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(newSVpvn(SvPVX(GvSV(cx->blk_oldcop->cop_filegv)),
1449 SvCUR(GvSV(cx->blk_oldcop->cop_filegv)))));
1450 PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->cop_line)));
1453 if (CxTYPE(cx) == CXt_SUB) { /* So is ccstack[dbcxix]. */
1455 gv_efullname3(sv, CvGV(ccstack[cxix].blk_sub.cv), Nullch);
1456 PUSHs(sv_2mortal(sv));
1457 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
1460 PUSHs(sv_2mortal(newSVpvn("(eval)",6)));
1461 PUSHs(sv_2mortal(newSViv(0)));
1463 gimme = (I32)cx->blk_gimme;
1464 if (gimme == G_VOID)
1465 PUSHs(&PL_sv_undef);
1467 PUSHs(sv_2mortal(newSViv(gimme & G_ARRAY)));
1468 if (CxTYPE(cx) == CXt_EVAL) {
1469 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
1470 PUSHs(cx->blk_eval.cur_text);
1473 else if (cx->blk_eval.old_name) { /* Try blocks have old_name == 0. */
1474 /* Require, put the name. */
1475 PUSHs(sv_2mortal(newSVpv(cx->blk_eval.old_name, 0)));
1480 PUSHs(&PL_sv_undef);
1481 PUSHs(&PL_sv_undef);
1483 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs
1484 && PL_curcop->cop_stash == PL_debstash)
1486 AV *ary = cx->blk_sub.argarray;
1487 int off = AvARRAY(ary) - AvALLOC(ary);
1491 PL_dbargs = GvAV(gv_AVadd(tmpgv = gv_fetchpv("DB::args", TRUE,
1494 AvREAL_off(PL_dbargs); /* XXX Should be REIFY */
1497 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1498 av_extend(PL_dbargs, AvFILLp(ary) + off);
1499 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1500 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
1502 /* XXX only hints propagated via op_private are currently
1503 * visible (others are not easily accessible, since they
1504 * use the global PL_hints) */
1505 PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->op_private &
1506 HINT_PRIVATE_MASK)));
1520 sv_reset(tmps, PL_curcop->cop_stash);
1532 PL_curcop = (COP*)PL_op;
1533 TAINT_NOT; /* Each statement is presumed innocent */
1534 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
1537 if (PL_op->op_private || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
1541 register PERL_CONTEXT *cx;
1542 I32 gimme = G_ARRAY;
1549 DIE(aTHX_ "No DB::DB routine defined");
1551 if (CvDEPTH(cv) >= 1 && !(PL_debug & (1<<30))) /* don't do recursive DB::DB call */
1563 push_return(PL_op->op_next);
1564 PUSHBLOCK(cx, CXt_SUB, SP);
1567 (void)SvREFCNT_inc(cv);
1568 SAVESPTR(PL_curpad);
1569 PL_curpad = AvARRAY((AV*)*av_fetch(CvPADLIST(cv),1,FALSE));
1570 RETURNOP(CvSTART(cv));
1584 register PERL_CONTEXT *cx;
1585 I32 gimme = GIMME_V;
1592 if (PL_op->op_flags & OPf_SPECIAL) {
1594 svp = &THREADSV(PL_op->op_targ); /* per-thread variable */
1595 SAVEGENERICSV(*svp);
1599 #endif /* USE_THREADS */
1600 if (PL_op->op_targ) {
1601 svp = &PL_curpad[PL_op->op_targ]; /* "my" variable */
1605 svp = &GvSV((GV*)POPs); /* symbol table variable */
1606 SAVEGENERICSV(*svp);
1612 PUSHBLOCK(cx, CXt_LOOP, SP);
1613 PUSHLOOP(cx, svp, MARK);
1614 if (PL_op->op_flags & OPf_STACKED) {
1615 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
1616 if (SvTYPE(cx->blk_loop.iterary) != SVt_PVAV) {
1618 if (SvNIOKp(sv) || !SvPOKp(sv) ||
1619 (looks_like_number(sv) && *SvPVX(sv) != '0')) {
1620 if (SvNV(sv) < IV_MIN ||
1621 SvNV((SV*)cx->blk_loop.iterary) >= IV_MAX)
1622 DIE(aTHX_ "Range iterator outside integer range");
1623 cx->blk_loop.iterix = SvIV(sv);
1624 cx->blk_loop.itermax = SvIV((SV*)cx->blk_loop.iterary);
1627 cx->blk_loop.iterlval = newSVsv(sv);
1631 cx->blk_loop.iterary = PL_curstack;
1632 AvFILLp(PL_curstack) = SP - PL_stack_base;
1633 cx->blk_loop.iterix = MARK - PL_stack_base;
1642 register PERL_CONTEXT *cx;
1643 I32 gimme = GIMME_V;
1649 PUSHBLOCK(cx, CXt_LOOP, SP);
1650 PUSHLOOP(cx, 0, SP);
1658 register PERL_CONTEXT *cx;
1666 newsp = PL_stack_base + cx->blk_loop.resetsp;
1669 if (gimme == G_VOID)
1671 else if (gimme == G_SCALAR) {
1673 *++newsp = sv_mortalcopy(*SP);
1675 *++newsp = &PL_sv_undef;
1679 *++newsp = sv_mortalcopy(*++mark);
1680 TAINT_NOT; /* Each item is independent */
1686 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
1687 PL_curpm = newpm; /* ... and pop $1 et al */
1699 register PERL_CONTEXT *cx;
1700 bool popsub2 = FALSE;
1707 if (PL_curstackinfo->si_type == PERLSI_SORT) {
1708 if (cxstack_ix == PL_sortcxix || dopoptosub(cxstack_ix) <= PL_sortcxix) {
1709 if (cxstack_ix > PL_sortcxix)
1710 dounwind(PL_sortcxix);
1711 AvARRAY(PL_curstack)[1] = *SP;
1712 PL_stack_sp = PL_stack_base + 1;
1717 cxix = dopoptosub(cxstack_ix);
1719 DIE(aTHX_ "Can't return outside a subroutine");
1720 if (cxix < cxstack_ix)
1724 switch (CxTYPE(cx)) {
1730 if (AvFILLp(PL_comppad_name) >= 0)
1733 if (optype == OP_REQUIRE &&
1734 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
1736 /* Unassume the success we assumed earlier. */
1737 char *name = cx->blk_eval.old_name;
1738 (void)hv_delete(GvHVn(PL_incgv), name, strlen(name), G_DISCARD);
1739 DIE(aTHX_ "%s did not return a true value", name);
1743 DIE(aTHX_ "panic: return");
1747 if (gimme == G_SCALAR) {
1750 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
1752 *++newsp = SvREFCNT_inc(*SP);
1757 *++newsp = sv_mortalcopy(*SP);
1760 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
1762 *++newsp = sv_mortalcopy(*SP);
1764 *++newsp = &PL_sv_undef;
1766 else if (gimme == G_ARRAY) {
1767 while (++MARK <= SP) {
1768 *++newsp = (popsub2 && SvTEMP(*MARK))
1769 ? *MARK : sv_mortalcopy(*MARK);
1770 TAINT_NOT; /* Each item is independent */
1773 PL_stack_sp = newsp;
1775 /* Stack values are safe: */
1777 POPSUB(cx,sv); /* release CV and @_ ... */
1781 PL_curpm = newpm; /* ... and pop $1 et al */
1785 return pop_return();
1792 register PERL_CONTEXT *cx;
1802 if (PL_op->op_flags & OPf_SPECIAL) {
1803 cxix = dopoptoloop(cxstack_ix);
1805 DIE(aTHX_ "Can't \"last\" outside a block");
1808 cxix = dopoptolabel(cPVOP->op_pv);
1810 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
1812 if (cxix < cxstack_ix)
1817 switch (CxTYPE(cx)) {
1820 newsp = PL_stack_base + cx->blk_loop.resetsp;
1821 nextop = cx->blk_loop.last_op->op_next;
1825 nextop = pop_return();
1829 nextop = pop_return();
1832 DIE(aTHX_ "panic: last");
1836 if (gimme == G_SCALAR) {
1838 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
1839 ? *SP : sv_mortalcopy(*SP);
1841 *++newsp = &PL_sv_undef;
1843 else if (gimme == G_ARRAY) {
1844 while (++MARK <= SP) {
1845 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
1846 ? *MARK : sv_mortalcopy(*MARK);
1847 TAINT_NOT; /* Each item is independent */
1853 /* Stack values are safe: */
1856 POPLOOP(cx); /* release loop vars ... */
1860 POPSUB(cx,sv); /* release CV and @_ ... */
1863 PL_curpm = newpm; /* ... and pop $1 et al */
1873 register PERL_CONTEXT *cx;
1876 if (PL_op->op_flags & OPf_SPECIAL) {
1877 cxix = dopoptoloop(cxstack_ix);
1879 DIE(aTHX_ "Can't \"next\" outside a block");
1882 cxix = dopoptolabel(cPVOP->op_pv);
1884 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
