1 | /* gv.c |
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2 | * |
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3 | * Copyright (c) 1991-2001, Larry Wall |
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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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20 | #define PERL_IN_GV_C |
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21 | #include "perl.h" |
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22 | |
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23 | GV * |
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24 | Perl_gv_AVadd(pTHX_ register GV *gv) |
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25 | { |
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26 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
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27 | Perl_croak(aTHX_ "Bad symbol for array"); |
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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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34 | Perl_gv_HVadd(pTHX_ register GV *gv) |
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35 | { |
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36 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
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37 | Perl_croak(aTHX_ "Bad symbol for hash"); |
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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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44 | Perl_gv_IOadd(pTHX_ register GV *gv) |
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45 | { |
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46 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
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47 | Perl_croak(aTHX_ "Bad symbol for filehandle"); |
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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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54 | Perl_gv_fetchfile(pTHX_ const char *name) |
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55 | { |
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56 | char smallbuf[256]; |
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57 | char *tmpbuf; |
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58 | STRLEN tmplen; |
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59 | GV *gv; |
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60 | |
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61 | if (!PL_defstash) |
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62 | return Nullgv; |
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63 | |
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64 | tmplen = strlen(name) + 2; |
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65 | if (tmplen < sizeof smallbuf) |
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66 | tmpbuf = smallbuf; |
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67 | else |
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68 | New(603, tmpbuf, tmplen + 1, char); |
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69 | tmpbuf[0] = '_'; |
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70 | tmpbuf[1] = '<'; |
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71 | strcpy(tmpbuf + 2, name); |
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72 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
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73 | if (!isGV(gv)) { |
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74 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
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75 | sv_setpv(GvSV(gv), name); |
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76 | if (PERLDB_LINE) |
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77 | hv_magic(GvHVn(gv_AVadd(gv)), Nullgv, 'L'); |
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78 | } |
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79 | if (tmpbuf != smallbuf) |
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80 | Safefree(tmpbuf); |
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81 | return gv; |
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82 | } |
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83 | |
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84 | void |
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85 | Perl_gv_init(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, int multi) |
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86 | { |
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87 | register GP *gp; |
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88 | bool doproto = SvTYPE(gv) > SVt_NULL; |
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89 | char *proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL; |
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90 | |
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91 | sv_upgrade((SV*)gv, SVt_PVGV); |
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92 | if (SvLEN(gv)) { |
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93 | if (proto) { |
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94 | SvPVX(gv) = NULL; |
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95 | SvLEN(gv) = 0; |
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96 | SvPOK_off(gv); |
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97 | } else |
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98 | Safefree(SvPVX(gv)); |
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99 | } |
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100 | Newz(602, gp, 1, GP); |
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101 | GvGP(gv) = gp_ref(gp); |
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102 | GvSV(gv) = NEWSV(72,0); |
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103 | GvLINE(gv) = CopLINE(PL_curcop); |
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104 | GvFILE(gv) = CopFILE(PL_curcop) ? CopFILE(PL_curcop) : ""; |
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105 | GvCVGEN(gv) = 0; |
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106 | GvEGV(gv) = gv; |
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107 | sv_magic((SV*)gv, (SV*)gv, '*', Nullch, 0); |
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108 | GvSTASH(gv) = (HV*)SvREFCNT_inc(stash); |
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109 | GvNAME(gv) = savepvn(name, len); |
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110 | GvNAMELEN(gv) = len; |
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111 | if (multi || doproto) /* doproto means it _was_ mentioned */ |
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112 | GvMULTI_on(gv); |
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113 | if (doproto) { /* Replicate part of newSUB here. */ |
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114 | SvIOK_off(gv); |
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115 | ENTER; |
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116 | /* XXX unsafe for threads if eval_owner isn't held */ |
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117 | start_subparse(0,0); /* Create CV in compcv. */ |
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118 | GvCV(gv) = PL_compcv; |
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119 | LEAVE; |
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120 | |
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121 | PL_sub_generation++; |
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122 | CvGV(GvCV(gv)) = gv; |
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123 | CvFILE(GvCV(gv)) = CopFILE(PL_curcop); |
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124 | CvSTASH(GvCV(gv)) = PL_curstash; |
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125 | #ifdef USE_THREADS |
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126 | CvOWNER(GvCV(gv)) = 0; |
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127 | if (!CvMUTEXP(GvCV(gv))) { |
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128 | New(666, CvMUTEXP(GvCV(gv)), 1, perl_mutex); |
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129 | MUTEX_INIT(CvMUTEXP(GvCV(gv))); |
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130 | } |
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131 | #endif /* USE_THREADS */ |
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132 | if (proto) { |
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133 | sv_setpv((SV*)GvCV(gv), proto); |
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134 | Safefree(proto); |
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135 | } |
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136 | } |
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137 | } |
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138 | |
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139 | STATIC void |
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140 | S_gv_init_sv(pTHX_ GV *gv, I32 sv_type) |
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141 | { |
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142 | switch (sv_type) { |
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143 | case SVt_PVIO: |
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144 | (void)GvIOn(gv); |
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145 | break; |
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146 | case SVt_PVAV: |
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147 | (void)GvAVn(gv); |
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148 | break; |
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149 | case SVt_PVHV: |
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150 | (void)GvHVn(gv); |
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151 | break; |
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152 | } |
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153 | } |
