[10723] | 1 | /* gv.c |
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| 2 | * |
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[14544] | 3 | * Copyright (c) 1991-2000, Larry Wall |
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[10723] | 4 | * |
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| 5 | * You may distribute under the terms of either the GNU General Public |
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| 6 | * License or the Artistic License, as specified in the README file. |
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| 7 | * |
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| 8 | */ |
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| 9 | |
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| 10 | /* |
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| 11 | * 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure |
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| 12 | * of your inquisitiveness, I shall spend all the rest of my days answering |
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| 13 | * you. What more do you want to know?' |
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| 14 | * 'The names of all the stars, and of all living things, and the whole |
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| 15 | * history of Middle-earth and Over-heaven and of the Sundering Seas,' |
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| 16 | * laughed Pippin. |
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| 17 | */ |
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| 18 | |
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| 19 | #include "EXTERN.h" |
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[14544] | 20 | #define PERL_IN_GV_C |
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[10723] | 21 | #include "perl.h" |
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| 22 | |
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| 23 | GV * |
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[14544] | 24 | Perl_gv_AVadd(pTHX_ register GV *gv) |
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[10723] | 25 | { |
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| 26 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
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[14544] | 27 | Perl_croak(aTHX_ "Bad symbol for array"); |
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[10723] | 28 | if (!GvAV(gv)) |
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| 29 | GvAV(gv) = newAV(); |
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| 30 | return gv; |
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| 31 | } |
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| 32 | |
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| 33 | GV * |
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[14544] | 34 | Perl_gv_HVadd(pTHX_ register GV *gv) |
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[10723] | 35 | { |
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| 36 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
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[14544] | 37 | Perl_croak(aTHX_ "Bad symbol for hash"); |
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[10723] | 38 | if (!GvHV(gv)) |
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| 39 | GvHV(gv) = newHV(); |
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| 40 | return gv; |
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| 41 | } |
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| 42 | |
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| 43 | GV * |
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[14544] | 44 | Perl_gv_IOadd(pTHX_ register GV *gv) |
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[10723] | 45 | { |
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| 46 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
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[14544] | 47 | Perl_croak(aTHX_ "Bad symbol for filehandle"); |
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[10723] | 48 | if (!GvIOp(gv)) |
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| 49 | GvIOp(gv) = newIO(); |
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| 50 | return gv; |
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| 51 | } |
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| 52 | |
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| 53 | GV * |
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[14544] | 54 | Perl_gv_fetchfile(pTHX_ const char *name) |
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[10723] | 55 | { |
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[14544] | 56 | dTHR; |
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[10723] | 57 | char smallbuf[256]; |
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| 58 | char *tmpbuf; |
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| 59 | STRLEN tmplen; |
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| 60 | GV *gv; |
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| 61 | |
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[14544] | 62 | if (!PL_defstash) |
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| 63 | return Nullgv; |
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| 64 | |
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[10723] | 65 | tmplen = strlen(name) + 2; |
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| 66 | if (tmplen < sizeof smallbuf) |
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| 67 | tmpbuf = smallbuf; |
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| 68 | else |
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| 69 | New(603, tmpbuf, tmplen + 1, char); |
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| 70 | tmpbuf[0] = '_'; |
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| 71 | tmpbuf[1] = '<'; |
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| 72 | strcpy(tmpbuf + 2, name); |
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[14544] | 73 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
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| 74 | if (!isGV(gv)) { |
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| 75 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
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| 76 | sv_setpv(GvSV(gv), name); |
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| 77 | if (PERLDB_LINE) |
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| 78 | hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L'); |
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| 79 | } |
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[10723] | 80 | if (tmpbuf != smallbuf) |
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| 81 | Safefree(tmpbuf); |
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| 82 | return gv; |
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| 83 | } |
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| 84 | |
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| 85 | void |
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[14544] | 86 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
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[10723] | 87 | { |
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[14544] | 88 | dTHR; |
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[10723] | 89 | register GP *gp; |
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[14544] | 90 | bool doproto = SvTYPE(gv) > SVt_NULL; |
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| 91 | char *proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL; |
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[10723] | 92 | |
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| 93 | sv_upgrade((SV*)gv, SVt_PVGV); |
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[14544] | 94 | if (SvLEN(gv)) { |
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| 95 | if (proto) { |
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| 96 | SvPVX(gv) = NULL; |
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| 97 | SvLEN(gv) = 0; |
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| 98 | SvPOK_off(gv); |
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| 99 | } else |
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| 100 | Safefree(SvPVX(gv)); |
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| 101 | } |
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[10723] | 102 | Newz(602, gp, 1, GP); |
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| 103 | GvGP(gv) = gp_ref(gp); |
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| 104 | GvSV(gv) = NEWSV(72,0); |
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[14544] | 105 | GvLINE(gv) = CopLINE(PL_curcop); |
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| 106 | GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : ""; |
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| 107 | GvCVGEN(gv) = 0; |
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[10723] | 108 | GvEGV(gv) = gv; |
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| 109 | sv_magic((SV*)gv, (SV*)gv, '*', name, len); |
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[14544] | 110 | GvSTASH(gv) = (HV*)SvREFCNT_inc(stash); |
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[10723] | 111 | GvNAME(gv) = savepvn(name, len); |
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| 112 | GvNAMELEN(gv) = len; |
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[14544] | 113 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
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[10723] | 114 | GvMULTI_on(gv); |
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[14544] | 115 | if (doproto) { /* Replicate part of newSUB here. */ |
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| 116 | SvIOK_off(gv); |
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| 117 | ENTER; |
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| 118 | /* XXX unsafe for threads if eval_owner isn't held */ |