1886 if (cxix < cxstack_ix)
1890 oldsave = PL_scopestack[PL_scopestack_ix - 1];
1891 LEAVE_SCOPE(oldsave);
1892 return cx->blk_loop.next_op;
1898 register PERL_CONTEXT *cx;
1901 if (PL_op->op_flags & OPf_SPECIAL) {
1902 cxix = dopoptoloop(cxstack_ix);
1904 DIE(aTHX_ "Can't \"redo\" outside a block");
1907 cxix = dopoptolabel(cPVOP->op_pv);
1909 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
1911 if (cxix < cxstack_ix)
1915 oldsave = PL_scopestack[PL_scopestack_ix - 1];
1916 LEAVE_SCOPE(oldsave);
1917 return cx->blk_loop.redo_op;
1921 S_dofindlabel(pTHX_ OP *o, char *label, OP **opstack, OP **oplimit)
1925 static char too_deep[] = "Target of goto is too deeply nested";
1928 Perl_croak(aTHX_ too_deep);
1929 if (o->op_type == OP_LEAVE ||
1930 o->op_type == OP_SCOPE ||
1931 o->op_type == OP_LEAVELOOP ||
1932 o->op_type == OP_LEAVETRY)
1934 *ops++ = cUNOPo->op_first;
1936 Perl_croak(aTHX_ too_deep);
1939 if (o->op_flags & OPf_KIDS) {
1941 /* First try all the kids at this level, since that's likeliest. */
1942 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
1943 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
1944 kCOP->cop_label && strEQ(kCOP->cop_label, label))
1947 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
1948 if (kid == PL_lastgotoprobe)
1950 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
1952 (ops[-1]->op_type != OP_NEXTSTATE &&
1953 ops[-1]->op_type != OP_DBSTATE)))
1955 if (o = dofindlabel(kid, label, ops, oplimit))
1974 register PERL_CONTEXT *cx;
1975 #define GOTO_DEPTH 64
1976 OP *enterops[GOTO_DEPTH];
1978 int do_dump = (PL_op->op_type == OP_DUMP);
1979 static char must_have_label[] = "goto must have label";
1982 if (PL_op->op_flags & OPf_STACKED) {
1986 /* This egregious kludge implements goto &subroutine */
1987 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
1989 register PERL_CONTEXT *cx;
1990 CV* cv = (CV*)SvRV(sv);
1996 if (!CvROOT(cv) && !CvXSUB(cv)) {
2001 /* autoloaded stub? */
2002 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2004 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2005 GvNAMELEN(gv), FALSE);
2006 if (autogv && (cv = GvCV(autogv)))
2008 tmpstr = sv_newmortal();
2009 gv_efullname3(tmpstr, gv, Nullch);
2010 DIE(aTHX_ "Goto undefined subroutine &%s",SvPVX(tmpstr));
2012 DIE(aTHX_ "Goto undefined subroutine");
2015 /* First do some returnish stuff. */
2016 cxix = dopoptosub(cxstack_ix);
2018 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
2019 if (cxix < cxstack_ix)
2022 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_ENTEREVAL)
2023 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2025 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs) {
2026 /* put @_ back onto stack */
2027 AV* av = cx->blk_sub.argarray;
2029 items = AvFILLp(av) + 1;
2031 EXTEND(PL_stack_sp, items); /* @_ could have been extended. */
2032 Copy(AvARRAY(av), PL_stack_sp, items, SV*);
2033 PL_stack_sp += items;
2035 SvREFCNT_dec(GvAV(PL_defgv));
2036 GvAV(PL_defgv) = cx->blk_sub.savearray;
2037 #endif /* USE_THREADS */
2038 /* abandon @_ if it got reified */
2040 (void)sv_2mortal((SV*)av); /* delay until return */
2042 av_extend(av, items-1);
2043 AvFLAGS(av) = AVf_REIFY;
2044 PL_curpad[0] = (SV*)(cx->blk_sub.argarray = av);
2047 else if (CvXSUB(cv)) { /* put GvAV(defgv) back onto stack */
2051 av = (AV*)PL_curpad[0];
2053 av = GvAV(PL_defgv);
2055 items = AvFILLp(av) + 1;
2057 EXTEND(PL_stack_sp, items); /* @_ could have been extended. */
2058 Copy(AvARRAY(av), PL_stack_sp, items, SV*);
2059 PL_stack_sp += items;
2061 if (CxTYPE(cx) == CXt_SUB &&
2062 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
2063 SvREFCNT_dec(cx->blk_sub.cv);
2064 oldsave = PL_scopestack[PL_scopestack_ix - 1];
2065 LEAVE_SCOPE(oldsave);
2067 /* Now do some callish stuff. */
2070 #ifdef PERL_XSUB_OLDSTYLE
2071 if (CvOLDSTYLE(cv)) {
2072 I32 (*fp3)(int,int,int);
2077 fp3 = (I32(*)(int,int,int)))CvXSUB(cv;
2078 items = (*fp3)(CvXSUBANY(cv).any_i32,
2079 mark - PL_stack_base + 1,
2081 SP = PL_stack_base + items;
2084 #endif /* PERL_XSUB_OLDSTYLE */
2089 PL_stack_sp--; /* There is no cv arg. */
2090 /* Push a mark for the start of arglist */
2092 (void)(*CvXSUB(cv))(aTHXo_ cv);
2093 /* Pop the current context like a decent sub should */
2094 POPBLOCK(cx, PL_curpm);
2095 /* Do _not_ use PUTBACK, keep the XSUB's return stack! */
2098 return pop_return();
2101 AV* padlist = CvPADLIST(cv);
2102 SV** svp = AvARRAY(padlist);
2103 if (CxTYPE(cx) == CXt_EVAL) {
2104 PL_in_eval = cx->blk_eval.old_in_eval;
2105 PL_eval_root = cx->blk_eval.old_eval_root;
2106 cx->cx_type = CXt_SUB;
2107 cx->blk_sub.hasargs = 0;
2109 cx->blk_sub.cv = cv;
2110 cx->blk_sub.olddepth = CvDEPTH(cv);
2112 if (CvDEPTH(cv) < 2)
2113 (void)SvREFCNT_inc(cv);
2114 else { /* save temporaries on recursion? */
2115 PERL_STACK_OVERFLOW_CHECK();
2116 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION))
2117 sub_crush_depth(cv);
2118 if (CvDEPTH(cv) > AvFILLp(padlist)) {
2119 AV *newpad = newAV();
2120 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
2121 I32 ix = AvFILLp((AV*)svp[1]);
2122 svp = AvARRAY(svp[0]);
2123 for ( ;ix > 0; ix--) {
2124 if (svp[ix] != &PL_sv_undef) {
2125 char *name = SvPVX(svp[ix]);
2126 if ((SvFLAGS(svp[ix]) & SVf_FAKE)
2129 /* outer lexical or anon code */
2130 av_store(newpad, ix,
2131 SvREFCNT_inc(oldpad[ix]) );
2133 else { /* our own lexical */
2135 av_store(newpad, ix, sv = (SV*)newAV());
2136 else if (*name == '%')
2137 av_store(newpad, ix, sv = (SV*)newHV());
2139 av_store(newpad, ix, sv = NEWSV(0,0));
2144 av_store(newpad, ix, sv = NEWSV(0,0));
2148 if (cx->blk_sub.hasargs) {
2151 av_store(newpad, 0, (SV*)av);
2152 AvFLAGS(av) = AVf_REIFY;
2154 av_store(padlist, CvDEPTH(cv), (SV*)newpad);
2155 AvFILLp(padlist) = CvDEPTH(cv);
2156 svp = AvARRAY(padlist);
2160 if (!cx->blk_sub.hasargs) {
2161 AV* av = (AV*)PL_curpad[0];
2163 items = AvFILLp(av) + 1;
2165 /* Mark is at the end of the stack. */
2167 Copy(AvARRAY(av), SP + 1, items, SV*);
2172 #endif /* USE_THREADS */
2173 SAVESPTR(PL_curpad);
2174 PL_curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
2176 if (cx->blk_sub.hasargs)
2177 #endif /* USE_THREADS */
2179 AV* av = (AV*)PL_curpad[0];
2183 cx->blk_sub.savearray = GvAV(PL_defgv);
2184 GvAV(PL_defgv) = (AV*)SvREFCNT_inc(av);
2185 #endif /* USE_THREADS */
2186 cx->blk_sub.argarray = av;
2189 if (items >= AvMAX(av) + 1) {
2191 if (AvARRAY(av) != ary) {
2192 AvMAX(av) += AvARRAY(av) - AvALLOC(av);
2193 SvPVX(av) = (char*)ary;
2195 if (items >= AvMAX(av) + 1) {
2196 AvMAX(av) = items - 1;
2197 Renew(ary,items+1,SV*);
2199 SvPVX(av) = (char*)ary;
2202 Copy(mark,AvARRAY(av),items,SV*);
2203 AvFILLp(av) = items - 1;
2204 assert(!AvREAL(av));
2211 if (PERLDB_SUB) { /* Checking curstash breaks DProf. */
2213 * We do not care about using sv to call CV;
2214 * it's for informational purposes only.