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154 | |
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155 | /* |
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156 | =for apidoc gv_fetchmeth |
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157 | |
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158 | Returns the glob with the given C<name> and a defined subroutine or |
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159 | C<NULL>. The glob lives in the given C<stash>, or in the stashes |
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160 | accessible via @ISA and @UNIVERSAL. |
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161 | |
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162 | The argument C<level> should be either 0 or -1. If C<level==0>, as a |
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163 | side-effect creates a glob with the given C<name> in the given C<stash> |
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164 | which in the case of success contains an alias for the subroutine, and sets |
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165 | up caching info for this glob. Similarly for all the searched stashes. |
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166 | |
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167 | This function grants C<"SUPER"> token as a postfix of the stash name. The |
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168 | GV returned from C<gv_fetchmeth> may be a method cache entry, which is not |
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169 | visible to Perl code. So when calling C<call_sv>, you should not use |
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170 | the GV directly; instead, you should use the method's CV, which can be |
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171 | obtained from the GV with the C<GvCV> macro. |
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172 | |
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173 | =cut |
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174 | */ |
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175 | |
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176 | GV * |
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177 | Perl_gv_fetchmeth(pTHX_ HV *stash, const char *name, STRLEN len, I32 level) |
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178 | { |
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179 | AV* av; |
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180 | GV* topgv; |
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181 | GV* gv; |
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182 | GV** gvp; |
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183 | CV* cv; |
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184 | |
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185 | if (!stash) |
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186 | return 0; |
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187 | if ((level > 100) || (level < -100)) |
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188 | Perl_croak(aTHX_ "Recursive inheritance detected while looking for method '%s' in package '%s'", |
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189 | name, HvNAME(stash)); |
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190 | |
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191 | DEBUG_o( Perl_deb(aTHX_ "Looking for method %s in package %s\n",name,HvNAME(stash)) ); |
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192 | |
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193 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
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194 | if (!gvp) |
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195 | topgv = Nullgv; |
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196 | else { |
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197 | topgv = *gvp; |
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198 | if (SvTYPE(topgv) != SVt_PVGV) |
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199 | gv_init(topgv, stash, name, len, TRUE); |
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200 | if ((cv = GvCV(topgv))) { |
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201 | /* If genuine method or valid cache entry, use it */ |
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202 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) |
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203 | return topgv; |
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204 | /* Stale cached entry: junk it */ |
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205 | SvREFCNT_dec(cv); |
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206 | GvCV(topgv) = cv = Nullcv; |
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207 | GvCVGEN(topgv) = 0; |
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208 | } |
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209 | else if (GvCVGEN(topgv) == PL_sub_generation) |
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210 | return 0; /* cache indicates sub doesn't exist */ |
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211 | } |
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212 | |
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213 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
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214 | av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav; |
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215 | |
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216 | /* create and re-create @.*::SUPER::ISA on demand */ |
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217 | if (!av || !SvMAGIC(av)) { |
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218 | char* packname = HvNAME(stash); |
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219 | STRLEN packlen = strlen(packname); |
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220 | |
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221 | if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) { |
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222 | HV* basestash; |
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223 | |
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224 | packlen -= 7; |
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225 | basestash = gv_stashpvn(packname, packlen, TRUE); |
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226 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); |
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227 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
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228 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
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229 | if (!gvp || !(gv = *gvp)) |
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230 | Perl_croak(aTHX_ "Cannot create %s::ISA", HvNAME(stash)); |
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231 | if (SvTYPE(gv) != SVt_PVGV) |
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232 | gv_init(gv, stash, "ISA", 3, TRUE); |
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233 | SvREFCNT_dec(GvAV(gv)); |
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234 | GvAV(gv) = (AV*)SvREFCNT_inc(av); |
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235 | } |
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236 | } |
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237 | } |
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238 | |
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239 | if (av) { |
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240 | SV** svp = AvARRAY(av); |
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241 | /* NOTE: No support for tied ISA */ |
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242 | I32 items = AvFILLp(av) + 1; |
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243 | while (items--) { |
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244 | SV* sv = *svp++; |
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245 | HV* basestash = gv_stashsv(sv, FALSE); |
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246 | if (!basestash) { |
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247 | if (ckWARN(WARN_MISC)) |
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248 | Perl_warner(aTHX_ WARN_MISC, "Can't locate package %s for @%s::ISA", |
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249 | SvPVX(sv), HvNAME(stash)); |
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250 | continue; |
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251 | } |
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252 | gv = gv_fetchmeth(basestash, name, len, |
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253 | (level >= 0) ? level + 1 : level - 1); |
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254 | if (gv) |
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255 | goto gotcha; |
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256 | } |
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257 | } |
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258 | |
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259 | /* if at top level, try UNIVERSAL */ |
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260 | |
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261 | if (level == 0 || level == -1) { |
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262 | HV* lastchance; |
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263 | |
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264 | if ((lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE))) { |
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265 | if ((gv = gv_fetchmeth(lastchance, name, len, |
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266 | (level >= 0) ? level + 1 : level - 1))) |
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267 | { |
