
1224 S_free_closures(pTHX)
1227 SV **svp = AvARRAY(PL_comppad_name);
1229 for (ix = AvFILLp(PL_comppad_name); ix >= 0; ix--) {
1231 if (sv && sv != &PL_sv_undef && *SvPVX(sv) == '&') {
1233 svp[ix] = &PL_sv_undef;
1237 SvREFCNT_dec(CvOUTSIDE(sv));
1238 CvOUTSIDE(sv) = Nullcv;
1251 Perl_die_where(pTHX_ char *message, STRLEN msglen)
1257 register PERL_CONTEXT *cx;
1262 if (PL_in_eval & EVAL_KEEPERR) {
1265 svp = hv_fetch(ERRHV, message, msglen, TRUE);
1268 static char prefix[] = "\t(in cleanup) ";
1270 sv_upgrade(*svp, SVt_IV);
1271 (void)SvIOK_only(*svp);
1274 SvGROW(err, SvCUR(err)+sizeof(prefix)+msglen);
1275 sv_catpvn(err, prefix, sizeof(prefix)-1);
1276 sv_catpvn(err, message, msglen);
1277 if (ckWARN(WARN_UNSAFE)) {
1278 STRLEN start = SvCUR(err)-msglen-sizeof(prefix)+1;
1279 Perl_warner(aTHX_ WARN_UNSAFE, SvPVX(err)+start);
1286 sv_setpvn(ERRSV, message, msglen);
1289 message = SvPVx(ERRSV, msglen);
1291 while ((cxix = dopoptoeval(cxstack_ix)) < 0 && PL_curstackinfo->si_prev) {
1299 if (cxix < cxstack_ix)
1302 POPBLOCK(cx,PL_curpm);
1303 if (CxTYPE(cx) != CXt_EVAL) {
1304 PerlIO_write(PerlIO_stderr(), "panic: die ", 11);
1305 PerlIO_write(PerlIO_stderr(), message, msglen);
1310 if (gimme == G_SCALAR)
1311 *++newsp = &PL_sv_undef;
1312 PL_stack_sp = newsp;
1316 if (optype == OP_REQUIRE) {
1317 char* msg = SvPVx(ERRSV, n_a);
1318 DIE(aTHX_ "%s", *msg ? msg : "Compilation failed in require");
1320 return pop_return();
1324 message = SvPVx(ERRSV, msglen);
1327 /* SFIO can really mess with your errno */
1330 PerlIO_write(PerlIO_stderr(), message, msglen);
1331 (void)PerlIO_flush(PerlIO_stderr());
1344 if (SvTRUE(left) != SvTRUE(right))
1356 RETURNOP(cLOGOP->op_other);
1365 RETURNOP(cLOGOP->op_other);
1371 register I32 cxix = dopoptosub(cxstack_ix);
1372 register PERL_CONTEXT *cx;
1373 register PERL_CONTEXT *ccstack = cxstack;
1374 PERL_SI *top_si = PL_curstackinfo;
1385 /* we may be in a higher stacklevel, so dig down deeper */
1386 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1387 top_si = top_si->si_prev;
1388 ccstack = top_si->si_cxstack;
1389 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1392 if (GIMME != G_ARRAY)
1396 if (PL_DBsub && cxix >= 0 &&
1397 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
1401 cxix = dopoptosub_at(ccstack, cxix - 1);
1404 cx = &ccstack[cxix];
1405 if (CxTYPE(cx) == CXt_SUB) {
1406 dbcxix = dopoptosub_at(ccstack, cxix - 1);
1407 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
1408 field below is defined for any cx. */
1409 if (PL_DBsub && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
1410 cx = &ccstack[dbcxix];
1413 if (GIMME != G_ARRAY) {
1414 hv = cx->blk_oldcop->cop_stash;
1416 PUSHs(&PL_sv_undef);
1419 sv_setpv(TARG, HvNAME(hv));
1425 hv = cx->blk_oldcop->cop_stash;
1427 PUSHs(&PL_sv_undef);
1429 PUSHs(sv_2mortal(newSVpv(HvNAME(hv), 0)));
1430 PUSHs(sv_2mortal(newSVpvn(SvPVX(GvSV(cx->blk_oldcop->cop_filegv)),
1431 SvCUR(GvSV(cx->blk_oldcop->cop_filegv)))));
1432 PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->cop_line)));
1435 if (CxTYPE(cx) == CXt_SUB) { /* So is ccstack[dbcxix]. */
1437 gv_efullname3(sv, CvGV(ccstack[cxix].blk_sub.cv), Nullch);
1438 PUSHs(sv_2mortal(sv));
1439 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
1442 PUSHs(sv_2mortal(newSVpvn("(eval)",6)));
1443 PUSHs(sv_2mortal(newSViv(0)));
1445 gimme = (I32)cx->blk_gimme;
1446 if (gimme == G_VOID)
1447 PUSHs(&PL_sv_undef);
1449 PUSHs(sv_2mortal(newSViv(gimme & G_ARRAY)));
1450 if (CxTYPE(cx) == CXt_EVAL) {
1451 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
1452 PUSHs(cx->blk_eval.cur_text);
1455 else if (cx->blk_eval.old_name) { /* Try blocks have old_name == 0. */
1456 /* Require, put the name. */
1457 PUSHs(sv_2mortal(newSVpv(cx->blk_eval.old_name, 0)));
1462 PUSHs(&PL_sv_undef);
1463 PUSHs(&PL_sv_undef);
1465 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs
1466 && PL_curcop->cop_stash == PL_debstash)
1468 AV *ary = cx->blk_sub.argarray;
1469 int off = AvARRAY(ary) - AvALLOC(ary);
1473 PL_dbargs = GvAV(gv_AVadd(tmpgv = gv_fetchpv("DB::args", TRUE,
1476 AvREAL_off(PL_dbargs); /* XXX Should be REIFY */
1479 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1480 av_extend(PL_dbargs, AvFILLp(ary) + off);
1481 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1482 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
1484 /* XXX only hints propagated via op_private are currently
1485 * visible (others are not easily accessible, since they
1486 * use the global PL_hints) */
1487 PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->op_private &
1488 HINT_PRIVATE_MASK)));
1502 sv_reset(tmps, PL_curcop->cop_stash);
1514 PL_curcop = (COP*)PL_op;
1515 TAINT_NOT; /* Each statement is presumed innocent */
1516 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
1519 if (PL_op->op_private || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
1523 register PERL_CONTEXT *cx;
1524 I32 gimme = G_ARRAY;
1531 DIE(aTHX_ "No DB::DB routine defined");
1533 if (CvDEPTH(cv) >= 1 && !(PL_debug & (1<<30))) /* don't do recursive DB::DB call */
1545 push_return(PL_op->op_next);
1546 PUSHBLOCK(cx, CXt_SUB, SP);
1549 (void)SvREFCNT_inc(cv);
1550 SAVESPTR(PL_curpad);
1551 PL_curpad = AvARRAY((AV*)*av_fetch(CvPADLIST(cv),1,FALSE));
1552 RETURNOP(CvSTART(cv));
1566 register PERL_CONTEXT *cx;
1567 I32 gimme = GIMME_V;
1574 if (PL_op->op_flags & OPf_SPECIAL) {
1576 svp = &THREADSV(PL_op->op_targ); /* per-thread variable */
1577 SAVEGENERICSV(*svp);
1581 #endif /* USE_THREADS */
1582 if (PL_op->op_targ) {
1583 svp = &PL_curpad[PL_op->op_targ]; /* "my" variable */
1587 svp = &GvSV((GV*)POPs); /* symbol table variable */
1588 SAVEGENERICSV(*svp);
1594 PUSHBLOCK(cx, CXt_LOOP, SP);
1595 PUSHLOOP(cx, svp, MARK);
1596 if (PL_op->op_flags & OPf_STACKED) {
1597 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
1598 if (SvTYPE(cx->blk_loop.iterary) != SVt_PVAV) {
1600 if (SvNIOKp(sv) || !SvPOKp(sv) ||
1601 (looks_like_number(sv) && *SvPVX(sv) != '0')) {
1602 if (SvNV(sv) < IV_MIN ||
1603 SvNV((SV*)cx->blk_loop.iterary) >= IV_MAX)
1604 Perl_croak(aTHX_ "Range iterator outside integer range");
1605 cx->blk_loop.iterix = SvIV(sv);
1606 cx->blk_loop.itermax = SvIV((SV*)cx->blk_loop.iterary);
1609 cx->blk_loop.iterlval = newSVsv(sv);
1613 cx->blk_loop.iterary = PL_curstack;
1614 AvFILLp(PL_curstack) = SP - PL_stack_base;
1615 cx->blk_loop.iterix = MARK - PL_stack_base;
1624 register PERL_CONTEXT *cx;
1625 I32 gimme = GIMME_V;
1631 PUSHBLOCK(cx, CXt_LOOP, SP);
1632 PUSHLOOP(cx, 0, SP);
1640 register PERL_CONTEXT *cx;
1641 struct block_loop cxloop;
1649 POPLOOP1(cx); /* Delay POPLOOP2 until stack values are safe */
1652 if (gimme == G_VOID)
1654 else if (gimme == G_SCALAR) {
1656 *++newsp = sv_mortalcopy(*SP);
1658 *++newsp = &PL_sv_undef;
1662 *++newsp = sv_mortalcopy(*++mark);
1663 TAINT_NOT; /* Each item is independent */
1669 POPLOOP2(); /* Stack values are safe: release loop vars ... */
1670 PL_curpm = newpm; /* ... and pop $1 et al */
1682 register PERL_CONTEXT *cx;
1683 struct block_sub cxsub;
