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 = CopSTASH(PL_curcop);
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 = CopSTASH(PL_curcop);
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 hv = CopSTASH(cx->blk_oldcop);
1432 if (GIMME != G_ARRAY) {
1434 PUSHs(&PL_sv_undef);
1437 sv_setpv(TARG, HvNAME(hv));
1444 PUSHs(&PL_sv_undef);
1446 PUSHs(sv_2mortal(newSVpv(HvNAME(hv), 0)));
1447 PUSHs(sv_2mortal(newSVsv(CopFILESV(cx->blk_oldcop))));
1448 PUSHs(sv_2mortal(newSViv((I32)CopLINE(cx->blk_oldcop))));
1451 if (CxTYPE(cx) == CXt_SUB) { /* So is ccstack[dbcxix]. */
1453 gv_efullname3(sv, CvGV(ccstack[cxix].blk_sub.cv), Nullch);
1454 PUSHs(sv_2mortal(sv));
1455 PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
1458 PUSHs(sv_2mortal(newSVpvn("(eval)",6)));
1459 PUSHs(sv_2mortal(newSViv(0)));
1461 gimme = (I32)cx->blk_gimme;
1462 if (gimme == G_VOID)
1463 PUSHs(&PL_sv_undef);
1465 PUSHs(sv_2mortal(newSViv(gimme & G_ARRAY)));
1466 if (CxTYPE(cx) == CXt_EVAL) {
1467 if (cx->blk_eval.old_op_type == OP_ENTEREVAL) {
1468 PUSHs(cx->blk_eval.cur_text);
1471 else if (cx->blk_eval.old_name) { /* Try blocks have old_name == 0. */
1472 /* Require, put the name. */
1473 PUSHs(sv_2mortal(newSVpv(cx->blk_eval.old_name, 0)));
1478 PUSHs(&PL_sv_undef);
1479 PUSHs(&PL_sv_undef);
1481 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs
1482 && CopSTASH(PL_curcop) == PL_debstash)
1484 AV *ary = cx->blk_sub.argarray;
1485 int off = AvARRAY(ary) - AvALLOC(ary);
1489 PL_dbargs = GvAV(gv_AVadd(tmpgv = gv_fetchpv("DB::args", TRUE,
1492 AvREAL_off(PL_dbargs); /* XXX Should be REIFY */
1495 if (AvMAX(PL_dbargs) < AvFILLp(ary) + off)
1496 av_extend(PL_dbargs, AvFILLp(ary) + off);
1497 Copy(AvALLOC(ary), AvARRAY(PL_dbargs), AvFILLp(ary) + 1 + off, SV*);
1498 AvFILLp(PL_dbargs) = AvFILLp(ary) + off;
1500 /* XXX only hints propagated via op_private are currently
1501 * visible (others are not easily accessible, since they
1502 * use the global PL_hints) */
1503 PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->op_private &
1504 HINT_PRIVATE_MASK)));
1518 sv_reset(tmps, CopSTASH(PL_curcop));
1530 PL_curcop = (COP*)PL_op;
1531 TAINT_NOT; /* Each statement is presumed innocent */
1532 PL_stack_sp = PL_stack_base + cxstack[cxstack_ix].blk_oldsp;
1535 if (PL_op->op_private || SvIV(PL_DBsingle) || SvIV(PL_DBsignal) || SvIV(PL_DBtrace))
1539 register PERL_CONTEXT *cx;
1540 I32 gimme = G_ARRAY;
1547 DIE(aTHX_ "No DB::DB routine defined");
1549 if (CvDEPTH(cv) >= 1 && !(PL_debug & (1<<30))) /* don't do recursive DB::DB call */
1561 push_return(PL_op->op_next);
1562 PUSHBLOCK(cx, CXt_SUB, SP);
1565 (void)SvREFCNT_inc(cv);
1566 SAVESPTR(PL_curpad);
1567 PL_curpad = AvARRAY((AV*)*av_fetch(CvPADLIST(cv),1,FALSE));
1568 RETURNOP(CvSTART(cv));
1582 register PERL_CONTEXT *cx;
1583 I32 gimme = GIMME_V;
1590 if (PL_op->op_flags & OPf_SPECIAL) {
1592 svp = &THREADSV(PL_op->op_targ); /* per-thread variable */
1593 SAVEGENERICSV(*svp);
1597 #endif /* USE_THREADS */
1598 if (PL_op->op_targ) {
1599 svp = &PL_curpad[PL_op->op_targ]; /* "my" variable */
1603 svp = &GvSV((GV*)POPs); /* symbol table variable */
1604 SAVEGENERICSV(*svp);
1610 PUSHBLOCK(cx, CXt_LOOP, SP);
1611 PUSHLOOP(cx, svp, MARK);
1612 if (PL_op->op_flags & OPf_STACKED) {
1613 cx->blk_loop.iterary = (AV*)SvREFCNT_inc(POPs);
1614 if (SvTYPE(cx->blk_loop.iterary) != SVt_PVAV) {
1616 if (SvNIOKp(sv) || !SvPOKp(sv) ||
1617 (looks_like_number(sv) && *SvPVX(sv) != '0')) {
1618 if (SvNV(sv) < IV_MIN ||
1619 SvNV((SV*)cx->blk_loop.iterary) >= IV_MAX)
1620 DIE(aTHX_ "Range iterator outside integer range");
1621 cx->blk_loop.iterix = SvIV(sv);
1622 cx->blk_loop.itermax = SvIV((SV*)cx->blk_loop.iterary);
1625 cx->blk_loop.iterlval = newSVsv(sv);
1629 cx->blk_loop.iterary = PL_curstack;
1630 AvFILLp(PL_curstack) = SP - PL_stack_base;
1631 cx->blk_loop.iterix = MARK - PL_stack_base;
1640 register PERL_CONTEXT *cx;
1641 I32 gimme = GIMME_V;
1647 PUSHBLOCK(cx, CXt_LOOP, SP);
1648 PUSHLOOP(cx, 0, SP);
1656 register PERL_CONTEXT *cx;
1664 newsp = PL_stack_base + cx->blk_loop.resetsp;
1667 if (gimme == G_VOID)
1669 else if (gimme == G_SCALAR) {
1671 *++newsp = sv_mortalcopy(*SP);
1673 *++newsp = &PL_sv_undef;
1677 *++newsp = sv_mortalcopy(*++mark);
1678 TAINT_NOT; /* Each item is independent */
1684 POPLOOP(cx); /* Stack values are safe: release loop vars ... */
1685 PL_curpm = newpm; /* ... and pop $1 et al */
1697 register PERL_CONTEXT *cx;
1698 bool popsub2 = FALSE;
1705 if (PL_curstackinfo->si_type == PERLSI_SORT) {
1706 if (cxstack_ix == PL_sortcxix || dopoptosub(cxstack_ix) <= PL_sortcxix) {
1707 if (cxstack_ix > PL_sortcxix)
1708 dounwind(PL_sortcxix);
1709 AvARRAY(PL_curstack)[1] = *SP;
1710 PL_stack_sp = PL_stack_base + 1;
1715 cxix = dopoptosub(cxstack_ix);
1717 DIE(aTHX_ "Can't return outside a subroutine");
1718 if (cxix < cxstack_ix)
1722 switch (CxTYPE(cx)) {
1728 if (AvFILLp(PL_comppad_name) >= 0)
1731 if (optype == OP_REQUIRE &&
1732 (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
1734 /* Unassume the success we assumed earlier. */
1735 char *name = cx->blk_eval.old_name;
1736 (void)hv_delete(GvHVn(PL_incgv), name, strlen(name), G_DISCARD);
1737 DIE(aTHX_ "%s did not return a true value", name);
1741 DIE(aTHX_ "panic: return");
1745 if (gimme == G_SCALAR) {
1748 if (cx->blk_sub.cv && CvDEPTH(cx->blk_sub.cv) > 1) {
1750 *++newsp = SvREFCNT_inc(*SP);