2216 SV *sv = GvSV(PL_DBsub);
2219 if (PERLDB_SUB_NN) {
2220 SvIVX(sv) = PTR2IV(cv); /* Already upgraded, saved */
2223 gv_efullname3(sv, CvGV(cv), Nullch);
2226 && (gotocv = get_cv("DB::goto", FALSE)) ) {
2227 PUSHMARK( PL_stack_sp );
2228 call_sv((SV*)gotocv, G_SCALAR | G_NODEBUG);
2232 RETURNOP(CvSTART(cv));
2236 label = SvPV(sv,n_a);
2237 if (!(do_dump || *label))
2238 DIE(aTHX_ must_have_label);
2241 else if (PL_op->op_flags & OPf_SPECIAL) {
2243 DIE(aTHX_ must_have_label);
2246 label = cPVOP->op_pv;
2248 if (label && *label) {
2253 PL_lastgotoprobe = 0;
2255 for (ix = cxstack_ix; ix >= 0; ix--) {
2257 switch (CxTYPE(cx)) {
2259 gotoprobe = PL_eval_root; /* XXX not good for nested eval */
2262 gotoprobe = cx->blk_oldcop->op_sibling;
2268 gotoprobe = cx->blk_oldcop->op_sibling;
2270 gotoprobe = PL_main_root;
2273 if (CvDEPTH(cx->blk_sub.cv)) {
2274 gotoprobe = CvROOT(cx->blk_sub.cv);
2279 DIE(aTHX_ "Can't \"goto\" outside a block");
2282 DIE(aTHX_ "panic: goto");
2283 gotoprobe = PL_main_root;
2286 retop = dofindlabel(gotoprobe, label,
2287 enterops, enterops + GOTO_DEPTH);
2290 PL_lastgotoprobe = gotoprobe;
2293 DIE(aTHX_ "Can't find label %s", label);
2295 /* pop unwanted frames */
2297 if (ix < cxstack_ix) {
2304 oldsave = PL_scopestack[PL_scopestack_ix];
2305 LEAVE_SCOPE(oldsave);
2308 /* push wanted frames */
2310 if (*enterops && enterops[1]) {
2312 for (ix = 1; enterops[ix]; ix++) {
2313 PL_op = enterops[ix];
2314 /* Eventually we may want to stack the needed arguments
2315 * for each op. For now, we punt on the hard ones. */
2316 if (PL_op->op_type == OP_ENTERITER)
2317 DIE(aTHX_ "Can't \"goto\" into the middle of a foreach loop",
2319 CALL_FPTR(PL_op->op_ppaddr)(aTHX);
2327 if (!retop) retop = PL_main_start;
2329 PL_restartop = retop;
2330 PL_do_undump = TRUE;
2334 PL_restartop = 0; /* hmm, must be GNU unexec().. */
2335 PL_do_undump = FALSE;
2351 if (anum == 1 && VMSISH_EXIT)
2356 PUSHs(&PL_sv_undef);
2364 NV value = SvNVx(GvSV(cCOP->cop_gv));
2365 register I32 match = I_32(value);
2368 if (((NV)match) > value)
2369 --match; /* was fractional--truncate other way */
2371 match -= cCOP->uop.scop.scop_offset;
2374 else if (match > cCOP->uop.scop.scop_max)
2375 match = cCOP->uop.scop.scop_max;
2376 PL_op = cCOP->uop.scop.scop_next[match];
2386 PL_op = PL_op->op_next; /* can't assume anything */
2389 match = *(SvPVx(GvSV(cCOP->cop_gv), n_a)) & 255;
2390 match -= cCOP->uop.scop.scop_offset;
2393 else if (match > cCOP->uop.scop.scop_max)
2394 match = cCOP->uop.scop.scop_max;
2395 PL_op = cCOP->uop.scop.scop_next[match];
2404 S_save_lines(pTHX_ AV *array, SV *sv)
2406 register char *s = SvPVX(sv);
2407 register char *send = SvPVX(sv) + SvCUR(sv);
2409 register I32 line = 1;
2411 while (s && s < send) {
2412 SV *tmpstr = NEWSV(85,0);
2414 sv_upgrade(tmpstr, SVt_PVMG);
2415 t = strchr(s, '\n');
2421 sv_setpvn(tmpstr, s, t - s);
2422 av_store(array, line++, tmpstr);
2428 S_docatch_body(pTHX_ va_list args)
2435 S_docatch(pTHX_ OP *o)
2440 volatile PERL_SI *cursi = PL_curstackinfo;
2444 assert(CATCH_GET == TRUE);
2448 CALLPROTECT(aTHX_ pcur_env, &ret, MEMBER_TO_FPTR(S_docatch_body));
2453 if (PL_restartop && cursi == PL_curstackinfo) {
2454 PL_op = PL_restartop;
2469 Perl_sv_compile_2op(pTHX_ SV *sv, OP** startop, char *code, AV** avp)
2470 /* sv Text to convert to OP tree. */
2471 /* startop op_free() this to undo. */
2472 /* code Short string id of the caller. */
2474 dSP; /* Make POPBLOCK work. */
2477 I32 gimme = 0; /* SUSPECT - INITIALZE TO WHAT? NI-S */
2480 OP *oop = PL_op, *rop;
2481 char tmpbuf[TYPE_DIGITS(long) + 12 + 10];
2487 /* switch to eval mode */
2489 if (PL_curcop == &PL_compiling) {
2490 SAVESPTR(PL_compiling.cop_stash);
2491 PL_compiling.cop_stash = PL_curstash;
2493 SAVESPTR(PL_compiling.cop_filegv);
2494 SAVEI16(PL_compiling.cop_line);
2495 sprintf(tmpbuf, "_<(%.10s_eval %lu)", code, (unsigned long)++PL_evalseq);
2496 PL_compiling.cop_filegv = gv_fetchfile(tmpbuf+2);
2497 PL_compiling.cop_line = 1;
2498 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
2499 deleting the eval's FILEGV from the stash before gv_check() runs
2500 (i.e. before run-time proper). To work around the coredump that
2501 ensues, we always turn GvMULTI_on for any globals that were
2502 introduced within evals. See force_ident(). GSAR 96-10-12 */
2503 safestr = savepv(tmpbuf);
2504 SAVEDELETE(PL_defstash, safestr, strlen(safestr));
2506 #ifdef OP_IN_REGISTER
2514 PL_op->op_type = OP_ENTEREVAL;
2515 PL_op->op_flags = 0; /* Avoid uninit warning. */
2516 PUSHBLOCK(cx, CXt_EVAL, SP);
2517 PUSHEVAL(cx, 0, PL_compiling.cop_filegv);
2518 rop = doeval(G_SCALAR, startop);
2519 POPBLOCK(cx,PL_curpm);
2522 (*startop)->op_type = OP_NULL;
2523 (*startop)->op_ppaddr = PL_ppaddr[OP_NULL];
2525 *avp = (AV*)SvREFCNT_inc(PL_comppad);
2527 if (PL_curcop == &PL_compiling)
2528 PL_compiling.op_private = PL_hints;
2529 #ifdef OP_IN_REGISTER
2535 /* With USE_THREADS, eval_owner must be held on entry to doeval */
2537 S_doeval(pTHX_ int gimme, OP** startop)
2546 PL_in_eval = EVAL_INEVAL;
2550 /* set up a scratch pad */
2553 SAVESPTR(PL_curpad);
2554 SAVESPTR(PL_comppad);
2555 SAVESPTR(PL_comppad_name);
2556 SAVEI32(PL_comppad_name_fill);
2557 SAVEI32(PL_min_intro_pending);
2558 SAVEI32(PL_max_intro_pending);
2561 for (i = cxstack_ix - 1; i >= 0; i--) {
2562 PERL_CONTEXT *cx = &cxstack[i];
2563 if (CxTYPE(cx) == CXt_EVAL)
2565 else if (CxTYPE(cx) == CXt_SUB) {
2566 caller = cx->blk_sub.cv;
2571 SAVESPTR(PL_compcv);
2572 PL_compcv = (CV*)NEWSV(1104,0);
2573 sv_upgrade((SV *)PL_compcv, SVt_PVCV);
2574 CvEVAL_on(PL_compcv);
2576 CvOWNER(PL_compcv) = 0;
2577 New(666, CvMUTEXP(PL_compcv), 1, perl_mutex);
2578 MUTEX_INIT(CvMUTEXP(PL_compcv));
2579 #endif /* USE_THREADS */
2581 PL_comppad = newAV();
2582 av_push(PL_comppad, Nullsv);
2583 PL_curpad = AvARRAY(PL_comppad);
2584 PL_comppad_name = newAV();
2585 PL_comppad_name_fill = 0;
2586 PL_min_intro_pending = 0;
2589 av_store(PL_comppad_name, 0, newSVpvn("@_", 2));
2590 PL_curpad[0] = (SV*)newAV();
2591 SvPADMY_on(PL_curpad[0]); /* XXX Needed? */
2592 #endif /* USE_THREADS */
2594 comppadlist = newAV();
2595 AvREAL_off(comppadlist);
2596 av_store(comppadlist, 0, (SV*)PL_comppad_name);
2597 av_store(comppadlist, 1, (SV*)PL_comppad);
2598 CvPADLIST(PL_compcv) = comppadlist;
2600 if (!saveop || saveop->op_type != OP_REQUIRE)
2601 CvOUTSIDE(PL_compcv) = (CV*)SvREFCNT_inc(caller);
2603 SAVEFREESV(PL_compcv);
2605 /* make sure we compile in the right package */
2607 newstash = PL_curcop->cop_stash;
2608 if (PL_curstash != newstash) {
2609 SAVESPTR(PL_curstash);
2610 PL_curstash = newstash;
2612 SAVESPTR(PL_beginav);
2613 PL_beginav = newAV();
2614 SAVEFREESV(PL_beginav);
2616 /* try to compile it */
2618 PL_eval_root = Nullop;
2620 PL_curcop = &PL_compiling;
2621 PL_curcop->cop_arybase = 0;
