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 * |
8ac85365 |
25 | gv_AVadd(register GV *gv) |
79072805 |
26 | { |
a0d0e21e |
27 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
28 | croak("Bad symbol for array"); |
79072805 |
29 | if (!GvAV(gv)) |
30 | GvAV(gv) = newAV(); |
31 | return gv; |
32 | } |
33 | |
34 | GV * |
8ac85365 |
35 | gv_HVadd(register GV *gv) |
79072805 |
36 | { |
a0d0e21e |
37 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
38 | croak("Bad symbol for hash"); |
79072805 |
39 | if (!GvHV(gv)) |
463ee0b2 |
40 | GvHV(gv) = newHV(); |
79072805 |
41 | return gv; |
42 | } |
43 | |
44 | GV * |
8ac85365 |
45 | gv_IOadd(register GV *gv) |
a0d0e21e |
46 | { |
47 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
48 | croak("Bad symbol for filehandle"); |
49 | if (!GvIOp(gv)) |
50 | GvIOp(gv) = newIO(); |
51 | return gv; |
52 | } |
53 | |
54 | GV * |
8ac85365 |
55 | gv_fetchfile(char *name) |
79072805 |
56 | { |
e858de61 |
57 | dTHR; |
53d95988 |
58 | char smallbuf[256]; |
59 | char *tmpbuf; |
8ebc5c01 |
60 | STRLEN tmplen; |
79072805 |
61 | GV *gv; |
62 | |
53d95988 |
63 | tmplen = strlen(name) + 2; |
64 | if (tmplen < sizeof smallbuf) |
65 | tmpbuf = smallbuf; |
66 | else |
67 | New(603, tmpbuf, tmplen + 1, char); |
68 | tmpbuf[0] = '_'; |
69 | tmpbuf[1] = '<'; |
70 | strcpy(tmpbuf + 2, name); |
8ebc5c01 |
71 | gv = *(GV**)hv_fetch(defstash, tmpbuf, tmplen, TRUE); |
72 | if (!isGV(gv)) |
73 | gv_init(gv, defstash, tmpbuf, tmplen, FALSE); |
53d95988 |
74 | if (tmpbuf != smallbuf) |
75 | Safefree(tmpbuf); |
79072805 |
76 | sv_setpv(GvSV(gv), name); |
8ebc5c01 |
77 | if (*name == '/' && (instr(name, "/lib/") || instr(name, ".pm"))) |
a5f75d66 |
78 | GvMULTI_on(gv); |
84902520 |
79 | if (PERLDB_LINE) |
93a17b20 |
80 | hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L'); |
79072805 |
81 | return gv; |
82 | } |
83 | |
463ee0b2 |
84 | void |
8ac85365 |
85 | gv_init(GV *gv, HV *stash, char *name, STRLEN len, int multi) |
463ee0b2 |
86 | { |
0f15f207 |
87 | dTHR; |
463ee0b2 |
88 | register GP *gp; |
89 | |
dc437b57 |
90 | sv_upgrade((SV*)gv, SVt_PVGV); |
463ee0b2 |
91 | if (SvLEN(gv)) |
92 | Safefree(SvPVX(gv)); |
44a8e56a |
93 | Newz(602, gp, 1, GP); |
8990e307 |
94 | GvGP(gv) = gp_ref(gp); |
463ee0b2 |
95 | GvSV(gv) = NEWSV(72,0); |
96 | GvLINE(gv) = curcop->cop_line; |
8990e307 |
97 | GvFILEGV(gv) = curcop->cop_filegv; |
463ee0b2 |
98 | GvEGV(gv) = gv; |
99 | sv_magic((SV*)gv, (SV*)gv, '*', name, len); |
100 | GvSTASH(gv) = stash; |
a0d0e21e |
101 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 |
102 | GvNAMELEN(gv) = len; |
103 | if (multi) |
a5f75d66 |
104 | GvMULTI_on(gv); |
463ee0b2 |
105 | } |
106 | |
a0d0e21e |
107 | static void |
8ac85365 |
108 | gv_init_sv(GV *gv, I32 sv_type) |
a0d0e21e |
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 * |
8ac85365 |
124 | gv_fetchmeth(HV *stash, char *name, STRLEN len, I32 level) |
79072805 |
125 | { |
126 | AV* av; |
463ee0b2 |
127 | GV* topgv; |
79072805 |
128 | GV* gv; |
463ee0b2 |
129 | GV** gvp; |
748a9306 |
130 | CV* cv; |
a0d0e21e |
131 | |
132 | if (!stash) |
133 | return 0; |
44a8e56a |
134 | if ((level > 100) || (level < -100)) |
a0d0e21e |
135 | croak("Recursive inheritance detected"); |
463ee0b2 |
136 | |
463ee0b2 |
137 | DEBUG_o( deb("Looking for method %s in package %s\n",name,HvNAME(stash)) ); |
44a8e56a |
138 | |
139 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
140 | if (!gvp) |
141 | topgv = Nullgv; |
142 | else { |
143 | topgv = *gvp; |
144 | if (SvTYPE(topgv) != SVt_PVGV) |
145 | gv_init(topgv, stash, name, len, TRUE); |
146 | if (cv = GvCV(topgv)) { |
147 | /* If genuine method or valid cache entry, use it */ |
148 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) >= sub_generation) |
7a4c00b4 |
149 | return topgv; |
44a8e56a |
150 | /* Stale cached entry: junk it */ |
151 | SvREFCNT_dec(cv); |
152 | GvCV(topgv) = cv = Nullcv; |
153 | GvCVGEN(topgv) = 0; |
748a9306 |
154 | } |
463ee0b2 |
155 | } |
79072805 |
156 | |
9607fc9c |
157 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
158 | av = (gvp && (gv = *gvp) && gv != (GV*)&sv_undef) ? GvAV(gv) : Nullav; |
159 | |
fb73857a |
160 | /* create and re-create @.*::SUPER::ISA on demand */ |
161 | if (!av || !SvMAGIC(av)) { |
9607fc9c |
162 | char* packname = HvNAME(stash); |
163 | STRLEN packlen = strlen(packname); |
164 | |
165 | if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) { |
166 | HV* basestash; |
167 | |
168 | packlen -= 7; |
169 | basestash = gv_stashpvn(packname, packlen, TRUE); |
170 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); |
171 | if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) { |
e858de61 |
172 | dTHR; /* just for SvREFCNT_dec */ |
9607fc9c |
173 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
174 | if (!gvp || !(gv = *gvp)) |
175 | croak("Cannot create %s::ISA", HvNAME(stash)); |
176 | if (SvTYPE(gv) != SVt_PVGV) |
177 | gv_init(gv, stash, "ISA", 3, TRUE); |
178 | SvREFCNT_dec(GvAV(gv)); |
179 | GvAV(gv) = (AV*)SvREFCNT_inc(av); |
180 | } |
181 | } |
182 | } |
183 | |
184 | if (av) { |
79072805 |
185 | SV** svp = AvARRAY(av); |
186 | I32 items = AvFILL(av) + 1; |
187 | while (items--) { |
79072805 |
188 | SV* sv = *svp++; |
a0d0e21e |
189 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 |
