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); |
93965878 |
186 | /* NOTE: No support for tied ISA */ |
187 | I32 items = AvFILLp(av) + 1; |
79072805 |
188 | while (items--) { |
79072805 |
189 | SV* sv = *svp++; |
a0d0e21e |
190 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 |
191 | if (!basestash) { |
79072805 |
192 | if (dowarn) |
a0d0e21e |
193 | warn("Can't locate package %s for @%s::ISA", |
463ee0b2 |
194 | SvPVX(sv), HvNAME(stash)); |
79072805 |
195 | continue; |
196 | } |
44a8e56a |
197 | gv = gv_fetchmeth(basestash, name, len, |
198 | (level >= 0) ? level + 1 : level - 1); |
199 | if (gv) |
200 | goto gotcha; |
79072805 |
201 | } |
202 | } |
a0d0e21e |
203 | |
9607fc9c |
204 | /* if at top level, try UNIVERSAL */ |
205 | |
44a8e56a |
206 | if (level == 0 || level == -1) { |
9607fc9c |
207 | HV* lastchance; |
208 | |
dc437b57 |
209 | if (lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE)) { |
44a8e56a |
210 | if (gv = gv_fetchmeth(lastchance, name, len, |
211 | (level >= 0) ? level + 1 : level - 1)) { |
212 | gotcha: |
dc848c6f |
213 | /* |
214 | * Cache method in topgv if: |
215 | * 1. topgv has no synonyms (else inheritance crosses wires) |
216 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
217 | */ |
218 | if (topgv && |
219 | GvREFCNT(topgv) == 1 && |
220 | (cv = GvCV(gv)) && |
221 | (CvROOT(cv) || CvXSUB(cv))) |
222 | { |
44a8e56a |
223 | if (cv = GvCV(topgv)) |
224 | SvREFCNT_dec(cv); |
225 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
226 | GvCVGEN(topgv) = sub_generation; |
227 | } |
a0d0e21e |
228 | return gv; |
229 | } |
230 | } |
231 | } |
232 | |
79072805 |
233 | return 0; |
234 | } |
235 | |
236 | GV * |
8ac85365 |
237 | gv_fetchmethod(HV *stash, char *name) |
463ee0b2 |
238 | { |
dc848c6f |
239 | return gv_fetchmethod_autoload(stash, name, TRUE); |
240 | } |
241 | |
242 | GV * |
8ac85365 |
243 | gv_fetchmethod_autoload(HV *stash, char *name, I32 autoload) |
dc848c6f |
244 | { |
0f15f207 |
245 | dTHR; |
463ee0b2 |
246 | register char *nend; |
a0d0e21e |
247 | char *nsplit = 0; |
248 | GV* gv; |
463ee0b2 |
249 | |
250 | for (nend = name; *nend; nend++) { |
9607fc9c |
251 | if (*nend == '\'') |
a0d0e21e |
252 | nsplit = nend; |
9607fc9c |
253 | else if (*nend == ':' && *(nend + 1) == ':') |
254 | nsplit = ++nend; |
a0d0e21e |
255 | } |
256 | if (nsplit) { |
a0d0e21e |
257 | char *origname = name; |
258 | name = nsplit + 1; |
a0d0e21e |
259 | if (*nsplit == ':') |
260 | --nsplit; |
9607fc9c |
261 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
262 | /* ->SUPER::method should really be looked up in original stash */ |
fc36a67e |
263 | SV *tmpstr = sv_2mortal(newSVpvf("%s::SUPER", |
264 | HvNAME(curcop->cop_stash))); |
9607fc9c |
265 | stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); |
266 | DEBUG_o( deb("Treating %s as %s::%s\n", |
267 | origname, HvNAME(stash), name) ); |
4633a7c4 |
268 | } |
9607fc9c |
269 | else |
270 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); |
4633a7c4 |
271 | } |
272 | |
9607fc9c |
273 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
274 | if (!gv) { |
702887b4 |
275 | if (strEQ(name,"import")) |
dc437b57 |
276 | gv = (GV*)&sv_yes; |
dc848c6f |
277 | else if (autoload) |
54310121 |
278 | gv = gv_autoload4(stash, name, nend - name, TRUE); |
463ee0b2 |
279 | } |
dc848c6f |
280 | else if (autoload) { |
281 | CV* cv = GvCV(gv); |
09280a33 |
282 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
283 | GV* stubgv; |
284 | GV* autogv; |
285 | |
286 | if (CvANON(cv)) |
287 | stubgv = gv; |
288 | else { |
289 | stubgv = CvGV(cv); |
290 | if (GvCV(stubgv) != cv) /* orphaned import */ |
291 | stubgv = gv; |
292 | } |
293 | autogv = gv_autoload4(GvSTASH(stubgv), |
294 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
295 | if (autogv) |
296 | gv = autogv; |
297 | } |
298 | } |
44a8e56a |
299 | |
300 | return gv; |
301 | } |
302 | |
303 | GV* |
8ac85365 |
304 | gv_autoload4(HV *stash, char *name, STRLEN len, I32 method) |
44a8e56a |
305 | { |
306 | static char autoload[] = "AUTOLOAD"; |
307 | static STRLEN autolen = 8; |
308 | GV* gv; |
309 | CV* cv; |
310 | HV* varstash; |
311 | GV* vargv; |
312 | SV* varsv; |
313 | |
314 | if (len == autolen && strnEQ(name, autoload, autolen)) |
315 | return Nullgv; |
dc848c6f |
316 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
317 | return Nullgv; |
318 | cv = GvCV(gv); |
319 | |
320 | /* |
321 | * Inheriting AUTOLOAD for non-methods works ... for now. |
322 | */ |
323 | if (dowarn && !method && (GvCVGEN(gv) || GvSTASH(gv) != stash)) |
324 | warn( |
325 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
326 | HvNAME(stash), (int)len, name); |
44a8e56a |
327 | |
328 | /* |
329 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
330 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
