1449 lines
35 KiB
C
1449 lines
35 KiB
C
/* gv.c
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*
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* Copyright (c) 1991-1997, Larry Wall
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*
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* You may distribute under the terms of either the GNU General Public
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* License or the Artistic License, as specified in the README file.
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*
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*/
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/*
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* 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure
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* of your inquisitiveness, I shall spend all the rest of my days answering
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* you. What more do you want to know?'
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* 'The names of all the stars, and of all living things, and the whole
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* history of Middle-earth and Over-heaven and of the Sundering Seas,'
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* laughed Pippin.
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*/
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#include "EXTERN.h"
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#include "perl.h"
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GV *
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gv_AVadd(register GV *gv)
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{
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if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
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croak("Bad symbol for array");
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if (!GvAV(gv))
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GvAV(gv) = newAV();
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return gv;
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}
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GV *
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gv_HVadd(register GV *gv)
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{
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if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
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croak("Bad symbol for hash");
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if (!GvHV(gv))
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GvHV(gv) = newHV();
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return gv;
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}
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GV *
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gv_IOadd(register GV *gv)
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{
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if (!gv || SvTYPE((SV*)gv) != SVt_PVGV)
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croak("Bad symbol for filehandle");
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if (!GvIOp(gv))
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GvIOp(gv) = newIO();
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return gv;
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}
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GV *
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gv_fetchfile(char *name)
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{
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dTHR;
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char smallbuf[256];
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char *tmpbuf;
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STRLEN tmplen;
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GV *gv;
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tmplen = strlen(name) + 2;
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if (tmplen < sizeof smallbuf)
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tmpbuf = smallbuf;
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else
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New(603, tmpbuf, tmplen + 1, char);
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tmpbuf[0] = '_';
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tmpbuf[1] = '<';
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strcpy(tmpbuf + 2, name);
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gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE);
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if (!isGV(gv))
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gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE);
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if (tmpbuf != smallbuf)
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Safefree(tmpbuf);
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sv_setpv(GvSV(gv), name);
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if (*name == '/' && (instr(name, "/lib/") || instr(name, ".pm")))
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GvMULTI_on(gv);
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if (PERLDB_LINE)
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hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L');
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return gv;
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}
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void
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gv_init(GV *gv, HV *stash, char *name, STRLEN len, int multi)
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{
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dTHR;
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register GP *gp;
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bool doproto = SvTYPE(gv) > SVt_NULL;
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char *proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL;
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sv_upgrade((SV*)gv, SVt_PVGV);
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if (SvLEN(gv)) {
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if (proto) {
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SvPVX(gv) = NULL;
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SvLEN(gv) = 0;
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SvPOK_off(gv);
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} else
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Safefree(SvPVX(gv));
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}
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Newz(602, gp, 1, GP);
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GvGP(gv) = gp_ref(gp);
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GvSV(gv) = NEWSV(72,0);
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GvLINE(gv) = PL_curcop->cop_line;
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GvFILEGV(gv) = PL_curcop->cop_filegv;
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GvCVGEN(gv) = 0;
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GvEGV(gv) = gv;
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sv_magic((SV*)gv, (SV*)gv, '*', name, len);
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GvSTASH(gv) = (HV*)SvREFCNT_inc(stash);
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GvNAME(gv) = savepvn(name, len);
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GvNAMELEN(gv) = len;
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if (multi)
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GvMULTI_on(gv);
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if (doproto) { /* Replicate part of newSUB here. */
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SvIOK_off(gv);
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ENTER;
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start_subparse(0,0); /* Create CV in compcv. */
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GvCV(gv) = PL_compcv;
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LEAVE;
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PL_sub_generation++;
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CvGV(GvCV(gv)) = (GV*)SvREFCNT_inc(gv);
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CvFILEGV(GvCV(gv)) = PL_curcop->cop_filegv;
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CvSTASH(GvCV(gv)) = PL_curstash;
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#ifdef USE_THREADS
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CvOWNER(GvCV(gv)) = 0;
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if (!CvMUTEXP(GvCV(gv)))
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New(666, CvMUTEXP(GvCV(gv)), 1, perl_mutex);
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MUTEX_INIT(CvMUTEXP(GvCV(gv)));
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#endif /* USE_THREADS */
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if (proto) {
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sv_setpv((SV*)GvCV(gv), proto);
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Safefree(proto);
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}
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}
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}
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STATIC void
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gv_init_sv(GV *gv, I32 sv_type)
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{
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switch (sv_type) {
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case SVt_PVIO:
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(void)GvIOn(gv);
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break;
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case SVt_PVAV:
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(void)GvAVn(gv);
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break;
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case SVt_PVHV:
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(void)GvHVn(gv);
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break;
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}
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}
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GV *
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gv_fetchmeth(HV *stash, char *name, STRLEN len, I32 level)
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{
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AV* av;
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GV* topgv;
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GV* gv;
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GV** gvp;
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CV* cv;
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if (!stash)
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return 0;
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if ((level > 100) || (level < -100))
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croak("Recursive inheritance detected while looking for method '%s' in package '%s'",
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name, HvNAME(stash));
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DEBUG_o( deb("Looking for method %s in package %s\n",name,HvNAME(stash)) );
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gvp = (GV**)hv_fetch(stash, name, len, (level >= 0));
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if (!gvp)
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topgv = Nullgv;
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else {
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topgv = *gvp;
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if (SvTYPE(topgv) != SVt_PVGV)
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gv_init(topgv, stash, name, len, TRUE);
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if (cv = GvCV(topgv)) {
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/* If genuine method or valid cache entry, use it */
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if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation)
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return topgv;
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/* Stale cached entry: junk it */
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SvREFCNT_dec(cv);
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GvCV(topgv) = cv = Nullcv;
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GvCVGEN(topgv) = 0;
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}
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else if (GvCVGEN(topgv) == PL_sub_generation)