190 | if (!basestash) { |
79072805 |
191 | if (dowarn) |
a0d0e21e |
192 | warn("Can't locate package %s for @%s::ISA", |
463ee0b2 |
193 | SvPVX(sv), HvNAME(stash)); |
79072805 |
194 | continue; |
195 | } |
44a8e56a |
196 | gv = gv_fetchmeth(basestash, name, len, |
197 | (level >= 0) ? level + 1 : level - 1); |
198 | if (gv) |
199 | goto gotcha; |
79072805 |
200 | } |
201 | } |
a0d0e21e |
202 | |
9607fc9c |
203 | /* if at top level, try UNIVERSAL */ |
204 | |
44a8e56a |
205 | if (level == 0 || level == -1) { |
9607fc9c |
206 | HV* lastchance; |
207 | |
dc437b57 |
208 | if (lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE)) { |
44a8e56a |
209 | if (gv = gv_fetchmeth(lastchance, name, len, |
210 | (level >= 0) ? level + 1 : level - 1)) { |
211 | gotcha: |
dc848c6f |
212 | /* |
213 | * Cache method in topgv if: |
214 | * 1. topgv has no synonyms (else inheritance crosses wires) |
215 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
216 | */ |
217 | if (topgv && |
218 | GvREFCNT(topgv) == 1 && |
219 | (cv = GvCV(gv)) && |
220 | (CvROOT(cv) || CvXSUB(cv))) |
221 | { |
44a8e56a |
222 | if (cv = GvCV(topgv)) |
223 | SvREFCNT_dec(cv); |
224 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
225 | GvCVGEN(topgv) = sub_generation; |
226 | } |
a0d0e21e |
227 | return gv; |
228 | } |
229 | } |
230 | } |
231 | |
79072805 |
232 | return 0; |
233 | } |
234 | |
235 | GV * |
8ac85365 |
236 | gv_fetchmethod(HV *stash, char *name) |
463ee0b2 |
237 | { |
dc848c6f |
238 | return gv_fetchmethod_autoload(stash, name, TRUE); |
239 | } |
240 | |
241 | GV * |
8ac85365 |
242 | gv_fetchmethod_autoload(HV *stash, char *name, I32 autoload) |
dc848c6f |
243 | { |
0f15f207 |
244 | dTHR; |
463ee0b2 |
245 | register char *nend; |
a0d0e21e |
246 | char *nsplit = 0; |
247 | GV* gv; |
463ee0b2 |
248 | |
249 | for (nend = name; *nend; nend++) { |
9607fc9c |
250 | if (*nend == '\'') |
a0d0e21e |
251 | nsplit = nend; |
9607fc9c |
252 | else if (*nend == ':' && *(nend + 1) == ':') |
253 | nsplit = ++nend; |
a0d0e21e |
254 | } |
255 | if (nsplit) { |
a0d0e21e |
256 | char *origname = name; |
257 | name = nsplit + 1; |
a0d0e21e |
258 | if (*nsplit == ':') |
259 | --nsplit; |
9607fc9c |
260 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
261 | /* ->SUPER::method should really be looked up in original stash */ |
fc36a67e |
262 | SV *tmpstr = sv_2mortal(newSVpvf("%s::SUPER", |
263 | HvNAME(curcop->cop_stash))); |
9607fc9c |
264 | stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); |
265 | DEBUG_o( deb("Treating %s as %s::%s\n", |
266 | origname, HvNAME(stash), name) ); |
4633a7c4 |
267 | } |
9607fc9c |
268 | else |
269 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); |
4633a7c4 |
270 | } |
271 | |
9607fc9c |
272 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
273 | if (!gv) { |
702887b4 |
274 | if (strEQ(name,"import")) |
dc437b57 |
275 | gv = (GV*)&sv_yes; |
dc848c6f |
276 | else if (autoload) |
54310121 |
277 | gv = gv_autoload4(stash, name, nend - name, TRUE); |
463ee0b2 |
278 | } |
dc848c6f |
279 | else if (autoload) { |
280 | CV* cv = GvCV(gv); |
09280a33 |
281 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
282 | GV* stubgv; |
283 | GV* autogv; |
284 | |
285 | if (CvANON(cv)) |
286 | stubgv = gv; |
287 | else { |
288 | stubgv = CvGV(cv); |
289 | if (GvCV(stubgv) != cv) /* orphaned import */ |
290 | stubgv = gv; |
291 | } |
292 | autogv = gv_autoload4(GvSTASH(stubgv), |
293 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
294 | if (autogv) |
295 | gv = autogv; |
296 | } |
297 | } |
44a8e56a |
298 | |
299 | return gv; |
300 | } |
301 | |
302 | GV* |
8ac85365 |
303 | gv_autoload4(HV *stash, char *name, STRLEN len, 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* |
8ac85365 |
346 | gv_stashpv(char *name, I32 create) |
a0d0e21e |
347 | { |
dc437b57 |
348 | return gv_stashpvn(name, strlen(name), create); |
349 | } |
350 | |
351 | HV* |
8ac85365 |
352 | gv_stashpvn(char *name, U32 namelen, I32 create) |
dc437b57 |
353 | { |
46fc3d4c |
354 | char smallbuf[256]; |
355 | char *tmpbuf; |
a0d0e21e |
356 | HV *stash; |
357 | GV *tmpgv; |
dc437b57 |
358 | |
46fc3d4c |
359 | if (namelen + 3 < sizeof smallbuf) |
360 | tmpbuf = smallbuf; |
361 | else |
362 | New(606, tmpbuf, namelen + 3, char); |
dc437b57 |
363 | Copy(name,tmpbuf,namelen,char); |
364 | tmpbuf[namelen++] = ':'; |
365 | tmpbuf[namelen++] = ':'; |
366 | tmpbuf[namelen] = '\0'; |
46fc3d4c |
367 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
368 | if (tmpbuf != smallbuf) |
369 | Safefree(tmpbuf); |
a0d0e21e |
370 | if (!tmpgv) |
371 | return 0; |
372 | if (!GvHV(tmpgv)) |
373 | GvHV(tmpgv) = newHV(); |
374 | stash = GvHV(tmpgv); |
375 | if (!HvNAME(stash)) |
376 | HvNAME(stash) = savepv(name); |
377 | return stash; |
463ee0b2 |
378 | } |
379 | |
a0d0e21e |
380 | HV* |
8ac85365 |
381 | gv_stashsv(SV *sv, I32 create) |
a0d0e21e |
382 | { |
dc437b57 |
383 | register char *ptr; |
384 | STRLEN len; |
385 | ptr = SvPV(sv,len); |
386 | return gv_stashpvn(ptr, len, create); |
a0d0e21e |
387 | } |
388 | |
389 | |
463ee0b2 |
390 | GV * |
8ac85365 |
391 | gv_fetchpv(char *nambeg, I32 add, I32 sv_type) |
79072805 |
392 | { |
11343788 |
393 | dTHR; |
463ee0b2 |
394 | register char *name = nambeg; |
395 | register GV *gv = 0; |
79072805 |
396 | GV**gvp; |
