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; |
55d729e4 |
89 | bool doproto = SvTYPE(gv) > SVt_NULL; |
90 | char *proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL; |
463ee0b2 |
91 | |
dc437b57 |
92 | sv_upgrade((SV*)gv, SVt_PVGV); |
55d729e4 |
93 | if (SvLEN(gv)) { |
94 | if (proto) { |
95 | SvPVX(gv) = NULL; |
96 | SvLEN(gv) = 0; |
97 | SvPOK_off(gv); |
98 | } else |
99 | Safefree(SvPVX(gv)); |
100 | } |
44a8e56a |
101 | Newz(602, gp, 1, GP); |
8990e307 |
102 | GvGP(gv) = gp_ref(gp); |
463ee0b2 |
103 | GvSV(gv) = NEWSV(72,0); |
104 | GvLINE(gv) = curcop->cop_line; |
8990e307 |
105 | GvFILEGV(gv) = curcop->cop_filegv; |
463ee0b2 |
106 | GvEGV(gv) = gv; |
107 | sv_magic((SV*)gv, (SV*)gv, '*', name, len); |
85aff577 |
108 | GvSTASH(gv) = (HV*)SvREFCNT_inc(stash); |
a0d0e21e |
109 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 |
110 | GvNAMELEN(gv) = len; |
111 | if (multi) |
a5f75d66 |
112 | GvMULTI_on(gv); |
55d729e4 |
113 | if (doproto) { /* Replicate part of newSUB here. */ |
57ff9a15 |
114 | SvIOK_off(gv); |
55d729e4 |
115 | ENTER; |
116 | start_subparse(0,0); /* Create CV in compcv. */ |
117 | GvCV(gv) = compcv; |
118 | LEAVE; |
119 | |
36fa4a92 |
120 | GvCVGEN(gv) = 0; |
55d729e4 |
121 | sub_generation++; |
122 | CvGV(GvCV(gv)) = (GV*)SvREFCNT_inc(gv); |
123 | CvFILEGV(GvCV(gv)) = curcop->cop_filegv; |
124 | CvSTASH(GvCV(gv)) = curstash; |
125 | #ifdef USE_THREADS |
126 | CvOWNER(GvCV(gv)) = 0; |
127 | New(666, CvMUTEXP(GvCV(gv)), 1, perl_mutex); |
128 | MUTEX_INIT(CvMUTEXP(GvCV(gv))); |
129 | #endif /* USE_THREADS */ |
130 | if (proto) { |
131 | sv_setpv((SV*)GvCV(gv), proto); |
132 | Safefree(proto); |
133 | } |
134 | } |
463ee0b2 |
135 | } |
136 | |
76e3520e |
137 | STATIC void |
8ac85365 |
138 | gv_init_sv(GV *gv, I32 sv_type) |
a0d0e21e |
139 | { |
140 | switch (sv_type) { |
141 | case SVt_PVIO: |
142 | (void)GvIOn(gv); |
143 | break; |
144 | case SVt_PVAV: |
145 | (void)GvAVn(gv); |
146 | break; |
147 | case SVt_PVHV: |
148 | (void)GvHVn(gv); |
149 | break; |
150 | } |
151 | } |
152 | |
79072805 |
153 | GV * |
8ac85365 |
154 | gv_fetchmeth(HV *stash, char *name, STRLEN len, I32 level) |
79072805 |
155 | { |
156 | AV* av; |
463ee0b2 |
157 | GV* topgv; |
79072805 |
158 | GV* gv; |
463ee0b2 |
159 | GV** gvp; |
748a9306 |
160 | CV* cv; |
a0d0e21e |
161 | |
162 | if (!stash) |
163 | return 0; |
44a8e56a |
164 | if ((level > 100) || (level < -100)) |
3e0ccd42 |
165 | croak("Recursive inheritance detected while looking for method '%s' in package '%s'", |
166 | name, HvNAME(stash)); |
463ee0b2 |
167 | |
463ee0b2 |
168 | DEBUG_o( deb("Looking for method %s in package %s\n",name,HvNAME(stash)) ); |
44a8e56a |
169 | |
170 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
171 | if (!gvp) |
172 | topgv = Nullgv; |
173 | else { |
174 | topgv = *gvp; |
175 | if (SvTYPE(topgv) != SVt_PVGV) |
176 | gv_init(topgv, stash, name, len, TRUE); |
177 | if (cv = GvCV(topgv)) { |
178 | /* If genuine method or valid cache entry, use it */ |
36fa4a92 |
179 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) >= sub_generation) |
7a4c00b4 |
180 | return topgv; |
44a8e56a |
181 | /* Stale cached entry: junk it */ |
182 | SvREFCNT_dec(cv); |
183 | GvCV(topgv) = cv = Nullcv; |
184 | GvCVGEN(topgv) = 0; |
748a9306 |
185 | } |
463ee0b2 |
186 | } |
79072805 |
187 | |
9607fc9c |
188 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
189 | av = (gvp && (gv = *gvp) && gv != (GV*)&sv_undef) ? GvAV(gv) : Nullav; |
190 | |
fb73857a |
191 | /* create and re-create @.*::SUPER::ISA on demand */ |
192 | if (!av || !SvMAGIC(av)) { |
9607fc9c |
193 | char* packname = HvNAME(stash); |
194 | STRLEN packlen = strlen(packname); |
195 | |
196 | if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) { |
197 | HV* basestash; |
198 | |
199 | packlen -= 7; |
200 | basestash = gv_stashpvn(packname, packlen, TRUE); |
201 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); |
202 | if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) { |
e858de61 |
203 | dTHR; /* just for SvREFCNT_dec */ |
9607fc9c |
204 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
205 | if (!gvp || !(gv = *gvp)) |
206 | croak("Cannot create %s::ISA", HvNAME(stash)); |
207 | if (SvTYPE(gv) != SVt_PVGV) |
208 | gv_init(gv, stash, "ISA", 3, TRUE); |
209 | SvREFCNT_dec(GvAV(gv)); |
210 | GvAV(gv) = (AV*)SvREFCNT_inc(av); |
211 | } |
212 | } |
213 | } |
214 | |
215 | if (av) { |
79072805 |
216 | SV** svp = AvARRAY(av); |
93965878 |
217 | /* NOTE: No support for tied ISA */ |
218 | I32 items = AvFILLp(av) + 1; |
79072805 |
219 | while (items--) { |
79072805 |
220 | SV* sv = *svp++; |
a0d0e21e |
221 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 |
222 | if (!basestash) { |
79072805 |
223 | if (dowarn) |
a0d0e21e |
224 | warn("Can't locate package %s for @%s::ISA", |
463ee0b2 |
225 | SvPVX(sv), HvNAME(stash)); |
79072805 |
226 | continue; |
227 | } |
44a8e56a |
228 | gv = gv_fetchmeth(basestash, name, len, |
229 | (level >= 0) ? level + 1 : level - 1); |
230 | if (gv) |
231 | goto gotcha; |
79072805 |
232 | } |
233 | } |
a0d0e21e |
234 | |
9607fc9c |
235 | /* if at top level, try UNIVERSAL */ |
236 | |
44a8e56a |
237 | if (level == 0 || level == -1) { |
9607fc9c |
238 | HV* lastchance; |
239 | |
dc437b57 |
240 | if (lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE)) { |
44a8e56a |
241 | if (gv = gv_fetchmeth(lastchance, name, len, |
242 | (level >= 0) ? level + 1 : level - 1)) { |
243 | gotcha: |
dc848c6f |
244 | /* |
245 | * Cache method in topgv if: |