1755 *++newsp = sv_mortalcopy(*SP);
1758 *++newsp = (SvTEMP(*SP)) ? *SP : sv_mortalcopy(*SP);
1760 *++newsp = sv_mortalcopy(*SP);
1762 *++newsp = &PL_sv_undef;
1764 else if (gimme == G_ARRAY) {
1765 while (++MARK <= SP) {
1766 *++newsp = (popsub2 && SvTEMP(*MARK))
1767 ? *MARK : sv_mortalcopy(*MARK);
1768 TAINT_NOT; /* Each item is independent */
1771 PL_stack_sp = newsp;
1773 /* Stack values are safe: */
1775 POPSUB(cx,sv); /* release CV and @_ ... */
1779 PL_curpm = newpm; /* ... and pop $1 et al */
1783 return pop_return();
1790 register PERL_CONTEXT *cx;
1800 if (PL_op->op_flags & OPf_SPECIAL) {
1801 cxix = dopoptoloop(cxstack_ix);
1803 DIE(aTHX_ "Can't \"last\" outside a block");
1806 cxix = dopoptolabel(cPVOP->op_pv);
1808 DIE(aTHX_ "Label not found for \"last %s\"", cPVOP->op_pv);
1810 if (cxix < cxstack_ix)
1815 switch (CxTYPE(cx)) {
1818 newsp = PL_stack_base + cx->blk_loop.resetsp;
1819 nextop = cx->blk_loop.last_op->op_next;
1823 nextop = pop_return();
1827 nextop = pop_return();
1830 DIE(aTHX_ "panic: last");
1834 if (gimme == G_SCALAR) {
1836 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*SP))
1837 ? *SP : sv_mortalcopy(*SP);
1839 *++newsp = &PL_sv_undef;
1841 else if (gimme == G_ARRAY) {
1842 while (++MARK <= SP) {
1843 *++newsp = ((pop2 == CXt_SUB) && SvTEMP(*MARK))
1844 ? *MARK : sv_mortalcopy(*MARK);
1845 TAINT_NOT; /* Each item is independent */
1851 /* Stack values are safe: */
1854 POPLOOP(cx); /* release loop vars ... */
1858 POPSUB(cx,sv); /* release CV and @_ ... */
1861 PL_curpm = newpm; /* ... and pop $1 et al */
1871 register PERL_CONTEXT *cx;
1874 if (PL_op->op_flags & OPf_SPECIAL) {
1875 cxix = dopoptoloop(cxstack_ix);
1877 DIE(aTHX_ "Can't \"next\" outside a block");
1880 cxix = dopoptolabel(cPVOP->op_pv);
1882 DIE(aTHX_ "Label not found for \"next %s\"", cPVOP->op_pv);
1884 if (cxix < cxstack_ix)
1888 oldsave = PL_scopestack[PL_scopestack_ix - 1];
1889 LEAVE_SCOPE(oldsave);
1890 return cx->blk_loop.next_op;
1896 register PERL_CONTEXT *cx;
1899 if (PL_op->op_flags & OPf_SPECIAL) {
1900 cxix = dopoptoloop(cxstack_ix);
1902 DIE(aTHX_ "Can't \"redo\" outside a block");
1905 cxix = dopoptolabel(cPVOP->op_pv);
1907 DIE(aTHX_ "Label not found for \"redo %s\"", cPVOP->op_pv);
1909 if (cxix < cxstack_ix)
1913 oldsave = PL_scopestack[PL_scopestack_ix - 1];
1914 LEAVE_SCOPE(oldsave);
1915 return cx->blk_loop.redo_op;
1919 S_dofindlabel(pTHX_ OP *o, char *label, OP **opstack, OP **oplimit)
1923 static char too_deep[] = "Target of goto is too deeply nested";
1926 Perl_croak(aTHX_ too_deep);
1927 if (o->op_type == OP_LEAVE ||
1928 o->op_type == OP_SCOPE ||
1929 o->op_type == OP_LEAVELOOP ||
1930 o->op_type == OP_LEAVETRY)
1932 *ops++ = cUNOPo->op_first;
1934 Perl_croak(aTHX_ too_deep);
1937 if (o->op_flags & OPf_KIDS) {
1939 /* First try all the kids at this level, since that's likeliest. */
1940 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
1941 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
1942 kCOP->cop_label && strEQ(kCOP->cop_label, label))
1945 for (kid = cUNOPo->op_first; kid; kid = kid->op_sibling) {
1946 if (kid == PL_lastgotoprobe)
1948 if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
1950 (ops[-1]->op_type != OP_NEXTSTATE &&
1951 ops[-1]->op_type != OP_DBSTATE)))
1953 if (o = dofindlabel(kid, label, ops, oplimit))
1972 register PERL_CONTEXT *cx;
1973 #define GOTO_DEPTH 64
1974 OP *enterops[GOTO_DEPTH];
1976 int do_dump = (PL_op->op_type == OP_DUMP);
1977 static char must_have_label[] = "goto must have label";
1980 if (PL_op->op_flags & OPf_STACKED) {
1984 /* This egregious kludge implements goto &subroutine */
1985 if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
1987 register PERL_CONTEXT *cx;
1988 CV* cv = (CV*)SvRV(sv);
1994 if (!CvROOT(cv) && !CvXSUB(cv)) {
1999 /* autoloaded stub? */
2000 if (cv != GvCV(gv) && (cv = GvCV(gv)))
2002 autogv = gv_autoload4(GvSTASH(gv), GvNAME(gv),
2003 GvNAMELEN(gv), FALSE);
2004 if (autogv && (cv = GvCV(autogv)))
2006 tmpstr = sv_newmortal();
2007 gv_efullname3(tmpstr, gv, Nullch);
2008 DIE(aTHX_ "Goto undefined subroutine &%s",SvPVX(tmpstr));
2010 DIE(aTHX_ "Goto undefined subroutine");
2013 /* First do some returnish stuff. */
2014 cxix = dopoptosub(cxstack_ix);
2016 DIE(aTHX_ "Can't goto subroutine outside a subroutine");
2017 if (cxix < cxstack_ix)
2020 if (CxTYPE(cx) == CXt_EVAL && cx->blk_eval.old_op_type == OP_ENTEREVAL)
2021 DIE(aTHX_ "Can't goto subroutine from an eval-string");
2023 if (CxTYPE(cx) == CXt_SUB && cx->blk_sub.hasargs) {
2024 /* put @_ back onto stack */
2025 AV* av = cx->blk_sub.argarray;
2027 items = AvFILLp(av) + 1;
2029 EXTEND(PL_stack_sp, items); /* @_ could have been extended. */
2030 Copy(AvARRAY(av), PL_stack_sp, items, SV*);
2031 PL_stack_sp += items;
2033 SvREFCNT_dec(GvAV(PL_defgv));
2034 GvAV(PL_defgv) = cx->blk_sub.savearray;
2035 #endif /* USE_THREADS */
2036 /* abandon @_ if it got reified */
2038 (void)sv_2mortal((SV*)av); /* delay until return */
2040 av_extend(av, items-1);
2041 AvFLAGS(av) = AVf_REIFY;
2042 PL_curpad[0] = (SV*)(cx->blk_sub.argarray = av);
2045 else if (CvXSUB(cv)) { /* put GvAV(defgv) back onto stack */
2049 av = (AV*)PL_curpad[0];
2051 av = GvAV(PL_defgv);
2053 items = AvFILLp(av) + 1;
2055 EXTEND(PL_stack_sp, items); /* @_ could have been extended. */
2056 Copy(AvARRAY(av), PL_stack_sp, items, SV*);
2057 PL_stack_sp += items;
2059 if (CxTYPE(cx) == CXt_SUB &&