1684 bool popsub2 = FALSE;
1690 if (PL_curstackinfo->si_type == PERLSI_SORT) {
1691 if (cxstack_ix == PL_sortcxix || dopoptosub(cxstack_ix) <= PL_sortcxix) {
1692 if (cxstack_ix > PL_sortcxix)
1693 dounwind(PL_sortcxix);
1694 AvARRAY(PL_curstack)[1] = *SP;
1695 PL_stack_sp = PL_stack_base + 1;
1700 cxix = dopoptosub(cxstack_ix);
1702 DIE(aTHX_ "Can't return outside a subroutine");
1703 if (cxix < cxstack_ix)
1707 switch (CxTYPE(cx)) {
1709 POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */
1714 if (AvFILLp(PL_comppad_name) >= 0)
1717 if (optype == OP_REQUIRE &&
1718 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
1720 /* Unassume the success we assumed earlier. */
1721 char *name = cx->blk_eval.old_name;
1722 (void)hv_delete(GvHVn(PL_incgv), name, strlen(name), G_DISCARD);
1723 DIE(aTHX_ "%s did not return a true value", name);
1727 DIE(aTHX_ "panic: return");
1731 if (gimme == G_SCALAR) {
1734 if (cxsub.cv && CvDEPTH(cxsub.cv) > 1) {
1736 *++newsp = SvREFCNT_inc(*SP);
1741 *++newsp = sv_mortalcopy(*SP);
1744 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
1746 *++newsp = sv_mortalcopy(*SP);
1748 *++newsp = &PL_sv_undef;
1750 else if (gimme == G_ARRAY) {
1751 while (++MARK <= SP) {
1752 *++newsp = (popsub2 && SvTEMP(*MARK))
1753 ? *MARK : sv_mortalcopy(*MARK);
1754 TAINT_NOT; /* Each item is independent */
1757 PL_stack_sp = newsp;
1759 /* Stack values are safe: */
1761 POPSUB2(); /* release CV and @_ ... */
1763 PL_curpm = newpm; /* ... and pop $1 et al */
1766 return pop_return();
1773 register PERL_CONTEXT *cx;
1774 struct block_loop cxloop;
1775 struct block_sub cxsub;
1782 SV **mark = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
1784 if (PL_op->op_flags & OPf_SPECIAL) {
1785 cxix = dopoptoloop(cxstack_ix);
1787 DIE(aTHX_ "Can't \"last\" outside a block");
1790 cxix = dopoptolabel(cPVOP->op_pv);
1792 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
1794 if (cxix < cxstack_ix)
1798 switch (CxTYPE(cx)) {
1800 POPLOOP1(cx); /* Delay POPLOOP2 until stack values are safe */
1802 nextop = cxloop.last_op->op_next;
1805 POPSUB1(cx); /* Delay POPSUB2 until stack values are safe */
1807 nextop = pop_return();
1811 nextop = pop_return();
1814 DIE(aTHX_ "panic: last");
1818 if (gimme == G_SCALAR) {
1820 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
1821 ? *SP : sv_mortalcopy(*SP);
1823 *++newsp = &PL_sv_undef;
1825 else if (gimme == G_ARRAY) {
1826 while (++MARK <= SP) {
1827 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
1828 ? *MARK : sv_mortalcopy(*MARK);
1829 TAINT_NOT; /* Each item is independent */
1835 /* Stack values are safe: */
1838 POPLOOP2(); /* release loop vars ... */
1842 POPSUB2(); /* release CV and @_ ... */
1845 PL_curpm = newpm; /* ... and pop $1 et al */
1854 register PERL_CONTEXT *cx;
1857 if (PL_op->op_flags & OPf_SPECIAL) {
1858 cxix = dopoptoloop(cxstack_ix);
1860 DIE(aTHX_ "Can't \"next\" outside a block");
1863 cxix = dopoptolabel(cPVOP->op_pv);
1865 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
1867 if (cxix < cxstack_ix)
1871 oldsave = PL_scopestack[PL_scopestack_ix - 1];
1872 LEAVE_SCOPE(oldsave);
1873 return cx->blk_loop.next_op;
1879 register PERL_CONTEXT *cx;
1882 if (PL_op->op_flags & OPf_SPECIAL) {
1883 cxix = dopoptoloop(cxstack_ix);
1885 DIE(aTHX_ "Can't \"redo\" outside a block");
1888 cxix = dopoptolabel(cPVOP->op_pv);
1890 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
1892 if (cxix < cxstack_ix)
1896 oldsave = PL_scopestack[PL_scopestack_ix - 1];
1897 LEAVE_SCOPE(oldsave);
1898 return cx->blk_loop.redo_op;
1902 S_dofindlabel(pTHX_ OP *o, char *label, OP **opstack, OP **oplimit)
1906 static char too_deep[] = "Target of goto is too deeply nested";
1909 Perl_croak(aTHX_ too_deep);
1910 if (o->op_type == OP_LEAVE ||
1911 o->op_type == OP_SCOPE ||
1912 o->op_type == OP_LEAVELOOP ||
1913 o->op_type == OP_LEAVETRY)
1915 *ops++ = cUNOPo->op_first;
1917 Perl_croak(aTHX_ too_deep);
1920 if (o->op_flags & OPf_KIDS) {
1922 /* First try all the kids at this level, since that's likeliest. */
1923 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
1924 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
1925 kCOP->cop_label && strEQ(kCOP->cop_label, label))
1928 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
1929 if (kid == PL_lastgotoprobe)
1931 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
1933 (ops[-1]->op_type != OP_NEXTSTATE &&
1934 ops[-1]->op_type != OP_DBSTATE)))
1936 if (o = dofindlabel(kid, label, ops, oplimit))
1955 register PERL_CONTEXT *cx;
1956 #define GOTO_DEPTH 64
1957 OP *enterops[GOTO_DEPTH];
1959 int do_dump = (PL_op->op_type == OP_DUMP);
1960 static char must_have_label[] = "goto must have label";
1963 if (PL_op->op_flags & OPf_STACKED) {
1967 /* This egregious kludge implements goto &subroutine */
1968 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
1970 register PERL_CONTEXT *cx;
1971 CV* cv = (CV*)SvRV(sv);
1975 int arg_was_real = 0;
1978 if (!CvROOT(cv) && !CvXSUB(cv)) {
1983 /* autoloaded stub? */
1984 if (cv != GvCV(gv) && (cv = GvCV(gv)))
1986 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
1987 GvNAMELEN(gv), FALSE);
1988 if (autogv && (cv = GvCV(autogv)))
1990 tmpstr = sv_newmortal();
1991 gv_efullname3(tmpstr, gv, Nullch);
1992 DIE(aTHX_ "Goto undefined subroutine &%s",SvPVX(tmpstr));
1994 DIE(aTHX_ "Goto undefined subroutine");
1997 /* First do some returnish stuff. */
1998 cxix = dopoptosub(cxstack_ix);
2000 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
2001 if (cxix < cxstack_ix)
2004 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_ENTEREVAL)
2005 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2007 if (CxTYPE(cx) == CXt_SUB &&
2008 cx->blk_sub.hasargs) { /* put @_ back onto stack */
2009 AV* av = cx->blk_sub.argarray;
2011 items = AvFILLp(av) + 1;
2013 EXTEND(PL_stack_sp, items); /* @_ could have been extended. */
2014 Copy(AvARRAY(av), PL_stack_sp, items, SV*);
2015 PL_stack_sp += items;
2017 SvREFCNT_dec(GvAV(PL_defgv));
2018 GvAV(PL_defgv) = cx->blk_sub.savearray;
2019 #endif /* USE_THREADS */
2022 AvREAL_off(av); /* so av_clear() won't clobber elts */
2026 else if (CvXSUB(cv)) { /* put GvAV(defgv) back onto stack */
2030 av = (AV*)PL_curpad[0];
2032 av = GvAV(PL_defgv);
2034 items = AvFILLp(av) + 1;
2036 EXTEND(PL_stack_sp, items); /* @_ could have been extended. */
2037 Copy(AvARRAY(av), PL_stack_sp, items, SV*);
2038 PL_stack_sp += items;
2040 if (CxTYPE(cx) == CXt_SUB &&
2041 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
2042 SvREFCNT_dec(cx->blk_sub.cv);
2043 oldsave = PL_scopestack[PL_scopestack_ix - 1];
2044 LEAVE_SCOPE(oldsave);
2046 /* Now do some callish stuff. */
2049 #ifdef PERL_XSUB_OLDSTYLE
2050 if (CvOLDSTYLE(cv)) {
2051 I32 (*fp3)(int,int,int);
2056 fp3 = (I32(*)(int,int,int)))CvXSUB(cv;
2057 items = (*fp3)(CvXSUBANY(cv).any_i32,
2058 mark - PL_stack_base + 1,
2060 SP = PL_stack_base + items;
2063 #endif /* PERL_XSUB_OLDSTYLE */
2068 PL_stack_sp--; /* There is no cv arg. */
2069 /* Push a mark for the start of arglist */
2071 (void)(*CvXSUB(cv))(aTHXo_ cv);