331 | * use that, but for lack of anything better we will use the sub's |
332 | * original package to look up $AUTOLOAD. |
333 | */ |
334 | varstash = GvSTASH(CvGV(cv)); |
335 | vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); |
336 | if (!isGV(vargv)) |
337 | gv_init(vargv, varstash, autoload, autolen, FALSE); |
338 | varsv = GvSV(vargv); |
339 | sv_setpv(varsv, HvNAME(stash)); |
340 | sv_catpvn(varsv, "::", 2); |
341 | sv_catpvn(varsv, name, len); |
342 | SvTAINTED_off(varsv); |
a0d0e21e |
343 | return gv; |
344 | } |
345 | |
346 | HV* |
8ac85365 |
347 | gv_stashpv(char *name, I32 create) |
a0d0e21e |
348 | { |
dc437b57 |
349 | return gv_stashpvn(name, strlen(name), create); |
350 | } |
351 | |
352 | HV* |
8ac85365 |
353 | gv_stashpvn(char *name, U32 namelen, I32 create) |
dc437b57 |
354 | { |
46fc3d4c |
355 | char smallbuf[256]; |
356 | char *tmpbuf; |
a0d0e21e |
357 | HV *stash; |
358 | GV *tmpgv; |
dc437b57 |
359 | |
46fc3d4c |
360 | if (namelen + 3 < sizeof smallbuf) |
361 | tmpbuf = smallbuf; |
362 | else |
363 | New(606, tmpbuf, namelen + 3, char); |
dc437b57 |
364 | Copy(name,tmpbuf,namelen,char); |
365 | tmpbuf[namelen++] = ':'; |
366 | tmpbuf[namelen++] = ':'; |
367 | tmpbuf[namelen] = '\0'; |
46fc3d4c |
368 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
369 | if (tmpbuf != smallbuf) |
370 | Safefree(tmpbuf); |
a0d0e21e |
371 | if (!tmpgv) |
372 | return 0; |
373 | if (!GvHV(tmpgv)) |
374 | GvHV(tmpgv) = newHV(); |
375 | stash = GvHV(tmpgv); |
376 | if (!HvNAME(stash)) |
377 | HvNAME(stash) = savepv(name); |
378 | return stash; |
463ee0b2 |
379 | } |
380 | |
a0d0e21e |
381 | HV* |
8ac85365 |
382 | gv_stashsv(SV *sv, I32 create) |
a0d0e21e |
383 | { |
dc437b57 |
384 | register char *ptr; |
385 | STRLEN len; |
386 | ptr = SvPV(sv,len); |
387 | return gv_stashpvn(ptr, len, create); |
a0d0e21e |
388 | } |
389 | |
390 | |
463ee0b2 |
391 | GV * |
8ac85365 |
392 | gv_fetchpv(char *nambeg, I32 add, I32 sv_type) |
79072805 |
393 | { |
11343788 |
394 | dTHR; |
463ee0b2 |
395 | register char *name = nambeg; |
396 | register GV *gv = 0; |
79072805 |
397 | GV**gvp; |
79072805 |
398 | I32 len; |
399 | register char *namend; |
463ee0b2 |
400 | HV *stash = 0; |
9607fc9c |
401 | U32 add_gvflags = 0; |
85e6fe83 |
402 | char *tmpbuf; |
79072805 |
403 | |
c07a80fd |
404 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
405 | name++; |
406 | |
79072805 |
407 | for (namend = name; *namend; namend++) { |
463ee0b2 |
408 | if ((*namend == '\'' && namend[1]) || |
409 | (*namend == ':' && namend[1] == ':')) |
410 | { |
463ee0b2 |
411 | if (!stash) |
412 | stash = defstash; |
dc437b57 |
413 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e |
414 | return Nullgv; |
463ee0b2 |
415 | |
85e6fe83 |
416 | len = namend - name; |
417 | if (len > 0) { |
a0d0e21e |
418 | New(601, tmpbuf, len+3, char); |
419 | Copy(name, tmpbuf, len, char); |
420 | tmpbuf[len++] = ':'; |
421 | tmpbuf[len++] = ':'; |
422 | tmpbuf[len] = '\0'; |
463ee0b2 |
423 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
85e6fe83 |
424 | Safefree(tmpbuf); |
463ee0b2 |
425 | if (!gvp || *gvp == (GV*)&sv_undef) |
426 | return Nullgv; |
427 | gv = *gvp; |
85e6fe83 |
428 | |
463ee0b2 |
429 | if (SvTYPE(gv) == SVt_PVGV) |
a5f75d66 |
430 | GvMULTI_on(gv); |
a0d0e21e |
431 | else if (!add) |
432 | return Nullgv; |
463ee0b2 |
433 | else |
434 | gv_init(gv, stash, nambeg, namend - nambeg, (add & 2)); |
85e6fe83 |
435 | |
463ee0b2 |
436 | if (!(stash = GvHV(gv))) |
437 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
438 | |
463ee0b2 |
439 | if (!HvNAME(stash)) |
a0d0e21e |
440 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 |
441 | } |
442 | |
443 | if (*namend == ':') |
444 | namend++; |
445 | namend++; |
446 | name = namend; |
447 | if (!*name) |
dc437b57 |
448 | return gv ? gv : (GV*)*hv_fetch(defstash, "main::", 6, TRUE); |
79072805 |
449 | } |
79072805 |
450 | } |
a0d0e21e |
451 | len = namend - name; |
452 | if (!len) |
453 | len = 1; |
463ee0b2 |
454 | |
455 | /* No stash in name, so see how we can default */ |
456 | |
457 | if (!stash) { |
458 | if (isIDFIRST(*name)) { |
9607fc9c |
459 | bool global = FALSE; |
460 | |
463ee0b2 |
461 | if (isUPPER(*name)) { |
462 | if (*name > 'I') { |
463 | if (*name == 'S' && ( |
464 | strEQ(name, "SIG") || |
465 | strEQ(name, "STDIN") || |
466 | strEQ(name, "STDOUT") || |
467 | strEQ(name, "STDERR") )) |
468 | global = TRUE; |
469 | } |
470 | else if (*name > 'E') { |
471 | if (*name == 'I' && strEQ(name, "INC")) |
472 | global = TRUE; |
473 | } |
474 | else if (*name > 'A') { |
475 | if (*name == 'E' && strEQ(name, "ENV")) |
476 | global = TRUE; |
477 | } |
478 | else if (*name == 'A' && ( |
479 | strEQ(name, "ARGV") || |
480 | strEQ(name, "ARGVOUT") )) |
481 | global = TRUE; |
482 | } |
483 | else if (*name == '_' && !name[1]) |
484 | global = TRUE; |
9607fc9c |
485 | |
463ee0b2 |
