Commit | Line | Data |
a0d0e21e |
1 | /* gv.c |
79072805 |
2 | * |
9607fc9c |
3 | * Copyright (c) 1991-1997, Larry Wall |
79072805 |
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 |
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 |
17 | */ |
18 | |
19 | #include "EXTERN.h" |
20 | #include "perl.h" |
21 | |
71be2cbc |
22 | EXT char rcsid[]; |
93a17b20 |
23 | |
79072805 |
24 | GV * |
25 | gv_AVadd(gv) |
26 | register GV *gv; |
27 | { |
a0d0e21e |
28 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
29 | croak("Bad symbol for array"); |
79072805 |
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 |
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 |
43 | return gv; |
44 | } |
45 | |
46 | GV * |
a0d0e21e |
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 |
58 | gv_fetchfile(name) |
59 | char *name; |
60 | { |
53d95988 |
61 | char smallbuf[256]; |
62 | char *tmpbuf; |
8ebc5c01 |
63 | STRLEN tmplen; |
79072805 |
64 | GV *gv; |
65 | |
53d95988 |
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 |
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); |
79072805 |
82 | if (perldb) |
93a17b20 |
83 | hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L'); |
79072805 |
84 | return gv; |
85 | } |
86 | |
463ee0b2 |
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 |
98 | if (SvLEN(gv)) |
99 | Safefree(SvPVX(gv)); |
44a8e56a |
100 | Newz(602, gp, 1, GP); |
8990e307 |
101 | GvGP(gv) = gp_ref(gp); |
463ee0b2 |
102 | GvSV(gv) = NEWSV(72,0); |
103 | GvLINE(gv) = curcop->cop_line; |
8990e307 |
104 | GvFILEGV(gv) = curcop->cop_filegv; |
463ee0b2 |
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 |
109 | GvNAMELEN(gv) = len; |
110 | if (multi) |
a5f75d66 |
111 | GvMULTI_on(gv); |
463ee0b2 |
112 | } |
113 | |
a0d0e21e |
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 |
134 | HV* stash; |
135 | char* name; |
463ee0b2 |
136 | STRLEN len; |
a0d0e21e |
137 | I32 level; |
79072805 |
138 | { |
139 | AV* av; |
463ee0b2 |
140 | GV* topgv; |
79072805 |
141 | GV* gv; |
463ee0b2 |
142 | GV** gvp; |
748a9306 |
143 | CV* cv; |
a0d0e21e |
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 |
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 |
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 |
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 |
239 | return gv; |
240 | } |
241 | } |
242 | } |
243 | |
79072805 |
244 | return 0; |
245 | } |
246 | |
247 | GV * |
463ee0b2 |
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 |
262 | char *nsplit = 0; |
263 | GV* gv; |
463ee0b2 |
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 |
270 | } |
271 | if (nsplit) { |
a0d0e21e |
272 | char *origname = name; |
273 | name = nsplit + 1; |
a0d0e21e |
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 |
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 |
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 |
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 |
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 |
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 |
403 | } |
404 | |
a0d0e21e |
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 |
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 |
423 | register char *name = nambeg; |
424 | register GV *gv = 0; |
79072805 |
425 | GV**gvp; |
79072805 |
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 |
436 | if ((*namend == '\'' && namend[1]) || |
437 | (*namend == ':' && namend[1] == ':')) |
438 | { |
463ee0b2 |
439 | if (!stash) |
440 | stash = defstash; |
dc437b57 |
441 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e |