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| 119 | start_subparse(0,0); /* Create CV in compcv. */ |
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| 120 | GvCV(gv) = PL_compcv; |
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| 121 | LEAVE; |
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| 122 | |
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| 123 | PL_sub_generation++; |
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| 124 | CvGV(GvCV(gv)) = (GV*)SvREFCNT_inc(gv); |
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| 125 | CvFILE(GvCV(gv)) = CopFILE(PL_curcop); |
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| 126 | CvSTASH(GvCV(gv)) = PL_curstash; |
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| 127 | #ifdef USE_THREADS |
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| 128 | CvOWNER(GvCV(gv)) = 0; |
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| 129 | if (!CvMUTEXP(GvCV(gv))) { |
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| 130 | New(666, CvMUTEXP(GvCV(gv)), 1, perl_mutex); |
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| 131 | MUTEX_INIT(CvMUTEXP(GvCV(gv))); |
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| 132 | } |
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| 133 | #endif /* USE_THREADS */ |
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| 134 | if (proto) { |
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| 135 | sv_setpv((SV*)GvCV(gv), proto); |
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| 136 | Safefree(proto); |
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| 137 | } |
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| 138 | } |
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[10723] | 139 | } |
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| 140 | |
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[14544] | 141 | STATIC void |
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| 142 | S_gv_init_sv(pTHX_ GV *gv, I32 sv_type) |
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[10723] | 143 | { |
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| 144 | switch (sv_type) { |
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| 145 | case SVt_PVIO: |
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| 146 | (void)GvIOn(gv); |
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| 147 | break; |
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| 148 | case SVt_PVAV: |
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| 149 | (void)GvAVn(gv); |
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| 150 | break; |
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| 151 | case SVt_PVHV: |
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| 152 | (void)GvHVn(gv); |
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| 153 | break; |
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| 154 | } |
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| 155 | } |
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| 156 | |
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[14544] | 157 | /* |
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| 158 | =for apidoc gv_fetchmeth |
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| 159 | |
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| 160 | Returns the glob with the given C<name> and a defined subroutine or |
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| 161 | C<NULL>. The glob lives in the given C<stash>, or in the stashes |
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| 162 | accessible via @ISA and @UNIVERSAL. |
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| 163 | |
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| 164 | The argument C<level> should be either 0 or -1. If C<level==0>, as a |
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| 165 | side-effect creates a glob with the given C<name> in the given C<stash> |
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| 166 | which in the case of success contains an alias for the subroutine, and sets |
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| 167 | up caching info for this glob. Similarly for all the searched stashes. |
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| 168 | |
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| 169 | This function grants C<"SUPER"> token as a postfix of the stash name. The |
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| 170 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
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| 171 | visible to Perl code. So when calling C<call_sv>, you should not use |
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| 172 | the GV directly; instead, you should use the method's CV, which can be |
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| 173 | obtained from the GV with the C<GvCV> macro. |
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| 174 | |
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| 175 | =cut |
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| 176 | */ |
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| 177 | |
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[10723] | 178 | GV * |
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[14544] | 179 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
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[10723] | 180 | { |
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| 181 | AV* av; |
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| 182 | GV* topgv; |
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| 183 | GV* gv; |
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| 184 | GV** gvp; |
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| 185 | CV* cv; |
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| 186 | |
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| 187 | if (!stash) |
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| 188 | return 0; |
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| 189 | if ((level > 100) || (level < -100)) |
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[14544] | 190 | Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'", |
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| 191 | name, HvNAME(stash)); |
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[10723] | 192 | |
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[14544] | 193 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,HvNAME(stash)) ); |
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[10723] | 194 | |
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| 195 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
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| 196 | if (!gvp) |
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| 197 | topgv = Nullgv; |
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| 198 | else { |
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| 199 | topgv = *gvp; |
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| 200 | if (SvTYPE(topgv) != SVt_PVGV) |
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| 201 | gv_init(topgv, stash, name, len, TRUE); |
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[14544] | 202 | if ((cv = GvCV(topgv))) { |
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[10723] | 203 | /* If genuine method or valid cache entry, use it */ |
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[14544] | 204 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) |
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[10723] | 205 | return topgv; |
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| 206 | /* Stale cached entry: junk it */ |
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| 207 | SvREFCNT_dec(cv); |
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| 208 | GvCV(topgv) = cv = Nullcv; |
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| 209 | GvCVGEN(topgv) = 0; |
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| 210 | } |
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[14544] | 211 | else if (GvCVGEN(topgv) == PL_sub_generation) |
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| 212 | return 0; /* cache indicates sub doesn't exist */ |
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[10723] | 213 | } |
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| 214 | |
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| 215 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
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[14544] | 216 | av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav; |
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[10723] | 217 | |
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| 218 | /* create and re-create @.*::SUPER::ISA on demand */ |
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| 219 | if (!av || !SvMAGIC(av)) { |
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| 220 | char* packname = HvNAME(stash); |
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| 221 | STRLEN packlen = strlen(packname); |
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| 222 | |
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| 223 | if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) { |
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| 224 | HV* basestash; |
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| 225 | |
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| 226 | packlen -= 7; |
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| 227 | basestash = gv_stashpvn(packname, packlen, TRUE); |
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| 228 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); |
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[14544] | 229 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
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| 230 | dTHR; /* just for SvREFCNT_dec */ |
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[10723] | 231 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
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| 232 | if (!gvp || !(gv = *gvp)) |
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[14544] | 233 | Perl_croak(aTHX_ "Cannot create %s::ISA", HvNAME(stash)); |
