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++ = PTR2UV(RX_MATCH_COPIED(rx) ? rx->subbeg : Nullch);
227 RX_MATCH_COPIED_off(rx);
231 *p++ = PTR2UV(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 = INT2PTR(char*,*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(INT2PTR(char*,*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(Perl_debug_log, "%-16s%ld\n", name, (long) arg);
335 PerlIO_printf(Perl_debug_log, "%-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 DIE(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) {
1191 cx = &cxstack[cxstack_ix];
1192 DEBUG_l(PerlIO_printf(Perl_debug_log, "Unwinding block %ld, type %s\n",
1193 (long) cxstack_ix, PL_block_type[CxTYPE(cx)]));
1194 /* Note: we don't need to restore the base context info till the end. */
1195 switch (CxTYPE(cx)) {
1198 continue; /* not break */
1217 * Closures mentioned at top level of eval cannot be referenced
1218 * again, and their presence indirectly causes a memory leak.
1219 * (Note that the fact that compcv and friends are still set here
1220 * is, AFAIK, an accident.) --Chip
1222 * XXX need to get comppad et al from eval's cv rather than
1223 * relying on the incidental global values.
1226 S_free_closures(pTHX)
1229 SV **svp = AvARRAY(PL_comppad_name);
1231 for (ix = AvFILLp(PL_comppad_name); ix >= 0; ix--) {
1233 if (sv && sv != &PL_sv_undef && *SvPVX(sv) == '&') {
1235 svp[ix] = &PL_sv_undef;
1239 SvREFCNT_dec(CvOUTSIDE(sv));
1240 CvOUTSIDE(sv) = Nullcv;
1253 Perl_qerror(pTHX_ SV *err)
1256 sv_catsv(ERRSV, err);
1258 sv_catsv(PL_errors, err);
1260 Perl_warn(aTHX_ "%_", err);
1265 Perl_die_where(pTHX_ char *message, STRLEN msglen)
1271 register PERL_CONTEXT *cx;
1276 if (PL_in_eval & EVAL_KEEPERR) {
1277 static char prefix[] = "\t(in cleanup) ";
1282 else if (SvCUR(err) >= sizeof(prefix)+msglen-1) {
1285 if (*e != *message || strNE(e,message))
1289 SvGROW(err, SvCUR(err)+sizeof(prefix)+msglen);
1290 sv_catpvn(err, prefix, sizeof(prefix)-1);
1291 sv_catpvn(err, message, msglen);
1292 if (ckWARN(WARN_UNSAFE)) {
1293 STRLEN start = SvCUR(err)-msglen-sizeof(prefix)+1;
1294 Perl_warner(aTHX_ WARN_UNSAFE, SvPVX(err)+start);
1299 sv_setpvn(ERRSV, message, msglen);
1302 message = SvPVx(ERRSV, msglen);
1304 while ((cxix = dopoptoeval(cxstack_ix)) < 0
1305 && PL_curstackinfo->si_prev)
1314 if (cxix < cxstack_ix)
1317 POPBLOCK(cx,PL_curpm);
1318 if (CxTYPE(cx) != CXt_EVAL) {
1319 PerlIO_write(Perl_error_log, "panic: die ", 11);
1320 PerlIO_write(Perl_error_log, message, msglen);
1325 if (gimme == G_SCALAR)
1326 *++newsp = &PL_sv_undef;
1327 PL_stack_sp = newsp;
1331 if (optype == OP_REQUIRE) {
1332 char* msg = SvPVx(ERRSV, n_a);
1333 DIE(aTHX_ "%sCompilation failed in require",
1334 *msg ? msg : "Unknown error\n");
1336 return pop_return();
1340 message = SvPVx(ERRSV, msglen);
1343 /* SFIO can really mess with your errno */
1346 PerlIO *serr = Perl_error_log;
1348 PerlIO_write(serr, message, msglen);
1349 (void)PerlIO_flush(serr);
1362 if (SvTRUE(left) != SvTRUE(right))
1374 RETURNOP(cLOGOP->op_other);
1383 RETURNOP(cLOGOP->op_other);
1389 register I32 cxix = dopoptosub(cxstack_ix);
1390 register PERL_CONTEXT *cx;
1391 register PERL_CONTEXT *ccstack = cxstack;
1392 PERL_SI *top_si = PL_curstackinfo;
1403 /* we may be in a higher stacklevel, so dig down deeper */
1404 while (cxix < 0 && top_si->si_type != PERLSI_MAIN) {
1405 top_si = top_si->si_prev;
1406 ccstack = top_si->si_cxstack;
1407 cxix = dopoptosub_at(ccstack, top_si->si_cxix);
1410 if (GIMME != G_ARRAY)
1414 if (PL_DBsub && cxix >= 0 &&
1415 ccstack[cxix].blk_sub.cv == GvCV(PL_DBsub))
1419 cxix = dopoptosub_at(ccstack, cxix - 1);
1422 cx = &ccstack[cxix];
1423 if (CxTYPE(cx) == CXt_SUB) {
1424 dbcxix = dopoptosub_at(ccstack, cxix - 1);
1425 /* We expect that ccstack[dbcxix] is CXt_SUB, anyway, the
1426 field below is defined for any cx. */
1427 if (PL_DBsub && dbcxix >= 0 && ccstack[dbcxix].blk_sub.cv == GvCV(PL_DBsub))
1428 cx = &ccstack[dbcxix];
1431 if (GIMME != G_ARRAY) {
1432 hv = cx->blk_oldcop->cop_stash;
1434 PUSHs(&PL_sv_undef);
1437 sv_setpv(TARG, HvNAME(hv));
1443 hv = cx->blk_oldcop->cop_stash;
1445 PUSHs(&PL_sv_undef);
1447 PUSHs(sv_2mortal(newSVpv(HvNAME(hv), 0)));
1448 PUSHs(sv_2mortal(newSVsv(CopFILESV(cx->blk_oldcop))));
1449 PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->cop_line)));
1452 if (CxTYPE(cx) == CXt_SUB) { /* So is ccstack[dbcxix]. */
1454 gv_efullname3(sv, CvGV(ccstack[cxix].blk_sub.cv), Nullch);
1455 PUSHs(sv_2mortal(sv));
1456 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
1459 PUSHs(sv_2mortal(newSVpvn("(eval)",6)));
1460 PUSHs(sv_2mortal(newSViv(0)));
1462 gimme = (I32)cx->blk_gimme;
1463 if (gimme == G_VOID)
1464 PUSHs(&PL_sv_undef);
1466 PUSHs(sv_2mortal(newSViv(gimme & G_ARRAY)));
1467 if (CxTYPE(cx) == CXt_EVAL) {
1468 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
1469 PUSHs(cx->blk_eval.cur_text);
1472 else if (cx->blk_eval.old_name) { /* Try blocks have old_name == 0. */
1473 /* Require, put the name. */
1474 PUSHs(sv_2mortal(newSVpv(cx->blk_eval.old_name, 0)));
1479 PUSHs(&PL_sv_undef);
1480 PUSHs(&PL_sv_undef);
1482 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs
1483 && PL_curcop->cop_stash == PL_debstash)
1485 AV *ary = cx->blk_sub.argarray;
1486 int off = AvARRAY(ary) - AvALLOC(ary);
1490 PL_dbargs = GvAV(gv_AVadd(tmpgv = gv_fetchpv("DB::args", TRUE,
1493 AvREAL_off(PL_dbargs); /* XXX Should be REIFY */
1496 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1497 av_extend(PL_dbargs, AvFILLp(ary) + off);
1498 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1499 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
1501 /* XXX only hints propagated via op_private are currently
1502 * visible (others are not easily accessible, since they
1503 * use the global PL_hints) */
1504 PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->op_private &
1505 HINT_PRIVATE_MASK)));
1519 sv_reset(tmps, PL_curcop->cop_stash);
1531 PL_curcop = (COP*)PL_op;
1532 TAINT_NOT; /* Each statement is presumed innocent */
1533 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
1536 if (PL_op->op_private || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
1540 register PERL_CONTEXT *cx;
1541 I32 gimme = G_ARRAY;
1548 DIE(aTHX_ "No DB::DB routine defined");
1550 if (CvDEPTH(cv) >= 1 && !(PL_debug & (1<<30))) /* don't do recursive DB::DB call */
1562 push_return(PL_op->op_next);
1563 PUSHBLOCK(cx, CXt_SUB, SP);
1566 (void)SvREFCNT_inc(cv);
1567 SAVESPTR(PL_curpad);
1568 PL_curpad = AvARRAY((AV*)*av_fetch(CvPADLIST(cv),1,FALSE));
1569 RETURNOP(CvSTART(cv));
1583 register PERL_CONTEXT *cx;
1584 I32 gimme = GIMME_V;
1591 if (PL_op->op_flags & OPf_SPECIAL) {
1593 svp = &THREADSV(PL_op->op_targ); /* per-thread variable */
1594 SAVEGENERICSV(*svp);
1598 #endif /* USE_THREADS */
1599 if (PL_op->op_targ) {
1600 svp = &PL_curpad[PL_op->op_targ]; /* "my" variable */
1604 svp = &GvSV((GV*)POPs); /* symbol table variable */
1605 SAVEGENERICSV(*svp);
1611 PUSHBLOCK(cx, CXt_LOOP, SP);
1612 PUSHLOOP(cx, svp, MARK);
1613 if (PL_op->op_flags & OPf_STACKED) {
1614 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
1615 if (SvTYPE(cx->blk_loop.iterary) != SVt_PVAV) {
1617 if (SvNIOKp(sv) || !SvPOKp(sv) ||
1618 (looks_like_number(sv) && *SvPVX(sv) != '0')) {