442 | return Nullgv; |
463ee0b2 |
443 | |
85e6fe83 |
444 | len = namend - name; |
445 | if (len > 0) { |
a0d0e21e |
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 |
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 |
459 | else if (!add) |
460 | return Nullgv; |
463ee0b2 |
461 | else |
462 | gv_init(gv, stash, nambeg, namend - nambeg, (add & 2)); |
85e6fe83 |
463 | |
463ee0b2 |
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 |
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 |
479 | len = namend - name; |
480 | if (!len) |
481 | len = 1; |
463ee0b2 |
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 |
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 |
514 | if (global) |
515 | stash = defstash; |
85e6fe83 |
516 | else if ((COP*)curcop == &compiling) { |
a0d0e21e |
517 | stash = curstash; |
748a9306 |
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 |
525 | gvp = (GV**)hv_fetch(stash,name,len,0); |
526 | if (!gvp || |
a5f75d66 |
527 | *gvp == (GV*)&sv_undef || |
528 | SvTYPE(*gvp) != SVt_PVGV) |
529 | { |
4633a7c4 |
530 | stash = 0; |
a5f75d66 |
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 |
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 |
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 |
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 |
564 | } |
565 | else |
566 | return Nullgv; |
567 | } |
568 | |
569 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
570 | return Nullgv; |
571 | |
79072805 |
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 |
579 | gv_init_sv(gv, sv_type); |
580 | } |
79072805 |
581 | return gv; |
582 | } |
93a17b20 |
583 | |
584 | /* Adding a new symbol */ |
585 | |
a0d0e21e |
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 |
591 | |
592 | /* set up magic where warranted */ |
593 | switch (*name) { |
a0d0e21e |
594 | case 'A': |
595 | if (strEQ(name, "ARGV")) { |
596 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
597 | } |
598 | break; |
599 | |
ed6116ce |
600 | case 'a': |
601 | case 'b': |
602 | if (len == 1) |
a5f75d66 |
603 | GvMULTI_on(gv); |
ed6116ce |
604 | break; |
a0d0e21e |
605 | case 'E': |
606 | if (strnEQ(name, "EXPORT", 6)) |
a5f75d66 |
607 | GvMULTI_on(gv); |
a0d0e21e |
608 | break; |
463ee0b2 |
609 | case 'I': |
610 | if (strEQ(name, "ISA")) { |
611 | AV* av = GvAVn(gv); |
a5f75d66 |
612 | GvMULTI_on(gv); |
a0d0e21e |
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 |
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 |
628 | } |
629 | break; |
a0d0e21e |
630 | #ifdef OVERLOAD |
631 | case 'O': |
632 | if (strEQ(name, "OVERLOAD")) { |
633 | HV* hv = GvHVn(gv); |
a5f75d66 |
634 | GvMULTI_on(gv); |
a0d0e21e |
635 | sv_magic((SV*)hv, (SV*)gv, 'A', 0, 0); |
636 | } |
637 | break; |
638 | #endif /* OVERLOAD */ |
93a17b20 |
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 |
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 |
655 | /* initialize signal stack */ |
656 | signalstack = newAV(); |
93a17b20 |
657 | AvREAL_off(signalstack); |
a0d0e21e |
658 | av_extend(signalstack, 30); |
659 | av_fill(signalstack, 0); |
93a17b20 |
660 | } |
661 | break; |
662 | |
663 | case '&': |
463ee0b2 |
664 | if (len > 1) |
665 | break; |
93a17b20 |
666 | ampergv = gv; |
667 | sawampersand = TRUE; |
a0d0e21e |
668 | goto ro_magicalize; |
93a17b20 |
669 | |
670 | case '`': |
463ee0b2 |
671 | if (len > 1) |
672 | break; |
93a17b20 |
673 | leftgv = gv; |
674 | sawampersand = TRUE; |
a0d0e21e |
675 | goto ro_magicalize; |
93a17b20 |
676 | |
677 | case '\'': |
463ee0b2 |
678 | if (len > 1) |
679 | break; |
93a17b20 |
680 | rightgv = gv; |
