Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | /* gv.c |
79072805 | 2 | * |
9607fc9c | 3 | * Copyright (c) 1991-1997, Larry Wall |
79072805 LW |
4 | * |
5 | * You may distribute under the terms of either the GNU General Public | |
6 | * License or the Artistic License, as specified in the README file. | |
7 | * | |
a0d0e21e LW |
8 | */ |
9 | ||
10 | /* | |
11 | * 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure | |
12 | * of your inquisitiveness, I shall spend all the rest of my days answering | |
13 | * you. What more do you want to know?' | |
14 | * 'The names of all the stars, and of all living things, and the whole | |
15 | * history of Middle-earth and Over-heaven and of the Sundering Seas,' | |
16 | * laughed Pippin. | |
79072805 LW |
17 | */ |
18 | ||
19 | #include "EXTERN.h" | |
20 | #include "perl.h" | |
21 | ||
71be2cbc | 22 | EXT char rcsid[]; |
93a17b20 | 23 | |
79072805 LW |
24 | GV * |
25 | gv_AVadd(gv) | |
26 | register GV *gv; | |
27 | { | |
a0d0e21e LW |
28 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
29 | croak("Bad symbol for array"); | |
79072805 LW |
30 | if (!GvAV(gv)) |
31 | GvAV(gv) = newAV(); | |
32 | return gv; | |
33 | } | |
34 | ||
35 | GV * | |
36 | gv_HVadd(gv) | |
37 | register GV *gv; | |
38 | { | |
a0d0e21e LW |
39 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
40 | croak("Bad symbol for hash"); | |
79072805 | 41 | if (!GvHV(gv)) |
463ee0b2 | 42 | GvHV(gv) = newHV(); |
79072805 LW |
43 | return gv; |
44 | } | |
45 | ||
46 | GV * | |
a0d0e21e LW |
47 | gv_IOadd(gv) |
48 | register GV *gv; | |
49 | { | |
50 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) | |
51 | croak("Bad symbol for filehandle"); | |
52 | if (!GvIOp(gv)) | |
53 | GvIOp(gv) = newIO(); | |
54 | return gv; | |
55 | } | |
56 | ||
57 | GV * | |
79072805 LW |
58 | gv_fetchfile(name) |
59 | char *name; | |
60 | { | |
e858de61 | 61 | dTHR; |
53d95988 CS |
62 | char smallbuf[256]; |
63 | char *tmpbuf; | |
8ebc5c01 | 64 | STRLEN tmplen; |
79072805 LW |
65 | GV *gv; |
66 | ||
53d95988 CS |
67 | tmplen = strlen(name) + 2; |
68 | if (tmplen < sizeof smallbuf) | |
69 | tmpbuf = smallbuf; | |
70 | else | |
71 | New(603, tmpbuf, tmplen + 1, char); | |
72 | tmpbuf[0] = '_'; | |
73 | tmpbuf[1] = '<'; | |
74 | strcpy(tmpbuf + 2, name); | |
8ebc5c01 | 75 | gv = *(GV**)hv_fetch(defstash, tmpbuf, tmplen, TRUE); |
76 | if (!isGV(gv)) | |
77 | gv_init(gv, defstash, tmpbuf, tmplen, FALSE); | |
53d95988 CS |
78 | if (tmpbuf != smallbuf) |
79 | Safefree(tmpbuf); | |
79072805 | 80 | sv_setpv(GvSV(gv), name); |
8ebc5c01 | 81 | if (*name == '/' && (instr(name, "/lib/") || instr(name, ".pm"))) |
a5f75d66 | 82 | GvMULTI_on(gv); |
84902520 | 83 | if (PERLDB_LINE) |
93a17b20 | 84 | hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L'); |
79072805 LW |
85 | return gv; |
86 | } | |
87 | ||
463ee0b2 LW |
88 | void |
89 | gv_init(gv, stash, name, len, multi) | |
90 | GV *gv; | |
91 | HV *stash; | |
92 | char *name; | |
93 | STRLEN len; | |
94 | int multi; | |
95 | { | |
0f15f207 | 96 | dTHR; |
463ee0b2 LW |
97 | register GP *gp; |
98 | ||
dc437b57 | 99 | sv_upgrade((SV*)gv, SVt_PVGV); |
463ee0b2 LW |
100 | if (SvLEN(gv)) |
101 | Safefree(SvPVX(gv)); | |
44a8e56a | 102 | Newz(602, gp, 1, GP); |
8990e307 | 103 | GvGP(gv) = gp_ref(gp); |
463ee0b2 LW |
104 | GvSV(gv) = NEWSV(72,0); |
105 | GvLINE(gv) = curcop->cop_line; | |
8990e307 | 106 | GvFILEGV(gv) = curcop->cop_filegv; |
463ee0b2 LW |
107 | GvEGV(gv) = gv; |
108 | sv_magic((SV*)gv, (SV*)gv, '*', name, len); | |
109 | GvSTASH(gv) = stash; | |
a0d0e21e | 110 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 LW |
111 | GvNAMELEN(gv) = len; |
112 | if (multi) | |
a5f75d66 | 113 | GvMULTI_on(gv); |
463ee0b2 LW |
114 | } |
115 | ||
a0d0e21e LW |
116 | static void |
117 | gv_init_sv(gv, sv_type) | |
118 | GV* gv; | |
119 | I32 sv_type; | |
120 | { | |
121 | switch (sv_type) { | |
122 | case SVt_PVIO: | |
123 | (void)GvIOn(gv); | |
124 | break; | |
125 | case SVt_PVAV: | |
126 | (void)GvAVn(gv); | |
127 | break; | |
128 | case SVt_PVHV: | |
129 | (void)GvHVn(gv); | |
130 | break; | |
131 | } | |
132 | } | |
133 | ||
79072805 | 134 | GV * |
a0d0e21e | 135 | gv_fetchmeth(stash, name, len, level) |
79072805 LW |
136 | HV* stash; |
137 | char* name; | |
463ee0b2 | 138 | STRLEN len; |
a0d0e21e | 139 | I32 level; |
79072805 LW |
140 | { |
141 | AV* av; | |
463ee0b2 | 142 | GV* topgv; |
79072805 | 143 | GV* gv; |
463ee0b2 | 144 | GV** gvp; |
748a9306 | 145 | CV* cv; |
a0d0e21e LW |
146 | |
147 | if (!stash) | |
148 | return 0; | |
44a8e56a | 149 | if ((level > 100) || (level < -100)) |
a0d0e21e | 150 | croak("Recursive inheritance detected"); |
463ee0b2 | 151 | |
463ee0b2 | 152 | DEBUG_o( deb("Looking for method %s in package %s\n",name,HvNAME(stash)) ); |
44a8e56a | 153 | |
154 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); | |
155 | if (!gvp) | |
156 | topgv = Nullgv; | |
157 | else { | |
158 | topgv = *gvp; | |
159 | if (SvTYPE(topgv) != SVt_PVGV) | |
160 | gv_init(topgv, stash, name, len, TRUE); | |
161 | if (cv = GvCV(topgv)) { | |
162 | /* If genuine method or valid cache entry, use it */ | |
163 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) >= sub_generation) | |
7a4c00b4 | 164 | return topgv; |
44a8e56a | 165 | /* Stale cached entry: junk it */ |
166 | SvREFCNT_dec(cv); | |
167 | GvCV(topgv) = cv = Nullcv; | |
168 | GvCVGEN(topgv) = 0; | |
748a9306 | 169 | } |
463ee0b2 | 170 | } |
79072805 | 171 | |
9607fc9c | 172 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
173 | av = (gvp && (gv = *gvp) && gv != (GV*)&sv_undef) ? GvAV(gv) : Nullav; | |
174 | ||
fb73857a | 175 | /* create and re-create @.*::SUPER::ISA on demand */ |
176 | if (!av || !SvMAGIC(av)) { | |
9607fc9c | 177 | char* packname = HvNAME(stash); |
178 | STRLEN packlen = strlen(packname); | |
179 | ||
180 | if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) { | |
181 | HV* basestash; | |
182 | ||
183 | packlen -= 7; | |