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[10723] | 234 | if (SvTYPE(gv) != SVt_PVGV) |
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| 235 | gv_init(gv, stash, "ISA", 3, TRUE); |
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| 236 | SvREFCNT_dec(GvAV(gv)); |
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| 237 | GvAV(gv) = (AV*)SvREFCNT_inc(av); |
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| 238 | } |
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| 239 | } |
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| 240 | } |
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| 241 | |
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| 242 | if (av) { |
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| 243 | SV** svp = AvARRAY(av); |
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[14544] | 244 | /* NOTE: No support for tied ISA */ |
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| 245 | I32 items = AvFILLp(av) + 1; |
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[10723] | 246 | while (items--) { |
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| 247 | SV* sv = *svp++; |
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| 248 | HV* basestash = gv_stashsv(sv, FALSE); |
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| 249 | if (!basestash) { |
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[14544] | 250 | dTHR; /* just for ckWARN */ |
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| 251 | if (ckWARN(WARN_MISC)) |
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| 252 | Perl_warner(aTHX_ WARN_MISC, "Can't locate package %s for @%s::ISA", |
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[10723] | 253 | SvPVX(sv), HvNAME(stash)); |
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| 254 | continue; |
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| 255 | } |
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| 256 | gv = gv_fetchmeth(basestash, name, len, |
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| 257 | (level >= 0) ? level + 1 : level - 1); |
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| 258 | if (gv) |
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| 259 | goto gotcha; |
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| 260 | } |
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| 261 | } |
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| 262 | |
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| 263 | /* if at top level, try UNIVERSAL */ |
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| 264 | |
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| 265 | if (level == 0 || level == -1) { |
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| 266 | HV* lastchance; |
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| 267 | |
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[14544] | 268 | if ((lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE))) { |
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| 269 | if ((gv = gv_fetchmeth(lastchance, name, len, |
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| 270 | (level >= 0) ? level + 1 : level - 1))) |
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| 271 | { |
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[10723] | 272 | gotcha: |
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| 273 | /* |
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| 274 | * Cache method in topgv if: |
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| 275 | * 1. topgv has no synonyms (else inheritance crosses wires) |
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| 276 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
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| 277 | */ |
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| 278 | if (topgv && |
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| 279 | GvREFCNT(topgv) == 1 && |
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| 280 | (cv = GvCV(gv)) && |
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| 281 | (CvROOT(cv) || CvXSUB(cv))) |
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| 282 | { |
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[14544] | 283 | if ((cv = GvCV(topgv))) |
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[10723] | 284 | SvREFCNT_dec(cv); |
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| 285 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
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[14544] | 286 | GvCVGEN(topgv) = PL_sub_generation; |
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[10723] | 287 | } |
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| 288 | return gv; |
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| 289 | } |
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[14544] | 290 | else if (topgv && GvREFCNT(topgv) == 1) { |
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| 291 | /* cache the fact that the method is not defined */ |
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| 292 | GvCVGEN(topgv) = PL_sub_generation; |
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| 293 | } |
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[10723] | 294 | } |
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| 295 | } |
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| 296 | |
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| 297 | return 0; |
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| 298 | } |
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| 299 | |
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[14544] | 300 | /* |
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| 301 | =for apidoc gv_fetchmethod |
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| 302 | |
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| 303 | See L<gv_fetchmethod_autoload>. |
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| 304 | |
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| 305 | =cut |
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| 306 | */ |
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| 307 | |
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[10723] | 308 | GV * |
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[14544] | 309 | Perl_gv_fetchmethod(pTHX_ HV *stash, const char *name) |
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[10723] | 310 | { |
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| 311 | return gv_fetchmethod_autoload(stash, name, TRUE); |
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| 312 | } |
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| 313 | |
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[14544] | 314 | /* |
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| 315 | =for apidoc gv_fetchmethod_autoload |
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| 316 | |
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| 317 | Returns the glob which contains the subroutine to call to invoke the method |
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| 318 | on the C<stash>. In fact in the presence of autoloading this may be the |
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| 319 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is |
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| 320 | already setup. |
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| 321 | |
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| 322 | The third parameter of C<gv_fetchmethod_autoload> determines whether |
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| 323 | AUTOLOAD lookup is performed if the given method is not present: non-zero |
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| 324 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
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| 325 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
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| 326 | with a non-zero C<autoload> parameter. |
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| 327 | |
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| 328 | These functions grant C<"SUPER"> token as a prefix of the method name. Note |
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| 329 | that if you want to keep the returned glob for a long time, you need to |
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| 330 | check for it being "AUTOLOAD", since at the later time the call may load a |
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| 331 | different subroutine due to $AUTOLOAD changing its value. Use the glob |
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| 332 | created via a side effect to do this. |
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| 333 | |
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| 334 | These functions have the same side-effects and as C<gv_fetchmeth> with |
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| 335 | C<level==0>. C<name> should be writable if contains C<':'> or C<' |
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| 336 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to |
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| 337 | C<call_sv> apply equally to these functions. |
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| 338 | |
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| 339 | =cut |
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| 340 | */ |
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| 341 | |
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[10723] | 342 | GV * |
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[14544] | 343 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
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[10723] | 344 | { |
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[14544] | 345 | dTHR; |
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| 346 | register const char *nend; |
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| 347 | const char *nsplit = 0; |
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[10723] | 348 | GV* gv; |
