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- /* pp_ctl.c
- *
- * Copyright (c) 1991-1994, Larry Wall
- *
- * You may distribute under the terms of either the GNU General Public
- * License or the Artistic License, as specified in the README file.
- *
- */
-
- /*
- * Now far ahead the Road has gone,
- * And I must follow, if I can,
- * Pursuing it with eager feet,
- * Until it joins some larger way
- * Where many paths and errands meet.
- * And whither then? I cannot say.
- */
-
- #include "EXTERN.h"
- #include "perl.h"
-
- #ifndef WORD_ALIGN
- #define WORD_ALIGN sizeof(U16)
- #endif
-
- static OP *doeval _((int gimme));
- static OP *dofindlabel _((OP *op, char *label, OP **opstack));
- static void doparseform _((SV *sv));
- static I32 dopoptoeval _((I32 startingblock));
- static I32 dopoptolabel _((char *label));
- static I32 dopoptoloop _((I32 startingblock));
- static I32 dopoptosub _((I32 startingblock));
- static void save_lines _((AV *array, SV *sv));
- static int sortcmp _((const void *, const void *));
- static int sortcv _((const void *, const void *));
-
- static I32 sortcxix;
-
- PP(pp_wantarray)
- {
- dSP;
- I32 cxix;
- EXTEND(SP, 1);
-
- cxix = dopoptosub(cxstack_ix);
- if (cxix < 0)
- RETPUSHUNDEF;
-
- if (cxstack[cxix].blk_gimme == G_ARRAY)
- RETPUSHYES;
- else
- RETPUSHNO;
- }
-
- PP(pp_regcmaybe)
- {
- return NORMAL;
- }
-
- PP(pp_regcomp) {
- dSP;
- register PMOP *pm = (PMOP*)cLOGOP->op_other;
- register char *t;
- SV *tmpstr;
- STRLEN len;
-
- tmpstr = POPs;
- t = SvPV(tmpstr, len);
-
- if (pm->op_pmregexp) {
- pregfree(pm->op_pmregexp);
- pm->op_pmregexp = Null(REGEXP*); /* crucial if regcomp aborts */
- }
-
- pm->op_pmregexp = pregcomp(t, t + len, pm);
-
- if (!pm->op_pmregexp->prelen && curpm)
- pm = curpm;
- else if (strEQ("\\s+", pm->op_pmregexp->precomp))
- pm->op_pmflags |= PMf_WHITE;
-
- if (pm->op_pmflags & PMf_KEEP) {
- pm->op_pmflags &= ~PMf_RUNTIME; /* no point compiling again */
- hoistmust(pm);
- cLOGOP->op_first->op_next = op->op_next;
- }
- RETURN;
- }
-
- PP(pp_substcont)
- {
- dSP;
- register PMOP *pm = (PMOP*) cLOGOP->op_other;
- register CONTEXT *cx = &cxstack[cxstack_ix];
- register SV *dstr = cx->sb_dstr;
- register char *s = cx->sb_s;
- register char *m = cx->sb_m;
- char *orig = cx->sb_orig;
- register REGEXP *rx = pm->op_pmregexp;
-
- if (cx->sb_iters++) {
- if (cx->sb_iters > cx->sb_maxiters)
- DIE("Substitution loop");
-
- sv_catsv(dstr, POPs);
- if (rx->subbase)
- Safefree(rx->subbase);
- rx->subbase = cx->sb_subbase;
-
- /* Are we done */
- if (cx->sb_once || !pregexec(rx, s, cx->sb_strend, orig,
- s == m, Nullsv, cx->sb_safebase))
- {
- SV *targ = cx->sb_targ;
- sv_catpvn(dstr, s, cx->sb_strend - s);
-
- Safefree(SvPVX(targ));
- SvPVX(targ) = SvPVX(dstr);
- SvCUR_set(targ, SvCUR(dstr));
- SvLEN_set(targ, SvLEN(dstr));
- SvPVX(dstr) = 0;
- sv_free(dstr);
-
- (void)SvPOK_only(targ);
- SvSETMAGIC(targ);
- PUSHs(sv_2mortal(newSViv((I32)cx->sb_iters - 1)));
- POPSUBST(cx);
- RETURNOP(pm->op_next);
- }
- }
- if (rx->subbase && rx->subbase != orig) {
- m = s;
- s = orig;
- cx->sb_orig = orig = rx->subbase;
- s = orig + (m - s);
- cx->sb_strend = s + (cx->sb_strend - m);
- }
- cx->sb_m = m = rx->startp[0];
- sv_catpvn(dstr, s, m-s);
- cx->sb_s = rx->endp[0];
- cx->sb_subbase = rx->subbase;
-
- rx->subbase = Nullch; /* so recursion works */
- RETURNOP(pm->op_pmreplstart);
- }
-
- PP(pp_formline)
- {
- dSP; dMARK; dORIGMARK;
- register SV *form = *++MARK;
- register U16 *fpc;
- register char *t;
- register char *f;
- register char *s;
- register char *send;
- register I32 arg;
- register SV *sv;
- char *item;
- I32 itemsize;
- I32 fieldsize;
- I32 lines = 0;
- bool chopspace = (strchr(chopset, ' ') != Nullch);
- char *chophere;
- char *linemark;
- double value;
- bool gotsome;
- STRLEN len;
-
- if (!SvCOMPILED(form)) {
- SvREADONLY_off(form);
- doparseform(form);
- }
-
- SvPV_force(formtarget, len);
- t = SvGROW(formtarget, len + SvCUR(form) + 1); /* XXX SvCUR bad */
- t += len;
- f = SvPV(form, len);
- /* need to jump to the next word */
- s = f + len + WORD_ALIGN - SvCUR(form) % WORD_ALIGN;
-
- fpc = (U16*)s;
-
- for (;;) {
- DEBUG_f( {
- char *name = "???";
- arg = -1;
- switch (*fpc) {
- case FF_LITERAL: arg = fpc[1]; name = "LITERAL"; break;
- case FF_BLANK: arg = fpc[1]; name = "BLANK"; break;
- case FF_SKIP: arg = fpc[1]; name = "SKIP"; break;
- case FF_FETCH: arg = fpc[1]; name = "FETCH"; break;
- case FF_DECIMAL: arg = fpc[1]; name = "DECIMAL"; break;
-
- case FF_CHECKNL: name = "CHECKNL"; break;
- case FF_CHECKCHOP: name = "CHECKCHOP"; break;
- case FF_SPACE: name = "SPACE"; break;
- case FF_HALFSPACE: name = "HALFSPACE"; break;
- case FF_ITEM: name = "ITEM"; break;
- case FF_CHOP: name = "CHOP"; break;
- case FF_LINEGLOB: name = "LINEGLOB"; break;
- case FF_NEWLINE: name = "NEWLINE"; break;
- case FF_MORE: name = "MORE"; break;
- case FF_LINEMARK: name = "LINEMARK"; break;
- case FF_END: name = "END"; break;
- }
- if (arg >= 0)
- fprintf(stderr, "%-16s%ld\n", name, (long) arg);
- else
- fprintf(stderr, "%-16s\n", name);
- } )
- switch (*fpc++) {
- case FF_LINEMARK:
- linemark = t;
- lines++;
- gotsome = FALSE;
- break;
-
- case FF_LITERAL:
- arg = *fpc++;
- while (arg--)
- *t++ = *f++;
- break;
-
- case FF_SKIP:
- f += *fpc++;
- break;
-
- case FF_FETCH:
- arg = *fpc++;
- f += arg;
- fieldsize = arg;
-
- if (MARK < SP)
- sv = *++MARK;
- else {
- sv = &sv_no;
- if (dowarn)
- warn("Not enough format arguments");
- }
- break;
-
- case FF_CHECKNL:
- item = s = SvPV(sv, len);
- itemsize = len;
- if (itemsize > fieldsize)
- itemsize = fieldsize;
- send = chophere = s + itemsize;
- while (s < send) {
- if (*s & ~31)
- gotsome = TRUE;
- else if (*s == '\n')
- break;
- s++;
- }
- itemsize = s - item;
- break;
-
- case FF_CHECKCHOP:
- item = s = SvPV(sv, len);
- itemsize = len;
- if (itemsize <= fieldsize) {
- send = chophere = s + itemsize;