681 | sawampersand = TRUE; |
a0d0e21e |
682 | goto ro_magicalize; |
93a17b20 |
683 | |
684 | case ':': |
463ee0b2 |
685 | if (len > 1) |
686 | break; |
93a17b20 |
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 |
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 |
705 | case '^': |
706 | case '~': |
707 | case '=': |
708 | case '-': |
709 | case '%': |
710 | case '.': |
93a17b20 |
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 |
725 | case '\t': |
726 | case '\020': |
727 | case '\024': |
728 | case '\027': |
463ee0b2 |
729 | if (len > 1) |
730 | break; |
731 | goto magicalize; |
732 | |
a0d0e21e |
733 | case '+': |
463ee0b2 |
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 |
743 | ro_magicalize: |
744 | SvREADONLY_on(GvSV(gv)); |
93a17b20 |
745 | magicalize: |
463ee0b2 |
746 | sv_magic(GvSV(gv), (SV*)gv, 0, name, len); |
93a17b20 |
747 | break; |
748 | |
749 | case '\014': |
463ee0b2 |
750 | if (len > 1) |
751 | break; |
93a17b20 |
752 | sv_setpv(GvSV(gv),"\f"); |
753 | formfeed = GvSV(gv); |
754 | break; |
755 | case ';': |
463ee0b2 |
756 | if (len > 1) |
757 | break; |
93a17b20 |
758 | sv_setpv(GvSV(gv),"\034"); |
759 | break; |
463ee0b2 |
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 |
767 | } |
768 | break; |
79072805 |
769 | } |
93a17b20 |
770 | return gv; |
79072805 |
771 | } |
772 | |
773 | void |
f6aff53a |
774 | gv_fullname3(sv, gv, prefix) |
79072805 |
775 | SV *sv; |
776 | GV *gv; |
f967eb5f |
777 | char *prefix; |
79072805 |
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 |
787 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
788 | } |
789 | |
790 | void |
f6aff53a |
791 | gv_efullname3(sv, gv, prefix) |
79072805 |
792 | SV *sv; |
793 | GV *gv; |
f967eb5f |
794 | char *prefix; |
79072805 |
795 | { |
f967eb5f |
796 | GV *egv = GvEGV(gv); |
748a9306 |
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 |
818 | } |
819 | |
820 | IO * |
821 | newIO() |
822 | { |
823 | IO *io; |
8990e307 |
824 | GV *iogv; |
825 | |
826 | io = (IO*)NEWSV(0,0); |
a0d0e21e |
827 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 |
828 | SvREFCNT(io) = 1; |
829 | SvOBJECT_on(io); |
dc437b57 |
830 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
8990e307 |
831 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 |
832 | return io; |
833 | } |
834 | |
835 | void |
463ee0b2 |
836 | gv_check(stash) |
837 | HV* stash; |
79072805 |
838 | { |
839 | register HE *entry; |
840 | register I32 i; |
841 | register GV *gv; |
463ee0b2 |
842 | HV *hv; |
a0d0e21e |
843 | GV *filegv; |
463ee0b2 |
844 | |
8990e307 |
845 | if (!HvARRAY(stash)) |
846 | return; |
a0d0e21e |
847 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
dc437b57 |
848 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
849 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
850 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv)) |
a0d0e21e |
851 | { |
852 | if (hv != defstash) |
853 | gv_check(hv); /* nested package */ |
854 | } |
dc437b57 |
855 | else if (isALPHA(*HeKEY(entry))) { |
856 | gv = (GV*)HeVAL(entry); |
a5f75d66 |
857 | if (GvMULTI(gv)) |
463ee0b2 |
858 | continue; |
859 | curcop->cop_line = GvLINE(gv); |
a0d0e21e |
860 | filegv = GvFILEGV(gv); |
861 | curcop->cop_filegv = filegv; |
a5f75d66 |
862 | if (filegv && GvMULTI(filegv)) /* Filename began with slash */ |
8990e307 |
863 | continue; |
dc437b57 |
864 | warn("Name \"%s::%s\" used only once: possible typo", |
a0d0e21e |
865 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 |
866 | } |
79072805 |
867 | } |
868 | } |
869 | } |
870 | |
871 | GV * |
a0d0e21e |