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| 349 | |
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| 350 | for (nend = name; *nend; nend++) { |
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| 351 | if (*nend == '\'') |
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| 352 | nsplit = nend; |
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| 353 | else if (*nend == ':' && *(nend + 1) == ':') |
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| 354 | nsplit = ++nend; |
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| 355 | } |
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| 356 | if (nsplit) { |
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[14544] | 357 | const char *origname = name; |
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[10723] | 358 | name = nsplit + 1; |
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| 359 | if (*nsplit == ':') |
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| 360 | --nsplit; |
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| 361 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
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| 362 | /* ->SUPER::method should really be looked up in original stash */ |
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[14544] | 363 | SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
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| 364 | CopSTASHPV(PL_curcop))); |
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[10723] | 365 | stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); |
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[14544] | 366 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
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[10723] | 367 | origname, HvNAME(stash), name) ); |
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| 368 | } |
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| 369 | else |
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| 370 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); |
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| 371 | } |
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| 372 | |
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| 373 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
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| 374 | if (!gv) { |
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| 375 | if (strEQ(name,"import")) |
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[14544] | 376 | gv = (GV*)&PL_sv_yes; |
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[10723] | 377 | else if (autoload) |
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| 378 | gv = gv_autoload4(stash, name, nend - name, TRUE); |
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| 379 | } |
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| 380 | else if (autoload) { |
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| 381 | CV* cv = GvCV(gv); |
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| 382 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
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| 383 | GV* stubgv; |
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| 384 | GV* autogv; |
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| 385 | |
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| 386 | if (CvANON(cv)) |
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| 387 | stubgv = gv; |
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| 388 | else { |
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| 389 | stubgv = CvGV(cv); |
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| 390 | if (GvCV(stubgv) != cv) /* orphaned import */ |
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| 391 | stubgv = gv; |
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| 392 | } |
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| 393 | autogv = gv_autoload4(GvSTASH(stubgv), |
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| 394 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
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| 395 | if (autogv) |
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| 396 | gv = autogv; |
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| 397 | } |
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| 398 | } |
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| 399 | |
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| 400 | return gv; |
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| 401 | } |
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| 402 | |
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| 403 | GV* |
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[14544] | 404 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
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[10723] | 405 | { |
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[14544] | 406 | dTHR; |
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[10723] | 407 | static char autoload[] = "AUTOLOAD"; |
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| 408 | static STRLEN autolen = 8; |
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| 409 | GV* gv; |
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| 410 | CV* cv; |
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| 411 | HV* varstash; |
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| 412 | GV* vargv; |
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| 413 | SV* varsv; |
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| 414 | |
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| 415 | if (len == autolen && strnEQ(name, autoload, autolen)) |
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| 416 | return Nullgv; |
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| 417 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
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| 418 | return Nullgv; |
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| 419 | cv = GvCV(gv); |
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| 420 | |
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| 421 | /* |
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| 422 | * Inheriting AUTOLOAD for non-methods works ... for now. |
---|
| 423 | */ |
---|
[14544] | 424 | if (ckWARN(WARN_DEPRECATED) && !method && |
---|
| 425 | (GvCVGEN(gv) || GvSTASH(gv) != stash)) |
---|
| 426 | Perl_warner(aTHX_ WARN_DEPRECATED, |
---|
[10723] | 427 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
---|
| 428 | HvNAME(stash), (int)len, name); |
---|
| 429 | |
---|
| 430 | /* |
---|
| 431 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
---|
| 432 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
---|
| 433 | * use that, but for lack of anything better we will use the sub's |
---|
| 434 | * original package to look up $AUTOLOAD. |
---|
| 435 | */ |
---|
| 436 | varstash = GvSTASH(CvGV(cv)); |
---|
| 437 | vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); |
---|
| 438 | if (!isGV(vargv)) |
---|
| 439 | gv_init(vargv, varstash, autoload, autolen, FALSE); |
---|
| 440 | varsv = GvSV(vargv); |
---|
| 441 | sv_setpv(varsv, HvNAME(stash)); |
---|
| 442 | sv_catpvn(varsv, "::", 2); |
---|
| 443 | sv_catpvn(varsv, name, len); |
---|
| 444 | SvTAINTED_off(varsv); |
---|
| 445 | return gv; |
---|
| 446 | } |
---|
| 447 | |
---|
[14544] | 448 | /* |
---|
| 449 | =for apidoc gv_stashpv |
---|
| 450 | |
---|
| 451 | Returns a pointer to the stash for a specified package. C<name> should |
---|
| 452 | be a valid UTF-8 string. If C<create> is set then the package will be |
---|
| 453 | created if it does not already exist. If C<create> is not set and the |
---|
| 454 | package does not exist then NULL is returned. |
---|
| 455 | |
---|
| 456 | =cut |
---|
| 457 | */ |
---|
| 458 | |
---|
[10723] | 459 | HV* |
---|
[14544] | 460 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
---|
[10723] | 461 | { |
---|
| 462 | return gv_stashpvn(name, strlen(name), create); |
---|
| 463 | } |
---|
| 464 | |
---|
| 465 | HV* |
---|
[14544] | 466 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create) |
---|
[10723] | 467 | { |
---|
| 468 | char smallbuf[256]; |
---|
| 469 | char *tmpbuf; |
---|
| 470 | HV *stash; |
---|
| 471 | GV *tmpgv; |
---|
| 472 | |
---|
| 473 | if (namelen + 3 < sizeof smallbuf) |
---|
| 474 | tmpbuf = smallbuf; |
---|
| 475 | else |
---|
| 476 | New(606, tmpbuf, namelen + 3, char); |
---|
| 477 | Copy(name,tmpbuf,namelen,char); |
---|
| 478 | tmpbuf[namelen++] = ':'; |
---|
| 479 | tmpbuf[namelen++] = ':'; |
---|
| 480 | tmpbuf[namelen] = '\0'; |
---|
| 481 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
---|
| 482 | if (tmpbuf != smallbuf) |
---|
| 483 | Safefree(tmpbuf); |
---|
| 484 | if (!tmpgv) |
---|
| 485 | return 0; |
---|
| 486 | if (!GvHV(tmpgv)) |
---|
| 487 | GvHV(tmpgv) = newHV(); |
---|
| 488 | stash = GvHV(tmpgv); |
---|
| 489 | if (!HvNAME(stash)) |
---|
| 490 | HvNAME(stash) = savepv(name); |
---|
| 491 | return stash; |
---|
| 492 | } |
---|
| 493 | |
---|
[14544] | 494 | /* |
---|
| 495 | =for apidoc gv_stashsv |
---|
| 496 | |
---|
| 497 | Returns a pointer to the stash for a specified package, which must be a |
---|
| 498 | valid UTF-8 string. See C<gv_stashpv>. |
---|
| 499 | |
---|
| 500 | =cut |
---|
| 501 | */ |
---|
| 502 | |
---|
[10723] | 503 | HV* |
---|
[14544] | 504 | Perl_gv_stashsv(pTHX_ SV *sv, I32 create) |
---|
[10723] | 505 | { |
---|
| 506 | register char *ptr; |
---|
| 507 | STRLEN len; |
---|
| 508 | ptr = SvPV(sv,len); |
---|
| 509 | return gv_stashpvn(ptr, len, create); |
---|
| 510 | } |
---|
| 511 | |
---|
| 512 | |
---|
| 513 | GV * |
---|
[14544] | 514 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) |
---|
[10723] | 515 | { |
---|
[14544] | 516 | dTHR; |
---|
| 517 | register const char *name = nambeg; |
---|
[10723] | 518 | register GV *gv = 0; |
---|
| 519 | GV**gvp; |
---|
| 520 | I32 len; |
---|
[14544] | 521 | register const char *namend; |
---|
[10723] | 522 | HV *stash = 0; |
---|
| 523 | U32 add_gvflags = 0; |
---|
| 524 | |
---|
| 525 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