2072 /* Pop the current context like a decent sub should */
2073 POPBLOCK(cx, PL_curpm);
2074 /* Do _not_ use PUTBACK, keep the XSUB's return stack! */
2077 return pop_return();
2080 AV* padlist = CvPADLIST(cv);
2081 SV** svp = AvARRAY(padlist);
2082 if (CxTYPE(cx) == CXt_EVAL) {
2083 PL_in_eval = cx->blk_eval.old_in_eval;
2084 PL_eval_root = cx->blk_eval.old_eval_root;
2085 cx->cx_type = CXt_SUB;
2086 cx->blk_sub.hasargs = 0;
2088 cx->blk_sub.cv = cv;
2089 cx->blk_sub.olddepth = CvDEPTH(cv);
2091 if (CvDEPTH(cv) < 2)
2092 (void)SvREFCNT_inc(cv);
2093 else { /* save temporaries on recursion? */
2094 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION))
2095 sub_crush_depth(cv);
2096 if (CvDEPTH(cv) > AvFILLp(padlist)) {
2097 AV *newpad = newAV();
2098 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
2099 I32 ix = AvFILLp((AV*)svp[1]);
2100 svp = AvARRAY(svp[0]);
2101 for ( ;ix > 0; ix--) {
2102 if (svp[ix] != &PL_sv_undef) {
2103 char *name = SvPVX(svp[ix]);
2104 if ((SvFLAGS(svp[ix]) & SVf_FAKE)
2107 /* outer lexical or anon code */
2108 av_store(newpad, ix,
2109 SvREFCNT_inc(oldpad[ix]) );
2111 else { /* our own lexical */
2113 av_store(newpad, ix, sv = (SV*)newAV());
2114 else if (*name == '%')
2115 av_store(newpad, ix, sv = (SV*)newHV());
2117 av_store(newpad, ix, sv = NEWSV(0,0));
2122 av_store(newpad, ix, sv = NEWSV(0,0));
2126 if (cx->blk_sub.hasargs) {
2129 av_store(newpad, 0, (SV*)av);
2130 AvFLAGS(av) = AVf_REIFY;
2132 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
2133 AvFILLp(padlist) = CvDEPTH(cv);
2134 svp = AvARRAY(padlist);
2138 if (!cx->blk_sub.hasargs) {
2139 AV* av = (AV*)PL_curpad[0];
2141 items = AvFILLp(av) + 1;
2143 /* Mark is at the end of the stack. */
2145 Copy(AvARRAY(av), SP + 1, items, SV*);
2150 #endif /* USE_THREADS */
2151 SAVESPTR(PL_curpad);
2152 PL_curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
2154 if (cx->blk_sub.hasargs)
2155 #endif /* USE_THREADS */
2157 AV* av = (AV*)PL_curpad[0];
2161 cx->blk_sub.savearray = GvAV(PL_defgv);
2162 GvAV(PL_defgv) = (AV*)SvREFCNT_inc(av);
2163 #endif /* USE_THREADS */
2164 cx->blk_sub.argarray = av;
2167 if (items >= AvMAX(av) + 1) {
2169 if (AvARRAY(av) != ary) {
2170 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
2171 SvPVX(av) = (char*)ary;
2173 if (items >= AvMAX(av) + 1) {
2174 AvMAX(av) = items - 1;
2175 Renew(ary,items+1,SV*);
2177 SvPVX(av) = (char*)ary;
2180 Copy(mark,AvARRAY(av),items,SV*);
2181 AvFILLp(av) = items - 1;
2182 /* preserve @_ nature */
2193 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
2195 * We do not care about using sv to call CV;
2196 * it's for informational purposes only.
2198 SV *sv = GvSV(PL_DBsub);
2201 if (PERLDB_SUB_NN) {
2202 SvIVX(sv) = (IV)PTR_CAST cv; /* Already upgraded, saved */
2205 gv_efullname3(sv, CvGV(cv), Nullch);
2208 && (gotocv = get_cv("DB::goto", FALSE)) ) {
2209 PUSHMARK( PL_stack_sp );
2210 call_sv((SV*)gotocv, G_SCALAR | G_NODEBUG);
2214 RETURNOP(CvSTART(cv));
2218 label = SvPV(sv,n_a);
2219 if (!(do_dump || *label))
2220 DIE(aTHX_ must_have_label);
2223 else if (PL_op->op_flags & OPf_SPECIAL) {
2225 DIE(aTHX_ must_have_label);
2228 label = cPVOP->op_pv;
2230 if (label && *label) {
2235 PL_lastgotoprobe = 0;
2237 for (ix = cxstack_ix; ix >= 0; ix--) {
2239 switch (CxTYPE(cx)) {
2241 gotoprobe = PL_eval_root; /* XXX not good for nested eval */
2244 gotoprobe = cx->blk_oldcop->op_sibling;
2250 gotoprobe = cx->blk_oldcop->op_sibling;
2252 gotoprobe = PL_main_root;
2255 if (CvDEPTH(cx->blk_sub.cv)) {
2256 gotoprobe = CvROOT(cx->blk_sub.cv);
2261 DIE(aTHX_ "Can't \"goto\" outside a block");
2264 DIE(aTHX_ "panic: goto");
2265 gotoprobe = PL_main_root;
2268 retop = dofindlabel(gotoprobe, label,
2269 enterops, enterops + GOTO_DEPTH);
2272 PL_lastgotoprobe = gotoprobe;
2275 DIE(aTHX_ "Can't find label %s", label);
2277 /* pop unwanted frames */
2279 if (ix < cxstack_ix) {
2286 oldsave = PL_scopestack[PL_scopestack_ix];
2287 LEAVE_SCOPE(oldsave);
2290 /* push wanted frames */
2292 if (*enterops && enterops[1]) {
2294 for (ix = 1; enterops[ix]; ix++) {
2295 PL_op = enterops[ix];
2296 /* Eventually we may want to stack the needed arguments
2297 * for each op. For now, we punt on the hard ones. */
2298 if (PL_op->op_type == OP_ENTERITER)
2299 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop",
2301 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
2309 if (!retop) retop = PL_main_start;
2311 PL_restartop = retop;
2312 PL_do_undump = TRUE;
2316 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2317 PL_do_undump = FALSE;
2333 if (anum == 1 && VMSISH_EXIT)
2338 PUSHs(&PL_sv_undef);
2346 NV value = SvNVx(GvSV(cCOP->cop_gv));
2347 register I32 match = I_32(value);
2350 if (((NV)match) > value)
2351 --match; /* was fractional--truncate other way */
2353 match -= cCOP->uop.scop.scop_offset;
2356 else if (match > cCOP->uop.scop.scop_max)
2357 match = cCOP->uop.scop.scop_max;
2358 PL_op = cCOP->uop.scop.scop_next[match];
2368 PL_op = PL_op->op_next; /* can't assume anything */
2371 match = *(SvPVx(GvSV(cCOP->cop_gv), n_a)) & 255;
2372 match -= cCOP->uop.scop.scop_offset;
2375 else if (match > cCOP->uop.scop.scop_max)
2376 match = cCOP->uop.scop.scop_max;
2377 PL_op = cCOP->uop.scop.scop_next[match];
2386 S_save_lines(pTHX_ AV *array, SV *sv)
2388 register char *s = SvPVX(sv);
2389 register char *send = SvPVX(sv) + SvCUR(sv);
2391 register I32 line = 1;
2393 while (s && s < send) {
2394 SV *tmpstr = NEWSV(85,0);
2396 sv_upgrade(tmpstr, SVt_PVMG);
2397 t = strchr(s, '\n');
2403 sv_setpvn(tmpstr, s, t - s);
2404 av_store(array, line++, tmpstr);
2410 S_docatch_body(pTHX_ va_list args)
2417 S_docatch(pTHX_ OP *o)
2424 assert(CATCH_GET == TRUE);
2428 CALLPROTECT(aTHX_ &ret, MEMBER_TO_FPTR(S_docatch_body));
2434 PL_op = PL_restartop;
2449 Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, char *code, AV** avp)
2450 /* sv Text to convert to OP tree. */
2451 /* startop op_free() this to undo. */
2452 /* code Short string id of the caller. */
2454 dSP; /* Make POPBLOCK work. */
2457 I32 gimme = 0; /* SUSPECT - INITIALZE TO WHAT? NI-S */
2460 OP *oop = PL_op, *rop;
2461 char tmpbuf[TYPE_DIGITS(long) + 12 + 10];
2467 /* switch to eval mode */
2469 if (PL_curcop == &PL_compiling) {
2470 SAVESPTR(PL_compiling.cop_stash);
2471 PL_compiling.cop_stash = PL_curstash;
2473 SAVESPTR(PL_compiling.cop_filegv);
2474 SAVEI16(PL_compiling.cop_line);
2475 sprintf(tmpbuf, "_<(%.10s_eval %lu)", code, (unsigned long)++PL_evalseq);
2476 PL_compiling.cop_filegv = gv_fetchfile(tmpbuf+2);
2477 PL_compiling.cop_line = 1;
2478 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2479 deleting the eval's FILEGV from the stash before gv_check() runs
2480 (i.e. before run-time proper). To work around the coredump that
2481 ensues, we always turn GvMULTI_on for any globals that were
2482 introduced within evals. See force_ident(). GSAR 96-10-12 */
2483 safestr = savepv(tmpbuf);
2484 SAVEDELETE(PL_defstash, safestr, strlen(safestr));
2486 #ifdef OP_IN_REGISTER
2494 PL_op->op_type = OP_ENTEREVAL;
2495 PL_op->op_flags = 0; /* Avoid uninit warning. */