1619 if (SvNV(sv) < IV_MIN ||
1620 SvNV((SV*)cx->blk_loop.iterary) >= IV_MAX)
1621 DIE(aTHX_ "Range iterator outside integer range");
1622 cx->blk_loop.iterix = SvIV(sv);
1623 cx->blk_loop.itermax = SvIV((SV*)cx->blk_loop.iterary);
1626 cx->blk_loop.iterlval = newSVsv(sv);
1630 cx->blk_loop.iterary = PL_curstack;
1631 AvFILLp(PL_curstack) = SP - PL_stack_base;
1632 cx->blk_loop.iterix = MARK - PL_stack_base;
1641 register PERL_CONTEXT *cx;
1642 I32 gimme = GIMME_V;
1648 PUSHBLOCK(cx, CXt_LOOP, SP);
1649 PUSHLOOP(cx, 0, SP);
1657 register PERL_CONTEXT *cx;
1665 newsp = PL_stack_base + cx->blk_loop.resetsp;
1668 if (gimme == G_VOID)
1670 else if (gimme == G_SCALAR) {
1672 *++newsp = sv_mortalcopy(*SP);
1674 *++newsp = &PL_sv_undef;
1678 *++newsp = sv_mortalcopy(*++mark);
1679 TAINT_NOT; /* Each item is independent */
1685 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
1686 PL_curpm = newpm; /* ... and pop $1 et al */
1698 register PERL_CONTEXT *cx;
1699 bool popsub2 = FALSE;
1706 if (PL_curstackinfo->si_type == PERLSI_SORT) {
1707 if (cxstack_ix == PL_sortcxix || dopoptosub(cxstack_ix) <= PL_sortcxix) {
1708 if (cxstack_ix > PL_sortcxix)
1709 dounwind(PL_sortcxix);
1710 AvARRAY(PL_curstack)[1] = *SP;
1711 PL_stack_sp = PL_stack_base + 1;
1716 cxix = dopoptosub(cxstack_ix);
1718 DIE(aTHX_ "Can't return outside a subroutine");
1719 if (cxix < cxstack_ix)
1723 switch (CxTYPE(cx)) {
1729 if (AvFILLp(PL_comppad_name) >= 0)
1732 if (optype == OP_REQUIRE &&
1733 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
1735 /* Unassume the success we assumed earlier. */
1736 char *name = cx->blk_eval.old_name;
1737 (void)hv_delete(GvHVn(PL_incgv), name, strlen(name), G_DISCARD);
1738 DIE(aTHX_ "%s did not return a true value", name);
1742 DIE(aTHX_ "panic: return");
1746 if (gimme == G_SCALAR) {
1749 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
1751 *++newsp = SvREFCNT_inc(*SP);
1756 *++newsp = sv_mortalcopy(*SP);
1759 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
1761 *++newsp = sv_mortalcopy(*SP);
1763 *++newsp = &PL_sv_undef;
1765 else if (gimme == G_ARRAY) {
1766 while (++MARK <= SP) {
1767 *++newsp = (popsub2 && SvTEMP(*MARK))
1768 ? *MARK : sv_mortalcopy(*MARK);
1769 TAINT_NOT; /* Each item is independent */
1772 PL_stack_sp = newsp;
1774 /* Stack values are safe: */
1776 POPSUB(cx,sv); /* release CV and @_ ... */
1780 PL_curpm = newpm; /* ... and pop $1 et al */
1784 return pop_return();
1791 register PERL_CONTEXT *cx;
1801 if (PL_op->op_flags & OPf_SPECIAL) {
1802 cxix = dopoptoloop(cxstack_ix);
1804 DIE(aTHX_ "Can't \"last\" outside a block");
1807 cxix = dopoptolabel(cPVOP->op_pv);
1809 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
1811 if (cxix < cxstack_ix)
1816 switch (CxTYPE(cx)) {
1819 newsp = PL_stack_base + cx->blk_loop.resetsp;
1820 nextop = cx->blk_loop.last_op->op_next;
1824 nextop = pop_return();
1828 nextop = pop_return();
1831 DIE(aTHX_ "panic: last");
1835 if (gimme == G_SCALAR) {
1837 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
1838 ? *SP : sv_mortalcopy(*SP);
1840 *++newsp = &PL_sv_undef;
1842 else if (gimme == G_ARRAY) {
1843 while (++MARK <= SP) {
1844 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
1845 ? *MARK : sv_mortalcopy(*MARK);
1846 TAINT_NOT; /* Each item is independent */
1852 /* Stack values are safe: */
1855 POPLOOP(cx); /* release loop vars ... */
1859 POPSUB(cx,sv); /* release CV and @_ ... */
1862 PL_curpm = newpm; /* ... and pop $1 et al */
1872 register PERL_CONTEXT *cx;
1875 if (PL_op->op_flags & OPf_SPECIAL) {
1876 cxix = dopoptoloop(cxstack_ix);
1878 DIE(aTHX_ "Can't \"next\" outside a block");
1881 cxix = dopoptolabel(cPVOP->op_pv);
1883 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
1885 if (cxix < cxstack_ix)
1889 oldsave = PL_scopestack[PL_scopestack_ix - 1];
1890 LEAVE_SCOPE(oldsave);
1891 return cx->blk_loop.next_op;
1897 register PERL_CONTEXT *cx;
1900 if (PL_op->op_flags & OPf_SPECIAL) {
1901 cxix = dopoptoloop(cxstack_ix);
1903 DIE(aTHX_ "Can't \"redo\" outside a block");
1906 cxix = dopoptolabel(cPVOP->op_pv);
1908 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
1910 if (cxix < cxstack_ix)
1914 oldsave = PL_scopestack[PL_scopestack_ix - 1];
1915 LEAVE_SCOPE(oldsave);
1916 return cx->blk_loop.redo_op;
1920 S_dofindlabel(pTHX_ OP *o, char *label, OP **opstack, OP **oplimit)
1924 static char too_deep[] = "Target of goto is too deeply nested";
1927 Perl_croak(aTHX_ too_deep);
1928 if (o->op_type == OP_LEAVE ||
1929 o->op_type == OP_SCOPE ||
1930 o->op_type == OP_LEAVELOOP ||
1931 o->op_type == OP_LEAVETRY)
1933 *ops++ = cUNOPo->op_first;
1935 Perl_croak(aTHX_ too_deep);
1938 if (o->op_flags & OPf_KIDS) {
1940 /* First try all the kids at this level, since that's likeliest. */
1941 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
1942 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
1943 kCOP->cop_label && strEQ(kCOP->cop_label, label))
1946 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
1947 if (kid == PL_lastgotoprobe)
1949 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
1951 (ops[-1]->op_type != OP_NEXTSTATE &&
1952 ops[-1]->op_type != OP_DBSTATE)))
1954 if (o = dofindlabel(kid, label, ops, oplimit))
1973 register PERL_CONTEXT *cx;
1974 #define GOTO_DEPTH 64
1975 OP *enterops[GOTO_DEPTH];
1977 int do_dump = (PL_op->op_type == OP_DUMP);
1978 static char must_have_label[] = "goto must have label";
1981 if (PL_op->op_flags & OPf_STACKED) {
1985 /* This egregious kludge implements goto &subroutine */
1986 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
1988 register PERL_CONTEXT *cx;
1989 CV* cv = (CV*)SvRV(sv);
1995 if (!CvROOT(cv) && !CvXSUB(cv)) {
2000 /* autoloaded stub? */
2001 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2003 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2004 GvNAMELEN(gv), FALSE);
2005 if (autogv && (cv = GvCV(autogv)))
2007 tmpstr = sv_newmortal();
2008 gv_efullname3(tmpstr, gv, Nullch);
2009 DIE(aTHX_ "Goto undefined subroutine &%s",SvPVX(tmpstr));
2011 DIE(aTHX_ "Goto undefined subroutine");
2014 /* First do some returnish stuff. */
2015 cxix = dopoptosub(cxstack_ix);
2017 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
2018 if (cxix < cxstack_ix)
2021 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_ENTEREVAL)
2022 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2024 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs) {
2025 /* put @_ back onto stack */
2026 AV* av = cx->blk_sub.argarray;
2028 items = AvFILLp(av) + 1;
2030 EXTEND(PL_stack_sp, items); /* @_ could have been extended. */
2031 Copy(AvARRAY(av), PL_stack_sp, items, SV*);
2032 PL_stack_sp += items;
2034 SvREFCNT_dec(GvAV(PL_defgv));
2035 GvAV(PL_defgv) = cx->blk_sub.savearray;
2036 #endif /* USE_THREADS */
2037 /* abandon @_ if it got reified */
2039 (void)sv_2mortal((SV*)av); /* delay until return */
2041 av_extend(av, items-1);
2042 AvFLAGS(av) = AVf_REIFY;
2043 PL_curpad[0] = (SV*)(cx->blk_sub.argarray = av);
2046 else if (CvXSUB(cv)) { /* put GvAV(defgv) back onto stack */
2050 av = (AV*)PL_curpad[0];
2052 av = GvAV(PL_defgv);
2054 items = AvFILLp(av) + 1;
2056 EXTEND(PL_stack_sp, items); /* @_ could have been extended. */
2057 Copy(AvARRAY(av), PL_stack_sp, items, SV*);
