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