2496 PUSHBLOCK(cx, CXt_EVAL, SP);
2497 PUSHEVAL(cx, 0, PL_compiling.cop_filegv);
2498 rop = doeval(G_SCALAR, startop);
2499 POPBLOCK(cx,PL_curpm);
2502 (*startop)->op_type = OP_NULL;
2503 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
2505 *avp = (AV*)SvREFCNT_inc(PL_comppad);
2507 if (PL_curcop == &PL_compiling)
2508 PL_compiling.op_private = PL_hints;
2509 #ifdef OP_IN_REGISTER
2515 /* With USE_THREADS, eval_owner must be held on entry to doeval */
2517 S_doeval(pTHX_ int gimme, OP** startop)
2526 PL_in_eval = EVAL_INEVAL;
2530 /* set up a scratch pad */
2533 SAVESPTR(PL_curpad);
2534 SAVESPTR(PL_comppad);
2535 SAVESPTR(PL_comppad_name);
2536 SAVEI32(PL_comppad_name_fill);
2537 SAVEI32(PL_min_intro_pending);
2538 SAVEI32(PL_max_intro_pending);
2541 for (i = cxstack_ix - 1; i >= 0; i--) {
2542 PERL_CONTEXT *cx = &cxstack[i];
2543 if (CxTYPE(cx) == CXt_EVAL)
2545 else if (CxTYPE(cx) == CXt_SUB) {
2546 caller = cx->blk_sub.cv;
2551 SAVESPTR(PL_compcv);
2552 PL_compcv = (CV*)NEWSV(1104,0);
2553 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2554 CvEVAL_on(PL_compcv);
2556 CvOWNER(PL_compcv) = 0;
2557 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
2558 MUTEX_INIT(CvMUTEXP(PL_compcv));
2559 #endif /* USE_THREADS */
2561 PL_comppad = newAV();
2562 av_push(PL_comppad, Nullsv);
2563 PL_curpad = AvARRAY(PL_comppad);
2564 PL_comppad_name = newAV();
2565 PL_comppad_name_fill = 0;
2566 PL_min_intro_pending = 0;
2569 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
2570 PL_curpad[0] = (SV*)newAV();
2571 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
2572 #endif /* USE_THREADS */
2574 comppadlist = newAV();
2575 AvREAL_off(comppadlist);
2576 av_store(comppadlist, 0, (SV*)PL_comppad_name);
2577 av_store(comppadlist, 1, (SV*)PL_comppad);
2578 CvPADLIST(PL_compcv) = comppadlist;
2580 if (!saveop || saveop->op_type != OP_REQUIRE)
2581 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(caller);
2583 SAVEFREESV(PL_compcv);
2585 /* make sure we compile in the right package */
2587 newstash = PL_curcop->cop_stash;
2588 if (PL_curstash != newstash) {
2589 SAVESPTR(PL_curstash);
2590 PL_curstash = newstash;
2592 SAVESPTR(PL_beginav);
2593 PL_beginav = newAV();
2594 SAVEFREESV(PL_beginav);
2596 /* try to compile it */
2598 PL_eval_root = Nullop;
2600 PL_curcop = &PL_compiling;
2601 PL_curcop->cop_arybase = 0;
2602 SvREFCNT_dec(PL_rs);
2603 PL_rs = newSVpvn("\n", 1);
2604 if (saveop && saveop->op_flags & OPf_SPECIAL)
2605 PL_in_eval |= EVAL_KEEPERR;
2608 if (yyparse() || PL_error_count || !PL_eval_root) {
2612 I32 optype = 0; /* Might be reset by POPEVAL. */
2617 op_free(PL_eval_root);
2618 PL_eval_root = Nullop;
2620 SP = PL_stack_base + POPMARK; /* pop original mark */
2622 POPBLOCK(cx,PL_curpm);
2628 if (optype == OP_REQUIRE) {
2629 char* msg = SvPVx(ERRSV, n_a);
2630 DIE(aTHX_ "%s", *msg ? msg : "Compilation failed in require");
2631 } else if (startop) {
2632 char* msg = SvPVx(ERRSV, n_a);
2634 POPBLOCK(cx,PL_curpm);
2636 Perl_croak(aTHX_ "%sCompilation failed in regexp", (*msg ? msg : "Unknown error\n"));
2638 SvREFCNT_dec(PL_rs);
2639 PL_rs = SvREFCNT_inc(PL_nrs);
2641 MUTEX_LOCK(&PL_eval_mutex);
2643 COND_SIGNAL(&PL_eval_cond);
2644 MUTEX_UNLOCK(&PL_eval_mutex);
2645 #endif /* USE_THREADS */
2648 SvREFCNT_dec(PL_rs);
2649 PL_rs = SvREFCNT_inc(PL_nrs);
2650 PL_compiling.cop_line = 0;
2652 *startop = PL_eval_root;
2653 SvREFCNT_dec(CvOUTSIDE(PL_compcv));
2654 CvOUTSIDE(PL_compcv) = Nullcv;
2656 SAVEFREEOP(PL_eval_root);
2658 scalarvoid(PL_eval_root);
2659 else if (gimme & G_ARRAY)
2662 scalar(PL_eval_root);
2664 DEBUG_x(dump_eval());
2666 /* Register with debugger: */
2667 if (PERLDB_INTER && saveop->op_type == OP_REQUIRE) {
2668 CV *cv = get_cv("DB::postponed", FALSE);
2672 XPUSHs((SV*)PL_compiling.cop_filegv);
2674 call_sv((SV*)cv, G_DISCARD);
2678 /* compiled okay, so do it */
2680 CvDEPTH(PL_compcv) = 1;
2681 SP = PL_stack_base + POPMARK; /* pop original mark */
2682 PL_op = saveop; /* The caller may need it. */
2684 MUTEX_LOCK(&PL_eval_mutex);
2686 COND_SIGNAL(&PL_eval_cond);
2687 MUTEX_UNLOCK(&PL_eval_mutex);
2688 #endif /* USE_THREADS */
2690 RETURNOP(PL_eval_start);
2694 S_doopen_pmc(pTHX_ const char *name, const char *mode)
2696 STRLEN namelen = strlen(name);
2699 if (namelen > 3 && strEQ(name + namelen - 3, ".pm")) {
2700 SV *pmcsv = Perl_newSVpvf(aTHX_ "%s%c", name, 'c');
2701 char *pmc = SvPV_nolen(pmcsv);
2704 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
2705 fp = PerlIO_open(name, mode);
2708 if (PerlLIO_stat(name, &pmstat) < 0 ||
2709 pmstat.st_mtime < pmcstat.st_mtime)
2711 fp = PerlIO_open(pmc, mode);
2714 fp = PerlIO_open(name, mode);
2717 SvREFCNT_dec(pmcsv);
2720 fp = PerlIO_open(name, mode);
2728 register PERL_CONTEXT *cx;
2733 SV *namesv = Nullsv;
2735 I32 gimme = G_SCALAR;
2736 PerlIO *tryrsfp = 0;
2738 int filter_has_file = 0;
2739 GV *filter_child_proc = 0;
2740 SV *filter_state = 0;
2744 if (SvNIOKp(sv) && !SvPOKp(sv)) {
2745 if (Atof(PL_patchlevel) + 0.00000999 < SvNV(sv))
2746 DIE(aTHX_ "Perl %s required--this is only version %s, stopped",
2747 SvPV(sv,n_a),PL_patchlevel);
2750 name = SvPV(sv, len);
2751 if (!(name && len > 0 && *name))
2752 DIE(aTHX_ "Null filename used");
2753 TAINT_PROPER("require");
2754 if (PL_op->op_type == OP_REQUIRE &&
2755 (svp = hv_fetch(GvHVn(PL_incgv), name, len, 0)) &&
2756 *svp != &PL_sv_undef)
2759 /* prepare to compile file */
2764 (name[1] == '.' && name[2] == '/')))
2766 || (name[0] && name[1] == ':')
2769 || (name[0] == '\\' && name[1] == '\\') /* UNC path */
2772 || (strchr(name,':') || ((*name == '[' || *name == '<') &&
2773 (isALNUM(name[1]) || strchr("$-_]>",name[1]))))
2778 tryrsfp = doopen_pmc(name,PERL_SCRIPT_MODE);
2781 AV *ar = GvAVn(PL_incgv);
2785 if ((unixname = tounixspec(name, Nullch)) != Nullch)
2788 namesv = NEWSV(806, 0);
2789 for (i = 0; i <= AvFILL(ar); i++) {
2790 SV *dirsv = *av_fetch(ar, i, TRUE);
2796 if (SvTYPE(SvRV(loader)) == SVt_PVAV) {
2797 loader = *av_fetch((AV *)SvRV(loader), 0, TRUE);
2800 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%lx/%s",
2801 SvANY(loader), name);
2802 tryname = SvPVX(namesv);
2813 count = call_sv(loader, G_ARRAY);
2823 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVGV) {
2827 if (SvTYPE(arg) == SVt_PVGV) {
2828 IO *io = GvIO((GV *)arg);
2833 tryrsfp = IoIFP(io);
2834 if (IoTYPE(io) == '|') {
2835 /* reading from a child process doesn't
2836 nest -- when returning from reading
2837 the inner module, the outer one is
2838 unreadable (closed?) I've tried to
2839 save the gv to manage the lifespan of
2840 the pipe, but this didn't help. XXX */
2841 filter_child_proc = (GV *)arg;
2842 (void)SvREFCNT_inc(filter_child_proc);
2845 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
2846 PerlIO_close(IoOFP(io));
2858 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
2860 (void)SvREFCNT_inc(filter_sub);
2863 filter_state = SP[i];
2864 (void)SvREFCNT_inc(filter_state);
2868 tryrsfp = PerlIO_open("/dev/null",
2882 filter_has_file = 0;
2883 if (filter_child_proc) {