2060 !(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
2061 SvREFCNT_dec(cx->blk_sub.cv);
2062 oldsave = PL_scopestack[PL_scopestack_ix - 1];
2063 LEAVE_SCOPE(oldsave);
2065 /* Now do some callish stuff. */
2068 #ifdef PERL_XSUB_OLDSTYLE
2069 if (CvOLDSTYLE(cv)) {
2070 I32 (*fp3)(int,int,int);
2075 fp3 = (I32(*)(int,int,int)))CvXSUB(cv;
2076 items = (*fp3)(CvXSUBANY(cv).any_i32,
2077 mark - PL_stack_base + 1,
2079 SP = PL_stack_base + items;
2082 #endif /* PERL_XSUB_OLDSTYLE */
2087 PL_stack_sp--; /* There is no cv arg. */
2088 /* Push a mark for the start of arglist */
2090 (void)(*CvXSUB(cv))(aTHXo_ cv);
2091 /* Pop the current context like a decent sub should */
2092 POPBLOCK(cx, PL_curpm);
2093 /* Do _not_ use PUTBACK, keep the XSUB's return stack! */
2096 return pop_return();
2099 AV* padlist = CvPADLIST(cv);
2100 SV** svp = AvARRAY(padlist);
2101 if (CxTYPE(cx) == CXt_EVAL) {
2102 PL_in_eval = cx->blk_eval.old_in_eval;
2103 PL_eval_root = cx->blk_eval.old_eval_root;
2104 cx->cx_type = CXt_SUB;
2105 cx->blk_sub.hasargs = 0;
2107 cx->blk_sub.cv = cv;
2108 cx->blk_sub.olddepth = CvDEPTH(cv);
2110 if (CvDEPTH(cv) < 2)
2111 (void)SvREFCNT_inc(cv);
2112 else { /* save temporaries on recursion? */
2113 if (CvDEPTH(cv) == 100 && ckWARN(WARN_RECURSION))
2114 sub_crush_depth(cv);
2115 if (CvDEPTH(cv) > AvFILLp(padlist)) {
2116 AV *newpad = newAV();
2117 SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
2118 I32 ix = AvFILLp((AV*)svp[1]);
2119 svp = AvARRAY(svp[0]);
2120 for ( ;ix > 0; ix--) {
2121 if (svp[ix] != &PL_sv_undef) {
2122 char *name = SvPVX(svp[ix]);
2123 if ((SvFLAGS(svp[ix]) & SVf_FAKE)
2126 /* outer lexical or anon code */
2127 av_store(newpad, ix,
2128 SvREFCNT_inc(oldpad[ix]) );
2130 else { /* our own lexical */
2132 av_store(newpad, ix, sv = (SV*)newAV());
2133 else if (*name == '%')
2134 av_store(newpad, ix, sv = (SV*)newHV());
2136 av_store(newpad, ix, sv = NEWSV(0,0));
2140 else if (IS_PADGV(oldpad[ix])) {
2141 av_store(newpad, ix, sv = SvREFCNT_inc(oldpad[ix]));
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 SAVECOPSTASH(&PL_compiling);
2491 CopSTASH_set(&PL_compiling, PL_curstash);
2493 SAVECOPFILE(&PL_compiling);
2494 SAVECOPLINE(&PL_compiling);
2495 sprintf(tmpbuf, "_<(%.10s_eval %lu)", code, (unsigned long)++PL_evalseq);
2496 CopFILE_set(&PL_compiling, tmpbuf+2);
2497 CopLINE_set(&PL_compiling, 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, Nullgv);
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 = CopSTASH(PL_curcop);
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 CopLINE_set(&PL_compiling, 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*)CopFILEGV(&PL_compiling));
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 if (PERL_FILE_IS_ABSOLUTE(name)
2785 || (*name == '.' && (name[1] == '/' ||
2786 (name[1] == '.' && name[2] == '/'))))
2789 tryrsfp = doopen_pmc(name,PERL_SCRIPT_MODE);
2792 AV *ar = GvAVn(PL_incgv);
2796 if ((unixname = tounixspec(name, Nullch)) != Nullch)
2799 namesv = NEWSV(806, 0);
2800 for (i = 0; i <= AvFILL(ar); i++) {
2801 SV *dirsv = *av_fetch(ar, i, TRUE);
2807 if (SvTYPE(SvRV(loader)) == SVt_PVAV) {
2808 loader = *av_fetch((AV *)SvRV(loader), 0, TRUE);
2811 Perl_sv_setpvf(aTHX_ namesv, "/loader/0x%"UVxf"/%s",
2812 PTR2UV(SvANY(loader)), name);
2813 tryname = SvPVX(namesv);
2824 count = call_sv(loader, G_ARRAY);
2834 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVGV) {
2838 if (SvTYPE(arg) == SVt_PVGV) {
2839 IO *io = GvIO((GV *)arg);
2844 tryrsfp = IoIFP(io);
2845 if (IoTYPE(io) == '|') {
2846 /* reading from a child process doesn't
2847 nest -- when returning from reading
2848 the inner module, the outer one is
2849 unreadable (closed?) I've tried to
2850 save the gv to manage the lifespan of
2851 the pipe, but this didn't help. XXX */
2852 filter_child_proc = (GV *)arg;
2853 (void)SvREFCNT_inc(filter_child_proc);
2856 if (IoOFP(io) && IoOFP(io) != IoIFP(io)) {
2857 PerlIO_close(IoOFP(io));
2869 if (SvROK(arg) && SvTYPE(SvRV(arg)) == SVt_PVCV) {
2871 (void)SvREFCNT_inc(filter_sub);
2874 filter_state = SP[i];
2875 (void)SvREFCNT_inc(filter_state);
2879 tryrsfp = PerlIO_open("/dev/null",
2893 filter_has_file = 0;
2894 if (filter_child_proc) {
2895 SvREFCNT_dec(filter_child_proc);
2896 filter_child_proc = 0;
2899 SvREFCNT_dec(filter_state);
2903 SvREFCNT_dec(filter_sub);
2908 char *dir = SvPVx(dirsv, n_a);
2911 if ((unixdir = tounixpath(dir, Nullch)) == Nullch)
2913 sv_setpv(namesv, unixdir);
2914 sv_catpv(namesv, unixname);
2916 Perl_sv_setpvf(aTHX_ namesv, "%s/%s", dir, name);
2918 TAINT_PROPER("require");
2919 tryname = SvPVX(namesv);
2920 tryrsfp = doopen_pmc(tryname, PERL_SCRIPT_MODE);
2922 if (tryname[0] == '.' && tryname[1] == '/')
2930 SAVECOPFILE(&PL_compiling);
2931 CopFILE_set(&PL_compiling, tryrsfp ? tryname : name);
2932 SvREFCNT_dec(namesv);
2934 if (PL_op->op_type == OP_REQUIRE) {
2935 char *msgstr = name;
2936 if (namesv) { /* did we lookup @INC? */
2937 SV *msg = sv_2mortal(newSVpv(msgstr,0));
2938 SV *dirmsgsv = NEWSV(0, 0);
2939 AV *ar = GvAVn(PL_incgv);
2941 sv_catpvn(msg, " in @INC", 8);
2942 if (instr(SvPVX(msg), ".h "))
2943 sv_catpv(msg, " (change .h to .ph maybe?)");
2944 if (instr(SvPVX(msg), ".ph "))
2945 sv_catpv(msg, " (did you run h2ph?)");
2946 sv_catpv(msg, " (@INC contains:");
2947 for (i = 0; i <= AvFILL(ar); i++) {
2948 char *dir = SvPVx(*av_fetch(ar, i, TRUE), n_a);