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return 0; /* cache indicates sub doesn't exist */
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}
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gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE);
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av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav;
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/* create and re-create @.*::SUPER::ISA on demand */
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if (!av || !SvMAGIC(av)) {
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char* packname = HvNAME(stash);
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STRLEN packlen = strlen(packname);
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if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) {
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HV* basestash;
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packlen -= 7;
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basestash = gv_stashpvn(packname, packlen, TRUE);
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gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE);
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if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) {
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dTHR; /* just for SvREFCNT_dec */
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gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE);
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if (!gvp || !(gv = *gvp))
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croak("Cannot create %s::ISA", HvNAME(stash));
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if (SvTYPE(gv) != SVt_PVGV)
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gv_init(gv, stash, "ISA", 3, TRUE);
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SvREFCNT_dec(GvAV(gv));
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GvAV(gv) = (AV*)SvREFCNT_inc(av);
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}
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}
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}
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if (av) {
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SV** svp = AvARRAY(av);
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/* NOTE: No support for tied ISA */
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I32 items = AvFILLp(av) + 1;
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while (items--) {
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SV* sv = *svp++;
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HV* basestash = gv_stashsv(sv, FALSE);
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if (!basestash) {
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if (PL_dowarn)
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warn("Can't locate package %s for @%s::ISA",
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SvPVX(sv), HvNAME(stash));
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continue;
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}
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gv = gv_fetchmeth(basestash, name, len,
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(level >= 0) ? level + 1 : level - 1);
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if (gv)
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goto gotcha;
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}
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}
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/* if at top level, try UNIVERSAL */
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if (level == 0 || level == -1) {
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HV* lastchance;
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if (lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE)) {
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if (gv = gv_fetchmeth(lastchance, name, len,
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(level >= 0) ? level + 1 : level - 1)) {
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gotcha:
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/*
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* Cache method in topgv if:
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* 1. topgv has no synonyms (else inheritance crosses wires)
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* 2. method isn't a stub (else AUTOLOAD fails spectacularly)
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*/
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if (topgv &&
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GvREFCNT(topgv) == 1 &&
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(cv = GvCV(gv)) &&
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(CvROOT(cv) || CvXSUB(cv)))
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{
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if (cv = GvCV(topgv))
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SvREFCNT_dec(cv);
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GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv));
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GvCVGEN(topgv) = PL_sub_generation;
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}
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return gv;
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}
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else if (topgv && GvREFCNT(topgv) == 1) {
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/* cache the fact that the method is not defined */
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GvCVGEN(topgv) = PL_sub_generation;
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}
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}
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}
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return 0;
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}
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GV *
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gv_fetchmethod(HV *stash, char *name)
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{
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return gv_fetchmethod_autoload(stash, name, TRUE);
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}
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GV *
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gv_fetchmethod_autoload(HV *stash, char *name, I32 autoload)
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{
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dTHR;
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register char *nend;
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char *nsplit = 0;
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GV* gv;
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for (nend = name; *nend; nend++) {
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if (*nend == '\'')
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nsplit = nend;
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else if (*nend == ':' && *(nend + 1) == ':')
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nsplit = ++nend;
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}
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if (nsplit) {
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char *origname = name;
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name = nsplit + 1;
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if (*nsplit == ':')
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--nsplit;
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if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) {
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/* ->SUPER::method should really be looked up in original stash */
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SV *tmpstr = sv_2mortal(newSVpvf("%s::SUPER",
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HvNAME(PL_curcop->cop_stash)));
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stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE);
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DEBUG_o( deb("Treating %s as %s::%s\n",
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origname, HvNAME(stash), name) );
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}
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else
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stash = gv_stashpvn(origname, nsplit - origname, TRUE);
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}
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gv = gv_fetchmeth(stash, name, nend - name, 0);
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if (!gv) {
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if (strEQ(name,"import"))
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gv = (GV*)&PL_sv_yes;
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else if (autoload)
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gv = gv_autoload4(stash, name, nend - name, TRUE);
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}
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else if (autoload) {
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CV* cv = GvCV(gv);
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if (!CvROOT(cv) && !CvXSUB(cv)) {
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GV* stubgv;
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GV* autogv;
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if (CvANON(cv))
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stubgv = gv;
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else {
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stubgv = CvGV(cv);
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if (GvCV(stubgv) != cv) /* orphaned import */
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stubgv = gv;
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}
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autogv = gv_autoload4(GvSTASH(stubgv),
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GvNAME(stubgv), GvNAMELEN(stubgv), TRUE);
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if (autogv)
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gv = autogv;
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}
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}
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return gv;
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}
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GV*
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gv_autoload4(HV *stash, char *name, STRLEN len, I32 method)
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{
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static char autoload[] = "AUTOLOAD";
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static STRLEN autolen = 8;
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GV* gv;
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CV* cv;
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HV* varstash;
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GV* vargv;
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SV* varsv;
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if (len == autolen && strnEQ(name, autoload, autolen))
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return Nullgv;
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if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE)))
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return Nullgv;
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cv = GvCV(gv);
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/*
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* Inheriting AUTOLOAD for non-methods works ... for now.
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*/
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if (PL_dowarn && !method && (GvCVGEN(gv) || GvSTASH(gv) != stash))
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warn(
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"Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated",
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HvNAME(stash), (int)len, name);
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/*
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* Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name.
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* The subroutine's original name may not be "AUTOLOAD", so we don't
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* use that, but for lack of anything better we will use the sub's
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* original package to look up $AUTOLOAD.
