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