2622 SvREFCNT_dec(PL_rs);
2623 PL_rs = newSVpvn("\n", 1);
2624 if (saveop && saveop->op_flags & OPf_SPECIAL)
2625 PL_in_eval |= EVAL_KEEPERR;
2628 if (yyparse() || PL_error_count || !PL_eval_root) {
2632 I32 optype = 0; /* Might be reset by POPEVAL. */
2637 op_free(PL_eval_root);
2638 PL_eval_root = Nullop;
2640 SP = PL_stack_base + POPMARK; /* pop original mark */
2642 POPBLOCK(cx,PL_curpm);
2648 if (optype == OP_REQUIRE) {
2649 char* msg = SvPVx(ERRSV, n_a);
2650 DIE(aTHX_ "%sCompilation failed in require",
2651 *msg ? msg : "Unknown error\n");
2654 char* msg = SvPVx(ERRSV, n_a);
2656 POPBLOCK(cx,PL_curpm);
2658 Perl_croak(aTHX_ "%sCompilation failed in regexp",
2659 (*msg ? msg : "Unknown error\n"));
2661 SvREFCNT_dec(PL_rs);
2662 PL_rs = SvREFCNT_inc(PL_nrs);
2664 MUTEX_LOCK(&PL_eval_mutex);
2666 COND_SIGNAL(&PL_eval_cond);
2667 MUTEX_UNLOCK(&PL_eval_mutex);
2668 #endif /* USE_THREADS */
2671 SvREFCNT_dec(PL_rs);
2672 PL_rs = SvREFCNT_inc(PL_nrs);
2673 PL_compiling.cop_line = 0;
2675 *startop = PL_eval_root;
2676 SvREFCNT_dec(CvOUTSIDE(PL_compcv));
2677 CvOUTSIDE(PL_compcv) = Nullcv;
2679 SAVEFREEOP(PL_eval_root);
2681 scalarvoid(PL_eval_root);
2682 else if (gimme & G_ARRAY)
2685 scalar(PL_eval_root);
2687 DEBUG_x(dump_eval());
2689 /* Register with debugger: */
2690 if (PERLDB_INTER && saveop->op_type == OP_REQUIRE) {
2691 CV *cv = get_cv("DB::postponed", FALSE);
2695 XPUSHs((SV*)PL_compiling.cop_filegv);
2697 call_sv((SV*)cv, G_DISCARD);
2701 /* compiled okay, so do it */
2703 CvDEPTH(PL_compcv) = 1;
2704 SP = PL_stack_base + POPMARK; /* pop original mark */
2705 PL_op = saveop; /* The caller may need it. */
2707 MUTEX_LOCK(&PL_eval_mutex);
2709 COND_SIGNAL(&PL_eval_cond);
2710 MUTEX_UNLOCK(&PL_eval_mutex);
2711 #endif /* USE_THREADS */
2713 RETURNOP(PL_eval_start);
2717 S_doopen_pmc(pTHX_ const char *name, const char *mode)
2719 STRLEN namelen = strlen(name);
2722 if (namelen > 3 && strEQ(name + namelen - 3, ".pm")) {
2723 SV *pmcsv = Perl_newSVpvf(aTHX_ "%s%c", name, 'c');
2724 char *pmc = SvPV_nolen(pmcsv);
2727 if (PerlLIO_stat(pmc, &pmcstat) < 0) {
2728 fp = PerlIO_open(name, mode);
2731 if (PerlLIO_stat(name, &pmstat) < 0 ||
2732 pmstat.st_mtime < pmcstat.st_mtime)
2734 fp = PerlIO_open(pmc, mode);
2737 fp = PerlIO_open(name, mode);
2740 SvREFCNT_dec(pmcsv);
2743 fp = PerlIO_open(name, mode);
2751 register PERL_CONTEXT *cx;
2756 SV *namesv = Nullsv;
2758 I32 gimme = G_SCALAR;
2759 PerlIO *tryrsfp = 0;
2761 int filter_has_file = 0;
2762 GV *filter_child_proc = 0;
2763 SV *filter_state = 0;
2767 if (SvNIOKp(sv) && !SvPOKp(sv)) {
2768 if (Atof(PL_patchlevel) + 0.00000999 < SvNV(sv))
2769 DIE(aTHX_ "Perl %s required--this is only version %s, stopped",
2770 SvPV(sv,n_a),PL_patchlevel);
2773 name = SvPV(sv, len);
2774 if (!(name && len > 0 && *name))
2775 DIE(aTHX_ "Null filename used");
2776 TAINT_PROPER("require");
2777 if (PL_op->op_type == OP_REQUIRE &&
2778 (svp = hv_fetch(GvHVn(PL_incgv), name, len, 0)) &&
2779 *svp != &PL_sv_undef)
2782 /* prepare to compile file */
2784 #ifdef MACOS_TRADITIONAL
2785 if (strchr(name, ':')
2790 (name[1] == '.' && name[2] == '/')))
2792 || (name[0] && name[1] == ':')
2795 || (name[0] == '\\' && name[1] == '\\') /* UNC path */
2798 || (strchr(name,':') || ((*name == '[' || *name == '<') &&
2799 (isALNUM(name[1]) || strchr("$-_]>",name[1]))))
2805 tryrsfp = doopen_pmc(name,PERL_SCRIPT_MODE);
2806 #ifdef MACOS_TRADITIONAL
2807 /* We consider paths of the form :a:b ambiguous and interpret them first
2808 as global then as local
2810 if (name[0] == ':' && !tryrsfp && name[1] != ':' && strchr(name+2, ':'))
2814 #ifdef MACOS_TRADITIONAL
2820 AV *ar = GvAVn(PL_incgv);
2824 if ((unixname = tounixspec(name, Nullch)) != Nullch)
2827 namesv = NEWSV(806, 0);
2828 for (i = 0; i <= AvFILL(ar); i++) {
2829 SV *dirsv = *av_fetch(ar, i, TRUE);
2835 if (SvTYPE(SvRV(loader)) == SVt_PVAV) {
2836 loader = *av_fetch((AV *)SvRV(loader), 0, TRUE);
2839 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
2840 PTR2UV(SvANY(loader)), name);
2841 tryname = SvPVX(namesv);
2852 count = call_sv(loader, G_ARRAY);
2862 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVGV) {
2866 if (SvTYPE(arg) == SVt_PVGV) {
2867 IO *io = GvIO((GV *)arg);
2872 tryrsfp = IoIFP(io);
2873 if (IoTYPE(io) == '|') {
2874 /* reading from a child process doesn't
2875 nest -- when returning from reading
2876 the inner module, the outer one is
2877 unreadable (closed?) I've tried to
2878 save the gv to manage the lifespan of
2879 the pipe, but this didn't help. XXX */
2880 filter_child_proc = (GV *)arg;
2881 (void)SvREFCNT_inc(filter_child_proc);
2884 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
2885 PerlIO_close(IoOFP(io));
2897 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
2899 (void)SvREFCNT_inc(filter_sub);
2902 filter_state = SP[i];
2903 (void)SvREFCNT_inc(filter_state);
2907 tryrsfp = PerlIO_open("/dev/null",
2921 filter_has_file = 0;
2922 if (filter_child_proc) {
2923 SvREFCNT_dec(filter_child_proc);
2924 filter_child_proc = 0;
2927 SvREFCNT_dec(filter_state);
2931 SvREFCNT_dec(filter_sub);
2936 char *dir = SvPVx(dirsv, n_a);
2937 #ifdef MACOS_TRADITIONAL
2938 /* We have ensured in incpush that library ends with ':' */
2939 int dirlen = strlen(dir);
2940 char *colon = strchr(dir, ':') ? "" : ":";
2941 int colons = (dir[dirlen-1] == ':') + (*name == ':');
2945 sv_setpvfaTHX_ (namesv, "%s%s%s", colon, dir, name+1);
2948 sv_setpvf(aTHX_ namesv, "%s%s%s", colon, dir, name);
2951 sv_setpvf(aTHX_ namesv, "%s%s:%s", colon, dir, name);
2957 if ((unixdir = tounixpath(dir, Nullch)) == Nullch)
2959 sv_setpv(namesv, unixdir);
2960 sv_catpv(namesv, unixname);
2962 Perl_sv_setpvf(aTHX_ namesv, "%s/%s", dir, name);
2965 TAINT_PROPER("require");
2966 tryname = SvPVX(namesv);
2967 #ifdef MACOS_TRADITIONAL
2968 for (colon = tryname+dirlen; colon = strchr(colon, '/'); )
2971 tryrsfp = doopen_pmc(tryname, PERL_SCRIPT_MODE);
2973 if (tryname[0] == '.' && tryname[1] == '/')
2981 SAVESPTR(PL_compiling.cop_filegv);
2982 PL_compiling.cop_filegv = gv_fetchfile(tryrsfp ? tryname : name);
2983 SvREFCNT_dec(namesv);
2985 if (PL_op->op_type == OP_REQUIRE) {
2986 char *msgstr = name;
2987 if (namesv) { /* did we lookup @INC? */
2988 SV *msg = sv_2mortal(newSVpv(msgstr,0));
2989 SV *dirmsgsv = NEWSV(0, 0);
2990 AV *ar = GvAVn(PL_incgv);
2992 sv_catpvn(msg, " in @INC", 8);
2993 if (instr(SvPVX(msg), ".h "))
2994 sv_catpv(msg, " (change .h to .ph maybe?)");
2995 if (instr(SvPVX(msg), ".ph "))
2996 sv_catpv(msg, " (did you run h2ph?)");
2997 sv_catpv(msg, " (@INC contains:");
2998 for (i = 0; i <= AvFILL(ar); i++) {
2999 char *dir = SvPVx(*av_fetch(ar, i, TRUE), n_a);
3000 Perl_sv_setpvf(aTHX_ dirmsgsv, " %s", dir);
3001 sv_catsv(msg, dirmsgsv);
3003 sv_catpvn(msg, ")", 1);
3004 SvREFCNT_dec(dirmsgsv);
3005 msgstr = SvPV_nolen(msg);