2058 PL_stack_sp += items;
2060 if (CxTYPE(cx) == CXt_SUB &&
2061 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
2062 SvREFCNT_dec(cx->blk_sub.cv);
2063 oldsave = PL_scopestack[PL_scopestack_ix - 1];
2064 LEAVE_SCOPE(oldsave);
2066 /* Now do some callish stuff. */
2069 #ifdef PERL_XSUB_OLDSTYLE
2070 if (CvOLDSTYLE(cv)) {
2071 I32 (*fp3)(int,int,int);
2076 fp3 = (I32(*)(int,int,int)))CvXSUB(cv;
2077 items = (*fp3)(CvXSUBANY(cv).any_i32,
2078 mark - PL_stack_base + 1,
2080 SP = PL_stack_base + items;
2083 #endif /* PERL_XSUB_OLDSTYLE */
2088 PL_stack_sp--; /* There is no cv arg. */
2089 /* Push a mark for the start of arglist */
2091 (void)(*CvXSUB(cv))(aTHXo_ cv);
2092 /* Pop the current context like a decent sub should */
2093 POPBLOCK(cx, PL_curpm);
2094 /* Do _not_ use PUTBACK, keep the XSUB's return stack! */
2097 return pop_return();
2100 AV* padlist = CvPADLIST(cv);
2101 SV** svp = AvARRAY(padlist);
2102 if (CxTYPE(cx) == CXt_EVAL) {
2103 PL_in_eval = cx->blk_eval.old_in_eval;
2104 PL_eval_root = cx->blk_eval.old_eval_root;
2105 cx->cx_type = CXt_SUB;
2106 cx->blk_sub.hasargs = 0;
2108 cx->blk_sub.cv = cv;
2109 cx->blk_sub.olddepth = CvDEPTH(cv);
2111 if (CvDEPTH(cv) < 2)
2112 (void)SvREFCNT_inc(cv);
2113 else { /* save temporaries on recursion? */
2114 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION))
2115 sub_crush_depth(cv);
2116 if (CvDEPTH(cv) > AvFILLp(padlist)) {
2117 AV *newpad = newAV();
2118 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
2119 I32 ix = AvFILLp((AV*)svp[1]);
2120 svp = AvARRAY(svp[0]);
2121 for ( ;ix > 0; ix--) {
2122 if (svp[ix] != &PL_sv_undef) {
2123 char *name = SvPVX(svp[ix]);
2124 if ((SvFLAGS(svp[ix]) & SVf_FAKE)
2127 /* outer lexical or anon code */
2128 av_store(newpad, ix,
2129 SvREFCNT_inc(oldpad[ix]) );
2131 else { /* our own lexical */
2133 av_store(newpad, ix, sv = (SV*)newAV());
2134 else if (*name == '%')
2135 av_store(newpad, ix, sv = (SV*)newHV());
2137 av_store(newpad, ix, sv = NEWSV(0,0));
2142 av_store(newpad, ix, sv = NEWSV(0,0));
2146 if (cx->blk_sub.hasargs) {
2149 av_store(newpad, 0, (SV*)av);
2150 AvFLAGS(av) = AVf_REIFY;
2152 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
2153 AvFILLp(padlist) = CvDEPTH(cv);
2154 svp = AvARRAY(padlist);
2158 if (!cx->blk_sub.hasargs) {
2159 AV* av = (AV*)PL_curpad[0];
2161 items = AvFILLp(av) + 1;
2163 /* Mark is at the end of the stack. */
2165 Copy(AvARRAY(av), SP + 1, items, SV*);
2170 #endif /* USE_THREADS */
2171 SAVESPTR(PL_curpad);
2172 PL_curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
2174 if (cx->blk_sub.hasargs)
2175 #endif /* USE_THREADS */
2177 AV* av = (AV*)PL_curpad[0];
2181 cx->blk_sub.savearray = GvAV(PL_defgv);
2182 GvAV(PL_defgv) = (AV*)SvREFCNT_inc(av);
2183 #endif /* USE_THREADS */
2184 cx->blk_sub.argarray = av;
2187 if (items >= AvMAX(av) + 1) {
2189 if (AvARRAY(av) != ary) {
2190 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
2191 SvPVX(av) = (char*)ary;
2193 if (items >= AvMAX(av) + 1) {
2194 AvMAX(av) = items - 1;
2195 Renew(ary,items+1,SV*);
2197 SvPVX(av) = (char*)ary;
2200 Copy(mark,AvARRAY(av),items,SV*);
2201 AvFILLp(av) = items - 1;
2202 assert(!AvREAL(av));
2209 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
2211 * We do not care about using sv to call CV;
2212 * it's for informational purposes only.
2214 SV *sv = GvSV(PL_DBsub);
2217 if (PERLDB_SUB_NN) {
2218 SvIVX(sv) = PTR2IV(cv); /* Already upgraded, saved */
2221 gv_efullname3(sv, CvGV(cv), Nullch);
2224 && (gotocv = get_cv("DB::goto", FALSE)) ) {
2225 PUSHMARK( PL_stack_sp );
2226 call_sv((SV*)gotocv, G_SCALAR | G_NODEBUG);
2230 RETURNOP(CvSTART(cv));
2234 label = SvPV(sv,n_a);
2235 if (!(do_dump || *label))
2236 DIE(aTHX_ must_have_label);
2239 else if (PL_op->op_flags & OPf_SPECIAL) {
2241 DIE(aTHX_ must_have_label);
2244 label = cPVOP->op_pv;
2246 if (label && *label) {
2251 PL_lastgotoprobe = 0;
2253 for (ix = cxstack_ix; ix >= 0; ix--) {
2255 switch (CxTYPE(cx)) {
2257 gotoprobe = PL_eval_root; /* XXX not good for nested eval */
2260 gotoprobe = cx->blk_oldcop->op_sibling;
2266 gotoprobe = cx->blk_oldcop->op_sibling;
2268 gotoprobe = PL_main_root;
2271 if (CvDEPTH(cx->blk_sub.cv)) {
2272 gotoprobe = CvROOT(cx->blk_sub.cv);
2277 DIE(aTHX_ "Can't \"goto\" outside a block");
2280 DIE(aTHX_ "panic: goto");
2281 gotoprobe = PL_main_root;
2284 retop = dofindlabel(gotoprobe, label,
2285 enterops, enterops + GOTO_DEPTH);
2288 PL_lastgotoprobe = gotoprobe;
2291 DIE(aTHX_ "Can't find label %s", label);
2293 /* pop unwanted frames */
2295 if (ix < cxstack_ix) {
2302 oldsave = PL_scopestack[PL_scopestack_ix];
2303 LEAVE_SCOPE(oldsave);
2306 /* push wanted frames */
2308 if (*enterops && enterops[1]) {
2310 for (ix = 1; enterops[ix]; ix++) {
2311 PL_op = enterops[ix];
2312 /* Eventually we may want to stack the needed arguments
2313 * for each op. For now, we punt on the hard ones. */
2314 if (PL_op->op_type == OP_ENTERITER)
2315 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop",
2317 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
2325 if (!retop) retop = PL_main_start;
2327 PL_restartop = retop;
2328 PL_do_undump = TRUE;
2332 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2333 PL_do_undump = FALSE;
2349 if (anum == 1 && VMSISH_EXIT)
2354 PUSHs(&PL_sv_undef);
2362 NV value = SvNVx(GvSV(cCOP->cop_gv));
2363 register I32 match = I_32(value);
2366 if (((NV)match) > value)
2367 --match; /* was fractional--truncate other way */
2369 match -= cCOP->uop.scop.scop_offset;
2372 else if (match > cCOP->uop.scop.scop_max)
2373 match = cCOP->uop.scop.scop_max;
2374 PL_op = cCOP->uop.scop.scop_next[match];
2384 PL_op = PL_op->op_next; /* can't assume anything */
2387 match = *(SvPVx(GvSV(cCOP->cop_gv), n_a)) & 255;
2388 match -= cCOP->uop.scop.scop_offset;
2391 else if (match > cCOP->uop.scop.scop_max)
2392 match = cCOP->uop.scop.scop_max;
2393 PL_op = cCOP->uop.scop.scop_next[match];
2402 S_save_lines(pTHX_ AV *array, SV *sv)
2404 register char *s = SvPVX(sv);
2405 register char *send = SvPVX(sv) + SvCUR(sv);
2407 register I32 line = 1;
2409 while (s && s < send) {
2410 SV *tmpstr = NEWSV(85,0);
2412 sv_upgrade(tmpstr, SVt_PVMG);
2413 t = strchr(s, '\n');
2419 sv_setpvn(tmpstr, s, t - s);
2420 av_store(array, line++, tmpstr);
2426 S_docatch_body(pTHX_ va_list args)
2433 S_docatch(pTHX_ OP *o)
2438 volatile PERL_SI *cursi = PL_curstackinfo;
2442 assert(CATCH_GET == TRUE);
2446 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_docatch_body));
2451 if (PL_restartop && cursi == PL_curstackinfo) {
2452 PL_op = PL_restartop;
2467 Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, char *code, AV** avp)
2468 /* sv Text to convert to OP tree. */
2469 /* startop op_free() this to undo. */
2470 /* code Short string id of the caller. */
2472 dSP; /* Make POPBLOCK work. */
2475 I32 gimme = 0; /* SUSPECT - INITIALZE TO WHAT? NI-S */
2478 OP *oop = PL_op, *rop;
2479 char tmpbuf[TYPE_DIGITS(long) + 12 + 10];
2485 /* switch to eval mode */
2487 if (PL_curcop == &PL_compiling) {
2488 SAVESPTR(PL_compiling.cop_stash);
2489 PL_compiling.cop_stash = PL_curstash;
2491 SAVESPTR(CopFILEGV(&PL_compiling));
2492 SAVEI16(PL_compiling.cop_line);
2493 sprintf(tmpbuf, "_<(%.10s_eval %lu)", code, (unsigned long)++PL_evalseq);