2884 SvREFCNT_dec(filter_child_proc);
2885 filter_child_proc = 0;
2888 SvREFCNT_dec(filter_state);
2892 SvREFCNT_dec(filter_sub);
2897 char *dir = SvPVx(dirsv, n_a);
2900 if ((unixdir = tounixpath(dir, Nullch)) == Nullch)
2902 sv_setpv(namesv, unixdir);
2903 sv_catpv(namesv, unixname);
2905 Perl_sv_setpvf(aTHX_ namesv, "%s/%s", dir, name);
2907 TAINT_PROPER("require");
2908 tryname = SvPVX(namesv);
2909 tryrsfp = doopen_pmc(tryname, PERL_SCRIPT_MODE);
2911 if (tryname[0] == '.' && tryname[1] == '/')
2919 SAVESPTR(PL_compiling.cop_filegv);
2920 PL_compiling.cop_filegv = gv_fetchfile(tryrsfp ? tryname : name);
2921 SvREFCNT_dec(namesv);
2923 if (PL_op->op_type == OP_REQUIRE) {
2924 char *msgstr = name;
2925 if (namesv) { /* did we lookup @INC? */
2926 SV *msg = sv_2mortal(newSVpv(msgstr,0));
2927 SV *dirmsgsv = NEWSV(0, 0);
2928 AV *ar = GvAVn(PL_incgv);
2930 sv_catpvn(msg, " in @INC", 8);
2931 if (instr(SvPVX(msg), ".h "))
2932 sv_catpv(msg, " (change .h to .ph maybe?)");
2933 if (instr(SvPVX(msg), ".ph "))
2934 sv_catpv(msg, " (did you run h2ph?)");
2935 sv_catpv(msg, " (@INC contains:");
2936 for (i = 0; i <= AvFILL(ar); i++) {
2937 char *dir = SvPVx(*av_fetch(ar, i, TRUE), n_a);
2938 Perl_sv_setpvf(aTHX_ dirmsgsv, " %s", dir);
2939 sv_catsv(msg, dirmsgsv);
2941 sv_catpvn(msg, ")", 1);
2942 SvREFCNT_dec(dirmsgsv);
2943 msgstr = SvPV_nolen(msg);
2945 DIE(aTHX_ "Can't locate %s", msgstr);
2951 SETERRNO(0, SS$_NORMAL);
2953 /* Assume success here to prevent recursive requirement. */
2954 (void)hv_store(GvHVn(PL_incgv), name, strlen(name),
2955 newSVsv(GvSV(PL_compiling.cop_filegv)), 0 );
2959 lex_start(sv_2mortal(newSVpvn("",0)));
2960 SAVEGENERICSV(PL_rsfp_filters);
2961 PL_rsfp_filters = Nullav;
2964 name = savepv(name);
2968 SAVEPPTR(PL_compiling.cop_warnings);
2969 if (PL_dowarn & G_WARN_ALL_ON)
2970 PL_compiling.cop_warnings = WARN_ALL ;
2971 else if (PL_dowarn & G_WARN_ALL_OFF)
2972 PL_compiling.cop_warnings = WARN_NONE ;
2974 PL_compiling.cop_warnings = WARN_STD ;
2976 if (filter_sub || filter_child_proc) {
2977 SV *datasv = filter_add(run_user_filter, Nullsv);
2978 IoLINES(datasv) = filter_has_file;
2979 IoFMT_GV(datasv) = (GV *)filter_child_proc;
2980 IoTOP_GV(datasv) = (GV *)filter_state;
2981 IoBOTTOM_GV(datasv) = (GV *)filter_sub;
2984 /* switch to eval mode */
2985 push_return(PL_op->op_next);
2986 PUSHBLOCK(cx, CXt_EVAL, SP);
2987 PUSHEVAL(cx, name, PL_compiling.cop_filegv);
2989 SAVEI16(PL_compiling.cop_line);
2990 PL_compiling.cop_line = 0;
2994 MUTEX_LOCK(&PL_eval_mutex);
2995 if (PL_eval_owner && PL_eval_owner != thr)
2996 while (PL_eval_owner)
2997 COND_WAIT(&PL_eval_cond, &PL_eval_mutex);
2998 PL_eval_owner = thr;
2999 MUTEX_UNLOCK(&PL_eval_mutex);
3000 #endif /* USE_THREADS */
3001 return DOCATCH(doeval(G_SCALAR, NULL));
3006 return pp_require();
3012 register PERL_CONTEXT *cx;
3014 I32 gimme = GIMME_V, was = PL_sub_generation;
3015 char tmpbuf[TYPE_DIGITS(long) + 12];
3020 if (!SvPV(sv,len) || !len)
3022 TAINT_PROPER("eval");
3028 /* switch to eval mode */
3030 SAVESPTR(PL_compiling.cop_filegv);
3031 sprintf(tmpbuf, "_<(eval %lu)", (unsigned long)++PL_evalseq);
3032 PL_compiling.cop_filegv = gv_fetchfile(tmpbuf+2);
3033 PL_compiling.cop_line = 1;
3034 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
3035 deleting the eval's FILEGV from the stash before gv_check() runs
3036 (i.e. before run-time proper). To work around the coredump that
3037 ensues, we always turn GvMULTI_on for any globals that were
3038 introduced within evals. See force_ident(). GSAR 96-10-12 */
3039 safestr = savepv(tmpbuf);
3040 SAVEDELETE(PL_defstash, safestr, strlen(safestr));
3042 PL_hints = PL_op->op_targ;
3043 SAVEPPTR(PL_compiling.cop_warnings);
3044 if (!specialWARN(PL_compiling.cop_warnings)) {
3045 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
3046 SAVEFREESV(PL_compiling.cop_warnings) ;
3049 push_return(PL_op->op_next);
3050 PUSHBLOCK(cx, (CXt_EVAL|CXp_REAL), SP);
3051 PUSHEVAL(cx, 0, PL_compiling.cop_filegv);
3053 /* prepare to compile string */
3055 if (PERLDB_LINE && PL_curstash != PL_debstash)
3056 save_lines(GvAV(PL_compiling.cop_filegv), PL_linestr);
3059 MUTEX_LOCK(&PL_eval_mutex);
3060 if (PL_eval_owner && PL_eval_owner != thr)
3061 while (PL_eval_owner)
3062 COND_WAIT(&PL_eval_cond, &PL_eval_mutex);
3063 PL_eval_owner = thr;
3064 MUTEX_UNLOCK(&PL_eval_mutex);
3065 #endif /* USE_THREADS */
3066 ret = doeval(gimme, NULL);
3067 if (PERLDB_INTER && was != PL_sub_generation /* Some subs defined here. */
3068 && ret != PL_op->op_next) { /* Successive compilation. */
3069 strcpy(safestr, "_<(eval )"); /* Anything fake and short. */
3071 return DOCATCH(ret);
3081 register PERL_CONTEXT *cx;
3083 U8 save_flags = PL_op -> op_flags;
3088 retop = pop_return();
3091 if (gimme == G_VOID)
3093 else if (gimme == G_SCALAR) {
3096 if (SvFLAGS(TOPs) & SVs_TEMP)
3099 *MARK = sv_mortalcopy(TOPs);
3103 *MARK = &PL_sv_undef;
3107 /* in case LEAVE wipes old return values */
3108 for (mark = newsp + 1; mark <= SP; mark++) {
3109 if (!(SvFLAGS(*mark) & SVs_TEMP)) {
3110 *mark = sv_mortalcopy(*mark);
3111 TAINT_NOT; /* Each item is independent */
3115 PL_curpm = newpm; /* Don't pop $1 et al till now */
3117 if (AvFILLp(PL_comppad_name) >= 0)
3121 assert(CvDEPTH(PL_compcv) == 1);
3123 CvDEPTH(PL_compcv) = 0;
3126 if (optype == OP_REQUIRE &&
3127 !(gimme == G_SCALAR ? SvTRUE(*SP) : SP > newsp))
3129 /* Unassume the success we assumed earlier. */
3130 char *name = cx->blk_eval.old_name;
3131 (void)hv_delete(GvHVn(PL_incgv), name, strlen(name), G_DISCARD);
3132 retop = Perl_die(aTHX_ "%s did not return a true value", name);
3133 /* die_where() did LEAVE, or we won't be here */
3137 if (!(save_flags & OPf_SPECIAL))
3147 register PERL_CONTEXT *cx;
3148 I32 gimme = GIMME_V;
3153 push_return(cLOGOP->op_other->op_next);
3154 PUSHBLOCK(cx, CXt_EVAL, SP);
3156 PL_eval_root = PL_op; /* Only needed so that goto works right. */
3158 PL_in_eval = EVAL_INEVAL;
3161 return DOCATCH(PL_op->op_next);
3171 register PERL_CONTEXT *cx;
3179 if (gimme == G_VOID)
3181 else if (gimme == G_SCALAR) {
3184 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
3187 *MARK = sv_mortalcopy(TOPs);
3191 *MARK = &PL_sv_undef;
3196 /* in case LEAVE wipes old return values */
3197 for (mark = newsp + 1; mark <= SP; mark++) {
3198 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
3199 *mark = sv_mortalcopy(*mark);
3200 TAINT_NOT; /* Each item is independent */
3204 PL_curpm = newpm; /* Don't pop $1 et al till now */
3212 S_doparseform(pTHX_ SV *sv)
3215 register char *s = SvPV_force(sv, len);
3216 register char *send = s + len;
3217 register char *base;
3218 register I32 skipspaces = 0;
3221 bool postspace = FALSE;
3229 Perl_croak(aTHX_ "Null picture in formline");
3231 New(804, fops, (send - s)*3+10, U16); /* Almost certainly too long... */
3236 *fpc++ = FF_LINEMARK;
3237 noblank = repeat = FALSE;
3255 case ' ': case '\t':
3266 *fpc++ = FF_LITERAL;
3274 *fpc++ = skipspaces;
3278 *fpc++ = FF_NEWLINE;
3282 arg = fpc - linepc + 1;
3289 *fpc++ = FF_LINEMARK;
3290 noblank = repeat = FALSE;