---|
| 526 | name++; |
---|
| 527 | |
---|
| 528 | for (namend = name; *namend; namend++) { |
---|
[14544] | 529 | if ((*namend == ':' && namend[1] == ':') |
---|
| 530 | || (*namend == '\'' && namend[1])) |
---|
[10723] | 531 | { |
---|
| 532 | if (!stash) |
---|
[14544] | 533 | stash = PL_defstash; |
---|
[10723] | 534 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
---|
| 535 | return Nullgv; |
---|
| 536 | |
---|
| 537 | len = namend - name; |
---|
| 538 | if (len > 0) { |
---|
[14544] | 539 | char smallbuf[256]; |
---|
| 540 | char *tmpbuf; |
---|
| 541 | |
---|
| 542 | if (len + 3 < sizeof smallbuf) |
---|
| 543 | tmpbuf = smallbuf; |
---|
| 544 | else |
---|
| 545 | New(601, tmpbuf, len+3, char); |
---|
[10723] | 546 | Copy(name, tmpbuf, len, char); |
---|
| 547 | tmpbuf[len++] = ':'; |
---|
| 548 | tmpbuf[len++] = ':'; |
---|
| 549 | tmpbuf[len] = '\0'; |
---|
| 550 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
---|
[14544] | 551 | gv = gvp ? *gvp : Nullgv; |
---|
| 552 | if (gv && gv != (GV*)&PL_sv_undef) { |
---|
| 553 | if (SvTYPE(gv) != SVt_PVGV) |
---|
| 554 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
---|
| 555 | else |
---|
| 556 | GvMULTI_on(gv); |
---|
| 557 | } |
---|
| 558 | if (tmpbuf != smallbuf) |
---|
| 559 | Safefree(tmpbuf); |
---|
| 560 | if (!gv || gv == (GV*)&PL_sv_undef) |
---|
[10723] | 561 | return Nullgv; |
---|
| 562 | |
---|
| 563 | if (!(stash = GvHV(gv))) |
---|
| 564 | stash = GvHV(gv) = newHV(); |
---|
| 565 | |
---|
| 566 | if (!HvNAME(stash)) |
---|
| 567 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
---|
| 568 | } |
---|
| 569 | |
---|
| 570 | if (*namend == ':') |
---|
| 571 | namend++; |
---|
| 572 | namend++; |
---|
| 573 | name = namend; |
---|
| 574 | if (!*name) |
---|
[14544] | 575 | return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE); |
---|
[10723] | 576 | } |
---|
| 577 | } |
---|
| 578 | len = namend - name; |
---|
| 579 | if (!len) |
---|
| 580 | len = 1; |
---|
| 581 | |
---|
| 582 | /* No stash in name, so see how we can default */ |
---|
| 583 | |
---|
| 584 | if (!stash) { |
---|
[14544] | 585 | if (isIDFIRST_lazy(name)) { |
---|
[10723] | 586 | bool global = FALSE; |
---|
| 587 | |
---|
| 588 | if (isUPPER(*name)) { |
---|
[14544] | 589 | if (*name == 'S' && ( |
---|
| 590 | strEQ(name, "SIG") || |
---|
| 591 | strEQ(name, "STDIN") || |
---|
| 592 | strEQ(name, "STDOUT") || |
---|
| 593 | strEQ(name, "STDERR"))) |
---|
| 594 | global = TRUE; |
---|
| 595 | else if (*name == 'I' && strEQ(name, "INC")) |
---|
| 596 | global = TRUE; |
---|
| 597 | else if (*name == 'E' && strEQ(name, "ENV")) |
---|
| 598 | global = TRUE; |
---|
[10723] | 599 | else if (*name == 'A' && ( |
---|
| 600 | strEQ(name, "ARGV") || |
---|
[14544] | 601 | strEQ(name, "ARGVOUT"))) |
---|
[10723] | 602 | global = TRUE; |
---|
| 603 | } |
---|
| 604 | else if (*name == '_' && !name[1]) |
---|
| 605 | global = TRUE; |
---|
| 606 | |
---|
| 607 | if (global) |
---|
[14544] | 608 | stash = PL_defstash; |
---|
| 609 | else if ((COP*)PL_curcop == &PL_compiling) { |
---|
| 610 | stash = PL_curstash; |
---|
| 611 | if (add && (PL_hints & HINT_STRICT_VARS) && |
---|
[10723] | 612 | sv_type != SVt_PVCV && |
---|
| 613 | sv_type != SVt_PVGV && |
---|
| 614 | sv_type != SVt_PVFM && |
---|
| 615 | sv_type != SVt_PVIO && |
---|
| 616 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
---|
| 617 | { |
---|
| 618 | gvp = (GV**)hv_fetch(stash,name,len,0); |
---|
| 619 | if (!gvp || |
---|
[14544] | 620 | *gvp == (GV*)&PL_sv_undef || |
---|
[10723] | 621 | SvTYPE(*gvp) != SVt_PVGV) |
---|
| 622 | { |
---|
| 623 | stash = 0; |
---|
| 624 | } |
---|
[14544] | 625 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
---|
| 626 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || |
---|
| 627 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) |
---|
[10723] | 628 | { |
---|
[14544] | 629 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
---|
[10723] | 630 | sv_type == SVt_PVAV ? '@' : |
---|
| 631 | sv_type == SVt_PVHV ? '%' : '$', |
---|
| 632 | name); |
---|
| 633 | if (GvCVu(*gvp)) |
---|
[14544] | 634 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
---|
[10723] | 635 | stash = 0; |
---|
| 636 | } |
---|
| 637 | } |
---|
| 638 | } |
---|
| 639 | else |
---|
[14544] | 640 | stash = CopSTASH(PL_curcop); |
---|
[10723] | 641 | } |
---|
| 642 | else |
---|
[14544] | 643 | stash = PL_defstash; |
---|
[10723] | 644 | } |
---|
| 645 | |
---|
| 646 | /* By this point we should have a stash and a name */ |
---|
| 647 | |
---|
| 648 | if (!stash) { |
---|
| 649 | if (add) { |
---|
[14544] | 650 | qerror(Perl_mess(aTHX_ |
---|
| 651 | "Global symbol \"%s%s\" requires explicit package name", |
---|
| 652 | (sv_type == SVt_PV ? "$" |
---|
| 653 | : sv_type == SVt_PVAV ? "@" |
---|
| 654 | : sv_type == SVt_PVHV ? "%" |
---|
| 655 | : ""), name)); |
---|
[10723] | 656 | } |
---|
[14544] | 657 | return Nullgv; |
---|
[10723] | 658 | } |
---|
| 659 | |
---|
| 660 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
---|
| 661 | return Nullgv; |
---|
| 662 | |
---|
| 663 | gvp = (GV**)hv_fetch(stash,name,len,add); |
---|
[14544] | 664 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
---|
[10723] | 665 | return Nullgv; |
---|
| 666 | gv = *gvp; |
---|
| 667 | if (SvTYPE(gv) == SVt_PVGV) { |
---|
| 668 | if (add) { |
---|
| 669 | GvMULTI_on(gv); |
---|
| 670 | gv_init_sv(gv, sv_type); |
---|
| 671 | } |
---|
| 672 | return gv; |
---|
[14544] | 673 | } else if (add & GV_NOINIT) { |
---|
| 674 | return gv; |
---|
[10723] | 675 | } |
---|
| 676 | |
---|
| 677 | /* Adding a new symbol */ |
---|
| 678 | |
---|
[14544] | 679 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
---|
| 680 | Perl_warner(aTHX_ WARN_INTERNAL, "Had to create %s unexpectedly", nambeg); |
---|
| 681 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
---|
[10723] | 682 | gv_init_sv(gv, sv_type); |
---|
| 683 | GvFLAGS(gv) |= add_gvflags; |
---|
| 684 | |
---|
[14544] | 685 | if (isLEXWARN_on && isALPHA(name[0]) && ! ckWARN(WARN_ONCE)) |
---|
| 686 | GvMULTI_on(gv) ; |
---|
| 687 | |
---|
[10723] | 688 | /* set up magic where warranted */ |
---|
| 689 | switch (*name) { |
---|
| 690 | case 'A': |
---|
| 691 | if (strEQ(name, "ARGV")) { |
---|
| 692 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
---|
| 693 | } |
---|
| 694 | break; |
---|
| 695 | case 'E': |
---|
| 696 | if (strnEQ(name, "EXPORT", 6)) |
---|
| 697 | GvMULTI_on(gv); |
---|
| 698 | break; |
---|
| 699 | case 'I': |
---|
| 700 | if (strEQ(name, "ISA")) { |
---|
| 701 | AV* av = GvAVn(gv); |
---|
| 702 | GvMULTI_on(gv); |
---|
| 703 | sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0); |
---|
[14544] | 704 | /* NOTE: No support for tied ISA */ |
---|
| 705 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
---|
| 706 | && AvFILLp(av) == -1) |
---|
[10723] | 707 | { |
---|
| 708 | char *pname; |
---|
[14544] | 709 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
---|
[10723] | 710 | gv_stashpvn(pname, 9, TRUE); |
---|
[14544] | 711 | av_push(av, newSVpvn(pname = "DB_File",7)); |
---|
[10723] | 712 | gv_stashpvn(pname, 7, TRUE); |
---|
[14544] | 713 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
---|
[10723] | 714 | gv_stashpvn(pname, 9, TRUE); |
---|
[14544] | 715 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
---|
[10723] | 716 | gv_stashpvn(pname, 9, TRUE); |
---|
[14544] | 717 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
---|
[10723] | 718 | gv_stashpvn(pname, 9, TRUE); |
---|
| 719 | } |
---|
| 720 | } |
---|
| 721 | break; |
---|
| 722 | case 'O': |
---|
| 723 | if (strEQ(name, "OVERLOAD")) { |
---|
| 724 | HV* hv = GvHVn(gv); |
---|
| 725 | GvMULTI_on(gv); |
---|
[14544] | 726 | hv_magic(hv, gv, 'A'); |
---|
[10723] | 727 | } |
---|
| 728 | break; |
---|
| 729 | case 'S': |
---|
| 730 | if (strEQ(name, "SIG")) { |
---|
| 731 | HV *hv; |
---|
| 732 | I32 i; |
---|
[14544] | 733 | if (!PL_psig_ptr) { |
---|
| 734 | int sig_num[] = { SIG_NUM }; |
---|
| 735 | New(73, PL_psig_ptr, sizeof(sig_num)/sizeof(*sig_num), SV*); |
---|
| 736 | New(73, PL_psig_name, sizeof(sig_num)/sizeof(*sig_num), SV*); |
---|
| 737 | } |
---|
| 738 | GvMULTI_on(gv); |
---|
| 739 | hv = GvHVn(gv); |
---|
| 740 | hv_magic(hv, gv, 'S'); |
---|
| 741 | for (i = 1; PL_sig_name[i]; i++) { |
---|
[10723] | 742 | SV ** init; |
---|
[14544] | 743 | init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
---|
| 744 | if (init) |
---|
| 745 | sv_setsv(*init, &PL_sv_undef); |
---|
| 746 | PL_psig_ptr[i] = 0; |
---|
| 747 | PL_psig_name[i] = 0; |
---|
[10723] | 748 | } |
---|
| 749 | } |
---|
| 750 | break; |
---|
[14544] | 751 | case 'V': |
---|
| 752 | if (strEQ(name, "VERSION")) |
---|
| 753 | GvMULTI_on(gv); |
---|
| 754 | break; |
---|
[10723] | 755 | |
---|
| 756 | case '&': |
---|
| 757 | if (len > 1) |
---|
| 758 | break; |
---|
[14544] | 759 | PL_sawampersand = TRUE; |
---|
[10723] | 760 | goto ro_magicalize; |
---|
| 761 | |
---|
| 762 | case '`': |
---|
| 763 | if (len > 1) |
---|
| 764 | break; |
---|
[14544] | 765 | PL_sawampersand = TRUE; |
---|
[10723] | 766 | goto ro_magicalize; |
---|
| 767 | |
---|
| 768 | case '\'': |
---|
| 769 | if (len > 1) |
---|
| 770 | break; |
---|
[14544] | 771 | PL_sawampersand = TRUE; |
---|
[10723] | 772 | goto ro_magicalize; |
---|
| 773 | |
---|
| 774 | case ':': |
---|
| 775 | if (len > 1) |
---|
| 776 | break; |
---|
[14544] | 777 | sv_setpv(GvSV(gv),PL_chopset); |
---|
[10723] | 778 | goto magicalize; |
---|
| 779 | |
---|
| 780 | case '?': |
---|
| 781 | if (len > 1) |
---|
| 782 | break; |
---|
| 783 | #ifdef COMPLEX_STATUS |
---|
[14544] | 784 | (void)SvUPGRADE(GvSV(gv), SVt_PVLV); |
---|
[10723] | 785 | #endif |
---|
| 786 | goto magicalize; |
---|
| 787 | |
---|
[14544] | 788 | case '!': |
---|
| 789 | if (len > 1) |
---|
| 790 | break; |
---|
| 791 | if (sv_type > SVt_PV && PL_curcop != &PL_compiling) { |
---|
| 792 | HV* stash = gv_stashpvn("Errno",5,FALSE); |
---|
| 793 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { |
---|
| 794 | dSP; |
---|
| 795 | PUTBACK; |
---|
| 796 | require_pv("Errno.pm"); |
---|
| 797 | SPAGAIN; |
---|
| 798 | stash = gv_stashpvn("Errno",5,FALSE); |