3007 DIE(aTHX_ "Can't locate %s", msgstr);
3013 SETERRNO(0, SS$_NORMAL);
3015 /* Assume success here to prevent recursive requirement. */
3016 (void)hv_store(GvHVn(PL_incgv), name, strlen(name),
3017 newSVsv(GvSV(PL_compiling.cop_filegv)), 0 );
3021 lex_start(sv_2mortal(newSVpvn("",0)));
3022 SAVEGENERICSV(PL_rsfp_filters);
3023 PL_rsfp_filters = Nullav;
3026 name = savepv(name);
3030 SAVEPPTR(PL_compiling.cop_warnings);
3031 if (PL_dowarn & G_WARN_ALL_ON)
3032 PL_compiling.cop_warnings = WARN_ALL ;
3033 else if (PL_dowarn & G_WARN_ALL_OFF)
3034 PL_compiling.cop_warnings = WARN_NONE ;
3036 PL_compiling.cop_warnings = WARN_STD ;
3038 if (filter_sub || filter_child_proc) {
3039 SV *datasv = filter_add(run_user_filter, Nullsv);
3040 IoLINES(datasv) = filter_has_file;
3041 IoFMT_GV(datasv) = (GV *)filter_child_proc;
3042 IoTOP_GV(datasv) = (GV *)filter_state;
3043 IoBOTTOM_GV(datasv) = (GV *)filter_sub;
3046 /* switch to eval mode */
3047 push_return(PL_op->op_next);
3048 PUSHBLOCK(cx, CXt_EVAL, SP);
3049 PUSHEVAL(cx, name, PL_compiling.cop_filegv);
3051 SAVEI16(PL_compiling.cop_line);
3052 PL_compiling.cop_line = 0;
3056 MUTEX_LOCK(&PL_eval_mutex);
3057 if (PL_eval_owner && PL_eval_owner != thr)
3058 while (PL_eval_owner)
3059 COND_WAIT(&PL_eval_cond, &PL_eval_mutex);
3060 PL_eval_owner = thr;
3061 MUTEX_UNLOCK(&PL_eval_mutex);
3062 #endif /* USE_THREADS */
3063 return DOCATCH(doeval(G_SCALAR, NULL));
3068 return pp_require();
3074 register PERL_CONTEXT *cx;
3076 I32 gimme = GIMME_V, was = PL_sub_generation;
3077 char tmpbuf[TYPE_DIGITS(long) + 12];
3082 if (!SvPV(sv,len) || !len)
3084 TAINT_PROPER("eval");
3090 /* switch to eval mode */
3092 SAVESPTR(PL_compiling.cop_filegv);
3093 sprintf(tmpbuf, "_<(eval %lu)", (unsigned long)++PL_evalseq);
3094 PL_compiling.cop_filegv = gv_fetchfile(tmpbuf+2);
3095 PL_compiling.cop_line = 1;
3096 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
3097 deleting the eval's FILEGV from the stash before gv_check() runs
3098 (i.e. before run-time proper). To work around the coredump that
3099 ensues, we always turn GvMULTI_on for any globals that were
3100 introduced within evals. See force_ident(). GSAR 96-10-12 */
3101 safestr = savepv(tmpbuf);
3102 SAVEDELETE(PL_defstash, safestr, strlen(safestr));
3104 PL_hints = PL_op->op_targ;
3105 SAVEPPTR(PL_compiling.cop_warnings);
3106 if (!specialWARN(PL_compiling.cop_warnings)) {
3107 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
3108 SAVEFREESV(PL_compiling.cop_warnings) ;
3111 push_return(PL_op->op_next);
3112 PUSHBLOCK(cx, (CXt_EVAL|CXp_REAL), SP);
3113 PUSHEVAL(cx, 0, PL_compiling.cop_filegv);
3115 /* prepare to compile string */
3117 if (PERLDB_LINE && PL_curstash != PL_debstash)
3118 save_lines(GvAV(PL_compiling.cop_filegv), PL_linestr);
3121 MUTEX_LOCK(&PL_eval_mutex);
3122 if (PL_eval_owner && PL_eval_owner != thr)
3123 while (PL_eval_owner)
3124 COND_WAIT(&PL_eval_cond, &PL_eval_mutex);
3125 PL_eval_owner = thr;
3126 MUTEX_UNLOCK(&PL_eval_mutex);
3127 #endif /* USE_THREADS */
3128 ret = doeval(gimme, NULL);
3129 if (PERLDB_INTER && was != PL_sub_generation /* Some subs defined here. */
3130 && ret != PL_op->op_next) { /* Successive compilation. */
3131 strcpy(safestr, "_<(eval )"); /* Anything fake and short. */
3133 return DOCATCH(ret);
3143 register PERL_CONTEXT *cx;
3145 U8 save_flags = PL_op -> op_flags;
3150 retop = pop_return();
3153 if (gimme == G_VOID)
3155 else if (gimme == G_SCALAR) {
3158 if (SvFLAGS(TOPs) & SVs_TEMP)
3161 *MARK = sv_mortalcopy(TOPs);
3165 *MARK = &PL_sv_undef;
3170 /* in case LEAVE wipes old return values */
3171 for (mark = newsp + 1; mark <= SP; mark++) {
3172 if (!(SvFLAGS(*mark) & SVs_TEMP)) {
3173 *mark = sv_mortalcopy(*mark);
3174 TAINT_NOT; /* Each item is independent */
3178 PL_curpm = newpm; /* Don't pop $1 et al till now */
3180 if (AvFILLp(PL_comppad_name) >= 0)
3184 assert(CvDEPTH(PL_compcv) == 1);
3186 CvDEPTH(PL_compcv) = 0;
3189 if (optype == OP_REQUIRE &&
3190 !(gimme == G_SCALAR ? SvTRUE(*SP) : SP > newsp))
3192 /* Unassume the success we assumed earlier. */
3193 char *name = cx->blk_eval.old_name;
3194 (void)hv_delete(GvHVn(PL_incgv), name, strlen(name), G_DISCARD);
3195 retop = Perl_die(aTHX_ "%s did not return a true value", name);
3196 /* die_where() did LEAVE, or we won't be here */
3200 if (!(save_flags & OPf_SPECIAL))
3210 register PERL_CONTEXT *cx;
3211 I32 gimme = GIMME_V;
3216 push_return(cLOGOP->op_other->op_next);
3217 PUSHBLOCK(cx, CXt_EVAL, SP);
3219 PL_eval_root = PL_op; /* Only needed so that goto works right. */
3221 PL_in_eval = EVAL_INEVAL;
3224 return DOCATCH(PL_op->op_next);
3234 register PERL_CONTEXT *cx;
3242 if (gimme == G_VOID)
3244 else if (gimme == G_SCALAR) {
3247 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
3250 *MARK = sv_mortalcopy(TOPs);
3254 *MARK = &PL_sv_undef;
3259 /* in case LEAVE wipes old return values */
3260 for (mark = newsp + 1; mark <= SP; mark++) {
3261 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
3262 *mark = sv_mortalcopy(*mark);
3263 TAINT_NOT; /* Each item is independent */
3267 PL_curpm = newpm; /* Don't pop $1 et al till now */
3275 S_doparseform(pTHX_ SV *sv)
3278 register char *s = SvPV_force(sv, len);
3279 register char *send = s + len;
3280 register char *base;
3281 register I32 skipspaces = 0;
3284 bool postspace = FALSE;
3292 Perl_croak(aTHX_ "Null picture in formline");
3294 New(804, fops, (send - s)*3+10, U16); /* Almost certainly too long... */
3299 *fpc++ = FF_LINEMARK;
3300 noblank = repeat = FALSE;
3318 case ' ': case '\t':
3329 *fpc++ = FF_LITERAL;
3337 *fpc++ = skipspaces;
3341 *fpc++ = FF_NEWLINE;
3345 arg = fpc - linepc + 1;
3352 *fpc++ = FF_LINEMARK;
3353 noblank = repeat = FALSE;
3362 ischop = s[-1] == '^';
3368 arg = (s - base) - 1;
3370 *fpc++ = FF_LITERAL;
3379 *fpc++ = FF_LINEGLOB;
3381 else if (*s == '#' || (*s == '.' && s[1] == '#')) {
3382 arg = ischop ? 512 : 0;
3392 arg |= 256 + (s - f);
3394 *fpc++ = s - base; /* fieldsize for FETCH */
3395 *fpc++ = FF_DECIMAL;
3400 bool ismore = FALSE;
3403 while (*++s == '>') ;
3404 prespace = FF_SPACE;
3406 else if (*s == '|') {
3407 while (*++s == '|') ;
3408 prespace = FF_HALFSPACE;
3413 while (*++s == '<') ;
3416 if (*s == '.' && s[1] == '.' && s[2] == '.') {
3420 *fpc++ = s - base; /* fieldsize for FETCH */
3422 *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL;
3440 { /* need to jump to the next word */
3442 z = WORD_ALIGN - SvCUR(sv) % WORD_ALIGN;
3443 SvGROW(sv, SvCUR(sv) + z + arg * sizeof(U16) + 4);
3444 s = SvPVX(sv) + SvCUR(sv) + z;
3446 Copy(fops, s, arg, U16);
3448 sv_magic(sv, Nullsv, 'f', Nullch, 0);
3453 * The rest of this file was derived from source code contributed
3456 * NOTE: this code was derived from Tom Horsley's qsort replacement
3457 * and should not be confused with the original code.