184 | basestash = gv_stashpvn(packname, packlen, TRUE); | |
185 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); | |
186 | if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) { | |
e858de61 | 187 | dTHR; /* just for SvREFCNT_dec */ |
9607fc9c | 188 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
189 | if (!gvp || !(gv = *gvp)) | |
190 | croak("Cannot create %s::ISA", HvNAME(stash)); | |
191 | if (SvTYPE(gv) != SVt_PVGV) | |
192 | gv_init(gv, stash, "ISA", 3, TRUE); | |
193 | SvREFCNT_dec(GvAV(gv)); | |
194 | GvAV(gv) = (AV*)SvREFCNT_inc(av); | |
195 | } | |
196 | } | |
197 | } | |
198 | ||
199 | if (av) { | |
79072805 LW |
200 | SV** svp = AvARRAY(av); |
201 | I32 items = AvFILL(av) + 1; | |
202 | while (items--) { | |
79072805 | 203 | SV* sv = *svp++; |
a0d0e21e | 204 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 | 205 | if (!basestash) { |
79072805 | 206 | if (dowarn) |
a0d0e21e | 207 | warn("Can't locate package %s for @%s::ISA", |
463ee0b2 | 208 | SvPVX(sv), HvNAME(stash)); |
79072805 LW |
209 | continue; |
210 | } | |
44a8e56a | 211 | gv = gv_fetchmeth(basestash, name, len, |
212 | (level >= 0) ? level + 1 : level - 1); | |
213 | if (gv) | |
214 | goto gotcha; | |
79072805 LW |
215 | } |
216 | } | |
a0d0e21e | 217 | |
9607fc9c | 218 | /* if at top level, try UNIVERSAL */ |
219 | ||
44a8e56a | 220 | if (level == 0 || level == -1) { |
9607fc9c | 221 | HV* lastchance; |
222 | ||
dc437b57 | 223 | if (lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE)) { |
44a8e56a | 224 | if (gv = gv_fetchmeth(lastchance, name, len, |
225 | (level >= 0) ? level + 1 : level - 1)) { | |
226 | gotcha: | |
dc848c6f | 227 | /* |
228 | * Cache method in topgv if: | |
229 | * 1. topgv has no synonyms (else inheritance crosses wires) | |
230 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) | |
231 | */ | |
232 | if (topgv && | |
233 | GvREFCNT(topgv) == 1 && | |
234 | (cv = GvCV(gv)) && | |
235 | (CvROOT(cv) || CvXSUB(cv))) | |
236 | { | |
e858de61 | 237 | dTHR; /* just for SvREFCNT_inc */ |
44a8e56a | 238 | if (cv = GvCV(topgv)) |
239 | SvREFCNT_dec(cv); | |
240 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); | |
241 | GvCVGEN(topgv) = sub_generation; | |
242 | } | |
a0d0e21e LW |
243 | return gv; |
244 | } | |
245 | } | |
246 | } | |
247 | ||
79072805 LW |
248 | return 0; |
249 | } | |
250 | ||
251 | GV * | |
463ee0b2 LW |
252 | gv_fetchmethod(stash, name) |
253 | HV* stash; | |
254 | char* name; | |
255 | { | |
dc848c6f | 256 | return gv_fetchmethod_autoload(stash, name, TRUE); |
257 | } | |
258 | ||
259 | GV * | |
260 | gv_fetchmethod_autoload(stash, name, autoload) | |
261 | HV* stash; | |
262 | char* name; | |
263 | I32 autoload; | |
264 | { | |
0f15f207 | 265 | dTHR; |
463ee0b2 | 266 | register char *nend; |
a0d0e21e LW |
267 | char *nsplit = 0; |
268 | GV* gv; | |
463ee0b2 LW |
269 | |
270 | for (nend = name; *nend; nend++) { | |
9607fc9c | 271 | if (*nend == '\'') |
a0d0e21e | 272 | nsplit = nend; |
9607fc9c | 273 | else if (*nend == ':' && *(nend + 1) == ':') |
274 | nsplit = ++nend; | |
a0d0e21e LW |
275 | } |
276 | if (nsplit) { | |
a0d0e21e LW |
277 | char *origname = name; |
278 | name = nsplit + 1; | |
a0d0e21e LW |
279 | if (*nsplit == ':') |
280 | --nsplit; | |
9607fc9c | 281 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
282 | /* ->SUPER::method should really be looked up in original stash */ | |
fc36a67e | 283 | SV *tmpstr = sv_2mortal(newSVpvf("%s::SUPER", |
284 | HvNAME(curcop->cop_stash))); | |
9607fc9c | 285 | stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); |
286 | DEBUG_o( deb("Treating %s as %s::%s\n", | |
287 | origname, HvNAME(stash), name) ); | |
4633a7c4 | 288 | } |
9607fc9c | 289 | else |
290 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); | |
4633a7c4 LW |
291 | } |
292 | ||
9607fc9c | 293 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e | 294 | if (!gv) { |
702887b4 | 295 | if (strEQ(name,"import")) |
dc437b57 | 296 | gv = (GV*)&sv_yes; |
dc848c6f | 297 | else if (autoload) |
54310121 | 298 | gv = gv_autoload4(stash, name, nend - name, TRUE); |
463ee0b2 | 299 | } |
dc848c6f | 300 | else if (autoload) { |
301 | CV* cv = GvCV(gv); | |
09280a33 CS |
302 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
303 | GV* stubgv; | |
304 | GV* autogv; | |
305 | ||
306 | if (CvANON(cv)) | |
307 | stubgv = gv; | |
308 | else { | |
309 | stubgv = CvGV(cv); | |
310 | if (GvCV(stubgv) != cv) /* orphaned import */ | |
311 | stubgv = gv; | |
312 | } | |
313 | autogv = gv_autoload4(GvSTASH(stubgv), | |
314 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); | |
dc848c6f | 315 | if (autogv) |
316 | gv = autogv; | |
317 | } | |
318 | } | |
44a8e56a | 319 | |
320 | return gv; | |
321 | } | |
322 | ||
323 | GV* | |
54310121 | 324 | gv_autoload4(stash, name, len, method) |
44a8e56a | 325 | HV* stash; |
326 | char* name; | |
327 | STRLEN len; | |
54310121 | 328 | I32 method; |
44a8e56a | 329 | { |
330 | static char autoload[] = "AUTOLOAD"; | |
331 | static STRLEN autolen = 8; | |
332 | GV* gv; | |
333 | CV* cv; | |
334 | HV* varstash; | |
335 | GV* vargv; | |
336 | SV* varsv; | |
337 | ||
338 | if (len == autolen && strnEQ(name, autoload, autolen)) | |
339 | return Nullgv; | |
dc848c6f | 340 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
341 | return Nullgv; | |
342 | cv = GvCV(gv); | |
343 | ||
344 | /* | |
345 | * Inheriting AUTOLOAD for non-methods works ... for now. | |
346 | */ | |
347 | if (dowarn && !method && (GvCVGEN(gv) || GvSTASH(gv) != stash)) | |
348 | warn( | |
349 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", | |
350 | HvNAME(stash), (int)len, name); | |
44a8e56a | 351 | |
352 | /* | |
353 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. | |
354 | * The subroutine's original name may not be "AUTOLOAD", so we don't | |
355 | * use that, but for lack of anything better we will use the sub's | |
356 | * original package to look up $AUTOLOAD. | |
357 | */ | |