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268 | gotcha: |
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269 | /* |
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270 | * Cache method in topgv if: |
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271 | * 1. topgv has no synonyms (else inheritance crosses wires) |
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272 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
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273 | */ |
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274 | if (topgv && |
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275 | GvREFCNT(topgv) == 1 && |
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276 | (cv = GvCV(gv)) && |
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277 | (CvROOT(cv) || CvXSUB(cv))) |
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278 | { |
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279 | if ((cv = GvCV(topgv))) |
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280 | SvREFCNT_dec(cv); |
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281 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
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282 | GvCVGEN(topgv) = PL_sub_generation; |
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283 | } |
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284 | return gv; |
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285 | } |
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286 | else if (topgv && GvREFCNT(topgv) == 1) { |
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287 | /* cache the fact that the method is not defined */ |
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288 | GvCVGEN(topgv) = PL_sub_generation; |
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289 | } |
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290 | } |
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291 | } |
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292 | |
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293 | return 0; |
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294 | } |
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295 | |
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296 | /* |
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297 | =for apidoc gv_fetchmethod |
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298 | |
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299 | See L<gv_fetchmethod_autoload>. |
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300 | |
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301 | =cut |
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302 | */ |
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303 | |
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304 | GV * |
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305 | Perl_gv_fetchmethod(pTHX_ HV *stash, const char *name) |
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306 | { |
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307 | return gv_fetchmethod_autoload(stash, name, TRUE); |
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308 | } |
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309 | |
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310 | /* |
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311 | =for apidoc gv_fetchmethod_autoload |
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312 | |
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313 | Returns the glob which contains the subroutine to call to invoke the method |
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314 | on the C<stash>. In fact in the presence of autoloading this may be the |
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315 | glob for "AUTOLOAD". In this case the corresponding variable $AUTOLOAD is |
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316 | already setup. |
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317 | |
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318 | The third parameter of C<gv_fetchmethod_autoload> determines whether |
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319 | AUTOLOAD lookup is performed if the given method is not present: non-zero |
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320 | means yes, look for AUTOLOAD; zero means no, don't look for AUTOLOAD. |
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321 | Calling C<gv_fetchmethod> is equivalent to calling C<gv_fetchmethod_autoload> |
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322 | with a non-zero C<autoload> parameter. |
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323 | |
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324 | These functions grant C<"SUPER"> token as a prefix of the method name. Note |
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325 | that if you want to keep the returned glob for a long time, you need to |
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326 | check for it being "AUTOLOAD", since at the later time the call may load a |
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327 | different subroutine due to $AUTOLOAD changing its value. Use the glob |
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328 | created via a side effect to do this. |
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329 | |
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330 | These functions have the same side-effects and as C<gv_fetchmeth> with |
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331 | C<level==0>. C<name> should be writable if contains C<':'> or C<' |
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332 | ''>. The warning against passing the GV returned by C<gv_fetchmeth> to |
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333 | C<call_sv> apply equally to these functions. |
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334 | |
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335 | =cut |
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336 | */ |
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337 | |
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338 | GV * |
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339 | Perl_gv_fetchmethod_autoload(pTHX_ HV *stash, const char *name, I32 autoload) |
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340 | { |
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341 | register const char *nend; |
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342 | const char *nsplit = 0; |
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343 | GV* gv; |
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344 | |
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345 | for (nend = name; *nend; nend++) { |
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346 | if (*nend == '\'') |
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347 | nsplit = nend; |
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348 | else if (*nend == ':' && *(nend + 1) == ':') |
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349 | nsplit = ++nend; |
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350 | } |
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351 | if (nsplit) { |
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352 | const char *origname = name; |
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353 | name = nsplit + 1; |
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354 | if (*nsplit == ':') |
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355 | --nsplit; |
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356 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
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357 | /* ->SUPER::method should really be looked up in original stash */ |
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358 | SV *tmpstr = sv_2mortal(Perl_newSVpvf(aTHX_ "%s::SUPER", |
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359 | CopSTASHPV(PL_curcop))); |
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360 | stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); |
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361 | DEBUG_o( Perl_deb(aTHX_ "Treating %s as %s::%s\n", |
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362 | origname, HvNAME(stash), name) ); |
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363 | } |
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364 | else |
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365 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); |
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366 | } |
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367 | |
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368 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
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369 | if (!gv) { |
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370 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
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371 | gv = (GV*)&PL_sv_yes; |
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372 | else if (autoload) |
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373 | gv = gv_autoload4(stash, name, nend - name, TRUE); |
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374 | } |
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375 | else if (autoload) { |
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376 | CV* cv = GvCV(gv); |
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377 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
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378 | GV* stubgv; |
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379 | GV* autogv; |
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380 | |
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381 | if (CvANON(cv)) |
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382 | stubgv = gv; |
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383 | else { |
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384 | stubgv = CvGV(cv); |