3460 /* Copyright (C) Tom Horsley, 1997. All rights reserved.
3462 Permission granted to distribute under the same terms as perl which are
3465 This program is free software; you can redistribute it and/or modify
3466 it under the terms of either:
3468 a) the GNU General Public License as published by the Free
3469 Software Foundation; either version 1, or (at your option) any
3472 b) the "Artistic License" which comes with this Kit.
3474 Details on the perl license can be found in the perl source code which
3475 may be located via the www.perl.com web page.
3477 This is the most wonderfulest possible qsort I can come up with (and
3478 still be mostly portable) My (limited) tests indicate it consistently
3479 does about 20% fewer calls to compare than does the qsort in the Visual
3480 C++ library, other vendors may vary.
3482 Some of the ideas in here can be found in "Algorithms" by Sedgewick,
3483 others I invented myself (or more likely re-invented since they seemed
3484 pretty obvious once I watched the algorithm operate for a while).
3486 Most of this code was written while watching the Marlins sweep the Giants
3487 in the 1997 National League Playoffs - no Braves fans allowed to use this
3488 code (just kidding :-).
3490 I realize that if I wanted to be true to the perl tradition, the only
3491 comment in this file would be something like:
3493 ...they shuffled back towards the rear of the line. 'No, not at the
3494 rear!' the slave-driver shouted. 'Three files up. And stay there...
3496 However, I really needed to violate that tradition just so I could keep
3497 track of what happens myself, not to mention some poor fool trying to
3498 understand this years from now :-).
3501 /* ********************************************************** Configuration */
3503 #ifndef QSORT_ORDER_GUESS
3504 #define QSORT_ORDER_GUESS 2 /* Select doubling version of the netBSD trick */
3507 /* QSORT_MAX_STACK is the largest number of partitions that can be stacked up for
3508 future processing - a good max upper bound is log base 2 of memory size
3509 (32 on 32 bit machines, 64 on 64 bit machines, etc). In reality can
3510 safely be smaller than that since the program is taking up some space and
3511 most operating systems only let you grab some subset of contiguous
3512 memory (not to mention that you are normally sorting data larger than
3513 1 byte element size :-).
3515 #ifndef QSORT_MAX_STACK
3516 #define QSORT_MAX_STACK 32
3519 /* QSORT_BREAK_EVEN is the size of the largest partition we should insertion sort.
3520 Anything bigger and we use qsort. If you make this too small, the qsort
3521 will probably break (or become less efficient), because it doesn't expect
3522 the middle element of a partition to be the same as the right or left -
3523 you have been warned).
3525 #ifndef QSORT_BREAK_EVEN
3526 #define QSORT_BREAK_EVEN 6
3529 /* ************************************************************* Data Types */
3531 /* hold left and right index values of a partition waiting to be sorted (the
3532 partition includes both left and right - right is NOT one past the end or
3533 anything like that).
3535 struct partition_stack_entry {
3538 #ifdef QSORT_ORDER_GUESS
3539 int qsort_break_even;
3543 /* ******************************************************* Shorthand Macros */
3545 /* Note that these macros will be used from inside the qsort function where
3546 we happen to know that the variable 'elt_size' contains the size of an
3547 array element and the variable 'temp' points to enough space to hold a
3548 temp element and the variable 'array' points to the array being sorted
3549 and 'compare' is the pointer to the compare routine.
3551 Also note that there are very many highly architecture specific ways
3552 these might be sped up, but this is simply the most generally portable
3553 code I could think of.
3556 /* Return < 0 == 0 or > 0 as the value of elt1 is < elt2, == elt2, > elt2
3558 #define qsort_cmp(elt1, elt2) \
3559 ((*compare)(aTHXo_ array[elt1], array[elt2]))
3561 #ifdef QSORT_ORDER_GUESS
3562 #define QSORT_NOTICE_SWAP swapped++;
3564 #define QSORT_NOTICE_SWAP
3567 /* swaps contents of array elements elt1, elt2.
3569 #define qsort_swap(elt1, elt2) \
3572 temp = array[elt1]; \
3573 array[elt1] = array[elt2]; \
3574 array[elt2] = temp; \
3577 /* rotate contents of elt1, elt2, elt3 such that elt1 gets elt2, elt2 gets
3578 elt3 and elt3 gets elt1.
3580 #define qsort_rotate(elt1, elt2, elt3) \
3583 temp = array[elt1]; \
3584 array[elt1] = array[elt2]; \
3585 array[elt2] = array[elt3]; \
3586 array[elt3] = temp; \
3589 /* ************************************************************ Debug stuff */
3596 return; /* good place to set a breakpoint */
3599 #define qsort_assert(t) (void)( (t) || (break_here(), 0) )
3602 doqsort_all_asserts(
3606 int (*compare)(const void * elt1, const void * elt2),
3607 int pc_left, int pc_right, int u_left, int u_right)
3611 qsort_assert(pc_left <= pc_right);
3612 qsort_assert(u_right < pc_left);
3613 qsort_assert(pc_right < u_left);
3614 for (i = u_right + 1; i < pc_left; ++i) {
3615 qsort_assert(qsort_cmp(i, pc_left) < 0);
3617 for (i = pc_left; i < pc_right; ++i) {
3618 qsort_assert(qsort_cmp(i, pc_right) == 0);
3620 for (i = pc_right + 1; i < u_left; ++i) {
3621 qsort_assert(qsort_cmp(pc_right, i) < 0);
3625 #define qsort_all_asserts(PC_LEFT, PC_RIGHT, U_LEFT, U_RIGHT) \
3626 doqsort_all_asserts(array, num_elts, elt_size, compare, \
3627 PC_LEFT, PC_RIGHT, U_LEFT, U_RIGHT)
3631 #define qsort_assert(t) ((void)0)
3633 #define qsort_all_asserts(PC_LEFT, PC_RIGHT, U_LEFT, U_RIGHT) ((void)0)
3637 /* ****************************************************************** qsort */
3640 S_qsortsv(pTHX_ SV ** array, size_t num_elts, SVCOMPARE_t compare)
3644 struct partition_stack_entry partition_stack[QSORT_MAX_STACK];
3645 int next_stack_entry = 0;
3649 #ifdef QSORT_ORDER_GUESS
3650 int qsort_break_even;
3654 /* Make sure we actually have work to do.
3656 if (num_elts <= 1) {
3660 /* Setup the initial partition definition and fall into the sorting loop
3663 part_right = (int)(num_elts - 1);
3664 #ifdef QSORT_ORDER_GUESS
3665 qsort_break_even = QSORT_BREAK_EVEN;
3667 #define qsort_break_even QSORT_BREAK_EVEN
3670 if ((part_right - part_left) >= qsort_break_even) {
3671 /* OK, this is gonna get hairy, so lets try to document all the
3672 concepts and abbreviations and variables and what they keep
3675 pc: pivot chunk - the set of array elements we accumulate in the
3676 middle of the partition, all equal in value to the original
3677 pivot element selected. The pc is defined by:
3679 pc_left - the leftmost array index of the pc
3680 pc_right - the rightmost array index of the pc
3682 we start with pc_left == pc_right and only one element
3683 in the pivot chunk (but it can grow during the scan).