3299 ischop = s[-1] == '^';
3305 arg = (s - base) - 1;
3307 *fpc++ = FF_LITERAL;
3316 *fpc++ = FF_LINEGLOB;
3318 else if (*s == '#' || (*s == '.' && s[1] == '#')) {
3319 arg = ischop ? 512 : 0;
3329 arg |= 256 + (s - f);
3331 *fpc++ = s - base; /* fieldsize for FETCH */
3332 *fpc++ = FF_DECIMAL;
3337 bool ismore = FALSE;
3340 while (*++s == '>') ;
3341 prespace = FF_SPACE;
3343 else if (*s == '|') {
3344 while (*++s == '|') ;
3345 prespace = FF_HALFSPACE;
3350 while (*++s == '<') ;
3353 if (*s == '.' && s[1] == '.' && s[2] == '.') {
3357 *fpc++ = s - base; /* fieldsize for FETCH */
3359 *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL;
3377 { /* need to jump to the next word */
3379 z = WORD_ALIGN - SvCUR(sv) % WORD_ALIGN;
3380 SvGROW(sv, SvCUR(sv) + z + arg * sizeof(U16) + 4);
3381 s = SvPVX(sv) + SvCUR(sv) + z;
3383 Copy(fops, s, arg, U16);
3385 sv_magic(sv, Nullsv, 'f', Nullch, 0);
3390 * The rest of this file was derived from source code contributed
3393 * NOTE: this code was derived from Tom Horsley's qsort replacement
3394 * and should not be confused with the original code.
3397 /* Copyright (C) Tom Horsley, 1997. All rights reserved.
3399 Permission granted to distribute under the same terms as perl which are
3402 This program is free software; you can redistribute it and/or modify
3403 it under the terms of either:
3405 a) the GNU General Public License as published by the Free
3406 Software Foundation; either version 1, or (at your option) any
3409 b) the "Artistic License" which comes with this Kit.
3411 Details on the perl license can be found in the perl source code which
3412 may be located via the www.perl.com web page.
3414 This is the most wonderfulest possible qsort I can come up with (and
3415 still be mostly portable) My (limited) tests indicate it consistently
3416 does about 20% fewer calls to compare than does the qsort in the Visual
3417 C++ library, other vendors may vary.
3419 Some of the ideas in here can be found in "Algorithms" by Sedgewick,
3420 others I invented myself (or more likely re-invented since they seemed
3421 pretty obvious once I watched the algorithm operate for a while).
3423 Most of this code was written while watching the Marlins sweep the Giants
3424 in the 1997 National League Playoffs - no Braves fans allowed to use this
3425 code (just kidding :-).
3427 I realize that if I wanted to be true to the perl tradition, the only
3428 comment in this file would be something like:
3430 ...they shuffled back towards the rear of the line. 'No, not at the
3431 rear!' the slave-driver shouted. 'Three files up. And stay there...
3433 However, I really needed to violate that tradition just so I could keep
3434 track of what happens myself, not to mention some poor fool trying to
3435 understand this years from now :-).
3438 /* ********************************************************** Configuration */
3440 #ifndef QSORT_ORDER_GUESS
3441 #define QSORT_ORDER_GUESS 2 /* Select doubling version of the netBSD trick */
3444 /* QSORT_MAX_STACK is the largest number of partitions that can be stacked up for
3445 future processing - a good max upper bound is log base 2 of memory size
3446 (32 on 32 bit machines, 64 on 64 bit machines, etc). In reality can
3447 safely be smaller than that since the program is taking up some space and
3448 most operating systems only let you grab some subset of contiguous
3449 memory (not to mention that you are normally sorting data larger than
3450 1 byte element size :-).
3452 #ifndef QSORT_MAX_STACK
3453 #define QSORT_MAX_STACK 32
3456 /* QSORT_BREAK_EVEN is the size of the largest partition we should insertion sort.
3457 Anything bigger and we use qsort. If you make this too small, the qsort
3458 will probably break (or become less efficient), because it doesn't expect
3459 the middle element of a partition to be the same as the right or left -
3460 you have been warned).
3462 #ifndef QSORT_BREAK_EVEN
3463 #define QSORT_BREAK_EVEN 6
3466 /* ************************************************************* Data Types */
3468 /* hold left and right index values of a partition waiting to be sorted (the
3469 partition includes both left and right - right is NOT one past the end or
3470 anything like that).
3472 struct partition_stack_entry {
3475 #ifdef QSORT_ORDER_GUESS
3476 int qsort_break_even;
3480 /* ******************************************************* Shorthand Macros */
3482 /* Note that these macros will be used from inside the qsort function where
3483 we happen to know that the variable 'elt_size' contains the size of an
3484 array element and the variable 'temp' points to enough space to hold a
3485 temp element and the variable 'array' points to the array being sorted
3486 and 'compare' is the pointer to the compare routine.
3488 Also note that there are very many highly architecture specific ways
3489 these might be sped up, but this is simply the most generally portable
3490 code I could think of.
3493 /* Return < 0 == 0 or > 0 as the value of elt1 is < elt2, == elt2, > elt2
3495 #define qsort_cmp(elt1, elt2) \
3496 ((*compare)(aTHXo_ array[elt1], array[elt2]))
3498 #ifdef QSORT_ORDER_GUESS
3499 #define QSORT_NOTICE_SWAP swapped++;
3501 #define QSORT_NOTICE_SWAP
3504 /* swaps contents of array elements elt1, elt2.
3506 #define qsort_swap(elt1, elt2) \
3509 temp = array[elt1]; \
3510 array[elt1] = array[elt2]; \
3511 array[elt2] = temp; \
3514 /* rotate contents of elt1, elt2, elt3 such that elt1 gets elt2, elt2 gets
3515 elt3 and elt3 gets elt1.
3517 #define qsort_rotate(elt1, elt2, elt3) \
3520 temp = array[elt1]; \
3521 array[elt1] = array[elt2]; \
3522 array[elt2] = array[elt3]; \
3523 array[elt3] = temp; \
3526 /* ************************************************************ Debug stuff */
3533 return; /* good place to set a breakpoint */
3536 #define qsort_assert(t) (void)( (t) || (break_here(), 0) )
3539 doqsort_all_asserts(
3543 int (*compare)(const void * elt1, const void * elt2),
3544 int pc_left, int pc_right, int u_left, int u_right)
3548 qsort_assert(pc_left <= pc_right);
3549 qsort_assert(u_right < pc_left);
3550 qsort_assert(pc_right < u_left);
3551 for (i = u_right + 1; i < pc_left; ++i) {
3552 qsort_assert(qsort_cmp(i, pc_left) < 0);
3554 for (i = pc_left; i < pc_right; ++i) {
3555 qsort_assert(qsort_cmp(i, pc_right) == 0);
3557 for (i = pc_right + 1; i < u_left; ++i) {
3558 qsort_assert(qsort_cmp(pc_right, i) < 0);
3562 #define qsort_all_asserts(PC_LEFT, PC_RIGHT, U_LEFT, U_RIGHT) \
3563 doqsort_all_asserts(array, num_elts, elt_size, compare, \
3564 PC_LEFT, PC_RIGHT, U_LEFT, U_RIGHT)
3568 #define qsort_assert(t) ((void)0)
3570 #define qsort_all_asserts(PC_LEFT, PC_RIGHT, U_LEFT, U_RIGHT) ((void)0)
3574 /* ****************************************************************** qsort */
3577 S_qsortsv(pTHX_ SV ** array, size_t num_elts, SVCOMPARE_t compare)
3581 struct partition_stack_entry partition_stack[QSORT_MAX_STACK];
3582 int next_stack_entry = 0;
3586 #ifdef QSORT_ORDER_GUESS
3587 int qsort_break_even;
3591 /* Make sure we actually have work to do.