2949 Perl_sv_setpvf(aTHX_ dirmsgsv, " %s", dir);
2950 sv_catsv(msg, dirmsgsv);
2952 sv_catpvn(msg, ")", 1);
2953 SvREFCNT_dec(dirmsgsv);
2954 msgstr = SvPV_nolen(msg);
2956 DIE(aTHX_ "Can't locate %s", msgstr);
2962 SETERRNO(0, SS$_NORMAL);
2964 /* Assume success here to prevent recursive requirement. */
2965 (void)hv_store(GvHVn(PL_incgv), name, strlen(name),
2966 newSVsv(CopFILESV(&PL_compiling)), 0 );
2970 lex_start(sv_2mortal(newSVpvn("",0)));
2971 SAVEGENERICSV(PL_rsfp_filters);
2972 PL_rsfp_filters = Nullav;
2975 name = savepv(name);
2979 SAVEPPTR(PL_compiling.cop_warnings);
2980 if (PL_dowarn & G_WARN_ALL_ON)
2981 PL_compiling.cop_warnings = WARN_ALL ;
2982 else if (PL_dowarn & G_WARN_ALL_OFF)
2983 PL_compiling.cop_warnings = WARN_NONE ;
2985 PL_compiling.cop_warnings = WARN_STD ;
2987 if (filter_sub || filter_child_proc) {
2988 SV *datasv = filter_add(run_user_filter, Nullsv);
2989 IoLINES(datasv) = filter_has_file;
2990 IoFMT_GV(datasv) = (GV *)filter_child_proc;
2991 IoTOP_GV(datasv) = (GV *)filter_state;
2992 IoBOTTOM_GV(datasv) = (GV *)filter_sub;
2995 /* switch to eval mode */
2996 push_return(PL_op->op_next);
2997 PUSHBLOCK(cx, CXt_EVAL, SP);
2998 PUSHEVAL(cx, name, Nullgv);
3000 SAVECOPLINE(&PL_compiling);
3001 CopLINE_set(&PL_compiling, 0);
3005 MUTEX_LOCK(&PL_eval_mutex);
3006 if (PL_eval_owner && PL_eval_owner != thr)
3007 while (PL_eval_owner)
3008 COND_WAIT(&PL_eval_cond, &PL_eval_mutex);
3009 PL_eval_owner = thr;
3010 MUTEX_UNLOCK(&PL_eval_mutex);
3011 #endif /* USE_THREADS */
3012 return DOCATCH(doeval(G_SCALAR, NULL));
3017 return pp_require();
3023 register PERL_CONTEXT *cx;
3025 I32 gimme = GIMME_V, was = PL_sub_generation;
3026 char tmpbuf[TYPE_DIGITS(long) + 12];
3031 if (!SvPV(sv,len) || !len)
3033 TAINT_PROPER("eval");
3039 /* switch to eval mode */
3041 SAVECOPFILE(&PL_compiling);
3042 sprintf(tmpbuf, "_<(eval %lu)", (unsigned long)++PL_evalseq);
3043 CopFILE_set(&PL_compiling, tmpbuf+2);
3044 CopLINE_set(&PL_compiling, 1);
3045 /* XXX For C<eval "...">s within BEGIN {} blocks, this ends up
3046 deleting the eval's FILEGV from the stash before gv_check() runs
3047 (i.e. before run-time proper). To work around the coredump that
3048 ensues, we always turn GvMULTI_on for any globals that were
3049 introduced within evals. See force_ident(). GSAR 96-10-12 */
3050 safestr = savepv(tmpbuf);
3051 SAVEDELETE(PL_defstash, safestr, strlen(safestr));
3053 PL_hints = PL_op->op_targ;
3054 SAVEPPTR(PL_compiling.cop_warnings);
3055 if (!specialWARN(PL_compiling.cop_warnings)) {
3056 PL_compiling.cop_warnings = newSVsv(PL_compiling.cop_warnings) ;
3057 SAVEFREESV(PL_compiling.cop_warnings) ;
3060 push_return(PL_op->op_next);
3061 PUSHBLOCK(cx, (CXt_EVAL|CXp_REAL), SP);
3062 PUSHEVAL(cx, 0, Nullgv);
3064 /* prepare to compile string */
3066 if (PERLDB_LINE && PL_curstash != PL_debstash)
3067 save_lines(CopFILEAV(&PL_compiling), PL_linestr);
3070 MUTEX_LOCK(&PL_eval_mutex);
3071 if (PL_eval_owner && PL_eval_owner != thr)
3072 while (PL_eval_owner)
3073 COND_WAIT(&PL_eval_cond, &PL_eval_mutex);
3074 PL_eval_owner = thr;
3075 MUTEX_UNLOCK(&PL_eval_mutex);
3076 #endif /* USE_THREADS */
3077 ret = doeval(gimme, NULL);
3078 if (PERLDB_INTER && was != PL_sub_generation /* Some subs defined here. */
3079 && ret != PL_op->op_next) { /* Successive compilation. */
3080 strcpy(safestr, "_<(eval )"); /* Anything fake and short. */
3082 return DOCATCH(ret);
3092 register PERL_CONTEXT *cx;
3094 U8 save_flags = PL_op -> op_flags;
3099 retop = pop_return();
3102 if (gimme == G_VOID)
3104 else if (gimme == G_SCALAR) {
3107 if (SvFLAGS(TOPs) & SVs_TEMP)
3110 *MARK = sv_mortalcopy(TOPs);
3114 *MARK = &PL_sv_undef;
3119 /* in case LEAVE wipes old return values */
3120 for (mark = newsp + 1; mark <= SP; mark++) {
3121 if (!(SvFLAGS(*mark) & SVs_TEMP)) {
3122 *mark = sv_mortalcopy(*mark);
3123 TAINT_NOT; /* Each item is independent */
3127 PL_curpm = newpm; /* Don't pop $1 et al till now */
3129 if (AvFILLp(PL_comppad_name) >= 0)
3133 assert(CvDEPTH(PL_compcv) == 1);
3135 CvDEPTH(PL_compcv) = 0;
3138 if (optype == OP_REQUIRE &&
3139 !(gimme == G_SCALAR ? SvTRUE(*SP) : SP > newsp))
3141 /* Unassume the success we assumed earlier. */
3142 char *name = cx->blk_eval.old_name;
3143 (void)hv_delete(GvHVn(PL_incgv), name, strlen(name), G_DISCARD);
3144 retop = Perl_die(aTHX_ "%s did not return a true value", name);
3145 /* die_where() did LEAVE, or we won't be here */
3149 if (!(save_flags & OPf_SPECIAL))
3159 register PERL_CONTEXT *cx;
3160 I32 gimme = GIMME_V;
3165 push_return(cLOGOP->op_other->op_next);
3166 PUSHBLOCK(cx, CXt_EVAL, SP);
3168 PL_eval_root = PL_op; /* Only needed so that goto works right. */
3170 PL_in_eval = EVAL_INEVAL;
3173 return DOCATCH(PL_op->op_next);
3183 register PERL_CONTEXT *cx;
3191 if (gimme == G_VOID)
3193 else if (gimme == G_SCALAR) {
3196 if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
3199 *MARK = sv_mortalcopy(TOPs);
3203 *MARK = &PL_sv_undef;
3208 /* in case LEAVE wipes old return values */
3209 for (mark = newsp + 1; mark <= SP; mark++) {
3210 if (!(SvFLAGS(*mark) & (SVs_PADTMP|SVs_TEMP))) {
3211 *mark = sv_mortalcopy(*mark);
3212 TAINT_NOT; /* Each item is independent */
3216 PL_curpm = newpm; /* Don't pop $1 et al till now */
3224 S_doparseform(pTHX_ SV *sv)
3227 register char *s = SvPV_force(sv, len);
3228 register char *send = s + len;
3229 register char *base;