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*/
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varstash = GvSTASH(CvGV(cv));
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vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE);
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if (!isGV(vargv))
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gv_init(vargv, varstash, autoload, autolen, FALSE);
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varsv = GvSV(vargv);
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sv_setpv(varsv, HvNAME(stash));
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sv_catpvn(varsv, "::", 2);
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sv_catpvn(varsv, name, len);
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SvTAINTED_off(varsv);
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return gv;
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}
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HV*
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gv_stashpv(char *name, I32 create)
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{
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return gv_stashpvn(name, strlen(name), create);
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}
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HV*
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gv_stashpvn(char *name, U32 namelen, I32 create)
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{
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char smallbuf[256];
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char *tmpbuf;
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HV *stash;
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GV *tmpgv;
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if (namelen + 3 < sizeof smallbuf)
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tmpbuf = smallbuf;
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else
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New(606, tmpbuf, namelen + 3, char);
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Copy(name,tmpbuf,namelen,char);
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tmpbuf[namelen++] = ':';
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tmpbuf[namelen++] = ':';
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tmpbuf[namelen] = '\0';
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tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV);
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if (tmpbuf != smallbuf)
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Safefree(tmpbuf);
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if (!tmpgv)
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return 0;
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if (!GvHV(tmpgv))
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GvHV(tmpgv) = newHV();
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stash = GvHV(tmpgv);
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if (!HvNAME(stash))
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HvNAME(stash) = savepv(name);
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return stash;
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}
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HV*
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gv_stashsv(SV *sv, I32 create)
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{
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register char *ptr;
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STRLEN len;
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ptr = SvPV(sv,len);
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return gv_stashpvn(ptr, len, create);
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}
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|
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GV *
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gv_fetchpv(char *nambeg, I32 add, I32 sv_type)
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{
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dTHR;
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register char *name = nambeg;
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register GV *gv = 0;
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GV**gvp;
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I32 len;
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register char *namend;
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HV *stash = 0;
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U32 add_gvflags = 0;
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|
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if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */
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name++;
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for (namend = name; *namend; namend++) {
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if ((*namend == '\'' && namend[1]) ||
|
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(*namend == ':' && namend[1] == ':'))
|
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{
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if (!stash)
|
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stash = PL_defstash;
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if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */
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return Nullgv;
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|
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len = namend - name;
|
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if (len > 0) {
