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