872 | newGVgen(pack) |
873 | char *pack; |
79072805 |
874 | { |
46fc3d4c |
875 | return gv_fetchpv(form("%s::_GEN_%ld", pack, (long)gensym++), |
876 | TRUE, SVt_PVGV); |
79072805 |
877 | } |
878 | |
879 | /* hopefully this is only called on local symbol table entries */ |
880 | |
881 | GP* |
882 | gp_ref(gp) |
883 | GP* gp; |
884 | { |
885 | gp->gp_refcnt++; |
44a8e56a |
886 | if (gp->gp_cv) { |
887 | if (gp->gp_cvgen) { |
888 | /* multi-named GPs cannot be used for method cache */ |
889 | SvREFCNT_dec(gp->gp_cv); |
890 | gp->gp_cv = Nullcv; |
891 | gp->gp_cvgen = 0; |
892 | } |
893 | else { |
894 | /* Adding a new name to a subroutine invalidates method cache */ |
895 | sub_generation++; |
896 | } |
897 | } |
79072805 |
898 | return gp; |
79072805 |
899 | } |
900 | |
901 | void |
902 | gp_free(gv) |
903 | GV* gv; |
904 | { |
79072805 |
905 | GP* gp; |
377b8fbc |
906 | CV* cv; |
79072805 |
907 | |
908 | if (!gv || !(gp = GvGP(gv))) |
909 | return; |
910 | if (gp->gp_refcnt == 0) { |
911 | warn("Attempt to free unreferenced glob pointers"); |
912 | return; |
913 | } |
44a8e56a |
914 | if (gp->gp_cv) { |
915 | /* Deleting the name of a subroutine invalidates method cache */ |
916 | sub_generation++; |
917 | } |
748a9306 |
918 | if (--gp->gp_refcnt > 0) { |
919 | if (gp->gp_egv == gv) |
920 | gp->gp_egv = 0; |
79072805 |
921 | return; |
748a9306 |
922 | } |
79072805 |
923 | |
8990e307 |
924 | SvREFCNT_dec(gp->gp_sv); |
925 | SvREFCNT_dec(gp->gp_av); |
926 | SvREFCNT_dec(gp->gp_hv); |
377b8fbc |
927 | SvREFCNT_dec(gp->gp_io); |
a6006777 |
928 | SvREFCNT_dec(gp->gp_cv); |
748a9306 |
929 | SvREFCNT_dec(gp->gp_form); |
930 | |
79072805 |
931 | Safefree(gp); |
932 | GvGP(gv) = 0; |
933 | } |
934 | |
935 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) |
936 | #define MICROPORT |
937 | #endif |
938 | |
939 | #ifdef MICROPORT /* Microport 2.4 hack */ |
940 | AV *GvAVn(gv) |
941 | register GV *gv; |
942 | { |
943 | if (GvGP(gv)->gp_av) |
944 | return GvGP(gv)->gp_av; |
945 | else |
946 | return GvGP(gv_AVadd(gv))->gp_av; |
947 | } |
948 | |
949 | HV *GvHVn(gv) |
950 | register GV *gv; |
951 | { |
952 | if (GvGP(gv)->gp_hv) |
953 | return GvGP(gv)->gp_hv; |
954 | else |
955 | return GvGP(gv_HVadd(gv))->gp_hv; |
956 | } |
957 | #endif /* Microport 2.4 hack */ |
a0d0e21e |
958 | |
959 | #ifdef OVERLOAD |
960 | /* Updates and caches the CV's */ |
961 | |
962 | bool |
963 | Gv_AMupdate(stash) |
964 | HV* stash; |
965 | { |
966 | GV** gvp; |
967 | HV* hv; |
968 | GV* gv; |
969 | CV* cv; |
970 | MAGIC* mg=mg_find((SV*)stash,'c'); |
748a9306 |
971 | AMT *amtp=mg ? (AMT*)mg->mg_ptr: NULL; |
a6006777 |
972 | AMT amt; |
a0d0e21e |
973 | |
e7ea3e70 |
974 | if (mg && amtp->was_ok_am == amagic_generation |
975 | && amtp->was_ok_sub == sub_generation) |
a6006777 |
976 | return AMT_AMAGIC(amtp); |
977 | if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */ |
748a9306 |
978 | int i; |
a6006777 |
979 | for (i=1; i<NofAMmeth; i++) { |
748a9306 |
980 | if (amtp->table[i]) { |
981 | SvREFCNT_dec(amtp->table[i]); |
982 | } |
983 | } |
984 | } |
a0d0e21e |
985 | sv_unmagic((SV*)stash, 'c'); |
986 | |
987 | DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) ); |
988 | |
a6006777 |
989 | amt.was_ok_am = amagic_generation; |
990 | amt.was_ok_sub = sub_generation; |
991 | amt.fallback = AMGfallNO; |
992 | amt.flags = 0; |
993 | |
994 | #ifdef OVERLOAD_VIA_HASH |
995 | gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */ |
a0d0e21e |
996 | if (gvp && ((gv = *gvp) != (GV*)&sv_undef && (hv = GvHV(gv)))) { |
997 | int filled=0; |
998 | int i; |