486 | if (global) |
487 | stash = defstash; |
85e6fe83 |
488 | else if ((COP*)curcop == &compiling) { |
a0d0e21e |
489 | stash = curstash; |
748a9306 |
490 | if (add && (hints & HINT_STRICT_VARS) && |
491 | sv_type != SVt_PVCV && |
492 | sv_type != SVt_PVGV && |
4633a7c4 |
493 | sv_type != SVt_PVFM && |
c07a80fd |
494 | sv_type != SVt_PVIO && |
377b8fbc |
495 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
748a9306 |
496 | { |
4633a7c4 |
497 | gvp = (GV**)hv_fetch(stash,name,len,0); |
498 | if (!gvp || |
a5f75d66 |
499 | *gvp == (GV*)&sv_undef || |
500 | SvTYPE(*gvp) != SVt_PVGV) |
501 | { |
4633a7c4 |
502 | stash = 0; |
a5f75d66 |
503 | } |
504 | else if (sv_type == SVt_PV && !GvIMPORTED_SV(*gvp) || |
505 | sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp) || |
506 | sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp) ) |
4633a7c4 |
507 | { |
a5f75d66 |
508 | warn("Variable \"%c%s\" is not imported", |
4633a7c4 |
509 | sv_type == SVt_PVAV ? '@' : |
510 | sv_type == SVt_PVHV ? '%' : '$', |
511 | name); |
8ebc5c01 |
512 | if (GvCVu(*gvp)) |
4633a7c4 |
513 | warn("(Did you mean &%s instead?)\n", name); |
a0d0e21e |
514 | stash = 0; |
4633a7c4 |
515 | } |
a0d0e21e |
516 | } |
85e6fe83 |
517 | } |
463ee0b2 |
518 | else |
519 | stash = curcop->cop_stash; |
520 | } |
521 | else |
522 | stash = defstash; |
523 | } |
524 | |
525 | /* By this point we should have a stash and a name */ |
526 | |
a0d0e21e |
527 | if (!stash) { |
528 | if (add) { |
529 | warn("Global symbol \"%s\" requires explicit package name", name); |
530 | ++error_count; |
531 | stash = curstash ? curstash : defstash; /* avoid core dumps */ |
9607fc9c |
532 | add_gvflags = ((sv_type == SVt_PV) ? GVf_IMPORTED_SV |
533 | : (sv_type == SVt_PVAV) ? GVf_IMPORTED_AV |
534 | : (sv_type == SVt_PVHV) ? GVf_IMPORTED_HV |
535 | : 0); |
a0d0e21e |
536 | } |
537 | else |
538 | return Nullgv; |
539 | } |
540 | |
541 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
542 | return Nullgv; |
543 | |
79072805 |
544 | gvp = (GV**)hv_fetch(stash,name,len,add); |
545 | if (!gvp || *gvp == (GV*)&sv_undef) |
546 | return Nullgv; |
547 | gv = *gvp; |
548 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
549 | if (add) { |
a5f75d66 |
550 | GvMULTI_on(gv); |
a0d0e21e |
551 | gv_init_sv(gv, sv_type); |
552 | } |
79072805 |
553 | return gv; |
554 | } |
93a17b20 |
555 | |
556 | /* Adding a new symbol */ |
557 | |
a0d0e21e |
558 | if (add & 4) |
559 | warn("Had to create %s unexpectedly", nambeg); |
463ee0b2 |
560 | gv_init(gv, stash, name, len, add & 2); |
a0d0e21e |
561 | gv_init_sv(gv, sv_type); |
9607fc9c |
562 | GvFLAGS(gv) |= add_gvflags; |
93a17b20 |
563 | |
564 | /* set up magic where warranted */ |
565 | switch (*name) { |
a0d0e21e |
566 | case 'A': |
567 | if (strEQ(name, "ARGV")) { |
568 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
569 | } |
570 | break; |
571 | |
ed6116ce |
572 | case 'a': |
573 | case 'b': |
574 | if (len == 1) |
a5f75d66 |
575 | GvMULTI_on(gv); |
ed6116ce |
576 | break; |
a0d0e21e |
577 | case 'E': |
578 | if (strnEQ(name, "EXPORT", 6)) |
a5f75d66 |
579 | GvMULTI_on(gv); |
a0d0e21e |
580 | break; |
463ee0b2 |
581 | case 'I': |
582 | if (strEQ(name, "ISA")) { |
583 | AV* av = GvAVn(gv); |
a5f75d66 |
584 | GvMULTI_on(gv); |
a0d0e21e |
585 | sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0); |
93965878 |
586 | /* NOTE: No support for tied ISA */ |
587 | if (add & 2 && strEQ(nambeg,"AnyDBM_File::ISA") && AvFILLp(av) == -1) |
85e6fe83 |
588 | { |
a0d0e21e |
589 | char *pname; |
590 | av_push(av, newSVpv(pname = "NDBM_File",0)); |
dc437b57 |
591 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e |
592 | av_push(av, newSVpv(pname = "DB_File",0)); |
dc437b57 |
593 | gv_stashpvn(pname, 7, TRUE); |
a0d0e21e |
594 | av_push(av, newSVpv(pname = "GDBM_File",0)); |
dc437b57 |
595 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e |
596 | av_push(av, newSVpv(pname = "SDBM_File",0)); |
dc437b57 |
597 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e |
598 | av_push(av, newSVpv(pname = "ODBM_File",0)); |
dc437b57 |
599 | gv_stashpvn(pname, 9, TRUE); |
85e6fe83 |
600 | } |
463ee0b2 |
601 | } |
602 | break; |
a0d0e21e |
603 | #ifdef OVERLOAD |
604 | case 'O': |
605 | if (strEQ(name, "OVERLOAD")) { |
606 | HV* hv = GvHVn(gv); |
a5f75d66 |
607 | GvMULTI_on(gv); |
ea0efc06 |
608 | hv_magic(hv, gv, 'A'); |
a0d0e21e |
609 | } |
610 | break; |
611 | #endif /* OVERLOAD */ |
93a17b20 |
612 | case 'S': |
613 | if (strEQ(name, "SIG")) { |
614 | HV *hv; |
dc437b57 |
615 | I32 i; |
93a17b20 |
616 | siggv = gv; |
a5f75d66 |
617 | GvMULTI_on(siggv); |
93a17b20 |
618 | hv = GvHVn(siggv); |
619 | hv_magic(hv, siggv, 'S'); |
dc437b57 |
620 | for(i=1;sig_name[i];i++) { |
621 | SV ** init; |
622 | init=hv_fetch(hv,sig_name[i],strlen(sig_name[i]),1); |
623 | if(init) |
624 | sv_setsv(*init,&sv_undef); |