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385 | if (GvCV(stubgv) != cv) /* orphaned import */ |
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386 | stubgv = gv; |
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387 | } |
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388 | autogv = gv_autoload4(GvSTASH(stubgv), |
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389 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
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390 | if (autogv) |
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391 | gv = autogv; |
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392 | } |
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393 | } |
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394 | |
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395 | return gv; |
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396 | } |
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397 | |
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398 | GV* |
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399 | Perl_gv_autoload4(pTHX_ HV *stash, const char *name, STRLEN len, I32 method) |
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400 | { |
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401 | static char autoload[] = "AUTOLOAD"; |
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402 | static STRLEN autolen = 8; |
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403 | GV* gv; |
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404 | CV* cv; |
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405 | HV* varstash; |
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406 | GV* vargv; |
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407 | SV* varsv; |
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408 | |
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409 | if (len == autolen && strnEQ(name, autoload, autolen)) |
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410 | return Nullgv; |
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411 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
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412 | return Nullgv; |
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413 | cv = GvCV(gv); |
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414 | |
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415 | if (!CvROOT(cv)) |
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416 | return Nullgv; |
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417 | |
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418 | /* |
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419 | * Inheriting AUTOLOAD for non-methods works ... for now. |
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420 | */ |
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421 | if (ckWARN(WARN_DEPRECATED) && !method && |
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422 | (GvCVGEN(gv) || GvSTASH(gv) != stash)) |
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423 | Perl_warner(aTHX_ WARN_DEPRECATED, |
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424 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
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425 | HvNAME(stash), (int)len, name); |
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426 | |
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427 | /* |
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428 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
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429 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
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430 | * use that, but for lack of anything better we will use the sub's |
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431 | * original package to look up $AUTOLOAD. |
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432 | */ |
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433 | varstash = GvSTASH(CvGV(cv)); |
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434 | vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); |
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435 | ENTER; |
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436 | |
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437 | #ifdef USE_THREADS |
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438 | sv_lock((SV *)varstash); |
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439 | #endif |
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440 | if (!isGV(vargv)) |
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441 | gv_init(vargv, varstash, autoload, autolen, FALSE); |
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442 | LEAVE; |
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443 | varsv = GvSV(vargv); |
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444 | #ifdef USE_THREADS |
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445 | sv_lock(varsv); |
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446 | #endif |
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447 | sv_setpv(varsv, HvNAME(stash)); |
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448 | sv_catpvn(varsv, "::", 2); |
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449 | sv_catpvn(varsv, name, len); |
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450 | SvTAINTED_off(varsv); |
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451 | return gv; |
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452 | } |
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453 | |
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454 | /* |
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455 | =for apidoc gv_stashpv |
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456 | |
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457 | Returns a pointer to the stash for a specified package. C<name> should |
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458 | be a valid UTF-8 string. If C<create> is set then the package will be |
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459 | created if it does not already exist. If C<create> is not set and the |
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460 | package does not exist then NULL is returned. |
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461 | |
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462 | =cut |
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463 | */ |
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464 | |
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465 | HV* |
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466 | Perl_gv_stashpv(pTHX_ const char *name, I32 create) |
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467 | { |
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468 | return gv_stashpvn(name, strlen(name), create); |
---|
469 | } |
---|
470 | |
---|
471 | HV* |
---|
472 | Perl_gv_stashpvn(pTHX_ const char *name, U32 namelen, I32 create) |
---|
473 | { |
---|
474 | char smallbuf[256]; |
---|
475 | char *tmpbuf; |
---|
476 | HV *stash; |
---|
477 | GV *tmpgv; |
---|
478 | |
---|
479 | if (namelen + 3 < sizeof smallbuf) |
---|
480 | tmpbuf = smallbuf; |
---|
481 | else |
---|
482 | New(606, tmpbuf, namelen + 3, char); |
---|
483 | Copy(name,tmpbuf,namelen,char); |
---|
484 | tmpbuf[namelen++] = ':'; |
---|
485 | tmpbuf[namelen++] = ':'; |
---|
486 | tmpbuf[namelen] = '\0'; |
---|
487 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
---|
488 | if (tmpbuf != smallbuf) |
---|
489 | Safefree(tmpbuf); |
---|
490 | if (!tmpgv) |
---|
491 | return 0; |
---|
492 | if (!GvHV(tmpgv)) |
---|
493 | GvHV(tmpgv) = newHV(); |
---|
494 | stash = GvHV(tmpgv); |
---|
495 | if (!HvNAME(stash)) |
---|
496 | HvNAME(stash) = savepv(name); |
---|
497 | return stash; |
---|
498 | } |
---|
499 | |
---|
500 | /* |
---|
501 | =for apidoc gv_stashsv |
---|
502 | |
---|
503 | Returns a pointer to the stash for a specified package, which must be a |
---|
504 | valid UTF-8 string. See C<gv_stashpv>. |
---|
505 | |
---|
506 | =cut |
---|
507 | */ |
---|
508 | |
---|
509 | HV* |
---|
510 | Perl_gv_stashsv(pTHX_ SV *sv, I32 create) |
---|
511 | { |
---|
512 | register char *ptr; |
---|
513 | STRLEN len; |
---|
514 | ptr = SvPV(sv,len); |
---|
515 | return gv_stashpvn(ptr, len, create); |
---|
516 | } |
---|
517 | |
---|
518 | |
---|
519 | GV * |
---|
520 | Perl_gv_fetchpv(pTHX_ const char *nambeg, I32 add, I32 sv_type) |
---|
521 | { |
---|
522 | register const char *name = nambeg; |
---|
523 | register GV *gv = 0; |
---|
524 | GV**gvp; |
---|
525 | I32 len; |
---|
526 | register const char *namend; |
---|
527 | HV *stash = 0; |
---|
528 | |
---|
529 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
---|
530 | name++; |
---|
531 | |
---|
532 | for (namend = name; *namend; namend++) { |
---|
533 | if ((*namend == ':' && namend[1] == ':') |
---|
534 | || (*namend == '\'' && namend[1])) |
---|
535 | { |
---|
536 | if (!stash) |
---|
537 | stash = PL_defstash; |
---|
538 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
---|
539 | return Nullgv; |
---|
540 | |
---|
541 | len = namend - name; |
---|
542 | if (len > 0) { |
---|
543 | char smallbuf[256]; |
---|
544 | char *tmpbuf; |
---|
545 | |
---|
546 | if (len + 3 < sizeof smallbuf) |
---|
547 | tmpbuf = smallbuf; |
---|
548 | else |
---|
549 | New(601, tmpbuf, len+3, char); |
---|
550 | Copy(name, tmpbuf, len, char); |
---|
551 | tmpbuf[len++] = ':'; |
---|
552 | tmpbuf[len++] = ':'; |
---|
553 | tmpbuf[len] = '\0'; |
---|
554 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
---|
555 | gv = gvp ? *gvp : Nullgv; |
---|
556 | if (gv && gv != (GV*)&PL_sv_undef) { |
---|
557 | if (SvTYPE(gv) != SVt_PVGV) |
---|
558 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
---|
559 | else |
---|
560 | GvMULTI_on(gv); |
---|
561 | } |
---|
562 | if (tmpbuf != smallbuf) |
---|
563 | Safefree(tmpbuf); |
---|
564 | if (!gv || gv == (GV*)&PL_sv_undef) |
---|