79072805 |
397 | I32 len; |
398 | register char *namend; |
463ee0b2 |
399 | HV *stash = 0; |
9607fc9c |
400 | U32 add_gvflags = 0; |
85e6fe83 |
401 | char *tmpbuf; |
79072805 |
402 | |
c07a80fd |
403 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
404 | name++; |
405 | |
79072805 |
406 | for (namend = name; *namend; namend++) { |
463ee0b2 |
407 | if ((*namend == '\'' && namend[1]) || |
408 | (*namend == ':' && namend[1] == ':')) |
409 | { |
463ee0b2 |
410 | if (!stash) |
411 | stash = defstash; |
dc437b57 |
412 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e |
413 | return Nullgv; |
463ee0b2 |
414 | |
85e6fe83 |
415 | len = namend - name; |
416 | if (len > 0) { |
a0d0e21e |
417 | New(601, tmpbuf, len+3, char); |
418 | Copy(name, tmpbuf, len, char); |
419 | tmpbuf[len++] = ':'; |
420 | tmpbuf[len++] = ':'; |
421 | tmpbuf[len] = '\0'; |
463ee0b2 |
422 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
85e6fe83 |
423 | Safefree(tmpbuf); |
463ee0b2 |
424 | if (!gvp || *gvp == (GV*)&sv_undef) |
425 | return Nullgv; |
426 | gv = *gvp; |
85e6fe83 |
427 | |
463ee0b2 |
428 | if (SvTYPE(gv) == SVt_PVGV) |
a5f75d66 |
429 | GvMULTI_on(gv); |
a0d0e21e |
430 | else if (!add) |
431 | return Nullgv; |
463ee0b2 |
432 | else |
433 | gv_init(gv, stash, nambeg, namend - nambeg, (add & 2)); |
85e6fe83 |
434 | |
463ee0b2 |
435 | if (!(stash = GvHV(gv))) |
436 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
437 | |
463ee0b2 |
438 | if (!HvNAME(stash)) |
a0d0e21e |
439 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 |
440 | } |
441 | |
442 | if (*namend == ':') |
443 | namend++; |
444 | namend++; |
445 | name = namend; |
446 | if (!*name) |
dc437b57 |
447 | return gv ? gv : (GV*)*hv_fetch(defstash, "main::", 6, TRUE); |
79072805 |
448 | } |
79072805 |
449 | } |
a0d0e21e |
450 | len = namend - name; |
451 | if (!len) |
452 | len = 1; |
463ee0b2 |
453 | |
454 | /* No stash in name, so see how we can default */ |
455 | |
456 | if (!stash) { |
457 | if (isIDFIRST(*name)) { |
9607fc9c |
458 | bool global = FALSE; |
459 | |
463ee0b2 |
460 | if (isUPPER(*name)) { |
461 | if (*name > 'I') { |
462 | if (*name == 'S' && ( |
463 | strEQ(name, "SIG") || |
464 | strEQ(name, "STDIN") || |
465 | strEQ(name, "STDOUT") || |
466 | strEQ(name, "STDERR") )) |
467 | global = TRUE; |
468 | } |
469 | else if (*name > 'E') { |
470 | if (*name == 'I' && strEQ(name, "INC")) |
471 | global = TRUE; |
472 | } |
473 | else if (*name > 'A') { |
474 | if (*name == 'E' && strEQ(name, "ENV")) |
475 | global = TRUE; |
476 | } |
477 | else if (*name == 'A' && ( |
478 | strEQ(name, "ARGV") || |
479 | strEQ(name, "ARGVOUT") )) |
480 | global = TRUE; |
481 | } |
482 | else if (*name == '_' && !name[1]) |
483 | global = TRUE; |
9607fc9c |
484 | |
463ee0b2 |
485 | if (global) |
486 | stash = defstash; |
85e6fe83 |
487 | else if ((COP*)curcop == &compiling) { |
a0d0e21e |
488 | stash = curstash; |
748a9306 |
489 | if (add && (hints & HINT_STRICT_VARS) && |
490 | sv_type != SVt_PVCV && |
491 | sv_type != SVt_PVGV && |
4633a7c4 |
492 | sv_type != SVt_PVFM && |
c07a80fd |
493 | sv_type != SVt_PVIO && |
377b8fbc |
494 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
748a9306 |
495 | { |
4633a7c4 |
496 | gvp = (GV**)hv_fetch(stash,name,len,0); |
497 | if (!gvp || |
a5f75d66 |
498 | *gvp == (GV*)&sv_undef || |
499 | SvTYPE(*gvp) != SVt_PVGV) |
500 | { |
4633a7c4 |
501 | stash = 0; |
a5f75d66 |
502 | } |
503 | else if (sv_type == SVt_PV && !GvIMPORTED_SV(*gvp) || |
504 | sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp) || |
505 | sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp) ) |
4633a7c4 |
506 | { |
a5f75d66 |
507 | warn("Variable \"%c%s\" is not imported", |
4633a7c4 |
508 | sv_type == SVt_PVAV ? '@' : |
509 | sv_type == SVt_PVHV ? '%' : '$', |
510 | name); |
8ebc5c01 |
511 | if (GvCVu(*gvp)) |
4633a7c4 |
512 | warn("(Did you mean &%s instead?)\n", name); |
a0d0e21e |
513 | stash = 0; |
4633a7c4 |
514 | } |
a0d0e21e |
515 | } |
85e6fe83 |
516 | } |
463ee0b2 |
517 | else |
518 | stash = curcop->cop_stash; |
519 | } |
520 | else |
521 | stash = defstash; |
522 | } |
523 | |
524 | /* By this point we should have a stash and a name */ |
525 | |
a0d0e21e |
526 | if (!stash) { |
527 | if (add) { |
528 | warn("Global symbol \"%s\" requires explicit package name", name); |
529 | ++error_count; |
530 | stash = curstash ? curstash : defstash; /* avoid core dumps */ |
9607fc9c |
531 | add_gvflags = ((sv_type == SVt_PV) ? GVf_IMPORTED_SV |
532 | : (sv_type == SVt_PVAV) ? GVf_IMPORTED_AV |
533 | : (sv_type == SVt_PVHV) ? GVf_IMPORTED_HV |
534 | : 0); |
a0d0e21e |
535 | } |
536 | else |
537 | return Nullgv; |
538 | } |
539 | |
540 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
541 | return Nullgv; |
542 | |
79072805 |
543 | gvp = (GV**)hv_fetch(stash,name,len,add); |
544 | if (!gvp || *gvp == (GV*)&sv_undef) |
545 | return Nullgv; |
546 | gv = *gvp; |
547 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
548 | if (add) { |
a5f75d66 |
549 | GvMULTI_on(gv); |
a0d0e21e |
550 | gv_init_sv(gv, sv_type); |
551 | } |
79072805 |
552 | return gv; |
553 | } |
93a17b20 |
554 | |
555 | /* Adding a new symbol */ |
556 | |
a0d0e21e |
557 | if (add & 4) |
558 | warn("Had to create %s unexpectedly", nambeg); |
463ee0b2 |