625 | psig_ptr[i] = 0; |
626 | psig_name[i] = 0; |
627 | } |
93a17b20 |
628 | /* initialize signal stack */ |
629 | signalstack = newAV(); |
93a17b20 |
630 | AvREAL_off(signalstack); |
a0d0e21e |
631 | av_extend(signalstack, 30); |
632 | av_fill(signalstack, 0); |
93a17b20 |
633 | } |
634 | break; |
635 | |
636 | case '&': |
463ee0b2 |
637 | if (len > 1) |
638 | break; |
93a17b20 |
639 | ampergv = gv; |
640 | sawampersand = TRUE; |
a0d0e21e |
641 | goto ro_magicalize; |
93a17b20 |
642 | |
643 | case '`': |
463ee0b2 |
644 | if (len > 1) |
645 | break; |
93a17b20 |
646 | leftgv = gv; |
647 | sawampersand = TRUE; |
a0d0e21e |
648 | goto ro_magicalize; |
93a17b20 |
649 | |
650 | case '\'': |
463ee0b2 |
651 | if (len > 1) |
652 | break; |
93a17b20 |
653 | rightgv = gv; |
654 | sawampersand = TRUE; |
a0d0e21e |
655 | goto ro_magicalize; |
93a17b20 |
656 | |
657 | case ':': |
463ee0b2 |
658 | if (len > 1) |
659 | break; |
93a17b20 |
660 | sv_setpv(GvSV(gv),chopset); |
661 | goto magicalize; |
662 | |
ff0cee69 |
663 | case '?': |
664 | if (len > 1) |
665 | break; |
666 | #ifdef COMPLEX_STATUS |
667 | sv_upgrade(GvSV(gv), SVt_PVLV); |
668 | #endif |
669 | goto magicalize; |
670 | |
93a17b20 |
671 | case '#': |
a0d0e21e |
672 | case '*': |
673 | if (dowarn && len == 1 && sv_type == SVt_PV) |
674 | warn("Use of $%s is deprecated", name); |
675 | /* FALL THROUGH */ |
676 | case '[': |
677 | case '!': |
93a17b20 |
678 | case '^': |
679 | case '~': |
680 | case '=': |
681 | case '-': |
682 | case '%': |
683 | case '.': |
93a17b20 |
684 | case '(': |
685 | case ')': |
686 | case '<': |
687 | case '>': |
688 | case ',': |
689 | case '\\': |
690 | case '/': |
93a17b20 |
691 | case '|': |
748a9306 |
692 | case '\001': |
93a17b20 |
693 | case '\004': |
ad8898e0 |
694 | case '\005': |
748a9306 |
695 | case '\006': |
a0d0e21e |
696 | case '\010': |
ad8898e0 |
697 | case '\017': |
93a17b20 |
698 | case '\t': |
699 | case '\020': |
700 | case '\024': |
701 | case '\027': |
463ee0b2 |
702 | if (len > 1) |
703 | break; |
704 | goto magicalize; |
705 | |
a0d0e21e |
706 | case '+': |
463ee0b2 |
707 | case '1': |
708 | case '2': |
709 | case '3': |
710 | case '4': |
711 | case '5': |
712 | case '6': |
713 | case '7': |
714 | case '8': |
715 | case '9': |
fb73857a |
716 | case '\023': |
a0d0e21e |
717 | ro_magicalize: |
718 | SvREADONLY_on(GvSV(gv)); |
93a17b20 |
719 | magicalize: |
463ee0b2 |
720 | sv_magic(GvSV(gv), (SV*)gv, 0, name, len); |
93a17b20 |
721 | break; |
722 | |
723 | case '\014': |
463ee0b2 |
724 | if (len > 1) |
725 | break; |
93a17b20 |
726 | sv_setpv(GvSV(gv),"\f"); |
727 | formfeed = GvSV(gv); |
728 | break; |
729 | case ';': |
463ee0b2 |
730 | if (len > 1) |
731 | break; |
93a17b20 |
732 | sv_setpv(GvSV(gv),"\034"); |
733 | break; |
463ee0b2 |
734 | case ']': |
735 | if (len == 1) { |
f86702cc |
736 | SV *sv = GvSV(gv); |
93a17b20 |
737 | sv_upgrade(sv, SVt_PVNV); |
a0d0e21e |
738 | sv_setpv(sv, patchlevel); |
f86702cc |
739 | (void)sv_2nv(sv); |
740 | SvREADONLY_on(sv); |
93a17b20 |
741 | } |
742 | break; |
79072805 |
743 | } |
93a17b20 |
744 | return gv; |
79072805 |
745 | } |
746 | |
747 | void |
8ac85365 |
748 | gv_fullname3(SV *sv, GV *gv, char *prefix) |
79072805 |
749 | { |
750 | HV *hv = GvSTASH(gv); |
f967eb5f |
751 | if (!hv) { |
752 | SvOK_off(sv); |
79072805 |
753 | return; |
f967eb5f |
754 | } |
755 | sv_setpv(sv, prefix ? prefix : ""); |
79072805 |
756 | sv_catpv(sv,HvNAME(hv)); |
463ee0b2 |
757 | sv_catpvn(sv,"::", 2); |
79072805 |
758 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
759 | } |
760 | |
761 | void |
8ac85365 |
762 | gv_efullname3(SV *sv, GV *gv, char *prefix) |
79072805 |
763 | { |
f967eb5f |
764 | GV *egv = GvEGV(gv); |
748a9306 |
765 | if (!egv) |
766 | egv = gv; |
f6aff53a |
767 | gv_fullname3(sv, egv, prefix); |
768 | } |
769 | |
770 | /* XXX compatibility with versions <= 5.003. */ |
771 | void |
8ac85365 |
772 | gv_fullname(SV *sv, GV *gv) |
f6aff53a |
773 | { |
774 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
775 | } |
776 | |
777 | /* XXX compatibility with versions <= 5.003. */ |
778 | void |
8ac85365 |
779 | gv_efullname(SV *sv, GV *gv) |
f6aff53a |
780 | { |
781 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
79072805 |
782 | } |
783 | |
784 | IO * |
8ac85365 |
785 | newIO(void) |
79072805 |
786 | { |
11343788 |
787 | dTHR; |
79072805 |
788 | IO *io; |
8990e307 |
789 | GV *iogv; |
790 | |
791 | io = (IO*)NEWSV(0,0); |
a0d0e21e |
792 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 |
793 | SvREFCNT(io) = 1; |
794 | SvOBJECT_on(io); |
c9de509e |
795 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
796 | if (!iogv) |
797 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
8990e307 |
798 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 |
799 | return io; |
800 | } |
801 | |
802 | void |
