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 | { |
61 | char tmpbuf[1200]; |
8ebc5c01 |
62 | STRLEN tmplen; |
79072805 |
63 | GV *gv; |
64 | |
8ebc5c01 |
65 | sprintf(tmpbuf, "_<%s", name); |
66 | tmplen = strlen(tmpbuf); |
67 | gv = *(GV**)hv_fetch(defstash, tmpbuf, tmplen, TRUE); |
68 | if (!isGV(gv)) |
69 | gv_init(gv, defstash, tmpbuf, tmplen, FALSE); |
79072805 |
70 | sv_setpv(GvSV(gv), name); |
8ebc5c01 |
71 | if (*name == '/' && (instr(name, "/lib/") || instr(name, ".pm"))) |
a5f75d66 |
72 | GvMULTI_on(gv); |
79072805 |
73 | if (perldb) |
93a17b20 |
74 | hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L'); |
79072805 |
75 | return gv; |
76 | } |
77 | |
463ee0b2 |
78 | void |
79 | gv_init(gv, stash, name, len, multi) |
80 | GV *gv; |
81 | HV *stash; |
82 | char *name; |
83 | STRLEN len; |
84 | int multi; |
85 | { |
86 | register GP *gp; |
87 | |
dc437b57 |
88 | sv_upgrade((SV*)gv, SVt_PVGV); |
463ee0b2 |
89 | if (SvLEN(gv)) |
90 | Safefree(SvPVX(gv)); |
44a8e56a |
91 | Newz(602, gp, 1, GP); |
8990e307 |
92 | GvGP(gv) = gp_ref(gp); |
463ee0b2 |
93 | GvSV(gv) = NEWSV(72,0); |
94 | GvLINE(gv) = curcop->cop_line; |
8990e307 |
95 | GvFILEGV(gv) = curcop->cop_filegv; |
463ee0b2 |
96 | GvEGV(gv) = gv; |
97 | sv_magic((SV*)gv, (SV*)gv, '*', name, len); |
98 | GvSTASH(gv) = stash; |
a0d0e21e |
99 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 |
100 | GvNAMELEN(gv) = len; |
101 | if (multi) |
a5f75d66 |
102 | GvMULTI_on(gv); |
463ee0b2 |
103 | } |
104 | |
a0d0e21e |
105 | static void |
106 | gv_init_sv(gv, sv_type) |
107 | GV* gv; |
108 | I32 sv_type; |
109 | { |
110 | switch (sv_type) { |
111 | case SVt_PVIO: |
112 | (void)GvIOn(gv); |
113 | break; |
114 | case SVt_PVAV: |
115 | (void)GvAVn(gv); |
116 | break; |
117 | case SVt_PVHV: |
118 | (void)GvHVn(gv); |
119 | break; |
120 | } |
121 | } |
122 | |
79072805 |
123 | GV * |
a0d0e21e |
124 | gv_fetchmeth(stash, name, len, level) |
79072805 |
125 | HV* stash; |
126 | char* name; |
463ee0b2 |
127 | STRLEN len; |
a0d0e21e |
128 | I32 level; |
79072805 |
129 | { |
130 | AV* av; |
463ee0b2 |
131 | GV* topgv; |
79072805 |
132 | GV* gv; |
463ee0b2 |
133 | GV** gvp; |
748a9306 |
134 | CV* cv; |
a0d0e21e |
135 | |
136 | if (!stash) |
137 | return 0; |
44a8e56a |
138 | if ((level > 100) || (level < -100)) |
a0d0e21e |
139 | croak("Recursive inheritance detected"); |
463ee0b2 |
140 | |
463ee0b2 |
141 | DEBUG_o( deb("Looking for method %s in package %s\n",name,HvNAME(stash)) ); |
44a8e56a |
142 | |
143 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
144 | if (!gvp) |
145 | topgv = Nullgv; |
146 | else { |
147 | topgv = *gvp; |
148 | if (SvTYPE(topgv) != SVt_PVGV) |
149 | gv_init(topgv, stash, name, len, TRUE); |
150 | if (cv = GvCV(topgv)) { |
151 | /* If genuine method or valid cache entry, use it */ |
152 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) >= sub_generation) |
7a4c00b4 |
153 | return topgv; |
44a8e56a |
154 | /* Stale cached entry: junk it */ |
155 | SvREFCNT_dec(cv); |
156 | GvCV(topgv) = cv = Nullcv; |
157 | GvCVGEN(topgv) = 0; |
748a9306 |
158 | } |
463ee0b2 |
159 | } |
79072805 |
160 | |
9607fc9c |
161 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
162 | av = (gvp && (gv = *gvp) && gv != (GV*)&sv_undef) ? GvAV(gv) : Nullav; |
163 | |
164 | /* create @.*::SUPER::ISA on demand */ |
165 | if (!av) { |
166 | char* packname = HvNAME(stash); |
167 | STRLEN packlen = strlen(packname); |
168 | |
169 | if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) { |
170 | HV* basestash; |
171 | |
172 | packlen -= 7; |
173 | basestash = gv_stashpvn(packname, packlen, TRUE); |
174 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); |
175 | if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) { |
176 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
177 | if (!gvp || !(gv = *gvp)) |
178 | croak("Cannot create %s::ISA", HvNAME(stash)); |
179 | if (SvTYPE(gv) != SVt_PVGV) |
180 | gv_init(gv, stash, "ISA", 3, TRUE); |
181 | SvREFCNT_dec(GvAV(gv)); |
182 | GvAV(gv) = (AV*)SvREFCNT_inc(av); |
183 | } |
184 | } |
185 | } |
186 | |
187 | if (av) { |
79072805 |
188 | SV** svp = AvARRAY(av); |
189 | I32 items = AvFILL(av) + 1; |
190 | while (items--) { |
79072805 |
191 | SV* sv = *svp++; |
a0d0e21e |
192 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 |
193 | if (!basestash) { |
79072805 |
194 | if (dowarn) |
a0d0e21e |
195 | warn("Can't locate package %s for @%s::ISA", |
463ee0b2 |
196 | SvPVX(sv), HvNAME(stash)); |
79072805 |
197 | continue; |
198 | } |
44a8e56a |
199 | gv = gv_fetchmeth(basestash, name, len, |
200 | (level >= 0) ? level + 1 : level - 1); |
201 | if (gv) |
202 | goto gotcha; |
79072805 |
203 | } |
204 | } |
a0d0e21e |
205 | |
9607fc9c |
206 | /* if at top level, try UNIVERSAL */ |
207 | |
44a8e56a |
208 | if (level == 0 || level == -1) { |
9607fc9c |
209 | HV* lastchance; |
210 | |
dc437b57 |
211 | if (lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE)) { |
44a8e56a |
212 | if (gv = gv_fetchmeth(lastchance, name, len, |
213 | (level >= 0) ? level + 1 : level - 1)) { |
214 | gotcha: |
dc848c6f |
215 | /* |
216 | * Cache method in topgv if: |
217 | * 1. topgv has no synonyms (else inheritance crosses wires) |
218 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
219 | */ |
220 | if (topgv && |
221 | GvREFCNT(topgv) == 1 && |