3230 register I32 skipspaces = 0;
3233 bool postspace = FALSE;
3241 Perl_croak(aTHX_ "Null picture in formline");
3243 New(804, fops, (send - s)*3+10, U16); /* Almost certainly too long... */
3248 *fpc++ = FF_LINEMARK;
3249 noblank = repeat = FALSE;
3267 case ' ': case '\t':
3278 *fpc++ = FF_LITERAL;
3286 *fpc++ = skipspaces;
3290 *fpc++ = FF_NEWLINE;
3294 arg = fpc - linepc + 1;
3301 *fpc++ = FF_LINEMARK;
3302 noblank = repeat = FALSE;
3311 ischop = s[-1] == '^';
3317 arg = (s - base) - 1;
3319 *fpc++ = FF_LITERAL;
3328 *fpc++ = FF_LINEGLOB;
3330 else if (*s == '#' || (*s == '.' && s[1] == '#')) {
3331 arg = ischop ? 512 : 0;
3341 arg |= 256 + (s - f);
3343 *fpc++ = s - base; /* fieldsize for FETCH */
3344 *fpc++ = FF_DECIMAL;
3349 bool ismore = FALSE;
3352 while (*++s == '>') ;
3353 prespace = FF_SPACE;
3355 else if (*s == '|') {
3356 while (*++s == '|') ;
3357 prespace = FF_HALFSPACE;
3362 while (*++s == '<') ;
3365 if (*s == '.' && s[1] == '.' && s[2] == '.') {
3369 *fpc++ = s - base; /* fieldsize for FETCH */
3371 *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL;
3389 { /* need to jump to the next word */
3391 z = WORD_ALIGN - SvCUR(sv) % WORD_ALIGN;
3392 SvGROW(sv, SvCUR(sv) + z + arg * sizeof(U16) + 4);
3393 s = SvPVX(sv) + SvCUR(sv) + z;
3395 Copy(fops, s, arg, U16);
3397 sv_magic(sv, Nullsv, 'f', Nullch, 0);
3402 * The rest of this file was derived from source code contributed
3405 * NOTE: this code was derived from Tom Horsley's qsort replacement
3406 * and should not be confused with the original code.
3409 /* Copyright (C) Tom Horsley, 1997. All rights reserved.
3411 Permission granted to distribute under the same terms as perl which are
3414 This program is free software; you can redistribute it and/or modify
3415 it under the terms of either:
3417 a) the GNU General Public License as published by the Free
3418 Software Foundation; either version 1, or (at your option) any
3421 b) the "Artistic License" which comes with this Kit.
3423 Details on the perl license can be found in the perl source code which
3424 may be located via the www.perl.com web page.
3426 This is the most wonderfulest possible qsort I can come up with (and
3427 still be mostly portable) My (limited) tests indicate it consistently
3428 does about 20% fewer calls to compare than does the qsort in the Visual
3429 C++ library, other vendors may vary.
3431 Some of the ideas in here can be found in "Algorithms" by Sedgewick,
3432 others I invented myself (or more likely re-invented since they seemed
3433 pretty obvious once I watched the algorithm operate for a while).
3435 Most of this code was written while watching the Marlins sweep the Giants
3436 in the 1997 National League Playoffs - no Braves fans allowed to use this
3437 code (just kidding :-).
3439 I realize that if I wanted to be true to the perl tradition, the only
3440 comment in this file would be something like:
3442 ...they shuffled back towards the rear of the line. 'No, not at the
3443 rear!' the slave-driver shouted. 'Three files up. And stay there...
3445 However, I really needed to violate that tradition just so I could keep
3446 track of what happens myself, not to mention some poor fool trying to
3447 understand this years from now :-).
3450 /* ********************************************************** Configuration */
3452 #ifndef QSORT_ORDER_GUESS
3453 #define QSORT_ORDER_GUESS 2 /* Select doubling version of the netBSD trick */
3456 /* QSORT_MAX_STACK is the largest number of partitions that can be stacked up for
3457 future processing - a good max upper bound is log base 2 of memory size
3458 (32 on 32 bit machines, 64 on 64 bit machines, etc). In reality can
3459 safely be smaller than that since the program is taking up some space and
3460 most operating systems only let you grab some subset of contiguous
3461 memory (not to mention that you are normally sorting data larger than
3462 1 byte element size :-).
3464 #ifndef QSORT_MAX_STACK
3465 #define QSORT_MAX_STACK 32
3468 /* QSORT_BREAK_EVEN is the size of the largest partition we should insertion sort.
3469 Anything bigger and we use qsort. If you make this too small, the qsort
3470 will probably break (or become less efficient), because it doesn't expect
3471 the middle element of a partition to be the same as the right or left -
3472 you have been warned).
3474 #ifndef QSORT_BREAK_EVEN
3475 #define QSORT_BREAK_EVEN 6
3478 /* ************************************************************* Data Types */
3480 /* hold left and right index values of a partition waiting to be sorted (the
3481 partition includes both left and right - right is NOT one past the end or
3482 anything like that).
3484 struct partition_stack_entry {
3487 #ifdef QSORT_ORDER_GUESS
3488 int qsort_break_even;
3492 /* ******************************************************* Shorthand Macros */
3494 /* Note that these macros will be used from inside the qsort function where
3495 we happen to know that the variable 'elt_size' contains the size of an
3496 array element and the variable 'temp' points to enough space to hold a
3497 temp element and the variable 'array' points to the array being sorted
3498 and 'compare' is the pointer to the compare routine.
3500 Also note that there are very many highly architecture specific ways
3501 these might be sped up, but this is simply the most generally portable
3502 code I could think of.