358 | varstash = GvSTASH(CvGV(cv)); | |
359 | vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); | |
360 | if (!isGV(vargv)) | |
361 | gv_init(vargv, varstash, autoload, autolen, FALSE); | |
362 | varsv = GvSV(vargv); | |
363 | sv_setpv(varsv, HvNAME(stash)); | |
364 | sv_catpvn(varsv, "::", 2); | |
365 | sv_catpvn(varsv, name, len); | |
366 | SvTAINTED_off(varsv); | |
a0d0e21e LW |
367 | return gv; |
368 | } | |
369 | ||
370 | HV* | |
371 | gv_stashpv(name,create) | |
372 | char *name; | |
373 | I32 create; | |
374 | { | |
dc437b57 | 375 | return gv_stashpvn(name, strlen(name), create); |
376 | } | |
377 | ||
378 | HV* | |
379 | gv_stashpvn(name,namelen,create) | |
380 | char *name; | |
381 | U32 namelen; | |
382 | I32 create; | |
383 | { | |
46fc3d4c | 384 | char smallbuf[256]; |
385 | char *tmpbuf; | |
a0d0e21e LW |
386 | HV *stash; |
387 | GV *tmpgv; | |
dc437b57 | 388 | |
46fc3d4c | 389 | if (namelen + 3 < sizeof smallbuf) |
390 | tmpbuf = smallbuf; | |
391 | else | |
392 | New(606, tmpbuf, namelen + 3, char); | |
dc437b57 | 393 | Copy(name,tmpbuf,namelen,char); |
394 | tmpbuf[namelen++] = ':'; | |
395 | tmpbuf[namelen++] = ':'; | |
396 | tmpbuf[namelen] = '\0'; | |
46fc3d4c | 397 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
398 | if (tmpbuf != smallbuf) | |
399 | Safefree(tmpbuf); | |
a0d0e21e LW |
400 | if (!tmpgv) |
401 | return 0; | |
402 | if (!GvHV(tmpgv)) | |
403 | GvHV(tmpgv) = newHV(); | |
404 | stash = GvHV(tmpgv); | |
405 | if (!HvNAME(stash)) | |
406 | HvNAME(stash) = savepv(name); | |
407 | return stash; | |
463ee0b2 LW |
408 | } |
409 | ||
a0d0e21e LW |
410 | HV* |
411 | gv_stashsv(sv,create) | |
412 | SV *sv; | |
413 | I32 create; | |
414 | { | |
dc437b57 | 415 | register char *ptr; |
416 | STRLEN len; | |
417 | ptr = SvPV(sv,len); | |
418 | return gv_stashpvn(ptr, len, create); | |
a0d0e21e LW |
419 | } |
420 | ||
421 | ||
463ee0b2 | 422 | GV * |
a0d0e21e | 423 | gv_fetchpv(nambeg,add,sv_type) |
463ee0b2 | 424 | char *nambeg; |
79072805 | 425 | I32 add; |
a0d0e21e | 426 | I32 sv_type; |
79072805 | 427 | { |
11343788 | 428 | dTHR; |
463ee0b2 LW |
429 | register char *name = nambeg; |
430 | register GV *gv = 0; | |
79072805 | 431 | GV**gvp; |
79072805 LW |
432 | I32 len; |
433 | register char *namend; | |
463ee0b2 | 434 | HV *stash = 0; |
9607fc9c | 435 | U32 add_gvflags = 0; |
85e6fe83 | 436 | char *tmpbuf; |
79072805 | 437 | |
c07a80fd | 438 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
439 | name++; | |
440 | ||
79072805 | 441 | for (namend = name; *namend; namend++) { |
463ee0b2 LW |
442 | if ((*namend == '\'' && namend[1]) || |
443 | (*namend == ':' && namend[1] == ':')) | |
444 | { | |
463ee0b2 LW |
445 | if (!stash) |
446 | stash = defstash; | |
dc437b57 | 447 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e | 448 | return Nullgv; |
463ee0b2 | 449 | |
85e6fe83 LW |
450 | len = namend - name; |
451 | if (len > 0) { | |
a0d0e21e LW |
452 | New(601, tmpbuf, len+3, char); |
453 | Copy(name, tmpbuf, len, char); | |
454 | tmpbuf[len++] = ':'; | |
455 | tmpbuf[len++] = ':'; | |
456 | tmpbuf[len] = '\0'; | |
463ee0b2 | 457 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
85e6fe83 | 458 | Safefree(tmpbuf); |
463ee0b2 LW |
459 | if (!gvp || *gvp == (GV*)&sv_undef) |
460 | return Nullgv; | |
461 | gv = *gvp; | |
85e6fe83 | 462 | |
463ee0b2 | 463 | if (SvTYPE(gv) == SVt_PVGV) |
a5f75d66 | 464 | GvMULTI_on(gv); |
a0d0e21e LW |
465 | else if (!add) |
466 | return Nullgv; | |
463ee0b2 LW |
467 | else |
468 | gv_init(gv, stash, nambeg, namend - nambeg, (add & 2)); | |
85e6fe83 | 469 | |
463ee0b2 LW |
470 | if (!(stash = GvHV(gv))) |
471 | stash = GvHV(gv) = newHV(); | |
85e6fe83 | 472 | |
463ee0b2 | 473 | if (!HvNAME(stash)) |
a0d0e21e | 474 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 LW |
475 | } |
476 | ||
477 | if (*namend == ':') | |
478 | namend++; | |
479 | namend++; | |
480 | name = namend; | |
481 | if (!*name) | |
dc437b57 | 482 | return gv ? gv : (GV*)*hv_fetch(defstash, "main::", 6, TRUE); |
79072805 | 483 | } |
79072805 | 484 | } |
a0d0e21e LW |
485 | len = namend - name; |
486 | if (!len) | |
487 | len = 1; | |
463ee0b2 LW |
488 | |
489 | /* No stash in name, so see how we can default */ | |
490 | ||
491 | if (!stash) { | |
492 | if (isIDFIRST(*name)) { | |
9607fc9c | 493 | bool global = FALSE; |
494 | ||
463ee0b2 LW |
495 | if (isUPPER(*name)) { |
496 | if (*name > 'I') { | |
497 | if (*name == 'S' && ( | |
498 | strEQ(name, "SIG") || | |
499 | strEQ(name, "STDIN") || | |
500 | strEQ(name, "STDOUT") || | |
501 | strEQ(name, "STDERR") )) | |
502 | global = TRUE; | |
503 | } | |
504 | else if (*name > 'E') { | |
505 | if (*name == 'I' && strEQ(name, "INC")) | |
506 | global = TRUE; | |
507 | } | |
508 | else if (*name > 'A') { | |
509 | if (*name == 'E' && strEQ(name, "ENV")) | |
510 | global = TRUE; | |
511 | } | |
512 | else if (*name == 'A' && ( | |
513 | strEQ(name, "ARGV") || | |
514 | strEQ(name, "ARGVOUT") )) | |
515 | global = TRUE; | |
516 | } | |
517 | else if (*name == '_' && !name[1]) | |
518 | global = TRUE; | |
9607fc9c | 519 | |
463ee0b2 LW |
520 | if (global) |
521 | stash = defstash; | |
85e6fe83 | 522 | else if ((COP*)curcop == &compiling) { |
a0d0e21e | 523 | stash = curstash; |
748a9306 LW |
524 | if (add && (hints & HINT_STRICT_VARS) && |
525 | sv_type != SVt_PVCV && | |
526 | sv_type != SVt_PVGV && | |
4633a7c4 | 527 | sv_type != SVt_PVFM && |
c07a80fd | 528 | sv_type != SVt_PVIO && |
377b8fbc | 529 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
748a9306 | 530 | { |
4633a7c4 LW |
531 | gvp = (GV**)hv_fetch(stash,name,len,0); |
532 | if (!gvp || | |
a5f75d66 AD |
533 | *gvp == (GV*)&sv_undef || |
534 | SvTYPE(*gvp) != SVt_PVGV) | |
535 | { | |
4633a7c4 | 536 | stash = 0; |
a5f75d66 AD |
537 | } |
538 | else if (sv_type == SVt_PV && !GvIMPORTED_SV(*gvp) || | |
539 | sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp) || | |
540 | sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp) ) | |