---|
| 799 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) |
---|
| 800 | Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available"); |
---|
| 801 | } |
---|
| 802 | } |
---|
| 803 | goto magicalize; |
---|
| 804 | case '-': |
---|
| 805 | if (len > 1) |
---|
| 806 | break; |
---|
| 807 | else { |
---|
| 808 | AV* av = GvAVn(gv); |
---|
| 809 | sv_magic((SV*)av, Nullsv, 'D', Nullch, 0); |
---|
| 810 | } |
---|
| 811 | goto magicalize; |
---|
[10723] | 812 | case '#': |
---|
| 813 | case '*': |
---|
[14544] | 814 | if (ckWARN(WARN_DEPRECATED) && len == 1 && sv_type == SVt_PV) |
---|
| 815 | Perl_warner(aTHX_ WARN_DEPRECATED, "Use of $%s is deprecated", name); |
---|
[10723] | 816 | /* FALL THROUGH */ |
---|
| 817 | case '[': |
---|
| 818 | case '^': |
---|
| 819 | case '~': |
---|
| 820 | case '=': |
---|
| 821 | case '%': |
---|
| 822 | case '.': |
---|
| 823 | case '(': |
---|
| 824 | case ')': |
---|
| 825 | case '<': |
---|
| 826 | case '>': |
---|
| 827 | case ',': |
---|
| 828 | case '\\': |
---|
| 829 | case '/': |
---|
| 830 | case '|': |
---|
[14544] | 831 | case '\001': /* $^A */ |
---|
| 832 | case '\003': /* $^C */ |
---|
| 833 | case '\004': /* $^D */ |
---|
| 834 | case '\005': /* $^E */ |
---|
| 835 | case '\006': /* $^F */ |
---|
| 836 | case '\010': /* $^H */ |
---|
| 837 | case '\011': /* $^I, NOT \t in EBCDIC */ |
---|
| 838 | case '\017': /* $^O */ |
---|
| 839 | case '\020': /* $^P */ |
---|
| 840 | case '\024': /* $^T */ |
---|
[10723] | 841 | if (len > 1) |
---|
| 842 | break; |
---|
| 843 | goto magicalize; |
---|
[14544] | 844 | case '\023': /* $^S */ |
---|
| 845 | if (len > 1) |
---|
| 846 | break; |
---|
| 847 | goto ro_magicalize; |
---|
| 848 | case '\027': /* $^W & $^WARNING_BITS */ |
---|
| 849 | if (len > 1 && strNE(name, "\027ARNING_BITS") |
---|
| 850 | && strNE(name, "\027IDE_SYSTEM_CALLS")) |
---|
| 851 | break; |
---|
| 852 | goto magicalize; |
---|
[10723] | 853 | |
---|
| 854 | case '+': |
---|
[14544] | 855 | if (len > 1) |
---|
| 856 | break; |
---|
| 857 | else { |
---|
| 858 | AV* av = GvAVn(gv); |
---|
| 859 | sv_magic((SV*)av, (SV*)av, 'D', Nullch, 0); |
---|
| 860 | } |
---|
| 861 | /* FALL THROUGH */ |
---|
[10723] | 862 | case '1': |
---|
| 863 | case '2': |
---|
| 864 | case '3': |
---|
| 865 | case '4': |
---|
| 866 | case '5': |
---|
| 867 | case '6': |
---|
| 868 | case '7': |
---|
| 869 | case '8': |
---|
| 870 | case '9': |
---|
| 871 | ro_magicalize: |
---|
| 872 | SvREADONLY_on(GvSV(gv)); |
---|
| 873 | magicalize: |
---|
| 874 | sv_magic(GvSV(gv), (SV*)gv, 0, name, len); |
---|
| 875 | break; |
---|
| 876 | |
---|
[14544] | 877 | case '\014': /* $^L */ |
---|
[10723] | 878 | if (len > 1) |
---|
| 879 | break; |
---|
| 880 | sv_setpv(GvSV(gv),"\f"); |
---|
[14544] | 881 | PL_formfeed = GvSV(gv); |
---|
[10723] | 882 | break; |
---|
| 883 | case ';': |
---|
| 884 | if (len > 1) |
---|
| 885 | break; |
---|
| 886 | sv_setpv(GvSV(gv),"\034"); |
---|
| 887 | break; |
---|
| 888 | case ']': |
---|
| 889 | if (len == 1) { |
---|
| 890 | SV *sv = GvSV(gv); |
---|
[14544] | 891 | (void)SvUPGRADE(sv, SVt_PVNV); |
---|
| 892 | SvNVX(sv) = SvNVX(PL_patchlevel); |
---|
| 893 | SvNOK_on(sv); |
---|
| 894 | (void)SvPV_nolen(sv); |
---|
[10723] | 895 | SvREADONLY_on(sv); |
---|
| 896 | } |
---|
| 897 | break; |
---|
[14544] | 898 | case '\026': /* $^V */ |
---|
| 899 | if (len == 1) { |
---|
| 900 | SV *sv = GvSV(gv); |
---|
| 901 | GvSV(gv) = SvREFCNT_inc(PL_patchlevel); |
---|
| 902 | SvREFCNT_dec(sv); |
---|
| 903 | } |
---|
| 904 | break; |
---|
[10723] | 905 | } |
---|
| 906 | return gv; |
---|
| 907 | } |
---|
| 908 | |
---|
| 909 | void |
---|
[14544] | 910 | Perl_gv_fullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
---|
[10723] | 911 | { |
---|
| 912 | HV *hv = GvSTASH(gv); |
---|
| 913 | if (!hv) { |
---|
[14544] | 914 | (void)SvOK_off(sv); |
---|
[10723] | 915 | return; |
---|
| 916 | } |
---|
| 917 | sv_setpv(sv, prefix ? prefix : ""); |
---|
| 918 | sv_catpv(sv,HvNAME(hv)); |
---|
| 919 | sv_catpvn(sv,"::", 2); |
---|
| 920 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
---|
| 921 | } |
---|
| 922 | |
---|
| 923 | void |
---|
[14544] | 924 | Perl_gv_efullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
---|
[10723] | 925 | { |
---|
| 926 | GV *egv = GvEGV(gv); |
---|
| 927 | if (!egv) |
---|
| 928 | egv = gv; |
---|
| 929 | gv_fullname3(sv, egv, prefix); |
---|
| 930 | } |
---|
| 931 | |
---|
| 932 | /* XXX compatibility with versions <= 5.003. */ |
---|
| 933 | void |
---|
[14544] | 934 | Perl_gv_fullname(pTHX_ SV *sv, GV *gv) |
---|
[10723] | 935 | { |
---|
| 936 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
---|
| 937 | } |
---|
| 938 | |
---|
| 939 | /* XXX compatibility with versions <= 5.003. */ |
---|
| 940 | void |
---|
[14544] | 941 | Perl_gv_efullname(pTHX_ SV *sv, GV *gv) |
---|
[10723] | 942 | { |
---|
| 943 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
---|
| 944 | } |
---|
| 945 | |
---|
| 946 | IO * |
---|
[14544] | 947 | Perl_newIO(pTHX) |
---|
[10723] | 948 | { |
---|
[14544] | 949 | dTHR; |
---|
[10723] | 950 | IO *io; |
---|
| 951 | GV *iogv; |
---|
| 952 | |
---|
| 953 | io = (IO*)NEWSV(0,0); |
---|
| 954 | sv_upgrade((SV *)io,SVt_PVIO); |
---|
| 955 | SvREFCNT(io) = 1; |
---|
| 956 | SvOBJECT_on(io); |
---|
| 957 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
---|
[14544] | 958 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
---|
| 959 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) |
---|
[10723] | 960 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
---|
| 961 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
---|
| 962 | return io; |
---|
| 963 | } |
---|
| 964 | |
---|
| 965 | void |
---|
[14544] | 966 | Perl_gv_check(pTHX_ HV *stash) |
---|
[10723] | 967 | { |
---|
[14544] | 968 | dTHR; |
---|
[10723] | 969 | register HE *entry; |
---|
| 970 | register I32 i; |
---|
| 971 | register GV *gv; |
---|
| 972 | HV *hv; |
---|
| 973 | |
---|
| 974 | if (!HvARRAY(stash)) |
---|
| 975 | return; |
---|
| 976 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
---|
| 977 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
---|
| 978 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
---|
| 979 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv)) |
---|
| 980 | { |
---|
[14544] | 981 | if (hv != PL_defstash && hv != stash) |
---|
[10723] | 982 | gv_check(hv); /* nested package */ |
---|
| 983 | } |
---|
| 984 | else if (isALPHA(*HeKEY(entry))) { |
---|
[14544] | 985 | char *file; |
---|
[10723] | 986 | gv = (GV*)HeVAL(entry); |
---|
[14544] | 987 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
---|
[10723] | 988 | continue; |
---|
[14544] | 989 | file = GvFILE(gv); |
---|
| 990 | /* performance hack: if filename is absolute and it's a standard |
---|
| 991 | * module, don't bother warning */ |
---|
| 992 | if (file |
---|
| 993 | && PERL_FILE_IS_ABSOLUTE(file) |
---|
| 994 | && (instr(file, "/lib/") || instr(file, ".pm"))) |
---|
| 995 | { |
---|
[10723] | 996 | continue; |
---|
[14544] | 997 | } |
---|
| 998 | CopLINE_set(PL_curcop, GvLINE(gv)); |
---|
| 999 | #ifdef USE_ITHREADS |
---|
| 1000 | CopFILE(PL_curcop) = file; /* set for warning */ |
---|
| 1001 | #else |
---|
| 1002 | CopFILEGV(PL_curcop) = gv_fetchfile(file); |
---|
| 1003 | #endif |
---|
| 1004 | Perl_warner(aTHX_ WARN_ONCE, |
---|
| 1005 | "Name \"%s::%s\" used only once: possible typo", |
---|
[10723] | 1006 | HvNAME(stash), GvNAME(gv)); |
---|
| 1007 | } |
---|
| 1008 | } |
---|
| 1009 | } |
---|
| 1010 | } |
---|
| 1011 | |
---|
| 1012 | GV * |
---|
[14544] | 1013 | Perl_newGVgen(pTHX_ char *pack) |
---|
[10723] | 1014 | { |
---|
[14544] | 1015 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
---|
[10723] | 1016 | TRUE, SVt_PVGV); |
---|
| 1017 | } |
---|
| 1018 | |
---|
| 1019 | /* hopefully this is only called on local symbol table entries */ |
---|
| 1020 | |
---|
| 1021 | GP* |
---|
[14544] | 1022 | Perl_gp_ref(pTHX_ GP *gp) |
---|
[10723] | 1023 | { |
---|
[14544] | 1024 | if (!gp) |
---|
| 1025 | return (GP*)NULL; |
---|
[10723] | 1026 | gp->gp_refcnt++; |
---|
| 1027 | if (gp->gp_cv) { |
---|
| 1028 | if (gp->gp_cvgen) { |
---|
| 1029 | /* multi-named GPs cannot be used for method cache */ |
---|
| 1030 | SvREFCNT_dec(gp->gp_cv); |
---|
| 1031 | gp->gp_cv = Nullcv; |
---|
| 1032 | gp->gp_cvgen = 0; |
---|
| 1033 | } |
---|
| 1034 | else { |
---|
| 1035 | /* Adding a new name to a subroutine invalidates method cache */ |
---|
[14544] | 1036 | PL_sub_generation++; |
---|
[10723] | 1037 | } |
---|
| 1038 | } |
---|
| 1039 | return gp; |
---|
| 1040 | } |
---|
| 1041 | |
---|
| 1042 | void |
---|
[14544] | 1043 | Perl_gp_free(pTHX_ GV *gv) |
---|
[10723] | 1044 | { |
---|
[14544] | 1045 | dTHR; |
---|
[10723] | 1046 | GP* gp; |
---|
| 1047 | |
---|
| 1048 | if (!gv || !(gp = GvGP(gv))) |
---|
| 1049 | return; |
---|
| 1050 | if (gp->gp_refcnt == 0) { |
---|
[14544] | 1051 | if (ckWARN_d(WARN_INTERNAL)) |
---|
| 1052 | Perl_warner(aTHX_ WARN_INTERNAL, |
---|
| 1053 | "Attempt to free unreferenced glob pointers"); |
---|
[10723] | 1054 | return; |
---|
| 1055 | } |
---|
| 1056 | if (gp->gp_cv) { |
---|
| 1057 | /* Deleting the name of a subroutine invalidates method cache */ |
---|
[14544] | 1058 | PL_sub_generation++; |
---|
[10723] | 1059 | } |
---|
| 1060 | if (--gp->gp_refcnt > 0) { |
---|
| 1061 | if (gp->gp_egv == gv) |
---|
| 1062 | gp->gp_egv = 0; |
---|
| 1063 | return; |
---|
| 1064 | } |
---|
| 1065 | |
---|
| 1066 | SvREFCNT_dec(gp->gp_sv); |
---|
| 1067 | SvREFCNT_dec(gp->gp_av); |
---|
| 1068 | SvREFCNT_dec(gp->gp_hv); |
---|
| 1069 | SvREFCNT_dec(gp->gp_io); |
---|
| 1070 | SvREFCNT_dec(gp->gp_cv); |
---|
| 1071 | SvREFCNT_dec(gp->gp_form); |
---|
| 1072 | |
---|
| 1073 | Safefree(gp); |
---|
| 1074 | GvGP(gv) = 0; |
---|
| 1075 | } |
---|
| 1076 | |
---|
| 1077 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) |
---|
| 1078 | #define MICROPORT |
---|
| 1079 | #endif |
---|
| 1080 | |
---|
| 1081 | #ifdef MICROPORT /* Microport 2.4 hack */ |
---|
| 1082 | AV *GvAVn(gv) |
---|
| 1083 | register GV *gv; |
---|
| 1084 | { |
---|
| 1085 | if (GvGP(gv)->gp_av) |
---|
| 1086 | return GvGP(gv)->gp_av; |