565 | return Nullgv; |
---|
566 | |
---|
567 | if (!(stash = GvHV(gv))) |
---|
568 | stash = GvHV(gv) = newHV(); |
---|
569 | |
---|
570 | if (!HvNAME(stash)) |
---|
571 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
---|
572 | } |
---|
573 | |
---|
574 | if (*namend == ':') |
---|
575 | namend++; |
---|
576 | namend++; |
---|
577 | name = namend; |
---|
578 | if (!*name) |
---|
579 | return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE); |
---|
580 | } |
---|
581 | } |
---|
582 | len = namend - name; |
---|
583 | if (!len) |
---|
584 | len = 1; |
---|
585 | |
---|
586 | /* No stash in name, so see how we can default */ |
---|
587 | |
---|
588 | if (!stash) { |
---|
589 | if (isIDFIRST_lazy(name)) { |
---|
590 | bool global = FALSE; |
---|
591 | |
---|
592 | if (isUPPER(*name)) { |
---|
593 | if (*name == 'S' && ( |
---|
594 | strEQ(name, "SIG") || |
---|
595 | strEQ(name, "STDIN") || |
---|
596 | strEQ(name, "STDOUT") || |
---|
597 | strEQ(name, "STDERR"))) |
---|
598 | global = TRUE; |
---|
599 | else if (*name == 'I' && strEQ(name, "INC")) |
---|
600 | global = TRUE; |
---|
601 | else if (*name == 'E' && strEQ(name, "ENV")) |
---|
602 | global = TRUE; |
---|
603 | else if (*name == 'A' && ( |
---|
604 | strEQ(name, "ARGV") || |
---|
605 | strEQ(name, "ARGVOUT"))) |
---|
606 | global = TRUE; |
---|
607 | } |
---|
608 | else if (*name == '_' && !name[1]) |
---|
609 | global = TRUE; |
---|
610 | |
---|
611 | if (global) |
---|
612 | stash = PL_defstash; |
---|
613 | else if ((COP*)PL_curcop == &PL_compiling) { |
---|
614 | stash = PL_curstash; |
---|
615 | if (add && (PL_hints & HINT_STRICT_VARS) && |
---|
616 | sv_type != SVt_PVCV && |
---|
617 | sv_type != SVt_PVGV && |
---|
618 | sv_type != SVt_PVFM && |
---|
619 | sv_type != SVt_PVIO && |
---|
620 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
---|
621 | { |
---|
622 | gvp = (GV**)hv_fetch(stash,name,len,0); |
---|
623 | if (!gvp || |
---|
624 | *gvp == (GV*)&PL_sv_undef || |
---|
625 | SvTYPE(*gvp) != SVt_PVGV) |
---|
626 | { |
---|
627 | stash = 0; |
---|
628 | } |
---|
629 | else if ((sv_type == SVt_PV && !GvIMPORTED_SV(*gvp)) || |
---|
630 | (sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp)) || |
---|
631 | (sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp)) ) |
---|
632 | { |
---|
633 | Perl_warn(aTHX_ "Variable \"%c%s\" is not imported", |
---|
634 | sv_type == SVt_PVAV ? '@' : |
---|
635 | sv_type == SVt_PVHV ? '%' : '$', |
---|
636 | name); |
---|
637 | if (GvCVu(*gvp)) |
---|
638 | Perl_warn(aTHX_ "\t(Did you mean &%s instead?)\n", name); |
---|
639 | stash = 0; |
---|
640 | } |
---|
641 | } |
---|
642 | } |
---|
643 | else |
---|
644 | stash = CopSTASH(PL_curcop); |
---|
645 | } |
---|
646 | else |
---|
647 | stash = PL_defstash; |
---|
648 | } |
---|
649 | |
---|
650 | /* By this point we should have a stash and a name */ |
---|
651 | |
---|
652 | if (!stash) { |
---|
653 | if (add) { |
---|
654 | qerror(Perl_mess(aTHX_ |
---|
655 | "Global symbol \"%s%s\" requires explicit package name", |
---|
656 | (sv_type == SVt_PV ? "$" |
---|
657 | : sv_type == SVt_PVAV ? "@" |
---|
658 | : sv_type == SVt_PVHV ? "%" |
---|
659 | : ""), name)); |
---|
660 | stash = PL_nullstash; |
---|
661 | } |
---|
662 | else |
---|
663 | return Nullgv; |
---|
664 | } |
---|
665 | |
---|
666 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
---|
667 | return Nullgv; |
---|
668 | |
---|
669 | gvp = (GV**)hv_fetch(stash,name,len,add); |
---|
670 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
---|
671 | return Nullgv; |
---|
672 | gv = *gvp; |
---|
673 | if (SvTYPE(gv) == SVt_PVGV) { |
---|
674 | if (add) { |
---|
675 | GvMULTI_on(gv); |
---|
676 | gv_init_sv(gv, sv_type); |
---|
677 | } |
---|
678 | return gv; |
---|
679 | } else if (add & GV_NOINIT) { |
---|
680 | return gv; |
---|
681 | } |
---|
682 | |
---|
683 | /* Adding a new symbol */ |
---|
684 | |
---|
685 | if (add & GV_ADDWARN && ckWARN_d(WARN_INTERNAL)) |
---|
686 | Perl_warner(aTHX_ WARN_INTERNAL, "Had to create %s unexpectedly", nambeg); |
---|
687 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
---|
688 | gv_init_sv(gv, sv_type); |
---|
689 | |
---|
690 | if (isALPHA(name[0]) && ! (isLEXWARN_on ? ckWARN(WARN_ONCE) |
---|
691 | : (PL_dowarn & G_WARN_ON ) ) ) |
---|
692 | GvMULTI_on(gv) ; |
---|
693 | |
---|
694 | /* set up magic where warranted */ |
---|
695 | switch (*name) { |
---|
696 | case 'A': |
---|
697 | if (strEQ(name, "ARGV")) { |
---|
698 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
---|
699 | } |
---|
700 | break; |
---|
701 | case 'E': |
---|
702 | if (strnEQ(name, "EXPORT", 6)) |
---|
703 | GvMULTI_on(gv); |
---|
704 | break; |
---|
705 | case 'I': |
---|
706 | if (strEQ(name, "ISA")) { |
---|
707 | AV* av = GvAVn(gv); |
---|
708 | GvMULTI_on(gv); |
---|
709 | sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0); |
---|
710 | /* NOTE: No support for tied ISA */ |
---|
711 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
---|
712 | && AvFILLp(av) == -1) |
---|
713 | { |
---|
714 | char *pname; |
---|
715 | av_push(av, newSVpvn(pname = "NDBM_File",9)); |
---|
716 | gv_stashpvn(pname, 9, TRUE); |
---|
717 | av_push(av, newSVpvn(pname = "DB_File",7)); |
---|
718 | gv_stashpvn(pname, 7, TRUE); |
---|
719 | av_push(av, newSVpvn(pname = "GDBM_File",9)); |
---|
720 | gv_stashpvn(pname, 9, TRUE); |
---|
721 | av_push(av, newSVpvn(pname = "SDBM_File",9)); |
---|
722 | gv_stashpvn(pname, 9, TRUE); |
---|
723 | av_push(av, newSVpvn(pname = "ODBM_File",9)); |
---|
724 | gv_stashpvn(pname, 9, TRUE); |
---|
725 | } |
---|
726 | } |
---|
727 | break; |
---|
728 | case 'O': |
---|
729 | if (strEQ(name, "OVERLOAD")) { |
---|
730 | HV* hv = GvHVn(gv); |
---|
731 | GvMULTI_on(gv); |
---|
732 | hv_magic(hv, Nullgv, 'A'); |
---|
733 | } |
---|
734 | break; |
---|
735 | case 'S': |
---|
736 | if (strEQ(name, "SIG")) { |
---|
737 | HV *hv; |
---|
738 | I32 i; |
---|
739 | if (!PL_psig_ptr) { |
---|
740 | int sig_num[] = { SIG_NUM }; |
---|
741 | New(73, PL_psig_ptr, sizeof(sig_num)/sizeof(*sig_num), SV*); |
---|
742 | New(73, PL_psig_name, sizeof(sig_num)/sizeof(*sig_num), SV*); |
---|
743 | } |
---|
744 | GvMULTI_on(gv); |
---|
745 | hv = GvHVn(gv); |
---|
746 | hv_magic(hv, Nullgv, 'S'); |
---|
747 | for (i = 1; PL_sig_name[i]; i++) { |
---|
748 | SV ** init; |
---|
749 | init = hv_fetch(hv, PL_sig_name[i], strlen(PL_sig_name[i]), 1); |
---|
750 | if (init) |
---|
751 | sv_setsv(*init, &PL_sv_undef); |
---|
752 | PL_psig_ptr[i] = 0; |
---|
753 | PL_psig_name[i] = 0; |
---|
754 | } |
---|
755 | } |
---|
756 | break; |
---|
757 | case 'V': |
---|
758 | if (strEQ(name, "VERSION")) |
---|
759 | GvMULTI_on(gv); |
---|
760 | break; |
---|
761 | |
---|
762 | case '&': |
---|
763 | if (len > 1) |
---|
764 | break; |
---|
765 | PL_sawampersand = TRUE; |
---|
766 | goto ro_magicalize; |
---|
767 | |
---|
768 | case '`': |
---|
769 | if (len > 1) |
---|
770 | break; |
---|
771 | PL_sawampersand = TRUE; |
---|
772 | goto ro_magicalize; |
---|
773 | |
---|
774 | case '\'': |
---|
775 | if (len > 1) |
---|
776 | break; |
---|
777 | PL_sawampersand = TRUE; |
---|
778 | goto ro_magicalize; |
---|
779 | |
---|
780 | case ':': |
---|
781 | if (len > 1) |
---|
782 | break; |
---|
783 | sv_setpv(GvSV(gv),PL_chopset); |
---|
784 | goto magicalize; |
---|
785 | |
---|
786 | case '?': |
---|
787 | if (len > 1) |
---|
788 | break; |
---|
789 | #ifdef COMPLEX_STATUS |
---|
790 | (void)SvUPGRADE(GvSV(gv), SVt_PVLV); |
---|
791 | #endif |
---|
792 | goto magicalize; |
---|
793 | |
---|
794 | case '!': |
---|
795 | if (len > 1) |
---|
796 | break; |
---|
797 | if (sv_type > SVt_PV && PL_curcop != &PL_compiling) { |
---|
798 | HV* stash = gv_stashpvn("Errno",5,FALSE); |
---|
799 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { |
---|
800 | dSP; |
---|
801 | PUTBACK; |
---|
802 | require_pv("Errno.pm"); |
---|
803 | SPAGAIN; |
---|
804 | stash = gv_stashpvn("Errno",5,FALSE); |
---|
805 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) |
---|
806 | Perl_croak(aTHX_ "Can't use %%! because Errno.pm is not available"); |
---|
807 | } |
---|
808 | } |
---|
809 | goto magicalize; |
---|
810 | case '-': |
---|
811 | if (len > 1) |
---|
812 | break; |
---|
813 | else { |
---|
814 | AV* av = GvAVn(gv); |
---|
815 | sv_magic((SV*)av, Nullsv, 'D', Nullch, 0); |
---|
816 | SvREADONLY_on(av); |
---|
817 | } |
---|
818 | goto magicalize; |
---|
819 | case '#': |
---|
820 | case '*': |
---|
821 | if (ckWARN(WARN_DEPRECATED) && len == 1 && sv_type == SVt_PV) |
---|
822 | Perl_warner(aTHX_ WARN_DEPRECATED, "Use of $%s is deprecated", name); |
---|
823 | /* FALL THROUGH */ |
---|
824 | case '[': |
---|
825 | case '^': |
---|
826 | case '~': |
---|
827 | case '=': |
---|
828 | case '%': |
---|
829 | case '.': |
---|
830 | case '(': |
---|
831 | case ')': |
---|
832 | case '<': |
---|
833 | case '>': |
---|
834 | case ',': |
---|
835 | case '\\': |
---|
836 | case '/': |
---|
837 | case '\001': /* $^A */ |
---|
838 | case '\003': /* $^C */ |
---|
839 | case '\004': /* $^D */ |
---|
840 | case '\005': /* $^E */ |
---|
841 | case '\006': /* $^F */ |
---|
842 | case '\010': /* $^H */ |
---|
843 | case '\011': /* $^I, NOT \t in EBCDIC */ |
---|
844 | case '\017': /* $^O */ |
---|
845 | case '\020': /* $^P */ |
---|
846 | case '\024': /* $^T */ |
---|
847 | if (len > 1) |
---|
848 | break; |
---|
849 | goto magicalize; |
---|
850 | case '|': |
---|
851 | if (len > 1) |
---|
852 | break; |
---|
853 | sv_setiv(GvSV(gv), (IV)(IoFLAGS(GvIOp(PL_defoutgv)) & IOf_FLUSH) != 0); |
---|
854 | goto magicalize; |
---|
855 | case '\023': /* $^S */ |
---|
856 | if (len > 1) |
---|
857 | break; |
---|
858 | goto ro_magicalize; |
---|
859 | case '\027': /* $^W & $^WARNING_BITS */ |
---|
860 | if (len > 1 && strNE(name, "\027ARNING_BITS") |
---|
861 | && strNE(name, "\027IDE_SYSTEM_CALLS")) |
---|
862 | break; |
---|
863 | goto magicalize; |
---|
864 | |
---|
865 | case '+': |
---|
866 | if (len > 1) |
---|
867 | break; |
---|
868 | else { |
---|
869 | AV* av = GvAVn(gv); |
---|
870 | sv_magic((SV*)av, (SV*)av, 'D', Nullch, 0); |
---|