559 | gv_init(gv, stash, name, len, add & 2); |
a0d0e21e |
560 | gv_init_sv(gv, sv_type); |
9607fc9c |
561 | GvFLAGS(gv) |= add_gvflags; |
93a17b20 |
562 | |
563 | /* set up magic where warranted */ |
564 | switch (*name) { |
a0d0e21e |
565 | case 'A': |
566 | if (strEQ(name, "ARGV")) { |
567 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
568 | } |
569 | break; |
570 | |
ed6116ce |
571 | case 'a': |
572 | case 'b': |
573 | if (len == 1) |
a5f75d66 |
574 | GvMULTI_on(gv); |
ed6116ce |
575 | break; |
a0d0e21e |
576 | case 'E': |
577 | if (strnEQ(name, "EXPORT", 6)) |
a5f75d66 |
578 | GvMULTI_on(gv); |
a0d0e21e |
579 | break; |
463ee0b2 |
580 | case 'I': |
581 | if (strEQ(name, "ISA")) { |
582 | AV* av = GvAVn(gv); |
a5f75d66 |
583 | GvMULTI_on(gv); |
a0d0e21e |
584 | sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0); |
585 | if (add & 2 && strEQ(nambeg,"AnyDBM_File::ISA") && AvFILL(av) == -1) |
85e6fe83 |
586 | { |
a0d0e21e |
587 | char *pname; |
588 | av_push(av, newSVpv(pname = "NDBM_File",0)); |
dc437b57 |
589 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e |
590 | av_push(av, newSVpv(pname = "DB_File",0)); |
dc437b57 |
591 | gv_stashpvn(pname, 7, TRUE); |
a0d0e21e |
592 | av_push(av, newSVpv(pname = "GDBM_File",0)); |
dc437b57 |
593 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e |
594 | av_push(av, newSVpv(pname = "SDBM_File",0)); |
dc437b57 |
595 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e |
596 | av_push(av, newSVpv(pname = "ODBM_File",0)); |
dc437b57 |
597 | gv_stashpvn(pname, 9, TRUE); |
85e6fe83 |
598 | } |
463ee0b2 |
599 | } |
600 | break; |
a0d0e21e |
601 | #ifdef OVERLOAD |
602 | case 'O': |
603 | if (strEQ(name, "OVERLOAD")) { |
604 | HV* hv = GvHVn(gv); |
a5f75d66 |
605 | GvMULTI_on(gv); |
ea0efc06 |
606 | hv_magic(hv, gv, 'A'); |
a0d0e21e |
607 | } |
608 | break; |
609 | #endif /* OVERLOAD */ |
93a17b20 |
610 | case 'S': |
611 | if (strEQ(name, "SIG")) { |
612 | HV *hv; |
dc437b57 |
613 | I32 i; |
93a17b20 |
614 | siggv = gv; |
a5f75d66 |
615 | GvMULTI_on(siggv); |
93a17b20 |
616 | hv = GvHVn(siggv); |
617 | hv_magic(hv, siggv, 'S'); |
dc437b57 |
618 | for(i=1;sig_name[i];i++) { |
619 | SV ** init; |
620 | init=hv_fetch(hv,sig_name[i],strlen(sig_name[i]),1); |
621 | if(init) |
622 | sv_setsv(*init,&sv_undef); |
623 | psig_ptr[i] = 0; |
624 | psig_name[i] = 0; |
625 | } |
93a17b20 |
626 | /* initialize signal stack */ |
627 | signalstack = newAV(); |
93a17b20 |
628 | AvREAL_off(signalstack); |
a0d0e21e |
629 | av_extend(signalstack, 30); |
630 | av_fill(signalstack, 0); |
93a17b20 |
631 | } |
632 | break; |
633 | |
634 | case '&': |
463ee0b2 |
635 | if (len > 1) |
636 | break; |
93a17b20 |
637 | ampergv = gv; |
638 | sawampersand = TRUE; |
a0d0e21e |
639 | goto ro_magicalize; |
93a17b20 |
640 | |
641 | case '`': |
463ee0b2 |
642 | if (len > 1) |
643 | break; |
93a17b20 |
644 | leftgv = gv; |
645 | sawampersand = TRUE; |
a0d0e21e |
646 | goto ro_magicalize; |
93a17b20 |
647 | |
648 | case '\'': |
463ee0b2 |
649 | if (len > 1) |
650 | break; |
93a17b20 |
651 | rightgv = gv; |
652 | sawampersand = TRUE; |
a0d0e21e |
653 | goto ro_magicalize; |
93a17b20 |
654 | |
655 | case ':': |
463ee0b2 |
656 | if (len > 1) |
657 | break; |
93a17b20 |
658 | sv_setpv(GvSV(gv),chopset); |
659 | goto magicalize; |
660 | |
ff0cee69 |
661 | case '?': |
662 | if (len > 1) |
663 | break; |
664 | #ifdef COMPLEX_STATUS |
665 | sv_upgrade(GvSV(gv), SVt_PVLV); |
666 | #endif |
667 | goto magicalize; |
668 | |
93a17b20 |
669 | case '#': |
a0d0e21e |
670 | case '*': |
671 | if (dowarn && len == 1 && sv_type == SVt_PV) |
672 | warn("Use of $%s is deprecated", name); |
673 | /* FALL THROUGH */ |
674 | case '[': |
675 | case '!': |
93a17b20 |
676 | case '^': |
677 | case '~': |
678 | case '=': |
679 | case '-': |
680 | case '%': |
681 | case '.': |
93a17b20 |
682 | case '(': |
683 | case ')': |
684 | case '<': |
685 | case '>': |
686 | case ',': |
687 | case '\\': |
688 | case '/': |
93a17b20 |
689 | case '|': |
748a9306 |
690 | case '\001': |
93a17b20 |
691 | case '\004': |
ad8898e0 |
692 | case '\005': |
748a9306 |
693 | case '\006': |
a0d0e21e |
694 | case '\010': |
ad8898e0 |
695 | case '\017': |
93a17b20 |
696 | case '\t': |
697 | case '\020': |
698 | case '\024': |
699 | case '\027': |
463ee0b2 |
700 | if (len > 1) |
701 | break; |
702 | goto magicalize; |
703 | |
a0d0e21e |
704 | case '+': |
463ee0b2 |
705 | case '1': |
706 | case '2': |
707 | case '3': |
708 | case '4': |
709 | case '5': |
710 | case '6': |
711 | case '7': |
712 | case '8': |
713 | case '9': |
fb73857a |
714 | case '\023': |
a0d0e21e |
715 | ro_magicalize: |
716 | SvREADONLY_on(GvSV(gv)); |
93a17b20 |
717 | magicalize: |
463ee0b2 |
718 | sv_magic(GvSV(gv), (SV*)gv, 0, name, len); |
93a17b20 |
719 | break; |
720 | |
721 | case '\014': |
463ee0b2 |
722 | if (len > 1) |
723 | break; |
93a17b20 |
724 | sv_setpv(GvSV(gv),"\f"); |
725 | formfeed = GvSV(gv); |
726 | break; |
727 | case ';': |
463ee0b2 |
728 | if (len > 1) |
729 | break; |
93a17b20 |
730 | sv_setpv(GvSV(gv),"\034"); |
731 | break; |
463ee0b2 |
732 | case ']': |
733 | if (len == 1) { |
f86702cc |
734 | SV *sv = GvSV(gv); |
93a17b20 |
735 | sv_upgrade(sv, SVt_PVNV); |
a0d0e21e |
736 | sv_setpv(sv, patchlevel); |
f86702cc |
737 | (void)sv_2nv(sv); |
738 | SvREADONLY_on(sv); |