222 | (cv = GvCV(gv)) && |
223 | (CvROOT(cv) || CvXSUB(cv))) |
224 | { |
44a8e56a |
225 | if (cv = GvCV(topgv)) |
226 | SvREFCNT_dec(cv); |
227 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
228 | GvCVGEN(topgv) = sub_generation; |
229 | } |
a0d0e21e |
230 | return gv; |
231 | } |
232 | } |
233 | } |
234 | |
79072805 |
235 | return 0; |
236 | } |
237 | |
238 | GV * |
463ee0b2 |
239 | gv_fetchmethod(stash, name) |
240 | HV* stash; |
241 | char* name; |
242 | { |
dc848c6f |
243 | return gv_fetchmethod_autoload(stash, name, TRUE); |
244 | } |
245 | |
246 | GV * |
247 | gv_fetchmethod_autoload(stash, name, autoload) |
248 | HV* stash; |
249 | char* name; |
250 | I32 autoload; |
251 | { |
463ee0b2 |
252 | register char *nend; |
a0d0e21e |
253 | char *nsplit = 0; |
254 | GV* gv; |
463ee0b2 |
255 | |
256 | for (nend = name; *nend; nend++) { |
9607fc9c |
257 | if (*nend == '\'') |
a0d0e21e |
258 | nsplit = nend; |
9607fc9c |
259 | else if (*nend == ':' && *(nend + 1) == ':') |
260 | nsplit = ++nend; |
a0d0e21e |
261 | } |
262 | if (nsplit) { |
a0d0e21e |
263 | char *origname = name; |
264 | name = nsplit + 1; |
a0d0e21e |
265 | if (*nsplit == ':') |
266 | --nsplit; |
9607fc9c |
267 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
268 | /* ->SUPER::method should really be looked up in original stash */ |
269 | SV *tmpstr = sv_2mortal(newSVpv(HvNAME(curcop->cop_stash), 0)); |
4633a7c4 |
270 | sv_catpvn(tmpstr, "::SUPER", 7); |
9607fc9c |
271 | stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); |
272 | DEBUG_o( deb("Treating %s as %s::%s\n", |
273 | origname, HvNAME(stash), name) ); |
4633a7c4 |
274 | } |
9607fc9c |
275 | else |
276 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); |
4633a7c4 |
277 | } |
278 | |
9607fc9c |
279 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
280 | if (!gv) { |
702887b4 |
281 | if (strEQ(name,"import")) |
dc437b57 |
282 | gv = (GV*)&sv_yes; |
dc848c6f |
283 | else if (autoload) |
54310121 |
284 | gv = gv_autoload4(stash, name, nend - name, TRUE); |
463ee0b2 |
285 | } |
dc848c6f |
286 | else if (autoload) { |
287 | CV* cv = GvCV(gv); |
09280a33 |
288 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
289 | GV* stubgv; |
290 | GV* autogv; |
291 | |
292 | if (CvANON(cv)) |
293 | stubgv = gv; |
294 | else { |
295 | stubgv = CvGV(cv); |
296 | if (GvCV(stubgv) != cv) /* orphaned import */ |
297 | stubgv = gv; |
298 | } |
299 | autogv = gv_autoload4(GvSTASH(stubgv), |
300 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
301 | if (autogv) |
302 | gv = autogv; |
303 | } |
304 | } |
44a8e56a |
305 | |
306 | return gv; |
307 | } |
308 | |
309 | GV* |
54310121 |
310 | gv_autoload4(stash, name, len, method) |
44a8e56a |
311 | HV* stash; |
312 | char* name; |
313 | STRLEN len; |
54310121 |
314 | I32 method; |
44a8e56a |
315 | { |
316 | static char autoload[] = "AUTOLOAD"; |
317 | static STRLEN autolen = 8; |
318 | GV* gv; |
319 | CV* cv; |
320 | HV* varstash; |
321 | GV* vargv; |
322 | SV* varsv; |
323 | |
324 | if (len == autolen && strnEQ(name, autoload, autolen)) |
325 | return Nullgv; |
dc848c6f |
326 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
327 | return Nullgv; |
328 | cv = GvCV(gv); |
329 | |
330 | /* |
331 | * Inheriting AUTOLOAD for non-methods works ... for now. |
332 | */ |
333 | if (dowarn && !method && (GvCVGEN(gv) || GvSTASH(gv) != stash)) |
334 | warn( |
335 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
336 | HvNAME(stash), (int)len, name); |
44a8e56a |
337 | |
338 | /* |
339 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
340 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
341 | * use that, but for lack of anything better we will use the sub's |
342 | * original package to look up $AUTOLOAD. |
343 | */ |
344 | varstash = GvSTASH(CvGV(cv)); |
345 | vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); |
346 | if (!isGV(vargv)) |
347 | gv_init(vargv, varstash, autoload, autolen, FALSE); |
348 | varsv = GvSV(vargv); |
349 | sv_setpv(varsv, HvNAME(stash)); |
350 | sv_catpvn(varsv, "::", 2); |
351 | sv_catpvn(varsv, name, len); |
352 | SvTAINTED_off(varsv); |
a0d0e21e |
353 | return gv; |
354 | } |
355 | |
356 | HV* |
357 | gv_stashpv(name,create) |
358 | char *name; |
359 | I32 create; |
360 | { |
dc437b57 |
361 | return gv_stashpvn(name, strlen(name), create); |
362 | } |
363 | |
364 | HV* |
365 | gv_stashpvn(name,namelen,create) |
366 | char *name; |
367 | U32 namelen; |
368 | I32 create; |
369 | { |
370 | char tmpbuf[1203]; |
a0d0e21e |
371 | HV *stash; |
372 | GV *tmpgv; |
dc437b57 |
373 | |
374 | if (namelen > 1200) { |
375 | namelen = 1200; |
376 | #ifdef VMS |
377 | warn("Weird package name \"%s\" truncated", name); |
378 | #else |
ff0cee69 |
379 | warn("Weird package name \"%.*s...\" truncated", (int)namelen, name); |
dc437b57 |
380 | #endif |
381 | } |
382 | Copy(name,tmpbuf,namelen,char); |
383 | tmpbuf[namelen++] = ':'; |
384 | tmpbuf[namelen++] = ':'; |
385 | tmpbuf[namelen] = '\0'; |
a0d0e21e |
386 | tmpgv = gv_fetchpv(tmpbuf,create, SVt_PVHV); |
387 | if (!tmpgv) |
388 | return 0; |
389 | if (!GvHV(tmpgv)) |
390 | GvHV(tmpgv) = newHV(); |
391 | stash = GvHV(tmpgv); |
392 | if (!HvNAME(stash)) |
393 | HvNAME(stash) = savepv(name); |
394 | return stash; |
463ee0b2 |
395 | } |
396 | |
a0d0e21e |
397 | HV* |
398 | gv_stashsv(sv,create) |
399 | SV *sv; |