- while (s < send) {
- if (*s == '\r') {
- itemsize = s - item;
- break;
- }
- if (*s++ & ~31)
- gotsome = TRUE;
- }
- }
- else {
- itemsize = fieldsize;
- send = chophere = s + itemsize;
- while (s < send || (s == send && isSPACE(*s))) {
- if (isSPACE(*s)) {
- if (chopspace)
- chophere = s;
- if (*s == '\r')
- break;
- }
- else {
- if (*s & ~31)
- gotsome = TRUE;
- if (strchr(chopset, *s))
- chophere = s + 1;
- }
- s++;
- }
- itemsize = chophere - item;
- }
- break;
-
- case FF_SPACE:
- arg = fieldsize - itemsize;
- if (arg) {
- fieldsize -= arg;
- while (arg-- > 0)
- *t++ = ' ';
- }
- break;
-
- case FF_HALFSPACE:
- arg = fieldsize - itemsize;
- if (arg) {
- arg /= 2;
- fieldsize -= arg;
- while (arg-- > 0)
- *t++ = ' ';
- }
- break;
-
- case FF_ITEM:
- arg = itemsize;
- s = item;
- while (arg--) {
- #if 'z' - 'a' != 25
- int ch = *t++ = *s++;
- if (!iscntrl(ch))
- t[-1] = ' ';
- #else
- if ( !((*t++ = *s++) & ~31) )
- t[-1] = ' ';
- #endif
-
- }
- break;
-
- case FF_CHOP:
- s = chophere;
- if (chopspace) {
- while (*s && isSPACE(*s))
- s++;
- }
- sv_chop(sv,s);
- break;
-
- case FF_LINEGLOB:
- item = s = SvPV(sv, len);
- itemsize = len;
- if (itemsize) {
- gotsome = TRUE;
- send = s + itemsize;
- while (s < send) {
- if (*s++ == '\n') {
- if (s == send)
- itemsize--;
- else
- lines++;
- }
- }
- SvCUR_set(formtarget, t - SvPVX(formtarget));
- sv_catpvn(formtarget, item, itemsize);
- SvGROW(formtarget, SvCUR(formtarget) + SvCUR(form) + 1);
- t = SvPVX(formtarget) + SvCUR(formtarget);
- }
- break;
-
- case FF_DECIMAL:
- /* If the field is marked with ^ and the value is undefined,
- blank it out. */
- arg = *fpc++;
- if ((arg & 512) && !SvOK(sv)) {
- arg = fieldsize;
- while (arg--)
- *t++ = ' ';
- break;
- }
- gotsome = TRUE;
- value = SvNV(sv);
- if (arg & 256) {
- sprintf(t, "%#*.*f", (int) fieldsize, (int) arg & 255, value);
- } else {
- sprintf(t, "%*.0f", (int) fieldsize, value);
- }
- t += fieldsize;
- break;
-
- case FF_NEWLINE:
- f++;
- while (t-- > linemark && *t == ' ') ;
- t++;
- *t++ = '\n';
- break;
-
- case FF_BLANK:
- arg = *fpc++;
- if (gotsome) {
- if (arg) { /* repeat until fields exhausted? */
- *t = '\0';
- SvCUR_set(formtarget, t - SvPVX(formtarget));
- lines += FmLINES(formtarget);
- if (lines == 200) {
- arg = t - linemark;
- if (strnEQ(linemark, linemark - arg, arg))
- DIE("Runaway format");
- }
- FmLINES(formtarget) = lines;
- SP = ORIGMARK;
- RETURNOP(cLISTOP->op_first);
- }
- }
- else {
- t = linemark;
- lines--;
- }
- break;
-
- case FF_MORE:
- if (itemsize) {
- arg = fieldsize - itemsize;
- if (arg) {
- fieldsize -= arg;
- while (arg-- > 0)
- *t++ = ' ';
- }
- s = t - 3;
- if (strnEQ(s," ",3)) {
- while (s > SvPVX(formtarget) && isSPACE(s[-1]))
- s--;
- }
- *s++ = '.';
- *s++ = '.';
- *s++ = '.';
- }
- break;
-
- case FF_END:
- *t = '\0';
- SvCUR_set(formtarget, t - SvPVX(formtarget));
- FmLINES(formtarget) += lines;
- SP = ORIGMARK;
- RETPUSHYES;
- }
- }
- }
-
- PP(pp_grepstart)
- {
- dSP;
- SV *src;
-
- if (stack_base + *markstack_ptr == sp) {
- (void)POPMARK;
- if (GIMME != G_ARRAY)
- XPUSHs(&sv_no);
- RETURNOP(op->op_next->op_next);
- }
- stack_sp = stack_base + *markstack_ptr + 1;
- pp_pushmark(); /* push dst */
- pp_pushmark(); /* push src */
- ENTER; /* enter outer scope */
-
- SAVETMPS;
- SAVESPTR(GvSV(defgv));
-
- ENTER; /* enter inner scope */
- SAVESPTR(curpm);
-
- src = stack_base[*markstack_ptr];
- SvTEMP_off(src);
- GvSV(defgv) = src;
-
- PUTBACK;
- if (op->op_type == OP_MAPSTART)
- pp_pushmark(); /* push top */
- return ((LOGOP*)op->op_next)->op_other;
- }
-
- PP(pp_mapstart)
- {
- DIE("panic: mapstart"); /* uses grepstart */
- }
-
- PP(pp_mapwhile)
- {
- dSP;
- I32 diff = (sp - stack_base) - *markstack_ptr;
- I32 count;
- I32 shift;
- SV** src;
- SV** dst;
-
- ++markstack_ptr[-1];
- if (diff) {
- if (diff > markstack_ptr[-1] - markstack_ptr[-2]) {
- shift = diff - (markstack_ptr[-1] - markstack_ptr[-2]);
- count = (sp - stack_base) - markstack_ptr[-1] + 2;
-
- EXTEND(sp,shift);
- src = sp;
- dst = (sp += shift);
- markstack_ptr[-1] += shift;
- *markstack_ptr += shift;
- while (--count)
- *dst-- = *src--;
- }
- dst = stack_base + (markstack_ptr[-2] += diff) - 1;
- ++diff;
- while (--diff)
- *dst-- = SvTEMP(TOPs) ? POPs : sv_mortalcopy(POPs);
- }
- LEAVE; /* exit inner scope */
-
- /* All done yet? */
- if (markstack_ptr[-1] > *markstack_ptr) {
- I32 items;
-
- (void)POPMARK; /* pop top */
- LEAVE; /* exit outer scope */
- (void)POPMARK; /* pop src */
- items = --*markstack_ptr - markstack_ptr[-1];
- (void)POPMARK; /* pop dst */
- SP = stack_base + POPMARK; /* pop original mark */
- if (GIMME != G_ARRAY) {
- dTARGET;
- XPUSHi(items);
- RETURN;
- }
- SP += items;
- RETURN;
- }
- else {
- SV *src;
-
- ENTER; /* enter inner scope */
- SAVESPTR(curpm);
-
- src = stack_base[markstack_ptr[-1]];
- SvTEMP_off(src);
- GvSV(defgv) = src;
-
- RETURNOP(cLOGOP->op_other);
- }
- }
-
-
- PP(pp_sort)
- {
- dSP; dMARK; dORIGMARK;
- register SV **up;
- SV **myorigmark = ORIGMARK;
- register I32 max;
- HV *stash;
- GV *gv;
- CV *cv;
- I32 gimme = GIMME;
- OP* nextop = op->op_next;
-
- if (gimme != G_ARRAY) {
- SP = MARK;
- RETPUSHUNDEF;
- }
-
- if (op->op_flags & OPf_STACKED) {
- ENTER;
- if (op->op_flags & OPf_SPECIAL) {
- OP *kid = cLISTOP->op_first->op_sibling; /* pass pushmark */
- kid = kUNOP->op_first; /* pass rv2gv */
- kid = kUNOP->op_first; /* pass leave */
- sortcop = kid->op_next;
- stash = curcop->cop_stash;
- }
- else {
- cv = sv_2cv(*++MARK, &stash, &gv, 0);
- if (!(cv && CvROOT(cv))) {
- if (gv) {
- SV *tmpstr = sv_newmortal();
- gv_efullname(tmpstr, gv);
- if (cv && CvXSUB(cv))
- DIE("Xsub \"%s\" called in sort", SvPVX(tmpstr));
- DIE("Undefined sort subroutine \"%s\" called",
- SvPVX(tmpstr));
- }
- if (cv) {
- if (CvXSUB(cv))
- DIE("Xsub called in sort");
- DIE("Undefined subroutine in sort");
- }
- DIE("Not a CODE reference in sort");