3593 if (num_elts <= 1) {
3597 /* Setup the initial partition definition and fall into the sorting loop
3600 part_right = (int)(num_elts - 1);
3601 #ifdef QSORT_ORDER_GUESS
3602 qsort_break_even = QSORT_BREAK_EVEN;
3604 #define qsort_break_even QSORT_BREAK_EVEN
3607 if ((part_right - part_left) >= qsort_break_even) {
3608 /* OK, this is gonna get hairy, so lets try to document all the
3609 concepts and abbreviations and variables and what they keep
3612 pc: pivot chunk - the set of array elements we accumulate in the
3613 middle of the partition, all equal in value to the original
3614 pivot element selected. The pc is defined by:
3616 pc_left - the leftmost array index of the pc
3617 pc_right - the rightmost array index of the pc
3619 we start with pc_left == pc_right and only one element
3620 in the pivot chunk (but it can grow during the scan).
3622 u: uncompared elements - the set of elements in the partition
3623 we have not yet compared to the pivot value. There are two
3624 uncompared sets during the scan - one to the left of the pc
3625 and one to the right.
3627 u_right - the rightmost index of the left side's uncompared set
3628 u_left - the leftmost index of the right side's uncompared set
3630 The leftmost index of the left sides's uncompared set
3631 doesn't need its own variable because it is always defined
3632 by the leftmost edge of the whole partition (part_left). The
3633 same goes for the rightmost edge of the right partition
3636 We know there are no uncompared elements on the left once we
3637 get u_right < part_left and no uncompared elements on the
3638 right once u_left > part_right. When both these conditions
3639 are met, we have completed the scan of the partition.
3641 Any elements which are between the pivot chunk and the
3642 uncompared elements should be less than the pivot value on
3643 the left side and greater than the pivot value on the right
3644 side (in fact, the goal of the whole algorithm is to arrange
3645 for that to be true and make the groups of less-than and
3646 greater-then elements into new partitions to sort again).
3648 As you marvel at the complexity of the code and wonder why it
3649 has to be so confusing. Consider some of the things this level
3650 of confusion brings:
3652 Once I do a compare, I squeeze every ounce of juice out of it. I
3653 never do compare calls I don't have to do, and I certainly never
3656 I also never swap any elements unless I can prove there is a
3657 good reason. Many sort algorithms will swap a known value with
3658 an uncompared value just to get things in the right place (or
3659 avoid complexity :-), but that uncompared value, once it gets
3660 compared, may then have to be swapped again. A lot of the
3661 complexity of this code is due to the fact that it never swaps
3662 anything except compared values, and it only swaps them when the
3663 compare shows they are out of position.
3665 int pc_left, pc_right;
3666 int u_right, u_left;
3670 pc_left = ((part_left + part_right) / 2);
3672 u_right = pc_left - 1;
3673 u_left = pc_right + 1;
3675 /* Qsort works best when the pivot value is also the median value
3676 in the partition (unfortunately you can't find the median value
3677 without first sorting :-), so to give the algorithm a helping
3678 hand, we pick 3 elements and sort them and use the median value
3679 of that tiny set as the pivot value.
3681 Some versions of qsort like to use the left middle and right as
3682 the 3 elements to sort so they can insure the ends of the
3683 partition will contain values which will stop the scan in the
3684 compare loop, but when you have to call an arbitrarily complex
3685 routine to do a compare, its really better to just keep track of
3686 array index values to know when you hit the edge of the
3687 partition and avoid the extra compare. An even better reason to
3688 avoid using a compare call is the fact that you can drop off the
3689 edge of the array if someone foolishly provides you with an
3690 unstable compare function that doesn't always provide consistent
3693 So, since it is simpler for us to compare the three adjacent
3694 elements in the middle of the partition, those are the ones we
3695 pick here (conveniently pointed at by u_right, pc_left, and
3696 u_left). The values of the left, center, and right elements
3697 are refered to as l c and r in the following comments.
3700 #ifdef QSORT_ORDER_GUESS
3703 s = qsort_cmp(u_right, pc_left);
3706 s = qsort_cmp(pc_left, u_left);
3707 /* if l < c, c < r - already in order - nothing to do */
3709 /* l < c, c == r - already in order, pc grows */
3711 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3713 /* l < c, c > r - need to know more */
3714 s = qsort_cmp(u_right, u_left);
3716 /* l < c, c > r, l < r - swap c & r to get ordered */
3717 qsort_swap(pc_left, u_left);
3718 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3719 } else if (s == 0) {
3720 /* l < c, c > r, l == r - swap c&r, grow pc */
3721 qsort_swap(pc_left, u_left);
3723 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3725 /* l < c, c > r, l > r - make lcr into rlc to get ordered */
3726 qsort_rotate(pc_left, u_right, u_left);
3727 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3730 } else if (s == 0) {
3732 s = qsort_cmp(pc_left, u_left);
3734 /* l == c, c < r - already in order, grow pc */
3736 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3737 } else if (s == 0) {
3738 /* l == c, c == r - already in order, grow pc both ways */
3741 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3743 /* l == c, c > r - swap l & r, grow pc */
3744 qsort_swap(u_right, u_left);
3746 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3750 s = qsort_cmp(pc_left, u_left);
3752 /* l > c, c < r - need to know more */
3753 s = qsort_cmp(u_right, u_left);
3755 /* l > c, c < r, l < r - swap l & c to get ordered */
3756 qsort_swap(u_right, pc_left);
3757 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3758 } else if (s == 0) {
3759 /* l > c, c < r, l == r - swap l & c, grow pc */
3760 qsort_swap(u_right, pc_left);
3762 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3764 /* l > c, c < r, l > r - rotate lcr into crl to order */
3765 qsort_rotate(u_right, pc_left, u_left);
3766 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3768 } else if (s == 0) {
3769 /* l > c, c == r - swap ends, grow pc */
3770 qsort_swap(u_right, u_left);
3772 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3774 /* l > c, c > r - swap ends to get in order */
3775 qsort_swap(u_right, u_left);
3776 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3779 /* We now know the 3 middle elements have been compared and
3780 arranged in the desired order, so we can shrink the uncompared
3785 qsort_all_asserts(pc_left, pc_right, u_left, u_right);
3787 /* The above massive nested if was the simple part :-). We now have
3788 the middle 3 elements ordered and we need to scan through the
3789 uncompared sets on either side, swapping elements that are on
3790 the wrong side or simply shuffling equal elements around to get
3791 all equal elements into the pivot chunk.
3795 int still_work_on_left;
3796 int still_work_on_right;
3798 /* Scan the uncompared values on the left. If I find a value
3799 equal to the pivot value, move it over so it is adjacent to
3800 the pivot chunk and expand the pivot chunk. If I find a value
3801 less than the pivot value, then just leave it - its already
3802 on the correct side of the partition. If I find a greater
3803 value, then stop the scan.
3805 while (still_work_on_left = (u_right >= part_left)) {
3806 s = qsort_cmp(u_right, pc_left);
3809 } else if (s == 0) {
3811 if (pc_left != u_right) {
3812 qsort_swap(u_right, pc_left);
3818 qsort_assert(u_right < pc_left);
3819 qsort_assert(pc_left <= pc_right);
3820 qsort_assert(qsort_cmp(u_right + 1, pc_left) <= 0);
3821 qsort_assert(qsort_cmp(pc_left, pc_right) == 0);
3824 /* Do a mirror image scan of uncompared values on the right
3826 while (still_work_on_right = (u_left <= part_right)) {
3827 s = qsort_cmp(pc_right, u_left);
3830 } else if (s == 0) {
3832 if (pc_right != u_left) {
3833 qsort_swap(pc_right, u_left);
3839 qsort_assert(u_left > pc_right);
3840 qsort_assert(pc_left <= pc_right);
3841 qsort_assert(qsort_cmp(pc_right, u_left - 1) <= 0);
3842 qsort_assert(qsort_cmp(pc_left, pc_right) == 0);
3845 if (still_work_on_left) {
3846 /* I know I have a value on the left side which needs to be
3847 on the right side, but I need to know more to decide
3848 exactly the best thing to do with it.
3850 if (still_work_on_right) {
3851 /* I know I have values on both side which are out of
3852 position. This is a big win because I kill two birds
3853 with one swap (so to speak). I can advance the
3854 uncompared pointers on both sides after swapping both
3855 of them into the right place.
3857 qsort_swap(u_right, u_left);
3860 qsort_all_asserts(pc_left, pc_right, u_left, u_right);
3862 /* I have an out of position value on the left, but the
3863 right is fully scanned, so I "slide" the pivot chunk
3864 and any less-than values left one to make room for the
3865 greater value over on the right. If the out of position
3866 value is immediately adjacent to the pivot chunk (there
3867 are no less-than values), I can do that with a swap,
3868 otherwise, I have to rotate one of the less than values
3869 into the former position of the out of position value
3870 and the right end of the pivot chunk into the left end
3874 if (pc_left == u_right) {
3875 qsort_swap(u_right, pc_right);
3876 qsort_all_asserts(pc_left, pc_right-1, u_left, u_right-1);
3878 qsort_rotate(u_right, pc_left, pc_right);
3879 qsort_all_asserts(pc_left, pc_right-1, u_left, u_right-1);
3884 } else if (still_work_on_right) {
3885 /* Mirror image of complex case above: I have an out of
3886 position value on the right, but the left is fully
3887 scanned, so I need to shuffle things around to make room
3888 for the right value on the left.