4633a7c4 | 541 | { |
a5f75d66 | 542 | warn("Variable \"%c%s\" is not imported", |
4633a7c4 LW |
543 | sv_type == SVt_PVAV ? '@' : |
544 | sv_type == SVt_PVHV ? '%' : '$', | |
545 | name); | |
8ebc5c01 | 546 | if (GvCVu(*gvp)) |
4633a7c4 | 547 | warn("(Did you mean &%s instead?)\n", name); |
a0d0e21e | 548 | stash = 0; |
4633a7c4 | 549 | } |
a0d0e21e | 550 | } |
85e6fe83 | 551 | } |
463ee0b2 LW |
552 | else |
553 | stash = curcop->cop_stash; | |
554 | } | |
555 | else | |
556 | stash = defstash; | |
557 | } | |
558 | ||
559 | /* By this point we should have a stash and a name */ | |
560 | ||
a0d0e21e LW |
561 | if (!stash) { |
562 | if (add) { | |
563 | warn("Global symbol \"%s\" requires explicit package name", name); | |
564 | ++error_count; | |
565 | stash = curstash ? curstash : defstash; /* avoid core dumps */ | |
9607fc9c | 566 | add_gvflags = ((sv_type == SVt_PV) ? GVf_IMPORTED_SV |
567 | : (sv_type == SVt_PVAV) ? GVf_IMPORTED_AV | |
568 | : (sv_type == SVt_PVHV) ? GVf_IMPORTED_HV | |
569 | : 0); | |
a0d0e21e LW |
570 | } |
571 | else | |
572 | return Nullgv; | |
573 | } | |
574 | ||
575 | if (!SvREFCNT(stash)) /* symbol table under destruction */ | |
576 | return Nullgv; | |
577 | ||
79072805 LW |
578 | gvp = (GV**)hv_fetch(stash,name,len,add); |
579 | if (!gvp || *gvp == (GV*)&sv_undef) | |
580 | return Nullgv; | |
581 | gv = *gvp; | |
582 | if (SvTYPE(gv) == SVt_PVGV) { | |
a0d0e21e | 583 | if (add) { |
a5f75d66 | 584 | GvMULTI_on(gv); |
a0d0e21e LW |
585 | gv_init_sv(gv, sv_type); |
586 | } | |
79072805 LW |
587 | return gv; |
588 | } | |
93a17b20 LW |
589 | |
590 | /* Adding a new symbol */ | |
591 | ||
a0d0e21e LW |
592 | if (add & 4) |
593 | warn("Had to create %s unexpectedly", nambeg); | |
463ee0b2 | 594 | gv_init(gv, stash, name, len, add & 2); |
a0d0e21e | 595 | gv_init_sv(gv, sv_type); |
9607fc9c | 596 | GvFLAGS(gv) |= add_gvflags; |
93a17b20 LW |
597 | |
598 | /* set up magic where warranted */ | |
599 | switch (*name) { | |
a0d0e21e LW |
600 | case 'A': |
601 | if (strEQ(name, "ARGV")) { | |
602 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; | |
603 | } | |
604 | break; | |
605 | ||
ed6116ce LW |
606 | case 'a': |
607 | case 'b': | |
608 | if (len == 1) | |
a5f75d66 | 609 | GvMULTI_on(gv); |
ed6116ce | 610 | break; |
a0d0e21e LW |
611 | case 'E': |
612 | if (strnEQ(name, "EXPORT", 6)) | |
a5f75d66 | 613 | GvMULTI_on(gv); |
a0d0e21e | 614 | break; |
463ee0b2 LW |
615 | case 'I': |
616 | if (strEQ(name, "ISA")) { | |
617 | AV* av = GvAVn(gv); | |
a5f75d66 | 618 | GvMULTI_on(gv); |
a0d0e21e LW |
619 | sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0); |
620 | if (add & 2 && strEQ(nambeg,"AnyDBM_File::ISA") && AvFILL(av) == -1) | |
85e6fe83 | 621 | { |
a0d0e21e LW |
622 | char *pname; |
623 | av_push(av, newSVpv(pname = "NDBM_File",0)); | |
dc437b57 | 624 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e | 625 | av_push(av, newSVpv(pname = "DB_File",0)); |
dc437b57 | 626 | gv_stashpvn(pname, 7, TRUE); |
a0d0e21e | 627 | av_push(av, newSVpv(pname = "GDBM_File",0)); |
dc437b57 | 628 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e | 629 | av_push(av, newSVpv(pname = "SDBM_File",0)); |
dc437b57 | 630 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e | 631 | av_push(av, newSVpv(pname = "ODBM_File",0)); |
dc437b57 | 632 | gv_stashpvn(pname, 9, TRUE); |
85e6fe83 | 633 | } |
463ee0b2 LW |
634 | } |
635 | break; | |
a0d0e21e LW |
636 | #ifdef OVERLOAD |
637 | case 'O': | |
638 | if (strEQ(name, "OVERLOAD")) { | |
639 | HV* hv = GvHVn(gv); | |
a5f75d66 | 640 | GvMULTI_on(gv); |
a0d0e21e LW |
641 | sv_magic((SV*)hv, (SV*)gv, 'A', 0, 0); |
642 | } | |
643 | break; | |
644 | #endif /* OVERLOAD */ | |
93a17b20 LW |
645 | case 'S': |
646 | if (strEQ(name, "SIG")) { | |
647 | HV *hv; | |
dc437b57 | 648 | I32 i; |
93a17b20 | 649 | siggv = gv; |
a5f75d66 | 650 | GvMULTI_on(siggv); |
93a17b20 LW |
651 | hv = GvHVn(siggv); |
652 | hv_magic(hv, siggv, 'S'); | |
dc437b57 | 653 | for(i=1;sig_name[i];i++) { |
654 | SV ** init; | |
655 | init=hv_fetch(hv,sig_name[i],strlen(sig_name[i]),1); | |
656 | if(init) | |
657 | sv_setsv(*init,&sv_undef); | |
658 | psig_ptr[i] = 0; | |
659 | psig_name[i] = 0; | |
660 | } | |
93a17b20 LW |
661 | /* initialize signal stack */ |
662 | signalstack = newAV(); | |
93a17b20 | 663 | AvREAL_off(signalstack); |
a0d0e21e LW |
664 | av_extend(signalstack, 30); |
665 | av_fill(signalstack, 0); | |
93a17b20 LW |
666 | } |
667 | break; | |
668 | ||
669 | case '&': | |
463ee0b2 LW |
670 | if (len > 1) |
671 | break; | |
93a17b20 LW |
672 | ampergv = gv; |
673 | sawampersand = TRUE; | |
a0d0e21e | 674 | goto ro_magicalize; |
93a17b20 LW |
675 | |
676 | case '`': | |
463ee0b2 LW |
677 | if (len > 1) |
678 | break; | |
93a17b20 LW |
679 | leftgv = gv; |
680 | sawampersand = TRUE; | |
a0d0e21e | 681 | goto ro_magicalize; |
93a17b20 LW |
682 | |
683 | case '\'': | |
463ee0b2 LW |
684 | if (len > 1) |
685 | break; | |
93a17b20 LW |
686 | rightgv = gv; |
687 | sawampersand = TRUE; | |
a0d0e21e | 688 | goto ro_magicalize; |
93a17b20 LW |
689 | |
690 | case ':': | |
463ee0b2 LW |
691 | if (len > 1) |
692 | break; | |
93a17b20 LW |
693 | sv_setpv(GvSV(gv),chopset); |
694 | goto magicalize; | |
695 | ||
ff0cee69 | 696 | case '?': |
697 | if (len > 1) | |
698 | break; | |
699 | #ifdef COMPLEX_STATUS | |
700 | sv_upgrade(GvSV(gv), SVt_PVLV); | |
701 | #endif | |
702 | goto magicalize; | |
703 | ||
93a17b20 | 704 | case '#': |
a0d0e21e LW |
705 | case '*': |
706 | if (dowarn && len == 1 && sv_type == SVt_PV) | |
707 | warn("Use of $%s is deprecated", name); | |
708 | /* FALL THROUGH */ | |
709 | case '[': | |
710 | case '!': | |
93a17b20 LW |
711 | case '^': |
712 | case '~': | |
713 | case '=': | |
714 | case '-': | |
715 | case '%': | |
716 | case '.': | |
93a17b20 LW |
717 | case '(': |
718 | case ')': | |
719 | case '<': | |
720 | case '>': | |
721 | case ',': | |
722 | case '\\': | |
723 | case '/': | |
93a17b20 | 724 | case '|': |