93a17b20 |
739 | } |
740 | break; |
79072805 |
741 | } |
93a17b20 |
742 | return gv; |
79072805 |
743 | } |
744 | |
745 | void |
8ac85365 |
746 | gv_fullname3(SV *sv, GV *gv, char *prefix) |
79072805 |
747 | { |
748 | HV *hv = GvSTASH(gv); |
f967eb5f |
749 | if (!hv) { |
750 | SvOK_off(sv); |
79072805 |
751 | return; |
f967eb5f |
752 | } |
753 | sv_setpv(sv, prefix ? prefix : ""); |
79072805 |
754 | sv_catpv(sv,HvNAME(hv)); |
463ee0b2 |
755 | sv_catpvn(sv,"::", 2); |
79072805 |
756 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
757 | } |
758 | |
759 | void |
8ac85365 |
760 | gv_efullname3(SV *sv, GV *gv, char *prefix) |
79072805 |
761 | { |
f967eb5f |
762 | GV *egv = GvEGV(gv); |
748a9306 |
763 | if (!egv) |
764 | egv = gv; |
f6aff53a |
765 | gv_fullname3(sv, egv, prefix); |
766 | } |
767 | |
768 | /* XXX compatibility with versions <= 5.003. */ |
769 | void |
8ac85365 |
770 | gv_fullname(SV *sv, GV *gv) |
f6aff53a |
771 | { |
772 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
773 | } |
774 | |
775 | /* XXX compatibility with versions <= 5.003. */ |
776 | void |
8ac85365 |
777 | gv_efullname(SV *sv, GV *gv) |
f6aff53a |
778 | { |
779 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
79072805 |
780 | } |
781 | |
782 | IO * |
8ac85365 |
783 | newIO(void) |
79072805 |
784 | { |
11343788 |
785 | dTHR; |
79072805 |
786 | IO *io; |
8990e307 |
787 | GV *iogv; |
788 | |
789 | io = (IO*)NEWSV(0,0); |
a0d0e21e |
790 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 |
791 | SvREFCNT(io) = 1; |
792 | SvOBJECT_on(io); |
c9de509e |
793 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
794 | if (!iogv) |
795 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
8990e307 |
796 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 |
797 | return io; |
798 | } |
799 | |
800 | void |
8ac85365 |
801 | gv_check(HV *stash) |
79072805 |
802 | { |
11343788 |
803 | dTHR; |
79072805 |
804 | register HE *entry; |
805 | register I32 i; |
806 | register GV *gv; |
463ee0b2 |
807 | HV *hv; |
a0d0e21e |
808 | GV *filegv; |
463ee0b2 |
809 | |
8990e307 |
810 | if (!HvARRAY(stash)) |
811 | return; |
a0d0e21e |
812 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
dc437b57 |
813 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
814 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
815 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv)) |
a0d0e21e |
816 | { |
817 | if (hv != defstash) |
818 | gv_check(hv); /* nested package */ |
819 | } |
dc437b57 |
820 | else if (isALPHA(*HeKEY(entry))) { |
821 | gv = (GV*)HeVAL(entry); |
a5f75d66 |
822 | if (GvMULTI(gv)) |
463ee0b2 |
823 | continue; |
824 | curcop->cop_line = GvLINE(gv); |
a0d0e21e |
825 | filegv = GvFILEGV(gv); |
826 | curcop->cop_filegv = filegv; |
a5f75d66 |
827 | if (filegv && GvMULTI(filegv)) /* Filename began with slash */ |
8990e307 |
828 | continue; |
dc437b57 |
829 | warn("Name \"%s::%s\" used only once: possible typo", |
a0d0e21e |
830 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 |
831 | } |
79072805 |
832 | } |
833 | } |
834 | } |
835 | |
836 | GV * |
8ac85365 |
837 | newGVgen(char *pack) |
79072805 |
838 | { |
46fc3d4c |
839 | return gv_fetchpv(form("%s::_GEN_%ld", pack, (long)gensym++), |
840 | TRUE, SVt_PVGV); |
79072805 |
841 | } |
842 | |
843 | /* hopefully this is only called on local symbol table entries */ |
844 | |
845 | GP* |
8ac85365 |
846 | gp_ref(GP *gp) |
79072805 |
847 | { |
848 | gp->gp_refcnt++; |
44a8e56a |
849 | if (gp->gp_cv) { |
850 | if (gp->gp_cvgen) { |
851 | /* multi-named GPs cannot be used for method cache */ |
852 | SvREFCNT_dec(gp->gp_cv); |
853 | gp->gp_cv = Nullcv; |
854 | gp->gp_cvgen = 0; |
855 | } |
856 | else { |
857 | /* Adding a new name to a subroutine invalidates method cache */ |
858 | sub_generation++; |
859 | } |
860 | } |
79072805 |
861 | return gp; |
79072805 |
862 | } |
863 | |
864 | void |
8ac85365 |
865 | gp_free(GV *gv) |
79072805 |
866 | { |
79072805 |
867 | GP* gp; |
377b8fbc |
868 | CV* cv; |
79072805 |
869 | |
870 | if (!gv || !(gp = GvGP(gv))) |
871 | return; |
872 | if (gp->gp_refcnt == 0) { |
873 | warn("Attempt to free unreferenced glob pointers"); |
874 | return; |
875 | } |
44a8e56a |
876 | if (gp->gp_cv) { |
877 | /* Deleting the name of a subroutine invalidates method cache */ |
878 | sub_generation++; |
879 | } |
748a9306 |
880 | if (--gp->gp_refcnt > 0) { |
881 | if (gp->gp_egv == gv) |
882 | gp->gp_egv = 0; |
79072805 |
883 | return; |
748a9306 |
884 | } |
79072805 |
885 | |
8990e307 |
886 | SvREFCNT_dec(gp->gp_sv); |
887 | SvREFCNT_dec(gp->gp_av); |
888 | SvREFCNT_dec(gp->gp_hv); |
377b8fbc |
889 | SvREFCNT_dec(gp->gp_io); |
a6006777 |
890 | SvREFCNT_dec(gp->gp_cv); |
748a9306 |
891 | SvREFCNT_dec(gp->gp_form); |
892 | |
79072805 |
893 | Safefree(gp); |
894 | GvGP(gv) = 0; |
895 | } |
896 | |
897 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) |
898 | #define MICROPORT |
899 | #endif |
900 | |
901 | #ifdef MICROPORT /* Microport 2.4 hack */ |
902 | AV *GvAVn(gv) |
903 | register GV *gv; |
904 | { |
905 | if (GvGP(gv)->gp_av) |
906 | return GvGP(gv)->gp_av; |
907 | else |
908 | return GvGP(gv_AVadd(gv))->gp_av; |
909 | } |
910 | |
911 | HV *GvHVn(gv) |
912 | register GV *gv; |
913 | { |
914 | if (GvGP(gv)->gp_hv) |
915 | return GvGP(gv)->gp_hv; |
916 | else |