246 | * 1. topgv has no synonyms (else inheritance crosses wires) |
247 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
248 | */ |
249 | if (topgv && |
250 | GvREFCNT(topgv) == 1 && |
251 | (cv = GvCV(gv)) && |
252 | (CvROOT(cv) || CvXSUB(cv))) |
253 | { |
44a8e56a |
254 | if (cv = GvCV(topgv)) |
255 | SvREFCNT_dec(cv); |
256 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
257 | GvCVGEN(topgv) = sub_generation; |
258 | } |
a0d0e21e |
259 | return gv; |
260 | } |
261 | } |
262 | } |
263 | |
79072805 |
264 | return 0; |
265 | } |
266 | |
267 | GV * |
8ac85365 |
268 | gv_fetchmethod(HV *stash, char *name) |
463ee0b2 |
269 | { |
dc848c6f |
270 | return gv_fetchmethod_autoload(stash, name, TRUE); |
271 | } |
272 | |
273 | GV * |
8ac85365 |
274 | gv_fetchmethod_autoload(HV *stash, char *name, I32 autoload) |
dc848c6f |
275 | { |
0f15f207 |
276 | dTHR; |
463ee0b2 |
277 | register char *nend; |
a0d0e21e |
278 | char *nsplit = 0; |
279 | GV* gv; |
463ee0b2 |
280 | |
281 | for (nend = name; *nend; nend++) { |
9607fc9c |
282 | if (*nend == '\'') |
a0d0e21e |
283 | nsplit = nend; |
9607fc9c |
284 | else if (*nend == ':' && *(nend + 1) == ':') |
285 | nsplit = ++nend; |
a0d0e21e |
286 | } |
287 | if (nsplit) { |
a0d0e21e |
288 | char *origname = name; |
289 | name = nsplit + 1; |
a0d0e21e |
290 | if (*nsplit == ':') |
291 | --nsplit; |
9607fc9c |
292 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
293 | /* ->SUPER::method should really be looked up in original stash */ |
fc36a67e |
294 | SV *tmpstr = sv_2mortal(newSVpvf("%s::SUPER", |
295 | HvNAME(curcop->cop_stash))); |
9607fc9c |
296 | stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); |
297 | DEBUG_o( deb("Treating %s as %s::%s\n", |
298 | origname, HvNAME(stash), name) ); |
4633a7c4 |
299 | } |
9607fc9c |
300 | else |
301 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); |
4633a7c4 |
302 | } |
303 | |
9607fc9c |
304 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
305 | if (!gv) { |
702887b4 |
306 | if (strEQ(name,"import")) |
dc437b57 |
307 | gv = (GV*)&sv_yes; |
dc848c6f |
308 | else if (autoload) |
54310121 |
309 | gv = gv_autoload4(stash, name, nend - name, TRUE); |
463ee0b2 |
310 | } |
dc848c6f |
311 | else if (autoload) { |
312 | CV* cv = GvCV(gv); |
09280a33 |
313 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
314 | GV* stubgv; |
315 | GV* autogv; |
316 | |
317 | if (CvANON(cv)) |
318 | stubgv = gv; |
319 | else { |
320 | stubgv = CvGV(cv); |
321 | if (GvCV(stubgv) != cv) /* orphaned import */ |
322 | stubgv = gv; |
323 | } |
324 | autogv = gv_autoload4(GvSTASH(stubgv), |
325 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
326 | if (autogv) |
327 | gv = autogv; |
328 | } |
329 | } |
44a8e56a |
330 | |
331 | return gv; |
332 | } |
333 | |
334 | GV* |
8ac85365 |
335 | gv_autoload4(HV *stash, char *name, STRLEN len, I32 method) |
44a8e56a |
336 | { |
337 | static char autoload[] = "AUTOLOAD"; |
338 | static STRLEN autolen = 8; |
339 | GV* gv; |
340 | CV* cv; |
341 | HV* varstash; |
342 | GV* vargv; |
343 | SV* varsv; |
344 | |
345 | if (len == autolen && strnEQ(name, autoload, autolen)) |
346 | return Nullgv; |
dc848c6f |
347 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
348 | return Nullgv; |
349 | cv = GvCV(gv); |
350 | |
351 | /* |
352 | * Inheriting AUTOLOAD for non-methods works ... for now. |
353 | */ |
354 | if (dowarn && !method && (GvCVGEN(gv) || GvSTASH(gv) != stash)) |
355 | warn( |
356 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
357 | HvNAME(stash), (int)len, name); |
44a8e56a |
358 | |
359 | /* |
360 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
361 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
362 | * use that, but for lack of anything better we will use the sub's |
363 | * original package to look up $AUTOLOAD. |
364 | */ |
365 | varstash = GvSTASH(CvGV(cv)); |
366 | vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); |
367 | if (!isGV(vargv)) |
368 | gv_init(vargv, varstash, autoload, autolen, FALSE); |
369 | varsv = GvSV(vargv); |
370 | sv_setpv(varsv, HvNAME(stash)); |
371 | sv_catpvn(varsv, "::", 2); |
372 | sv_catpvn(varsv, name, len); |
373 | SvTAINTED_off(varsv); |
a0d0e21e |
374 | return gv; |
375 | } |
376 | |
377 | HV* |
8ac85365 |
378 | gv_stashpv(char *name, I32 create) |
a0d0e21e |
379 | { |
dc437b57 |
380 | return gv_stashpvn(name, strlen(name), create); |
381 | } |
382 | |
383 | HV* |
8ac85365 |
384 | gv_stashpvn(char *name, U32 namelen, I32 create) |
dc437b57 |
385 | { |
46fc3d4c |
386 | char smallbuf[256]; |
387 | char *tmpbuf; |
a0d0e21e |
388 | HV *stash; |
389 | GV *tmpgv; |
dc437b57 |
390 | |
46fc3d4c |
391 | if (namelen + 3 < sizeof smallbuf) |
392 | tmpbuf = smallbuf; |
393 | else |
394 | New(606, tmpbuf, namelen + 3, char); |
dc437b57 |
395 | Copy(name,tmpbuf,namelen,char); |
396 | tmpbuf[namelen++] = ':'; |
397 | tmpbuf[namelen++] = ':'; |
398 | tmpbuf[namelen] = '\0'; |
46fc3d4c |
399 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
400 | if (tmpbuf != smallbuf) |
401 | Safefree(tmpbuf); |
a0d0e21e |
402 | if (!tmpgv) |
403 | return 0; |
404 | if (!GvHV(tmpgv)) |
405 | GvHV(tmpgv) = newHV(); |
406 | stash = GvHV(tmpgv); |
407 | if (!HvNAME(stash)) |
408 | HvNAME(stash) = savepv(name); |
409 | return stash; |
463ee0b2 |
410 | } |
411 | |
a0d0e21e |
412 | HV* |
8ac85365 |
413 | gv_stashsv(SV *sv, I32 create) |
a0d0e21e |
414 | { |
dc437b57 |
415 | register char *ptr; |
416 | STRLEN len; |
417 | ptr = SvPV(sv,len); |
418 | return gv_stashpvn(ptr, len, create); |
a0d0e21e |
419 | } |
420 | |
421 | |
463ee0b2 |
422 | GV * |