400 | I32 create; |
401 | { |
dc437b57 |
402 | register char *ptr; |
403 | STRLEN len; |
404 | ptr = SvPV(sv,len); |
405 | return gv_stashpvn(ptr, len, create); |
a0d0e21e |
406 | } |
407 | |
408 | |
463ee0b2 |
409 | GV * |
a0d0e21e |
410 | gv_fetchpv(nambeg,add,sv_type) |
463ee0b2 |
411 | char *nambeg; |
79072805 |
412 | I32 add; |
a0d0e21e |
413 | I32 sv_type; |
79072805 |
414 | { |
463ee0b2 |
415 | register char *name = nambeg; |
416 | register GV *gv = 0; |
79072805 |
417 | GV**gvp; |
79072805 |
418 | I32 len; |
419 | register char *namend; |
463ee0b2 |
420 | HV *stash = 0; |
9607fc9c |
421 | U32 add_gvflags = 0; |
85e6fe83 |
422 | char *tmpbuf; |
79072805 |
423 | |
c07a80fd |
424 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
425 | name++; |
426 | |
79072805 |
427 | for (namend = name; *namend; namend++) { |
463ee0b2 |
428 | if ((*namend == '\'' && namend[1]) || |
429 | (*namend == ':' && namend[1] == ':')) |
430 | { |
463ee0b2 |
431 | if (!stash) |
432 | stash = defstash; |
dc437b57 |
433 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e |
434 | return Nullgv; |
463ee0b2 |
435 | |
85e6fe83 |
436 | len = namend - name; |
437 | if (len > 0) { |
a0d0e21e |
438 | New(601, tmpbuf, len+3, char); |
439 | Copy(name, tmpbuf, len, char); |
440 | tmpbuf[len++] = ':'; |
441 | tmpbuf[len++] = ':'; |
442 | tmpbuf[len] = '\0'; |
463ee0b2 |
443 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
85e6fe83 |
444 | Safefree(tmpbuf); |
463ee0b2 |
445 | if (!gvp || *gvp == (GV*)&sv_undef) |
446 | return Nullgv; |
447 | gv = *gvp; |
85e6fe83 |
448 | |
463ee0b2 |
449 | if (SvTYPE(gv) == SVt_PVGV) |
a5f75d66 |
450 | GvMULTI_on(gv); |
a0d0e21e |
451 | else if (!add) |
452 | return Nullgv; |
463ee0b2 |
453 | else |
454 | gv_init(gv, stash, nambeg, namend - nambeg, (add & 2)); |
85e6fe83 |
455 | |
463ee0b2 |
456 | if (!(stash = GvHV(gv))) |
457 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
458 | |
463ee0b2 |
459 | if (!HvNAME(stash)) |
a0d0e21e |
460 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 |
461 | } |
462 | |
463 | if (*namend == ':') |
464 | namend++; |
465 | namend++; |
466 | name = namend; |
467 | if (!*name) |
dc437b57 |
468 | return gv ? gv : (GV*)*hv_fetch(defstash, "main::", 6, TRUE); |
79072805 |
469 | } |
79072805 |
470 | } |
a0d0e21e |
471 | len = namend - name; |
472 | if (!len) |
473 | len = 1; |
463ee0b2 |
474 | |
475 | /* No stash in name, so see how we can default */ |
476 | |
477 | if (!stash) { |
478 | if (isIDFIRST(*name)) { |
9607fc9c |
479 | bool global = FALSE; |
480 | |
463ee0b2 |
481 | if (isUPPER(*name)) { |
482 | if (*name > 'I') { |
483 | if (*name == 'S' && ( |
484 | strEQ(name, "SIG") || |
485 | strEQ(name, "STDIN") || |
486 | strEQ(name, "STDOUT") || |
487 | strEQ(name, "STDERR") )) |
488 | global = TRUE; |
489 | } |
490 | else if (*name > 'E') { |
491 | if (*name == 'I' && strEQ(name, "INC")) |
492 | global = TRUE; |
493 | } |
494 | else if (*name > 'A') { |
495 | if (*name == 'E' && strEQ(name, "ENV")) |
496 | global = TRUE; |
497 | } |
498 | else if (*name == 'A' && ( |
499 | strEQ(name, "ARGV") || |
500 | strEQ(name, "ARGVOUT") )) |
501 | global = TRUE; |
502 | } |
503 | else if (*name == '_' && !name[1]) |
504 | global = TRUE; |
9607fc9c |
505 | |
463ee0b2 |
506 | if (global) |
507 | stash = defstash; |
85e6fe83 |
508 | else if ((COP*)curcop == &compiling) { |
a0d0e21e |
509 | stash = curstash; |
748a9306 |
510 | if (add && (hints & HINT_STRICT_VARS) && |
511 | sv_type != SVt_PVCV && |
512 | sv_type != SVt_PVGV && |
4633a7c4 |
513 | sv_type != SVt_PVFM && |
c07a80fd |
514 | sv_type != SVt_PVIO && |
377b8fbc |
515 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
748a9306 |
516 | { |
4633a7c4 |
517 | gvp = (GV**)hv_fetch(stash,name,len,0); |
518 | if (!gvp || |
a5f75d66 |
519 | *gvp == (GV*)&sv_undef || |
520 | SvTYPE(*gvp) != SVt_PVGV) |
521 | { |
4633a7c4 |
522 | stash = 0; |
a5f75d66 |
523 | } |
524 | else if (sv_type == SVt_PV && !GvIMPORTED_SV(*gvp) || |
525 | sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp) || |
526 | sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp) ) |
4633a7c4 |
527 | { |
a5f75d66 |
528 | warn("Variable \"%c%s\" is not imported", |
4633a7c4 |
529 | sv_type == SVt_PVAV ? '@' : |
530 | sv_type == SVt_PVHV ? '%' : '$', |
531 | name); |
8ebc5c01 |
532 | if (GvCVu(*gvp)) |
4633a7c4 |
533 | warn("(Did you mean &%s instead?)\n", name); |
a0d0e21e |
534 | stash = 0; |
4633a7c4 |
535 | } |
a0d0e21e |
536 | } |
85e6fe83 |
537 | } |
463ee0b2 |
538 | else |
539 | stash = curcop->cop_stash; |
540 | } |
541 | else |
542 | stash = defstash; |
543 | } |
544 | |
545 | /* By this point we should have a stash and a name */ |
546 | |
a0d0e21e |
547 | if (!stash) { |
548 | if (add) { |
549 | warn("Global symbol \"%s\" requires explicit package name", name); |
550 | ++error_count; |
551 | stash = curstash ? curstash : defstash; /* avoid core dumps */ |
9607fc9c |
552 | add_gvflags = ((sv_type == SVt_PV) ? GVf_IMPORTED_SV |
553 | : (sv_type == SVt_PVAV) ? GVf_IMPORTED_AV |
554 | : (sv_type == SVt_PVHV) ? GVf_IMPORTED_HV |
555 | : 0); |
a0d0e21e |
556 | } |
557 | else |
558 | return Nullgv; |
559 | } |
560 | |
561 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
562 | return Nullgv; |
563 | |
79072805 |
564 | gvp = (GV**)hv_fetch(stash,name,len,add); |
565 | if (!gvp || *gvp == (GV*)&sv_undef) |