8ac85365 |
803 | gv_check(HV *stash) |
79072805 |
804 | { |
11343788 |
805 | dTHR; |
79072805 |
806 | register HE *entry; |
807 | register I32 i; |
808 | register GV *gv; |
463ee0b2 |
809 | HV *hv; |
a0d0e21e |
810 | GV *filegv; |
463ee0b2 |
811 | |
8990e307 |
812 | if (!HvARRAY(stash)) |
813 | return; |
a0d0e21e |
814 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
dc437b57 |
815 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
816 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
817 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv)) |
a0d0e21e |
818 | { |
819 | if (hv != defstash) |
820 | gv_check(hv); /* nested package */ |
821 | } |
dc437b57 |
822 | else if (isALPHA(*HeKEY(entry))) { |
823 | gv = (GV*)HeVAL(entry); |
a5f75d66 |
824 | if (GvMULTI(gv)) |
463ee0b2 |
825 | continue; |
826 | curcop->cop_line = GvLINE(gv); |
a0d0e21e |
827 | filegv = GvFILEGV(gv); |
828 | curcop->cop_filegv = filegv; |
a5f75d66 |
829 | if (filegv && GvMULTI(filegv)) /* Filename began with slash */ |
8990e307 |
830 | continue; |
dc437b57 |
831 | warn("Name \"%s::%s\" used only once: possible typo", |
a0d0e21e |
832 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 |
833 | } |
79072805 |
834 | } |
835 | } |
836 | } |
837 | |
838 | GV * |
8ac85365 |
839 | newGVgen(char *pack) |
79072805 |
840 | { |
46fc3d4c |
841 | return gv_fetchpv(form("%s::_GEN_%ld", pack, (long)gensym++), |
842 | TRUE, SVt_PVGV); |
79072805 |
843 | } |
844 | |
845 | /* hopefully this is only called on local symbol table entries */ |
846 | |
847 | GP* |
8ac85365 |
848 | gp_ref(GP *gp) |
79072805 |
849 | { |
850 | gp->gp_refcnt++; |
44a8e56a |
851 | if (gp->gp_cv) { |
852 | if (gp->gp_cvgen) { |
853 | /* multi-named GPs cannot be used for method cache */ |
854 | SvREFCNT_dec(gp->gp_cv); |
855 | gp->gp_cv = Nullcv; |
856 | gp->gp_cvgen = 0; |
857 | } |
858 | else { |
859 | /* Adding a new name to a subroutine invalidates method cache */ |
860 | sub_generation++; |
861 | } |
862 | } |
79072805 |
863 | return gp; |
79072805 |
864 | } |
865 | |
866 | void |
8ac85365 |
867 | gp_free(GV *gv) |
79072805 |
868 | { |
79072805 |
869 | GP* gp; |
377b8fbc |
870 | CV* cv; |
79072805 |
871 | |
872 | if (!gv || !(gp = GvGP(gv))) |
873 | return; |
874 | if (gp->gp_refcnt == 0) { |
875 | warn("Attempt to free unreferenced glob pointers"); |
876 | return; |
877 | } |
44a8e56a |
878 | if (gp->gp_cv) { |
879 | /* Deleting the name of a subroutine invalidates method cache */ |
880 | sub_generation++; |
881 | } |
748a9306 |
882 | if (--gp->gp_refcnt > 0) { |
883 | if (gp->gp_egv == gv) |
884 | gp->gp_egv = 0; |
79072805 |
885 | return; |
748a9306 |
886 | } |
79072805 |
887 | |
8990e307 |
888 | SvREFCNT_dec(gp->gp_sv); |
889 | SvREFCNT_dec(gp->gp_av); |
890 | SvREFCNT_dec(gp->gp_hv); |
377b8fbc |
891 | SvREFCNT_dec(gp->gp_io); |
a6006777 |
892 | SvREFCNT_dec(gp->gp_cv); |
748a9306 |
893 | SvREFCNT_dec(gp->gp_form); |
894 | |
79072805 |
895 | Safefree(gp); |
896 | GvGP(gv) = 0; |
897 | } |
898 | |
899 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) |
900 | #define MICROPORT |
901 | #endif |
902 | |
903 | #ifdef MICROPORT /* Microport 2.4 hack */ |
904 | AV *GvAVn(gv) |
905 | register GV *gv; |
906 | { |
907 | if (GvGP(gv)->gp_av) |
908 | return GvGP(gv)->gp_av; |
909 | else |
910 | return GvGP(gv_AVadd(gv))->gp_av; |
911 | } |
912 | |
913 | HV *GvHVn(gv) |
914 | register GV *gv; |
915 | { |
916 | if (GvGP(gv)->gp_hv) |
917 | return GvGP(gv)->gp_hv; |
918 | else |
919 | return GvGP(gv_HVadd(gv))->gp_hv; |
920 | } |
921 | #endif /* Microport 2.4 hack */ |
a0d0e21e |
922 | |
923 | #ifdef OVERLOAD |
924 | /* Updates and caches the CV's */ |
925 | |
926 | bool |
8ac85365 |
927 | Gv_AMupdate(HV *stash) |
a0d0e21e |
928 | { |
11343788 |
929 | dTHR; |
a0d0e21e |
930 | GV** gvp; |
931 | HV* hv; |
932 | GV* gv; |
933 | CV* cv; |
934 | MAGIC* mg=mg_find((SV*)stash,'c'); |
8ac85365 |
935 | AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
a6006777 |
936 | AMT amt; |
a0d0e21e |
937 | |
e7ea3e70 |
938 | if (mg && amtp->was_ok_am == amagic_generation |
939 | && amtp->was_ok_sub == sub_generation) |
a6006777 |
940 | return AMT_AMAGIC(amtp); |
941 | if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */ |
748a9306 |
942 | int i; |
a6006777 |
943 | for (i=1; i<NofAMmeth; i++) { |
748a9306 |
944 | if (amtp->table[i]) { |
945 | SvREFCNT_dec(amtp->table[i]); |
946 | } |
947 | } |
948 | } |
a0d0e21e |
949 | sv_unmagic((SV*)stash, 'c'); |
950 | |
951 | DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) ); |
952 | |
a6006777 |
953 | amt.was_ok_am = amagic_generation; |
954 | amt.was_ok_sub = sub_generation; |
955 | amt.fallback = AMGfallNO; |
956 | amt.flags = 0; |
957 | |
958 | #ifdef OVERLOAD_VIA_HASH |
959 | gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */ |
a0d0e21e |