- }
- sortcop = CvSTART(cv);
- SAVESPTR(CvROOT(cv)->op_ppaddr);
- CvROOT(cv)->op_ppaddr = ppaddr[OP_NULL];
-
- SAVESPTR(curpad);
- curpad = AvARRAY((AV*)AvARRAY(CvPADLIST(cv))[1]);
- }
- }
- else {
- sortcop = Nullop;
- stash = curcop->cop_stash;
- }
-
- up = myorigmark + 1;
- while (MARK < SP) { /* This may or may not shift down one here. */
- /*SUPPRESS 560*/
- if (*up = *++MARK) { /* Weed out nulls. */
- if (!SvPOK(*up))
- (void)sv_2pv(*up, &na);
- else
- SvTEMP_off(*up);
- up++;
- }
- }
- max = --up - myorigmark;
- if (sortcop) {
- if (max > 1) {
- AV *oldstack;
- CONTEXT *cx;
- SV** newsp;
-
- SAVETMPS;
- SAVESPTR(op);
-
- oldstack = stack;
- if (!sortstack) {
- sortstack = newAV();
- AvREAL_off(sortstack);
- av_extend(sortstack, 32);
- }
- SWITCHSTACK(stack, sortstack);
- if (sortstash != stash) {
- firstgv = gv_fetchpv("a", TRUE, SVt_PV);
- secondgv = gv_fetchpv("b", TRUE, SVt_PV);
- sortstash = stash;
- }
-
- SAVESPTR(GvSV(firstgv));
- SAVESPTR(GvSV(secondgv));
- PUSHBLOCK(cx, CXt_LOOP, stack_base);
- sortcxix = cxstack_ix;
-
- qsort((char*)(myorigmark+1), max, sizeof(SV*), sortcv);
-
- POPBLOCK(cx,curpm);
- SWITCHSTACK(sortstack, oldstack);
- }
- LEAVE;
- }
- else {
- if (max > 1) {
- MEXTEND(SP, 20); /* Can't afford stack realloc on signal. */
- qsort((char*)(ORIGMARK+1), max, sizeof(SV*), sortcmp);
- }
- }
- stack_sp = ORIGMARK + max;
- return nextop;
- }
-
- /* Range stuff. */
-
- PP(pp_range)
- {
- if (GIMME == G_ARRAY)
- return cCONDOP->op_true;
- return SvTRUEx(PAD_SV(op->op_targ)) ? cCONDOP->op_false : cCONDOP->op_true;
- }
-
- PP(pp_flip)
- {
- dSP;
-
- if (GIMME == G_ARRAY) {
- RETURNOP(((CONDOP*)cUNOP->op_first)->op_false);
- }
- else {
- dTOPss;
- SV *targ = PAD_SV(op->op_targ);
-
- if ((op->op_private & OPpFLIP_LINENUM)
- ? last_in_gv && SvIV(sv) == IoLINES(GvIOp(last_in_gv))
- : SvTRUE(sv) ) {
- sv_setiv(PAD_SV(cUNOP->op_first->op_targ), 1);
- if (op->op_flags & OPf_SPECIAL) {
- sv_setiv(targ, 1);
- RETURN;
- }
- else {
- sv_setiv(targ, 0);
- sp--;
- RETURNOP(((CONDOP*)cUNOP->op_first)->op_false);
- }
- }
- sv_setpv(TARG, "");
- SETs(targ);
- RETURN;
- }
- }
-
- PP(pp_flop)
- {
- dSP;
-
- if (GIMME == G_ARRAY) {
- dPOPPOPssrl;
- register I32 i;
- register SV *sv;
- I32 max;
-
- if (SvNIOK(left) || !SvPOK(left) ||
- (looks_like_number(left) && *SvPVX(left) != '0') ) {
- i = SvIV(left);
- max = SvIV(right);
- if (max > i)
- EXTEND(SP, max - i + 1);
- while (i <= max) {
- sv = sv_mortalcopy(&sv_no);
- sv_setiv(sv,i++);
- PUSHs(sv);
- }
- }
- else {
- SV *final = sv_mortalcopy(right);
- STRLEN len;
- char *tmps = SvPV(final, len);
-
- sv = sv_mortalcopy(left);
- while (!SvNIOK(sv) && SvCUR(sv) <= len &&
- strNE(SvPVX(sv),tmps) ) {
- XPUSHs(sv);
- sv = sv_2mortal(newSVsv(sv));
- sv_inc(sv);
- }
- if (strEQ(SvPVX(sv),tmps))
- XPUSHs(sv);
- }
- }
- else {
- dTOPss;
- SV *targ = PAD_SV(cUNOP->op_first->op_targ);
- sv_inc(targ);
- if ((op->op_private & OPpFLIP_LINENUM)
- ? last_in_gv && SvIV(sv) == IoLINES(GvIOp(last_in_gv))
- : SvTRUE(sv) ) {
- sv_setiv(PAD_SV(((UNOP*)cUNOP->op_first)->op_first->op_targ), 0);
- sv_catpv(targ, "E0");
- }
- SETs(targ);
- }
-
- RETURN;
- }
-
- /* Control. */
-
- static I32
- dopoptolabel(label)
- char *label;
- {
- register I32 i;
- register CONTEXT *cx;
-
- for (i = cxstack_ix; i >= 0; i--) {
- cx = &cxstack[i];
- switch (cx->cx_type) {
- case CXt_SUBST:
- if (dowarn)
- warn("Exiting substitution via %s", op_name[op->op_type]);
- break;
- case CXt_SUB:
- if (dowarn)
- warn("Exiting subroutine via %s", op_name[op->op_type]);
- break;
- case CXt_EVAL:
- if (dowarn)
- warn("Exiting eval via %s", op_name[op->op_type]);
- break;
- case CXt_LOOP:
- if (!cx->blk_loop.label ||
- strNE(label, cx->blk_loop.label) ) {
- DEBUG_l(deb("(Skipping label #%d %s)\n",
- i, cx->blk_loop.label));
- continue;
- }
- DEBUG_l( deb("(Found label #%d %s)\n", i, label));
- return i;
- }
- }
- return i;
- }
-
- I32
- dowantarray()
- {
- I32 cxix;
-
- cxix = dopoptosub(cxstack_ix);
- if (cxix < 0)
- return G_SCALAR;
-
- if (cxstack[cxix].blk_gimme == G_ARRAY)
- return G_ARRAY;
- else
- return G_SCALAR;
- }
-
- static I32
- dopoptosub(startingblock)
- I32 startingblock;
- {
- I32 i;
- register CONTEXT *cx;
- for (i = startingblock; i >= 0; i--) {
- cx = &cxstack[i];
- switch (cx->cx_type) {
- default:
- continue;
- case CXt_EVAL:
- case CXt_SUB:
- DEBUG_l( deb("(Found sub #%d)\n", i));
- return i;
- }
- }
- return i;
- }
-
- static I32
- dopoptoeval(startingblock)
- I32 startingblock;
- {
- I32 i;
- register CONTEXT *cx;
- for (i = startingblock; i >= 0; i--) {
- cx = &cxstack[i];
- switch (cx->cx_type) {
- default:
- continue;
- case CXt_EVAL:
- DEBUG_l( deb("(Found eval #%d)\n", i));
- return i;
- }
- }
- return i;
- }
-
- static I32
- dopoptoloop(startingblock)
- I32 startingblock;
- {
- I32 i;
- register CONTEXT *cx;
- for (i = startingblock; i >= 0; i--) {
- cx = &cxstack[i];
- switch (cx->cx_type) {
- case CXt_SUBST:
- if (dowarn)
- warn("Exiting substitition via %s", op_name[op->op_type]);
- break;
- case CXt_SUB:
- if (dowarn)
- warn("Exiting subroutine via %s", op_name[op->op_type]);
- break;
- case CXt_EVAL:
- if (dowarn)
- warn("Exiting eval via %s", op_name[op->op_type]);
- break;
- case CXt_LOOP:
- DEBUG_l( deb("(Found loop #%d)\n", i));
- return i;
- }
- }
- return i;
- }
-
- void
- dounwind(cxix)
- I32 cxix;
- {
- register CONTEXT *cx;
- SV **newsp;
- I32 optype;
-
- while (cxstack_ix > cxix) {
- cx = &cxstack[cxstack_ix--];
- DEBUG_l(fprintf(stderr, "Unwinding block %ld, type %s\n", (long) cxstack_ix+1,
- block_type[cx->cx_type]));
- /* Note: we don't need to restore the base context info till the end. */
- switch (cx->cx_type) {
- case CXt_SUB:
- POPSUB(cx);
- break;
- case CXt_EVAL:
- POPEVAL(cx);
- break;
- case CXt_LOOP:
- POPLOOP(cx);
- break;
- case CXt_SUBST:
- break;
- }
- }
- }
-
- #ifdef I_STDARG
- OP *
- die(char* pat, ...)
