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