8ac85365 |
423 | gv_fetchpv(char *nambeg, I32 add, I32 sv_type) |
79072805 |
424 | { |
11343788 |
425 | dTHR; |
463ee0b2 |
426 | register char *name = nambeg; |
427 | register GV *gv = 0; |
79072805 |
428 | GV**gvp; |
79072805 |
429 | I32 len; |
430 | register char *namend; |
463ee0b2 |
431 | HV *stash = 0; |
9607fc9c |
432 | U32 add_gvflags = 0; |
79072805 |
433 | |
c07a80fd |
434 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
435 | name++; |
436 | |
79072805 |
437 | for (namend = name; *namend; namend++) { |
463ee0b2 |
438 | if ((*namend == '\'' && namend[1]) || |
439 | (*namend == ':' && namend[1] == ':')) |
440 | { |
463ee0b2 |
441 | if (!stash) |
442 | stash = defstash; |
dc437b57 |
443 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e |
444 | return Nullgv; |
463ee0b2 |
445 | |
85e6fe83 |
446 | len = namend - name; |
447 | if (len > 0) { |
3c78fafa |
448 | char smallbuf[256]; |
62b57502 |
449 | char *tmpbuf; |
62b57502 |
450 | |
3c78fafa |
451 | if (len + 3 < sizeof smallbuf) |
452 | tmpbuf = smallbuf; |
62b57502 |
453 | else |
454 | New(601, tmpbuf, len+3, char); |
a0d0e21e |
455 | Copy(name, tmpbuf, len, char); |
456 | tmpbuf[len++] = ':'; |
457 | tmpbuf[len++] = ':'; |
458 | tmpbuf[len] = '\0'; |
463ee0b2 |
459 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
6fa846a0 |
460 | gv = gvp ? *gvp : Nullgv; |
461 | if (gv && gv != (GV*)&sv_undef) { |
462 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 |
463 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 |
464 | else |
465 | GvMULTI_on(gv); |
466 | } |
3c78fafa |
467 | if (tmpbuf != smallbuf) |
62b57502 |
468 | Safefree(tmpbuf); |
6fa846a0 |
469 | if (!gv || gv == (GV*)&sv_undef) |
a0d0e21e |
470 | return Nullgv; |
85e6fe83 |
471 | |
463ee0b2 |
472 | if (!(stash = GvHV(gv))) |
473 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
474 | |
463ee0b2 |
475 | if (!HvNAME(stash)) |
a0d0e21e |
476 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 |
477 | } |
478 | |
479 | if (*namend == ':') |
480 | namend++; |
481 | namend++; |
482 | name = namend; |
483 | if (!*name) |
dc437b57 |
484 | return gv ? gv : (GV*)*hv_fetch(defstash, "main::", 6, TRUE); |
79072805 |
485 | } |
79072805 |
486 | } |
a0d0e21e |
487 | len = namend - name; |
488 | if (!len) |
489 | len = 1; |
463ee0b2 |
490 | |
491 | /* No stash in name, so see how we can default */ |
492 | |
493 | if (!stash) { |
494 | if (isIDFIRST(*name)) { |
9607fc9c |
495 | bool global = FALSE; |
496 | |
463ee0b2 |
497 | if (isUPPER(*name)) { |
498 | if (*name > 'I') { |
499 | if (*name == 'S' && ( |
500 | strEQ(name, "SIG") || |
501 | strEQ(name, "STDIN") || |
502 | strEQ(name, "STDOUT") || |
503 | strEQ(name, "STDERR") )) |
504 | global = TRUE; |
505 | } |
506 | else if (*name > 'E') { |
507 | if (*name == 'I' && strEQ(name, "INC")) |
508 | global = TRUE; |
509 | } |
510 | else if (*name > 'A') { |
511 | if (*name == 'E' && strEQ(name, "ENV")) |
512 | global = TRUE; |
513 | } |
514 | else if (*name == 'A' && ( |
515 | strEQ(name, "ARGV") || |
516 | strEQ(name, "ARGVOUT") )) |
517 | global = TRUE; |
518 | } |
519 | else if (*name == '_' && !name[1]) |
520 | global = TRUE; |
9607fc9c |
521 | |
463ee0b2 |
522 | if (global) |
523 | stash = defstash; |
85e6fe83 |
524 | else if ((COP*)curcop == &compiling) { |
a0d0e21e |
525 | stash = curstash; |
748a9306 |
526 | if (add && (hints & HINT_STRICT_VARS) && |
527 | sv_type != SVt_PVCV && |
528 | sv_type != SVt_PVGV && |
4633a7c4 |
529 | sv_type != SVt_PVFM && |
c07a80fd |
530 | sv_type != SVt_PVIO && |
377b8fbc |
531 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
748a9306 |
532 | { |
4633a7c4 |
533 | gvp = (GV**)hv_fetch(stash,name,len,0); |
534 | if (!gvp || |
a5f75d66 |
535 | *gvp == (GV*)&sv_undef || |
536 | SvTYPE(*gvp) != SVt_PVGV) |
537 | { |
4633a7c4 |
538 | stash = 0; |
a5f75d66 |
539 | } |
540 | else if (sv_type == SVt_PV && !GvIMPORTED_SV(*gvp) || |
541 | sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp) || |
542 | sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp) ) |
4633a7c4 |
543 | { |
a5f75d66 |
544 | warn("Variable \"%c%s\" is not imported", |
4633a7c4 |
545 | sv_type == SVt_PVAV ? '@' : |
546 | sv_type == SVt_PVHV ? '%' : '$', |
547 | name); |
8ebc5c01 |
548 | if (GvCVu(*gvp)) |
4633a7c4 |
549 | warn("(Did you mean &%s instead?)\n", name); |
a0d0e21e |
550 | stash = 0; |
4633a7c4 |
551 | } |
a0d0e21e |
552 | } |
85e6fe83 |
553 | } |
463ee0b2 |
554 | else |
555 | stash = curcop->cop_stash; |
556 | } |
557 | else |
558 | stash = defstash; |
559 | } |
560 | |
561 | /* By this point we should have a stash and a name */ |
562 | |
a0d0e21e |
563 | if (!stash) { |
93233ece |
564 | if (!add) |
a0d0e21e |
565 | return Nullgv; |
0f303493 |
566 | if (add & ~GV_ADDMULTI) { |
2c4aebbd |
567 | char sv_type_char = ((sv_type == SVt_PV) ? '$' |
568 | : (sv_type == SVt_PVAV) ? '@' |
569 | : (sv_type == SVt_PVHV) ? '%' |
570 | : 0); |
571 | if (sv_type_char) |
572 | warn("Global symbol \"%c%s\" requires explicit package name", |
573 | sv_type_char, name); |
574 | else |
93233ece |
575 | warn("Global symbol \"%s\" requires explicit package name", |
576 | name); |
a0d0e21e |
577 | } |
93233ece |
578 | ++error_count; |
579 | stash = curstash ? curstash : defstash; /* avoid core dumps */ |
580 | add_gvflags = ((sv_type == SVt_PV) ? GVf_IMPORTED_SV |
581 | : (sv_type == SVt_PVAV) ? GVf_IMPORTED_AV |
582 | : (sv_type == SVt_PVHV) ? GVf_IMPORTED_HV |
583 | : 0); |
a0d0e21e |
584 | } |
585 | |
586 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
587 | return Nullgv; |
588 | |
79072805 |