3685 u: uncompared elements - the set of elements in the partition
3686 we have not yet compared to the pivot value. There are two
3687 uncompared sets during the scan - one to the left of the pc
3688 and one to the right.
3690 u_right - the rightmost index of the left side's uncompared set
3691 u_left - the leftmost index of the right side's uncompared set
3693 The leftmost index of the left sides's uncompared set
3694 doesn't need its own variable because it is always defined
3695 by the leftmost edge of the whole partition (part_left). The
3696 same goes for the rightmost edge of the right partition
3699 We know there are no uncompared elements on the left once we
3700 get u_right < part_left and no uncompared elements on the
3701 right once u_left > part_right. When both these conditions
3702 are met, we have completed the scan of the partition.
3704 Any elements which are between the pivot chunk and the
3705 uncompared elements should be less than the pivot value on
3706 the left side and greater than the pivot value on the right
3707 side (in fact, the goal of the whole algorithm is to arrange
3708 for that to be true and make the groups of less-than and
3709 greater-then elements into new partitions to sort again).
3711 As you marvel at the complexity of the code and wonder why it
3712 has to be so confusing. Consider some of the things this level
3713 of confusion brings:
3715 Once I do a compare, I squeeze every ounce of juice out of it. I
3716 never do compare calls I don't have to do, and I certainly never
3719 I also never swap any elements unless I can prove there is a
3720 good reason. Many sort algorithms will swap a known value with
3721 an uncompared value just to get things in the right place (or
3722 avoid complexity :-), but that uncompared value, once it gets
3723 compared, may then have to be swapped again. A lot of the
3724 complexity of this code is due to the fact that it never swaps
3725 anything except compared values, and it only swaps them when the
3726 compare shows they are out of position.
3728 int pc_left, pc_right;
3729 int u_right, u_left;
3733 pc_left = ((part_left + part_right) / 2);
3735 u_right = pc_left - 1;
3736 u_left = pc_right + 1;
3738 /* Qsort works best when the pivot value is also the median value
3739 in the partition (unfortunately you can't find the median value
3740 without first sorting :-), so to give the algorithm a helping
3741 hand, we pick 3 elements and sort them and use the median value
3742 of that tiny set as the pivot value.
3744 Some versions of qsort like to use the left middle and right as
3745 the 3 elements to sort so they can insure the ends of the
3746 partition will contain values which will stop the scan in the
3747 compare loop, but when you have to call an arbitrarily complex
3748 routine to do a compare, its really better to just keep track of
3749 array index values to know when you hit the edge of the
3750 partition and avoid the extra compare. An even better reason to
3751 avoid using a compare call is the fact that you can drop off the
3752 edge of the array if someone foolishly provides you with an
3753 unstable compare function that doesn't always provide consistent
3756 So, since it is simpler for us to compare the three adjacent
3757 elements in the middle of the partition, those are the ones we
3758 pick here (conveniently pointed at by u_right, pc_left, and
3759 u_left). The values of the left, center, and right elements
3760 are refered to as l c and r in the following comments.
3763 #ifdef QSORT_ORDER_GUESS
3766 s = qsort_cmp(u_right, pc_left);
3769 s = qsort_cmp(pc_left, u_left);
3770 /* if l < c, c < r - already in order - nothing to do */
3772 /* l < c, c == r - already in order, pc grows */
3774 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3776 /* l < c, c > r - need to know more */
3777 s = qsort_cmp(u_right, u_left);
3779 /* l < c, c > r, l < r - swap c & r to get ordered */
3780 qsort_swap(pc_left, u_left);
3781 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3782 } else if (s == 0) {
3783 /* l < c, c > r, l == r - swap c&r, grow pc */
3784 qsort_swap(pc_left, u_left);
3786 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3788 /* l < c, c > r, l > r - make lcr into rlc to get ordered */
3789 qsort_rotate(pc_left, u_right, u_left);
3790 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3793 } else if (s == 0) {
3795 s = qsort_cmp(pc_left, u_left);
3797 /* l == c, c < r - already in order, grow pc */
3799 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3800 } else if (s == 0) {
3801 /* l == c, c == r - already in order, grow pc both ways */
3804 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3806 /* l == c, c > r - swap l & r, grow pc */
3807 qsort_swap(u_right, u_left);
3809 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3813 s = qsort_cmp(pc_left, u_left);
3815 /* l > c, c < r - need to know more */
3816 s = qsort_cmp(u_right, u_left);
3818 /* l > c, c < r, l < r - swap l & c to get ordered */
3819 qsort_swap(u_right, pc_left);
3820 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3821 } else if (s == 0) {
3822 /* l > c, c < r, l == r - swap l & c, grow pc */
3823 qsort_swap(u_right, pc_left);
3825 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3827 /* l > c, c < r, l > r - rotate lcr into crl to order */
3828 qsort_rotate(u_right, pc_left, u_left);
3829 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3831 } else if (s == 0) {
3832 /* l > c, c == r - swap ends, grow pc */
3833 qsort_swap(u_right, u_left);
3835 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3837 /* l > c, c > r - swap ends to get in order */
3838 qsort_swap(u_right, u_left);
3839 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3842 /* We now know the 3 middle elements have been compared and
3843 arranged in the desired order, so we can shrink the uncompared
3848 qsort_all_asserts(pc_left, pc_right, u_left, u_right);
3850 /* The above massive nested if was the simple part :-). We now have
3851 the middle 3 elements ordered and we need to scan through the
3852 uncompared sets on either side, swapping elements that are on
3853 the wrong side or simply shuffling equal elements around to get
3854 all equal elements into the pivot chunk.
3858 int still_work_on_left;
3859 int still_work_on_right;
3861 /* Scan the uncompared values on the left. If I find a value
3862 equal to the pivot value, move it over so it is adjacent to
3863 the pivot chunk and expand the pivot chunk. If I find a value
3864 less than the pivot value, then just leave it - its already
3865 on the correct side of the partition. If I find a greater
3866 value, then stop the scan.
3868 while (still_work_on_left = (u_right >= part_left)) {
3869 s = qsort_cmp(u_right, pc_left);
3872 } else if (s == 0) {
3874 if (pc_left != u_right) {
3875 qsort_swap(u_right, pc_left);
3881 qsort_assert(u_right < pc_left);
3882 qsort_assert(pc_left <= pc_right);
3883 qsort_assert(qsort_cmp(u_right + 1, pc_left) <= 0);
3884 qsort_assert(qsort_cmp(pc_left, pc_right) == 0);
3887 /* Do a mirror image scan of uncompared values on the right
3889 while (still_work_on_right = (u_left <= part_right)) {
3890 s = qsort_cmp(pc_right, u_left);
3893 } else if (s == 0) {
3895 if (pc_right != u_left) {
3896 qsort_swap(pc_right, u_left);
3902 qsort_assert(u_left > pc_right);
3903 qsort_assert(pc_left <= pc_right);
3904 qsort_assert(qsort_cmp(pc_right, u_left - 1) <= 0);
3905 qsort_assert(qsort_cmp(pc_left, pc_right) == 0);
3908 if (still_work_on_left) {
3909 /* I know I have a value on the left side which needs to be
3910 on the right side, but I need to know more to decide
3911 exactly the best thing to do with it.
3913 if (still_work_on_right) {
3914 /* I know I have values on both side which are out of
3915 position. This is a big win because I kill two birds
3916 with one swap (so to speak). I can advance the
3917 uncompared pointers on both sides after swapping both
3918 of them into the right place.
3920 qsort_swap(u_right, u_left);
3923 qsort_all_asserts(pc_left, pc_right, u_left, u_right);
3925 /* I have an out of position value on the left, but the
3926 right is fully scanned, so I "slide" the pivot chunk
3927 and any less-than values left one to make room for the
3928 greater value over on the right. If the out of position
3929 value is immediately adjacent to the pivot chunk (there
3930 are no less-than values), I can do that with a swap,
3931 otherwise, I have to rotate one of the less than values
3932 into the former position of the out of position value
3933 and the right end of the pivot chunk into the left end
3937 if (pc_left == u_right) {
3938 qsort_swap(u_right, pc_right);
3939 qsort_all_asserts(pc_left, pc_right-1, u_left, u_right-1);
3941 qsort_rotate(u_right, pc_left, pc_right);
3942 qsort_all_asserts(pc_left, pc_right-1, u_left, u_right-1);
3947 } else if (still_work_on_right) {
3948 /* Mirror image of complex case above: I have an out of
3949 position value on the right, but the left is fully
3950 scanned, so I need to shuffle things around to make room
3951 for the right value on the left.