- #else
- /*VARARGS0*/
- OP *
- die(pat, va_alist)
- char *pat;
- va_dcl
- #endif
- {
- va_list args;
- char *message;
- int oldrunlevel = runlevel;
- int was_in_eval = in_eval;
- HV *stash;
- GV *gv;
- CV *cv;
-
- #ifdef I_STDARG
- va_start(args, pat);
- #else
- va_start(args);
- #endif
- message = mess(pat, &args);
- va_end(args);
- if (diehook && (cv = sv_2cv(diehook, &stash, &gv, 0)) && !CvDEPTH(cv)) {
- dSP;
-
- PUSHMARK(sp);
- EXTEND(sp, 1);
- PUSHs(sv_2mortal(newSVpv(message,0)));
- PUTBACK;
- perl_call_sv((SV*)cv, G_DISCARD);
- }
- restartop = die_where(message);
- if ((!restartop && was_in_eval) || oldrunlevel > 1)
- longjmp(top_env, 3);
- return restartop;
- }
-
- OP *
- die_where(message)
- char *message;
- {
- if (in_eval) {
- I32 cxix;
- register CONTEXT *cx;
- I32 gimme;
- SV **newsp;
- SV *errsv;
-
- errsv = GvSV(gv_fetchpv("@",TRUE, SVt_PV));
- /* As destructors may produce errors we set $@ at the last moment */
- sv_setpv(errsv, ""); /* clear $@ before destroying */
-
- cxix = dopoptoeval(cxstack_ix);
- if (cxix >= 0) {
- I32 optype;
-
- if (cxix < cxstack_ix)
- dounwind(cxix);
-
- POPBLOCK(cx,curpm);
- if (cx->cx_type != CXt_EVAL) {
- fprintf(stderr, "panic: die %s", message);
- my_exit(1);
- }
- POPEVAL(cx);
-
- if (gimme == G_SCALAR)
- *++newsp = &sv_undef;
- stack_sp = newsp;
-
- LEAVE;
-
- sv_insert(errsv, 0, 0, message, strlen(message));
- if (optype == OP_REQUIRE)
- DIE("%s", SvPVx(GvSV(gv_fetchpv("@",TRUE, SVt_PV)), na));
- return pop_return();
- }
- }
- fputs(message, stderr);
- (void)fflush(stderr);
- if (e_fp)
- (void)UNLINK(e_tmpname);
- statusvalue = SHIFTSTATUS(statusvalue);
- #ifdef VMS
- my_exit((U32)vaxc$errno?vaxc$errno:errno?errno:statusvalue?statusvalue:SS$_ABORT);
- #else
- my_exit((I32)((errno&255)?errno:((statusvalue&255)?statusvalue:255)));
- #endif
- return 0;
- }
-
- PP(pp_xor)
- {
- dSP; dPOPTOPssrl;
- if (SvTRUE(left) != SvTRUE(right))
- RETSETYES;
- else
- RETSETNO;
- }
-
- PP(pp_andassign)
- {
- dSP;
- if (!SvTRUE(TOPs))
- RETURN;
- else
- RETURNOP(cLOGOP->op_other);
- }
-
- PP(pp_orassign)
- {
- dSP;
- if (SvTRUE(TOPs))
- RETURN;
- else
- RETURNOP(cLOGOP->op_other);
- }
-
- #ifdef DEPRECATED
- PP(pp_entersubr)
- {
- dSP;
- SV** mark = (stack_base + *markstack_ptr + 1);
- SV* cv = *mark;
- while (mark < sp) { /* emulate old interface */
- *mark = mark[1];
- mark++;
- }
- *sp = cv;
- return pp_entersub();
- }
- #endif
-
- PP(pp_caller)
- {
- dSP;
- register I32 cxix = dopoptosub(cxstack_ix);
- register CONTEXT *cx;
- I32 dbcxix;
- SV *sv;
- I32 count = 0;
-
- if (MAXARG)
- count = POPi;
- EXTEND(SP, 6);
- for (;;) {
- if (cxix < 0) {
- if (GIMME != G_ARRAY)
- RETPUSHUNDEF;
- RETURN;
- }
- if (DBsub && cxix >= 0 &&
- cxstack[cxix].blk_sub.cv == GvCV(DBsub))
- count++;
- if (!count--)
- break;
- cxix = dopoptosub(cxix - 1);
- }
- cx = &cxstack[cxix];
- if (GIMME != G_ARRAY) {
- dTARGET;
-
- sv_setpv(TARG, HvNAME(cx->blk_oldcop->cop_stash));
- PUSHs(TARG);
- RETURN;
- }
- dbcxix = dopoptosub(cxix - 1);
- if (DBsub && dbcxix >= 0 && cxstack[dbcxix].blk_sub.cv == GvCV(DBsub))
- cx = &cxstack[dbcxix];
-
- PUSHs(sv_2mortal(newSVpv(HvNAME(cx->blk_oldcop->cop_stash), 0)));
- PUSHs(sv_2mortal(newSVpv(SvPVX(GvSV(cx->blk_oldcop->cop_filegv)), 0)));
- PUSHs(sv_2mortal(newSViv((I32)cx->blk_oldcop->cop_line)));
- if (!MAXARG)
- RETURN;
- if (cx->cx_type == CXt_SUB) {
- sv = NEWSV(49, 0);
- gv_efullname(sv, CvGV(cxstack[cxix].blk_sub.cv));
- PUSHs(sv_2mortal(sv));
- PUSHs(sv_2mortal(newSViv((I32)cx->blk_sub.hasargs)));
- }
- else {
- PUSHs(sv_2mortal(newSVpv("(eval)",0)));
- PUSHs(sv_2mortal(newSViv(0)));
- }
- PUSHs(sv_2mortal(newSViv((I32)cx->blk_gimme)));
- if (cx->cx_type == CXt_EVAL && cx->blk_eval.old_op_type == OP_ENTEREVAL)
- PUSHs(cx->blk_eval.cur_text);
-
- if (cx->blk_sub.hasargs && curcop->cop_stash == debstash) {
- AV *ary = cx->blk_sub.argarray;
- int off = AvARRAY(ary) - AvALLOC(ary);
-
- if (!dbargs) {
- GV* tmpgv;
- dbargs = GvAV(gv_AVadd(tmpgv = gv_fetchpv("DB::args", TRUE,
- SVt_PVAV)));
- SvMULTI_on(tmpgv);
- AvREAL_off(dbargs); /* XXX Should be REIFY */
- }
-
- if (AvMAX(dbargs) < AvFILL(ary) + off)
- av_extend(dbargs, AvFILL(ary) + off);
- Copy(AvALLOC(ary), AvARRAY(dbargs), AvFILL(ary) + 1 + off, SV*);
- AvFILL(dbargs) = AvFILL(ary) + off;
- }
- RETURN;
- }
-
- static int
- sortcv(a, b)
- const void *a;
- const void *b;
- {
- SV **str1 = (SV **) a;
- SV **str2 = (SV **) b;
- I32 oldsaveix = savestack_ix;
- I32 oldscopeix = scopestack_ix;
- I32 result;
- GvSV(firstgv) = *str1;
- GvSV(secondgv) = *str2;
- stack_sp = stack_base;
- op = sortcop;
- run();
- if (stack_sp != stack_base + 1)
- croak("Sort subroutine didn't return single value");
- if (!SvNIOKp(*stack_sp))
- croak("Sort subroutine didn't return a numeric value");
- result = SvIV(*stack_sp);
- while (scopestack_ix > oldscopeix) {
- LEAVE;
- }
- leave_scope(oldsaveix);
- return result;
- }
-
- static int
- sortcmp(a, b)
- const void *a;
- const void *b;
- {
- register SV *str1 = *(SV **) a;
- register SV *str2 = *(SV **) b;
- I32 retval;
-
- if (SvCUR(str1) < SvCUR(str2)) {
- /*SUPPRESS 560*/
- if (retval = memcmp(SvPVX(str1), SvPVX(str2), SvCUR(str1)))
- return retval;
- else
- return -1;
- }
- /*SUPPRESS 560*/
- else if (retval = memcmp(SvPVX(str1), SvPVX(str2), SvCUR(str2)))
- return retval;
- else if (SvCUR(str1) == SvCUR(str2))
- return 0;
- else
- return 1;
- }
-
- PP(pp_reset)
- {
- dSP;
- char *tmps;
-
- if (MAXARG < 1)
- tmps = "";
- else
- tmps = POPp;
- sv_reset(tmps, curcop->cop_stash);
- PUSHs(&sv_yes);
- RETURN;
- }
-
- PP(pp_lineseq)
- {
- return NORMAL;
- }
-
- PP(pp_dbstate)
- {
- curcop = (COP*)op;
- TAINT_NOT; /* Each statement is presumed innocent */
- stack_sp = stack_base + cxstack[cxstack_ix].blk_oldsp;
- FREETMPS;
-
- if (op->op_private || SvIV(DBsingle) || SvIV(DBsignal) || SvIV(DBtrace))
- {
- SV **sp;