960 | if (gvp && ((gv = *gvp) != (GV*)&sv_undef && (hv = GvHV(gv)))) { |
961 | int filled=0; |
962 | int i; |
963 | char *cp; |
a0d0e21e |
964 | SV* sv; |
965 | SV** svp; |
a0d0e21e |
966 | |
967 | /* Work with "fallback" key, which we assume to be first in AMG_names */ |
968 | |
a6006777 |
969 | if (( cp = (char *)AMG_names[0] ) && |
970 | (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) { |
a0d0e21e |
971 | if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
972 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
973 | } |
a6006777 |
974 | for (i = 1; i < NofAMmeth; i++) { |
975 | cv = 0; |
976 | cp = (char *)AMG_names[i]; |
977 | |
978 | svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE); |
dc437b57 |
979 | if (svp && ((sv = *svp) != &sv_undef)) { |
a0d0e21e |
980 | switch (SvTYPE(sv)) { |
981 | default: |
982 | if (!SvROK(sv)) { |
983 | if (!SvOK(sv)) break; |
748a9306 |
984 | gv = gv_fetchmethod(stash, SvPV(sv, na)); |
a0d0e21e |
985 | if (gv) cv = GvCV(gv); |
986 | break; |
987 | } |
988 | cv = (CV*)SvRV(sv); |
989 | if (SvTYPE(cv) == SVt_PVCV) |
990 | break; |
991 | /* FALL THROUGH */ |
992 | case SVt_PVHV: |
993 | case SVt_PVAV: |
a6006777 |
994 | croak("Not a subroutine reference in overload table"); |
a0d0e21e |
995 | return FALSE; |
996 | case SVt_PVCV: |
8ebc5c01 |
997 | cv = (CV*)sv; |
998 | break; |
a0d0e21e |
999 | case SVt_PVGV: |
8ebc5c01 |
1000 | if (!(cv = GvCVu((GV*)sv))) |
1001 | cv = sv_2cv(sv, &stash, &gv, TRUE); |
1002 | break; |
a0d0e21e |
1003 | } |
1004 | if (cv) filled=1; |
1005 | else { |
a6006777 |
1006 | croak("Method for operation %s not found in package %.256s during blessing\n", |
a0d0e21e |
1007 | cp,HvNAME(stash)); |
1008 | return FALSE; |
1009 | } |
1010 | } |
a6006777 |
1011 | #else |
1012 | { |
1013 | int filled = 0; |
1014 | int i; |
9607fc9c |
1015 | const char *cp; |
a6006777 |
1016 | SV* sv = NULL; |
1017 | SV** svp; |
1018 | |
1019 | /* Work with "fallback" key, which we assume to be first in AMG_names */ |
1020 | |
9607fc9c |
1021 | if ( cp = AMG_names[0] ) { |
a6006777 |
1022 | /* Try to find via inheritance. */ |
774d564b |
1023 | gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */ |
a6006777 |
1024 | if (gv) sv = GvSV(gv); |
1025 | |
774d564b |
1026 | if (!gv) goto no_table; |
a6006777 |
1027 | else if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1028 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
1029 | } |
1030 | |
1031 | for (i = 1; i < NofAMmeth; i++) { |
46fc3d4c |
1032 | SV *cookie = sv_2mortal(newSVpvf("(%s", cp = AMG_names[i])); |
44a8e56a |
1033 | DEBUG_o( deb("Checking overloading of `%s' in package `%.256s'\n", |
1034 | cp, HvNAME(stash)) ); |
46fc3d4c |
1035 | /* don't fill the cache while looking up! */ |
1036 | gv = gv_fetchmeth(stash, SvPVX(cookie), SvCUR(cookie), -1); |
1037 | cv = 0; |
44a8e56a |
1038 | if(gv && (cv = GvCV(gv))) { |
44a8e56a |
1039 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
1040 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { |
1041 | /* GvSV contains the name of the method. */ |
1042 | GV *ngv; |
1043 | |
1044 | DEBUG_o( deb("Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", |
1045 | SvPV(GvSV(gv), na), cp, HvNAME(stash)) ); |
dc848c6f |
1046 | if (!SvPOK(GvSV(gv)) |
1047 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), |
1048 | FALSE))) |
1049 | { |
44a8e56a |
1050 | /* Can be an import stub (created by `can'). */ |
1051 | if (GvCVGEN(gv)) { |
1052 | croak("Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", |
1053 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1054 | cp, HvNAME(stash)); |
1055 | } else |
1056 | croak("Cannot resolve method `%.256s' overloading `%s' in package `%.256s'", |
1057 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1058 | cp, HvNAME(stash)); |
1059 | } |
dc848c6f |
1060 | cv = GvCV(gv = ngv); |
44a8e56a |
1061 | } |
1062 | DEBUG_o( deb("Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", |
1063 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), |
1064 | GvNAME(CvGV(cv))) ); |
1065 | filled = 1; |
1066 | } |
a6006777 |
1067 | #endif |
1068 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e |
1069 | } |
a0d0e21e |
1070 | if (filled) { |
a6006777 |
1071 | AMT_AMAGIC_on(&amt); |
1072 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT)); |
a0d0e21e |
1073 | return TRUE; |
1074 | } |
1075 | } |
a6006777 |
1076 | /* Here we have no table: */ |
774d564b |
1077 | no_table: |
a6006777 |
1078 | AMT_AMAGIC_off(&amt); |
1079 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1080 | return FALSE; |
1081 | } |
1082 | |
1083 | /* During call to this subroutine stack can be reallocated. It is |
1084 | * advised to call SPAGAIN macro in your code after call */ |
1085 | |
1086 | SV* |
8ac85365 |
1087 | amagic_call(SV *left, SV *right, int method, int flags) |
a0d0e21e |
1088 | { |
11343788 |
1089 | dTHR; |