566 | return Nullgv; |
567 | gv = *gvp; |
568 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
569 | if (add) { |
a5f75d66 |
570 | GvMULTI_on(gv); |
a0d0e21e |
571 | gv_init_sv(gv, sv_type); |
572 | } |
79072805 |
573 | return gv; |
574 | } |
93a17b20 |
575 | |
576 | /* Adding a new symbol */ |
577 | |
a0d0e21e |
578 | if (add & 4) |
579 | warn("Had to create %s unexpectedly", nambeg); |
463ee0b2 |
580 | gv_init(gv, stash, name, len, add & 2); |
a0d0e21e |
581 | gv_init_sv(gv, sv_type); |
9607fc9c |
582 | GvFLAGS(gv) |= add_gvflags; |
93a17b20 |
583 | |
584 | /* set up magic where warranted */ |
585 | switch (*name) { |
a0d0e21e |
586 | case 'A': |
587 | if (strEQ(name, "ARGV")) { |
588 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
589 | } |
590 | break; |
591 | |
ed6116ce |
592 | case 'a': |
593 | case 'b': |
594 | if (len == 1) |
a5f75d66 |
595 | GvMULTI_on(gv); |
ed6116ce |
596 | break; |
a0d0e21e |
597 | case 'E': |
598 | if (strnEQ(name, "EXPORT", 6)) |
a5f75d66 |
599 | GvMULTI_on(gv); |
a0d0e21e |
600 | break; |
463ee0b2 |
601 | case 'I': |
602 | if (strEQ(name, "ISA")) { |
603 | AV* av = GvAVn(gv); |
a5f75d66 |
604 | GvMULTI_on(gv); |
a0d0e21e |
605 | sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0); |
606 | if (add & 2 && strEQ(nambeg,"AnyDBM_File::ISA") && AvFILL(av) == -1) |
85e6fe83 |
607 | { |
a0d0e21e |
608 | char *pname; |
609 | av_push(av, newSVpv(pname = "NDBM_File",0)); |
dc437b57 |
610 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e |
611 | av_push(av, newSVpv(pname = "DB_File",0)); |
dc437b57 |
612 | gv_stashpvn(pname, 7, TRUE); |
a0d0e21e |
613 | av_push(av, newSVpv(pname = "GDBM_File",0)); |
dc437b57 |
614 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e |
615 | av_push(av, newSVpv(pname = "SDBM_File",0)); |
dc437b57 |
616 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e |
617 | av_push(av, newSVpv(pname = "ODBM_File",0)); |
dc437b57 |
618 | gv_stashpvn(pname, 9, TRUE); |
85e6fe83 |
619 | } |
463ee0b2 |
620 | } |
621 | break; |
a0d0e21e |
622 | #ifdef OVERLOAD |
623 | case 'O': |
624 | if (strEQ(name, "OVERLOAD")) { |
625 | HV* hv = GvHVn(gv); |
a5f75d66 |
626 | GvMULTI_on(gv); |
a0d0e21e |
627 | sv_magic((SV*)hv, (SV*)gv, 'A', 0, 0); |
628 | } |
629 | break; |
630 | #endif /* OVERLOAD */ |
93a17b20 |
631 | case 'S': |
632 | if (strEQ(name, "SIG")) { |
633 | HV *hv; |
dc437b57 |
634 | I32 i; |
93a17b20 |
635 | siggv = gv; |
a5f75d66 |
636 | GvMULTI_on(siggv); |
93a17b20 |
637 | hv = GvHVn(siggv); |
638 | hv_magic(hv, siggv, 'S'); |
dc437b57 |
639 | for(i=1;sig_name[i];i++) { |
640 | SV ** init; |
641 | init=hv_fetch(hv,sig_name[i],strlen(sig_name[i]),1); |
642 | if(init) |
643 | sv_setsv(*init,&sv_undef); |
644 | psig_ptr[i] = 0; |
645 | psig_name[i] = 0; |
646 | } |
93a17b20 |
647 | /* initialize signal stack */ |
648 | signalstack = newAV(); |
93a17b20 |
649 | AvREAL_off(signalstack); |
a0d0e21e |
650 | av_extend(signalstack, 30); |
651 | av_fill(signalstack, 0); |
93a17b20 |
652 | } |
653 | break; |
654 | |
655 | case '&': |
463ee0b2 |
656 | if (len > 1) |
657 | break; |
93a17b20 |
658 | ampergv = gv; |
659 | sawampersand = TRUE; |
a0d0e21e |
660 | goto ro_magicalize; |
93a17b20 |
661 | |
662 | case '`': |
463ee0b2 |
663 | if (len > 1) |
664 | break; |
93a17b20 |
665 | leftgv = gv; |
666 | sawampersand = TRUE; |
a0d0e21e |
667 | goto ro_magicalize; |
93a17b20 |
668 | |
669 | case '\'': |
463ee0b2 |
670 | if (len > 1) |
671 | break; |
93a17b20 |
672 | rightgv = gv; |
673 | sawampersand = TRUE; |
a0d0e21e |
674 | goto ro_magicalize; |
93a17b20 |
675 | |
676 | case ':': |
463ee0b2 |
677 | if (len > 1) |
678 | break; |
93a17b20 |
679 | sv_setpv(GvSV(gv),chopset); |
680 | goto magicalize; |
681 | |
ff0cee69 |
682 | case '?': |
683 | if (len > 1) |
684 | break; |
685 | #ifdef COMPLEX_STATUS |
686 | sv_upgrade(GvSV(gv), SVt_PVLV); |
687 | #endif |
688 | goto magicalize; |
689 | |
93a17b20 |
690 | case '#': |
a0d0e21e |
691 | case '*': |
692 | if (dowarn && len == 1 && sv_type == SVt_PV) |
693 | warn("Use of $%s is deprecated", name); |
694 | /* FALL THROUGH */ |
695 | case '[': |
696 | case '!': |
93a17b20 |
697 | case '^': |
698 | case '~': |
699 | case '=': |
700 | case '-': |
701 | case '%': |
702 | case '.': |
93a17b20 |
703 | case '(': |
704 | case ')': |
705 | case '<': |
706 | case '>': |
707 | case ',': |
708 | case '\\': |
709 | case '/': |
93a17b20 |
710 | case '|': |
748a9306 |
711 | case '\001': |
93a17b20 |
712 | case '\004': |
ad8898e0 |
713 | case '\005': |
748a9306 |
714 | case '\006': |
a0d0e21e |
715 | case '\010': |
ad8898e0 |
716 | case '\017': |
93a17b20 |
717 | case '\t': |
718 | case '\020': |
719 | case '\024': |
720 | case '\027': |
463ee0b2 |
721 | if (len > 1) |
722 | break; |
723 | goto magicalize; |
724 | |
a0d0e21e |
725 | case '+': |
463ee0b2 |
726 | case '1': |
727 | case '2': |
728 | case '3': |
729 | case '4': |
730 | case '5': |
731 | case '6': |
732 | case '7': |
733 | case '8': |
734 | case '9': |
a0d0e21e |
735 | ro_magicalize: |
736 | SvREADONLY_on(GvSV(gv)); |
93a17b20 |
737 | magicalize: |
463ee0b2 |
738 | sv_magic(GvSV(gv), (SV*)gv, 0, name, len); |
93a17b20 |
739 | break; |
740 | |
741 | case '\014': |
463ee0b2 |
742 | if (len > 1) |
743 | break; |
93a17b20 |
744 | sv_setpv(GvSV(gv),"\f"); |
745 | formfeed = GvSV(gv); |
746 | break; |