- register CV *cv;
- register CONTEXT *cx;
- I32 gimme = G_ARRAY;
- I32 hasargs;
- GV *gv;
-
- ENTER;
- SAVETMPS;
-
- gv = DBgv;
- cv = GvCV(gv);
- if (!cv)
- DIE("No DB::DB routine defined");
-
- if (CvDEPTH(cv) >= 1) /* don't do recursive DB::DB call */
- return NORMAL;
-
- SAVEI32(debug);
- SAVESPTR(stack_sp);
- debug = 0;
- hasargs = 0;
- sp = stack_sp;
-
- push_return(op->op_next);
- PUSHBLOCK(cx, CXt_SUB, sp);
- PUSHSUB(cx);
- CvDEPTH(cv)++;
- (void)SvREFCNT_inc(cv);
- SAVESPTR(curpad);
- curpad = AvARRAY((AV*)*av_fetch(CvPADLIST(cv),1,FALSE));
- RETURNOP(CvSTART(cv));
- }
- else
- return NORMAL;
- }
-
- PP(pp_scope)
- {
- return NORMAL;
- }
-
- PP(pp_enteriter)
- {
- dSP; dMARK;
- register CONTEXT *cx;
- I32 gimme = GIMME;
- SV **svp;
-
- if (op->op_targ)
- svp = &curpad[op->op_targ]; /* "my" variable */
- else
- svp = &GvSV((GV*)POPs); /* symbol table variable */
-
- ENTER;
- SAVETMPS;
- ENTER;
-
- PUSHBLOCK(cx, CXt_LOOP, SP);
- PUSHLOOP(cx, svp, MARK);
- cx->blk_loop.iterary = stack;
- cx->blk_loop.iterix = MARK - stack_base;
-
- RETURN;
- }
-
- PP(pp_enterloop)
- {
- dSP;
- register CONTEXT *cx;
- I32 gimme = GIMME;
-
- ENTER;
- SAVETMPS;
- ENTER;
-
- PUSHBLOCK(cx, CXt_LOOP, SP);
- PUSHLOOP(cx, 0, SP);
-
- RETURN;
- }
-
- PP(pp_leaveloop)
- {
- dSP;
- register CONTEXT *cx;
- I32 gimme;
- SV **newsp;
- PMOP *newpm;
- SV **mark;
-
- POPBLOCK(cx,newpm);
- mark = newsp;
- POPLOOP(cx);
- if (gimme == G_SCALAR) {
- if (op->op_private & OPpLEAVE_VOID)
- ;
- else {
- if (mark < SP)
- *++newsp = sv_mortalcopy(*SP);
- else
- *++newsp = &sv_undef;
- }
- }
- else {
- while (mark < SP)
- *++newsp = sv_mortalcopy(*++mark);
- }
- curpm = newpm; /* Don't pop $1 et al till now */
- sp = newsp;
- LEAVE;
- LEAVE;
-
- RETURN;
- }
-
- PP(pp_return)
- {
- dSP; dMARK;
- I32 cxix;
- register CONTEXT *cx;
- I32 gimme;
- SV **newsp;
- PMOP *newpm;
- I32 optype = 0;
-
- if (stack == sortstack) {
- if (cxstack_ix == sortcxix || dopoptosub(cxstack_ix) < sortcxix) {
- if (cxstack_ix > sortcxix)
- dounwind(sortcxix);
- AvARRAY(stack)[1] = *SP;
- stack_sp = stack_base + 1;
- return 0;
- }
- }
-
- cxix = dopoptosub(cxstack_ix);
- if (cxix < 0)
- DIE("Can't return outside a subroutine");
- if (cxix < cxstack_ix)
- dounwind(cxix);
-
- POPBLOCK(cx,newpm);
- switch (cx->cx_type) {
- case CXt_SUB:
- POPSUB(cx);
- break;
- case CXt_EVAL:
- POPEVAL(cx);
- if (optype == OP_REQUIRE &&
- (MARK == SP || (gimme == G_SCALAR && !SvTRUE(*SP))) )
- {
- char *name = cx->blk_eval.old_name;
- (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
- DIE("%s did not return a true value", name);
- }
- break;
- default:
- DIE("panic: return");
- break;
- }
-
- if (gimme == G_SCALAR) {
- if (MARK < SP)
- *++newsp = sv_mortalcopy(*SP);
- else
- *++newsp = &sv_undef;
- }
- else {
- while (MARK < SP)
- *++newsp = sv_mortalcopy(*++MARK);
- }
- curpm = newpm; /* Don't pop $1 et al till now */
- stack_sp = newsp;
-
- LEAVE;
- return pop_return();
- }
-
- PP(pp_last)
- {
- dSP;
- I32 cxix;
- register CONTEXT *cx;
- I32 gimme;
- I32 optype;
- OP *nextop;
- SV **newsp;
- PMOP *newpm;
- SV **mark = stack_base + cxstack[cxstack_ix].blk_oldsp;
-
- if (op->op_flags & OPf_SPECIAL) {
- cxix = dopoptoloop(cxstack_ix);
- if (cxix < 0)
- DIE("Can't \"last\" outside a block");
- }
- else {
- cxix = dopoptolabel(cPVOP->op_pv);
- if (cxix < 0)
- DIE("Label not found for \"last %s\"", cPVOP->op_pv);
- }
- if (cxix < cxstack_ix)
- dounwind(cxix);
-
- POPBLOCK(cx,newpm);
- switch (cx->cx_type) {
- case CXt_LOOP:
- POPLOOP(cx);
- nextop = cx->blk_loop.last_op->op_next;
- LEAVE;
- break;
- case CXt_EVAL:
- POPEVAL(cx);
- nextop = pop_return();
- break;
- case CXt_SUB:
- POPSUB(cx);
- nextop = pop_return();
- break;
- default:
- DIE("panic: last");
- break;
- }
-
- if (gimme == G_SCALAR) {
- if (mark < SP)
- *++newsp = sv_mortalcopy(*SP);
- else
- *++newsp = &sv_undef;
- }
- else {
- while (mark < SP)
- *++newsp = sv_mortalcopy(*++mark);
- }
- curpm = newpm; /* Don't pop $1 et al till now */
- sp = newsp;
-
- LEAVE;
- RETURNOP(nextop);
- }
-
- PP(pp_next)
- {
- I32 cxix;
- register CONTEXT *cx;
- I32 oldsave;
-
- if (op->op_flags & OPf_SPECIAL) {
- cxix = dopoptoloop(cxstack_ix);
- if (cxix < 0)
- DIE("Can't \"next\" outside a block");
- }
- else {
- cxix = dopoptolabel(cPVOP->op_pv);
- if (cxix < 0)
- DIE("Label not found for \"next %s\"", cPVOP->op_pv);
- }
- if (cxix < cxstack_ix)
- dounwind(cxix);
-
- TOPBLOCK(cx);
- oldsave = scopestack[scopestack_ix - 1];
- LEAVE_SCOPE(oldsave);
- return cx->blk_loop.next_op;
- }
-
- PP(pp_redo)
- {
- I32 cxix;
- register CONTEXT *cx;
- I32 oldsave;
-
- if (op->op_flags & OPf_SPECIAL) {
- cxix = dopoptoloop(cxstack_ix);
- if (cxix < 0)
- DIE("Can't \"redo\" outside a block");
- }
- else {
- cxix = dopoptolabel(cPVOP->op_pv);
- if (cxix < 0)
- DIE("Label not found for \"redo %s\"", cPVOP->op_pv);
- }
- if (cxix < cxstack_ix)
- dounwind(cxix);
-
- TOPBLOCK(cx);
- oldsave = scopestack[scopestack_ix - 1];
- LEAVE_SCOPE(oldsave);
- return cx->blk_loop.redo_op;
- }
-
- static OP* lastgotoprobe;
-
- static OP *
- dofindlabel(op,label,opstack)
- OP *op;
- char *label;
- OP **opstack;
- {
- OP *kid;
- OP **ops = opstack;
-
- if (op->op_type == OP_LEAVE ||
- op->op_type == OP_SCOPE ||
- op->op_type == OP_LEAVELOOP ||
- op->op_type == OP_LEAVETRY)
- *ops++ = cUNOP->op_first;
- *ops = 0;
- if (op->op_flags & OPf_KIDS) {
- /* First try all the kids at this level, since that's likeliest. */
- for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
- if ((kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) &&
- kCOP->cop_label && strEQ(kCOP->cop_label, label))
- return kid;
- }
- for (kid = cUNOP->op_first; kid; kid = kid->op_sibling) {
- if (kid == lastgotoprobe)
- continue;
- if (kid->op_type == OP_NEXTSTATE || kid->op_type == OP_DBSTATE) {
- if (ops > opstack &&
- (ops[-1]->op_type == OP_NEXTSTATE ||