748a9306 | 725 | case '\001': |
93a17b20 | 726 | case '\004': |
ad8898e0 | 727 | case '\005': |
748a9306 | 728 | case '\006': |
a0d0e21e | 729 | case '\010': |
ad8898e0 | 730 | case '\017': |
93a17b20 LW |
731 | case '\t': |
732 | case '\020': | |
733 | case '\024': | |
734 | case '\027': | |
463ee0b2 LW |
735 | if (len > 1) |
736 | break; | |
737 | goto magicalize; | |
738 | ||
a0d0e21e | 739 | case '+': |
463ee0b2 LW |
740 | case '1': |
741 | case '2': | |
742 | case '3': | |
743 | case '4': | |
744 | case '5': | |
745 | case '6': | |
746 | case '7': | |
747 | case '8': | |
748 | case '9': | |
fb73857a | 749 | case '\023': |
a0d0e21e LW |
750 | ro_magicalize: |
751 | SvREADONLY_on(GvSV(gv)); | |
93a17b20 | 752 | magicalize: |
463ee0b2 | 753 | sv_magic(GvSV(gv), (SV*)gv, 0, name, len); |
93a17b20 LW |
754 | break; |
755 | ||
756 | case '\014': | |
463ee0b2 LW |
757 | if (len > 1) |
758 | break; | |
93a17b20 LW |
759 | sv_setpv(GvSV(gv),"\f"); |
760 | formfeed = GvSV(gv); | |
761 | break; | |
762 | case ';': | |
463ee0b2 LW |
763 | if (len > 1) |
764 | break; | |
93a17b20 LW |
765 | sv_setpv(GvSV(gv),"\034"); |
766 | break; | |
463ee0b2 LW |
767 | case ']': |
768 | if (len == 1) { | |
f86702cc | 769 | SV *sv = GvSV(gv); |
93a17b20 | 770 | sv_upgrade(sv, SVt_PVNV); |
a0d0e21e | 771 | sv_setpv(sv, patchlevel); |
f86702cc | 772 | (void)sv_2nv(sv); |
773 | SvREADONLY_on(sv); | |
93a17b20 LW |
774 | } |
775 | break; | |
79072805 | 776 | } |
93a17b20 | 777 | return gv; |
79072805 LW |
778 | } |
779 | ||
780 | void | |
f6aff53a | 781 | gv_fullname3(sv, gv, prefix) |
79072805 LW |
782 | SV *sv; |
783 | GV *gv; | |
f967eb5f | 784 | char *prefix; |
79072805 LW |
785 | { |
786 | HV *hv = GvSTASH(gv); | |
f967eb5f | 787 | if (!hv) { |
788 | SvOK_off(sv); | |
79072805 | 789 | return; |
f967eb5f | 790 | } |
791 | sv_setpv(sv, prefix ? prefix : ""); | |
79072805 | 792 | sv_catpv(sv,HvNAME(hv)); |
463ee0b2 | 793 | sv_catpvn(sv,"::", 2); |
79072805 LW |
794 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
795 | } | |
796 | ||
797 | void | |
f6aff53a | 798 | gv_efullname3(sv, gv, prefix) |
79072805 LW |
799 | SV *sv; |
800 | GV *gv; | |
f967eb5f | 801 | char *prefix; |
79072805 | 802 | { |
f967eb5f | 803 | GV *egv = GvEGV(gv); |
748a9306 LW |
804 | if (!egv) |
805 | egv = gv; | |
f6aff53a | 806 | gv_fullname3(sv, egv, prefix); |
807 | } | |
808 | ||
809 | /* XXX compatibility with versions <= 5.003. */ | |
810 | void | |
811 | gv_fullname(sv,gv) | |
812 | SV *sv; | |
813 | GV *gv; | |
814 | { | |
815 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); | |
816 | } | |
817 | ||
818 | /* XXX compatibility with versions <= 5.003. */ | |
819 | void | |
820 | gv_efullname(sv,gv) | |
821 | SV *sv; | |
822 | GV *gv; | |
823 | { | |
824 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); | |
79072805 LW |
825 | } |
826 | ||
827 | IO * | |
828 | newIO() | |
829 | { | |
11343788 | 830 | dTHR; |
79072805 | 831 | IO *io; |
8990e307 LW |
832 | GV *iogv; |
833 | ||
834 | io = (IO*)NEWSV(0,0); | |
a0d0e21e | 835 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 LW |
836 | SvREFCNT(io) = 1; |
837 | SvOBJECT_on(io); | |
c9de509e GA |
838 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
839 | if (!iogv) | |
840 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); | |
8990e307 | 841 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 LW |
842 | return io; |
843 | } | |
844 | ||
845 | void | |
463ee0b2 LW |
846 | gv_check(stash) |
847 | HV* stash; | |
79072805 | 848 | { |
11343788 | 849 | dTHR; |
79072805 LW |
850 | register HE *entry; |
851 | register I32 i; | |
852 | register GV *gv; | |
463ee0b2 | 853 | HV *hv; |
a0d0e21e | 854 | GV *filegv; |
463ee0b2 | 855 | |
8990e307 LW |
856 | if (!HvARRAY(stash)) |
857 | return; | |
a0d0e21e | 858 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
dc437b57 | 859 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
860 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && | |
861 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv)) | |
a0d0e21e LW |
862 | { |
863 | if (hv != defstash) | |
864 | gv_check(hv); /* nested package */ | |
865 | } | |
dc437b57 | 866 | else if (isALPHA(*HeKEY(entry))) { |
867 | gv = (GV*)HeVAL(entry); | |
a5f75d66 | 868 | if (GvMULTI(gv)) |
463ee0b2 LW |
869 | continue; |
870 | curcop->cop_line = GvLINE(gv); | |
a0d0e21e LW |
871 | filegv = GvFILEGV(gv); |
872 | curcop->cop_filegv = filegv; | |
a5f75d66 | 873 | if (filegv && GvMULTI(filegv)) /* Filename began with slash */ |
8990e307 | 874 | continue; |
dc437b57 | 875 | warn("Name \"%s::%s\" used only once: possible typo", |
a0d0e21e | 876 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 | 877 | } |
79072805 LW |
878 | } |
879 | } | |
880 | } | |
881 | ||
882 | GV * | |
a0d0e21e LW |
883 | newGVgen(pack) |
884 | char *pack; | |
79072805 | 885 | { |
46fc3d4c | 886 | return gv_fetchpv(form("%s::_GEN_%ld", pack, (long)gensym++), |
887 | TRUE, SVt_PVGV); | |
79072805 LW |
888 | } |
889 | ||
890 | /* hopefully this is only called on local symbol table entries */ | |
891 | ||
892 | GP* | |
893 | gp_ref(gp) | |
894 | GP* gp; | |
895 | { | |
896 | gp->gp_refcnt++; | |
44a8e56a | 897 | if (gp->gp_cv) { |
898 | if (gp->gp_cvgen) { | |
899 | /* multi-named GPs cannot be used for method cache */ | |
900 | SvREFCNT_dec(gp->gp_cv); | |
901 | gp->gp_cv = Nullcv; | |
902 | gp->gp_cvgen = 0; | |
903 | } | |
904 | else { | |
905 | /* Adding a new name to a subroutine invalidates method cache */ | |
906 | sub_generation++; | |
907 | } | |
908 | } | |
79072805 | 909 | return gp; |
79072805 LW |
910 | } |
911 | ||
912 | void | |
913 | gp_free(gv) | |
914 | GV* gv; | |
915 | { | |
79072805 | 916 | GP* gp; |
377b8fbc | 917 | CV* cv; |
79072805 LW |
918 | |
919 | if (!gv || !(gp = GvGP(gv))) | |
920 | return; | |
921 | if (gp->gp_refcnt == 0) { | |
922 | warn("Attempt to free unreferenced glob pointers"); | |
923 | return; | |
924 | } | |
44a8e56a | 925 | if (gp->gp_cv) { |