747 | case ';': |
463ee0b2 |
748 | if (len > 1) |
749 | break; |
93a17b20 |
750 | sv_setpv(GvSV(gv),"\034"); |
751 | break; |
463ee0b2 |
752 | case ']': |
753 | if (len == 1) { |
f86702cc |
754 | SV *sv = GvSV(gv); |
93a17b20 |
755 | sv_upgrade(sv, SVt_PVNV); |
a0d0e21e |
756 | sv_setpv(sv, patchlevel); |
f86702cc |
757 | (void)sv_2nv(sv); |
758 | SvREADONLY_on(sv); |
93a17b20 |
759 | } |
760 | break; |
79072805 |
761 | } |
93a17b20 |
762 | return gv; |
79072805 |
763 | } |
764 | |
765 | void |
f6aff53a |
766 | gv_fullname3(sv, gv, prefix) |
79072805 |
767 | SV *sv; |
768 | GV *gv; |
f967eb5f |
769 | char *prefix; |
79072805 |
770 | { |
771 | HV *hv = GvSTASH(gv); |
f967eb5f |
772 | if (!hv) { |
773 | SvOK_off(sv); |
79072805 |
774 | return; |
f967eb5f |
775 | } |
776 | sv_setpv(sv, prefix ? prefix : ""); |
79072805 |
777 | sv_catpv(sv,HvNAME(hv)); |
463ee0b2 |
778 | sv_catpvn(sv,"::", 2); |
79072805 |
779 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
780 | } |
781 | |
782 | void |
f6aff53a |
783 | gv_efullname3(sv, gv, prefix) |
79072805 |
784 | SV *sv; |
785 | GV *gv; |
f967eb5f |
786 | char *prefix; |
79072805 |
787 | { |
f967eb5f |
788 | GV *egv = GvEGV(gv); |
748a9306 |
789 | if (!egv) |
790 | egv = gv; |
f6aff53a |
791 | gv_fullname3(sv, egv, prefix); |
792 | } |
793 | |
794 | /* XXX compatibility with versions <= 5.003. */ |
795 | void |
796 | gv_fullname(sv,gv) |
797 | SV *sv; |
798 | GV *gv; |
799 | { |
800 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
801 | } |
802 | |
803 | /* XXX compatibility with versions <= 5.003. */ |
804 | void |
805 | gv_efullname(sv,gv) |
806 | SV *sv; |
807 | GV *gv; |
808 | { |
809 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
79072805 |
810 | } |
811 | |
812 | IO * |
813 | newIO() |
814 | { |
815 | IO *io; |
8990e307 |
816 | GV *iogv; |
817 | |
818 | io = (IO*)NEWSV(0,0); |
a0d0e21e |
819 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 |
820 | SvREFCNT(io) = 1; |
821 | SvOBJECT_on(io); |
dc437b57 |
822 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
8990e307 |
823 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 |
824 | return io; |
825 | } |
826 | |
827 | void |
463ee0b2 |
828 | gv_check(stash) |
829 | HV* stash; |
79072805 |
830 | { |
831 | register HE *entry; |
832 | register I32 i; |
833 | register GV *gv; |
463ee0b2 |
834 | HV *hv; |
a0d0e21e |
835 | GV *filegv; |
463ee0b2 |
836 | |
8990e307 |
837 | if (!HvARRAY(stash)) |
838 | return; |
a0d0e21e |
839 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
dc437b57 |
840 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
841 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
842 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv)) |
a0d0e21e |
843 | { |
844 | if (hv != defstash) |
845 | gv_check(hv); /* nested package */ |
846 | } |
dc437b57 |
847 | else if (isALPHA(*HeKEY(entry))) { |
848 | gv = (GV*)HeVAL(entry); |
a5f75d66 |
849 | if (GvMULTI(gv)) |
463ee0b2 |
850 | continue; |
851 | curcop->cop_line = GvLINE(gv); |
a0d0e21e |
852 | filegv = GvFILEGV(gv); |
853 | curcop->cop_filegv = filegv; |
a5f75d66 |
854 | if (filegv && GvMULTI(filegv)) /* Filename began with slash */ |
8990e307 |
855 | continue; |
dc437b57 |
856 | warn("Name \"%s::%s\" used only once: possible typo", |
a0d0e21e |
857 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 |
858 | } |
79072805 |
859 | } |
860 | } |
861 | } |
862 | |
863 | GV * |
a0d0e21e |
864 | newGVgen(pack) |
865 | char *pack; |
79072805 |
866 | { |
a0d0e21e |
867 | (void)sprintf(tokenbuf,"%s::_GEN_%ld",pack,(long)gensym++); |
85e6fe83 |
868 | return gv_fetchpv(tokenbuf,TRUE, SVt_PVGV); |
79072805 |
869 | } |
870 | |
871 | /* hopefully this is only called on local symbol table entries */ |
872 | |
873 | GP* |
874 | gp_ref(gp) |
875 | GP* gp; |
876 | { |
877 | gp->gp_refcnt++; |
44a8e56a |
878 | if (gp->gp_cv) { |
879 | if (gp->gp_cvgen) { |
880 | /* multi-named GPs cannot be used for method cache */ |
881 | SvREFCNT_dec(gp->gp_cv); |
882 | gp->gp_cv = Nullcv; |
883 | gp->gp_cvgen = 0; |
884 | } |
885 | else { |
886 | /* Adding a new name to a subroutine invalidates method cache */ |
887 | sub_generation++; |
888 | } |
889 | } |
79072805 |
890 | return gp; |
79072805 |
891 | } |
892 | |
893 | void |
894 | gp_free(gv) |
895 | GV* gv; |
896 | { |
79072805 |
897 | GP* gp; |
377b8fbc |
898 | CV* cv; |
79072805 |
899 | |
900 | if (!gv || !(gp = GvGP(gv))) |
901 | return; |
902 | if (gp->gp_refcnt == 0) { |
903 | warn("Attempt to free unreferenced glob pointers"); |
904 | return; |
905 | } |
44a8e56a |
906 | if (gp->gp_cv) { |
907 | /* Deleting the name of a subroutine invalidates method cache */ |
908 | sub_generation++; |
909 | } |
748a9306 |
910 | if (--gp->gp_refcnt > 0) { |
911 | if (gp->gp_egv == gv) |
912 | gp->gp_egv = 0; |
79072805 |
913 | return; |
748a9306 |
914 | } |
79072805 |
915 | |
8990e307 |
916 | SvREFCNT_dec(gp->gp_sv); |
917 | SvREFCNT_dec(gp->gp_av); |
918 | SvREFCNT_dec(gp->gp_hv); |
377b8fbc |
919 | SvREFCNT_dec(gp->gp_io); |
a6006777 |
920 | SvREFCNT_dec(gp->gp_cv); |
748a9306 |
921 | SvREFCNT_dec(gp->gp_form); |
922 | |
79072805 |
923 | Safefree(gp); |
924 | GvGP(gv) = 0; |
925 | } |
926 | |
927 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) |
928 | #define MICROPORT |
929 | #endif |
930 | |
931 | #ifdef MICROPORT /* Microport 2.4 hack */ |