917 | return GvGP(gv_HVadd(gv))->gp_hv; |
918 | } |
919 | #endif /* Microport 2.4 hack */ |
a0d0e21e |
920 | |
921 | #ifdef OVERLOAD |
922 | /* Updates and caches the CV's */ |
923 | |
924 | bool |
8ac85365 |
925 | Gv_AMupdate(HV *stash) |
a0d0e21e |
926 | { |
11343788 |
927 | dTHR; |
a0d0e21e |
928 | GV** gvp; |
929 | HV* hv; |
930 | GV* gv; |
931 | CV* cv; |
932 | MAGIC* mg=mg_find((SV*)stash,'c'); |
8ac85365 |
933 | AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
a6006777 |
934 | AMT amt; |
a0d0e21e |
935 | |
e7ea3e70 |
936 | if (mg && amtp->was_ok_am == amagic_generation |
937 | && amtp->was_ok_sub == sub_generation) |
a6006777 |
938 | return AMT_AMAGIC(amtp); |
939 | if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */ |
748a9306 |
940 | int i; |
a6006777 |
941 | for (i=1; i<NofAMmeth; i++) { |
748a9306 |
942 | if (amtp->table[i]) { |
943 | SvREFCNT_dec(amtp->table[i]); |
944 | } |
945 | } |
946 | } |
a0d0e21e |
947 | sv_unmagic((SV*)stash, 'c'); |
948 | |
949 | DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) ); |
950 | |
a6006777 |
951 | amt.was_ok_am = amagic_generation; |
952 | amt.was_ok_sub = sub_generation; |
953 | amt.fallback = AMGfallNO; |
954 | amt.flags = 0; |
955 | |
956 | #ifdef OVERLOAD_VIA_HASH |
957 | gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */ |
a0d0e21e |
958 | if (gvp && ((gv = *gvp) != (GV*)&sv_undef && (hv = GvHV(gv)))) { |
959 | int filled=0; |
960 | int i; |
961 | char *cp; |
a0d0e21e |
962 | SV* sv; |
963 | SV** svp; |
a0d0e21e |
964 | |
965 | /* Work with "fallback" key, which we assume to be first in AMG_names */ |
966 | |
a6006777 |
967 | if (( cp = (char *)AMG_names[0] ) && |
968 | (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) { |
a0d0e21e |
969 | if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
970 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
971 | } |
a6006777 |
972 | for (i = 1; i < NofAMmeth; i++) { |
973 | cv = 0; |
974 | cp = (char *)AMG_names[i]; |
975 | |
976 | svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE); |
dc437b57 |
977 | if (svp && ((sv = *svp) != &sv_undef)) { |
a0d0e21e |
978 | switch (SvTYPE(sv)) { |
979 | default: |
980 | if (!SvROK(sv)) { |
981 | if (!SvOK(sv)) break; |
748a9306 |
982 | gv = gv_fetchmethod(stash, SvPV(sv, na)); |
a0d0e21e |
983 | if (gv) cv = GvCV(gv); |
984 | break; |
985 | } |
986 | cv = (CV*)SvRV(sv); |
987 | if (SvTYPE(cv) == SVt_PVCV) |
988 | break; |
989 | /* FALL THROUGH */ |
990 | case SVt_PVHV: |
991 | case SVt_PVAV: |
a6006777 |
992 | croak("Not a subroutine reference in overload table"); |
a0d0e21e |
993 | return FALSE; |
994 | case SVt_PVCV: |
8ebc5c01 |
995 | cv = (CV*)sv; |
996 | break; |
a0d0e21e |
997 | case SVt_PVGV: |
8ebc5c01 |
998 | if (!(cv = GvCVu((GV*)sv))) |
999 | cv = sv_2cv(sv, &stash, &gv, TRUE); |
1000 | break; |
a0d0e21e |
1001 | } |
1002 | if (cv) filled=1; |
1003 | else { |
a6006777 |
1004 | croak("Method for operation %s not found in package %.256s during blessing\n", |
a0d0e21e |
1005 | cp,HvNAME(stash)); |
1006 | return FALSE; |
1007 | } |
1008 | } |
a6006777 |
1009 | #else |
1010 | { |
1011 | int filled = 0; |
1012 | int i; |
9607fc9c |
1013 | const char *cp; |
a6006777 |
1014 | SV* sv = NULL; |
1015 | SV** svp; |
1016 | |
1017 | /* Work with "fallback" key, which we assume to be first in AMG_names */ |
1018 | |
9607fc9c |
1019 | if ( cp = AMG_names[0] ) { |
a6006777 |
1020 | /* Try to find via inheritance. */ |
774d564b |
1021 | gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */ |
a6006777 |
1022 | if (gv) sv = GvSV(gv); |
1023 | |
774d564b |
1024 | if (!gv) goto no_table; |
a6006777 |
1025 | else if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1026 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
1027 | } |
1028 | |
1029 | for (i = 1; i < NofAMmeth; i++) { |
46fc3d4c |
1030 | SV *cookie = sv_2mortal(newSVpvf("(%s", cp = AMG_names[i])); |
44a8e56a |
1031 | DEBUG_o( deb("Checking overloading of `%s' in package `%.256s'\n", |
1032 | cp, HvNAME(stash)) ); |
46fc3d4c |
1033 | /* don't fill the cache while looking up! */ |
1034 | gv = gv_fetchmeth(stash, SvPVX(cookie), SvCUR(cookie), -1); |
1035 | cv = 0; |
44a8e56a |
1036 | if(gv && (cv = GvCV(gv))) { |
44a8e56a |
1037 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
1038 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { |
1039 | /* GvSV contains the name of the method. */ |
1040 | GV *ngv; |
1041 | |
1042 | DEBUG_o( deb("Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", |
1043 | SvPV(GvSV(gv), na), cp, HvNAME(stash)) ); |
dc848c6f |
1044 | if (!SvPOK(GvSV(gv)) |
1045 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), |
1046 | FALSE))) |
1047 | { |
44a8e56a |
1048 | /* Can be an import stub (created by `can'). */ |
1049 | if (GvCVGEN(gv)) { |
1050 | croak("Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", |
1051 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1052 | cp, HvNAME(stash)); |
1053 | } else |
1054 | croak("Cannot resolve method `%.256s' overloading `%s' in package `%.256s'", |
1055 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1056 | cp, HvNAME(stash)); |
1057 | } |
dc848c6f |
1058 | cv = GvCV(gv = ngv); |
44a8e56a |
1059 | } |
1060 | DEBUG_o( deb("Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", |