589 | gvp = (GV**)hv_fetch(stash,name,len,add); |
590 | if (!gvp || *gvp == (GV*)&sv_undef) |
591 | return Nullgv; |
592 | gv = *gvp; |
593 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
594 | if (add) { |
a5f75d66 |
595 | GvMULTI_on(gv); |
a0d0e21e |
596 | gv_init_sv(gv, sv_type); |
597 | } |
79072805 |
598 | return gv; |
55d729e4 |
599 | } else if (add & GV_NOINIT) { |
600 | return gv; |
79072805 |
601 | } |
93a17b20 |
602 | |
603 | /* Adding a new symbol */ |
604 | |
55d729e4 |
605 | if (add & GV_ADDWARN) |
a0d0e21e |
606 | warn("Had to create %s unexpectedly", nambeg); |
55d729e4 |
607 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e |
608 | gv_init_sv(gv, sv_type); |
9607fc9c |
609 | GvFLAGS(gv) |= add_gvflags; |
93a17b20 |
610 | |
611 | /* set up magic where warranted */ |
612 | switch (*name) { |
a0d0e21e |
613 | case 'A': |
614 | if (strEQ(name, "ARGV")) { |
615 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
616 | } |
617 | break; |
618 | |
ed6116ce |
619 | case 'a': |
620 | case 'b': |
621 | if (len == 1) |
a5f75d66 |
622 | GvMULTI_on(gv); |
ed6116ce |
623 | break; |
a0d0e21e |
624 | case 'E': |
625 | if (strnEQ(name, "EXPORT", 6)) |
a5f75d66 |
626 | GvMULTI_on(gv); |
a0d0e21e |
627 | break; |
463ee0b2 |
628 | case 'I': |
629 | if (strEQ(name, "ISA")) { |
630 | AV* av = GvAVn(gv); |
a5f75d66 |
631 | GvMULTI_on(gv); |
a0d0e21e |
632 | sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0); |
93965878 |
633 | /* NOTE: No support for tied ISA */ |
55d729e4 |
634 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
635 | && AvFILLp(av) == -1) |
85e6fe83 |
636 | { |
a0d0e21e |
637 | char *pname; |
638 | av_push(av, newSVpv(pname = "NDBM_File",0)); |
dc437b57 |
639 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e |
640 | av_push(av, newSVpv(pname = "DB_File",0)); |
dc437b57 |
641 | gv_stashpvn(pname, 7, TRUE); |
a0d0e21e |
642 | av_push(av, newSVpv(pname = "GDBM_File",0)); |
dc437b57 |
643 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e |
644 | av_push(av, newSVpv(pname = "SDBM_File",0)); |
dc437b57 |
645 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e |
646 | av_push(av, newSVpv(pname = "ODBM_File",0)); |
dc437b57 |
647 | gv_stashpvn(pname, 9, TRUE); |
85e6fe83 |
648 | } |
463ee0b2 |
649 | } |
650 | break; |
a0d0e21e |
651 | #ifdef OVERLOAD |
652 | case 'O': |
653 | if (strEQ(name, "OVERLOAD")) { |
654 | HV* hv = GvHVn(gv); |
a5f75d66 |
655 | GvMULTI_on(gv); |
ea0efc06 |
656 | hv_magic(hv, gv, 'A'); |
a0d0e21e |
657 | } |
658 | break; |
659 | #endif /* OVERLOAD */ |
93a17b20 |
660 | case 'S': |
661 | if (strEQ(name, "SIG")) { |
662 | HV *hv; |
dc437b57 |
663 | I32 i; |
93a17b20 |
664 | siggv = gv; |
a5f75d66 |
665 | GvMULTI_on(siggv); |
93a17b20 |
666 | hv = GvHVn(siggv); |
667 | hv_magic(hv, siggv, 'S'); |
dc437b57 |
668 | for(i=1;sig_name[i];i++) { |
669 | SV ** init; |
670 | init=hv_fetch(hv,sig_name[i],strlen(sig_name[i]),1); |
671 | if(init) |
672 | sv_setsv(*init,&sv_undef); |
673 | psig_ptr[i] = 0; |
674 | psig_name[i] = 0; |
675 | } |
93a17b20 |
676 | } |
677 | break; |
678 | |
679 | case '&': |
463ee0b2 |
680 | if (len > 1) |
681 | break; |
93a17b20 |
682 | ampergv = gv; |
683 | sawampersand = TRUE; |
a0d0e21e |
684 | goto ro_magicalize; |
93a17b20 |
685 | |
686 | case '`': |
463ee0b2 |
687 | if (len > 1) |
688 | break; |
93a17b20 |
689 | leftgv = gv; |
690 | sawampersand = TRUE; |
a0d0e21e |
691 | goto ro_magicalize; |
93a17b20 |
692 | |
693 | case '\'': |
463ee0b2 |
694 | if (len > 1) |
695 | break; |
93a17b20 |
696 | rightgv = gv; |
697 | sawampersand = TRUE; |
a0d0e21e |
698 | goto ro_magicalize; |
93a17b20 |
699 | |
700 | case ':': |
463ee0b2 |
701 | if (len > 1) |
702 | break; |
93a17b20 |
703 | sv_setpv(GvSV(gv),chopset); |
704 | goto magicalize; |
705 | |
ff0cee69 |
706 | case '?': |
707 | if (len > 1) |
708 | break; |
709 | #ifdef COMPLEX_STATUS |
710 | sv_upgrade(GvSV(gv), SVt_PVLV); |
711 | #endif |
712 | goto magicalize; |
713 | |
067391ea |
714 | case '!': |
4318d5a0 |
715 | if (len > 1) |
067391ea |
716 | break; |
4318d5a0 |
717 | if (sv_type > SVt_PV && curcop != &compiling) { |
067391ea |
718 | HV* stash = gv_stashpvn("Errno",5,FALSE); |
719 | if(!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { |
720 | dSP; |
721 | PUTBACK; |
722 | perl_require_pv("Errno.pm"); |
723 | SPAGAIN; |
724 | stash = gv_stashpvn("Errno",5,FALSE); |
725 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) |
1d2dff63 |
726 | croak("Can't use %%! because Errno.pm is not available"); |
067391ea |
727 | } |
728 | } |
729 | goto magicalize; |
93a17b20 |
730 | case '#': |
a0d0e21e |
731 | case '*': |
732 | if (dowarn && len == 1 && sv_type == SVt_PV) |
733 | warn("Use of $%s is deprecated", name); |
734 | /* FALL THROUGH */ |
735 | case '[': |
93a17b20 |
736 | case '^': |
737 | case '~': |
738 | case '=': |
739 | case '-': |
740 | case '%': |
741 | case '.': |
93a17b20 |
742 | case '(': |
743 | case ')': |
744 | case '<': |
745 | case '>': |
746 | case ',': |
747 | case '\\': |
748 | case '/': |
93a17b20 |
749 | case '|': |
748a9306 |
750 | case '\001': |
93a17b20 |
751 | case '\004': |
ad8898e0 |
752 | case '\005': |
748a9306 |
753 | case '\006': |
a0d0e21e |
754 | case '\010': |
ad8898e0 |
755 | case '\017': |
93a17b20 |
756 | case '\t': |
757 | case '\020': |
758 | case '\024': |
759 | case '\027': |
463ee0b2 |
760 | if (len > 1) |
761 | break; |
762 | goto magicalize; |
763 | |
a0d0e21e |
764 | case '+': |
463ee0b2 |
765 | case '1': |
766 | case '2': |
767 | case '3': |
768 | case '4': |
769 | case '5': |