- ops[-1]->op_type == OP_DBSTATE))
- *ops = kid;
- else
- *ops++ = kid;
- }
- if (op = dofindlabel(kid,label,ops))
- return op;
- }
- }
- *ops = 0;
- return 0;
- }
-
- PP(pp_dump)
- {
- return pp_goto(ARGS);
- /*NOTREACHED*/
- }
-
- PP(pp_goto)
- {
- dSP;
- OP *retop = 0;
- I32 ix;
- register CONTEXT *cx;
- OP *enterops[64];
- char *label;
- int do_dump = (op->op_type == OP_DUMP);
-
- label = 0;
- if (op->op_flags & OPf_STACKED) {
- SV *sv = POPs;
-
- /* This egregious kludge implements goto &subroutine */
- if (SvROK(sv) && SvTYPE(SvRV(sv)) == SVt_PVCV) {
- I32 cxix;
- register CONTEXT *cx;
- CV* cv = (CV*)SvRV(sv);
- SV** mark;
- I32 items = 0;
- I32 oldsave;
-
- if (!CvROOT(cv) && !CvXSUB(cv)) {
- if (CvGV(cv)) {
- SV *tmpstr = sv_newmortal();
- gv_efullname(tmpstr, CvGV(cv));
- DIE("Goto undefined subroutine &%s",SvPVX(tmpstr));
- }
- DIE("Goto undefined subroutine");
- }
-
- /* First do some returnish stuff. */
- cxix = dopoptosub(cxstack_ix);
- if (cxix < 0)
- DIE("Can't goto subroutine outside a subroutine");
- if (cxix < cxstack_ix)
- dounwind(cxix);
- TOPBLOCK(cx);
- mark = stack_sp;
- if (cx->blk_sub.hasargs) { /* put @_ back onto stack */
- AV* av = cx->blk_sub.argarray;
-
- items = AvFILL(av) + 1;
- Copy(AvARRAY(av), ++stack_sp, items, SV*);
- stack_sp += items;
- GvAV(defgv) = cx->blk_sub.savearray;
- av_clear(av);
- AvREAL_off(av);
- }
- if (!(CvDEPTH(cx->blk_sub.cv) = cx->blk_sub.olddepth))
- SvREFCNT_dec(cx->blk_sub.cv);
- oldsave = scopestack[scopestack_ix - 1];
- LEAVE_SCOPE(oldsave);
-
- /* Now do some callish stuff. */
- SAVETMPS;
- if (CvXSUB(cv)) {
- if (CvOLDSTYLE(cv)) {
- I32 (*fp3)_((int,int,int));
- while (sp > mark) {
- sp[1] = sp[0];
- sp--;
- }
- fp3 = (I32(*)_((int,int,int)))CvXSUB(cv);
- items = (*fp3)(CvXSUBANY(cv).any_i32,
- mark - stack_base + 1,
- items);
- sp = stack_base + items;
- }
- else {
- (void)(*CvXSUB(cv))(cv);
- }
- LEAVE;
- return pop_return();
- }
- else {
- AV* padlist = CvPADLIST(cv);
- SV** svp = AvARRAY(padlist);
- cx->blk_sub.cv = cv;
- cx->blk_sub.olddepth = CvDEPTH(cv);
- CvDEPTH(cv)++;
- if (CvDEPTH(cv) < 2)
- (void)SvREFCNT_inc(cv);
- else { /* save temporaries on recursion? */
- if (CvDEPTH(cv) == 100 && dowarn)
- warn("Deep recursion on subroutine \"%s\"",
- GvENAME(CvGV(cv)));
- if (CvDEPTH(cv) > AvFILL(padlist)) {
- AV *newpad = newAV();
- SV **oldpad = AvARRAY(svp[CvDEPTH(cv)-1]);
- I32 ix = AvFILL((AV*)svp[1]);
- svp = AvARRAY(svp[0]);
- for ( ;ix > 0; ix--) {
- if (svp[ix] != &sv_undef) {
- char *name = SvPVX(svp[ix]);
- if (SvFLAGS(svp[ix]) & SVf_FAKE) {
- /* outer lexical? */
- av_store(newpad, ix,
- SvREFCNT_inc(oldpad[ix]) );
- }
- else { /* our own lexical */
- if (*name == '@')
- av_store(newpad, ix, sv = (SV*)newAV());
- else if (*name == '%')
- av_store(newpad, ix, sv = (SV*)newHV());
- else
- av_store(newpad, ix, sv = NEWSV(0,0));
- SvPADMY_on(sv);
- }
- }
- else {
- av_store(newpad, ix, sv = NEWSV(0,0));
- SvPADTMP_on(sv);
- }
- }
- if (cx->blk_sub.hasargs) {
- AV* av = newAV();
- av_extend(av, 0);
- av_store(newpad, 0, (SV*)av);
- AvFLAGS(av) = AVf_REIFY;
- }
- av_store(padlist, CvDEPTH(cv), (SV*)newpad);
- AvFILL(padlist) = CvDEPTH(cv);
- svp = AvARRAY(padlist);
- }
- }
- SAVESPTR(curpad);
- curpad = AvARRAY((AV*)svp[CvDEPTH(cv)]);
- if (cx->blk_sub.hasargs) {
- AV* av = (AV*)curpad[0];
- SV** ary;
-
- cx->blk_sub.savearray = GvAV(defgv);
- cx->blk_sub.argarray = av;
- GvAV(defgv) = cx->blk_sub.argarray;
- ++mark;
-
- if (items >= AvMAX(av) + 1) {
- ary = AvALLOC(av);
- if (AvARRAY(av) != ary) {
- AvMAX(av) += AvARRAY(av) - AvALLOC(av);
- SvPVX(av) = (char*)ary;
- }
- if (items >= AvMAX(av) + 1) {
- AvMAX(av) = items - 1;
- Renew(ary,items+1,SV*);
- AvALLOC(av) = ary;
- SvPVX(av) = (char*)ary;
- }
- }
- Copy(mark,AvARRAY(av),items,SV*);
- AvFILL(av) = items - 1;
-
- while (items--) {
- if (*mark)
- SvTEMP_off(*mark);
- mark++;
- }
- }
- RETURNOP(CvSTART(cv));
- }
- }
- else
- label = SvPV(sv,na);
- }
- else if (op->op_flags & OPf_SPECIAL) {
- if (! do_dump)
- DIE("goto must have label");
- }
- else
- label = cPVOP->op_pv;
-
- if (label && *label) {
- OP *gotoprobe = 0;
-
- /* find label */
-
- lastgotoprobe = 0;
- *enterops = 0;
- for (ix = cxstack_ix; ix >= 0; ix--) {
- cx = &cxstack[ix];
- switch (cx->cx_type) {
- case CXt_SUB:
- gotoprobe = CvROOT(cx->blk_sub.cv);
- break;
- case CXt_EVAL:
- gotoprobe = eval_root; /* XXX not good for nested eval */
- break;
- case CXt_LOOP:
- gotoprobe = cx->blk_oldcop->op_sibling;
- break;
- case CXt_SUBST:
- continue;
- case CXt_BLOCK:
- if (ix)
- gotoprobe = cx->blk_oldcop->op_sibling;
- else
- gotoprobe = main_root;
- break;
- default:
- if (ix)
- DIE("panic: goto");
- else
- gotoprobe = main_root;
- break;
- }
- retop = dofindlabel(gotoprobe, label, enterops);
- if (retop)
- break;
- lastgotoprobe = gotoprobe;
- }
- if (!retop)
- DIE("Can't find label %s", label);
-
- /* pop unwanted frames */
-
- if (ix < cxstack_ix) {
- I32 oldsave;
-
- if (ix < 0)
- ix = 0;
- dounwind(ix);
- TOPBLOCK(cx);
- oldsave = scopestack[scopestack_ix];
- LEAVE_SCOPE(oldsave);
- }
-
- /* push wanted frames */
-
- if (*enterops && enterops[1]) {
- OP *oldop = op;
- for (ix = 1; enterops[ix]; ix++) {
- op = enterops[ix];
- (*op->op_ppaddr)();
- }
- op = oldop;
- }
- }
-
- if (do_dump) {
- restartop = retop;
- do_undump = TRUE;
-
- my_unexec();
-
- restartop = 0; /* hmm, must be GNU unexec().. */
- do_undump = FALSE;
- }
-
- if (stack == signalstack) {
- restartop = retop;
- longjmp(top_env, 3);
- }
-
- RETURNOP(retop);
- }
-
- PP(pp_exit)
- {
- dSP;
- I32 anum;
-
- if (MAXARG < 1)
- anum = 0;
- else
- anum = SvIVx(POPs);
- my_exit(anum);
- PUSHs(&sv_undef);
- RETURN;
- }
-
- #ifdef NOTYET
- PP(pp_nswitch)
- {
- dSP;
- double value = SvNVx(GvSV(cCOP->cop_gv));
- register I32 match = I_32(value);
-
- if (value < 0.0) {
- if (((double)match) > value)