3505 /* Return < 0 == 0 or > 0 as the value of elt1 is < elt2, == elt2, > elt2
3507 #define qsort_cmp(elt1, elt2) \
3508 ((*compare)(aTHXo_ array[elt1], array[elt2]))
3510 #ifdef QSORT_ORDER_GUESS
3511 #define QSORT_NOTICE_SWAP swapped++;
3513 #define QSORT_NOTICE_SWAP
3516 /* swaps contents of array elements elt1, elt2.
3518 #define qsort_swap(elt1, elt2) \
3521 temp = array[elt1]; \
3522 array[elt1] = array[elt2]; \
3523 array[elt2] = temp; \
3526 /* rotate contents of elt1, elt2, elt3 such that elt1 gets elt2, elt2 gets
3527 elt3 and elt3 gets elt1.
3529 #define qsort_rotate(elt1, elt2, elt3) \
3532 temp = array[elt1]; \
3533 array[elt1] = array[elt2]; \
3534 array[elt2] = array[elt3]; \
3535 array[elt3] = temp; \
3538 /* ************************************************************ Debug stuff */
3545 return; /* good place to set a breakpoint */
3548 #define qsort_assert(t) (void)( (t) || (break_here(), 0) )
3551 doqsort_all_asserts(
3555 int (*compare)(const void * elt1, const void * elt2),
3556 int pc_left, int pc_right, int u_left, int u_right)
3560 qsort_assert(pc_left <= pc_right);
3561 qsort_assert(u_right < pc_left);
3562 qsort_assert(pc_right < u_left);
3563 for (i = u_right + 1; i < pc_left; ++i) {
3564 qsort_assert(qsort_cmp(i, pc_left) < 0);
3566 for (i = pc_left; i < pc_right; ++i) {
3567 qsort_assert(qsort_cmp(i, pc_right) == 0);
3569 for (i = pc_right + 1; i < u_left; ++i) {
3570 qsort_assert(qsort_cmp(pc_right, i) < 0);
3574 #define qsort_all_asserts(PC_LEFT, PC_RIGHT, U_LEFT, U_RIGHT) \
3575 doqsort_all_asserts(array, num_elts, elt_size, compare, \
3576 PC_LEFT, PC_RIGHT, U_LEFT, U_RIGHT)
3580 #define qsort_assert(t) ((void)0)
3582 #define qsort_all_asserts(PC_LEFT, PC_RIGHT, U_LEFT, U_RIGHT) ((void)0)
3586 /* ****************************************************************** qsort */
3589 S_qsortsv(pTHX_ SV ** array, size_t num_elts, SVCOMPARE_t compare)
3593 struct partition_stack_entry partition_stack[QSORT_MAX_STACK];
3594 int next_stack_entry = 0;
3598 #ifdef QSORT_ORDER_GUESS
3599 int qsort_break_even;
3603 /* Make sure we actually have work to do.
3605 if (num_elts <= 1) {
3609 /* Setup the initial partition definition and fall into the sorting loop
3612 part_right = (int)(num_elts - 1);
3613 #ifdef QSORT_ORDER_GUESS
3614 qsort_break_even = QSORT_BREAK_EVEN;
3616 #define qsort_break_even QSORT_BREAK_EVEN
3619 if ((part_right - part_left) >= qsort_break_even) {
3620 /* OK, this is gonna get hairy, so lets try to document all the
3621 concepts and abbreviations and variables and what they keep
3624 pc: pivot chunk - the set of array elements we accumulate in the
3625 middle of the partition, all equal in value to the original
3626 pivot element selected. The pc is defined by:
3628 pc_left - the leftmost array index of the pc
3629 pc_right - the rightmost array index of the pc
3631 we start with pc_left == pc_right and only one element
3632 in the pivot chunk (but it can grow during the scan).
3634 u: uncompared elements - the set of elements in the partition
3635 we have not yet compared to the pivot value. There are two
3636 uncompared sets during the scan - one to the left of the pc
3637 and one to the right.
3639 u_right - the rightmost index of the left side's uncompared set
3640 u_left - the leftmost index of the right side's uncompared set
3642 The leftmost index of the left sides's uncompared set
3643 doesn't need its own variable because it is always defined
3644 by the leftmost edge of the whole partition (part_left). The
3645 same goes for the rightmost edge of the right partition
3648 We know there are no uncompared elements on the left once we
3649 get u_right < part_left and no uncompared elements on the
3650 right once u_left > part_right. When both these conditions
3651 are met, we have completed the scan of the partition.
3653 Any elements which are between the pivot chunk and the
3654 uncompared elements should be less than the pivot value on
3655 the left side and greater than the pivot value on the right
3656 side (in fact, the goal of the whole algorithm is to arrange
3657 for that to be true and make the groups of less-than and
3658 greater-then elements into new partitions to sort again).
3660 As you marvel at the complexity of the code and wonder why it
3661 has to be so confusing. Consider some of the things this level
3662 of confusion brings:
3664 Once I do a compare, I squeeze every ounce of juice out of it. I
3665 never do compare calls I don't have to do, and I certainly never
3668 I also never swap any elements unless I can prove there is a
3669 good reason. Many sort algorithms will swap a known value with
3670 an uncompared value just to get things in the right place (or
3671 avoid complexity :-), but that uncompared value, once it gets
3672 compared, may then have to be swapped again. A lot of the
3673 complexity of this code is due to the fact that it never swaps
3674 anything except compared values, and it only swaps them when the
3675 compare shows they are out of position.
3677 int pc_left, pc_right;
3678 int u_right, u_left;
3682 pc_left = ((part_left + part_right) / 2);
3684 u_right = pc_left - 1;
3685 u_left = pc_right + 1;
3687 /* Qsort works best when the pivot value is also the median value
3688 in the partition (unfortunately you can't find the median value
3689 without first sorting :-), so to give the algorithm a helping
3690 hand, we pick 3 elements and sort them and use the median value
3691 of that tiny set as the pivot value.
3693 Some versions of qsort like to use the left middle and right as
3694 the 3 elements to sort so they can insure the ends of the
3695 partition will contain values which will stop the scan in the
3696 compare loop, but when you have to call an arbitrarily complex
3697 routine to do a compare, its really better to just keep track of
3698 array index values to know when you hit the edge of the
3699 partition and avoid the extra compare. An even better reason to
3700 avoid using a compare call is the fact that you can drop off the
3701 edge of the array if someone foolishly provides you with an
3702 unstable compare function that doesn't always provide consistent
3705 So, since it is simpler for us to compare the three adjacent
3706 elements in the middle of the partition, those are the ones we
3707 pick here (conveniently pointed at by u_right, pc_left, and
3708 u_left). The values of the left, center, and right elements
3709 are refered to as l c and r in the following comments.