770 | case '6': |
771 | case '7': |
772 | case '8': |
773 | case '9': |
fb73857a |
774 | case '\023': |
a0d0e21e |
775 | ro_magicalize: |
776 | SvREADONLY_on(GvSV(gv)); |
93a17b20 |
777 | magicalize: |
463ee0b2 |
778 | sv_magic(GvSV(gv), (SV*)gv, 0, name, len); |
93a17b20 |
779 | break; |
780 | |
781 | case '\014': |
463ee0b2 |
782 | if (len > 1) |
783 | break; |
93a17b20 |
784 | sv_setpv(GvSV(gv),"\f"); |
785 | formfeed = GvSV(gv); |
786 | break; |
787 | case ';': |
463ee0b2 |
788 | if (len > 1) |
789 | break; |
93a17b20 |
790 | sv_setpv(GvSV(gv),"\034"); |
791 | break; |
463ee0b2 |
792 | case ']': |
793 | if (len == 1) { |
f86702cc |
794 | SV *sv = GvSV(gv); |
93a17b20 |
795 | sv_upgrade(sv, SVt_PVNV); |
a0d0e21e |
796 | sv_setpv(sv, patchlevel); |
f86702cc |
797 | (void)sv_2nv(sv); |
798 | SvREADONLY_on(sv); |
93a17b20 |
799 | } |
800 | break; |
79072805 |
801 | } |
93a17b20 |
802 | return gv; |
79072805 |
803 | } |
804 | |
805 | void |
8ac85365 |
806 | gv_fullname3(SV *sv, GV *gv, char *prefix) |
79072805 |
807 | { |
808 | HV *hv = GvSTASH(gv); |
f967eb5f |
809 | if (!hv) { |
810 | SvOK_off(sv); |
79072805 |
811 | return; |
f967eb5f |
812 | } |
813 | sv_setpv(sv, prefix ? prefix : ""); |
79072805 |
814 | sv_catpv(sv,HvNAME(hv)); |
463ee0b2 |
815 | sv_catpvn(sv,"::", 2); |
79072805 |
816 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
817 | } |
818 | |
819 | void |
8ac85365 |
820 | gv_efullname3(SV *sv, GV *gv, char *prefix) |
79072805 |
821 | { |
f967eb5f |
822 | GV *egv = GvEGV(gv); |
748a9306 |
823 | if (!egv) |
824 | egv = gv; |
f6aff53a |
825 | gv_fullname3(sv, egv, prefix); |
826 | } |
827 | |
828 | /* XXX compatibility with versions <= 5.003. */ |
829 | void |
8ac85365 |
830 | gv_fullname(SV *sv, GV *gv) |
f6aff53a |
831 | { |
832 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
833 | } |
834 | |
835 | /* XXX compatibility with versions <= 5.003. */ |
836 | void |
8ac85365 |
837 | gv_efullname(SV *sv, GV *gv) |
f6aff53a |
838 | { |
839 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
79072805 |
840 | } |
841 | |
842 | IO * |
8ac85365 |
843 | newIO(void) |
79072805 |
844 | { |
11343788 |
845 | dTHR; |
79072805 |
846 | IO *io; |
8990e307 |
847 | GV *iogv; |
848 | |
849 | io = (IO*)NEWSV(0,0); |
a0d0e21e |
850 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 |
851 | SvREFCNT(io) = 1; |
852 | SvOBJECT_on(io); |
c9de509e |
853 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
854 | if (!iogv) |
855 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
8990e307 |
856 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 |
857 | return io; |
858 | } |
859 | |
860 | void |
8ac85365 |
861 | gv_check(HV *stash) |
79072805 |
862 | { |
11343788 |
863 | dTHR; |
79072805 |
864 | register HE *entry; |
865 | register I32 i; |
866 | register GV *gv; |
463ee0b2 |
867 | HV *hv; |
a0d0e21e |
868 | GV *filegv; |
463ee0b2 |
869 | |
8990e307 |
870 | if (!HvARRAY(stash)) |
871 | return; |
a0d0e21e |
872 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
dc437b57 |
873 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
874 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
875 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv)) |
a0d0e21e |
876 | { |
877 | if (hv != defstash) |
878 | gv_check(hv); /* nested package */ |
879 | } |
dc437b57 |
880 | else if (isALPHA(*HeKEY(entry))) { |
881 | gv = (GV*)HeVAL(entry); |
55d729e4 |
882 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 |
883 | continue; |
884 | curcop->cop_line = GvLINE(gv); |
a0d0e21e |
885 | filegv = GvFILEGV(gv); |
886 | curcop->cop_filegv = filegv; |
a5f75d66 |
887 | if (filegv && GvMULTI(filegv)) /* Filename began with slash */ |
8990e307 |
888 | continue; |
dc437b57 |
889 | warn("Name \"%s::%s\" used only once: possible typo", |
a0d0e21e |
890 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 |
891 | } |
79072805 |
892 | } |
893 | } |
894 | } |
895 | |
896 | GV * |
8ac85365 |
897 | newGVgen(char *pack) |
79072805 |
898 | { |
46fc3d4c |
899 | return gv_fetchpv(form("%s::_GEN_%ld", pack, (long)gensym++), |
900 | TRUE, SVt_PVGV); |
79072805 |
901 | } |
902 | |
903 | /* hopefully this is only called on local symbol table entries */ |
904 | |
905 | GP* |
8ac85365 |
906 | gp_ref(GP *gp) |
79072805 |
907 | { |
908 | gp->gp_refcnt++; |
44a8e56a |
909 | if (gp->gp_cv) { |
910 | if (gp->gp_cvgen) { |
911 | /* multi-named GPs cannot be used for method cache */ |
912 | SvREFCNT_dec(gp->gp_cv); |
913 | gp->gp_cv = Nullcv; |
914 | gp->gp_cvgen = 0; |
915 | } |
916 | else { |
917 | /* Adding a new name to a subroutine invalidates method cache */ |
918 | sub_generation++; |
919 | } |
920 | } |
79072805 |
921 | return gp; |
79072805 |
922 | } |
923 | |
924 | void |
8ac85365 |
925 | gp_free(GV *gv) |
79072805 |
926 | { |
79072805 |
927 | GP* gp; |
377b8fbc |
928 | CV* cv; |
79072805 |
929 | |
930 | if (!gv || !(gp = GvGP(gv))) |
931 | return; |
932 | if (gp->gp_refcnt == 0) { |
933 | warn("Attempt to free unreferenced glob pointers"); |
934 | return; |
935 | } |
44a8e56a |
936 | if (gp->gp_cv) { |
937 | /* Deleting the name of a subroutine invalidates method cache */ |
938 | sub_generation++; |
939 | } |
748a9306 |
940 | if (--gp->gp_refcnt > 0) { |
941 | if (gp->gp_egv == gv) |
942 | gp->gp_egv = 0; |
79072805 |
943 | return; |
748a9306 |
944 | } |
79072805 |
945 | |
8990e307 |
946 | SvREFCNT_dec(gp->gp_sv); |
947 | SvREFCNT_dec(gp->gp_av); |
948 | SvREFCNT_dec(gp->gp_hv); |
377b8fbc |
949 | SvREFCNT_dec(gp->gp_io); |
a6006777 |
950 | SvREFCNT_dec(gp->gp_cv); |
748a9306 |