2494 CopFILEGV_set(&PL_compiling, gv_fetchfile(tmpbuf+2));
2495 PL_compiling.cop_line = 1;
2496 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2497 deleting the eval's FILEGV from the stash before gv_check() runs
2498 (i.e. before run-time proper). To work around the coredump that
2499 ensues, we always turn GvMULTI_on for any globals that were
2500 introduced within evals. See force_ident(). GSAR 96-10-12 */
2501 safestr = savepv(tmpbuf);
2502 SAVEDELETE(PL_defstash, safestr, strlen(safestr));
2504 #ifdef OP_IN_REGISTER
2512 PL_op->op_type = OP_ENTEREVAL;
2513 PL_op->op_flags = 0; /* Avoid uninit warning. */
2514 PUSHBLOCK(cx, CXt_EVAL, SP);
2515 PUSHEVAL(cx, 0, Nullgv);
2516 rop = doeval(G_SCALAR, startop);
2517 POPBLOCK(cx,PL_curpm);
2520 (*startop)->op_type = OP_NULL;
2521 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
2523 *avp = (AV*)SvREFCNT_inc(PL_comppad);
2525 if (PL_curcop == &PL_compiling)
2526 PL_compiling.op_private = PL_hints;
2527 #ifdef OP_IN_REGISTER
2533 /* With USE_THREADS, eval_owner must be held on entry to doeval */
2535 S_doeval(pTHX_ int gimme, OP** startop)
2544 PL_in_eval = EVAL_INEVAL;
2548 /* set up a scratch pad */
2551 SAVESPTR(PL_curpad);
2552 SAVESPTR(PL_comppad);
2553 SAVESPTR(PL_comppad_name);
2554 SAVEI32(PL_comppad_name_fill);
2555 SAVEI32(PL_min_intro_pending);
2556 SAVEI32(PL_max_intro_pending);
2559 for (i = cxstack_ix - 1; i >= 0; i--) {
2560 PERL_CONTEXT *cx = &cxstack[i];
2561 if (CxTYPE(cx) == CXt_EVAL)
2563 else if (CxTYPE(cx) == CXt_SUB) {
2564 caller = cx->blk_sub.cv;
2569 SAVESPTR(PL_compcv);
2570 PL_compcv = (CV*)NEWSV(1104,0);
2571 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2572 CvEVAL_on(PL_compcv);
2574 CvOWNER(PL_compcv) = 0;
2575 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
2576 MUTEX_INIT(CvMUTEXP(PL_compcv));
2577 #endif /* USE_THREADS */
2579 PL_comppad = newAV();
2580 av_push(PL_comppad, Nullsv);
2581 PL_curpad = AvARRAY(PL_comppad);
2582 PL_comppad_name = newAV();
2583 PL_comppad_name_fill = 0;
2584 PL_min_intro_pending = 0;
2587 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
2588 PL_curpad[0] = (SV*)newAV();
2589 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
2590 #endif /* USE_THREADS */
2592 comppadlist = newAV();
2593 AvREAL_off(comppadlist);
2594 av_store(comppadlist, 0, (SV*)PL_comppad_name);
2595 av_store(comppadlist, 1, (SV*)PL_comppad);
2596 CvPADLIST(PL_compcv) = comppadlist;
2598 if (!saveop || saveop->op_type != OP_REQUIRE)
2599 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(caller);
2601 SAVEFREESV(PL_compcv);
2603 /* make sure we compile in the right package */
2605 newstash = PL_curcop->cop_stash;
2606 if (PL_curstash != newstash) {
2607 SAVESPTR(PL_curstash);
2608 PL_curstash = newstash;
2610 SAVESPTR(PL_beginav);
2611 PL_beginav = newAV();
2612 SAVEFREESV(PL_beginav);
2614 /* try to compile it */
2616 PL_eval_root = Nullop;
2618 PL_curcop = &PL_compiling;
2619 PL_curcop->cop_arybase = 0;
2620 SvREFCNT_dec(PL_rs);
2621 PL_rs = newSVpvn("\n", 1);
2622 if (saveop && saveop->op_flags & OPf_SPECIAL)
2623 PL_in_eval |= EVAL_KEEPERR;
2626 if (yyparse() || PL_error_count || !PL_eval_root) {
2630 I32 optype = 0; /* Might be reset by POPEVAL. */
2635 op_free(PL_eval_root);
2636 PL_eval_root = Nullop;
2638 SP = PL_stack_base + POPMARK; /* pop original mark */
2640 POPBLOCK(cx,PL_curpm);
2646 if (optype == OP_REQUIRE) {
2647 char* msg = SvPVx(ERRSV, n_a);
2648 DIE(aTHX_ "%sCompilation failed in require",
2649 *msg ? msg : "Unknown error\n");
2652 char* msg = SvPVx(ERRSV, n_a);
2654 POPBLOCK(cx,PL_curpm);
2656 Perl_croak(aTHX_ "%sCompilation failed in regexp",
2657 (*msg ? msg : "Unknown error\n"));
2659 SvREFCNT_dec(PL_rs);
2660 PL_rs = SvREFCNT_inc(PL_nrs);
2662 MUTEX_LOCK(&PL_eval_mutex);
2664 COND_SIGNAL(&PL_eval_cond);
2665 MUTEX_UNLOCK(&PL_eval_mutex);
2666 #endif /* USE_THREADS */
2669 SvREFCNT_dec(PL_rs);
2670 PL_rs = SvREFCNT_inc(PL_nrs);
2671 PL_compiling.cop_line = 0;
2673 *startop = PL_eval_root;
2674 SvREFCNT_dec(CvOUTSIDE(PL_compcv));
2675 CvOUTSIDE(PL_compcv) = Nullcv;
2677 SAVEFREEOP(PL_eval_root);
2679 scalarvoid(PL_eval_root);
2680 else if (gimme & G_ARRAY)
2683 scalar(PL_eval_root);
2685 DEBUG_x(dump_eval());
2687 /* Register with debugger: */
2688 if (PERLDB_INTER && saveop->op_type == OP_REQUIRE) {
2689 CV *cv = get_cv("DB::postponed", FALSE);
2693 XPUSHs((SV*)CopFILEGV(&PL_compiling));
2695 call_sv((SV*)cv, G_DISCARD);
2699 /* compiled okay, so do it */
2701 CvDEPTH(PL_compcv) = 1;
2702 SP = PL_stack_base + POPMARK; /* pop original mark */
2703 PL_op = saveop; /* The caller may need it. */
2705 MUTEX_LOCK(&PL_eval_mutex);
2707 COND_SIGNAL(&PL_eval_cond);
2708 MUTEX_UNLOCK(&PL_eval_mutex);
2709 #endif /* USE_THREADS */
2711 RETURNOP(PL_eval_start);
2715 S_doopen_pmc(pTHX_ const char *name, const char *mode)
2717 STRLEN namelen = strlen(name);
2720 if (namelen > 3 && strEQ(name + namelen - 3, ".pm")) {
2721 SV *pmcsv = Perl_newSVpvf(aTHX_ "%s%c", name, 'c');
2722 char *pmc = SvPV_nolen(pmcsv);
2725 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
2726 fp = PerlIO_open(name, mode);
2729 if (PerlLIO_stat(name, &pmstat) < 0 ||
2730 pmstat.st_mtime < pmcstat.st_mtime)
2732 fp = PerlIO_open(pmc, mode);
2735 fp = PerlIO_open(name, mode);
2738 SvREFCNT_dec(pmcsv);
2741 fp = PerlIO_open(name, mode);
2749 register PERL_CONTEXT *cx;
2754 SV *namesv = Nullsv;
2756 I32 gimme = G_SCALAR;
2757 PerlIO *tryrsfp = 0;
2759 int filter_has_file = 0;
2760 GV *filter_child_proc = 0;
2761 SV *filter_state = 0;
2765 if (SvNIOKp(sv) && !SvPOKp(sv)) {
2766 if (Atof(PL_patchlevel) + 0.00000999 < SvNV(sv))
2767 DIE(aTHX_ "Perl %s required--this is only version %s, stopped",
2768 SvPV(sv,n_a),PL_patchlevel);
2771 name = SvPV(sv, len);
2772 if (!(name && len > 0 && *name))
2773 DIE(aTHX_ "Null filename used");
2774 TAINT_PROPER("require");
2775 if (PL_op->op_type == OP_REQUIRE &&
2776 (svp = hv_fetch(GvHVn(PL_incgv), name, len, 0)) &&
2777 *svp != &PL_sv_undef)
2780 /* prepare to compile file */
2785 (name[1] == '.' && name[2] == '/')))
2787 || (name[0] && name[1] == ':')
2790 || (name[0] == '\\' && name[1] == '\\') /* UNC path */
2793 || (strchr(name,':') || ((*name == '[' || *name == '<') &&
2794 (isALNUM(name[1]) || strchr("$-_]>",name[1]))))
2799 tryrsfp = doopen_pmc(name,PERL_SCRIPT_MODE);
2802 AV *ar = GvAVn(PL_incgv);
2806 if ((unixname = tounixspec(name, Nullch)) != Nullch)
2809 namesv = NEWSV(806, 0);
2810 for (i = 0; i <= AvFILL(ar); i++) {
2811 SV *dirsv = *av_fetch(ar, i, TRUE);
2817 if (SvTYPE(SvRV(loader)) == SVt_PVAV) {
2818 loader = *av_fetch((AV *)SvRV(loader), 0, TRUE);
2821 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
2822 PTR2UV(SvANY(loader)), name);
2823 tryname = SvPVX(namesv);
2834 count = call_sv(loader, G_ARRAY);
2844 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVGV) {
2848 if (SvTYPE(arg) == SVt_PVGV) {
2849 IO *io = GvIO((GV *)arg);
2854 tryrsfp = IoIFP(io);
2855 if (IoTYPE(io) == '|') {
2856 /* reading from a child process doesn't
2857 nest -- when returning from reading
2858 the inner module, the outer one is
2859 unreadable (closed?) I've tried to
2860 save the gv to manage the lifespan of
2861 the pipe, but this didn't help. XXX */