3712 #ifdef QSORT_ORDER_GUESS
3715 s = qsort_cmp(u_right, pc_left);
3718 s = qsort_cmp(pc_left, u_left);
3719 /* if l < c, c < r - already in order - nothing to do */
3721 /* l < c, c == r - already in order, pc grows */
3723 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3725 /* l < c, c > r - need to know more */
3726 s = qsort_cmp(u_right, u_left);
3728 /* l < c, c > r, l < r - swap c & r to get ordered */
3729 qsort_swap(pc_left, u_left);
3730 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3731 } else if (s == 0) {
3732 /* l < c, c > r, l == r - swap c&r, grow pc */
3733 qsort_swap(pc_left, u_left);
3735 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3737 /* l < c, c > r, l > r - make lcr into rlc to get ordered */
3738 qsort_rotate(pc_left, u_right, u_left);
3739 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3742 } else if (s == 0) {
3744 s = qsort_cmp(pc_left, u_left);
3746 /* l == c, c < r - already in order, grow pc */
3748 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3749 } else if (s == 0) {
3750 /* l == c, c == r - already in order, grow pc both ways */
3753 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3755 /* l == c, c > r - swap l & r, grow pc */
3756 qsort_swap(u_right, u_left);
3758 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3762 s = qsort_cmp(pc_left, u_left);
3764 /* l > c, c < r - need to know more */
3765 s = qsort_cmp(u_right, u_left);
3767 /* l > c, c < r, l < r - swap l & c to get ordered */
3768 qsort_swap(u_right, pc_left);
3769 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3770 } else if (s == 0) {
3771 /* l > c, c < r, l == r - swap l & c, grow pc */
3772 qsort_swap(u_right, pc_left);
3774 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3776 /* l > c, c < r, l > r - rotate lcr into crl to order */
3777 qsort_rotate(u_right, pc_left, u_left);
3778 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3780 } else if (s == 0) {
3781 /* l > c, c == r - swap ends, grow pc */
3782 qsort_swap(u_right, u_left);
3784 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3786 /* l > c, c > r - swap ends to get in order */
3787 qsort_swap(u_right, u_left);
3788 qsort_all_asserts(pc_left, pc_right, u_left + 1, u_right - 1);
3791 /* We now know the 3 middle elements have been compared and
3792 arranged in the desired order, so we can shrink the uncompared
3797 qsort_all_asserts(pc_left, pc_right, u_left, u_right);
3799 /* The above massive nested if was the simple part :-). We now have
3800 the middle 3 elements ordered and we need to scan through the
3801 uncompared sets on either side, swapping elements that are on
3802 the wrong side or simply shuffling equal elements around to get
3803 all equal elements into the pivot chunk.
3807 int still_work_on_left;
3808 int still_work_on_right;
3810 /* Scan the uncompared values on the left. If I find a value
3811 equal to the pivot value, move it over so it is adjacent to
3812 the pivot chunk and expand the pivot chunk. If I find a value
3813 less than the pivot value, then just leave it - its already
3814 on the correct side of the partition. If I find a greater
3815 value, then stop the scan.
3817 while (still_work_on_left = (u_right >= part_left)) {
3818 s = qsort_cmp(u_right, pc_left);
3821 } else if (s == 0) {
3823 if (pc_left != u_right) {
3824 qsort_swap(u_right, pc_left);
3830 qsort_assert(u_right < pc_left);
3831 qsort_assert(pc_left <= pc_right);
3832 qsort_assert(qsort_cmp(u_right + 1, pc_left) <= 0);
3833 qsort_assert(qsort_cmp(pc_left, pc_right) == 0);
3836 /* Do a mirror image scan of uncompared values on the right
3838 while (still_work_on_right = (u_left <= part_right)) {
3839 s = qsort_cmp(pc_right, u_left);
3842 } else if (s == 0) {
3844 if (pc_right != u_left) {
3845 qsort_swap(pc_right, u_left);
3851 qsort_assert(u_left > pc_right);
3852 qsort_assert(pc_left <= pc_right);
3853 qsort_assert(qsort_cmp(pc_right, u_left - 1) <= 0);
3854 qsort_assert(qsort_cmp(pc_left, pc_right) == 0);
3857 if (still_work_on_left) {
3858 /* I know I have a value on the left side which needs to be
3859 on the right side, but I need to know more to decide
3860 exactly the best thing to do with it.
3862 if (still_work_on_right) {
3863 /* I know I have values on both side which are out of
3864 position. This is a big win because I kill two birds
3865 with one swap (so to speak). I can advance the
3866 uncompared pointers on both sides after swapping both
3867 of them into the right place.
3869 qsort_swap(u_right, u_left);
3872 qsort_all_asserts(pc_left, pc_right, u_left, u_right);
3874 /* I have an out of position value on the left, but the
3875 right is fully scanned, so I "slide" the pivot chunk
3876 and any less-than values left one to make room for the
3877 greater value over on the right. If the out of position
3878 value is immediately adjacent to the pivot chunk (there
3879 are no less-than values), I can do that with a swap,
3880 otherwise, I have to rotate one of the less than values
3881 into the former position of the out of position value
3882 and the right end of the pivot chunk into the left end
3886 if (pc_left == u_right) {
3887 qsort_swap(u_right, pc_right);
3888 qsort_all_asserts(pc_left, pc_right-1, u_left, u_right-1);
3890 qsort_rotate(u_right, pc_left, pc_right);
3891 qsort_all_asserts(pc_left, pc_right-1, u_left, u_right-1);
3896 } else if (still_work_on_right) {
3897 /* Mirror image of complex case above: I have an out of
3898 position value on the right, but the left is fully
3899 scanned, so I need to shuffle things around to make room
3900 for the right value on the left.
3903 if (pc_right == u_left) {
3904 qsort_swap(u_left, pc_left);
3905 qsort_all_asserts(pc_left+1, pc_right, u_left+1, u_right);
3907 qsort_rotate(pc_right, pc_left, u_left);
3908 qsort_all_asserts(pc_left+1, pc_right, u_left+1, u_right);
3913 /* No more scanning required on either side of partition,
3914 break out of loop and figure out next set of partitions
3920 /* The elements in the pivot chunk are now in the right place. They
3921 will never move or be compared again. All I have to do is decide
3922 what to do with the stuff to the left and right of the pivot
3925 Notes on the QSORT_ORDER_GUESS ifdef code:
3927 1. If I just built these partitions without swapping any (or
3928 very many) elements, there is a chance that the elements are
3929 already ordered properly (being properly ordered will
3930 certainly result in no swapping, but the converse can't be
3933 2. A (properly written) insertion sort will run faster on
3934 already ordered data than qsort will.
3936 3. Perhaps there is some way to make a good guess about
3937 switching to an insertion sort earlier than partition size 6
3938 (for instance - we could save the partition size on the stack
3939 and increase the size each time we find we didn't swap, thus
3940 switching to insertion sort earlier for partitions with a
3941 history of not swapping).
3943 4. Naturally, if I just switch right away, it will make
3944 artificial benchmarks with pure ascending (or descending)
3945 data look really good, but is that a good reason in general?
3949 #ifdef QSORT_ORDER_GUESS
3951 #if QSORT_ORDER_GUESS == 1
3952 qsort_break_even = (part_right - part_left) + 1;
3954 #if QSORT_ORDER_GUESS == 2
3955 qsort_break_even *= 2;
3957 #if QSORT_ORDER_GUESS == 3
3958 int prev_break = qsort_break_even;
3959 qsort_break_even *= qsort_break_even;
3960 if (qsort_break_even < prev_break) {
3961 qsort_break_even = (part_right - part_left) + 1;
3965 qsort_break_even = QSORT_BREAK_EVEN;
3969 if (part_left < pc_left) {
3970 /* There are elements on the left which need more processing.