932 | AV *GvAVn(gv) |
933 | register GV *gv; |
934 | { |
935 | if (GvGP(gv)->gp_av) |
936 | return GvGP(gv)->gp_av; |
937 | else |
938 | return GvGP(gv_AVadd(gv))->gp_av; |
939 | } |
940 | |
941 | HV *GvHVn(gv) |
942 | register GV *gv; |
943 | { |
944 | if (GvGP(gv)->gp_hv) |
945 | return GvGP(gv)->gp_hv; |
946 | else |
947 | return GvGP(gv_HVadd(gv))->gp_hv; |
948 | } |
949 | #endif /* Microport 2.4 hack */ |
a0d0e21e |
950 | |
951 | #ifdef OVERLOAD |
952 | /* Updates and caches the CV's */ |
953 | |
954 | bool |
955 | Gv_AMupdate(stash) |
956 | HV* stash; |
957 | { |
958 | GV** gvp; |
959 | HV* hv; |
960 | GV* gv; |
961 | CV* cv; |
962 | MAGIC* mg=mg_find((SV*)stash,'c'); |
748a9306 |
963 | AMT *amtp=mg ? (AMT*)mg->mg_ptr: NULL; |
a6006777 |
964 | AMT amt; |
a0d0e21e |
965 | |
e7ea3e70 |
966 | if (mg && amtp->was_ok_am == amagic_generation |
967 | && amtp->was_ok_sub == sub_generation) |
a6006777 |
968 | return AMT_AMAGIC(amtp); |
969 | if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */ |
748a9306 |
970 | int i; |
a6006777 |
971 | for (i=1; i<NofAMmeth; i++) { |
748a9306 |
972 | if (amtp->table[i]) { |
973 | SvREFCNT_dec(amtp->table[i]); |
974 | } |
975 | } |
976 | } |
a0d0e21e |
977 | sv_unmagic((SV*)stash, 'c'); |
978 | |
979 | DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) ); |
980 | |
a6006777 |
981 | amt.was_ok_am = amagic_generation; |
982 | amt.was_ok_sub = sub_generation; |
983 | amt.fallback = AMGfallNO; |
984 | amt.flags = 0; |
985 | |
986 | #ifdef OVERLOAD_VIA_HASH |
987 | gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */ |
a0d0e21e |
988 | if (gvp && ((gv = *gvp) != (GV*)&sv_undef && (hv = GvHV(gv)))) { |
989 | int filled=0; |
990 | int i; |
991 | char *cp; |
a0d0e21e |
992 | SV* sv; |
993 | SV** svp; |
a0d0e21e |
994 | |
995 | /* Work with "fallback" key, which we assume to be first in AMG_names */ |
996 | |
a6006777 |
997 | if (( cp = (char *)AMG_names[0] ) && |
998 | (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) { |
a0d0e21e |
999 | if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1000 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
1001 | } |
a6006777 |
1002 | for (i = 1; i < NofAMmeth; i++) { |
1003 | cv = 0; |
1004 | cp = (char *)AMG_names[i]; |
1005 | |
1006 | svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE); |
dc437b57 |
1007 | if (svp && ((sv = *svp) != &sv_undef)) { |
a0d0e21e |
1008 | switch (SvTYPE(sv)) { |
1009 | default: |
1010 | if (!SvROK(sv)) { |
1011 | if (!SvOK(sv)) break; |
748a9306 |
1012 | gv = gv_fetchmethod(stash, SvPV(sv, na)); |
a0d0e21e |
1013 | if (gv) cv = GvCV(gv); |
1014 | break; |
1015 | } |
1016 | cv = (CV*)SvRV(sv); |
1017 | if (SvTYPE(cv) == SVt_PVCV) |
1018 | break; |
1019 | /* FALL THROUGH */ |
1020 | case SVt_PVHV: |
1021 | case SVt_PVAV: |
a6006777 |
1022 | croak("Not a subroutine reference in overload table"); |
a0d0e21e |
1023 | return FALSE; |
1024 | case SVt_PVCV: |
8ebc5c01 |
1025 | cv = (CV*)sv; |
1026 | break; |
a0d0e21e |
1027 | case SVt_PVGV: |
8ebc5c01 |
1028 | if (!(cv = GvCVu((GV*)sv))) |
1029 | cv = sv_2cv(sv, &stash, &gv, TRUE); |
1030 | break; |
a0d0e21e |
1031 | } |
1032 | if (cv) filled=1; |
1033 | else { |
a6006777 |
1034 | croak("Method for operation %s not found in package %.256s during blessing\n", |
a0d0e21e |
1035 | cp,HvNAME(stash)); |
1036 | return FALSE; |
1037 | } |
1038 | } |
a6006777 |
1039 | #else |
1040 | { |
1041 | int filled = 0; |
1042 | int i; |
9607fc9c |
1043 | const char *cp; |
a6006777 |
1044 | SV* sv = NULL; |
1045 | SV** svp; |
1046 | |
1047 | /* Work with "fallback" key, which we assume to be first in AMG_names */ |
1048 | |
9607fc9c |
1049 | if ( cp = AMG_names[0] ) { |
a6006777 |
1050 | /* Try to find via inheritance. */ |
774d564b |
1051 | gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */ |
a6006777 |
1052 | if (gv) sv = GvSV(gv); |
1053 | |
774d564b |
1054 | if (!gv) goto no_table; |
a6006777 |
1055 | else if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1056 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
1057 | } |
1058 | |
1059 | for (i = 1; i < NofAMmeth; i++) { |
1060 | cv = 0; |
9607fc9c |
1061 | cp = AMG_names[i]; |
a6006777 |
1062 | |
774d564b |
1063 | *buf = '('; /* A cookie: "(". */ |
a6006777 |
1064 | strcpy(buf + 1, cp); |
44a8e56a |
1065 | DEBUG_o( deb("Checking overloading of `%s' in package `%.256s'\n", |
1066 | cp, HvNAME(stash)) ); |
1067 | gv = gv_fetchmeth(stash, buf, strlen(buf), -1); /* no filling stash! */ |
1068 | if(gv && (cv = GvCV(gv))) { |
1069 | char *name = buf; |
1070 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
1071 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { |
1072 | /* GvSV contains the name of the method. */ |
1073 | GV *ngv; |
1074 | |
1075 | DEBUG_o( deb("Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", |
1076 | SvPV(GvSV(gv), na), cp, HvNAME(stash)) ); |
dc848c6f |
1077 | if (!SvPOK(GvSV(gv)) |
1078 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), |
1079 | FALSE))) |
1080 | { |
44a8e56a |
1081 | /* Can be an import stub (created by `can'). */ |
1082 | if (GvCVGEN(gv)) { |
1083 | croak("Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", |
1084 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1085 | cp, HvNAME(stash)); |
1086 | } else |
1087 | croak("Cannot resolve method `%.256s' overloading `%s' in package `%.256s'", |