871 | SvREADONLY_on(av); |
---|
872 | } |
---|
873 | /* FALL THROUGH */ |
---|
874 | case '1': |
---|
875 | case '2': |
---|
876 | case '3': |
---|
877 | case '4': |
---|
878 | case '5': |
---|
879 | case '6': |
---|
880 | case '7': |
---|
881 | case '8': |
---|
882 | case '9': |
---|
883 | ro_magicalize: |
---|
884 | SvREADONLY_on(GvSV(gv)); |
---|
885 | magicalize: |
---|
886 | sv_magic(GvSV(gv), (SV*)gv, 0, name, len); |
---|
887 | break; |
---|
888 | |
---|
889 | case '\014': /* $^L */ |
---|
890 | if (len > 1) |
---|
891 | break; |
---|
892 | sv_setpv(GvSV(gv),"\f"); |
---|
893 | PL_formfeed = GvSV(gv); |
---|
894 | break; |
---|
895 | case ';': |
---|
896 | if (len > 1) |
---|
897 | break; |
---|
898 | sv_setpv(GvSV(gv),"\034"); |
---|
899 | break; |
---|
900 | case ']': |
---|
901 | if (len == 1) { |
---|
902 | SV *sv = GvSV(gv); |
---|
903 | (void)SvUPGRADE(sv, SVt_PVNV); |
---|
904 | Perl_sv_setpvf(aTHX_ sv, |
---|
905 | #if defined(PERL_SUBVERSION) && (PERL_SUBVERSION > 0) |
---|
906 | "%8.6" |
---|
907 | #else |
---|
908 | "%5.3" |
---|
909 | #endif |
---|
910 | NVff, |
---|
911 | SvNVX(PL_patchlevel)); |
---|
912 | SvNVX(sv) = SvNVX(PL_patchlevel); |
---|
913 | SvNOK_on(sv); |
---|
914 | SvREADONLY_on(sv); |
---|
915 | } |
---|
916 | break; |
---|
917 | case '\026': /* $^V */ |
---|
918 | if (len == 1) { |
---|
919 | SV *sv = GvSV(gv); |
---|
920 | GvSV(gv) = SvREFCNT_inc(PL_patchlevel); |
---|
921 | SvREFCNT_dec(sv); |
---|
922 | } |
---|
923 | break; |
---|
924 | } |
---|
925 | return gv; |
---|
926 | } |
---|
927 | |
---|
928 | void |
---|
929 | Perl_gv_fullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain) |
---|
930 | { |
---|
931 | HV *hv = GvSTASH(gv); |
---|
932 | if (!hv) { |
---|
933 | (void)SvOK_off(sv); |
---|
934 | return; |
---|
935 | } |
---|
936 | sv_setpv(sv, prefix ? prefix : ""); |
---|
937 | if (keepmain || strNE(HvNAME(hv), "main")) { |
---|
938 | sv_catpv(sv,HvNAME(hv)); |
---|
939 | sv_catpvn(sv,"::", 2); |
---|
940 | } |
---|
941 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
---|
942 | } |
---|
943 | |
---|
944 | void |
---|
945 | Perl_gv_fullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
---|
946 | { |
---|
947 | HV *hv = GvSTASH(gv); |
---|
948 | if (!hv) { |
---|
949 | (void)SvOK_off(sv); |
---|
950 | return; |
---|
951 | } |
---|
952 | sv_setpv(sv, prefix ? prefix : ""); |
---|
953 | sv_catpv(sv,HvNAME(hv)); |
---|
954 | sv_catpvn(sv,"::", 2); |
---|
955 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
---|
956 | } |
---|
957 | |
---|
958 | void |
---|
959 | Perl_gv_efullname4(pTHX_ SV *sv, GV *gv, const char *prefix, bool keepmain) |
---|
960 | { |
---|
961 | GV *egv = GvEGV(gv); |
---|
962 | if (!egv) |
---|
963 | egv = gv; |
---|
964 | gv_fullname4(sv, egv, prefix, keepmain); |
---|
965 | } |
---|
966 | |
---|
967 | void |
---|
968 | Perl_gv_efullname3(pTHX_ SV *sv, GV *gv, const char *prefix) |
---|
969 | { |
---|
970 | GV *egv = GvEGV(gv); |
---|
971 | if (!egv) |
---|
972 | egv = gv; |
---|
973 | gv_fullname3(sv, egv, prefix); |
---|
974 | } |
---|
975 | |
---|
976 | /* XXX compatibility with versions <= 5.003. */ |
---|
977 | void |
---|
978 | Perl_gv_fullname(pTHX_ SV *sv, GV *gv) |
---|
979 | { |
---|
980 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
---|
981 | } |
---|
982 | |
---|
983 | /* XXX compatibility with versions <= 5.003. */ |
---|
984 | void |
---|
985 | Perl_gv_efullname(pTHX_ SV *sv, GV *gv) |
---|
986 | { |
---|
987 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
---|
988 | } |
---|
989 | |
---|
990 | IO * |
---|
991 | Perl_newIO(pTHX) |
---|
992 | { |
---|
993 | IO *io; |
---|
994 | GV *iogv; |
---|
995 | |
---|
996 | io = (IO*)NEWSV(0,0); |
---|
997 | sv_upgrade((SV *)io,SVt_PVIO); |
---|
998 | SvREFCNT(io) = 1; |
---|
999 | SvOBJECT_on(io); |
---|
1000 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
---|
1001 | /* unless exists($main::{FileHandle}) and defined(%main::FileHandle::) */ |
---|
1002 | if (!(iogv && GvHV(iogv) && HvARRAY(GvHV(iogv)))) |
---|
1003 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
---|
1004 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
---|
1005 | return io; |
---|
1006 | } |
---|
1007 | |
---|
1008 | void |
---|
1009 | Perl_gv_check(pTHX_ HV *stash) |
---|
1010 | { |
---|
1011 | register HE *entry; |
---|
1012 | register I32 i; |
---|
1013 | register GV *gv; |
---|
1014 | HV *hv; |
---|
1015 | |
---|
1016 | if (!HvARRAY(stash)) |
---|
1017 | return; |
---|
1018 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
---|
1019 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
---|
1020 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
---|
1021 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv)) |
---|
1022 | { |
---|
1023 | if (hv != PL_defstash && hv != stash) |
---|
1024 | gv_check(hv); /* nested package */ |
---|
1025 | } |
---|
1026 | else if (isALPHA(*HeKEY(entry))) { |
---|
1027 | char *file; |
---|
1028 | gv = (GV*)HeVAL(entry); |
---|
1029 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
---|
1030 | continue; |
---|
1031 | file = GvFILE(gv); |
---|
1032 | /* performance hack: if filename is absolute and it's a standard |
---|
1033 | * module, don't bother warning */ |
---|
1034 | if (file |
---|
1035 | && PERL_FILE_IS_ABSOLUTE(file) |
---|
1036 | && (instr(file, "/lib/") || instr(file, ".pm"))) |
---|
1037 | { |
---|
1038 | continue; |
---|
1039 | } |
---|
1040 | CopLINE_set(PL_curcop, GvLINE(gv)); |
---|
1041 | #ifdef USE_ITHREADS |
---|
1042 | CopFILE(PL_curcop) = file; /* set for warning */ |
---|
1043 | #else |
---|
1044 | CopFILEGV(PL_curcop) = gv_fetchfile(file); |
---|
1045 | #endif |
---|
1046 | Perl_warner(aTHX_ WARN_ONCE, |
---|
1047 | "Name \"%s::%s\" used only once: possible typo", |
---|
1048 | HvNAME(stash), GvNAME(gv)); |
---|
1049 | } |
---|
1050 | } |
---|
1051 | } |
---|
1052 | } |
---|
1053 | |
---|
1054 | GV * |
---|
1055 | Perl_newGVgen(pTHX_ char *pack) |
---|
1056 | { |
---|
1057 | return gv_fetchpv(Perl_form(aTHX_ "%s::_GEN_%ld", pack, (long)PL_gensym++), |
---|
1058 | TRUE, SVt_PVGV); |
---|
1059 | } |
---|
1060 | |
---|
1061 | /* hopefully this is only called on local symbol table entries */ |
---|
1062 | |
---|
1063 | GP* |
---|
1064 | Perl_gp_ref(pTHX_ GP *gp) |
---|
1065 | { |
---|
1066 | if (!gp) |
---|
1067 | return (GP*)NULL; |
---|
1068 | gp->gp_refcnt++; |
---|
1069 | if (gp->gp_cv) { |
---|
1070 | if (gp->gp_cvgen) { |
---|
1071 | /* multi-named GPs cannot be used for method cache */ |
---|
1072 | SvREFCNT_dec(gp->gp_cv); |
---|
1073 | gp->gp_cv = Nullcv; |
---|
1074 | gp->gp_cvgen = 0; |
---|
1075 | } |
---|
1076 | else { |
---|
1077 | /* Adding a new name to a subroutine invalidates method cache */ |
---|
1078 | PL_sub_generation++; |
---|
1079 | } |
---|
1080 | } |
---|
1081 | return gp; |
---|
1082 | } |
---|
1083 | |
---|
1084 | void |
---|
1085 | Perl_gp_free(pTHX_ GV *gv) |
---|
1086 | { |
---|
1087 | GP* gp; |
---|
1088 | |
---|
1089 | if (!gv || !(gp = GvGP(gv))) |
---|
1090 | return; |
---|
1091 | if (gp->gp_refcnt == 0) { |
---|
1092 | if (ckWARN_d(WARN_INTERNAL)) |
---|
1093 | Perl_warner(aTHX_ WARN_INTERNAL, |
---|
1094 | "Attempt to free unreferenced glob pointers"); |
---|
1095 | return; |
---|
1096 | } |
---|
1097 | if (gp->gp_cv) { |
---|
1098 | /* Deleting the name of a subroutine invalidates method cache */ |
---|
1099 | PL_sub_generation++; |
---|
1100 | } |
---|
1101 | if (--gp->gp_refcnt > 0) { |
---|
1102 | if (gp->gp_egv == gv) |
---|
1103 | gp->gp_egv = 0; |
---|
1104 | return; |
---|
1105 | } |
---|
1106 | |
---|
1107 | SvREFCNT_dec(gp->gp_sv); |
---|
1108 | SvREFCNT_dec(gp->gp_av); |
---|
1109 | SvREFCNT_dec(gp->gp_hv); |
---|
1110 | SvREFCNT_dec(gp->gp_io); |
---|
1111 | SvREFCNT_dec(gp->gp_cv); |
---|
1112 | SvREFCNT_dec(gp->gp_form); |
---|
1113 | |
---|
1114 | Safefree(gp); |
---|
1115 | GvGP(gv) = 0; |
---|
1116 | } |
---|
1117 | |
---|
1118 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) |
---|
1119 | #define MICROPORT |
---|
1120 | #endif |
---|
1121 | |
---|
1122 | #ifdef MICROPORT /* Microport 2.4 hack */ |
---|
1123 | AV *GvAVn(gv) |
---|
1124 | register GV *gv; |
---|
1125 | { |
---|
1126 | if (GvGP(gv)->gp_av) |
---|
1127 | return GvGP(gv)->gp_av; |
---|
1128 | else |
---|
1129 | return GvGP(gv_AVadd(gv))->gp_av; |
---|
1130 | } |
---|
1131 | |
---|
1132 | HV *GvHVn(gv) |
---|
1133 | register GV *gv; |
---|
1134 | { |
---|
1135 | if (GvGP(gv)->gp_hv) |
---|
1136 | return GvGP(gv)->gp_hv; |
---|
1137 | else |
---|
1138 | return GvGP(gv_HVadd(gv))->gp_hv; |
---|
1139 | } |
---|
1140 | #endif /* Microport 2.4 hack */ |
---|
1141 | |
---|
1142 | /* Updates and caches the CV's */ |
---|
1143 | |
---|
1144 | bool |
---|
1145 | Perl_Gv_AMupdate(pTHX_ HV *stash) |
---|
1146 | { |
---|
1147 | GV* gv; |
---|
1148 | CV* cv; |
---|
1149 | MAGIC* mg=mg_find((SV*)stash,'c'); |
---|
1150 | AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
---|
1151 | AMT amt; |
---|
1152 | STRLEN n_a; |
---|
1153 | #ifdef OVERLOAD_VIA_HASH |
---|
1154 | GV** gvp; |
---|
1155 | HV* hv; |
---|
1156 | #endif |
---|
1157 | |
---|
1158 | if (mg && amtp->was_ok_am == PL_amagic_generation |
---|
1159 | && amtp->was_ok_sub == PL_sub_generation) |
---|
1160 | return AMT_AMAGIC(amtp); |
---|
1161 | if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */ |
---|
1162 | int i; |
---|
1163 | for (i=1; i<NofAMmeth; i++) { |
---|
1164 | if (amtp->table[i]) { |
---|
1165 | SvREFCNT_dec(amtp->table[i]); |
---|
1166 | } |
---|
1167 | } |
---|
1168 | } |
---|
1169 | sv_unmagic((SV*)stash, 'c'); |
---|
1170 | |
---|
1171 | DEBUG_o( Perl_deb(aTHX_ "Recalcing overload magic in package %s\n",HvNAME(stash)) ); |
---|
1172 | |
---|
1173 | amt.was_ok_am = PL_amagic_generation; |
---|
1174 | amt.was_ok_sub = PL_sub_generation; |
---|
1175 | amt.fallback = AMGfallNO; |
---|
1176 | amt.flags = 0; |
---|
1177 | |
---|
1178 | #ifdef OVERLOAD_VIA_HASH |
---|
1179 | gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */ |
---|
1180 | if (gvp && ((gv = *gvp) != (GV*)&PL_sv_undef && (hv = GvHV(gv)))) { |
---|
1181 | int filled=0; |
---|
1182 | int i; |