1061 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), |
1062 | GvNAME(CvGV(cv))) ); |
1063 | filled = 1; |
1064 | } |
a6006777 |
1065 | #endif |
1066 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e |
1067 | } |
a0d0e21e |
1068 | if (filled) { |
a6006777 |
1069 | AMT_AMAGIC_on(&amt); |
1070 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT)); |
a0d0e21e |
1071 | return TRUE; |
1072 | } |
1073 | } |
a6006777 |
1074 | /* Here we have no table: */ |
774d564b |
1075 | no_table: |
a6006777 |
1076 | AMT_AMAGIC_off(&amt); |
1077 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1078 | return FALSE; |
1079 | } |
1080 | |
1081 | /* During call to this subroutine stack can be reallocated. It is |
1082 | * advised to call SPAGAIN macro in your code after call */ |
1083 | |
1084 | SV* |
8ac85365 |
1085 | amagic_call(SV *left, SV *right, int method, int flags) |
a0d0e21e |
1086 | { |
11343788 |
1087 | dTHR; |
a0d0e21e |
1088 | MAGIC *mg; |
1089 | CV *cv; |
1090 | CV **cvp=NULL, **ocvp=NULL; |
1091 | AMT *amtp, *oamtp; |
1092 | int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; |
748a9306 |
1093 | int postpr=0, inc_dec_ass=0, assignshift=assign?1:0; |
a0d0e21e |
1094 | HV* stash; |
1095 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
1096 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c')) |
a6006777 |
1097 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1098 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1099 | : (CV **) NULL)) |
748a9306 |
1100 | && ((cv = cvp[off=method+assignshift]) |
1101 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1102 | * usual method */ |
1103 | (fl = 1, cv = cvp[off=method])))) { |
a0d0e21e |
1104 | lr = -1; /* Call method for left argument */ |
1105 | } else { |
1106 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1107 | int logic; |
1108 | |
1109 | /* look for substituted methods */ |
1110 | switch (method) { |
1111 | case inc_amg: |
748a9306 |
1112 | if (((cv = cvp[off=add_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e |
1113 | || ((cv = cvp[off=add_amg]) && (postpr=1))) { |
1114 | right = &sv_yes; lr = -1; assign = 1; |
1115 | } |
1116 | break; |
1117 | case dec_amg: |
748a9306 |
1118 | if (((cv = cvp[off=subtr_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e |
1119 | || ((cv = cvp[off=subtr_amg]) && (postpr=1))) { |
1120 | right = &sv_yes; lr = -1; assign = 1; |
1121 | } |
1122 | break; |
1123 | case bool__amg: |
1124 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1125 | break; |
1126 | case numer_amg: |
1127 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1128 | break; |
1129 | case string_amg: |
1130 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1131 | break; |
dc437b57 |
1132 | case not_amg: |
1133 | (void)((cv = cvp[off=bool__amg]) |
1134 | || (cv = cvp[off=numer_amg]) |
1135 | || (cv = cvp[off=string_amg])); |
1136 | postpr = 1; |
1137 | break; |
748a9306 |
1138 | case copy_amg: |
1139 | { |
1140 | SV* ref=SvRV(left); |
fc36a67e |
1141 | if (!SvROK(ref) && SvTYPE(ref) <= SVt_PVMG) { |
1142 | /* |
1143 | * Just to be extra cautious. Maybe in some |
1144 | * additional cases sv_setsv is safe, too. |
1145 | */ |
748a9306 |
1146 | SV* newref = newSVsv(ref); |
1147 | SvOBJECT_on(newref); |
1148 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(ref)); |
1149 | return newref; |
1150 | } |
1151 | } |
1152 | break; |
a0d0e21e |
1153 | case abs_amg: |
748a9306 |
1154 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1155 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 |
1156 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1157 | if (off1==lt_amg) { |
748a9306 |
1158 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1159 | lt_amg,AMGf_noright); |
1160 | logic = SvTRUE(lessp); |
1161 | } else { |
748a9306 |
1162 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1163 | ncmp_amg,AMGf_noright); |
1164 | logic = (SvNV(lessp) < 0); |
1165 | } |
1166 | if (logic) { |
1167 | if (off==subtr_amg) { |
1168 | right = left; |
748a9306 |
1169 | left = nullsv; |
a0d0e21e |
1170 | lr = 1; |
1171 | } |
1172 | } else { |
1173 | return left; |
1174 | } |
1175 | } |
1176 | break; |
1177 | case neg_amg: |
1178 | if (cv = cvp[off=subtr_amg]) { |
1179 | right = left; |
1180 | left = sv_2mortal(newSViv(0)); |
1181 | lr = 1; |
1182 | } |
1183 | break; |
1184 | default: |
1185 | goto not_found; |
1186 | } |
1187 | if (!cv) goto not_found; |
1188 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
1189 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c')) |
a6006777 |
1190 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1191 | ? (amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1192 | : (CV **) NULL)) |
a0d0e21e |
1193 | && (cv = cvp[off=method])) { /* Method for right |
1194 | * argument found */ |
1195 | lr=1; |
748a9306 |
1196 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
4633a7c4 |
1197 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1198 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1199 | && !(flags & AMGf_unary)) { |
1200 | /* We look for substitution for |
1201 | * comparison operations and |
fc36a67e |
1202 | * concatenation */ |
a0d0e21e |
1203 | if (method==concat_amg || method==concat_ass_amg |
1204 | || method==repeat_amg || method==repeat_ass_amg) { |