926 | /* Deleting the name of a subroutine invalidates method cache */ | |
927 | sub_generation++; | |
928 | } | |
748a9306 LW |
929 | if (--gp->gp_refcnt > 0) { |
930 | if (gp->gp_egv == gv) | |
931 | gp->gp_egv = 0; | |
79072805 | 932 | return; |
748a9306 | 933 | } |
79072805 | 934 | |
8990e307 LW |
935 | SvREFCNT_dec(gp->gp_sv); |
936 | SvREFCNT_dec(gp->gp_av); | |
937 | SvREFCNT_dec(gp->gp_hv); | |
377b8fbc | 938 | SvREFCNT_dec(gp->gp_io); |
a6006777 | 939 | SvREFCNT_dec(gp->gp_cv); |
748a9306 LW |
940 | SvREFCNT_dec(gp->gp_form); |
941 | ||
79072805 LW |
942 | Safefree(gp); |
943 | GvGP(gv) = 0; | |
944 | } | |
945 | ||
946 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) | |
947 | #define MICROPORT | |
948 | #endif | |
949 | ||
950 | #ifdef MICROPORT /* Microport 2.4 hack */ | |
951 | AV *GvAVn(gv) | |
952 | register GV *gv; | |
953 | { | |
954 | if (GvGP(gv)->gp_av) | |
955 | return GvGP(gv)->gp_av; | |
956 | else | |
957 | return GvGP(gv_AVadd(gv))->gp_av; | |
958 | } | |
959 | ||
960 | HV *GvHVn(gv) | |
961 | register GV *gv; | |
962 | { | |
963 | if (GvGP(gv)->gp_hv) | |
964 | return GvGP(gv)->gp_hv; | |
965 | else | |
966 | return GvGP(gv_HVadd(gv))->gp_hv; | |
967 | } | |
968 | #endif /* Microport 2.4 hack */ | |
a0d0e21e LW |
969 | |
970 | #ifdef OVERLOAD | |
971 | /* Updates and caches the CV's */ | |
972 | ||
973 | bool | |
974 | Gv_AMupdate(stash) | |
975 | HV* stash; | |
976 | { | |
11343788 | 977 | dTHR; |
a0d0e21e LW |
978 | GV** gvp; |
979 | HV* hv; | |
980 | GV* gv; | |
981 | CV* cv; | |
982 | MAGIC* mg=mg_find((SV*)stash,'c'); | |
748a9306 | 983 | AMT *amtp=mg ? (AMT*)mg->mg_ptr: NULL; |
a6006777 | 984 | AMT amt; |
a0d0e21e | 985 | |
e7ea3e70 IZ |
986 | if (mg && amtp->was_ok_am == amagic_generation |
987 | && amtp->was_ok_sub == sub_generation) | |
a6006777 | 988 | return AMT_AMAGIC(amtp); |
989 | if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */ | |
748a9306 | 990 | int i; |
a6006777 | 991 | for (i=1; i<NofAMmeth; i++) { |
748a9306 LW |
992 | if (amtp->table[i]) { |
993 | SvREFCNT_dec(amtp->table[i]); | |
994 | } | |
995 | } | |
996 | } | |
a0d0e21e LW |
997 | sv_unmagic((SV*)stash, 'c'); |
998 | ||
999 | DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) ); | |
1000 | ||
a6006777 | 1001 | amt.was_ok_am = amagic_generation; |
1002 | amt.was_ok_sub = sub_generation; | |
1003 | amt.fallback = AMGfallNO; | |
1004 | amt.flags = 0; | |
1005 | ||
1006 | #ifdef OVERLOAD_VIA_HASH | |
1007 | gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */ | |
a0d0e21e LW |
1008 | if (gvp && ((gv = *gvp) != (GV*)&sv_undef && (hv = GvHV(gv)))) { |
1009 | int filled=0; | |
1010 | int i; | |
1011 | char *cp; | |
a0d0e21e LW |
1012 | SV* sv; |
1013 | SV** svp; | |
a0d0e21e LW |
1014 | |
1015 | /* Work with "fallback" key, which we assume to be first in AMG_names */ | |
1016 | ||
a6006777 | 1017 | if (( cp = (char *)AMG_names[0] ) && |
1018 | (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) { | |
a0d0e21e LW |
1019 | if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1020 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; | |
1021 | } | |
a6006777 | 1022 | for (i = 1; i < NofAMmeth; i++) { |
1023 | cv = 0; | |
1024 | cp = (char *)AMG_names[i]; | |
1025 | ||
1026 | svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE); | |
dc437b57 | 1027 | if (svp && ((sv = *svp) != &sv_undef)) { |
a0d0e21e LW |
1028 | switch (SvTYPE(sv)) { |
1029 | default: | |
1030 | if (!SvROK(sv)) { | |
1031 | if (!SvOK(sv)) break; | |
748a9306 | 1032 | gv = gv_fetchmethod(stash, SvPV(sv, na)); |
a0d0e21e LW |
1033 | if (gv) cv = GvCV(gv); |
1034 | break; | |
1035 | } | |
1036 | cv = (CV*)SvRV(sv); | |
1037 | if (SvTYPE(cv) == SVt_PVCV) | |
1038 | break; | |
1039 | /* FALL THROUGH */ | |
1040 | case SVt_PVHV: | |
1041 | case SVt_PVAV: | |
a6006777 | 1042 | croak("Not a subroutine reference in overload table"); |
a0d0e21e LW |
1043 | return FALSE; |
1044 | case SVt_PVCV: | |
8ebc5c01 | 1045 | cv = (CV*)sv; |
1046 | break; | |
a0d0e21e | 1047 | case SVt_PVGV: |
8ebc5c01 | 1048 | if (!(cv = GvCVu((GV*)sv))) |
1049 | cv = sv_2cv(sv, &stash, &gv, TRUE); | |
1050 | break; | |
a0d0e21e LW |
1051 | } |
1052 | if (cv) filled=1; | |
1053 | else { | |
a6006777 | 1054 | croak("Method for operation %s not found in package %.256s during blessing\n", |
a0d0e21e LW |
1055 | cp,HvNAME(stash)); |
1056 | return FALSE; | |
1057 | } | |
1058 | } | |
a6006777 | 1059 | #else |
1060 | { | |
1061 | int filled = 0; | |
1062 | int i; | |
9607fc9c | 1063 | const char *cp; |
a6006777 | 1064 | SV* sv = NULL; |
1065 | SV** svp; | |
1066 | ||
1067 | /* Work with "fallback" key, which we assume to be first in AMG_names */ | |
1068 | ||
9607fc9c | 1069 | if ( cp = AMG_names[0] ) { |
a6006777 | 1070 | /* Try to find via inheritance. */ |
774d564b | 1071 | gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */ |
a6006777 | 1072 | if (gv) sv = GvSV(gv); |
1073 | ||
774d564b | 1074 | if (!gv) goto no_table; |
a6006777 | 1075 | else if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1076 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; | |
1077 | } | |
1078 | ||
1079 | for (i = 1; i < NofAMmeth; i++) { | |
46fc3d4c | 1080 | SV *cookie = sv_2mortal(newSVpvf("(%s", cp = AMG_names[i])); |
44a8e56a | 1081 | DEBUG_o( deb("Checking overloading of `%s' in package `%.256s'\n", |
1082 | cp, HvNAME(stash)) ); | |
46fc3d4c | 1083 | /* don't fill the cache while looking up! */ |
1084 | gv = gv_fetchmeth(stash, SvPVX(cookie), SvCUR(cookie), -1); | |
1085 | cv = 0; | |
44a8e56a | 1086 | if(gv && (cv = GvCV(gv))) { |
44a8e56a | 1087 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
1088 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { | |
1089 | /* GvSV contains the name of the method. */ | |
1090 | GV *ngv; | |
1091 | ||
1092 | DEBUG_o( deb("Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", | |
1093 | SvPV(GvSV(gv), na), cp, HvNAME(stash)) ); | |
dc848c6f | 1094 | if (!SvPOK(GvSV(gv)) |