951 | SvREFCNT_dec(gp->gp_form); |
952 | |
79072805 |
953 | Safefree(gp); |
954 | GvGP(gv) = 0; |
955 | } |
956 | |
957 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) |
958 | #define MICROPORT |
959 | #endif |
960 | |
961 | #ifdef MICROPORT /* Microport 2.4 hack */ |
962 | AV *GvAVn(gv) |
963 | register GV *gv; |
964 | { |
965 | if (GvGP(gv)->gp_av) |
966 | return GvGP(gv)->gp_av; |
967 | else |
968 | return GvGP(gv_AVadd(gv))->gp_av; |
969 | } |
970 | |
971 | HV *GvHVn(gv) |
972 | register GV *gv; |
973 | { |
974 | if (GvGP(gv)->gp_hv) |
975 | return GvGP(gv)->gp_hv; |
976 | else |
977 | return GvGP(gv_HVadd(gv))->gp_hv; |
978 | } |
979 | #endif /* Microport 2.4 hack */ |
a0d0e21e |
980 | |
981 | #ifdef OVERLOAD |
982 | /* Updates and caches the CV's */ |
983 | |
984 | bool |
8ac85365 |
985 | Gv_AMupdate(HV *stash) |
a0d0e21e |
986 | { |
11343788 |
987 | dTHR; |
a0d0e21e |
988 | GV** gvp; |
989 | HV* hv; |
990 | GV* gv; |
991 | CV* cv; |
992 | MAGIC* mg=mg_find((SV*)stash,'c'); |
8ac85365 |
993 | AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
a6006777 |
994 | AMT amt; |
a0d0e21e |
995 | |
e7ea3e70 |
996 | if (mg && amtp->was_ok_am == amagic_generation |
997 | && amtp->was_ok_sub == sub_generation) |
a6006777 |
998 | return AMT_AMAGIC(amtp); |
999 | if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */ |
748a9306 |
1000 | int i; |
a6006777 |
1001 | for (i=1; i<NofAMmeth; i++) { |
748a9306 |
1002 | if (amtp->table[i]) { |
1003 | SvREFCNT_dec(amtp->table[i]); |
1004 | } |
1005 | } |
1006 | } |
a0d0e21e |
1007 | sv_unmagic((SV*)stash, 'c'); |
1008 | |
1009 | DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) ); |
1010 | |
a6006777 |
1011 | amt.was_ok_am = amagic_generation; |
1012 | amt.was_ok_sub = sub_generation; |
1013 | amt.fallback = AMGfallNO; |
1014 | amt.flags = 0; |
1015 | |
1016 | #ifdef OVERLOAD_VIA_HASH |
1017 | gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */ |
a0d0e21e |
1018 | if (gvp && ((gv = *gvp) != (GV*)&sv_undef && (hv = GvHV(gv)))) { |
1019 | int filled=0; |
1020 | int i; |
1021 | char *cp; |
a0d0e21e |
1022 | SV* sv; |
1023 | SV** svp; |
a0d0e21e |
1024 | |
1025 | /* Work with "fallback" key, which we assume to be first in AMG_names */ |
1026 | |
a6006777 |
1027 | if (( cp = (char *)AMG_names[0] ) && |
1028 | (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) { |
a0d0e21e |
1029 | if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1030 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
1031 | } |
a6006777 |
1032 | for (i = 1; i < NofAMmeth; i++) { |
1033 | cv = 0; |
1034 | cp = (char *)AMG_names[i]; |
1035 | |
1036 | svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE); |
dc437b57 |
1037 | if (svp && ((sv = *svp) != &sv_undef)) { |
a0d0e21e |
1038 | switch (SvTYPE(sv)) { |
1039 | default: |
1040 | if (!SvROK(sv)) { |
1041 | if (!SvOK(sv)) break; |
748a9306 |
1042 | gv = gv_fetchmethod(stash, SvPV(sv, na)); |
a0d0e21e |
1043 | if (gv) cv = GvCV(gv); |
1044 | break; |
1045 | } |
1046 | cv = (CV*)SvRV(sv); |
1047 | if (SvTYPE(cv) == SVt_PVCV) |
1048 | break; |
1049 | /* FALL THROUGH */ |
1050 | case SVt_PVHV: |
1051 | case SVt_PVAV: |
a6006777 |
1052 | croak("Not a subroutine reference in overload table"); |
a0d0e21e |
1053 | return FALSE; |
1054 | case SVt_PVCV: |
8ebc5c01 |
1055 | cv = (CV*)sv; |
1056 | break; |
a0d0e21e |
1057 | case SVt_PVGV: |
8ebc5c01 |
1058 | if (!(cv = GvCVu((GV*)sv))) |
1059 | cv = sv_2cv(sv, &stash, &gv, TRUE); |
1060 | break; |
a0d0e21e |
1061 | } |
1062 | if (cv) filled=1; |
1063 | else { |
a6006777 |
1064 | croak("Method for operation %s not found in package %.256s during blessing\n", |
a0d0e21e |
1065 | cp,HvNAME(stash)); |
1066 | return FALSE; |
1067 | } |
1068 | } |
a6006777 |
1069 | #else |
1070 | { |
1071 | int filled = 0; |
1072 | int i; |
9607fc9c |
1073 | const char *cp; |
a6006777 |
1074 | SV* sv = NULL; |
1075 | SV** svp; |
1076 | |
1077 | /* Work with "fallback" key, which we assume to be first in AMG_names */ |
1078 | |
9607fc9c |
1079 | if ( cp = AMG_names[0] ) { |
a6006777 |
1080 | /* Try to find via inheritance. */ |
774d564b |
1081 | gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */ |
a6006777 |
1082 | if (gv) sv = GvSV(gv); |
1083 | |
774d564b |
1084 | if (!gv) goto no_table; |
a6006777 |
1085 | else if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1086 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
1087 | } |
1088 | |
1089 | for (i = 1; i < NofAMmeth; i++) { |
46fc3d4c |
1090 | SV *cookie = sv_2mortal(newSVpvf("(%s", cp = AMG_names[i])); |
44a8e56a |
1091 | DEBUG_o( deb("Checking overloading of `%s' in package `%.256s'\n", |
1092 | cp, HvNAME(stash)) ); |
46fc3d4c |
1093 | /* don't fill the cache while looking up! */ |
1094 | gv = gv_fetchmeth(stash, SvPVX(cookie), SvCUR(cookie), -1); |
1095 | cv = 0; |
44a8e56a |
1096 | if(gv && (cv = GvCV(gv))) { |
44a8e56a |
1097 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
1098 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { |
1099 | /* GvSV contains the name of the method. */ |
1100 | GV *ngv; |
1101 | |
1102 | DEBUG_o( deb("Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", |
1103 | SvPV(GvSV(gv), na), cp, HvNAME(stash)) ); |
dc848c6f |
1104 | if (!SvPOK(GvSV(gv)) |
1105 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), |
1106 | FALSE))) |
1107 | { |
44a8e56a |
1108 | /* Can be an import stub (created by `can'). */ |
1109 | if (GvCVGEN(gv)) { |
1110 | croak("Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", |
1111 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1112 | cp, HvNAME(stash)); |