999 | char *cp; |
a0d0e21e |
1000 | SV* sv; |
1001 | SV** svp; |
a0d0e21e |
1002 | |
1003 | /* Work with "fallback" key, which we assume to be first in AMG_names */ |
1004 | |
a6006777 |
1005 | if (( cp = (char *)AMG_names[0] ) && |
1006 | (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) { |
a0d0e21e |
1007 | if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1008 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
1009 | } |
a6006777 |
1010 | for (i = 1; i < NofAMmeth; i++) { |
1011 | cv = 0; |
1012 | cp = (char *)AMG_names[i]; |
1013 | |
1014 | svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE); |
dc437b57 |
1015 | if (svp && ((sv = *svp) != &sv_undef)) { |
a0d0e21e |
1016 | switch (SvTYPE(sv)) { |
1017 | default: |
1018 | if (!SvROK(sv)) { |
1019 | if (!SvOK(sv)) break; |
748a9306 |
1020 | gv = gv_fetchmethod(stash, SvPV(sv, na)); |
a0d0e21e |
1021 | if (gv) cv = GvCV(gv); |
1022 | break; |
1023 | } |
1024 | cv = (CV*)SvRV(sv); |
1025 | if (SvTYPE(cv) == SVt_PVCV) |
1026 | break; |
1027 | /* FALL THROUGH */ |
1028 | case SVt_PVHV: |
1029 | case SVt_PVAV: |
a6006777 |
1030 | croak("Not a subroutine reference in overload table"); |
a0d0e21e |
1031 | return FALSE; |
1032 | case SVt_PVCV: |
8ebc5c01 |
1033 | cv = (CV*)sv; |
1034 | break; |
a0d0e21e |
1035 | case SVt_PVGV: |
8ebc5c01 |
1036 | if (!(cv = GvCVu((GV*)sv))) |
1037 | cv = sv_2cv(sv, &stash, &gv, TRUE); |
1038 | break; |
a0d0e21e |
1039 | } |
1040 | if (cv) filled=1; |
1041 | else { |
a6006777 |
1042 | croak("Method for operation %s not found in package %.256s during blessing\n", |
a0d0e21e |
1043 | cp,HvNAME(stash)); |
1044 | return FALSE; |
1045 | } |
1046 | } |
a6006777 |
1047 | #else |
1048 | { |
1049 | int filled = 0; |
1050 | int i; |
9607fc9c |
1051 | const char *cp; |
a6006777 |
1052 | SV* sv = NULL; |
1053 | SV** svp; |
1054 | |
1055 | /* Work with "fallback" key, which we assume to be first in AMG_names */ |
1056 | |
9607fc9c |
1057 | if ( cp = AMG_names[0] ) { |
a6006777 |
1058 | /* Try to find via inheritance. */ |
774d564b |
1059 | gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */ |
a6006777 |
1060 | if (gv) sv = GvSV(gv); |
1061 | |
774d564b |
1062 | if (!gv) goto no_table; |
a6006777 |
1063 | else if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1064 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
1065 | } |
1066 | |
1067 | for (i = 1; i < NofAMmeth; i++) { |
46fc3d4c |
1068 | SV *cookie = sv_2mortal(newSVpvf("(%s", cp = AMG_names[i])); |
44a8e56a |
1069 | DEBUG_o( deb("Checking overloading of `%s' in package `%.256s'\n", |
1070 | cp, HvNAME(stash)) ); |
46fc3d4c |
1071 | /* don't fill the cache while looking up! */ |
1072 | gv = gv_fetchmeth(stash, SvPVX(cookie), SvCUR(cookie), -1); |
1073 | cv = 0; |
44a8e56a |
1074 | if(gv && (cv = GvCV(gv))) { |
44a8e56a |
1075 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
1076 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { |
1077 | /* GvSV contains the name of the method. */ |
1078 | GV *ngv; |
1079 | |
1080 | DEBUG_o( deb("Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", |
1081 | SvPV(GvSV(gv), na), cp, HvNAME(stash)) ); |
dc848c6f |
1082 | if (!SvPOK(GvSV(gv)) |
1083 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), |
1084 | FALSE))) |
1085 | { |
44a8e56a |
1086 | /* Can be an import stub (created by `can'). */ |
1087 | if (GvCVGEN(gv)) { |
1088 | croak("Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", |
1089 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1090 | cp, HvNAME(stash)); |
1091 | } else |
1092 | croak("Cannot resolve method `%.256s' overloading `%s' in package `%.256s'", |