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char smallbuf[256];
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char *tmpbuf;
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|
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if (len + 3 < sizeof smallbuf)
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tmpbuf = smallbuf;
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else
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New(601, tmpbuf, len+3, char);
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Copy(name, tmpbuf, len, char);
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tmpbuf[len++] = ':';
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tmpbuf[len++] = ':';
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tmpbuf[len] = '\0';
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gvp = (GV**)hv_fetch(stash,tmpbuf,len,add);
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gv = gvp ? *gvp : Nullgv;
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if (gv && gv != (GV*)&PL_sv_undef) {
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if (SvTYPE(gv) != SVt_PVGV)
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gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI));
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else
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GvMULTI_on(gv);
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}
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if (tmpbuf != smallbuf)
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Safefree(tmpbuf);
|
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if (!gv || gv == (GV*)&PL_sv_undef)
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return Nullgv;
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|
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if (!(stash = GvHV(gv)))
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stash = GvHV(gv) = newHV();
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|
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if (!HvNAME(stash))
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HvNAME(stash) = savepvn(nambeg, namend - nambeg);
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}
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|
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if (*namend == ':')
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namend++;
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namend++;
|
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name = namend;
|
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if (!*name)
|
|
return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE);
|
|
}
|
|
}
|
|
len = namend - name;
|
|
if (!len)
|
|
len = 1;
|
|
|
|
/* No stash in name, so see how we can default */
|
|
|
|
if (!stash) {
|
|
if (isIDFIRST(*name)) {
|
|
bool global = FALSE;
|
|
|
|
if (isUPPER(*name)) {
|
|
if (*name == 'S' && (
|
|
strEQ(name, "SIG") ||
|
|
strEQ(name, "STDIN") ||
|
|
strEQ(name, "STDOUT") ||
|
|
strEQ(name, "STDERR")))
|
|
global = TRUE;
|
|
else if (*name == 'I' && strEQ(name, "INC"))
|
|
global = TRUE;
|
|
else if (*name == 'E' && strEQ(name, "ENV"))
|
|
global = TRUE;
|
|
else if (*name == 'A' && (
|
|
strEQ(name, "ARGV") ||
|
|
strEQ(name, "ARGVOUT")))
|
|
global = TRUE;
|
|
}
|
|
else if (*name == '_' && !name[1])
|
|
global = TRUE;
|
|
|
|
if (global)
|
|
stash = PL_defstash;
|
|
else if ((COP*)PL_curcop == &PL_compiling) {
|
|
stash = PL_curstash;
|
|
if (add && (PL_hints & HINT_STRICT_VARS) &&
|
|
sv_type != SVt_PVCV &&
|
|
sv_type != SVt_PVGV &&
|
|
sv_type != SVt_PVFM &&
|
|
sv_type != SVt_PVIO &&
|
|
!(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) )
|
|
{
|
|
gvp = (GV**)hv_fetch(stash,name,len,0);
|
|
if (!gvp ||
|
|
*gvp == (GV*)&PL_sv_undef ||
|
|
SvTYPE(*gvp) != SVt_PVGV)
|
|
{
|
|
stash = 0;
|
|
}
|
|
else if (sv_type == SVt_PV && !GvIMPORTED_SV(*gvp) ||
|
|
sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp) ||
|
|
sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp) )
|
|
{
|
|
warn("Variable \"%c%s\" is not imported",
|
|
sv_type == SVt_PVAV ? '@' :
|
|
sv_type == SVt_PVHV ? '%' : '$',
|
|
name);
|
|
if (GvCVu(*gvp))
|
|
warn("(Did you mean &%s instead?)\n", name);
|
|
stash = 0;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
stash = PL_curcop->cop_stash;
|
|
}
|
|
else
|
|
stash = PL_defstash;
|
|
}
|
|
|
|
/* By this point we should have a stash and a name */
|
|
|
|
if (!stash) {
|
|
if (!add)
|
|
return Nullgv;
|
|
if (add & ~GV_ADDMULTI) {
|
|
char sv_type_char = ((sv_type == SVt_PV) ? '$'
|
|
: (sv_type == SVt_PVAV) ? '@'
|
|
: (sv_type == SVt_PVHV) ? '%'
|
|
: 0);
|
|
if (sv_type_char)
|
|
warn("Global symbol \"%c%s\" requires explicit package name",
|
|
sv_type_char, name);
|
|
else
|
|
warn("Global symbol \"%s\" requires explicit package name",
|
|
name);
|
|
}
|
|
++PL_error_count;
|
|
stash = PL_curstash ? PL_curstash : PL_defstash; /* avoid core dumps */
|
|
add_gvflags = ((sv_type == SVt_PV) ? GVf_IMPORTED_SV
|
|
: (sv_type == SVt_PVAV) ? GVf_IMPORTED_AV
|
|
: (sv_type == SVt_PVHV) ? GVf_IMPORTED_HV
|
|
: 0);
|
|
}
|
|
|
|
if (!SvREFCNT(stash)) /* symbol table under destruction */
|
|
return Nullgv;
|
|
|
|
gvp = (GV**)hv_fetch(stash,name,len,add);
|
|
if (!gvp || *gvp == (GV*)&PL_sv_undef)
|
|
return Nullgv;
|
|
gv = *gvp;
|
|
if (SvTYPE(gv) == SVt_PVGV) {
|
|
if (add) {
|
|
GvMULTI_on(gv);
|
|
gv_init_sv(gv, sv_type);
|
|
}
|
|
return gv;
|
|
} else if (add & GV_NOINIT) {
|
|
return gv;
|
|
}
|
|
|
|
/* Adding a new symbol */
|
|
|
|
if (add & GV_ADDWARN)
|
|
warn("Had to create %s unexpectedly", nambeg);
|
|
gv_init(gv, stash, name, len, add & GV_ADDMULTI);
|
|
gv_init_sv(gv, sv_type);