1095 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), | |
1096 | FALSE))) | |
1097 | { | |
44a8e56a | 1098 | /* Can be an import stub (created by `can'). */ |
1099 | if (GvCVGEN(gv)) { | |
1100 | croak("Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", | |
1101 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), | |
1102 | cp, HvNAME(stash)); | |
1103 | } else | |
1104 | croak("Cannot resolve method `%.256s' overloading `%s' in package `%.256s'", | |
1105 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), | |
1106 | cp, HvNAME(stash)); | |
1107 | } | |
dc848c6f | 1108 | cv = GvCV(gv = ngv); |
44a8e56a | 1109 | } |
1110 | DEBUG_o( deb("Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", | |
1111 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), | |
1112 | GvNAME(CvGV(cv))) ); | |
1113 | filled = 1; | |
1114 | } | |
a6006777 | 1115 | #endif |
1116 | amt.table[i]=(CV*)SvREFCNT_inc(cv); | |
a0d0e21e | 1117 | } |
a0d0e21e | 1118 | if (filled) { |
a6006777 | 1119 | AMT_AMAGIC_on(&amt); |
1120 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT)); | |
a0d0e21e LW |
1121 | return TRUE; |
1122 | } | |
1123 | } | |
a6006777 | 1124 | /* Here we have no table: */ |
774d564b | 1125 | no_table: |
a6006777 | 1126 | AMT_AMAGIC_off(&amt); |
1127 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS)); | |
a0d0e21e LW |
1128 | return FALSE; |
1129 | } | |
1130 | ||
1131 | /* During call to this subroutine stack can be reallocated. It is | |
1132 | * advised to call SPAGAIN macro in your code after call */ | |
1133 | ||
1134 | SV* | |
1135 | amagic_call(left,right,method,flags) | |
1136 | SV* left; | |
1137 | SV* right; | |
1138 | int method; | |
1139 | int flags; | |
1140 | { | |
11343788 | 1141 | dTHR; |
a0d0e21e LW |
1142 | MAGIC *mg; |
1143 | CV *cv; | |
1144 | CV **cvp=NULL, **ocvp=NULL; | |
1145 | AMT *amtp, *oamtp; | |
1146 | int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; | |
748a9306 | 1147 | int postpr=0, inc_dec_ass=0, assignshift=assign?1:0; |
a0d0e21e LW |
1148 | HV* stash; |
1149 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) | |
1150 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c')) | |
a6006777 | 1151 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1152 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table | |
1153 | : NULL)) | |
748a9306 LW |
1154 | && ((cv = cvp[off=method+assignshift]) |
1155 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to | |
1156 | * usual method */ | |
1157 | (fl = 1, cv = cvp[off=method])))) { | |
a0d0e21e LW |
1158 | lr = -1; /* Call method for left argument */ |
1159 | } else { | |
1160 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { | |
1161 | int logic; | |
1162 | ||
1163 | /* look for substituted methods */ | |
1164 | switch (method) { | |
1165 | case inc_amg: | |
748a9306 | 1166 | if (((cv = cvp[off=add_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e LW |
1167 | || ((cv = cvp[off=add_amg]) && (postpr=1))) { |
1168 | right = &sv_yes; lr = -1; assign = 1; | |
1169 | } | |
1170 | break; | |
1171 | case dec_amg: | |
748a9306 | 1172 | if (((cv = cvp[off=subtr_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e LW |
1173 | || ((cv = cvp[off=subtr_amg]) && (postpr=1))) { |
1174 | right = &sv_yes; lr = -1; assign = 1; | |
1175 | } | |
1176 | break; | |
1177 | case bool__amg: | |
1178 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); | |
1179 | break; | |
1180 | case numer_amg: | |
1181 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); | |
1182 | break; | |
1183 | case string_amg: | |
1184 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); | |
1185 | break; | |
dc437b57 | 1186 | case not_amg: |
1187 | (void)((cv = cvp[off=bool__amg]) | |
1188 | || (cv = cvp[off=numer_amg]) | |
1189 | || (cv = cvp[off=string_amg])); | |
1190 | postpr = 1; | |
1191 | break; | |
748a9306 LW |
1192 | case copy_amg: |
1193 | { | |
1194 | SV* ref=SvRV(left); | |
fc36a67e | 1195 | if (!SvROK(ref) && SvTYPE(ref) <= SVt_PVMG) { |
1196 | /* | |
1197 | * Just to be extra cautious. Maybe in some | |
1198 | * additional cases sv_setsv is safe, too. | |
1199 | */ | |
748a9306 LW |
1200 | SV* newref = newSVsv(ref); |
1201 | SvOBJECT_on(newref); | |
1202 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(ref)); | |
1203 | return newref; | |
1204 | } | |
1205 | } | |
1206 | break; | |
a0d0e21e | 1207 | case abs_amg: |
748a9306 | 1208 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e | 1209 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 | 1210 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e | 1211 | if (off1==lt_amg) { |
748a9306 | 1212 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
1213 | lt_amg,AMGf_noright); |
1214 | logic = SvTRUE(lessp); | |
1215 | } else { | |
748a9306 | 1216 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
1217 | ncmp_amg,AMGf_noright); |
1218 | logic = (SvNV(lessp) < 0); | |
1219 | } | |
1220 | if (logic) { | |
1221 | if (off==subtr_amg) { | |
1222 | right = left; | |
748a9306 | 1223 | left = nullsv; |
a0d0e21e LW |
1224 | lr = 1; |
1225 | } | |
1226 | } else { | |
1227 | return left; | |
1228 | } | |
1229 | } | |
1230 | break; | |
1231 | case neg_amg: | |
1232 | if (cv = cvp[off=subtr_amg]) { | |
1233 | right = left; | |
1234 | left = sv_2mortal(newSViv(0)); | |
1235 | lr = 1; | |
1236 | } | |
1237 | break; | |
1238 | default: | |
1239 | goto not_found; | |
1240 | } | |
1241 | if (!cv) goto not_found; | |
1242 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) | |
1243 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c')) | |
a6006777 | 1244 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1245 | ? (amtp = (AMT*)mg->mg_ptr)->table | |
1246 | : NULL)) | |
a0d0e21e LW |
1247 | && (cv = cvp[off=method])) { /* Method for right |
1248 | * argument found */ | |
1249 | lr=1; | |
748a9306 | 1250 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
4633a7c4 | 1251 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e LW |