1093 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1094 | cp, HvNAME(stash)); |
1095 | } |
dc848c6f |
1096 | cv = GvCV(gv = ngv); |
44a8e56a |
1097 | } |
1098 | DEBUG_o( deb("Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", |
1099 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), |
1100 | GvNAME(CvGV(cv))) ); |
1101 | filled = 1; |
1102 | } |
a6006777 |
1103 | #endif |
1104 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e |
1105 | } |
a0d0e21e |
1106 | if (filled) { |
a6006777 |
1107 | AMT_AMAGIC_on(&amt); |
1108 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT)); |
a0d0e21e |
1109 | return TRUE; |
1110 | } |
1111 | } |
a6006777 |
1112 | /* Here we have no table: */ |
774d564b |
1113 | no_table: |
a6006777 |
1114 | AMT_AMAGIC_off(&amt); |
1115 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1116 | return FALSE; |
1117 | } |
1118 | |
1119 | /* During call to this subroutine stack can be reallocated. It is |
1120 | * advised to call SPAGAIN macro in your code after call */ |
1121 | |
1122 | SV* |
1123 | amagic_call(left,right,method,flags) |
1124 | SV* left; |
1125 | SV* right; |
1126 | int method; |
1127 | int flags; |
1128 | { |
1129 | MAGIC *mg; |
1130 | CV *cv; |
1131 | CV **cvp=NULL, **ocvp=NULL; |
1132 | AMT *amtp, *oamtp; |
1133 | int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; |
748a9306 |
1134 | int postpr=0, inc_dec_ass=0, assignshift=assign?1:0; |
a0d0e21e |
1135 | HV* stash; |
1136 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
1137 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c')) |
a6006777 |
1138 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1139 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
1140 | : NULL)) |
748a9306 |
1141 | && ((cv = cvp[off=method+assignshift]) |
1142 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1143 | * usual method */ |
1144 | (fl = 1, cv = cvp[off=method])))) { |
a0d0e21e |
1145 | lr = -1; /* Call method for left argument */ |
1146 | } else { |
1147 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1148 | int logic; |
1149 | |
1150 | /* look for substituted methods */ |
1151 | switch (method) { |
1152 | case inc_amg: |
748a9306 |
1153 | if (((cv = cvp[off=add_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e |
1154 | || ((cv = cvp[off=add_amg]) && (postpr=1))) { |
1155 | right = &sv_yes; lr = -1; assign = 1; |
1156 | } |
1157 | break; |
1158 | case dec_amg: |
748a9306 |
1159 | if (((cv = cvp[off=subtr_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e |
1160 | || ((cv = cvp[off=subtr_amg]) && (postpr=1))) { |
1161 | right = &sv_yes; lr = -1; assign = 1; |
1162 | } |
1163 | break; |
1164 | case bool__amg: |
1165 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1166 | break; |
1167 | case numer_amg: |
1168 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1169 | break; |
1170 | case string_amg: |
1171 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1172 | break; |
dc437b57 |
1173 | case not_amg: |
1174 | (void)((cv = cvp[off=bool__amg]) |
1175 | || (cv = cvp[off=numer_amg]) |
1176 | || (cv = cvp[off=string_amg])); |
1177 | postpr = 1; |
1178 | break; |
748a9306 |
1179 | case copy_amg: |
1180 | { |
1181 | SV* ref=SvRV(left); |
fc36a67e |
1182 | if (!SvROK(ref) && SvTYPE(ref) <= SVt_PVMG) { |
1183 | /* |
1184 | * Just to be extra cautious. Maybe in some |
1185 | * additional cases sv_setsv is safe, too. |
1186 | */ |
748a9306 |
1187 | SV* newref = newSVsv(ref); |
1188 | SvOBJECT_on(newref); |
1189 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(ref)); |