---|
1183 | char *cp; |
---|
1184 | SV* sv; |
---|
1185 | SV** svp; |
---|
1186 | |
---|
1187 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
---|
1188 | |
---|
1189 | if (( cp = (char *)PL_AMG_names[0] ) && |
---|
1190 | (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) { |
---|
1191 | if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
---|
1192 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
---|
1193 | } |
---|
1194 | for (i = 1; i < NofAMmeth; i++) { |
---|
1195 | cv = 0; |
---|
1196 | cp = (char *)PL_AMG_names[i]; |
---|
1197 | |
---|
1198 | svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE); |
---|
1199 | if (svp && ((sv = *svp) != &PL_sv_undef)) { |
---|
1200 | switch (SvTYPE(sv)) { |
---|
1201 | default: |
---|
1202 | if (!SvROK(sv)) { |
---|
1203 | if (!SvOK(sv)) break; |
---|
1204 | gv = gv_fetchmethod(stash, SvPV(sv, n_a)); |
---|
1205 | if (gv) cv = GvCV(gv); |
---|
1206 | break; |
---|
1207 | } |
---|
1208 | cv = (CV*)SvRV(sv); |
---|
1209 | if (SvTYPE(cv) == SVt_PVCV) |
---|
1210 | break; |
---|
1211 | /* FALL THROUGH */ |
---|
1212 | case SVt_PVHV: |
---|
1213 | case SVt_PVAV: |
---|
1214 | Perl_croak(aTHX_ "Not a subroutine reference in overload table"); |
---|
1215 | return FALSE; |
---|
1216 | case SVt_PVCV: |
---|
1217 | cv = (CV*)sv; |
---|
1218 | break; |
---|
1219 | case SVt_PVGV: |
---|
1220 | if (!(cv = GvCVu((GV*)sv))) |
---|
1221 | cv = sv_2cv(sv, &stash, &gv, FALSE); |
---|
1222 | break; |
---|
1223 | } |
---|
1224 | if (cv) filled=1; |
---|
1225 | else { |
---|
1226 | Perl_croak(aTHX_ "Method for operation %s not found in package %.256s during blessing\n", |
---|
1227 | cp,HvNAME(stash)); |
---|
1228 | return FALSE; |
---|
1229 | } |
---|
1230 | } |
---|
1231 | #else |
---|
1232 | { |
---|
1233 | int filled = 0; |
---|
1234 | int i; |
---|
1235 | const char *cp; |
---|
1236 | SV* sv = NULL; |
---|
1237 | |
---|
1238 | /* Work with "fallback" key, which we assume to be first in PL_AMG_names */ |
---|
1239 | |
---|
1240 | if ((cp = PL_AMG_names[0])) { |
---|
1241 | /* Try to find via inheritance. */ |
---|
1242 | gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */ |
---|
1243 | if (gv) |
---|
1244 | sv = GvSV(gv); |
---|
1245 | |
---|
1246 | if (!gv) |
---|
1247 | goto no_table; |
---|
1248 | else if (SvTRUE(sv)) |
---|
1249 | amt.fallback=AMGfallYES; |
---|
1250 | else if (SvOK(sv)) |
---|
1251 | amt.fallback=AMGfallNEVER; |
---|
1252 | } |
---|
1253 | |
---|
1254 | for (i = 1; i < NofAMmeth; i++) { |
---|
1255 | SV *cookie = sv_2mortal(Perl_newSVpvf(aTHX_ "(%s", cp = PL_AMG_names[i])); |
---|
1256 | DEBUG_o( Perl_deb(aTHX_ "Checking overloading of `%s' in package `%.256s'\n", |
---|
1257 | cp, HvNAME(stash)) ); |
---|
1258 | /* don't fill the cache while looking up! */ |
---|
1259 | gv = gv_fetchmeth(stash, SvPVX(cookie), SvCUR(cookie), -1); |
---|
1260 | cv = 0; |
---|
1261 | if(gv && (cv = GvCV(gv))) { |
---|
1262 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
---|
1263 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { |
---|
1264 | /* GvSV contains the name of the method. */ |
---|
1265 | GV *ngv; |
---|
1266 | |
---|
1267 | DEBUG_o( Perl_deb(aTHX_ "Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", |
---|
1268 | SvPV(GvSV(gv), n_a), cp, HvNAME(stash)) ); |
---|
1269 | if (!SvPOK(GvSV(gv)) |
---|
1270 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), |
---|
1271 | FALSE))) |
---|
1272 | { |
---|
1273 | /* Can be an import stub (created by `can'). */ |
---|
1274 | if (GvCVGEN(gv)) { |
---|
1275 | Perl_croak(aTHX_ "Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", |
---|
1276 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
---|
1277 | cp, HvNAME(stash)); |
---|
1278 | } else |
---|
1279 | Perl_croak(aTHX_ "Can't resolve method `%.256s' overloading `%s' in package `%.256s'", |
---|
1280 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
---|
1281 | cp, HvNAME(stash)); |
---|
1282 | } |
---|
1283 | cv = GvCV(gv = ngv); |
---|
1284 | } |
---|
1285 | DEBUG_o( Perl_deb(aTHX_ "Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", |
---|
1286 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), |
---|
1287 | GvNAME(CvGV(cv))) ); |
---|
1288 | filled = 1; |
---|
1289 | } |
---|
1290 | #endif |
---|
1291 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
---|
1292 | } |
---|
1293 | if (filled) { |
---|
1294 | AMT_AMAGIC_on(&amt); |
---|
1295 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT)); |
---|
1296 | return TRUE; |
---|
1297 | } |
---|
1298 | } |
---|
1299 | /* Here we have no table: */ |
---|
1300 | no_table: |
---|
1301 | AMT_AMAGIC_off(&amt); |
---|
1302 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS)); |
---|
1303 | return FALSE; |
---|
1304 | } |
---|
1305 | |
---|
1306 | SV* |
---|
1307 | Perl_amagic_call(pTHX_ SV *left, SV *right, int method, int flags) |
---|
1308 | { |
---|
1309 | MAGIC *mg; |
---|
1310 | CV *cv; |
---|
1311 | CV **cvp=NULL, **ocvp=NULL; |
---|
1312 | AMT *amtp, *oamtp; |
---|
1313 | int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; |
---|
1314 | int postpr = 0, force_cpy = 0, assignshift = assign ? 1 : 0; |
---|
1315 | HV* stash; |
---|
1316 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
---|
1317 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c')) |
---|
1318 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
---|
1319 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
---|
1320 | : (CV **) NULL)) |
---|
1321 | && ((cv = cvp[off=method+assignshift]) |
---|
1322 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
---|
1323 | * usual method */ |
---|
1324 | (fl = 1, cv = cvp[off=method])))) { |
---|
1325 | lr = -1; /* Call method for left argument */ |
---|
1326 | } else { |
---|
1327 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
---|
1328 | int logic; |
---|
1329 | |
---|
1330 | /* look for substituted methods */ |
---|
1331 | /* In all the covered cases we should be called with assign==0. */ |
---|
1332 | switch (method) { |
---|
1333 | case inc_amg: |
---|
1334 | force_cpy = 1; |
---|
1335 | if ((cv = cvp[off=add_ass_amg]) |
---|
1336 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { |
---|
1337 | right = &PL_sv_yes; lr = -1; assign = 1; |
---|
1338 | } |
---|
1339 | break; |
---|
1340 | case dec_amg: |
---|
1341 | force_cpy = 1; |
---|
1342 | if ((cv = cvp[off = subtr_ass_amg]) |
---|
1343 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { |
---|
1344 | right = &PL_sv_yes; lr = -1; assign = 1; |
---|
1345 | } |
---|
1346 | break; |
---|
1347 | case bool__amg: |
---|
1348 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
---|
1349 | break; |
---|
1350 | case numer_amg: |
---|
1351 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
---|
1352 | break; |
---|
1353 | case string_amg: |
---|
1354 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
---|
1355 | break; |
---|
1356 | case not_amg: |
---|
1357 | (void)((cv = cvp[off=bool__amg]) |
---|
1358 | || (cv = cvp[off=numer_amg]) |
---|
1359 | || (cv = cvp[off=string_amg])); |
---|
1360 | postpr = 1; |
---|
1361 | break; |
---|
1362 | case copy_amg: |
---|
1363 | { |
---|
1364 | /* |
---|
1365 | * SV* ref causes confusion with the interpreter variable of |
---|
1366 | * the same name |
---|
1367 | */ |
---|
1368 | SV* tmpRef=SvRV(left); |
---|
1369 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
---|
1370 | /* |
---|
1371 | * Just to be extra cautious. Maybe in some |
---|
1372 | * additional cases sv_setsv is safe, too. |
---|
1373 | */ |
---|
1374 | SV* newref = newSVsv(tmpRef); |
---|
1375 | SvOBJECT_on(newref); |
---|
1376 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef)); |
---|
1377 | return newref; |
---|
1378 | } |
---|
1379 | } |
---|
1380 | break; |
---|
1381 | case abs_amg: |
---|
1382 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
---|
1383 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
---|
1384 | SV* nullsv=sv_2mortal(newSViv(0)); |
---|
1385 | if (off1==lt_amg) { |
---|
1386 | SV* lessp = amagic_call(left,nullsv, |
---|
1387 | lt_amg,AMGf_noright); |
---|
1388 | logic = SvTRUE(lessp); |
---|
1389 | } else { |
---|
1390 | SV* lessp = amagic_call(left,nullsv, |
---|
1391 | ncmp_amg,AMGf_noright); |
---|
1392 | logic = (SvNV(lessp) < 0); |
---|
1393 | } |
---|
1394 | if (logic) { |
---|
1395 | if (off==subtr_amg) { |
---|
1396 | right = left; |
---|
1397 | left = nullsv; |
---|
1398 | lr = 1; |
---|
1399 | } |
---|
1400 | } else { |
---|
1401 | return left; |
---|
1402 | } |
---|
1403 | } |
---|
1404 | break; |
---|
1405 | case neg_amg: |
---|
1406 | if ((cv = cvp[off=subtr_amg])) { |
---|
1407 | right = left; |
---|
1408 | left = sv_2mortal(newSViv(0)); |
---|
1409 | lr = 1; |
---|
1410 | } |
---|
1411 | break; |
---|
1412 | case iter_amg: /* XXXX Eventually should do to_gv. */ |
---|
1413 | /* FAIL safe */ |
---|
1414 | return NULL; /* Delegate operation to standard mechanisms. */ |
---|
1415 | break; |
---|
1416 | case to_sv_amg: |
---|
1417 | case to_av_amg: |
---|
1418 | case to_hv_amg: |
---|
1419 | case to_gv_amg: |
---|
1420 | case to_cv_amg: |
---|
1421 | /* FAIL safe */ |
---|
1422 | return left; /* Delegate operation to standard mechanisms. */ |
---|
1423 | break; |
---|
1424 | default: |
---|
1425 | goto not_found; |
---|
1426 | } |
---|
1427 | if (!cv) goto not_found; |
---|
1428 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
---|
1429 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c')) |
---|
1430 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
---|
1431 | ? (amtp = (AMT*)mg->mg_ptr)->table |
---|
1432 | : (CV **) NULL)) |
---|
1433 | && (cv = cvp[off=method])) { /* Method for right |
---|
1434 | * argument found */ |
---|
1435 | lr=1; |
---|
1436 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
---|
1437 | && (cvp=ocvp) && (lr = -1)) |
---|
1438 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
---|
1439 | && !(flags & AMGf_unary)) { |
---|
1440 | /* We look for substitution for |
---|
1441 | * comparison operations and |
---|
1442 | * concatenation */ |
---|
1443 | if (method==concat_amg || method==concat_ass_amg |