1252 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1253 | && !(flags & AMGf_unary)) { | |
1254 | /* We look for substitution for | |
1255 | * comparison operations and | |
fc36a67e | 1256 | * concatenation */ |
a0d0e21e LW |
1257 | if (method==concat_amg || method==concat_ass_amg |
1258 | || method==repeat_amg || method==repeat_ass_amg) { | |
1259 | return NULL; /* Delegate operation to string conversion */ | |
1260 | } | |
1261 | off = -1; | |
1262 | switch (method) { | |
1263 | case lt_amg: | |
1264 | case le_amg: | |
1265 | case gt_amg: | |
1266 | case ge_amg: | |
1267 | case eq_amg: | |
1268 | case ne_amg: | |
1269 | postpr = 1; off=ncmp_amg; break; | |
1270 | case slt_amg: | |
1271 | case sle_amg: | |
1272 | case sgt_amg: | |
1273 | case sge_amg: | |
1274 | case seq_amg: | |
1275 | case sne_amg: | |
1276 | postpr = 1; off=scmp_amg; break; | |
1277 | } | |
1278 | if (off != -1) cv = cvp[off]; | |
1279 | if (!cv) { | |
1280 | goto not_found; | |
1281 | } | |
1282 | } else { | |
a6006777 | 1283 | not_found: /* No method found, either report or croak */ |
a0d0e21e LW |
1284 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1285 | notfound = 1; lr = -1; | |
1286 | } else if (cvp && (cv=cvp[nomethod_amg])) { | |
1287 | notfound = 1; lr = 1; | |
1288 | } else { | |
46fc3d4c | 1289 | SV *msg; |
774d564b | 1290 | if (off==-1) off=method; |
46fc3d4c | 1291 | msg = sv_2mortal(newSVpvf( |
1292 | "Operation `%s': no method found,%sargument %s%s%s%s", | |
a6006777 | 1293 | AMG_names[method + assignshift], |
e7ea3e70 | 1294 | (flags & AMGf_unary ? " " : "\n\tleft "), |
a0d0e21e LW |
1295 | SvAMAGIC(left)? |
1296 | "in overloaded package ": | |
1297 | "has no overloaded magic", | |
1298 | SvAMAGIC(left)? | |
1299 | HvNAME(SvSTASH(SvRV(left))): | |
1300 | "", | |
1301 | SvAMAGIC(right)? | |
e7ea3e70 IZ |
1302 | ",\n\tright argument in overloaded package ": |
1303 | (flags & AMGf_unary | |
1304 | ? "" | |
1305 | : ",\n\tright argument has no overloaded magic"), | |
a0d0e21e LW |
1306 | SvAMAGIC(right)? |
1307 | HvNAME(SvSTASH(SvRV(right))): | |
46fc3d4c | 1308 | "")); |
a0d0e21e | 1309 | if (amtp && amtp->fallback >= AMGfallYES) { |
46fc3d4c | 1310 | DEBUG_o( deb("%s", SvPVX(msg)) ); |
a0d0e21e | 1311 | } else { |
fc36a67e | 1312 | croak("%_", msg); |
a0d0e21e LW |
1313 | } |
1314 | return NULL; | |
1315 | } | |
1316 | } | |
1317 | } | |
1318 | if (!notfound) { | |
774d564b | 1319 | DEBUG_o( deb( |
46fc3d4c | 1320 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
a6006777 | 1321 | AMG_names[off], |
748a9306 LW |
1322 | method+assignshift==off? "" : |
1323 | " (initially `", | |
1324 | method+assignshift==off? "" : | |
a6006777 | 1325 | AMG_names[method+assignshift], |
748a9306 LW |
1326 | method+assignshift==off? "" : "')", |
1327 | flags & AMGf_unary? "" : | |
1328 | lr==1 ? " for right argument": " for left argument", | |
1329 | flags & AMGf_unary? " for argument" : "", | |
a0d0e21e LW |
1330 | HvNAME(stash), |
1331 | fl? ",\n\tassignment variant used": "") ); | |
748a9306 LW |
1332 | /* Since we use shallow copy during assignment, we need |
1333 | * to dublicate the contents, probably calling user-supplied | |
1334 | * version of copy operator | |
1335 | */ | |
c07a80fd | 1336 | if ((method + assignshift==off |
748a9306 LW |
1337 | && (assign || method==inc_amg || method==dec_amg)) |
1338 | || inc_dec_ass) RvDEEPCP(left); | |
a0d0e21e LW |
1339 | } |
1340 | { | |
11343788 | 1341 | dTHR; |
a0d0e21e LW |
1342 | dSP; |
1343 | BINOP myop; | |
1344 | SV* res; | |
54310121 | 1345 | bool oldcatch = CATCH_GET; |
a0d0e21e | 1346 | |
54310121 | 1347 | CATCH_SET(TRUE); |
a0d0e21e LW |
1348 | Zero(&myop, 1, BINOP); |
1349 | myop.op_last = (OP *) &myop; | |
1350 | myop.op_next = Nullop; | |
54310121 | 1351 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e LW |
1352 | |
1353 | ENTER; | |
462e5cf6 | 1354 | SAVEOP(); |
a0d0e21e | 1355 | op = (OP *) &myop; |
84902520 | 1356 | if (PERLDB_SUB && curstash != debstash) |
dc437b57 | 1357 | op->op_private |= OPpENTERSUB_DB; |
a0d0e21e | 1358 | PUTBACK; |
11343788 | 1359 | pp_pushmark(ARGS); |
a0d0e21e LW |
1360 | |
1361 | EXTEND(sp, notfound + 5); | |
1362 | PUSHs(lr>0? right: left); | |
1363 | PUSHs(lr>0? left: right); | |
5167a5b1 | 1364 | PUSHs( lr > 0 ? &sv_yes : ( assign ? &sv_undef : &sv_no )); |
a0d0e21e | 1365 | if (notfound) { |
a6006777 | 1366 | PUSHs( sv_2mortal(newSVpv((char *)AMG_names[method + assignshift],0)) ); |
a0d0e21e LW |
1367 | } |
1368 | PUSHs((SV*)cv); | |
1369 | PUTBACK; | |
1370 | ||
11343788 | 1371 | if (op = pp_entersub(ARGS)) |
ad8898e0 | 1372 | runops(); |
a0d0e21e LW |
1373 | LEAVE; |
1374 | SPAGAIN; | |
1375 | ||
1376 | res=POPs; | |
1377 | PUTBACK; | |
54310121 | 1378 | CATCH_SET(oldcatch); |
a0d0e21e | 1379 | |
a0d0e21e LW |
1380 | if (postpr) { |
1381 | int ans; | |
1382 | switch (method) { | |
1383 | case le_amg: | |
1384 | case sle_amg: | |
1385 | ans=SvIV(res)<=0; break; | |
1386 | case lt_amg: | |
1387 | case slt_amg: | |
1388 | ans=SvIV(res)<0; break; | |
1389 | case ge_amg: | |
1390 | case sge_amg: | |
1391 | ans=SvIV(res)>=0; break; | |
1392 | case gt_amg: | |
1393 | case sgt_amg: | |
1394 | ans=SvIV(res)>0; break; | |
1395 | case eq_amg: | |
1396 | case seq_amg: | |
1397 | ans=SvIV(res)==0; break; | |
1398 | case ne_amg: | |
1399 | case sne_amg: | |
1400 | ans=SvIV(res)!=0; break; | |
1401 | case inc_amg: | |
1402 | case dec_amg: | |
bbce6d69 | 1403 | SvSetSV(left,res); return left; |
dc437b57 | 1404 | case not_amg: |
44a8e56a | 1405 | ans=!SvOK(res); break; |
a0d0e21e | 1406 | } |
54310121 | 1407 | return boolSV(ans); |
748a9306 LW |
1408 | } else if (method==copy_amg) { |
1409 | if (!SvROK(res)) { | |
a6006777 | 1410 | croak("Copy method did not return a reference"); |
748a9306 LW |
1411 | } |
1412 | return SvREFCNT_inc(SvRV(res)); | |
a0d0e21e LW |
1413 | } else { |
1414 | return res; | |
1415 | } | |
1416 | } | |
1417 | } | |
1418 | #endif /* OVERLOAD */ |