|
|
GvFLAGS(gv) |= add_gvflags;
|
|
|
|
/* set up magic where warranted */
|
|
switch (*name) {
|
|
case 'A':
|
|
if (strEQ(name, "ARGV")) {
|
|
IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START;
|
|
}
|
|
break;
|
|
|
|
case 'a':
|
|
case 'b':
|
|
if (len == 1)
|
|
GvMULTI_on(gv);
|
|
break;
|
|
case 'E':
|
|
if (strnEQ(name, "EXPORT", 6))
|
|
GvMULTI_on(gv);
|
|
break;
|
|
case 'I':
|
|
if (strEQ(name, "ISA")) {
|
|
AV* av = GvAVn(gv);
|
|
GvMULTI_on(gv);
|
|
sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0);
|
|
/* NOTE: No support for tied ISA */
|
|
if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA")
|
|
&& AvFILLp(av) == -1)
|
|
{
|
|
char *pname;
|
|
av_push(av, newSVpv(pname = "NDBM_File",0));
|
|
gv_stashpvn(pname, 9, TRUE);
|
|
av_push(av, newSVpv(pname = "DB_File",0));
|
|
gv_stashpvn(pname, 7, TRUE);
|
|
av_push(av, newSVpv(pname = "GDBM_File",0));
|
|
gv_stashpvn(pname, 9, TRUE);
|
|
av_push(av, newSVpv(pname = "SDBM_File",0));
|
|
gv_stashpvn(pname, 9, TRUE);
|
|
av_push(av, newSVpv(pname = "ODBM_File",0));
|
|
gv_stashpvn(pname, 9, TRUE);
|
|
}
|
|
}
|
|
break;
|
|
#ifdef OVERLOAD
|
|
case 'O':
|
|
if (strEQ(name, "OVERLOAD")) {
|
|
HV* hv = GvHVn(gv);
|
|
GvMULTI_on(gv);
|
|
hv_magic(hv, gv, 'A');
|
|
}
|
|
break;
|
|
#endif /* OVERLOAD */
|
|
case 'S':
|
|
if (strEQ(name, "SIG")) {
|
|
HV *hv;
|
|
I32 i;
|
|
PL_siggv = gv;
|
|
GvMULTI_on(PL_siggv);
|
|
hv = GvHVn(PL_siggv);
|
|
hv_magic(hv, PL_siggv, 'S');
|
|
for(i=1;sig_name[i];i++) {
|
|
SV ** init;
|
|
init=hv_fetch(hv,sig_name[i],strlen(sig_name[i]),1);
|
|
if(init)
|
|
sv_setsv(*init,&PL_sv_undef);
|
|
psig_ptr[i] = 0;
|
|
psig_name[i] = 0;
|
|
}
|
|
}
|
|
break;
|
|
|
|
case '&':
|
|
if (len > 1)
|
|
break;
|
|
PL_ampergv = gv;
|
|
PL_sawampersand = TRUE;
|
|
goto ro_magicalize;
|
|
|
|
case '`':
|
|
if (len > 1)
|
|
break;
|
|
PL_leftgv = gv;
|
|
PL_sawampersand = TRUE;
|
|
goto ro_magicalize;
|
|
|
|
case '\'':
|
|
if (len > 1)
|
|
break;
|
|
PL_rightgv = gv;
|
|
PL_sawampersand = TRUE;
|
|
goto ro_magicalize;
|
|
|
|
case ':':
|
|
if (len > 1)
|
|
break;
|
|
sv_setpv(GvSV(gv),PL_chopset);
|
|
goto magicalize;
|
|
|
|
case '?':
|
|
if (len > 1)
|
|
break;
|
|
#ifdef COMPLEX_STATUS
|
|
sv_upgrade(GvSV(gv), SVt_PVLV);
|
|
#endif
|
|
goto magicalize;
|
|
|
|
case '!':
|
|
if (len > 1)
|
|
break;
|
|
if (sv_type > SVt_PV && PL_curcop != &PL_compiling) {
|
|
HV* stash = gv_stashpvn("Errno",5,FALSE);
|
|
if(!stash || !(gv_fetchmethod(stash, "TIEHASH"))) {
|
|
dSP;
|
|
PUTBACK;
|
|
perl_require_pv("Errno.pm");
|
|
SPAGAIN;
|
|
stash = gv_stashpvn("Errno",5,FALSE);
|
|
if (!stash || !(gv_fetchmethod(stash, "TIEHASH")))
|
|
croak("Can't use %%! because Errno.pm is not available");
|
|
}
|
|
}
|
|
goto magicalize;
|
|
case '#':
|
|
case '*':
|
|
if (PL_dowarn && len == 1 && sv_type == SVt_PV)
|
|
warn("Use of $%s is deprecated", name);
|
|
/* FALL THROUGH */
|
|
case '[':
|
|
case '^':
|
|
case '~':
|
|
case '=':
|
|
case '-':
|
|
case '%':
|
|
case '.':
|
|
case '(':
|
|
case ')':
|
|
case '<':
|
|
case '>':
|
|
case ',':
|
|
case '\\':
|
|
case '/':
|
|
case '|':
|
|
case '\001':
|
|
case '\004':
|
|
case '\005':
|
|
case '\006':
|
|
case '\010':
|
|
case '\011': /* NOT \t in EBCDIC */
|
|
case '\017':
|
|
case '\020':
|
|
case '\024':
|
|
case '\027':
|
|
if (len > 1)
|
|
break;
|
|
goto magicalize;
|
|
|
|
case '+':
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
case '8':
|
|
case '9':
|
|
case '\023':
|
|
ro_magicalize:
|
|
SvREADONLY_on(GvSV(gv));
|
|
magicalize:
|
|
sv_magic(GvSV(gv), (SV*)gv, 0, name, len);
|
|
break;
|
|
|
|
case '\014':
|
|
if (len > 1)
|
|
break;
|
|
sv_setpv(GvSV(gv),"\f");
|
|
PL_formfeed = GvSV(gv);
|
|
break;
|
|
case ';':
|
|
if (len > 1)
|
|
break;
|
|
sv_setpv(GvSV(gv),"\034");
|
|
break;
|
|
case ']':
|
|
if (len == 1) {
|
|
SV *sv = GvSV(gv);
|
|
sv_upgrade(sv, SVt_PVNV);
|
|
sv_setpv(sv, PL_patchlevel);
|
|
(void)sv_2nv(sv);
|
|
SvREADONLY_on(sv);
|
|
}
|
|
break;
|
|
}
|
|
return gv;
|
|
}
|
|
|
|
void
|
|
gv_fullname3(SV *sv, GV *gv, char *prefix)
|
|
{
|
|
HV *hv = GvSTASH(gv);
|
|
if (!hv) {
|
|
SvOK_off(sv);
|
|
return;
|
|
}
|
|
sv_setpv(sv, prefix ? prefix : "");
|
|
sv_catpv(sv,HvNAME(hv));
|
|
sv_catpvn(sv,"::", 2);
|
|
sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv));
|
|
}
|
|
|
|
void
|
|
gv_efullname3(SV *sv, GV *gv, char *prefix)
|
|
{
|
|
GV *egv = GvEGV(gv);
|
|
if (!egv)
|
|
egv = gv;
|
|
gv_fullname3(sv, egv, prefix);
|
|
}
|
|
|
|
/* XXX compatibility with versions <= 5.003. */
|
|
void
|
|
gv_fullname(SV *sv, GV *gv)
|
|
{
|
|
gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : "");
|
|
}
|
|
|
|
/* XXX compatibility with versions <= 5.003. */
|
|
void
|
|
gv_efullname(SV *sv, GV *gv)
|
|
{
|
|
gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : "");
|
|
}
|
|
|
|
IO *
|
|
newIO(void)
|
|
{
|
|
dTHR;
|
|
IO *io;
|
|
GV *iogv;
|
|
|
|
io = (IO*)NEWSV(0,0);
|
|
sv_upgrade((SV *)io,SVt_PVIO);
|
|
SvREFCNT(io) = 1;
|
|
SvOBJECT_on(io);
|
|
iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV);
|
|
if (!iogv)
|
|
iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV);
|
|
SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv));
|
|
return io;
|
|
}
|
|
|
|
void
|
|
gv_check(HV *stash)
|
|
{
|
|
dTHR;
|
|
register HE *entry;
|
|
register I32 i;
|
|
register GV *gv;
|
|
HV *hv;
|
|
GV *filegv;
|
|
|
|
if (!HvARRAY(stash))
|
|
return;
|
|
for (i = 0; i <= (I32) HvMAX(stash); i++) {
|
|
for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) {
|
|
if (HeKEY(entry)[HeKLEN(entry)-1] == ':' &&
|
|
(gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv))
|
|
{
|
|
if (hv != PL_defstash)
|
|
gv_check(hv); /* nested package */
|
|
}
|
|
else if (isALPHA(*HeKEY(entry))) {