a0d0e21e |
1090 | MAGIC *mg; |
1091 | CV *cv; |
1092 | CV **cvp=NULL, **ocvp=NULL; |
1093 | AMT *amtp, *oamtp; |
1094 | int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; |
748a9306 |
1095 | int postpr=0, inc_dec_ass=0, assignshift=assign?1:0; |
a0d0e21e |
1096 | HV* stash; |
1097 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
1098 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c')) |
a6006777 |
1099 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1100 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1101 | : (CV **) NULL)) |
748a9306 |
1102 | && ((cv = cvp[off=method+assignshift]) |
1103 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1104 | * usual method */ |
1105 | (fl = 1, cv = cvp[off=method])))) { |
a0d0e21e |
1106 | lr = -1; /* Call method for left argument */ |
1107 | } else { |
1108 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1109 | int logic; |
1110 | |
1111 | /* look for substituted methods */ |
1112 | switch (method) { |
1113 | case inc_amg: |
748a9306 |
1114 | if (((cv = cvp[off=add_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e |
1115 | || ((cv = cvp[off=add_amg]) && (postpr=1))) { |
1116 | right = &sv_yes; lr = -1; assign = 1; |
1117 | } |
1118 | break; |
1119 | case dec_amg: |
748a9306 |
1120 | if (((cv = cvp[off=subtr_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e |
1121 | || ((cv = cvp[off=subtr_amg]) && (postpr=1))) { |
1122 | right = &sv_yes; lr = -1; assign = 1; |
1123 | } |
1124 | break; |
1125 | case bool__amg: |
1126 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1127 | break; |
1128 | case numer_amg: |
1129 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1130 | break; |
1131 | case string_amg: |
1132 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1133 | break; |
dc437b57 |
1134 | case not_amg: |
1135 | (void)((cv = cvp[off=bool__amg]) |
1136 | || (cv = cvp[off=numer_amg]) |
1137 | || (cv = cvp[off=string_amg])); |
1138 | postpr = 1; |
1139 | break; |
748a9306 |
1140 | case copy_amg: |
1141 | { |
1142 | SV* ref=SvRV(left); |
fc36a67e |
1143 | if (!SvROK(ref) && SvTYPE(ref) <= SVt_PVMG) { |
1144 | /* |
1145 | * Just to be extra cautious. Maybe in some |
1146 | * additional cases sv_setsv is safe, too. |
1147 | */ |
748a9306 |
1148 | SV* newref = newSVsv(ref); |
1149 | SvOBJECT_on(newref); |
1150 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(ref)); |
1151 | return newref; |
1152 | } |
1153 | } |
1154 | break; |
a0d0e21e |
1155 | case abs_amg: |
748a9306 |
1156 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1157 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 |
1158 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1159 | if (off1==lt_amg) { |
748a9306 |
1160 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1161 | lt_amg,AMGf_noright); |
1162 | logic = SvTRUE(lessp); |
1163 | } else { |
748a9306 |
1164 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1165 | ncmp_amg,AMGf_noright); |
1166 | logic = (SvNV(lessp) < 0); |
1167 | } |
1168 | if (logic) { |
1169 | if (off==subtr_amg) { |
1170 | right = left; |
748a9306 |
1171 | left = nullsv; |
a0d0e21e |
1172 | lr = 1; |
1173 | } |
1174 | } else { |
1175 | return left; |
1176 | } |
1177 | } |
1178 | break; |
1179 | case neg_amg: |
1180 | if (cv = cvp[off=subtr_amg]) { |
1181 | right = left; |
1182 | left = sv_2mortal(newSViv(0)); |
1183 | lr = 1; |
1184 | } |
1185 | break; |
1186 | default: |
1187 | goto not_found; |
1188 | } |
1189 | if (!cv) goto not_found; |
1190 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
1191 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c')) |
a6006777 |
1192 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1193 | ? (amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1194 | : (CV **) NULL)) |
a0d0e21e |
1195 | && (cv = cvp[off=method])) { /* Method for right |
1196 | * argument found */ |
1197 | lr=1; |
748a9306 |
1198 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
4633a7c4 |
1199 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1200 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1201 | && !(flags & AMGf_unary)) { |
1202 | /* We look for substitution for |
1203 | * comparison operations and |
fc36a67e |
1204 | * concatenation */ |
a0d0e21e |
1205 | if (method==concat_amg || method==concat_ass_amg |
1206 | || method==repeat_amg || method==repeat_ass_amg) { |
1207 | return NULL; /* Delegate operation to string conversion */ |
1208 | } |
1209 | off = -1; |
1210 | switch (method) { |
1211 | case lt_amg: |
1212 | case le_amg: |
1213 | case gt_amg: |
1214 | case ge_amg: |
1215 | case eq_amg: |
1216 | case ne_amg: |
1217 | postpr = 1; off=ncmp_amg; break; |
1218 | case slt_amg: |
1219 | case sle_amg: |
1220 | case sgt_amg: |
1221 | case sge_amg: |
1222 | case seq_amg: |
1223 | case sne_amg: |
1224 | postpr = 1; off=scmp_amg; break; |