2862 filter_child_proc = (GV *)arg;
2863 (void)SvREFCNT_inc(filter_child_proc);
2866 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
2867 PerlIO_close(IoOFP(io));
2879 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
2881 (void)SvREFCNT_inc(filter_sub);
2884 filter_state = SP[i];
2885 (void)SvREFCNT_inc(filter_state);
2889 tryrsfp = PerlIO_open("/dev/null",
2903 filter_has_file = 0;
2904 if (filter_child_proc) {
2905 SvREFCNT_dec(filter_child_proc);
2906 filter_child_proc = 0;
2909 SvREFCNT_dec(filter_state);
2913 SvREFCNT_dec(filter_sub);
2918 char *dir = SvPVx(dirsv, n_a);
2921 if ((unixdir = tounixpath(dir, Nullch)) == Nullch)
2923 sv_setpv(namesv, unixdir);
2924 sv_catpv(namesv, unixname);
2926 Perl_sv_setpvf(aTHX_ namesv, "%s/%s", dir, name);
2928 TAINT_PROPER("require");
2929 tryname = SvPVX(namesv);
2930 tryrsfp = doopen_pmc(tryname, PERL_SCRIPT_MODE);
2932 if (tryname[0] == '.' && tryname[1] == '/')
2940 SAVESPTR(CopFILEGV(&PL_compiling));
2941 CopFILEGV_set(&PL_compiling, gv_fetchfile(tryrsfp ? tryname : name));
2942 SvREFCNT_dec(namesv);
2944 if (PL_op->op_type == OP_REQUIRE) {
2945 char *msgstr = name;
2946 if (namesv) { /* did we lookup @INC? */
2947 SV *msg = sv_2mortal(newSVpv(msgstr,0));
2948 SV *dirmsgsv = NEWSV(0, 0);
2949 AV *ar = GvAVn(PL_incgv);
2951 sv_catpvn(msg, " in @INC", 8);
2952 if (instr(SvPVX(msg), ".h "))
2953 sv_catpv(msg, " (change .h to .ph maybe?)");
2954 if (instr(SvPVX(msg), ".ph "))
2955 sv_catpv(msg, " (did you run h2ph?)");
2956 sv_catpv(msg, " (@INC contains:");
2957 for (i = 0; i <= AvFILL(ar); i++) {
2958 char *dir = SvPVx(*av_fetch(ar, i, TRUE), n_a);
2959 Perl_sv_setpvf(aTHX_ dirmsgsv, " %s", dir);
2960 sv_catsv(msg, dirmsgsv);
2962 sv_catpvn(msg, ")", 1);
2963 SvREFCNT_dec(dirmsgsv);
2964 msgstr = SvPV_nolen(msg);
2966 DIE(aTHX_ "Can't locate %s", msgstr);
2972 SETERRNO(0, SS$_NORMAL);
2974 /* Assume success here to prevent recursive requirement. */
2975 (void)hv_store(GvHVn(PL_incgv), name, strlen(name),
2976 newSVsv(CopFILESV(&PL_compiling)), 0 );
2980 lex_start(sv_2mortal(newSVpvn("",0)));
2981 SAVEGENERICSV(PL_rsfp_filters);
2982 PL_rsfp_filters = Nullav;
2985 name = savepv(name);
2989 SAVEPPTR(PL_compiling.cop_warnings);
2990 if (PL_dowarn & G_WARN_ALL_ON)
2991 PL_compiling.cop_warnings = WARN_ALL ;
2992 else if (PL_dowarn & G_WARN_ALL_OFF)
2993 PL_compiling.cop_warnings = WARN_NONE ;
2995 PL_compiling.cop_warnings = WARN_STD ;
2997 if (filter_sub || filter_child_proc) {
2998 SV *datasv = filter_add(run_user_filter, Nullsv);
2999 IoLINES(datasv) = filter_has_file;
3000 IoFMT_GV(datasv) = (GV *)filter_child_proc;
3001 IoTOP_GV(datasv) = (GV *)filter_state;
3002 IoBOTTOM_GV(datasv) = (GV *)filter_sub;
3005 /* switch to eval mode */
3006 push_return(PL_op->op_next);
3007 PUSHBLOCK(cx, CXt_EVAL, SP);
3008 PUSHEVAL(cx, name, Nullgv);
3010 SAVEI16(PL_compiling.cop_line);
3011 PL_compiling.cop_line = 0;
3015 MUTEX_LOCK(&PL_eval_mutex);
3016 if (PL_eval_owner && PL_eval_owner != thr)
3017 while (PL_eval_owner)
3018 COND_WAIT(&PL_eval_cond, &PL_eval_mutex);
3019 PL_eval_owner = thr;
3020 MUTEX_UNLOCK(&PL_eval_mutex);
3021 #endif /* USE_THREADS */
3022 return DOCATCH(doeval(G_SCALAR, NULL));
3027 return pp_require();
3033 register PERL_CONTEXT *cx;
3035 I32 gimme = GIMME_V, was = PL_sub_generation;
3036 char tmpbuf[TYPE_DIGITS(long) + 12];
3041 if (!SvPV(sv,len) || !len)
3043 TAINT_PROPER("eval");
3049 /* switch to eval mode */
3051 SAVESPTR(CopFILEGV(&PL_compiling));
3052 sprintf(tmpbuf, "_<(eval %lu)", (unsigned long)++PL_evalseq);
3053 CopFILEGV_set(&PL_compiling, gv_fetchfile(tmpbuf+2));
3054 PL_compiling.cop_line = 1;
3055 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
3056 deleting the eval's FILEGV from the stash before gv_check() runs
3057 (i.e. before run-time proper). To work around the coredump that
3058 ensues, we always turn GvMULTI_on for any globals that were
3059 introduced within evals. See force_ident(). GSAR 96-10-12 */
3060 safestr = savepv(tmpbuf);
3061 SAVEDELETE(PL_defstash, safestr, strlen(safestr));
3063 PL_hints = PL_op->op_targ;
3064 SAVEPPTR(PL_compiling.cop_warnings);
3065 if (!specialWARN(PL_compiling.cop_warnings)) {
3066 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
3067 SAVEFREESV(PL_compiling.cop_warnings) ;
3070 push_return(PL_op->op_next);
3071 PUSHBLOCK(cx, (CXt_EVAL|CXp_REAL), SP);
3072 PUSHEVAL(cx, 0, Nullgv);
3074 /* prepare to compile string */
3076 if (PERLDB_LINE && PL_curstash != PL_debstash)
3077 save_lines(CopFILEAV(&PL_compiling), PL_linestr);
3080 MUTEX_LOCK(&PL_eval_mutex);
3081 if (PL_eval_owner && PL_eval_owner != thr)
3082 while (PL_eval_owner)
3083 COND_WAIT(&PL_eval_cond, &PL_eval_mutex);
3084 PL_eval_owner = thr;
3085 MUTEX_UNLOCK(&PL_eval_mutex);
3086 #endif /* USE_THREADS */
3087 ret = doeval(gimme, NULL);
3088 if (PERLDB_INTER && was != PL_sub_generation /* Some subs defined here. */
3089 && ret != PL_op->op_next) { /* Successive compilation. */
3090 strcpy(safestr, "_<(eval )"); /* Anything fake and short. */
3092 return DOCATCH(ret);
3102 register PERL_CONTEXT *cx;
3104 U8 save_flags = PL_op -> op_flags;
3109 retop = pop_return();
3112 if (gimme == G_VOID)
3114 else if (gimme == G_SCALAR) {
3117 if (SvFLAGS(TOPs) & SVs_TEMP)
3120 *MARK = sv_mortalcopy(TOPs);
3124 *MARK = &PL_sv_undef;
3129 /* in case LEAVE wipes old return values */
3130 for (mark = newsp + 1; mark <= SP; mark++) {
3131 if (!(SvFLAGS(*mark) & SVs_TEMP)) {
3132 *mark = sv_mortalcopy(*mark);
3133 TAINT_NOT; /* Each item is independent */
3137 PL_curpm = newpm; /* Don't pop $1 et al till now */
3139 if (AvFILLp(PL_comppad_name) >= 0)
3143 assert(CvDEPTH(PL_compcv) == 1);
3145 CvDEPTH(PL_compcv) = 0;
3148 if (optype == OP_REQUIRE &&
3149 !(gimme == G_SCALAR ? SvTRUE(*SP) : SP > newsp))
3151 /* Unassume the success we assumed earlier. */
3152 char *name = cx->blk_eval.old_name;
3153 (void)hv_delete(GvHVn(PL_incgv), name, strlen(name), G_DISCARD);
3154 retop = Perl_die(aTHX_ "%s did not return a true value", name);
3155 /* die_where() did LEAVE, or we won't be here */
3159 if (!(save_flags & OPf_SPECIAL))
3169 register PERL_CONTEXT *cx;
3170 I32 gimme = GIMME_V;
3175 push_return(cLOGOP->op_other->op_next);
3176 PUSHBLOCK(cx, CXt_EVAL, SP);
3178 PL_eval_root = PL_op; /* Only needed so that goto works right. */
3180 PL_in_eval = EVAL_INEVAL;
3183 return DOCATCH(PL_op->op_next);
3193 register PERL_CONTEXT *cx;
3201 if (gimme == G_VOID)
3203 else if (gimme == G_SCALAR) {
3206 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
3209 *MARK = sv_mortalcopy(TOPs);
3213 *MARK = &PL_sv_undef;
3218 /* in case LEAVE wipes old return values */
3219 for (mark = newsp + 1; mark <= SP; mark++) {
3220 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
3221 *mark = sv_mortalcopy(*mark);
3222 TAINT_NOT; /* Each item is independent */
3226 PL_curpm = newpm; /* Don't pop $1 et al till now */
3234 S_doparseform(pTHX_ SV *sv)
3237 register char *s = SvPV_force(sv, len);
3238 register char *send = s + len;
3239 register char *base;
3240 register I32 skipspaces = 0;
3243 bool postspace = FALSE;
3251 Perl_croak(aTHX_ "Null picture in formline");
3253 New(804, fops, (send - s)*3+10, U16); /* Almost certainly too long... */
3258 *fpc++ = FF_LINEMARK;
3259 noblank = repeat = FALSE;