|
|
gv = (GV*)HeVAL(entry);
|
|
if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv))
|
|
continue;
|
|
PL_curcop->cop_line = GvLINE(gv);
|
|
filegv = GvFILEGV(gv);
|
|
PL_curcop->cop_filegv = filegv;
|
|
if (filegv && GvMULTI(filegv)) /* Filename began with slash */
|
|
continue;
|
|
warn("Name \"%s::%s\" used only once: possible typo",
|
|
HvNAME(stash), GvNAME(gv));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
GV *
|
|
newGVgen(char *pack)
|
|
{
|
|
return gv_fetchpv(form("%s::_GEN_%ld", pack, (long)PL_gensym++),
|
|
TRUE, SVt_PVGV);
|
|
}
|
|
|
|
/* hopefully this is only called on local symbol table entries */
|
|
|
|
GP*
|
|
gp_ref(GP *gp)
|
|
{
|
|
gp->gp_refcnt++;
|
|
if (gp->gp_cv) {
|
|
if (gp->gp_cvgen) {
|
|
/* multi-named GPs cannot be used for method cache */
|
|
SvREFCNT_dec(gp->gp_cv);
|
|
gp->gp_cv = Nullcv;
|
|
gp->gp_cvgen = 0;
|
|
}
|
|
else {
|
|
/* Adding a new name to a subroutine invalidates method cache */
|
|
PL_sub_generation++;
|
|
}
|
|
}
|
|
return gp;
|
|
}
|
|
|
|
void
|
|
gp_free(GV *gv)
|
|
{
|
|
GP* gp;
|
|
CV* cv;
|
|
|
|
if (!gv || !(gp = GvGP(gv)))
|
|
return;
|
|
if (gp->gp_refcnt == 0) {
|
|
warn("Attempt to free unreferenced glob pointers");
|
|
return;
|
|
}
|
|
if (gp->gp_cv) {
|
|
/* Deleting the name of a subroutine invalidates method cache */
|
|
PL_sub_generation++;
|
|
}
|
|
if (--gp->gp_refcnt > 0) {
|
|
if (gp->gp_egv == gv)
|
|
gp->gp_egv = 0;
|
|
return;
|
|
}
|
|
|
|
SvREFCNT_dec(gp->gp_sv);
|
|
SvREFCNT_dec(gp->gp_av);
|
|
SvREFCNT_dec(gp->gp_hv);
|
|
SvREFCNT_dec(gp->gp_io);
|
|
SvREFCNT_dec(gp->gp_cv);
|
|
SvREFCNT_dec(gp->gp_form);
|
|
|
|
Safefree(gp);
|
|
GvGP(gv) = 0;
|
|
}
|
|
|
|
#if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286))
|
|
#define MICROPORT
|
|
#endif
|
|
|
|
#ifdef MICROPORT /* Microport 2.4 hack */
|
|
AV *GvAVn(gv)
|
|
register GV *gv;
|
|
{
|
|
if (GvGP(gv)->gp_av)
|
|
return GvGP(gv)->gp_av;
|
|
else
|
|
return GvGP(gv_AVadd(gv))->gp_av;
|
|
}
|
|
|
|
HV *GvHVn(gv)
|
|
register GV *gv;
|
|
{
|
|
if (GvGP(gv)->gp_hv)
|
|
return GvGP(gv)->gp_hv;
|
|
else
|
|
return GvGP(gv_HVadd(gv))->gp_hv;
|
|
}
|
|
#endif /* Microport 2.4 hack */
|
|
|
|
#ifdef OVERLOAD
|
|
/* Updates and caches the CV's */
|
|
|
|
bool
|
|
Gv_AMupdate(HV *stash)
|
|
{
|
|
dTHR;
|
|
GV** gvp;
|
|
HV* hv;
|
|
GV* gv;
|
|
CV* cv;
|
|
MAGIC* mg=mg_find((SV*)stash,'c');
|
|
AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL;
|
|
AMT amt;
|
|
|
|
if (mg && amtp->was_ok_am == PL_amagic_generation
|
|
&& amtp->was_ok_sub == PL_sub_generation)
|
|
return AMT_AMAGIC(amtp);
|
|
if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */
|
|
int i;
|
|
for (i=1; i<NofAMmeth; i++) {
|
|
if (amtp->table[i]) {
|
|
SvREFCNT_dec(amtp->table[i]);
|
|
}
|
|
}
|
|
}
|
|
sv_unmagic((SV*)stash, 'c');
|
|
|
|
DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) );
|
|
|
|
amt.was_ok_am = PL_amagic_generation;
|
|
amt.was_ok_sub = PL_sub_generation;
|
|
amt.fallback = AMGfallNO;
|
|
amt.flags = 0;
|
|
|
|
#ifdef OVERLOAD_VIA_HASH
|
|
gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */
|
|
if (gvp && ((gv = *gvp) != (GV*)&PL_sv_undef && (hv = GvHV(gv)))) {
|
|
int filled=0;
|
|
int i;
|
|
char *cp;
|
|
SV* sv;
|
|
SV** svp;
|
|
|
|
/* Work with "fallback" key, which we assume to be first in AMG_names */
|
|
|
|
if (( cp = (char *)AMG_names[0] ) &&
|
|
(svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) {
|
|
if (SvTRUE(sv)) amt.fallback=AMGfallYES;
|
|
else if (SvOK(sv)) amt.fallback=AMGfallNEVER;
|
|
}
|
|
for (i = 1; i < NofAMmeth; i++) {
|
|
cv = 0;
|
|
cp = (char *)AMG_names[i];
|
|
|
|
svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE);
|
|
if (svp && ((sv = *svp) != &PL_sv_undef)) {
|
|
switch (SvTYPE(sv)) {
|
|
default:
|
|
if (!SvROK(sv)) {
|
|
if (!SvOK(sv)) break;
|
|
gv = gv_fetchmethod(stash, SvPV(sv, PL_na));
|
|
if (gv) cv = GvCV(gv);
|
|
break;
|
|
}
|
|
cv = (CV*)SvRV(sv);
|
|
if (SvTYPE(cv) == SVt_PVCV)
|
|
break;
|
|
/* FALL THROUGH */
|
|
case SVt_PVHV:
|
|
case SVt_PVAV:
|
|
croak("Not a subroutine reference in overload table");
|
|
return FALSE;
|
|
case SVt_PVCV:
|
|
cv = (CV*)sv;
|
|
break;
|
|
case SVt_PVGV:
|
|
if (!(cv = GvCVu((GV*)sv)))
|
|
cv = sv_2cv(sv, &stash, &gv, TRUE);
|
|
break;
|
|
}
|
|
if (cv) filled=1;
|
|
else {
|
|
croak("Method for operation %s not found in package %.256s during blessing\n",
|
|
cp,HvNAME(stash));
|
|
return FALSE;
|
|
}
|
|
}
|
|
#else
|
|
{
|
|
int filled = 0;
|
|
int i;
|
|
const char *cp;
|
|
SV* sv = NULL;
|
|
SV** svp;
|
|
|
|
/* Work with "fallback" key, which we assume to be first in AMG_names */
|
|
|
|
if ( cp = AMG_names[0] ) {
|
|
/* Try to find via inheritance. */
|
|
gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */
|
|
if (gv) sv = GvSV(gv);
|
|
|
|
if (!gv) goto no_table;
|
|
else if (SvTRUE(sv)) amt.fallback=AMGfallYES;
|
|
else if (SvOK(sv)) amt.fallback=AMGfallNEVER;
|
|
}
|
|
|
|
for (i = 1; i < NofAMmeth; i++) {
|
|
SV *cookie = sv_2mortal(newSVpvf("(%s", cp = AMG_names[i]));
|
|
DEBUG_o( deb("Checking overloading of `%s' in package `%.256s'\n",
|
|
cp, HvNAME(stash)) );
|
|
/* don't fill the cache while looking up! */
|
|
gv = gv_fetchmeth(stash, SvPVX(cookie), SvCUR(cookie), -1);
|
|
cv = 0;
|
|
if(gv && (cv = GvCV(gv))) {
|
|
if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil")
|
|
&& strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) {
|
|
/* GvSV contains the name of the method. */
|
|
GV *ngv;
|
|
|
|
DEBUG_o( deb("Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n",
|
|
SvPV(GvSV(gv), PL_na), cp, HvNAME(stash)) );
|
|
if (!SvPOK(GvSV(gv))
|
|
|| !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)),
|
|
FALSE)))
|
|
{
|
|