3954 if (pc_right == u_left) {
3955 qsort_swap(u_left, pc_left);
3956 qsort_all_asserts(pc_left+1, pc_right, u_left+1, u_right);
3958 qsort_rotate(pc_right, pc_left, u_left);
3959 qsort_all_asserts(pc_left+1, pc_right, u_left+1, u_right);
3964 /* No more scanning required on either side of partition,
3965 break out of loop and figure out next set of partitions
3971 /* The elements in the pivot chunk are now in the right place. They
3972 will never move or be compared again. All I have to do is decide
3973 what to do with the stuff to the left and right of the pivot
3976 Notes on the QSORT_ORDER_GUESS ifdef code:
3978 1. If I just built these partitions without swapping any (or
3979 very many) elements, there is a chance that the elements are
3980 already ordered properly (being properly ordered will
3981 certainly result in no swapping, but the converse can't be
3984 2. A (properly written) insertion sort will run faster on
3985 already ordered data than qsort will.
3987 3. Perhaps there is some way to make a good guess about
3988 switching to an insertion sort earlier than partition size 6
3989 (for instance - we could save the partition size on the stack
3990 and increase the size each time we find we didn't swap, thus
3991 switching to insertion sort earlier for partitions with a
3992 history of not swapping).
3994 4. Naturally, if I just switch right away, it will make
3995 artificial benchmarks with pure ascending (or descending)
3996 data look really good, but is that a good reason in general?
4000 #ifdef QSORT_ORDER_GUESS
4002 #if QSORT_ORDER_GUESS == 1
4003 qsort_break_even = (part_right - part_left) + 1;
4005 #if QSORT_ORDER_GUESS == 2
4006 qsort_break_even *= 2;
4008 #if QSORT_ORDER_GUESS == 3
4009 int prev_break = qsort_break_even;
4010 qsort_break_even *= qsort_break_even;
4011 if (qsort_break_even < prev_break) {
4012 qsort_break_even = (part_right - part_left) + 1;
4016 qsort_break_even = QSORT_BREAK_EVEN;
4020 if (part_left < pc_left) {
4021 /* There are elements on the left which need more processing.
4022 Check the right as well before deciding what to do.
4024 if (pc_right < part_right) {
4025 /* We have two partitions to be sorted. Stack the biggest one
4026 and process the smallest one on the next iteration. This
4027 minimizes the stack height by insuring that any additional
4028 stack entries must come from the smallest partition which
4029 (because it is smallest) will have the fewest
4030 opportunities to generate additional stack entries.
4032 if ((part_right - pc_right) > (pc_left - part_left)) {
4033 /* stack the right partition, process the left */
4034 partition_stack[next_stack_entry].left = pc_right + 1;
4035 partition_stack[next_stack_entry].right = part_right;
4036 #ifdef QSORT_ORDER_GUESS
4037 partition_stack[next_stack_entry].qsort_break_even = qsort_break_even;
4039 part_right = pc_left - 1;
4041 /* stack the left partition, process the right */
4042 partition_stack[next_stack_entry].left = part_left;
4043 partition_stack[next_stack_entry].right = pc_left - 1;
4044 #ifdef QSORT_ORDER_GUESS
4045 partition_stack[next_stack_entry].qsort_break_even = qsort_break_even;
4047 part_left = pc_right + 1;
4049 qsort_assert(next_stack_entry < QSORT_MAX_STACK);
4052 /* The elements on the left are the only remaining elements
4053 that need sorting, arrange for them to be processed as the
4056 part_right = pc_left - 1;
4058 } else if (pc_right < part_right) {
4059 /* There is only one chunk on the right to be sorted, make it
4060 the new partition and loop back around.
4062 part_left = pc_right + 1;
4064 /* This whole partition wound up in the pivot chunk, so
4065 we need to get a new partition off the stack.
4067 if (next_stack_entry == 0) {
4068 /* the stack is empty - we are done */
4072 part_left = partition_stack[next_stack_entry].left;
4073 part_right = partition_stack[next_stack_entry].right;
4074 #ifdef QSORT_ORDER_GUESS
4075 qsort_break_even = partition_stack[next_stack_entry].qsort_break_even;
4079 /* This partition is too small to fool with qsort complexity, just
4080 do an ordinary insertion sort to minimize overhead.
4083 /* Assume 1st element is in right place already, and start checking
4084 at 2nd element to see where it should be inserted.
4086 for (i = part_left + 1; i <= part_right; ++i) {
4088 /* Scan (backwards - just in case 'i' is already in right place)
4089 through the elements already sorted to see if the ith element
4090 belongs ahead of one of them.
4092 for (j = i - 1; j >= part_left; --j) {
4093 if (qsort_cmp(i, j) >= 0) {
4094 /* i belongs right after j
4101 /* Looks like we really need to move some things
4105 for (k = i - 1; k >= j; --k)
4106 array[k + 1] = array[k];
4111 /* That partition is now sorted, grab the next one, or get out
4112 of the loop if there aren't any more.
4115 if (next_stack_entry == 0) {
4116 /* the stack is empty - we are done */
4120 part_left = partition_stack[next_stack_entry].left;
4121 part_right = partition_stack[next_stack_entry].right;
4122 #ifdef QSORT_ORDER_GUESS
4123 qsort_break_even = partition_stack[next_stack_entry].qsort_break_even;
4128 /* Believe it or not, the array is sorted at this point! */
4141 sortcv(pTHXo_ SV *a, SV *b)
4144 I32 oldsaveix = PL_savestack_ix;
4145 I32 oldscopeix = PL_scopestack_ix;
4147 GvSV(PL_firstgv) = a;
4148 GvSV(PL_secondgv) = b;
4149 PL_stack_sp = PL_stack_base;
4152 if (PL_stack_sp != PL_stack_base + 1)
4153 Perl_croak(aTHX_ "Sort subroutine didn't return single value");
4154 if (!SvNIOKp(*PL_stack_sp))
4155 Perl_croak(aTHX_ "Sort subroutine didn't return a numeric value");
4156 result = SvIV(*PL_stack_sp);
4157 while (PL_scopestack_ix > oldscopeix) {
4160 leave_scope(oldsaveix);
4166 sv_ncmp(pTHXo_ SV *a, SV *b)
4170 return nv1 < nv2 ? -1 : nv1 > nv2 ? 1 : 0;
4174 sv_i_ncmp(pTHXo_ SV *a, SV *b)
4178 return iv1 < iv2 ? -1 : iv1 > iv2 ? 1 : 0;
4180 #define tryCALL_AMAGICbin(left,right,meth,svp) STMT_START { \
4182 if (PL_amagic_generation) { \
4183 if (SvAMAGIC(left)||SvAMAGIC(right))\
4184 *svp = amagic_call(left, \
4192 amagic_ncmp(pTHXo_ register SV *a, register SV *b)
4195 tryCALL_AMAGICbin(a,b,ncmp,&tmpsv);
4200 I32 i = SvIVX(tmpsv);
4210 return sv_ncmp(aTHXo_ a, b);
4214 amagic_i_ncmp(pTHXo_ register SV *a, register SV *b)
4217 tryCALL_AMAGICbin(a,b,ncmp,&tmpsv);
4222 I32 i = SvIVX(tmpsv);
4232 return sv_i_ncmp(aTHXo_ a, b);
4236 amagic_cmp(pTHXo_ register SV *str1, register SV *str2)
4239 tryCALL_AMAGICbin(str1,str2,scmp,&tmpsv);
4244 I32 i = SvIVX(tmpsv);
4254 return sv_cmp(str1, str2);
4258 amagic_cmp_locale(pTHXo_ register SV *str1, register SV *str2)
4261 tryCALL_AMAGICbin(str1,str2,scmp,&tmpsv);
4266 I32 i = SvIVX(tmpsv);
4276 return sv_cmp_locale(str1, str2);
4280 run_user_filter(pTHXo_ int idx, SV *buf_sv, int maxlen)
4282 SV *datasv = FILTER_DATA(idx);
4283 int filter_has_file = IoLINES(datasv);
4284 GV *filter_child_proc = (GV *)IoFMT_GV(datasv);
4285 SV *filter_state = (SV *)IoTOP_GV(datasv);
4286 SV *filter_sub = (SV *)IoBOTTOM_GV(datasv);
4289 /* I was having segfault trouble under Linux 2.2.5 after a
4290 parse error occured. (Had to hack around it with a test
4291 for PL_error_count == 0.) Solaris doesn't segfault --
4292 not sure where the trouble is yet. XXX */
4294 if (filter_has_file) {
4295 len = FILTER_READ(idx+1, buf_sv, maxlen);
4298 if (filter_sub && len >= 0) {
4309 PUSHs(sv_2mortal(newSViv(maxlen)));
4311 PUSHs(filter_state);
4314 count = call_sv(filter_sub, G_SCALAR);
4330 IoLINES(datasv) = 0;
4331 if (filter_child_proc) {
4332 SvREFCNT_dec(filter_child_proc);
4333 IoFMT_GV(datasv) = Nullgv;
4336 SvREFCNT_dec(filter_state);
4337 IoTOP_GV(datasv) = Nullgv;
4340 SvREFCNT_dec(filter_sub);
4341 IoBOTTOM_GV(datasv) = Nullgv;
4343 filter_del(run_user_filter);
4352 sv_cmp_locale_static(pTHXo_ register SV *str1, register SV *str2)
4354 return sv_cmp_locale(str1, str2);
4358 sv_cmp_static(pTHXo_ register SV *str1, register SV *str2)
4360 return sv_cmp(str1, str2);
4363 #endif /* PERL_OBJECT */