---|
1444 | || method==repeat_amg || method==repeat_ass_amg) { |
---|
1445 | return NULL; /* Delegate operation to string conversion */ |
---|
1446 | } |
---|
1447 | off = -1; |
---|
1448 | switch (method) { |
---|
1449 | case lt_amg: |
---|
1450 | case le_amg: |
---|
1451 | case gt_amg: |
---|
1452 | case ge_amg: |
---|
1453 | case eq_amg: |
---|
1454 | case ne_amg: |
---|
1455 | postpr = 1; off=ncmp_amg; break; |
---|
1456 | case slt_amg: |
---|
1457 | case sle_amg: |
---|
1458 | case sgt_amg: |
---|
1459 | case sge_amg: |
---|
1460 | case seq_amg: |
---|
1461 | case sne_amg: |
---|
1462 | postpr = 1; off=scmp_amg; break; |
---|
1463 | } |
---|
1464 | if (off != -1) cv = cvp[off]; |
---|
1465 | if (!cv) { |
---|
1466 | goto not_found; |
---|
1467 | } |
---|
1468 | } else { |
---|
1469 | not_found: /* No method found, either report or croak */ |
---|
1470 | switch (method) { |
---|
1471 | case to_sv_amg: |
---|
1472 | case to_av_amg: |
---|
1473 | case to_hv_amg: |
---|
1474 | case to_gv_amg: |
---|
1475 | case to_cv_amg: |
---|
1476 | /* FAIL safe */ |
---|
1477 | return left; /* Delegate operation to standard mechanisms. */ |
---|
1478 | break; |
---|
1479 | } |
---|
1480 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
---|
1481 | notfound = 1; lr = -1; |
---|
1482 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
---|
1483 | notfound = 1; lr = 1; |
---|
1484 | } else { |
---|
1485 | SV *msg; |
---|
1486 | if (off==-1) off=method; |
---|
1487 | msg = sv_2mortal(Perl_newSVpvf(aTHX_ |
---|
1488 | "Operation `%s': no method found,%sargument %s%s%s%s", |
---|
1489 | PL_AMG_names[method + assignshift], |
---|
1490 | (flags & AMGf_unary ? " " : "\n\tleft "), |
---|
1491 | SvAMAGIC(left)? |
---|
1492 | "in overloaded package ": |
---|
1493 | "has no overloaded magic", |
---|
1494 | SvAMAGIC(left)? |
---|
1495 | HvNAME(SvSTASH(SvRV(left))): |
---|
1496 | "", |
---|
1497 | SvAMAGIC(right)? |
---|
1498 | ",\n\tright argument in overloaded package ": |
---|
1499 | (flags & AMGf_unary |
---|
1500 | ? "" |
---|
1501 | : ",\n\tright argument has no overloaded magic"), |
---|
1502 | SvAMAGIC(right)? |
---|
1503 | HvNAME(SvSTASH(SvRV(right))): |
---|
1504 | "")); |
---|
1505 | if (amtp && amtp->fallback >= AMGfallYES) { |
---|
1506 | DEBUG_o( Perl_deb(aTHX_ "%s", SvPVX(msg)) ); |
---|
1507 | } else { |
---|
1508 | Perl_croak(aTHX_ "%"SVf, msg); |
---|
1509 | } |
---|
1510 | return NULL; |
---|
1511 | } |
---|
1512 | force_cpy = force_cpy || assign; |
---|
1513 | } |
---|
1514 | } |
---|
1515 | if (!notfound) { |
---|
1516 | DEBUG_o( Perl_deb(aTHX_ |
---|
1517 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
---|
1518 | PL_AMG_names[off], |
---|
1519 | method+assignshift==off? "" : |
---|
1520 | " (initially `", |
---|
1521 | method+assignshift==off? "" : |
---|
1522 | PL_AMG_names[method+assignshift], |
---|
1523 | method+assignshift==off? "" : "')", |
---|
1524 | flags & AMGf_unary? "" : |
---|
1525 | lr==1 ? " for right argument": " for left argument", |
---|
1526 | flags & AMGf_unary? " for argument" : "", |
---|
1527 | HvNAME(stash), |
---|
1528 | fl? ",\n\tassignment variant used": "") ); |
---|
1529 | } |
---|
1530 | /* Since we use shallow copy during assignment, we need |
---|
1531 | * to dublicate the contents, probably calling user-supplied |
---|
1532 | * version of copy operator |
---|
1533 | */ |
---|
1534 | /* We need to copy in following cases: |
---|
1535 | * a) Assignment form was called. |
---|
1536 | * assignshift==1, assign==T, method + 1 == off |
---|
1537 | * b) Increment or decrement, called directly. |
---|
1538 | * assignshift==0, assign==0, method + 0 == off |
---|
1539 | * c) Increment or decrement, translated to assignment add/subtr. |
---|
1540 | * assignshift==0, assign==T, |
---|
1541 | * force_cpy == T |
---|
1542 | * d) Increment or decrement, translated to nomethod. |
---|
1543 | * assignshift==0, assign==0, |
---|
1544 | * force_cpy == T |
---|
1545 | * e) Assignment form translated to nomethod. |
---|
1546 | * assignshift==1, assign==T, method + 1 != off |
---|
1547 | * force_cpy == T |
---|
1548 | */ |
---|
1549 | /* off is method, method+assignshift, or a result of opcode substitution. |
---|
1550 | * In the latter case assignshift==0, so only notfound case is important. |
---|
1551 | */ |
---|
1552 | if (( (method + assignshift == off) |
---|
1553 | && (assign || (method == inc_amg) || (method == dec_amg))) |
---|
1554 | || force_cpy) |
---|
1555 | RvDEEPCP(left); |
---|
1556 | { |
---|
1557 | dSP; |
---|
1558 | BINOP myop; |
---|
1559 | SV* res; |
---|
1560 | bool oldcatch = CATCH_GET; |
---|
1561 | |
---|
1562 | CATCH_SET(TRUE); |
---|
1563 | Zero(&myop, 1, BINOP); |
---|
1564 | myop.op_last = (OP *) &myop; |
---|
1565 | myop.op_next = Nullop; |
---|
1566 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
---|
1567 | |
---|
1568 | PUSHSTACKi(PERLSI_OVERLOAD); |
---|
1569 | ENTER; |
---|
1570 | SAVEOP(); |
---|
1571 | PL_op = (OP *) &myop; |
---|
1572 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
---|
1573 | PL_op->op_private |= OPpENTERSUB_DB; |
---|
1574 | PUTBACK; |
---|
1575 | pp_pushmark(); |
---|
1576 | |
---|
1577 | EXTEND(SP, notfound + 5); |
---|
1578 | PUSHs(lr>0? right: left); |
---|
1579 | PUSHs(lr>0? left: right); |
---|
1580 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
---|
1581 | if (notfound) { |
---|
1582 | PUSHs( sv_2mortal(newSVpv((char *)PL_AMG_names[method + assignshift],0))); |
---|
1583 | } |
---|
1584 | PUSHs((SV*)cv); |
---|
1585 | PUTBACK; |
---|
1586 | |
---|
1587 | if ((PL_op = Perl_pp_entersub(aTHX))) |
---|
1588 | CALLRUNOPS(aTHX); |
---|
1589 | LEAVE; |
---|
1590 | SPAGAIN; |
---|
1591 | |
---|
1592 | res=POPs; |
---|
1593 | PUTBACK; |
---|
1594 | POPSTACK; |
---|
1595 | CATCH_SET(oldcatch); |
---|
1596 | |
---|
1597 | if (postpr) { |
---|
1598 | int ans; |
---|
1599 | switch (method) { |
---|
1600 | case le_amg: |
---|
1601 | case sle_amg: |
---|
1602 | ans=SvIV(res)<=0; break; |
---|
1603 | case lt_amg: |
---|
1604 | case slt_amg: |
---|
1605 | ans=SvIV(res)<0; break; |
---|
1606 | case ge_amg: |
---|
1607 | case sge_amg: |
---|
1608 | ans=SvIV(res)>=0; break; |
---|
1609 | case gt_amg: |
---|
1610 | case sgt_amg: |
---|
1611 | ans=SvIV(res)>0; break; |
---|
1612 | case eq_amg: |
---|
1613 | case seq_amg: |
---|
1614 | ans=SvIV(res)==0; break; |
---|
1615 | case ne_amg: |
---|
1616 | case sne_amg: |
---|
1617 | ans=SvIV(res)!=0; break; |
---|
1618 | case inc_amg: |
---|
1619 | case dec_amg: |
---|
1620 | SvSetSV(left,res); return left; |
---|
1621 | case not_amg: |
---|
1622 | ans=!SvTRUE(res); break; |
---|
1623 | } |
---|
1624 | return boolSV(ans); |
---|
1625 | } else if (method==copy_amg) { |
---|
1626 | if (!SvROK(res)) { |
---|
1627 | Perl_croak(aTHX_ "Copy method did not return a reference"); |
---|
1628 | } |
---|
1629 | return SvREFCNT_inc(SvRV(res)); |
---|
1630 | } else { |
---|
1631 | return res; |
---|
1632 | } |
---|
1633 | } |
---|
1634 | } |
---|
1635 | |
---|
1636 | /* |
---|
1637 | =for apidoc is_gv_magical |
---|
1638 | |
---|
1639 | Returns C<TRUE> if given the name of a magical GV. |
---|
1640 | |
---|
1641 | Currently only useful internally when determining if a GV should be |
---|
1642 | created even in rvalue contexts. |
---|
1643 | |
---|
1644 | C<flags> is not used at present but available for future extension to |
---|
1645 | allow selecting particular classes of magical variable. |
---|
1646 | |
---|
1647 | =cut |
---|
1648 | */ |
---|
1649 | bool |
---|
1650 | Perl_is_gv_magical(pTHX_ char *name, STRLEN len, U32 flags) |
---|
1651 | { |
---|
1652 | if (!len) |
---|
1653 | return FALSE; |
---|
1654 | |
---|
1655 | switch (*name) { |
---|
1656 | case 'I': |
---|
1657 | if (len == 3 && strEQ(name, "ISA")) |
---|
1658 | goto yes; |
---|
1659 | break; |
---|
1660 | case 'O': |
---|
1661 | if (len == 8 && strEQ(name, "OVERLOAD")) |
---|
1662 | goto yes; |
---|
1663 | break; |
---|
1664 | case 'S': |
---|
1665 | if (len == 3 && strEQ(name, "SIG")) |
---|
1666 | goto yes; |
---|
1667 | break; |
---|
1668 | case '\027': /* $^W & $^WARNING_BITS */ |
---|
1669 | if (len == 1 |
---|
1670 | || (len == 12 && strEQ(name, "\027ARNING_BITS")) |
---|
1671 | || (len == 17 && strEQ(name, "\027IDE_SYSTEM_CALLS"))) |
---|
1672 | { |
---|
1673 | goto yes; |
---|
1674 | } |
---|
1675 | break; |
---|
1676 | |
---|
1677 | case '&': |
---|
1678 | case '`': |
---|
1679 | case '\'': |
---|
1680 | case ':': |
---|
1681 | case '?': |
---|
1682 | case '!': |
---|
1683 | case '-': |
---|
1684 | case '#': |
---|
1685 | case '*': |
---|
1686 | case '[': |
---|
1687 | case '^': |
---|
1688 | case '~': |
---|
1689 | case '=': |
---|
1690 | case '%': |
---|
1691 | case '.': |
---|
1692 | case '(': |
---|
1693 | case ')': |
---|
1694 | case '<': |
---|
1695 | case '>': |
---|
1696 | case ',': |
---|
1697 | case '\\': |
---|
1698 | case '/': |
---|
1699 | case '|': |
---|
1700 | case '+': |
---|
1701 | case ';': |
---|
1702 | case ']': |
---|
1703 | case '\001': /* $^A */ |
---|
1704 | case '\003': /* $^C */ |
---|
1705 | case '\004': /* $^D */ |
---|
1706 | case '\005': /* $^E */ |
---|
1707 | case '\006': /* $^F */ |
---|
1708 | case '\010': /* $^H */ |
---|
1709 | case '\011': /* $^I, NOT \t in EBCDIC */ |
---|
1710 | case '\014': /* $^L */ |
---|
1711 | case '\017': /* $^O */ |
---|
1712 | case '\020': /* $^P */ |
---|
1713 | case '\023': /* $^S */ |
---|
1714 | case '\024': /* $^T */ |
---|
1715 | case '\026': /* $^V */ |
---|
1716 | if (len == 1) |
---|
1717 | goto yes; |
---|
1718 | break; |
---|
1719 | case '1': |
---|
1720 | case '2': |
---|
1721 | case '3': |
---|
1722 | case '4': |
---|
1723 | case '5': |
---|
1724 | case '6': |
---|
1725 | case '7': |
---|
1726 | case '8': |
---|
1727 | case '9': |
---|
1728 | if (len > 1) { |
---|
1729 | char *end = name + len; |
---|
1730 | while (--end > name) { |
---|
1731 | if (!isDIGIT(*end)) |
---|
1732 | return FALSE; |
---|
1733 | } |
---|
1734 | } |
---|
1735 | yes: |
---|
1736 | return TRUE; |
---|
1737 | default: |
---|
1738 | break; |
---|
1739 | } |
---|
1740 | return FALSE; |
---|
1741 | } |
---|