1113 | } else |
1114 | croak("Cannot resolve method `%.256s' overloading `%s' in package `%.256s'", |
1115 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1116 | cp, HvNAME(stash)); |
1117 | } |
dc848c6f |
1118 | cv = GvCV(gv = ngv); |
44a8e56a |
1119 | } |
1120 | DEBUG_o( deb("Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", |
1121 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), |
1122 | GvNAME(CvGV(cv))) ); |
1123 | filled = 1; |
1124 | } |
a6006777 |
1125 | #endif |
1126 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e |
1127 | } |
a0d0e21e |
1128 | if (filled) { |
a6006777 |
1129 | AMT_AMAGIC_on(&amt); |
1130 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT)); |
a0d0e21e |
1131 | return TRUE; |
1132 | } |
1133 | } |
a6006777 |
1134 | /* Here we have no table: */ |
774d564b |
1135 | no_table: |
a6006777 |
1136 | AMT_AMAGIC_off(&amt); |
1137 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1138 | return FALSE; |
1139 | } |
1140 | |
a0d0e21e |
1141 | SV* |
8ac85365 |
1142 | amagic_call(SV *left, SV *right, int method, int flags) |
a0d0e21e |
1143 | { |
11343788 |
1144 | dTHR; |
a0d0e21e |
1145 | MAGIC *mg; |
1146 | CV *cv; |
1147 | CV **cvp=NULL, **ocvp=NULL; |
1148 | AMT *amtp, *oamtp; |
1149 | int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; |
748a9306 |
1150 | int postpr=0, inc_dec_ass=0, assignshift=assign?1:0; |
a0d0e21e |
1151 | HV* stash; |
1152 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
1153 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c')) |
a6006777 |
1154 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1155 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1156 | : (CV **) NULL)) |
748a9306 |
1157 | && ((cv = cvp[off=method+assignshift]) |
1158 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1159 | * usual method */ |
1160 | (fl = 1, cv = cvp[off=method])))) { |
a0d0e21e |
1161 | lr = -1; /* Call method for left argument */ |
1162 | } else { |
1163 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1164 | int logic; |
1165 | |
1166 | /* look for substituted methods */ |
1167 | switch (method) { |
1168 | case inc_amg: |
748a9306 |
1169 | if (((cv = cvp[off=add_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e |
1170 | || ((cv = cvp[off=add_amg]) && (postpr=1))) { |
1171 | right = &sv_yes; lr = -1; assign = 1; |
1172 | } |
1173 | break; |
1174 | case dec_amg: |
748a9306 |
1175 | if (((cv = cvp[off=subtr_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e |
1176 | || ((cv = cvp[off=subtr_amg]) && (postpr=1))) { |
1177 | right = &sv_yes; lr = -1; assign = 1; |
1178 | } |
1179 | break; |
1180 | case bool__amg: |
1181 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1182 | break; |
1183 | case numer_amg: |
1184 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1185 | break; |
1186 | case string_amg: |
1187 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1188 | break; |
dc437b57 |
1189 | case not_amg: |
1190 | (void)((cv = cvp[off=bool__amg]) |
1191 | || (cv = cvp[off=numer_amg]) |
1192 | || (cv = cvp[off=string_amg])); |
1193 | postpr = 1; |
1194 | break; |
748a9306 |
1195 | case copy_amg: |
1196 | { |
76e3520e |
1197 | /* |
1198 | * SV* ref causes confusion with the interpreter variable of |
1199 | * the same name |
1200 | */ |
1201 | SV* tmpRef=SvRV(left); |
1202 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e |
1203 | /* |
1204 | * Just to be extra cautious. Maybe in some |
1205 | * additional cases sv_setsv is safe, too. |
1206 | */ |
76e3520e |
1207 | SV* newref = newSVsv(tmpRef); |
748a9306 |
1208 | SvOBJECT_on(newref); |
76e3520e |
1209 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef)); |
748a9306 |
1210 | return newref; |
1211 | } |
1212 | } |
1213 | break; |
a0d0e21e |
1214 | case abs_amg: |
748a9306 |
1215 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1216 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 |
1217 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1218 | if (off1==lt_amg) { |
748a9306 |
1219 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1220 | lt_amg,AMGf_noright); |
1221 | logic = SvTRUE(lessp); |
1222 | } else { |
748a9306 |
1223 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1224 | ncmp_amg,AMGf_noright); |
1225 | logic = (SvNV(lessp) < 0); |
1226 | } |
1227 | if (logic) { |
1228 | if (off==subtr_amg) { |
1229 | right = left; |
748a9306 |
1230 | left = nullsv; |
a0d0e21e |
1231 | lr = 1; |
1232 | } |
1233 | } else { |
1234 | return left; |
1235 | } |
1236 | } |
1237 | break; |
1238 | case neg_amg: |
1239 | if (cv = cvp[off=subtr_amg]) { |
1240 | right = left; |
1241 | left = sv_2mortal(newSViv(0)); |
1242 | lr = 1; |
1243 | } |
1244 | break; |
1245 | default: |
1246 | goto not_found; |
1247 | } |
1248 | if (!cv) goto not_found; |
1249 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
1250 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c')) |
a6006777 |
1251 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1252 | ? (amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1253 | : (CV **) NULL)) |
a0d0e21e |
1254 | && (cv = cvp[off=method])) { /* Method for right |
1255 | * argument found */ |
1256 | lr=1; |
748a9306 |
1257 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
4633a7c4 |
1258 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1259 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1260 | && !(flags & AMGf_unary)) { |
1261 | /* We look for substitution for |
1262 | * comparison operations and |
fc36a67e |
1263 | * concatenation */ |
a0d0e21e |