1225 | } |
1226 | if (off != -1) cv = cvp[off]; |
1227 | if (!cv) { |
1228 | goto not_found; |
1229 | } |
1230 | } else { |
a6006777 |
1231 | not_found: /* No method found, either report or croak */ |
a0d0e21e |
1232 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1233 | notfound = 1; lr = -1; |
1234 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1235 | notfound = 1; lr = 1; |
1236 | } else { |
46fc3d4c |
1237 | SV *msg; |
774d564b |
1238 | if (off==-1) off=method; |
46fc3d4c |
1239 | msg = sv_2mortal(newSVpvf( |
1240 | "Operation `%s': no method found,%sargument %s%s%s%s", |
a6006777 |
1241 | AMG_names[method + assignshift], |
e7ea3e70 |
1242 | (flags & AMGf_unary ? " " : "\n\tleft "), |
a0d0e21e |
1243 | SvAMAGIC(left)? |
1244 | "in overloaded package ": |
1245 | "has no overloaded magic", |
1246 | SvAMAGIC(left)? |
1247 | HvNAME(SvSTASH(SvRV(left))): |
1248 | "", |
1249 | SvAMAGIC(right)? |
e7ea3e70 |
1250 | ",\n\tright argument in overloaded package ": |
1251 | (flags & AMGf_unary |
1252 | ? "" |
1253 | : ",\n\tright argument has no overloaded magic"), |
a0d0e21e |
1254 | SvAMAGIC(right)? |
1255 | HvNAME(SvSTASH(SvRV(right))): |
46fc3d4c |
1256 | "")); |
a0d0e21e |
1257 | if (amtp && amtp->fallback >= AMGfallYES) { |
46fc3d4c |
1258 | DEBUG_o( deb("%s", SvPVX(msg)) ); |
a0d0e21e |
1259 | } else { |
fc36a67e |
1260 | croak("%_", msg); |
a0d0e21e |
1261 | } |
1262 | return NULL; |
1263 | } |
1264 | } |
1265 | } |
1266 | if (!notfound) { |
774d564b |
1267 | DEBUG_o( deb( |
46fc3d4c |
1268 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
a6006777 |
1269 | AMG_names[off], |
748a9306 |
1270 | method+assignshift==off? "" : |
1271 | " (initially `", |
1272 | method+assignshift==off? "" : |
a6006777 |
1273 | AMG_names[method+assignshift], |
748a9306 |
1274 | method+assignshift==off? "" : "')", |
1275 | flags & AMGf_unary? "" : |
1276 | lr==1 ? " for right argument": " for left argument", |
1277 | flags & AMGf_unary? " for argument" : "", |
a0d0e21e |
1278 | HvNAME(stash), |
1279 | fl? ",\n\tassignment variant used": "") ); |
748a9306 |
1280 | /* Since we use shallow copy during assignment, we need |
1281 | * to dublicate the contents, probably calling user-supplied |
1282 | * version of copy operator |
1283 | */ |
c07a80fd |
1284 | if ((method + assignshift==off |
748a9306 |
1285 | && (assign || method==inc_amg || method==dec_amg)) |
1286 | || inc_dec_ass) RvDEEPCP(left); |
a0d0e21e |
1287 | } |
1288 | { |
1289 | dSP; |
1290 | BINOP myop; |
1291 | SV* res; |
54310121 |
1292 | bool oldcatch = CATCH_GET; |
a0d0e21e |
1293 | |
54310121 |
1294 | CATCH_SET(TRUE); |
a0d0e21e |
1295 | Zero(&myop, 1, BINOP); |
1296 | myop.op_last = (OP *) &myop; |
1297 | myop.op_next = Nullop; |
54310121 |
1298 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1299 | |
1300 | ENTER; |
462e5cf6 |
1301 | SAVEOP(); |
a0d0e21e |
1302 | op = (OP *) &myop; |
84902520 |
1303 | if (PERLDB_SUB && curstash != debstash) |
dc437b57 |
1304 | op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1305 | PUTBACK; |
11343788 |
1306 | pp_pushmark(ARGS); |
a0d0e21e |
1307 | |
1308 | EXTEND(sp, notfound + 5); |
1309 | PUSHs(lr>0? right: left); |
1310 | PUSHs(lr>0? left: right); |
5167a5b1 |
1311 | PUSHs( lr > 0 ? &sv_yes : ( assign ? &sv_undef : &sv_no )); |
a0d0e21e |
1312 | if (notfound) { |
a6006777 |
1313 | PUSHs( sv_2mortal(newSVpv((char *)AMG_names[method + assignshift],0)) ); |
a0d0e21e |
1314 | } |
1315 | PUSHs((SV*)cv); |
1316 | PUTBACK; |
1317 | |
11343788 |
1318 | if (op = pp_entersub(ARGS)) |
ad8898e0 |
1319 | runops(); |
a0d0e21e |
1320 | LEAVE; |
1321 | SPAGAIN; |
1322 | |
1323 | res=POPs; |
1324 | PUTBACK; |
54310121 |
1325 | CATCH_SET(oldcatch); |
a0d0e21e |
1326 | |
a0d0e21e |
1327 | if (postpr) { |
1328 | int ans; |
1329 | switch (method) { |
1330 | case le_amg: |
1331 | case sle_amg: |
1332 | ans=SvIV(res)<=0; break; |
1333 | case lt_amg: |
1334 | case slt_amg: |
1335 | ans=SvIV(res)<0; break; |
1336 | case ge_amg: |
1337 | case sge_amg: |
1338 | ans=SvIV(res)>=0; break; |
1339 | case gt_amg: |
1340 | case sgt_amg: |
1341 | ans=SvIV(res)>0; break; |
1342 | case eq_amg: |
1343 | case seq_amg: |
1344 | ans=SvIV(res)==0; break; |
1345 | case ne_amg: |
1346 | case sne_amg: |
1347 | ans=SvIV(res)!=0; break; |
1348 | case inc_amg: |
1349 | case dec_amg: |
bbce6d69 |
1350 | SvSetSV(left,res); return left; |
dc437b57 |
1351 | case not_amg: |
44a8e56a |
1352 | ans=!SvOK(res); break; |
a0d0e21e |
1353 | } |
54310121 |
1354 | return boolSV(ans); |
748a9306 |
1355 | } else if (method==copy_amg) { |
1356 | if (!SvROK(res)) { |
a6006777 |
1357 | croak("Copy method did not return a reference"); |
748a9306 |
1358 | } |
1359 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1360 | } else { |
1361 | return res; |
1362 | } |
1363 | } |
1364 | } |
1365 | #endif /* OVERLOAD */ |
4e35701f |
1366 | |