/* Can be an import stub (created by `can'). */
|
|
if (GvCVGEN(gv)) {
|
|
croak("Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'",
|
|
(SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ),
|
|
cp, HvNAME(stash));
|
|
} else
|
|
croak("Cannot resolve method `%.256s' overloading `%s' in package `%.256s'",
|
|
(SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ),
|
|
cp, HvNAME(stash));
|
|
}
|
|
cv = GvCV(gv = ngv);
|
|
}
|
|
DEBUG_o( deb("Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n",
|
|
cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))),
|
|
GvNAME(CvGV(cv))) );
|
|
filled = 1;
|
|
}
|
|
#endif
|
|
amt.table[i]=(CV*)SvREFCNT_inc(cv);
|
|
}
|
|
if (filled) {
|
|
AMT_AMAGIC_on(&amt);
|
|
sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT));
|
|
return TRUE;
|
|
}
|
|
}
|
|
/* Here we have no table: */
|
|
no_table:
|
|
AMT_AMAGIC_off(&amt);
|
|
sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS));
|
|
return FALSE;
|
|
}
|
|
|
|
SV*
|
|
amagic_call(SV *left, SV *right, int method, int flags)
|
|
{
|
|
dTHR;
|
|
MAGIC *mg;
|
|
CV *cv;
|
|
CV **cvp=NULL, **ocvp=NULL;
|
|
AMT *amtp, *oamtp;
|
|
int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0;
|
|
int postpr = 0, force_cpy = 0, assignshift = assign ? 1 : 0;
|
|
HV* stash;
|
|
if (!(AMGf_noleft & flags) && SvAMAGIC(left)
|
|
&& (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c'))
|
|
&& (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
|
|
? (oamtp = amtp = (AMT*)mg->mg_ptr)->table
|
|
: (CV **) NULL))
|
|
&& ((cv = cvp[off=method+assignshift])
|
|
|| (assign && amtp->fallback > AMGfallNEVER && /* fallback to
|
|
* usual method */
|
|
(fl = 1, cv = cvp[off=method])))) {
|
|
lr = -1; /* Call method for left argument */
|
|
} else {
|
|
if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) {
|
|
int logic;
|
|
|
|
/* look for substituted methods */
|
|
/* In all the covered cases we should be called with assign==0. */
|
|
switch (method) {
|
|
case inc_amg:
|
|
force_cpy = 1;
|
|
if ((cv = cvp[off=add_ass_amg])
|
|
|| ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) {
|
|
right = &PL_sv_yes; lr = -1; assign = 1;
|
|
}
|
|
break;
|
|
case dec_amg:
|
|
force_cpy = 1;
|
|
if ((cv = cvp[off = subtr_ass_amg])
|
|
|| ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) {
|
|
right = &PL_sv_yes; lr = -1; assign = 1;
|
|
}
|
|
break;
|
|
case bool__amg:
|
|
(void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg]));
|
|
break;
|
|
case numer_amg:
|
|
(void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg]));
|
|
break;
|
|
case string_amg:
|
|
(void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg]));
|
|
break;
|
|
case not_amg:
|
|
(void)((cv = cvp[off=bool__amg])
|
|
|| (cv = cvp[off=numer_amg])
|
|
|| (cv = cvp[off=string_amg]));
|
|
postpr = 1;
|
|
break;
|
|
case copy_amg:
|
|
{
|
|
/*
|
|
* SV* ref causes confusion with the interpreter variable of
|
|
* the same name
|
|
*/
|
|
SV* tmpRef=SvRV(left);
|
|
if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) {
|
|
/*
|
|
* Just to be extra cautious. Maybe in some
|
|
* additional cases sv_setsv is safe, too.
|
|
*/
|
|
SV* newref = newSVsv(tmpRef);
|
|
SvOBJECT_on(newref);
|
|
SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef));
|
|
return newref;
|
|
}
|
|
}
|
|
break;
|
|
case abs_amg:
|
|
if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg])
|
|
&& ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) {
|
|
SV* nullsv=sv_2mortal(newSViv(0));
|
|
if (off1==lt_amg) {
|
|
SV* lessp = amagic_call(left,nullsv,
|
|
lt_amg,AMGf_noright);
|
|
logic = SvTRUE(lessp);
|
|
} else {
|
|
SV* lessp = amagic_call(left,nullsv,
|
|
ncmp_amg,AMGf_noright);
|
|
logic = (SvNV(lessp) < 0);
|
|
}
|
|
if (logic) {
|
|
if (off==subtr_amg) {
|
|
right = left;
|
|
left = nullsv;
|
|
lr = 1;
|
|
}
|
|
} else {
|
|
return left;
|
|
}
|
|
}
|
|
break;
|
|
case neg_amg:
|
|
if (cv = cvp[off=subtr_amg]) {
|
|
right = left;
|
|
left = sv_2mortal(newSViv(0));
|
|
lr = 1;
|
|
}
|
|
break;
|
|
default:
|
|
goto not_found;
|
|
}
|
|
if (!cv) goto not_found;
|
|
} else if (!(AMGf_noright & flags) && SvAMAGIC(right)
|
|
&& (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c'))
|
|
&& (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr)
|
|
? (amtp = (AMT*)mg->mg_ptr)->table
|
|
: (CV **) NULL))
|
|
&& (cv = cvp[off=method])) { /* Method for right
|
|
* argument found */
|
|
lr=1;
|
|
} else if (((ocvp && oamtp->fallback > AMGfallNEVER
|
|
&& (cvp=ocvp) && (lr = -1))
|
|
|| (cvp && amtp->fallback > AMGfallNEVER && (lr=1)))
|
|
&& !(flags & AMGf_unary)) {
|
|
/* We look for substitution for
|
|
* comparison operations and
|
|
* concatenation */
|
|
if (method==concat_amg || method==concat_ass_amg
|
|
|| method==repeat_amg || method==repeat_ass_amg) {
|
|
return NULL; /* Delegate operation to string conversion */
|
|
}
|
|
off = -1;
|
|
switch (method) {
|
|
case lt_amg:
|
|
case le_amg:
|
|
case gt_amg:
|
|
case ge_amg:
|
|
case eq_amg:
|
|
case ne_amg:
|
|
postpr = 1; off=ncmp_amg; break;
|
|
case slt_amg:
|
|
case sle_amg:
|
|
case sgt_amg:
|
|
case sge_amg:
|
|
case seq_amg:
|
|
case sne_amg:
|
|
postpr = 1; off=scmp_amg; break;
|
|
}
|
|
if (off != -1) cv = cvp[off];
|
|
if (!cv) {
|
|
goto not_found;
|
|
}
|
|
} else {
|
|
not_found: /* No method found, either report or croak */
|
|
if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */
|
|
notfound = 1; lr = -1;
|
|
} else if (cvp && (cv=cvp[nomethod_amg])) {
|
|
notfound = 1; lr = 1;
|
|
} else {
|
|
SV *msg;
|
|
if (off==-1) off=method;
|
|
msg = sv_2mortal(newSVpvf(
|
|
"Operation `%s': no method found,%sargument %s%s%s%s",
|
|
AMG_names[method + assignshift],
|
|
(flags & AMGf_unary ? " " : "\n\tleft "),
|
|
SvAMAGIC(left)?