3971 Check the right as well before deciding what to do.
3973 if (pc_right < part_right) {
3974 /* We have two partitions to be sorted. Stack the biggest one
3975 and process the smallest one on the next iteration. This
3976 minimizes the stack height by insuring that any additional
3977 stack entries must come from the smallest partition which
3978 (because it is smallest) will have the fewest
3979 opportunities to generate additional stack entries.
3981 if ((part_right - pc_right) > (pc_left - part_left)) {
3982 /* stack the right partition, process the left */
3983 partition_stack[next_stack_entry].left = pc_right + 1;
3984 partition_stack[next_stack_entry].right = part_right;
3985 #ifdef QSORT_ORDER_GUESS
3986 partition_stack[next_stack_entry].qsort_break_even = qsort_break_even;
3988 part_right = pc_left - 1;
3990 /* stack the left partition, process the right */
3991 partition_stack[next_stack_entry].left = part_left;
3992 partition_stack[next_stack_entry].right = pc_left - 1;
3993 #ifdef QSORT_ORDER_GUESS
3994 partition_stack[next_stack_entry].qsort_break_even = qsort_break_even;
3996 part_left = pc_right + 1;
3998 qsort_assert(next_stack_entry < QSORT_MAX_STACK);
4001 /* The elements on the left are the only remaining elements
4002 that need sorting, arrange for them to be processed as the
4005 part_right = pc_left - 1;
4007 } else if (pc_right < part_right) {
4008 /* There is only one chunk on the right to be sorted, make it
4009 the new partition and loop back around.
4011 part_left = pc_right + 1;
4013 /* This whole partition wound up in the pivot chunk, so
4014 we need to get a new partition off the stack.
4016 if (next_stack_entry == 0) {
4017 /* the stack is empty - we are done */
4021 part_left = partition_stack[next_stack_entry].left;
4022 part_right = partition_stack[next_stack_entry].right;
4023 #ifdef QSORT_ORDER_GUESS
4024 qsort_break_even = partition_stack[next_stack_entry].qsort_break_even;
4028 /* This partition is too small to fool with qsort complexity, just
4029 do an ordinary insertion sort to minimize overhead.
4032 /* Assume 1st element is in right place already, and start checking
4033 at 2nd element to see where it should be inserted.
4035 for (i = part_left + 1; i <= part_right; ++i) {
4037 /* Scan (backwards - just in case 'i' is already in right place)
4038 through the elements already sorted to see if the ith element
4039 belongs ahead of one of them.
4041 for (j = i - 1; j >= part_left; --j) {
4042 if (qsort_cmp(i, j) >= 0) {
4043 /* i belongs right after j
4050 /* Looks like we really need to move some things
4054 for (k = i - 1; k >= j; --k)
4055 array[k + 1] = array[k];
4060 /* That partition is now sorted, grab the next one, or get out
4061 of the loop if there aren't any more.
4064 if (next_stack_entry == 0) {
4065 /* the stack is empty - we are done */
4069 part_left = partition_stack[next_stack_entry].left;
4070 part_right = partition_stack[next_stack_entry].right;
4071 #ifdef QSORT_ORDER_GUESS
4072 qsort_break_even = partition_stack[next_stack_entry].qsort_break_even;
4077 /* Believe it or not, the array is sorted at this point! */
4089 sortcv(pTHXo_ SV *a, SV *b)
4092 I32 oldsaveix = PL_savestack_ix;
4093 I32 oldscopeix = PL_scopestack_ix;
4095 GvSV(PL_firstgv) = a;
4096 GvSV(PL_secondgv) = b;
4097 PL_stack_sp = PL_stack_base;
4100 if (PL_stack_sp != PL_stack_base + 1)
4101 Perl_croak(aTHX_ "Sort subroutine didn't return single value");
4102 if (!SvNIOKp(*PL_stack_sp))
4103 Perl_croak(aTHX_ "Sort subroutine didn't return a numeric value");
4104 result = SvIV(*PL_stack_sp);
4105 while (PL_scopestack_ix > oldscopeix) {
4108 leave_scope(oldsaveix);
4114 sv_ncmp(pTHXo_ SV *a, SV *b)
4118 return nv1 < nv2 ? -1 : nv1 > nv2 ? 1 : 0;
4122 sv_i_ncmp(pTHXo_ SV *a, SV *b)
4126 return iv1 < iv2 ? -1 : iv1 > iv2 ? 1 : 0;
4128 #define tryCALL_AMAGICbin(left,right,meth,svp) STMT_START { \
4130 if (PL_amagic_generation) { \
4131 if (SvAMAGIC(left)||SvAMAGIC(right))\
4132 *svp = amagic_call(left, \
4140 amagic_ncmp(pTHXo_ register SV *a, register SV *b)
4143 tryCALL_AMAGICbin(a,b,ncmp,&tmpsv);
4148 I32 i = SvIVX(tmpsv);
4158 return sv_ncmp(aTHXo_ a, b);
4162 amagic_i_ncmp(pTHXo_ register SV *a, register SV *b)
4165 tryCALL_AMAGICbin(a,b,ncmp,&tmpsv);
4170 I32 i = SvIVX(tmpsv);
4180 return sv_i_ncmp(aTHXo_ a, b);
4184 amagic_cmp(pTHXo_ register SV *str1, register SV *str2)
4187 tryCALL_AMAGICbin(str1,str2,scmp,&tmpsv);
4192 I32 i = SvIVX(tmpsv);
4202 return sv_cmp(str1, str2);
4206 amagic_cmp_locale(pTHXo_ register SV *str1, register SV *str2)
4209 tryCALL_AMAGICbin(str1,str2,scmp,&tmpsv);
4214 I32 i = SvIVX(tmpsv);
4224 return sv_cmp_locale(str1, str2);
4228 run_user_filter(pTHXo_ int idx, SV *buf_sv, int maxlen)
4230 SV *datasv = FILTER_DATA(idx);
4231 int filter_has_file = IoLINES(datasv);
4232 GV *filter_child_proc = (GV *)IoFMT_GV(datasv);
4233 SV *filter_state = (SV *)IoTOP_GV(datasv);
4234 SV *filter_sub = (SV *)IoBOTTOM_GV(datasv);
4237 /* I was having segfault trouble under Linux 2.2.5 after a
4238 parse error occured. (Had to hack around it with a test
4239 for PL_error_count == 0.) Solaris doesn't segfault --
4240 not sure where the trouble is yet. XXX */
4242 if (filter_has_file) {
4243 len = FILTER_READ(idx+1, buf_sv, maxlen);
4246 if (filter_sub && len >= 0) {
4257 PUSHs(sv_2mortal(newSViv(maxlen)));
4259 PUSHs(filter_state);
4262 count = call_sv(filter_sub, G_SCALAR);
4278 IoLINES(datasv) = 0;
4279 if (filter_child_proc) {
4280 SvREFCNT_dec(filter_child_proc);
4281 IoFMT_GV(datasv) = Nullgv;
4284 SvREFCNT_dec(filter_state);
4285 IoTOP_GV(datasv) = Nullgv;
4288 SvREFCNT_dec(filter_sub);
4289 IoBOTTOM_GV(datasv) = Nullgv;
4291 filter_del(run_user_filter);
4300 sv_cmp_locale_static(pTHXo_ register SV *str1, register SV *str2)
4302 return sv_cmp_locale(str1, str2);
4306 sv_cmp_static(pTHXo_ register SV *str1, register SV *str2)
4308 return sv_cmp(str1, str2);
4311 #endif /* PERL_OBJECT */