1264 | if (method==concat_amg || method==concat_ass_amg |
1265 | || method==repeat_amg || method==repeat_ass_amg) { |
1266 | return NULL; /* Delegate operation to string conversion */ |
1267 | } |
1268 | off = -1; |
1269 | switch (method) { |
1270 | case lt_amg: |
1271 | case le_amg: |
1272 | case gt_amg: |
1273 | case ge_amg: |
1274 | case eq_amg: |
1275 | case ne_amg: |
1276 | postpr = 1; off=ncmp_amg; break; |
1277 | case slt_amg: |
1278 | case sle_amg: |
1279 | case sgt_amg: |
1280 | case sge_amg: |
1281 | case seq_amg: |
1282 | case sne_amg: |
1283 | postpr = 1; off=scmp_amg; break; |
1284 | } |
1285 | if (off != -1) cv = cvp[off]; |
1286 | if (!cv) { |
1287 | goto not_found; |
1288 | } |
1289 | } else { |
a6006777 |
1290 | not_found: /* No method found, either report or croak */ |
a0d0e21e |
1291 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1292 | notfound = 1; lr = -1; |
1293 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1294 | notfound = 1; lr = 1; |
1295 | } else { |
46fc3d4c |
1296 | SV *msg; |
774d564b |
1297 | if (off==-1) off=method; |
46fc3d4c |
1298 | msg = sv_2mortal(newSVpvf( |
1299 | "Operation `%s': no method found,%sargument %s%s%s%s", |
a6006777 |
1300 | AMG_names[method + assignshift], |
e7ea3e70 |
1301 | (flags & AMGf_unary ? " " : "\n\tleft "), |
a0d0e21e |
1302 | SvAMAGIC(left)? |
1303 | "in overloaded package ": |
1304 | "has no overloaded magic", |
1305 | SvAMAGIC(left)? |
1306 | HvNAME(SvSTASH(SvRV(left))): |
1307 | "", |
1308 | SvAMAGIC(right)? |
e7ea3e70 |
1309 | ",\n\tright argument in overloaded package ": |
1310 | (flags & AMGf_unary |
1311 | ? "" |
1312 | : ",\n\tright argument has no overloaded magic"), |
a0d0e21e |
1313 | SvAMAGIC(right)? |
1314 | HvNAME(SvSTASH(SvRV(right))): |
46fc3d4c |
1315 | "")); |
a0d0e21e |
1316 | if (amtp && amtp->fallback >= AMGfallYES) { |
46fc3d4c |
1317 | DEBUG_o( deb("%s", SvPVX(msg)) ); |
a0d0e21e |
1318 | } else { |
fc36a67e |
1319 | croak("%_", msg); |
a0d0e21e |
1320 | } |
1321 | return NULL; |
1322 | } |
1323 | } |
1324 | } |
1325 | if (!notfound) { |
774d564b |
1326 | DEBUG_o( deb( |
46fc3d4c |
1327 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
a6006777 |
1328 | AMG_names[off], |
748a9306 |
1329 | method+assignshift==off? "" : |
1330 | " (initially `", |
1331 | method+assignshift==off? "" : |
a6006777 |
1332 | AMG_names[method+assignshift], |
748a9306 |
1333 | method+assignshift==off? "" : "')", |
1334 | flags & AMGf_unary? "" : |
1335 | lr==1 ? " for right argument": " for left argument", |
1336 | flags & AMGf_unary? " for argument" : "", |
a0d0e21e |
1337 | HvNAME(stash), |
1338 | fl? ",\n\tassignment variant used": "") ); |
748a9306 |
1339 | /* Since we use shallow copy during assignment, we need |
1340 | * to dublicate the contents, probably calling user-supplied |
1341 | * version of copy operator |
1342 | */ |
c07a80fd |
1343 | if ((method + assignshift==off |
748a9306 |
1344 | && (assign || method==inc_amg || method==dec_amg)) |
1345 | || inc_dec_ass) RvDEEPCP(left); |
a0d0e21e |
1346 | } |
1347 | { |
1348 | dSP; |
1349 | BINOP myop; |
1350 | SV* res; |
54310121 |
1351 | bool oldcatch = CATCH_GET; |
a0d0e21e |
1352 | |
54310121 |
1353 | CATCH_SET(TRUE); |
a0d0e21e |
1354 | Zero(&myop, 1, BINOP); |
1355 | myop.op_last = (OP *) &myop; |
1356 | myop.op_next = Nullop; |
54310121 |
1357 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1358 | |
e788e7d3 |
1359 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e |
1360 | ENTER; |
462e5cf6 |
1361 | SAVEOP(); |
a0d0e21e |
1362 | op = (OP *) &myop; |
84902520 |
1363 | if (PERLDB_SUB && curstash != debstash) |
dc437b57 |
1364 | op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1365 | PUTBACK; |
11343788 |
1366 | pp_pushmark(ARGS); |
a0d0e21e |
1367 | |
924508f0 |
1368 | EXTEND(SP, notfound + 5); |
a0d0e21e |
1369 | PUSHs(lr>0? right: left); |
1370 | PUSHs(lr>0? left: right); |
5167a5b1 |
1371 | PUSHs( lr > 0 ? &sv_yes : ( assign ? &sv_undef : &sv_no )); |
a0d0e21e |
1372 | if (notfound) { |
a6006777 |
1373 | PUSHs( sv_2mortal(newSVpv((char *)AMG_names[method + assignshift],0)) ); |
a0d0e21e |
1374 | } |
1375 | PUSHs((SV*)cv); |
1376 | PUTBACK; |
1377 | |
11343788 |
1378 | if (op = pp_entersub(ARGS)) |
76e3520e |
1379 | CALLRUNOPS(); |
a0d0e21e |
1380 | LEAVE; |
1381 | SPAGAIN; |
1382 | |
1383 | res=POPs; |
d3acc0f7 |
1384 | POPSTACK; |
54310121 |
1385 | CATCH_SET(oldcatch); |
a0d0e21e |
1386 | |
a0d0e21e |
1387 | if (postpr) { |
1388 | int ans; |
1389 | switch (method) { |
1390 | case le_amg: |
1391 | case sle_amg: |
1392 | ans=SvIV(res)<=0; break; |
1393 | case lt_amg: |
1394 | case slt_amg: |
1395 | ans=SvIV(res)<0; break; |
1396 | case ge_amg: |
1397 | case sge_amg: |
1398 | ans=SvIV(res)>=0; break; |
1399 | case gt_amg: |
1400 | case sgt_amg: |
1401 | ans=SvIV(res)>0; break; |
1402 | case eq_amg: |
1403 | case seq_amg: |
1404 | ans=SvIV(res)==0; break; |
1405 | case ne_amg: |
1406 | case sne_amg: |
1407 | ans=SvIV(res)!=0; break; |
1408 | case inc_amg: |
1409 | case dec_amg: |
bbce6d69 |
1410 | SvSetSV(left,res); return left; |
dc437b57 |
1411 | case not_amg: |
44a8e56a |
1412 | ans=!SvOK(res); break; |
a0d0e21e |
1413 | } |
54310121 |
1414 | return boolSV(ans); |
748a9306 |
1415 | } else if (method==copy_amg) { |
1416 | if (!SvROK(res)) { |
a6006777 |
1417 | croak("Copy method did not return a reference"); |
748a9306 |
1418 | } |
1419 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1420 | } else { |
1421 | return res; |
1422 | } |
1423 | } |
1424 | } |
1425 | #endif /* OVERLOAD */ |
4e35701f |
1426 | |