1205 | return NULL; /* Delegate operation to string conversion */ |
1206 | } |
1207 | off = -1; |
1208 | switch (method) { |
1209 | case lt_amg: |
1210 | case le_amg: |
1211 | case gt_amg: |
1212 | case ge_amg: |
1213 | case eq_amg: |
1214 | case ne_amg: |
1215 | postpr = 1; off=ncmp_amg; break; |
1216 | case slt_amg: |
1217 | case sle_amg: |
1218 | case sgt_amg: |
1219 | case sge_amg: |
1220 | case seq_amg: |
1221 | case sne_amg: |
1222 | postpr = 1; off=scmp_amg; break; |
1223 | } |
1224 | if (off != -1) cv = cvp[off]; |
1225 | if (!cv) { |
1226 | goto not_found; |
1227 | } |
1228 | } else { |
a6006777 |
1229 | not_found: /* No method found, either report or croak */ |
a0d0e21e |
1230 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1231 | notfound = 1; lr = -1; |
1232 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1233 | notfound = 1; lr = 1; |
1234 | } else { |
46fc3d4c |
1235 | SV *msg; |
774d564b |
1236 | if (off==-1) off=method; |
46fc3d4c |
1237 | msg = sv_2mortal(newSVpvf( |
1238 | "Operation `%s': no method found,%sargument %s%s%s%s", |
a6006777 |
1239 | AMG_names[method + assignshift], |
e7ea3e70 |
1240 | (flags & AMGf_unary ? " " : "\n\tleft "), |
a0d0e21e |
1241 | SvAMAGIC(left)? |
1242 | "in overloaded package ": |
1243 | "has no overloaded magic", |
1244 | SvAMAGIC(left)? |
1245 | HvNAME(SvSTASH(SvRV(left))): |
1246 | "", |
1247 | SvAMAGIC(right)? |
e7ea3e70 |
1248 | ",\n\tright argument in overloaded package ": |
1249 | (flags & AMGf_unary |
1250 | ? "" |
1251 | : ",\n\tright argument has no overloaded magic"), |
a0d0e21e |
1252 | SvAMAGIC(right)? |
1253 | HvNAME(SvSTASH(SvRV(right))): |
46fc3d4c |
1254 | "")); |
a0d0e21e |
1255 | if (amtp && amtp->fallback >= AMGfallYES) { |
46fc3d4c |
1256 | DEBUG_o( deb("%s", SvPVX(msg)) ); |
a0d0e21e |
1257 | } else { |
fc36a67e |
1258 | croak("%_", msg); |
a0d0e21e |
1259 | } |
1260 | return NULL; |
1261 | } |
1262 | } |
1263 | } |
1264 | if (!notfound) { |
774d564b |
1265 | DEBUG_o( deb( |
46fc3d4c |
1266 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
a6006777 |
1267 | AMG_names[off], |
748a9306 |
1268 | method+assignshift==off? "" : |
1269 | " (initially `", |
1270 | method+assignshift==off? "" : |
a6006777 |
1271 | AMG_names[method+assignshift], |
748a9306 |
1272 | method+assignshift==off? "" : "')", |
1273 | flags & AMGf_unary? "" : |
1274 | lr==1 ? " for right argument": " for left argument", |
1275 | flags & AMGf_unary? " for argument" : "", |
a0d0e21e |
1276 | HvNAME(stash), |
1277 | fl? ",\n\tassignment variant used": "") ); |
748a9306 |
1278 | /* Since we use shallow copy during assignment, we need |
1279 | * to dublicate the contents, probably calling user-supplied |
1280 | * version of copy operator |
1281 | */ |
c07a80fd |
1282 | if ((method + assignshift==off |
748a9306 |
1283 | && (assign || method==inc_amg || method==dec_amg)) |
1284 | || inc_dec_ass) RvDEEPCP(left); |
a0d0e21e |
1285 | } |
1286 | { |
1287 | dSP; |
1288 | BINOP myop; |
1289 | SV* res; |
54310121 |
1290 | bool oldcatch = CATCH_GET; |
a0d0e21e |
1291 | |
54310121 |
1292 | CATCH_SET(TRUE); |
a0d0e21e |
1293 | Zero(&myop, 1, BINOP); |
1294 | myop.op_last = (OP *) &myop; |
1295 | myop.op_next = Nullop; |
54310121 |
1296 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1297 | |
1298 | ENTER; |
462e5cf6 |
1299 | SAVEOP(); |
a0d0e21e |
1300 | op = (OP *) &myop; |
84902520 |
1301 | if (PERLDB_SUB && curstash != debstash) |
dc437b57 |
1302 | op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1303 | PUTBACK; |
11343788 |
1304 | pp_pushmark(ARGS); |
a0d0e21e |
1305 | |
1306 | EXTEND(sp, notfound + 5); |
1307 | PUSHs(lr>0? right: left); |
1308 | PUSHs(lr>0? left: right); |
5167a5b1 |
1309 | PUSHs( lr > 0 ? &sv_yes : ( assign ? &sv_undef : &sv_no )); |
a0d0e21e |
1310 | if (notfound) { |
a6006777 |
1311 | PUSHs( sv_2mortal(newSVpv((char *)AMG_names[method + assignshift],0)) ); |
a0d0e21e |
1312 | } |
1313 | PUSHs((SV*)cv); |
1314 | PUTBACK; |
1315 | |
11343788 |
1316 | if (op = pp_entersub(ARGS)) |
ad8898e0 |
1317 | runops(); |
a0d0e21e |
1318 | LEAVE; |
1319 | SPAGAIN; |
1320 | |
1321 | res=POPs; |
1322 | PUTBACK; |
54310121 |
1323 | CATCH_SET(oldcatch); |
a0d0e21e |
1324 | |
a0d0e21e |
1325 | if (postpr) { |
1326 | int ans; |
1327 | switch (method) { |
1328 | case le_amg: |
1329 | case sle_amg: |
1330 | ans=SvIV(res)<=0; break; |
1331 | case lt_amg: |
1332 | case slt_amg: |
1333 | ans=SvIV(res)<0; break; |
1334 | case ge_amg: |
1335 | case sge_amg: |
1336 | ans=SvIV(res)>=0; break; |
1337 | case gt_amg: |
1338 | case sgt_amg: |
1339 | ans=SvIV(res)>0; break; |
1340 | case eq_amg: |
1341 | case seq_amg: |
1342 | ans=SvIV(res)==0; break; |
1343 | case ne_amg: |
1344 | case sne_amg: |
1345 | ans=SvIV(res)!=0; break; |
1346 | case inc_amg: |
1347 | case dec_amg: |
bbce6d69 |
1348 | SvSetSV(left,res); return left; |
dc437b57 |
1349 | case not_amg: |
44a8e56a |
1350 | ans=!SvOK(res); break; |
a0d0e21e |
1351 | } |
54310121 |
1352 | return boolSV(ans); |
748a9306 |
1353 | } else if (method==copy_amg) { |
1354 | if (!SvROK(res)) { |
a6006777 |
1355 | croak("Copy method did not return a reference"); |
748a9306 |
1356 | } |
1357 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1358 | } else { |
1359 | return res; |
1360 | } |
1361 | } |
1362 | } |
1363 | #endif /* OVERLOAD */ |
4e35701f |
1364 | |