---|
| 1087 | else |
---|
| 1088 | return GvGP(gv_AVadd(gv))->gp_av; |
---|
| 1089 | } |
---|
| 1090 | |
---|
| 1091 | HV *GvHVn(gv) |
---|
| 1092 | register GV *gv; |
---|
| 1093 | { |
---|
| 1094 | if (GvGP(gv)->gp_hv) |
---|
| 1095 | return GvGP(gv)->gp_hv; |
---|
| 1096 | else |
---|
| 1097 | return GvGP(gv_HVadd(gv))->gp_hv; |
---|
| 1098 | } |
---|
| 1099 | #endif /* Microport 2.4 hack */ |
---|
| 1100 | |
---|
| 1101 | /* Updates and caches the CV's */ |
---|
| 1102 | |
---|
| 1103 | bool |
---|
[14544] | 1104 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
---|
[10723] | 1105 | { |
---|
[14544] | 1106 | dTHR; |
---|
[10723] | 1107 | GV* gv; |
---|
| 1108 | CV* cv; |
---|
| 1109 | MAGIC* mg=mg_find((SV*)stash,'c'); |
---|
[14544] | 1110 | AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
---|
[10723] | 1111 | AMT amt; |
---|
[14544] | 1112 | STRLEN n_a; |
---|
| 1113 | #ifdef OVERLOAD_VIA_HASH |
---|
| 1114 | GV** gvp; |
---|
| 1115 | HV* hv; |
---|
| 1116 | #endif |
---|
[10723] | 1117 | |
---|
[14544] | 1118 | if (mg && amtp->was_ok_am == PL_amagic_generation |
---|
| 1119 | && amtp->was_ok_sub == PL_sub_generation) |
---|
[10723] | 1120 | return AMT_AMAGIC(amtp); |
---|
| 1121 | if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */ |
---|
| 1122 | int i; |
---|
| 1123 | for (i=1; i<NofAMmeth; i++) { |
---|
| 1124 | if (amtp->table[i]) { |
---|
| 1125 | SvREFCNT_dec(amtp->table[i]); |
---|
| 1126 | } |
---|
| 1127 | } |
---|
| 1128 | } |
---|
| 1129 | sv_unmagic((SV*)stash, 'c'); |
---|
| 1130 | |
---|
[14544] | 1131 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME(stash)) ); |
---|
[10723] | 1132 | |
---|
[14544] | 1133 | amt.was_ok_am = PL_amagic_generation; |
---|
| 1134 | amt.was_ok_sub = PL_sub_generation; |
---|
[10723] | 1135 | amt.fallback = AMGfallNO; |
---|
| 1136 | amt.flags = 0; |
---|
| 1137 | |
---|
| 1138 | #ifdef OVERLOAD_VIA_HASH |
---|
| 1139 | gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */ |
---|
[14544] | 1140 | if (gvp && ((gv = *gvp) != (GV*)&PL_sv_undef && (hv = GvHV(gv)))) { |
---|
[10723] | 1141 | int filled=0; |
---|
| 1142 | int i; |
---|
| 1143 | char *cp; |
---|
| 1144 | SV* sv; |
---|
| 1145 | SV** svp; |
---|
| 1146 | |
---|
[14544] | 1147 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
---|
[10723] | 1148 | |
---|
[14544] | 1149 | if (( cp = (char *)PL_AMG_names[0] ) && |
---|
[10723] | 1150 | (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) { |
---|
| 1151 | if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
---|
| 1152 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
---|
| 1153 | } |
---|
| 1154 | for (i = 1; i < NofAMmeth; i++) { |
---|
| 1155 | cv = 0; |
---|
[14544] | 1156 | cp = (char *)PL_AMG_names[i]; |
---|
[10723] | 1157 | |
---|
| 1158 | svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE); |
---|
[14544] | 1159 | if (svp && ((sv = *svp) != &PL_sv_undef)) { |
---|
[10723] | 1160 | switch (SvTYPE(sv)) { |
---|
| 1161 | default: |
---|
| 1162 | if (!SvROK(sv)) { |
---|
| 1163 | if (!SvOK(sv)) break; |
---|
[14544] | 1164 | gv = gv_fetchmethod(stash, SvPV(sv, n_a)); |
---|
[10723] | 1165 | if (gv) cv = GvCV(gv); |
---|
| 1166 | break; |
---|
| 1167 | } |
---|
| 1168 | cv = (CV*)SvRV(sv); |
---|
| 1169 | if (SvTYPE(cv) == SVt_PVCV) |
---|
| 1170 | break; |
---|
| 1171 | /* FALL THROUGH */ |
---|
| 1172 | case SVt_PVHV: |
---|
| 1173 | case SVt_PVAV: |
---|
[14544] | 1174 | Perl_croak(aTHX_ "Not a subroutine reference in overload table"); |
---|
[10723] | 1175 | return FALSE; |
---|
| 1176 | case SVt_PVCV: |
---|
| 1177 | cv = (CV*)sv; |
---|
| 1178 | break; |
---|
| 1179 | case SVt_PVGV: |
---|
| 1180 | if (!(cv = GvCVu((GV*)sv))) |
---|
[14544] | 1181 | cv = sv_2cv(sv, &stash, &gv, FALSE); |
---|
[10723] | 1182 | break; |
---|
| 1183 | } |
---|
| 1184 | if (cv) filled=1; |
---|
| 1185 | else { |
---|
[14544] | 1186 | Perl_croak(aTHX_ "Method for operation %s not found in package %.256s during blessing\n", |
---|
[10723] | 1187 | cp,HvNAME(stash)); |
---|
| 1188 | return FALSE; |
---|
| 1189 | } |
---|
| 1190 | } |
---|
| 1191 | #else |
---|
| 1192 | { |
---|
| 1193 | int filled = 0; |
---|
| 1194 | int i; |
---|
| 1195 | const char *cp; |
---|
| 1196 | SV* sv = NULL; |
---|
| 1197 | |
---|
[14544] | 1198 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
---|
[10723] | 1199 | |
---|
[14544] | 1200 | if ((cp = PL_AMG_names[0])) { |
---|
[10723] | 1201 | /* Try to find via inheritance. */ |
---|
| 1202 | gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */ |
---|
[14544] | 1203 | if (gv) |
---|
| 1204 | sv = GvSV(gv); |
---|
[10723] | 1205 | |
---|
[14544] | 1206 | if (!gv) |
---|
| 1207 | goto no_table; |
---|
| 1208 | else if (SvTRUE(sv)) |
---|
| 1209 | amt.fallback=AMGfallYES; |
---|
| 1210 | else if (SvOK(sv)) |
---|
| 1211 | amt.fallback=AMGfallNEVER; |
---|
[10723] | 1212 | } |
---|
| 1213 | |
---|
| 1214 | for (i = 1; i < NofAMmeth; i++) { |
---|
[14544] | 1215 | SV *cookie = sv_2mortal(Perl_newSVpvf(aTHX_ "(%s", cp = PL_AMG_names[i])); |
---|
| 1216 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of `%s' in package `%.256s'\n", |
---|
[10723] | 1217 | cp, HvNAME(stash)) ); |
---|
| 1218 | /* don't fill the cache while looking up! */ |
---|
| 1219 | gv = gv_fetchmeth(stash, SvPVX(cookie), SvCUR(cookie), -1); |
---|
| 1220 | cv = 0; |
---|
| 1221 | if(gv && (cv = GvCV(gv))) { |
---|
| 1222 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
---|
| 1223 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { |
---|
| 1224 | /* GvSV contains the name of the method. */ |
---|
| 1225 | GV *ngv; |
---|
| 1226 | |
---|
[14544] | 1227 | DEBUG_o( Perl_deb(aTHX_ "Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", |
---|
| 1228 | SvPV(GvSV(gv), n_a), cp, HvNAME(stash)) ); |
---|
[10723] | 1229 | if (!SvPOK(GvSV(gv)) |
---|
| 1230 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), |
---|
| 1231 | FALSE))) |
---|
| 1232 | { |
---|
| 1233 | /* Can be an import stub (created by `can'). */ |
---|
| 1234 | if (GvCVGEN(gv)) { |
---|
[14544] | 1235 | Perl_croak(aTHX_ "Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", |
---|
[10723] | 1236 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
---|
| 1237 | cp, HvNAME(stash)); |
---|
| 1238 | } else |
---|
[14544] | 1239 | Perl_croak(aTHX_ "Can't resolve method `%.256s' overloading `%s' in package `%.256s'", |
---|
[10723] | 1240 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
---|
| 1241 | cp, HvNAME(stash)); |
---|
| 1242 | } |
---|
| 1243 | cv = GvCV(gv = ngv); |
---|
| 1244 | } |
---|
[14544] | 1245 | DEBUG_o( Perl_deb(aTHX_ "Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", |
---|
[10723] | 1246 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), |
---|
| 1247 | GvNAME(CvGV(cv))) ); |
---|
| 1248 | filled = 1; |
---|
| 1249 | } |
---|
| 1250 | #endif |
---|
| 1251 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
---|
| 1252 | } |
---|
| 1253 | if (filled) { |
---|
| 1254 | AMT_AMAGIC_on(&amt); |
---|
| 1255 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT)); |
---|
| 1256 | return TRUE; |
---|
| 1257 | } |
---|
| 1258 | } |
---|
| 1259 | /* Here we have no table: */ |
---|
| 1260 | no_table: |
---|
| 1261 | AMT_AMAGIC_off(&amt); |
---|
| 1262 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS)); |
---|
| 1263 | return FALSE; |
---|
| 1264 | } |
---|
| 1265 | |
---|
| 1266 | SV* |
---|
[14544] | 1267 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
---|
[10723] | 1268 | { |
---|
[14544] | 1269 | dTHR; |
---|
[10723] | 1270 | MAGIC *mg; |
---|
| 1271 | CV *cv; |
---|
| 1272 | CV **cvp=NULL, **ocvp=NULL; |
---|
| 1273 | AMT *amtp, *oamtp; |
---|
| 1274 | int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; |
---|
[14544] | 1275 | int postpr = 0, force_cpy = 0, assignshift = assign ? 1 : 0; |
---|
[10723] | 1276 | HV* stash; |
---|
| 1277 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
---|
| 1278 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c')) |
---|
| 1279 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
---|
| 1280 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
---|
[14544] | 1281 | : (CV **) NULL)) |
---|
[10723] | 1282 | && ((cv = cvp[off=method+assignshift]) |
---|
| 1283 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
---|
| 1284 | * usual method */ |
---|
| 1285 | (fl = 1, cv = cvp[off=method])))) { |
---|
| 1286 | lr = -1; /* Call method for left argument */ |
---|
| 1287 | } else { |
---|
| 1288 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
---|
| 1289 | int logic; |
---|
| 1290 | |
---|
| 1291 | /* look for substituted methods */ |
---|
[14544] | 1292 | /* In all the covered cases we should be called with assign==0. */ |
---|
[10723] | 1293 | switch (method) { |
---|
| 1294 | case inc_amg: |
---|
[14544] | 1295 | force_cpy = 1; |
---|
| 1296 | if ((cv = cvp[off=add_ass_amg]) |
---|
| 1297 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { |
---|
| 1298 | right = &PL_sv_yes; lr = -1; assign = 1; |
---|
[10723] | 1299 | } |
---|
| 1300 | break; |
---|
| 1301 | case dec_amg: |
---|
[14544] | 1302 | force_cpy = 1; |
---|
| 1303 | if ((cv = cvp[off = subtr_ass_amg]) |
---|
| 1304 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { |
---|
| 1305 | right = &PL_sv_yes; lr = -1; assign = 1; |
---|
[10723] | 1306 | } |
---|
| 1307 | break; |
---|
| 1308 | case bool__amg: |
---|
| 1309 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
---|
| 1310 | break; |
---|
| 1311 | case numer_amg: |
---|
| 1312 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
---|
| 1313 | break; |
---|
| 1314 | case string_amg: |
---|
| 1315 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
---|
| 1316 | break; |
---|
| 1317 | case not_amg: |
---|
| 1318 | (void)((cv = cvp[off=bool__amg]) |
---|
| 1319 | || (cv = cvp[off=numer_amg]) |
---|
| 1320 | || (cv = cvp[off=string_amg])); |
---|
| 1321 | postpr = 1; |
---|
| 1322 | break; |
---|
| 1323 | case copy_amg: |
---|
| 1324 | { |
---|
[14544] | 1325 | /* |
---|
| 1326 | * SV* ref causes confusion with the interpreter variable of |
---|
| 1327 | * the same name |
---|
| 1328 | */ |
---|
| 1329 | SV* tmpRef=SvRV(left); |
---|