1088 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1089 | cp, HvNAME(stash)); |
1090 | } |
dc848c6f |
1091 | name = SvPVX(GvSV(gv)); |
1092 | cv = GvCV(gv = ngv); |
44a8e56a |
1093 | } |
1094 | DEBUG_o( deb("Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", |
1095 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), |
1096 | GvNAME(CvGV(cv))) ); |
1097 | filled = 1; |
1098 | } |
a6006777 |
1099 | #endif |
1100 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e |
1101 | } |
a0d0e21e |
1102 | if (filled) { |
a6006777 |
1103 | AMT_AMAGIC_on(&amt); |
1104 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT)); |
a0d0e21e |
1105 | return TRUE; |
1106 | } |
1107 | } |
a6006777 |
1108 | /* Here we have no table: */ |
774d564b |
1109 | no_table: |
a6006777 |
1110 | AMT_AMAGIC_off(&amt); |
1111 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1112 | return FALSE; |
1113 | } |
1114 | |
1115 | /* During call to this subroutine stack can be reallocated. It is |
1116 | * advised to call SPAGAIN macro in your code after call */ |
1117 | |
1118 | SV* |
1119 | amagic_call(left,right,method,flags) |
1120 | SV* left; |
1121 | SV* right; |
1122 | int method; |
1123 | int flags; |
1124 | { |
1125 | MAGIC *mg; |
1126 | CV *cv; |
1127 | CV **cvp=NULL, **ocvp=NULL; |
1128 | AMT *amtp, *oamtp; |
1129 | int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; |
748a9306 |
1130 | int postpr=0, inc_dec_ass=0, assignshift=assign?1:0; |
a0d0e21e |
1131 | HV* stash; |
1132 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
1133 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c')) |
a6006777 |
1134 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1135 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
1136 | : NULL)) |
748a9306 |
1137 | && ((cv = cvp[off=method+assignshift]) |
1138 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1139 | * usual method */ |
1140 | (fl = 1, cv = cvp[off=method])))) { |
a0d0e21e |
1141 | lr = -1; /* Call method for left argument */ |
1142 | } else { |
1143 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1144 | int logic; |
1145 | |
1146 | /* look for substituted methods */ |
1147 | switch (method) { |
1148 | case inc_amg: |
748a9306 |
1149 | if (((cv = cvp[off=add_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e |
1150 | || ((cv = cvp[off=add_amg]) && (postpr=1))) { |
1151 | right = &sv_yes; lr = -1; assign = 1; |
1152 | } |
1153 | break; |
1154 | case dec_amg: |
748a9306 |
1155 | if (((cv = cvp[off=subtr_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e |
1156 | || ((cv = cvp[off=subtr_amg]) && (postpr=1))) { |
1157 | right = &sv_yes; lr = -1; assign = 1; |
1158 | } |
1159 | break; |
1160 | case bool__amg: |
1161 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1162 | break; |
1163 | case numer_amg: |
1164 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1165 | break; |
1166 | case string_amg: |
1167 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1168 | break; |
dc437b57 |
1169 | case not_amg: |
1170 | (void)((cv = cvp[off=bool__amg]) |
1171 | || (cv = cvp[off=numer_amg]) |
1172 | || (cv = cvp[off=string_amg])); |
1173 | postpr = 1; |
1174 | break; |
748a9306 |
1175 | case copy_amg: |
1176 | { |
1177 | SV* ref=SvRV(left); |
1178 | if (!SvROK(ref) && SvTYPE(ref) <= SVt_PVMG) { /* Just to be |
1179 | * extra |
1180 | * causious, |
1181 | * maybe in some |
1182 | * additional |
1183 | * cases sv_setsv |
1184 | * is safe too */ |
1185 | SV* newref = newSVsv(ref); |
1186 | SvOBJECT_on(newref); |
1187 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(ref)); |
1188 | return newref; |
1189 | } |
1190 | } |
1191 | break; |
a0d0e21e |
1192 | case abs_amg: |
748a9306 |
1193 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1194 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 |
1195 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1196 | if (off1==lt_amg) { |
748a9306 |
1197 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1198 | lt_amg,AMGf_noright); |
1199 | logic = SvTRUE(lessp); |
1200 | } else { |
748a9306 |
1201 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1202 | ncmp_amg,AMGf_noright); |
1203 | logic = (SvNV(lessp) < 0); |
1204 | } |
1205 | if (logic) { |
1206 | if (off==subtr_amg) { |
1207 | right = left; |
748a9306 |
1208 | left = nullsv; |
a0d0e21e |
1209 | lr = 1; |
1210 | } |
1211 | } else { |
1212 | return left; |
1213 | } |
1214 | } |
1215 | break; |
1216 | case neg_amg: |
1217 | if (cv = cvp[off=subtr_amg]) { |
1218 | right = left; |
1219 | left = sv_2mortal(newSViv(0)); |
1220 | lr = 1; |
1221 | } |
1222 | break; |
1223 | default: |
1224 | goto not_found; |
1225 | } |
1226 | if (!cv) goto not_found; |
1227 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
1228 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c')) |
a6006777 |
1229 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1230 | ? (amtp = (AMT*)mg->mg_ptr)->table |
1231 | : NULL)) |
a0d0e21e |
1232 | && (cv = cvp[off=method])) { /* Method for right |
1233 | * argument found */ |
1234 | lr=1; |
748a9306 |
1235 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
4633a7c4 |
1236 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1237 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1238 | && !(flags & AMGf_unary)) { |
1239 | /* We look for substitution for |