- --match; /* was fractional--truncate other way */
- }
- match -= cCOP->uop.scop.scop_offset;
- if (match < 0)
- match = 0;
- else if (match > cCOP->uop.scop.scop_max)
- match = cCOP->uop.scop.scop_max;
- op = cCOP->uop.scop.scop_next[match];
- RETURNOP(op);
- }
-
- PP(pp_cswitch)
- {
- dSP;
- register I32 match;
-
- if (multiline)
- op = op->op_next; /* can't assume anything */
- else {
- match = *(SvPVx(GvSV(cCOP->cop_gv), na)) & 255;
- match -= cCOP->uop.scop.scop_offset;
- if (match < 0)
- match = 0;
- else if (match > cCOP->uop.scop.scop_max)
- match = cCOP->uop.scop.scop_max;
- op = cCOP->uop.scop.scop_next[match];
- }
- RETURNOP(op);
- }
- #endif
-
- /* Eval. */
-
- static void
- save_lines(array, sv)
- AV *array;
- SV *sv;
- {
- register char *s = SvPVX(sv);
- register char *send = SvPVX(sv) + SvCUR(sv);
- register char *t;
- register I32 line = 1;
-
- while (s && s < send) {
- SV *tmpstr = NEWSV(85,0);
-
- sv_upgrade(tmpstr, SVt_PVMG);
- t = strchr(s, '\n');
- if (t)
- t++;
- else
- t = send;
-
- sv_setpvn(tmpstr, s, t - s);
- av_store(array, line++, tmpstr);
- s = t;
- }
- }
-
- static OP *
- doeval(gimme)
- int gimme;
- {
- dSP;
- OP *saveop = op;
- HV *newstash;
- AV* comppadlist;
-
- in_eval = 1;
-
- /* set up a scratch pad */
-
- SAVEINT(padix);
- SAVESPTR(curpad);
- SAVESPTR(comppad);
- SAVESPTR(comppad_name);
- SAVEINT(comppad_name_fill);
- SAVEINT(min_intro_pending);
- SAVEINT(max_intro_pending);
-
- SAVESPTR(compcv);
- compcv = (CV*)NEWSV(1104,0);
- sv_upgrade((SV *)compcv, SVt_PVCV);
-
- comppad = newAV();
- comppad_name = newAV();
- comppad_name_fill = 0;
- min_intro_pending = 0;
- av_push(comppad, Nullsv);
- curpad = AvARRAY(comppad);
- padix = 0;
-
- comppadlist = newAV();
- AvREAL_off(comppadlist);
- av_store(comppadlist, 0, SvREFCNT_inc((SV*)comppad_name));
- av_store(comppadlist, 1, SvREFCNT_inc((SV*)comppad));
- CvPADLIST(compcv) = comppadlist;
-
- /* make sure we compile in the right package */
-
- newstash = curcop->cop_stash;
- if (curstash != newstash) {
- SAVESPTR(curstash);
- curstash = newstash;
- }
- SAVESPTR(beginav);
- beginav = newAV();
- SAVEFREESV(beginav);
-
- /* try to compile it */
-
- eval_root = Nullop;
- error_count = 0;
- curcop = &compiling;
- curcop->cop_arybase = 0;
- rs = "\n";
- rslen = 1;
- rschar = '\n';
- rspara = 0;
- sv_setpv(GvSV(gv_fetchpv("@",TRUE, SVt_PV)),"");
- if (yyparse() || error_count || !eval_root) {
- SV **newsp;
- I32 gimme;
- CONTEXT *cx;
- I32 optype;
-
- op = saveop;
- if (eval_root) {
- op_free(eval_root);
- eval_root = Nullop;
- }
- POPBLOCK(cx,curpm);
- POPEVAL(cx);
- pop_return();
- lex_end();
- LEAVE;
- if (optype == OP_REQUIRE)
- DIE("%s", SvPVx(GvSV(gv_fetchpv("@",TRUE, SVt_PV)), na));
- rs = nrs;
- rslen = nrslen;
- rschar = nrschar;
- rspara = (nrslen == 2);
- RETPUSHUNDEF;
- }
- rs = nrs;
- rslen = nrslen;
- rschar = nrschar;
- rspara = (nrslen == 2);
- compiling.cop_line = 0;
- SAVEFREESV(compcv);
- SAVEFREEOP(eval_root);
- if (gimme & G_ARRAY)
- list(eval_root);
- else
- scalar(eval_root);
-
- DEBUG_x(dump_eval());
-
- /* compiled okay, so do it */
-
- RETURNOP(eval_start);
- }
-
- PP(pp_require)
- {
- dSP;
- register CONTEXT *cx;
- SV *sv;
- char *name;
- char *tmpname;
- SV** svp;
- I32 gimme = G_SCALAR;
- FILE *tryrsfp = 0;
-
- sv = POPs;
- if (SvNIOK(sv) && !SvPOKp(sv)) {
- if (atof(patchlevel) + 0.000999 < SvNV(sv))
- DIE("Perl %3.3f required--this is only version %s, stopped",
- SvNV(sv),patchlevel);
- RETPUSHYES;
- }
- name = SvPV(sv, na);
- if (!*name)
- DIE("Null filename used");
- if (op->op_type == OP_REQUIRE &&
- (svp = hv_fetch(GvHVn(incgv), name, SvCUR(sv), 0)) &&
- *svp != &sv_undef)
- RETPUSHYES;
-
- /* prepare to compile file */
-
- tmpname = savepv(name);
- if (*tmpname == '/' ||
- (*tmpname == '.' &&
- (tmpname[1] == '/' ||
- (tmpname[1] == '.' && tmpname[2] == '/')))
- #ifdef VMS
- || ((*tmpname == '[' || *tmpname == '<') &&
- (tmpname[1] == '-' || tmpname[1] == ']' || tmpname[1] == '>'))
- #endif
- )
- {
- tryrsfp = fopen(tmpname,"r");
- }
- else {
- AV *ar = GvAVn(incgv);
- I32 i;
-
- for (i = 0; i <= AvFILL(ar); i++) {
- #ifdef VMS
- if (tounixpath_ts(SvPVx(*av_fetch(ar, i, TRUE), na),buf) == NULL)
- croak("Error converting file specification %s",
- SvPVx(*av_fetch(ar, i, TRUE), na));
- strcat(buf,name);
- #else
- (void)sprintf(buf, "%s/%s",
- SvPVx(*av_fetch(ar, i, TRUE), na), name);
- #endif
- tryrsfp = fopen(buf, "r");
- if (tryrsfp) {
- char *s = buf;
-
- if (*s == '.' && s[1] == '/')
- s += 2;
- Safefree(tmpname);
- tmpname = savepv(s);
- break;
- }
- }
- }
- SAVESPTR(compiling.cop_filegv);
- compiling.cop_filegv = gv_fetchfile(tmpname);
- Safefree(tmpname);
- tmpname = Nullch;
- if (!tryrsfp) {
- if (op->op_type == OP_REQUIRE) {
- sprintf(tokenbuf,"Can't locate %s in @INC", name);
- if (instr(tokenbuf,".h "))
- strcat(tokenbuf," (change .h to .ph maybe?)");
- if (instr(tokenbuf,".ph "))
- strcat(tokenbuf," (did you run h2ph?)");
- DIE("%s",tokenbuf);
- }
-
- RETPUSHUNDEF;
- }
-
- /* Assume success here to prevent recursive requirement. */
- (void)hv_store(GvHVn(incgv), name, strlen(name),
- newSVsv(GvSV(compiling.cop_filegv)), 0 );
-
- ENTER;
- SAVETMPS;
- lex_start(sv_2mortal(newSVpv("",0)));
- if (rsfp_filters){
- save_aptr(&rsfp_filters);
- rsfp_filters = NULL;
- }
-
- rsfp = tryrsfp;
- name = savepv(name);
- SAVEFREEPV(name);
- SAVEI32(hints);
- hints = 0;
-
- /* switch to eval mode */
-
- push_return(op->op_next);
- PUSHBLOCK(cx, CXt_EVAL, SP);
- PUSHEVAL(cx, name, compiling.cop_filegv);
-
- compiling.cop_line = 0;
-
- PUTBACK;
- return doeval(G_SCALAR);
- }
-
- PP(pp_dofile)
- {
- return pp_require(ARGS);
- }
-
- PP(pp_entereval)
- {
- dSP;
- register CONTEXT *cx;
- dPOPss;
- I32 gimme = GIMME;
- char tmpbuf[32];
- STRLEN len;
-
- if (!SvPV(sv,len) || !len)
- RETPUSHUNDEF;
- TAINT_PROPER("eval");
-
- ENTER;
- lex_start(sv);