| 1330 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
---|
[10723] | 1331 | /* |
---|
| 1332 | * Just to be extra cautious. Maybe in some |
---|
| 1333 | * additional cases sv_setsv is safe, too. |
---|
| 1334 | */ |
---|
[14544] | 1335 | SV* newref = newSVsv(tmpRef); |
---|
[10723] | 1336 | SvOBJECT_on(newref); |
---|
[14544] | 1337 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef)); |
---|
[10723] | 1338 | return newref; |
---|
| 1339 | } |
---|
| 1340 | } |
---|
| 1341 | break; |
---|
| 1342 | case abs_amg: |
---|
| 1343 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
---|
| 1344 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
---|
| 1345 | SV* nullsv=sv_2mortal(newSViv(0)); |
---|
| 1346 | if (off1==lt_amg) { |
---|
| 1347 | SV* lessp = amagic_call(left,nullsv, |
---|
| 1348 | lt_amg,AMGf_noright); |
---|
| 1349 | logic = SvTRUE(lessp); |
---|
| 1350 | } else { |
---|
| 1351 | SV* lessp = amagic_call(left,nullsv, |
---|
| 1352 | ncmp_amg,AMGf_noright); |
---|
| 1353 | logic = (SvNV(lessp) < 0); |
---|
| 1354 | } |
---|
| 1355 | if (logic) { |
---|
| 1356 | if (off==subtr_amg) { |
---|
| 1357 | right = left; |
---|
| 1358 | left = nullsv; |
---|
| 1359 | lr = 1; |
---|
| 1360 | } |
---|
| 1361 | } else { |
---|
| 1362 | return left; |
---|
| 1363 | } |
---|
| 1364 | } |
---|
| 1365 | break; |
---|
| 1366 | case neg_amg: |
---|
[14544] | 1367 | if ((cv = cvp[off=subtr_amg])) { |
---|
[10723] | 1368 | right = left; |
---|
| 1369 | left = sv_2mortal(newSViv(0)); |
---|
| 1370 | lr = 1; |
---|
| 1371 | } |
---|
| 1372 | break; |
---|
[14544] | 1373 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
---|
| 1374 | case to_sv_amg: |
---|
| 1375 | case to_av_amg: |
---|
| 1376 | case to_hv_amg: |
---|
| 1377 | case to_gv_amg: |
---|
| 1378 | case to_cv_amg: |
---|
| 1379 | /* FAIL safe */ |
---|
| 1380 | return NULL; /* Delegate operation to standard mechanisms. */ |
---|
| 1381 | break; |
---|
[10723] | 1382 | default: |
---|
| 1383 | goto not_found; |
---|
| 1384 | } |
---|
| 1385 | if (!cv) goto not_found; |
---|
| 1386 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
---|
| 1387 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c')) |
---|
| 1388 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
---|
| 1389 | ? (amtp = (AMT*)mg->mg_ptr)->table |
---|
[14544] | 1390 | : (CV **) NULL)) |
---|
[10723] | 1391 | && (cv = cvp[off=method])) { /* Method for right |
---|
| 1392 | * argument found */ |
---|
| 1393 | lr=1; |
---|
| 1394 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
---|
| 1395 | && (cvp=ocvp) && (lr = -1)) |
---|
| 1396 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
---|
| 1397 | && !(flags & AMGf_unary)) { |
---|
| 1398 | /* We look for substitution for |
---|
| 1399 | * comparison operations and |
---|
| 1400 | * concatenation */ |
---|
| 1401 | if (method==concat_amg || method==concat_ass_amg |
---|
| 1402 | || method==repeat_amg || method==repeat_ass_amg) { |
---|
| 1403 | return NULL; /* Delegate operation to string conversion */ |
---|
| 1404 | } |
---|
| 1405 | off = -1; |
---|
| 1406 | switch (method) { |
---|
| 1407 | case lt_amg: |
---|
| 1408 | case le_amg: |
---|
| 1409 | case gt_amg: |
---|
| 1410 | case ge_amg: |
---|
| 1411 | case eq_amg: |
---|
| 1412 | case ne_amg: |
---|
| 1413 | postpr = 1; off=ncmp_amg; break; |
---|
| 1414 | case slt_amg: |
---|
| 1415 | case sle_amg: |
---|
| 1416 | case sgt_amg: |
---|
| 1417 | case sge_amg: |
---|
| 1418 | case seq_amg: |
---|
| 1419 | case sne_amg: |
---|
| 1420 | postpr = 1; off=scmp_amg; break; |
---|
| 1421 | } |
---|
| 1422 | if (off != -1) cv = cvp[off]; |
---|
| 1423 | if (!cv) { |
---|
| 1424 | goto not_found; |
---|
| 1425 | } |
---|
| 1426 | } else { |
---|
| 1427 | not_found: /* No method found, either report or croak */ |
---|
| 1428 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
---|
| 1429 | notfound = 1; lr = -1; |
---|
| 1430 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
---|
| 1431 | notfound = 1; lr = 1; |
---|
| 1432 | } else { |
---|
| 1433 | SV *msg; |
---|
| 1434 | if (off==-1) off=method; |
---|
[14544] | 1435 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
---|
[10723] | 1436 | "Operation `%s': no method found,%sargument %s%s%s%s", |
---|
[14544] | 1437 | PL_AMG_names[method + assignshift], |
---|
[10723] | 1438 | (flags & AMGf_unary ? " " : "\n\tleft "), |
---|
| 1439 | SvAMAGIC(left)? |
---|
| 1440 | "in overloaded package ": |
---|
| 1441 | "has no overloaded magic", |
---|
| 1442 | SvAMAGIC(left)? |
---|
| 1443 | HvNAME(SvSTASH(SvRV(left))): |
---|
| 1444 | "", |
---|
| 1445 | SvAMAGIC(right)? |
---|
| 1446 | ",\n\tright argument in overloaded package ": |
---|
| 1447 | (flags & AMGf_unary |
---|
| 1448 | ? "" |
---|
| 1449 | : ",\n\tright argument has no overloaded magic"), |
---|
| 1450 | SvAMAGIC(right)? |
---|
| 1451 | HvNAME(SvSTASH(SvRV(right))): |
---|
| 1452 | "")); |
---|
| 1453 | if (amtp && amtp->fallback >= AMGfallYES) { |
---|
[14544] | 1454 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX(msg)) ); |
---|
[10723] | 1455 | } else { |
---|
[14544] | 1456 | Perl_croak(aTHX_ "%"SVf, msg); |
---|
[10723] | 1457 | } |
---|
| 1458 | return NULL; |
---|
| 1459 | } |
---|
[14544] | 1460 | force_cpy = force_cpy || assign; |
---|
[10723] | 1461 | } |
---|
| 1462 | } |
---|
| 1463 | if (!notfound) { |
---|
[14544] | 1464 | DEBUG_o( Perl_deb(aTHX_ |
---|
[10723] | 1465 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
---|
[14544] | 1466 | PL_AMG_names[off], |
---|
[10723] | 1467 | method+assignshift==off? "" : |
---|
| 1468 | " (initially `", |
---|
| 1469 | method+assignshift==off? "" : |
---|
[14544] | 1470 | PL_AMG_names[method+assignshift], |
---|
[10723] | 1471 | method+assignshift==off? "" : "')", |
---|
| 1472 | flags & AMGf_unary? "" : |
---|
| 1473 | lr==1 ? " for right argument": " for left argument", |
---|
| 1474 | flags & AMGf_unary? " for argument" : "", |
---|
| 1475 | HvNAME(stash), |
---|
| 1476 | fl? ",\n\tassignment variant used": "") ); |
---|
[14544] | 1477 | } |
---|
[10723] | 1478 | /* Since we use shallow copy during assignment, we need |
---|
| 1479 | * to dublicate the contents, probably calling user-supplied |
---|
| 1480 | * version of copy operator |
---|
| 1481 | */ |
---|
[14544] | 1482 | /* We need to copy in following cases: |
---|
| 1483 | * a) Assignment form was called. |
---|
| 1484 | * assignshift==1, assign==T, method + 1 == off |
---|
| 1485 | * b) Increment or decrement, called directly. |
---|
| 1486 | * assignshift==0, assign==0, method + 0 == off |
---|
| 1487 | * c) Increment or decrement, translated to assignment add/subtr. |
---|
| 1488 | * assignshift==0, assign==T, |
---|
| 1489 | * force_cpy == T |
---|
| 1490 | * d) Increment or decrement, translated to nomethod. |
---|
| 1491 | * assignshift==0, assign==0, |
---|
| 1492 | * force_cpy == T |
---|
| 1493 | * e) Assignment form translated to nomethod. |
---|
| 1494 | * assignshift==1, assign==T, method + 1 != off |
---|
| 1495 | * force_cpy == T |
---|
| 1496 | */ |
---|
| 1497 | /* off is method, method+assignshift, or a result of opcode substitution. |
---|
| 1498 | * In the latter case assignshift==0, so only notfound case is important. |
---|
| 1499 | */ |
---|
| 1500 | if (( (method + assignshift == off) |
---|
| 1501 | && (assign || (method == inc_amg) || (method == dec_amg))) |
---|
| 1502 | || force_cpy) |
---|
| 1503 | RvDEEPCP(left); |
---|
[10723] | 1504 | { |
---|
| 1505 | dSP; |
---|
| 1506 | BINOP myop; |
---|
| 1507 | SV* res; |
---|
| 1508 | bool oldcatch = CATCH_GET; |
---|
| 1509 | |
---|
| 1510 | CATCH_SET(TRUE); |
---|
| 1511 | Zero(&myop, 1, BINOP); |
---|
| 1512 | myop.op_last = (OP *) &myop; |
---|
| 1513 | myop.op_next = Nullop; |
---|
| 1514 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
---|
| 1515 | |
---|
[14544] | 1516 | PUSHSTACKi(PERLSI_OVERLOAD); |
---|
[10723] | 1517 | ENTER; |
---|
[14544] | 1518 | SAVEOP(); |
---|
| 1519 | PL_op = (OP *) &myop; |
---|
| 1520 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
---|
| 1521 | PL_op->op_private |= OPpENTERSUB_DB; |
---|
[10723] | 1522 | PUTBACK; |
---|
| 1523 | pp_pushmark(); |
---|
| 1524 | |
---|
[14544] | 1525 | EXTEND(SP, notfound + 5); |
---|
[10723] | 1526 | PUSHs(lr>0? right: left); |
---|
| 1527 | PUSHs(lr>0? left: right); |
---|
[14544] | 1528 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
---|
[10723] | 1529 | if (notfound) { |
---|
[14544] | 1530 | PUSHs( sv_2mortal(newSVpv((char *)PL_AMG_names[method + assignshift],0))); |
---|
[10723] | 1531 | } |
---|
| 1532 | PUSHs((SV*)cv); |
---|
| 1533 | PUTBACK; |
---|
| 1534 | |
---|
[14544] | 1535 | if ((PL_op = Perl_pp_entersub(aTHX))) |
---|
| 1536 | CALLRUNOPS(aTHX); |
---|
[10723] | 1537 | LEAVE; |
---|
| 1538 | SPAGAIN; |
---|
| 1539 | |
---|
| 1540 | res=POPs; |
---|
| 1541 | PUTBACK; |
---|
[14544] | 1542 | POPSTACK; |
---|
[10723] | 1543 | CATCH_SET(oldcatch); |
---|
| 1544 | |
---|
| 1545 | if (postpr) { |
---|
| 1546 | int ans; |
---|
| 1547 | switch (method) { |
---|
| 1548 | case le_amg: |
---|
| 1549 | case sle_amg: |
---|
| 1550 | ans=SvIV(res)<=0; break; |
---|
| 1551 | case lt_amg: |
---|
| 1552 | case slt_amg: |
---|
| 1553 | ans=SvIV(res)<0; break; |
---|
| 1554 | case ge_amg: |
---|
| 1555 | case sge_amg: |
---|
| 1556 | ans=SvIV(res)>=0; break; |
---|
| 1557 | case gt_amg: |
---|
| 1558 | case sgt_amg: |
---|
| 1559 | ans=SvIV(res)>0; break; |
---|
| 1560 | case eq_amg: |
---|
| 1561 | case seq_amg: |
---|
| 1562 | ans=SvIV(res)==0; break; |
---|
| 1563 | case ne_amg: |
---|
| 1564 | case sne_amg: |
---|
| 1565 | ans=SvIV(res)!=0; break; |
---|
| 1566 | case inc_amg: |
---|
| 1567 | case dec_amg: |
---|
| 1568 | SvSetSV(left,res); return left; |
---|
| 1569 | case not_amg: |
---|
[14544] | 1570 | ans=!SvTRUE(res); break; |
---|
[10723] | 1571 | } |
---|
| 1572 | return boolSV(ans); |
---|
| 1573 | } else if (method==copy_amg) { |
---|
| 1574 | if (!SvROK(res)) { |
---|
[14544] | 1575 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
---|
[10723] | 1576 | } |
---|
| 1577 | return SvREFCNT_inc(SvRV(res)); |
---|
| 1578 | } else { |
---|
| 1579 | return res; |
---|
| 1580 | } |
---|
| 1581 | } |
---|
| 1582 | } |
---|