1190 | return newref; |
1191 | } |
1192 | } |
1193 | break; |
a0d0e21e |
1194 | case abs_amg: |
748a9306 |
1195 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1196 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 |
1197 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1198 | if (off1==lt_amg) { |
748a9306 |
1199 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1200 | lt_amg,AMGf_noright); |
1201 | logic = SvTRUE(lessp); |
1202 | } else { |
748a9306 |
1203 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1204 | ncmp_amg,AMGf_noright); |
1205 | logic = (SvNV(lessp) < 0); |
1206 | } |
1207 | if (logic) { |
1208 | if (off==subtr_amg) { |
1209 | right = left; |
748a9306 |
1210 | left = nullsv; |
a0d0e21e |
1211 | lr = 1; |
1212 | } |
1213 | } else { |
1214 | return left; |
1215 | } |
1216 | } |
1217 | break; |
1218 | case neg_amg: |
1219 | if (cv = cvp[off=subtr_amg]) { |
1220 | right = left; |
1221 | left = sv_2mortal(newSViv(0)); |
1222 | lr = 1; |
1223 | } |
1224 | break; |
1225 | default: |
1226 | goto not_found; |
1227 | } |
1228 | if (!cv) goto not_found; |
1229 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
1230 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c')) |
a6006777 |
1231 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1232 | ? (amtp = (AMT*)mg->mg_ptr)->table |
1233 | : NULL)) |
a0d0e21e |
1234 | && (cv = cvp[off=method])) { /* Method for right |
1235 | * argument found */ |
1236 | lr=1; |
748a9306 |
1237 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
4633a7c4 |
1238 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1239 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1240 | && !(flags & AMGf_unary)) { |
1241 | /* We look for substitution for |
1242 | * comparison operations and |
fc36a67e |
1243 | * concatenation */ |
a0d0e21e |
1244 | if (method==concat_amg || method==concat_ass_amg |
1245 | || method==repeat_amg || method==repeat_ass_amg) { |
1246 | return NULL; /* Delegate operation to string conversion */ |
1247 | } |
1248 | off = -1; |
1249 | switch (method) { |
1250 | case lt_amg: |
1251 | case le_amg: |
1252 | case gt_amg: |
1253 | case ge_amg: |
1254 | case eq_amg: |
1255 | case ne_amg: |
1256 | postpr = 1; off=ncmp_amg; break; |
1257 | case slt_amg: |
1258 | case sle_amg: |
1259 | case sgt_amg: |
1260 | case sge_amg: |
1261 | case seq_amg: |
1262 | case sne_amg: |
1263 | postpr = 1; off=scmp_amg; break; |
1264 | } |
1265 | if (off != -1) cv = cvp[off]; |
1266 | if (!cv) { |
1267 | goto not_found; |
1268 | } |
1269 | } else { |
a6006777 |
1270 | not_found: /* No method found, either report or croak */ |
a0d0e21e |
1271 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1272 | notfound = 1; lr = -1; |
1273 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1274 | notfound = 1; lr = 1; |
1275 | } else { |
46fc3d4c |
1276 | SV *msg; |
774d564b |
1277 | if (off==-1) off=method; |
46fc3d4c |
1278 | msg = sv_2mortal(newSVpvf( |
1279 | "Operation `%s': no method found,%sargument %s%s%s%s", |
a6006777 |
1280 | AMG_names[method + assignshift], |
e7ea3e70 |
1281 | (flags & AMGf_unary ? " " : "\n\tleft "), |
a0d0e21e |
1282 | SvAMAGIC(left)? |
1283 | "in overloaded package ": |
1284 | "has no overloaded magic", |
1285 | SvAMAGIC(left)? |
1286 | HvNAME(SvSTASH(SvRV(left))): |
1287 | "", |
1288 | SvAMAGIC(right)? |
e7ea3e70 |
1289 | ",\n\tright argument in overloaded package ": |
1290 | (flags & AMGf_unary |
1291 | ? "" |
1292 | : ",\n\tright argument has no overloaded magic"), |
a0d0e21e |
1293 | SvAMAGIC(right)? |
1294 | HvNAME(SvSTASH(SvRV(right))): |
46fc3d4c |