- SAVETMPS;
-
- /* switch to eval mode */
-
- SAVESPTR(compiling.cop_filegv);
- sprintf(tmpbuf, "_<(eval %d)", ++evalseq);
- compiling.cop_filegv = gv_fetchfile(tmpbuf+2);
- compiling.cop_line = 1;
- SAVEDELETE(defstash, savepv(tmpbuf), strlen(tmpbuf));
- SAVEI32(hints);
- hints = op->op_targ;
-
- push_return(op->op_next);
- PUSHBLOCK(cx, CXt_EVAL, SP);
- PUSHEVAL(cx, 0, compiling.cop_filegv);
-
- /* prepare to compile string */
-
- if (perldb && curstash != debstash)
- save_lines(GvAV(compiling.cop_filegv), linestr);
- PUTBACK;
- return doeval(gimme);
- }
-
- PP(pp_leaveeval)
- {
- dSP;
- register SV **mark;
- SV **newsp;
- PMOP *newpm;
- I32 gimme;
- register CONTEXT *cx;
- OP *retop;
- I32 optype;
-
- POPBLOCK(cx,newpm);
- POPEVAL(cx);
- retop = pop_return();
-
- if (gimme == G_SCALAR) {
- if (op->op_private & OPpLEAVE_VOID)
- MARK = newsp;
- else {
- MARK = newsp + 1;
- if (MARK <= SP) {
- if (SvFLAGS(TOPs) & SVs_TEMP)
- *MARK = TOPs;
- else
- *MARK = sv_mortalcopy(TOPs);
- }
- else {
- MEXTEND(mark,0);
- *MARK = &sv_undef;
- }
- }
- SP = MARK;
- }
- else {
- for (mark = newsp + 1; mark <= SP; mark++)
- if (!(SvFLAGS(TOPs) & SVs_TEMP))
- *mark = sv_mortalcopy(*mark);
- /* in case LEAVE wipes old return values */
- }
- curpm = newpm; /* Don't pop $1 et al till now */
-
- if (optype != OP_ENTEREVAL) {
- char *name = cx->blk_eval.old_name;
-
- if (!(gimme == G_SCALAR ? SvTRUE(*sp) : sp > newsp)) {
- /* Unassume the success we assumed earlier. */
- (void)hv_delete(GvHVn(incgv), name, strlen(name), G_DISCARD);
-
- if (optype == OP_REQUIRE)
- retop = die("%s did not return a true value", name);
- }
- }
-
- lex_end();
- LEAVE;
- sv_setpv(GvSV(gv_fetchpv("@",TRUE, SVt_PV)),"");
-
- RETURNOP(retop);
- }
-
- PP(pp_entertry)
- {
- dSP;
- register CONTEXT *cx;
- I32 gimme = GIMME;
-
- ENTER;
- SAVETMPS;
-
- push_return(cLOGOP->op_other->op_next);
- PUSHBLOCK(cx, CXt_EVAL, SP);
- PUSHEVAL(cx, 0, 0);
- eval_root = op; /* Only needed so that goto works right. */
-
- in_eval = 1;
- sv_setpv(GvSV(gv_fetchpv("@",TRUE, SVt_PV)),"");
- RETURN;
- }
-
- PP(pp_leavetry)
- {
- dSP;
- register SV **mark;
- SV **newsp;
- PMOP *newpm;
- I32 gimme;
- register CONTEXT *cx;
- I32 optype;
-
- POPBLOCK(cx,newpm);
- POPEVAL(cx);
- pop_return();
-
- if (gimme == G_SCALAR) {
- if (op->op_private & OPpLEAVE_VOID)
- MARK = newsp;
- else {
- MARK = newsp + 1;
- if (MARK <= SP) {
- if (SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP))
- *MARK = TOPs;
- else
- *MARK = sv_mortalcopy(TOPs);
- }
- else {
- MEXTEND(mark,0);
- *MARK = &sv_undef;
- }
- }
- SP = MARK;
- }
- else {
- for (mark = newsp + 1; mark <= SP; mark++)
- if (!(SvFLAGS(TOPs) & (SVs_PADTMP|SVs_TEMP)))
- *mark = sv_mortalcopy(*mark);
- /* in case LEAVE wipes old return values */
- }
- curpm = newpm; /* Don't pop $1 et al till now */
-
- LEAVE;
- sv_setpv(GvSV(gv_fetchpv("@",TRUE, SVt_PV)),"");
- RETURN;
- }
-
- static void
- doparseform(sv)
- SV *sv;
- {
- STRLEN len;
- register char *s = SvPV_force(sv, len);
- register char *send = s + len;
- register char *base;
- register I32 skipspaces = 0;
- bool noblank;
- bool repeat;
- bool postspace = FALSE;
- U16 *fops;
- register U16 *fpc;
- U16 *linepc;
- register I32 arg;
- bool ischop;
-
- New(804, fops, (send - s)*3+2, U16); /* Almost certainly too long... */
- fpc = fops;
-
- if (s < send) {
- linepc = fpc;
- *fpc++ = FF_LINEMARK;
- noblank = repeat = FALSE;
- base = s;
- }
-
- while (s <= send) {
- switch (*s++) {
- default:
- skipspaces = 0;
- continue;
-
- case '~':
- if (*s == '~') {
- repeat = TRUE;
- *s = ' ';
- }
- noblank = TRUE;
- s[-1] = ' ';
- /* FALL THROUGH */
- case ' ': case '\t':
- skipspaces++;
- continue;
-
- case '\n': case 0:
- arg = s - base;
- skipspaces++;
- arg -= skipspaces;
- if (arg) {
- if (postspace) {
- *fpc++ = FF_SPACE;
- postspace = FALSE;
- }
- *fpc++ = FF_LITERAL;
- *fpc++ = arg;
- }
- if (s <= send)
- skipspaces--;
- if (skipspaces) {
- *fpc++ = FF_SKIP;
- *fpc++ = skipspaces;
- }
- skipspaces = 0;
- if (s <= send)
- *fpc++ = FF_NEWLINE;
- if (noblank) {
- *fpc++ = FF_BLANK;
- if (repeat)
- arg = fpc - linepc + 1;
- else
- arg = 0;
- *fpc++ = arg;
- }
- if (s < send) {
- linepc = fpc;
- *fpc++ = FF_LINEMARK;
- noblank = repeat = FALSE;
- base = s;
- }
- else
- s++;
- continue;
-
- case '@':
- case '^':
- ischop = s[-1] == '^';
-
- if (postspace) {
- *fpc++ = FF_SPACE;
- postspace = FALSE;
- }
- arg = (s - base) - 1;
- if (arg) {
- *fpc++ = FF_LITERAL;
- *fpc++ = arg;
- }
-
- base = s - 1;
- *fpc++ = FF_FETCH;
- if (*s == '*') {
- s++;
- *fpc++ = 0;
- *fpc++ = FF_LINEGLOB;
- }
- else if (*s == '#' || (*s == '.' && s[1] == '#')) {
- arg = ischop ? 512 : 0;
- base = s - 1;
- while (*s == '#')
- s++;
- if (*s == '.') {
- char *f;
- s++;
- f = s;
- while (*s == '#')
- s++;
- arg |= 256 + (s - f);
- }
- *fpc++ = s - base; /* fieldsize for FETCH */
- *fpc++ = FF_DECIMAL;
- *fpc++ = arg;
- }
- else {
- I32 prespace = 0;
- bool ismore = FALSE;
-
- if (*s == '>') {
- while (*++s == '>') ;
- prespace = FF_SPACE;
- }
- else if (*s == '|') {
- while (*++s == '|') ;
- prespace = FF_HALFSPACE;
- postspace = TRUE;
- }
- else {
- if (*s == '<')
- while (*++s == '<') ;
- postspace = TRUE;
- }
- if (*s == '.' && s[1] == '.' && s[2] == '.') {
- s += 3;
- ismore = TRUE;
- }
- *fpc++ = s - base; /* fieldsize for FETCH */
-
- *fpc++ = ischop ? FF_CHECKCHOP : FF_CHECKNL;
-
- if (prespace)
- *fpc++ = prespace;
- *fpc++ = FF_ITEM;
- if (ismore)
- *fpc++ = FF_MORE;
- if (ischop)
- *fpc++ = FF_CHOP;
- }
- base = s;
- skipspaces = 0;
- continue;
- }
- }
- *fpc++ = FF_END;
-
- arg = fpc - fops;
- { /* need to jump to the next word */
- int z;
- z = WORD_ALIGN - SvCUR(sv) % WORD_ALIGN;
- SvGROW(sv, SvCUR(sv) + z + arg * sizeof(U16) + 4);
- s = SvPVX(sv) + SvCUR(sv) + z;
- }
- Copy(fops, s, arg, U16);
- Safefree(fops);
- SvCOMPILED_on(sv);
- }
-
-