3891 if (pc_right == u_left) {
3892 qsort_swap(u_left, pc_left);
3893 qsort_all_asserts(pc_left+1, pc_right, u_left+1, u_right);
3895 qsort_rotate(pc_right, pc_left, u_left);
3896 qsort_all_asserts(pc_left+1, pc_right, u_left+1, u_right);
3901 /* No more scanning required on either side of partition,
3902 break out of loop and figure out next set of partitions
3908 /* The elements in the pivot chunk are now in the right place. They
3909 will never move or be compared again. All I have to do is decide
3910 what to do with the stuff to the left and right of the pivot
3913 Notes on the QSORT_ORDER_GUESS ifdef code:
3915 1. If I just built these partitions without swapping any (or
3916 very many) elements, there is a chance that the elements are
3917 already ordered properly (being properly ordered will
3918 certainly result in no swapping, but the converse can't be
3921 2. A (properly written) insertion sort will run faster on
3922 already ordered data than qsort will.
3924 3. Perhaps there is some way to make a good guess about
3925 switching to an insertion sort earlier than partition size 6
3926 (for instance - we could save the partition size on the stack
3927 and increase the size each time we find we didn't swap, thus
3928 switching to insertion sort earlier for partitions with a
3929 history of not swapping).
3931 4. Naturally, if I just switch right away, it will make
3932 artificial benchmarks with pure ascending (or descending)
3933 data look really good, but is that a good reason in general?
3937 #ifdef QSORT_ORDER_GUESS
3939 #if QSORT_ORDER_GUESS == 1
3940 qsort_break_even = (part_right - part_left) + 1;
3942 #if QSORT_ORDER_GUESS == 2
3943 qsort_break_even *= 2;
3945 #if QSORT_ORDER_GUESS == 3
3946 int prev_break = qsort_break_even;
3947 qsort_break_even *= qsort_break_even;
3948 if (qsort_break_even < prev_break) {
3949 qsort_break_even = (part_right - part_left) + 1;
3953 qsort_break_even = QSORT_BREAK_EVEN;
3957 if (part_left < pc_left) {
3958 /* There are elements on the left which need more processing.
3959 Check the right as well before deciding what to do.
3961 if (pc_right < part_right) {
3962 /* We have two partitions to be sorted. Stack the biggest one
3963 and process the smallest one on the next iteration. This
3964 minimizes the stack height by insuring that any additional
3965 stack entries must come from the smallest partition which
3966 (because it is smallest) will have the fewest
3967 opportunities to generate additional stack entries.
3969 if ((part_right - pc_right) > (pc_left - part_left)) {
3970 /* stack the right partition, process the left */
3971 partition_stack[next_stack_entry].left = pc_right + 1;
3972 partition_stack[next_stack_entry].right = part_right;
3973 #ifdef QSORT_ORDER_GUESS
3974 partition_stack[next_stack_entry].qsort_break_even = qsort_break_even;
3976 part_right = pc_left - 1;
3978 /* stack the left partition, process the right */
3979 partition_stack[next_stack_entry].left = part_left;
3980 partition_stack[next_stack_entry].right = pc_left - 1;
3981 #ifdef QSORT_ORDER_GUESS
3982 partition_stack[next_stack_entry].qsort_break_even = qsort_break_even;
3984 part_left = pc_right + 1;
3986 qsort_assert(next_stack_entry < QSORT_MAX_STACK);
3989 /* The elements on the left are the only remaining elements
3990 that need sorting, arrange for them to be processed as the
3993 part_right = pc_left - 1;
3995 } else if (pc_right < part_right) {
3996 /* There is only one chunk on the right to be sorted, make it
3997 the new partition and loop back around.
3999 part_left = pc_right + 1;
4001 /* This whole partition wound up in the pivot chunk, so
4002 we need to get a new partition off the stack.
4004 if (next_stack_entry == 0) {
4005 /* the stack is empty - we are done */
4009 part_left = partition_stack[next_stack_entry].left;
4010 part_right = partition_stack[next_stack_entry].right;
4011 #ifdef QSORT_ORDER_GUESS
4012 qsort_break_even = partition_stack[next_stack_entry].qsort_break_even;
4016 /* This partition is too small to fool with qsort complexity, just
4017 do an ordinary insertion sort to minimize overhead.
4020 /* Assume 1st element is in right place already, and start checking
4021 at 2nd element to see where it should be inserted.
4023 for (i = part_left + 1; i <= part_right; ++i) {
4025 /* Scan (backwards - just in case 'i' is already in right place)
4026 through the elements already sorted to see if the ith element
4027 belongs ahead of one of them.
4029 for (j = i - 1; j >= part_left; --j) {
4030 if (qsort_cmp(i, j) >= 0) {
4031 /* i belongs right after j
4038 /* Looks like we really need to move some things
4042 for (k = i - 1; k >= j; --k)
4043 array[k + 1] = array[k];
4048 /* That partition is now sorted, grab the next one, or get out
4049 of the loop if there aren't any more.
4052 if (next_stack_entry == 0) {
4053 /* the stack is empty - we are done */
4057 part_left = partition_stack[next_stack_entry].left;
4058 part_right = partition_stack[next_stack_entry].right;
4059 #ifdef QSORT_ORDER_GUESS
4060 qsort_break_even = partition_stack[next_stack_entry].qsort_break_even;
4065 /* Believe it or not, the array is sorted at this point! */
4078 sortcv(pTHXo_ SV *a, SV *b)
4081 I32 oldsaveix = PL_savestack_ix;
4082 I32 oldscopeix = PL_scopestack_ix;
4084 GvSV(PL_firstgv) = a;
4085 GvSV(PL_secondgv) = b;
4086 PL_stack_sp = PL_stack_base;
4089 if (PL_stack_sp != PL_stack_base + 1)
4090 Perl_croak(aTHX_ "Sort subroutine didn't return single value");
4091 if (!SvNIOKp(*PL_stack_sp))
4092 Perl_croak(aTHX_ "Sort subroutine didn't return a numeric value");
4093 result = SvIV(*PL_stack_sp);
4094 while (PL_scopestack_ix > oldscopeix) {
4097 leave_scope(oldsaveix);
4103 sv_ncmp(pTHXo_ SV *a, SV *b)
4107 return nv1 < nv2 ? -1 : nv1 > nv2 ? 1 : 0;
4111 sv_i_ncmp(pTHXo_ SV *a, SV *b)
4115 return iv1 < iv2 ? -1 : iv1 > iv2 ? 1 : 0;
4117 #define tryCALL_AMAGICbin(left,right,meth,svp) STMT_START { \
4119 if (PL_amagic_generation) { \
4120 if (SvAMAGIC(left)||SvAMAGIC(right))\
4121 *svp = amagic_call(left, \
4129 amagic_ncmp(pTHXo_ register SV *a, register SV *b)
4132 tryCALL_AMAGICbin(a,b,ncmp,&tmpsv);
4137 I32 i = SvIVX(tmpsv);
4147 return sv_ncmp(aTHXo_ a, b);
4151 amagic_i_ncmp(pTHXo_ register SV *a, register SV *b)
4154 tryCALL_AMAGICbin(a,b,ncmp,&tmpsv);
4159 I32 i = SvIVX(tmpsv);
4169 return sv_i_ncmp(aTHXo_ a, b);
4173 amagic_cmp(pTHXo_ register SV *str1, register SV *str2)
4176 tryCALL_AMAGICbin(str1,str2,scmp,&tmpsv);
4181 I32 i = SvIVX(tmpsv);
4191 return sv_cmp(str1, str2);
4195 amagic_cmp_locale(pTHXo_ register SV *str1, register SV *str2)
4198 tryCALL_AMAGICbin(str1,str2,scmp,&tmpsv);
4203 I32 i = SvIVX(tmpsv);
4213 return sv_cmp_locale(str1, str2);
4217 run_user_filter(pTHXo_ int idx, SV *buf_sv, int maxlen)
4219 SV *datasv = FILTER_DATA(idx);
4220 int filter_has_file = IoLINES(datasv);
4221 GV *filter_child_proc = (GV *)IoFMT_GV(datasv);
4222 SV *filter_state = (SV *)IoTOP_GV(datasv);
4223 SV *filter_sub = (SV *)IoBOTTOM_GV(datasv);
4226 /* I was having segfault trouble under Linux 2.2.5 after a
4227 parse error occured. (Had to hack around it with a test
4228 for PL_error_count == 0.) Solaris doesn't segfault --
4229 not sure where the trouble is yet. XXX */
4231 if (filter_has_file) {
4232 len = FILTER_READ(idx+1, buf_sv, maxlen);
4235 if (filter_sub && len >= 0) {
4246 PUSHs(sv_2mortal(newSViv(maxlen)));
4248 PUSHs(filter_state);
4251 count = call_sv(filter_sub, G_SCALAR);
4267 IoLINES(datasv) = 0;
4268 if (filter_child_proc) {
4269 SvREFCNT_dec(filter_child_proc);
4270 IoFMT_GV(datasv) = Nullgv;
4273 SvREFCNT_dec(filter_state);
4274 IoTOP_GV(datasv) = Nullgv;
4277 SvREFCNT_dec(filter_sub);
4278 IoBOTTOM_GV(datasv) = Nullgv;
4280 filter_del(run_user_filter);
4289 sv_cmp_locale_static(pTHXo_ register SV *str1, register SV *str2)
4291 return sv_cmp_locale(str1, str2);
4295 sv_cmp_static(pTHXo_ register SV *str1, register SV *str2)
4297 return sv_cmp(str1, str2);
4300 #endif /* PERL_OBJECT */