1295 | "")); |
a0d0e21e |
1296 | if (amtp && amtp->fallback >= AMGfallYES) { |
46fc3d4c |
1297 | DEBUG_o( deb("%s", SvPVX(msg)) ); |
a0d0e21e |
1298 | } else { |
fc36a67e |
1299 | croak("%_", msg); |
a0d0e21e |
1300 | } |
1301 | return NULL; |
1302 | } |
1303 | } |
1304 | } |
1305 | if (!notfound) { |
774d564b |
1306 | DEBUG_o( deb( |
46fc3d4c |
1307 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
a6006777 |
1308 | AMG_names[off], |
748a9306 |
1309 | method+assignshift==off? "" : |
1310 | " (initially `", |
1311 | method+assignshift==off? "" : |
a6006777 |
1312 | AMG_names[method+assignshift], |
748a9306 |
1313 | method+assignshift==off? "" : "')", |
1314 | flags & AMGf_unary? "" : |
1315 | lr==1 ? " for right argument": " for left argument", |
1316 | flags & AMGf_unary? " for argument" : "", |
a0d0e21e |
1317 | HvNAME(stash), |
1318 | fl? ",\n\tassignment variant used": "") ); |
748a9306 |
1319 | /* Since we use shallow copy during assignment, we need |
1320 | * to dublicate the contents, probably calling user-supplied |
1321 | * version of copy operator |
1322 | */ |
c07a80fd |
1323 | if ((method + assignshift==off |
748a9306 |
1324 | && (assign || method==inc_amg || method==dec_amg)) |
1325 | || inc_dec_ass) RvDEEPCP(left); |
a0d0e21e |
1326 | } |
1327 | { |
1328 | dSP; |
1329 | BINOP myop; |
1330 | SV* res; |
54310121 |
1331 | bool oldcatch = CATCH_GET; |
a0d0e21e |
1332 | |
54310121 |
1333 | CATCH_SET(TRUE); |
a0d0e21e |
1334 | Zero(&myop, 1, BINOP); |
1335 | myop.op_last = (OP *) &myop; |
1336 | myop.op_next = Nullop; |
54310121 |
1337 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1338 | |
1339 | ENTER; |
1340 | SAVESPTR(op); |
1341 | op = (OP *) &myop; |
dc437b57 |
1342 | if (perldb && curstash != debstash) |
1343 | op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1344 | PUTBACK; |
1345 | pp_pushmark(); |
1346 | |
1347 | EXTEND(sp, notfound + 5); |
1348 | PUSHs(lr>0? right: left); |
1349 | PUSHs(lr>0? left: right); |
5167a5b1 |
1350 | PUSHs( lr > 0 ? &sv_yes : ( assign ? &sv_undef : &sv_no )); |
a0d0e21e |
1351 | if (notfound) { |
a6006777 |
1352 | PUSHs( sv_2mortal(newSVpv((char *)AMG_names[method + assignshift],0)) ); |
a0d0e21e |
1353 | } |
1354 | PUSHs((SV*)cv); |
1355 | PUTBACK; |
1356 | |
1357 | if (op = pp_entersub()) |
ad8898e0 |
1358 | runops(); |
a0d0e21e |
1359 | LEAVE; |
1360 | SPAGAIN; |
1361 | |
1362 | res=POPs; |
1363 | PUTBACK; |
54310121 |
1364 | CATCH_SET(oldcatch); |
a0d0e21e |
1365 | |
a0d0e21e |
1366 | if (postpr) { |
1367 | int ans; |
1368 | switch (method) { |
1369 | case le_amg: |
1370 | case sle_amg: |
1371 | ans=SvIV(res)<=0; break; |
1372 | case lt_amg: |
1373 | case slt_amg: |
1374 | ans=SvIV(res)<0; break; |
1375 | case ge_amg: |
1376 | case sge_amg: |
1377 | ans=SvIV(res)>=0; break; |
1378 | case gt_amg: |
1379 | case sgt_amg: |
1380 | ans=SvIV(res)>0; break; |
1381 | case eq_amg: |
1382 | case seq_amg: |
1383 | ans=SvIV(res)==0; break; |
1384 | case ne_amg: |
1385 | case sne_amg: |
1386 | ans=SvIV(res)!=0; break; |
1387 | case inc_amg: |
1388 | case dec_amg: |
bbce6d69 |
1389 | SvSetSV(left,res); return left; |
dc437b57 |
1390 | case not_amg: |
44a8e56a |
1391 | ans=!SvOK(res); break; |
a0d0e21e |
1392 | } |
54310121 |
1393 | return boolSV(ans); |
748a9306 |
1394 | } else if (method==copy_amg) { |
1395 | if (!SvROK(res)) { |
a6006777 |
1396 | croak("Copy method did not return a reference"); |
748a9306 |
1397 | } |
1398 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1399 | } else { |
1400 | return res; |
1401 | } |
1402 | } |
1403 | } |
1404 | #endif /* OVERLOAD */ |