3277 case ' ': case '\t':
3288 *fpc++ = FF_LITERAL;
3296 *fpc++ = skipspaces;
3300 *fpc++ = FF_NEWLINE;
3304 arg = fpc - linepc + 1;
3311 *fpc++ = FF_LINEMARK;
3312 noblank = repeat = FALSE;
3321 ischop = s[-1] == '^';
3327 arg = (s - base) - 1;
3329 *fpc++ = FF_LITERAL;
3338 *fpc++ = FF_LINEGLOB;
3340 else if (*s == '#' || (*s == '.' && s[1] == '#')) {
3341 arg = ischop ? 512 : 0;
3351 arg |= 256 + (s - f);
3353 *fpc++ = s - base; /* fieldsize for FETCH */
3354 *fpc++ = FF_DECIMAL;
3359 bool ismore = FALSE;
3362 while (*++s == '>') ;
3363 prespace = FF_SPACE;
3365 else if (*s == '|') {
3366 while (*++s == '|') ;
3367 prespace = FF_HALFSPACE;
3372 while (*++s == '<') ;
3375 if (*s == '.' && s[1] == '.' && s[2] == '.') {
3379 *fpc++ = s - base; /* fieldsize for FETCH */
3381 *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL;
3399 { /* need to jump to the next word */
3401 z = WORD_ALIGN - SvCUR(sv) % WORD_ALIGN;
3402 SvGROW(sv, SvCUR(sv) + z + arg * sizeof(U16) + 4);
3403 s = SvPVX(sv) + SvCUR(sv) + z;
3405 Copy(fops, s, arg, U16);
3407 sv_magic(sv, Nullsv, 'f', Nullch, 0);
3412 * The rest of this file was derived from source code contributed
3415 * NOTE: this code was derived from Tom Horsley's qsort replacement
3416 * and should not be confused with the original code.
3419 /* Copyright (C) Tom Horsley, 1997. All rights reserved.
3421 Permission granted to distribute under the same terms as perl which are
3424 This program is free software; you can redistribute it and/or modify
3425 it under the terms of either:
3427 a) the GNU General Public License as published by the Free
3428 Software Foundation; either version 1, or (at your option) any
3431 b) the "Artistic License" which comes with this Kit.
3433 Details on the perl license can be found in the perl source code which
3434 may be located via the www.perl.com web page.
3436 This is the most wonderfulest possible qsort I can come up with (and
3437 still be mostly portable) My (limited) tests indicate it consistently
3438 does about 20% fewer calls to compare than does the qsort in the Visual
3439 C++ library, other vendors may vary.
3441 Some of the ideas in here can be found in "Algorithms" by Sedgewick,
3442 others I invented myself (or more likely re-invented since they seemed
3443 pretty obvious once I watched the algorithm operate for a while).
3445 Most of this code was written while watching the Marlins sweep the Giants
3446 in the 1997 National League Playoffs - no Braves fans allowed to use this
3447 code (just kidding :-).
3449 I realize that if I wanted to be true to the perl tradition, the only
3450 comment in this file would be something like:
3452 ...they shuffled back towards the rear of the line. 'No, not at the
3453 rear!' the slave-driver shouted. 'Three files up. And stay there...
3455 However, I really needed to violate that tradition just so I could keep
3456 track of what happens myself, not to mention some poor fool trying to
3457 understand this years from now :-).
3460 /* ********************************************************** Configuration */
3462 #ifndef QSORT_ORDER_GUESS
3463 #define QSORT_ORDER_GUESS 2 /* Select doubling version of the netBSD trick */
3466 /* QSORT_MAX_STACK is the largest number of partitions that can be stacked up for
3467 future processing - a good max upper bound is log base 2 of memory size
3468 (32 on 32 bit machines, 64 on 64 bit machines, etc). In reality can
3469 safely be smaller than that since the program is taking up some space and
3470 most operating systems only let you grab some subset of contiguous
3471 memory (not to mention that you are normally sorting data larger than
3472 1 byte element size :-).
3474 #ifndef QSORT_MAX_STACK
3475 #define QSORT_MAX_STACK 32
3478 /* QSORT_BREAK_EVEN is the size of the largest partition we should insertion sort.
3479 Anything bigger and we use qsort. If you make this too small, the qsort
3480 will probably break (or become less efficient), because it doesn't expect
3481 the middle element of a partition to be the same as the right or left -
3482 you have been warned).
3484 #ifndef QSORT_BREAK_EVEN
3485 #define QSORT_BREAK_EVEN 6
3488 /* ************************************************************* Data Types */
3490 /* hold left and right index values of a partition waiting to be sorted (the
3491 partition includes both left and right - right is NOT one past the end or
3492 anything like that).
3494 struct partition_stack_entry {
3497 #ifdef QSORT_ORDER_GUESS
3498 int qsort_break_even;
3502 /* ******************************************************* Shorthand Macros */
3504 /* Note that these macros will be used from inside the qsort function where
3505 we happen to know that the variable 'elt_size' contains the size of an
3506 array element and the variable 'temp' points to enough space to hold a
3507 temp element and the variable 'array' points to the array being sorted
3508 and 'compare' is the pointer to the compare routine.
3510 Also note that there are very many highly architecture specific ways
3511 these might be sped up, but this is simply the most generally portable
3512 code I could think of.
3515 /* Return < 0 == 0 or > 0 as the value of elt1 is < elt2, == elt2, > elt2
3517 #define qsort_cmp(elt1, elt2) \
3518 ((*compare)(aTHXo_ array[elt1], array[elt2]))
3520 #ifdef QSORT_ORDER_GUESS
3521 #define QSORT_NOTICE_SWAP swapped++;
3523 #define QSORT_NOTICE_SWAP
3526 /* swaps contents of array elements elt1, elt2.
3528 #define qsort_swap(elt1, elt2) \
3531 temp = array[elt1]; \
3532 array[elt1] = array[elt2]; \
3533 array[elt2] = temp; \
3536 /* rotate contents of elt1, elt2, elt3 such that elt1 gets elt2, elt2 gets
3537 elt3 and elt3 gets elt1.
3539 #define qsort_rotate(elt1, elt2, elt3) \
3542 temp = array[elt1]; \
3543 array[elt1] = array[elt2]; \
3544 array[elt2] = array[elt3]; \
3545 array[elt3] = temp; \
3548 /* ************************************************************ Debug stuff */
3555 return; /* good place to set a breakpoint */
3558 #define qsort_assert(t) (void)( (t) || (break_here(), 0) )
3561 doqsort_all_asserts(
3565 int (*compare)(const void * elt1, const void * elt2),
3566 int pc_left, int pc_right, int u_left, int u_right)
3570 qsort_assert(pc_left <= pc_right);
3571 qsort_assert(u_right < pc_left);
3572 qsort_assert(pc_right < u_left);
3573 for (i = u_right + 1; i < pc_left; ++i) {
3574 qsort_assert(qsort_cmp(i, pc_left) < 0);
3576 for (i = pc_left; i < pc_right; ++i) {
3577 qsort_assert(qsort_cmp(i, pc_right) == 0);
3579 for (i = pc_right + 1; i < u_left; ++i) {
3580 qsort_assert(qsort_cmp(pc_right, i) < 0);
3584 #define qsort_all_asserts(PC_LEFT, PC_RIGHT, U_LEFT, U_RIGHT) \
3585 doqsort_all_asserts(array, num_elts, elt_size, compare, \
3586 PC_LEFT, PC_RIGHT, U_LEFT, U_RIGHT)
3590 #define qsort_assert(t) ((void)0)
3592 #define qsort_all_asserts(PC_LEFT, PC_RIGHT, U_LEFT, U_RIGHT) ((void)0)
3596 /* ****************************************************************** qsort */
3599 S_qsortsv(pTHX_ SV ** array, size_t num_elts, SVCOMPARE_t compare)
3603 struct partition_stack_entry partition_stack[QSORT_MAX_STACK];
3604 int next_stack_entry = 0;
3608 #ifdef QSORT_ORDER_GUESS
3609 int qsort_break_even;
3613 /* Make sure we actually have work to do.