1240 | * comparison operations and |
1241 | * concatendation */ |
1242 | if (method==concat_amg || method==concat_ass_amg |
1243 | || method==repeat_amg || method==repeat_ass_amg) { |
1244 | return NULL; /* Delegate operation to string conversion */ |
1245 | } |
1246 | off = -1; |
1247 | switch (method) { |
1248 | case lt_amg: |
1249 | case le_amg: |
1250 | case gt_amg: |
1251 | case ge_amg: |
1252 | case eq_amg: |
1253 | case ne_amg: |
1254 | postpr = 1; off=ncmp_amg; break; |
1255 | case slt_amg: |
1256 | case sle_amg: |
1257 | case sgt_amg: |
1258 | case sge_amg: |
1259 | case seq_amg: |
1260 | case sne_amg: |
1261 | postpr = 1; off=scmp_amg; break; |
1262 | } |
1263 | if (off != -1) cv = cvp[off]; |
1264 | if (!cv) { |
1265 | goto not_found; |
1266 | } |
1267 | } else { |
a6006777 |
1268 | not_found: /* No method found, either report or croak */ |
a0d0e21e |
1269 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1270 | notfound = 1; lr = -1; |
1271 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1272 | notfound = 1; lr = 1; |
1273 | } else { |
774d564b |
1274 | if (off==-1) off=method; |
1275 | sprintf(buf, |
1276 | "Operation `%s': no method found,%sargument %s%.256s%s%.256s", |
a6006777 |
1277 | AMG_names[method + assignshift], |
e7ea3e70 |
1278 | (flags & AMGf_unary ? " " : "\n\tleft "), |
a0d0e21e |
1279 | SvAMAGIC(left)? |
1280 | "in overloaded package ": |
1281 | "has no overloaded magic", |
1282 | SvAMAGIC(left)? |
1283 | HvNAME(SvSTASH(SvRV(left))): |
1284 | "", |
1285 | SvAMAGIC(right)? |
e7ea3e70 |
1286 | ",\n\tright argument in overloaded package ": |
1287 | (flags & AMGf_unary |
1288 | ? "" |
1289 | : ",\n\tright argument has no overloaded magic"), |
a0d0e21e |
1290 | SvAMAGIC(right)? |
1291 | HvNAME(SvSTASH(SvRV(right))): |
1292 | ""); |
1293 | if (amtp && amtp->fallback >= AMGfallYES) { |
06b43eb7 |
1294 | DEBUG_o( deb(buf) ); |
a0d0e21e |
1295 | } else { |
a6006777 |
1296 | croak(buf); |
a0d0e21e |
1297 | } |
1298 | return NULL; |
1299 | } |
1300 | } |
1301 | } |
1302 | if (!notfound) { |
774d564b |
1303 | DEBUG_o( deb( |
1304 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %.256s%s\n", |
a6006777 |
1305 | AMG_names[off], |
748a9306 |
1306 | method+assignshift==off? "" : |
1307 | " (initially `", |
1308 | method+assignshift==off? "" : |
a6006777 |
1309 | AMG_names[method+assignshift], |
748a9306 |
1310 | method+assignshift==off? "" : "')", |
1311 | flags & AMGf_unary? "" : |
1312 | lr==1 ? " for right argument": " for left argument", |
1313 | flags & AMGf_unary? " for argument" : "", |
a0d0e21e |
1314 | HvNAME(stash), |
1315 | fl? ",\n\tassignment variant used": "") ); |
748a9306 |
1316 | /* Since we use shallow copy during assignment, we need |
1317 | * to dublicate the contents, probably calling user-supplied |
1318 | * version of copy operator |
1319 | */ |
c07a80fd |
1320 | if ((method + assignshift==off |
748a9306 |
1321 | && (assign || method==inc_amg || method==dec_amg)) |
1322 | || inc_dec_ass) RvDEEPCP(left); |
a0d0e21e |
1323 | } |
1324 | { |
1325 | dSP; |
1326 | BINOP myop; |
1327 | SV* res; |
54310121 |
1328 | bool oldcatch = CATCH_GET; |
a0d0e21e |
1329 | |
54310121 |
1330 | CATCH_SET(TRUE); |
a0d0e21e |
1331 | Zero(&myop, 1, BINOP); |
1332 | myop.op_last = (OP *) &myop; |
1333 | myop.op_next = Nullop; |
54310121 |
1334 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1335 | |
1336 | ENTER; |
1337 | SAVESPTR(op); |
1338 | op = (OP *) &myop; |
dc437b57 |
1339 | if (perldb && curstash != debstash) |
1340 | op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1341 | PUTBACK; |
1342 | pp_pushmark(); |
1343 | |
1344 | EXTEND(sp, notfound + 5); |
1345 | PUSHs(lr>0? right: left); |
1346 | PUSHs(lr>0? left: right); |
5167a5b1 |
1347 | PUSHs( lr > 0 ? &sv_yes : ( assign ? &sv_undef : &sv_no )); |
a0d0e21e |
1348 | if (notfound) { |
a6006777 |
1349 | PUSHs( sv_2mortal(newSVpv((char *)AMG_names[method + assignshift],0)) ); |
a0d0e21e |
1350 | } |
1351 | PUSHs((SV*)cv); |
1352 | PUTBACK; |
1353 | |
1354 | if (op = pp_entersub()) |
ad8898e0 |
1355 | runops(); |
a0d0e21e |
1356 | LEAVE; |
1357 | SPAGAIN; |
1358 | |
1359 | res=POPs; |
1360 | PUTBACK; |
54310121 |
1361 | CATCH_SET(oldcatch); |
a0d0e21e |
1362 | |
a0d0e21e |
1363 | if (postpr) { |
1364 | int ans; |
1365 | switch (method) { |
1366 | case le_amg: |
1367 | case sle_amg: |
1368 | ans=SvIV(res)<=0; break; |
1369 | case lt_amg: |
1370 | case slt_amg: |
1371 | ans=SvIV(res)<0; break; |
1372 | case ge_amg: |
1373 | case sge_amg: |
1374 | ans=SvIV(res)>=0; break; |
1375 | case gt_amg: |
1376 | case sgt_amg: |
1377 | ans=SvIV(res)>0; break; |
1378 | case eq_amg: |
1379 | case seq_amg: |
1380 | ans=SvIV(res)==0; break; |
1381 | case ne_amg: |
1382 | case sne_amg: |
1383 | ans=SvIV(res)!=0; break; |
1384 | case inc_amg: |
1385 | case dec_amg: |
bbce6d69 |
1386 | SvSetSV(left,res); return left; |
dc437b57 |
1387 | case not_amg: |
44a8e56a |
1388 | ans=!SvOK(res); break; |
a0d0e21e |
1389 | } |
54310121 |
1390 | return boolSV(ans); |
748a9306 |
1391 | } else if (method==copy_amg) { |
1392 | if (!SvROK(res)) { |
a6006777 |
1393 | croak("Copy method did not return a reference"); |
748a9306 |
1394 | } |
1395 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1396 | } else { |
1397 | return res; |
1398 | } |
1399 | } |
1400 | } |
1401 | #endif /* OVERLOAD */ |