|
|
"in overloaded package ":
|
|
"has no overloaded magic",
|
|
SvAMAGIC(left)?
|
|
HvNAME(SvSTASH(SvRV(left))):
|
|
"",
|
|
SvAMAGIC(right)?
|
|
",\n\tright argument in overloaded package ":
|
|
(flags & AMGf_unary
|
|
? ""
|
|
: ",\n\tright argument has no overloaded magic"),
|
|
SvAMAGIC(right)?
|
|
HvNAME(SvSTASH(SvRV(right))):
|
|
""));
|
|
if (amtp && amtp->fallback >= AMGfallYES) {
|
|
DEBUG_o( deb("%s", SvPVX(msg)) );
|
|
} else {
|
|
croak("%_", msg);
|
|
}
|
|
return NULL;
|
|
}
|
|
force_cpy = force_cpy || assign;
|
|
}
|
|
}
|
|
if (!notfound) {
|
|
DEBUG_o( deb(
|
|
"Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n",
|
|
AMG_names[off],
|
|
method+assignshift==off? "" :
|
|
" (initially `",
|
|
method+assignshift==off? "" :
|
|
AMG_names[method+assignshift],
|
|
method+assignshift==off? "" : "')",
|
|
flags & AMGf_unary? "" :
|
|
lr==1 ? " for right argument": " for left argument",
|
|
flags & AMGf_unary? " for argument" : "",
|
|
HvNAME(stash),
|
|
fl? ",\n\tassignment variant used": "") );
|
|
}
|
|
/* Since we use shallow copy during assignment, we need
|
|
* to dublicate the contents, probably calling user-supplied
|
|
* version of copy operator
|
|
*/
|
|
/* We need to copy in following cases:
|
|
* a) Assignment form was called.
|
|
* assignshift==1, assign==T, method + 1 == off
|
|
* b) Increment or decrement, called directly.
|
|
* assignshift==0, assign==0, method + 0 == off
|
|
* c) Increment or decrement, translated to assignment add/subtr.
|
|
* assignshift==0, assign==T,
|
|
* force_cpy == T
|
|
* d) Increment or decrement, translated to nomethod.
|
|
* assignshift==0, assign==0,
|
|
* force_cpy == T
|
|
* e) Assignment form translated to nomethod.
|
|
* assignshift==1, assign==T, method + 1 != off
|
|
* force_cpy == T
|
|
*/
|
|
/* off is method, method+assignshift, or a result of opcode substitution.
|
|
* In the latter case assignshift==0, so only notfound case is important.
|
|
*/
|
|
if (( (method + assignshift == off)
|
|
&& (assign || (method == inc_amg) || (method == dec_amg)))
|
|
|| force_cpy)
|
|
RvDEEPCP(left);
|
|
{
|
|
dSP;
|
|
BINOP myop;
|
|
SV* res;
|
|
bool oldcatch = CATCH_GET;
|
|
|
|
CATCH_SET(TRUE);
|
|
Zero(&myop, 1, BINOP);
|
|
myop.op_last = (OP *) &myop;
|
|
myop.op_next = Nullop;
|
|
myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED;
|
|
|
|
PUSHSTACKi(PERLSI_OVERLOAD);
|
|
ENTER;
|
|
SAVEOP();
|
|
PL_op = (OP *) &myop;
|
|
if (PERLDB_SUB && PL_curstash != PL_debstash)
|
|
PL_op->op_private |= OPpENTERSUB_DB;
|
|
PUTBACK;
|
|
pp_pushmark(ARGS);
|
|
|
|
EXTEND(SP, notfound + 5);
|
|
PUSHs(lr>0? right: left);
|
|
PUSHs(lr>0? left: right);
|
|
PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no ));
|
|
if (notfound) {
|
|
PUSHs( sv_2mortal(newSVpv((char *)AMG_names[method + assignshift],0)) );
|
|
}
|
|
PUSHs((SV*)cv);
|
|
PUTBACK;
|
|
|
|
if (PL_op = pp_entersub(ARGS))
|
|
CALLRUNOPS();
|
|
LEAVE;
|
|
SPAGAIN;
|
|
|
|
res=POPs;
|
|
POPSTACK;
|
|
CATCH_SET(oldcatch);
|
|
|
|
if (postpr) {
|
|
int ans;
|
|
switch (method) {
|
|
case le_amg:
|
|
case sle_amg:
|
|
ans=SvIV(res)<=0; break;
|
|
case lt_amg:
|
|
case slt_amg:
|
|
ans=SvIV(res)<0; break;
|
|
case ge_amg:
|
|
case sge_amg:
|
|
ans=SvIV(res)>=0; break;
|
|
case gt_amg:
|
|
case sgt_amg:
|
|
ans=SvIV(res)>0; break;
|
|
case eq_amg:
|
|
case seq_amg:
|
|
ans=SvIV(res)==0; break;
|
|
case ne_amg:
|
|
case sne_amg:
|
|
ans=SvIV(res)!=0; break;
|
|
case inc_amg:
|
|
case dec_amg:
|
|
SvSetSV(left,res); return left;
|
|
case not_amg:
|
|
ans=!SvOK(res); break;
|
|
}
|
|
return boolSV(ans);
|
|
} else if (method==copy_amg) {
|
|
if (!SvROK(res)) {
|
|
croak("Copy method did not return a reference");
|
|
}
|
|
return SvREFCNT_inc(SvRV(res));
|
|
} else {
|
|
return res;
|
|
}
|
|
}
|
|
}
|
|
#endif /* OVERLOAD */
|
|
|