3615 if (num_elts <= 1) {
3619 /* Setup the initial partition definition and fall into the sorting loop
3622 part_right = (int)(num_elts - 1);
3623 #ifdef QSORT_ORDER_GUESS
3624 qsort_break_even = QSORT_BREAK_EVEN;
3626 #define qsort_break_even QSORT_BREAK_EVEN
3629 if ((part_right - part_left) >= qsort_break_even) {
3630 /* OK, this is gonna get hairy, so lets try to document all the
3631 concepts and abbreviations and variables and what they keep
3634 pc: pivot chunk - the set of array elements we accumulate in the
3635 middle of the partition, all equal in value to the original
3636 pivot element selected. The pc is defined by:
3638 pc_left - the leftmost array index of the pc
3639 pc_right - the rightmost array index of the pc
3641 we start with pc_left == pc_right and only one element
3642 in the pivot chunk (but it can grow during the scan).
3644 u: uncompared elements - the set of elements in the partition
3645 we have not yet compared to the pivot value. There are two
3646 uncompared sets during the scan - one to the left of the pc
3647 and one to the right.
3649 u_right - the rightmost index of the left side's uncompared set
3650 u_left - the leftmost index of the right side's uncompared set
3652 The leftmost index of the left sides's uncompared set
3653 doesn't need its own variable because it is always defined
3654 by the leftmost edge of the whole partition (part_left). The
3655 same goes for the rightmost edge of the right partition
3658 We know there are no uncompared elements on the left once we
3659 get u_right < part_left and no uncompared elements on the
3660 right once u_left > part_right. When both these conditions
3661 are met, we have completed the scan of the partition.
3663 Any elements which are between the pivot chunk and the
3664 uncompared elements should be less than the pivot value on
3665 the left side and greater than the pivot value on the right
3666 side (in fact, the goal of the whole algorithm is to arrange
3667 for that to be true and make the groups of less-than and
3668 greater-then elements into new partitions to sort again).
3670 As you marvel at the complexity of the code and wonder why it
3671 has to be so confusing. Consider some of the things this level
3672 of confusion brings:
3674 Once I do a compare, I squeeze every ounce of juice out of it. I
3675 never do compare calls I don't have to do, and I certainly never
3678 I also never swap any elements unless I can prove there is a
3679 good reason. Many sort algorithms will swap a known value with
3680 an uncompared value just to get things in the right place (or
3681 avoid complexity :-), but that uncompared value, once it gets
3682 compared, may then have to be swapped again. A lot of the
3683 complexity of this code is due to the fact that it never swaps
3684 anything except compared values, and it only swaps them when the
3685 compare shows they are out of position.
3687 int pc_left, pc_right;
3688 int u_right, u_left;
3692 pc_left = ((part_left + part_right) / 2);
3694 u_right = pc_left - 1;
3695 u_left = pc_right + 1;
3697 /* Qsort works best when the pivot value is also the median value
3698 in the partition (unfortunately you can't find the median value
3699 without first sorting :-), so to give the algorithm a helping
3700 hand, we pick 3 elements and sort them and use the median value
3701 of that tiny set as the pivot value.
3703 Some versions of qsort like to use the left middle and right as
3704 the 3 elements to sort so they can insure the ends of the
3705 partition will contain values which will stop the scan in the
3706 compare loop, but when you have to call an arbitrarily complex
3707 routine to do a compare, its really better to just keep track of
3708 array index values to know when you hit the edge of the
3709 partition and avoid the extra compare. An even better reason to
3710 avoid using a compare call is the fact that you can drop off the
3711 edge of the array if someone foolishly provides you with an
3712 unstable compare function that doesn't always provide consistent
3715 So, since it is simpler for us to compare the three adjacent
3716 elements in the middle of the partition, those are the ones we
3717 pick here (conveniently pointed at by u_right, pc_left, and
3718 u_left). The values of the left, center, and right elements
3719 are refered to as l c and r in the following comments.
3722 #ifdef QSORT_ORDER_GUESS
3725 s = qsort_cmp(u_right, pc_left);
3728 s = qsort_cmp(pc_left, u_left);
3729 /* if l < c, c < r - already in order - nothing to do */
3731 /* l < c, c == r - already in order, pc grows */
3733 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3735 /* l < c, c > r - need to know more */
3736 s = qsort_cmp(u_right, u_left);
3738 /* l < c, c > r, l < r - swap c & r to get ordered */
3739 qsort_swap(pc_left, u_left);
3740 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3741 } else if (s == 0) {
3742 /* l < c, c > r, l == r - swap c&r, grow pc */
3743 qsort_swap(pc_left, u_left);
3745 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3747 /* l < c, c > r, l > r - make lcr into rlc to get ordered */
3748 qsort_rotate(pc_left, u_right, u_left);
3749 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3752 } else if (s == 0) {
3754 s = qsort_cmp(pc_left, u_left);
3756 /* l == c, c < r - already in order, grow pc */
3758 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3759 } else if (s == 0) {
3760 /* l == c, c == r - already in order, grow pc both ways */
3763 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3765 /* l == c, c > r - swap l & r, grow pc */
3766 qsort_swap(u_right, u_left);
3768 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3772 s = qsort_cmp(pc_left, u_left);
3774 /* l > c, c < r - need to know more */
3775 s = qsort_cmp(u_right, u_left);
3777 /* l > c, c < r, l < r - swap l & c to get ordered */
3778 qsort_swap(u_right, pc_left);
3779 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3780 } else if (s == 0) {
3781 /* l > c, c < r, l == r - swap l & c, grow pc */
3782 qsort_swap(u_right, pc_left);
3784 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3786 /* l > c, c < r, l > r - rotate lcr into crl to order */
3787 qsort_rotate(u_right, pc_left, u_left);
3788 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3790 } else if (s == 0) {
3791 /* l > c, c == r - swap ends, grow pc */
3792 qsort_swap(u_right, u_left);
3794 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3796 /* l > c, c > r - swap ends to get in order */
3797 qsort_swap(u_right, u_left);
3798 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3801 /* We now know the 3 middle elements have been compared and
3802 arranged in the desired order, so we can shrink the uncompared
3807 qsort_all_asserts(pc_left, pc_right, u_left, u_right);
3809 /* The above massive nested if was the simple part :-). We now have
3810 the middle 3 elements ordered and we need to scan through the
3811 uncompared sets on either side, swapping elements that are on
3812 the wrong side or simply shuffling equal elements around to get
3813 all equal elements into the pivot chunk.
3817 int still_work_on_left;
3818 int still_work_on_right;
3820 /* Scan the uncompared values on the left. If I find a value
3821 equal to the pivot value, move it over so it is adjacent to
3822 the pivot chunk and expand the pivot chunk. If I find a value
3823 less than the pivot value, then just leave it - its already
3824 on the correct side of the partition. If I find a greater
3825 value, then stop the scan.
3827 while (still_work_on_left = (u_right >= part_left)) {
3828 s = qsort_cmp(u_right, pc_left);
3831 } else if (s == 0) {
3833 if (pc_left != u_right) {
3834 qsort_swap(u_right, pc_left);
3840 qsort_assert(u_right < pc_left);
3841 qsort_assert(pc_left <= pc_right);
3842 qsort_assert(qsort_cmp(u_right + 1, pc_left) <= 0);
3843 qsort_assert(qsort_cmp(pc_left, pc_right) == 0);
3846 /* Do a mirror image scan of uncompared values on the right
3848 while (still_work_on_right = (u_left <= part_right)) {
3849 s = qsort_cmp(pc_right, u_left);
3852 } else if (s == 0) {
3854 if (pc_right != u_left) {
3855 qsort_swap(pc_right, u_left);
3861 qsort_assert(u_left > pc_right);
3862 qsort_assert(pc_left <= pc_right);
3863 qsort_assert(qsort_cmp(pc_right, u_left - 1) <= 0);
3864 qsort_assert(qsort_cmp(pc_left, pc_right) == 0);
3867 if (still_work_on_left) {
3868 /* I know I have a value on the left side which needs to be
3869 on the right side, but I need to know more to decide
3870 exactly the best thing to do with it.
3872 if (still_work_on_right) {
3873 /* I know I have values on both side which are out of
3874 position. This is a big win because I kill two birds
3875 with one swap (so to speak). I can advance the
3876 uncompared pointers on both sides after swapping both
3877 of them into the right place.
3879 qsort_swap(u_right, u_left);
3882 qsort_all_asserts(pc_left, pc_right, u_left, u_right);
3884 /* I have an out of position value on the left, but the
3885 right is fully scanned, so I "slide" the pivot chunk
3886 and any less-than values left one to make room for the
3887 greater value over on the right. If the out of position
3888 value is immediately adjacent to the pivot chunk (there
3889 are no less-than values), I can do that with a swap,
3890 otherwise, I have to rotate one of the less than values
3891 into the former position of the out of position value
3892 and the right end of the pivot chunk into the left end
3896 if (pc_left == u_right) {
3897 qsort_swap(u_right, pc_right);
3898 qsort_all_asserts(pc_left, pc_right-1, u_left, u_right-1);
3900 qsort_rotate(u_right, pc_left, pc_right);
3901 qsort_all_asserts(pc_left, pc_right-1, u_left, u_right-1);
3906 } else if (still_work_on_right) {
3907 /* Mirror image of complex case above: I have an out of
3908 position value on the right, but the left is fully
3909 scanned, so I need to shuffle things around to make room
3910 for the right value on the left.
3913 if (pc_right == u_left) {
3914 qsort_swap(u_left, pc_left);
3915 qsort_all_asserts(pc_left+1, pc_right, u_left+1, u_right);
3917 qsort_rotate(pc_right, pc_left, u_left);
3918 qsort_all_asserts(pc_left+1, pc_right, u_left+1, u_right);
3923 /* No more scanning required on either side of partition,
3924 break out of loop and figure out next set of partitions
3930 /* The elements in the pivot chunk are now in the right place. They
3931 will never move or be compared again. All I have to do is decide
3932 what to do with the stuff to the left and right of the pivot
3935 Notes on the QSORT_ORDER_GUESS ifdef code:
3937 1. If I just built these partitions without swapping any (or
3938 very many) elements, there is a chance that the elements are
3939 already ordered properly (being properly ordered will
3940 certainly result in no swapping, but the converse can't be
3943 2. A (properly written) insertion sort will run faster on
3944 already ordered data than qsort will.
3946 3. Perhaps there is some way to make a good guess about
3947 switching to an insertion sort earlier than partition size 6
3948 (for instance - we could save the partition size on the stack
3949 and increase the size each time we find we didn't swap, thus
3950 switching to insertion sort earlier for partitions with a
3951 history of not swapping).
3953 4. Naturally, if I just switch right away, it will make
3954 artificial benchmarks with pure ascending (or descending)
3955 data look really good, but is that a good reason in general?
3959 #ifdef QSORT_ORDER_GUESS
3961 #if QSORT_ORDER_GUESS == 1
3962 qsort_break_even = (part_right - part_left) + 1;
3964 #if QSORT_ORDER_GUESS == 2
3965 qsort_break_even *= 2;
3967 #if QSORT_ORDER_GUESS == 3
3968 int prev_break = qsort_break_even;
3969 qsort_break_even *= qsort_break_even;
3970 if (qsort_break_even < prev_break) {
3971 qsort_break_even = (part_right - part_left) + 1;
3975 qsort_break_even = QSORT_BREAK_EVEN;
3979 if (part_left < pc_left) {
3980 /* There are elements on the left which need more processing.
3981 Check the right as well before deciding what to do.
3983 if (pc_right < part_right) {
3984 /* We have two partitions to be sorted. Stack the biggest one
3985 and process the smallest one on the next iteration. This
3986 minimizes the stack height by insuring that any additional
3987 stack entries must come from the smallest partition which
3988 (because it is smallest) will have the fewest
3989 opportunities to generate additional stack entries.
3991 if ((part_right - pc_right) > (pc_left - part_left)) {
3992 /* stack the right partition, process the left */
3993 partition_stack[next_stack_entry].left = pc_right + 1;
3994 partition_stack[next_stack_entry].right = part_right;
3995 #ifdef QSORT_ORDER_GUESS
3996 partition_stack[next_stack_entry].qsort_break_even = qsort_break_even;
3998 part_right = pc_left - 1;
4000 /* stack the left partition, process the right */
4001 partition_stack[next_stack_entry].left = part_left;
4002 partition_stack[next_stack_entry].right = pc_left - 1;
4003 #ifdef QSORT_ORDER_GUESS
4004 partition_stack[next_stack_entry].qsort_break_even = qsort_break_even;
4006 part_left = pc_right + 1;
4008 qsort_assert(next_stack_entry < QSORT_MAX_STACK);
4011 /* The elements on the left are the only remaining elements
4012 that need sorting, arrange for them to be processed as the
4015 part_right = pc_left - 1;
4017 } else if (pc_right < part_right) {
4018 /* There is only one chunk on the right to be sorted, make it
4019 the new partition and loop back around.
4021 part_left = pc_right + 1;
4023 /* This whole partition wound up in the pivot chunk, so
4024 we need to get a new partition off the stack.
4026 if (next_stack_entry == 0) {
4027 /* the stack is empty - we are done */
4031 part_left = partition_stack[next_stack_entry].left;
4032 part_right = partition_stack[next_stack_entry].right;
4033 #ifdef QSORT_ORDER_GUESS
4034 qsort_break_even = partition_stack[next_stack_entry].qsort_break_even;
4038 /* This partition is too small to fool with qsort complexity, just
4039 do an ordinary insertion sort to minimize overhead.
4042 /* Assume 1st element is in right place already, and start checking
4043 at 2nd element to see where it should be inserted.
4045 for (i = part_left + 1; i <= part_right; ++i) {
4047 /* Scan (backwards - just in case 'i' is already in right place)
4048 through the elements already sorted to see if the ith element
4049 belongs ahead of one of them.
4051 for (j = i - 1; j >= part_left; --j) {
4052 if (qsort_cmp(i, j) >= 0) {
4053 /* i belongs right after j
4060 /* Looks like we really need to move some things
4064 for (k = i - 1; k >= j; --k)
4065 array[k + 1] = array[k];
4070 /* That partition is now sorted, grab the next one, or get out
4071 of the loop if there aren't any more.
4074 if (next_stack_entry == 0) {
4075 /* the stack is empty - we are done */
4079 part_left = partition_stack[next_stack_entry].left;
4080 part_right = partition_stack[next_stack_entry].right;
4081 #ifdef QSORT_ORDER_GUESS
4082 qsort_break_even = partition_stack[next_stack_entry].qsort_break_even;
4087 /* Believe it or not, the array is sorted at this point! */
4099 sortcv(pTHXo_ SV *a, SV *b)
4102 I32 oldsaveix = PL_savestack_ix;
4103 I32 oldscopeix = PL_scopestack_ix;
4105 GvSV(PL_firstgv) = a;
4106 GvSV(PL_secondgv) = b;
4107 PL_stack_sp = PL_stack_base;
4110 if (PL_stack_sp != PL_stack_base + 1)
4111 Perl_croak(aTHX_ "Sort subroutine didn't return single value");
4112 if (!SvNIOKp(*PL_stack_sp))
4113 Perl_croak(aTHX_ "Sort subroutine didn't return a numeric value");
4114 result = SvIV(*PL_stack_sp);
4115 while (PL_scopestack_ix > oldscopeix) {
4118 leave_scope(oldsaveix);
4124 sv_ncmp(pTHXo_ SV *a, SV *b)
4128 return nv1 < nv2 ? -1 : nv1 > nv2 ? 1 : 0;
4132 sv_i_ncmp(pTHXo_ SV *a, SV *b)
4136 return iv1 < iv2 ? -1 : iv1 > iv2 ? 1 : 0;
4138 #define tryCALL_AMAGICbin(left,right,meth,svp) STMT_START { \
4140 if (PL_amagic_generation) { \
4141 if (SvAMAGIC(left)||SvAMAGIC(right))\
4142 *svp = amagic_call(left, \
4150 amagic_ncmp(pTHXo_ register SV *a, register SV *b)
4153 tryCALL_AMAGICbin(a,b,ncmp,&tmpsv);
4158 I32 i = SvIVX(tmpsv);
4168 return sv_ncmp(aTHXo_ a, b);
4172 amagic_i_ncmp(pTHXo_ register SV *a, register SV *b)
4175 tryCALL_AMAGICbin(a,b,ncmp,&tmpsv);
4180 I32 i = SvIVX(tmpsv);
4190 return sv_i_ncmp(aTHXo_ a, b);
4194 amagic_cmp(pTHXo_ register SV *str1, register SV *str2)
4197 tryCALL_AMAGICbin(str1,str2,scmp,&tmpsv);
4202 I32 i = SvIVX(tmpsv);
4212 return sv_cmp(str1, str2);
4216 amagic_cmp_locale(pTHXo_ register SV *str1, register SV *str2)
4219 tryCALL_AMAGICbin(str1,str2,scmp,&tmpsv);
4224 I32 i = SvIVX(tmpsv);
4234 return sv_cmp_locale(str1, str2);
4238 run_user_filter(pTHXo_ int idx, SV *buf_sv, int maxlen)
4240 SV *datasv = FILTER_DATA(idx);
4241 int filter_has_file = IoLINES(datasv);
4242 GV *filter_child_proc = (GV *)IoFMT_GV(datasv);
4243 SV *filter_state = (SV *)IoTOP_GV(datasv);
4244 SV *filter_sub = (SV *)IoBOTTOM_GV(datasv);
4247 /* I was having segfault trouble under Linux 2.2.5 after a
4248 parse error occured. (Had to hack around it with a test
4249 for PL_error_count == 0.) Solaris doesn't segfault --
4250 not sure where the trouble is yet. XXX */
4252 if (filter_has_file) {
4253 len = FILTER_READ(idx+1, buf_sv, maxlen);
4256 if (filter_sub && len >= 0) {
4267 PUSHs(sv_2mortal(newSViv(maxlen)));
4269 PUSHs(filter_state);
4272 count = call_sv(filter_sub, G_SCALAR);
4288 IoLINES(datasv) = 0;
4289 if (filter_child_proc) {
4290 SvREFCNT_dec(filter_child_proc);
4291 IoFMT_GV(datasv) = Nullgv;
4294 SvREFCNT_dec(filter_state);
4295 IoTOP_GV(datasv) = Nullgv;
4298 SvREFCNT_dec(filter_sub);
4299 IoBOTTOM_GV(datasv) = Nullgv;
4301 filter_del(run_user_filter);
4310 sv_cmp_locale_static(pTHXo_ register SV *str1, register SV *str2)
4312 return sv_cmp_locale(str1, str2);
4316 sv_cmp_static(pTHXo_ register SV *str1, register SV *str2)
4318 return sv_cmp(str1, str2);
4321 #endif /* PERL_OBJECT */