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 | |
22 | GV * |
8ac85365 |
23 | gv_AVadd(register GV *gv) |
79072805 |
24 | { |
a0d0e21e |
25 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
26 | croak("Bad symbol for array"); |
79072805 |
27 | if (!GvAV(gv)) |
28 | GvAV(gv) = newAV(); |
29 | return gv; |
30 | } |
31 | |
32 | GV * |
8ac85365 |
33 | gv_HVadd(register GV *gv) |
79072805 |
34 | { |
a0d0e21e |
35 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
36 | croak("Bad symbol for hash"); |
79072805 |
37 | if (!GvHV(gv)) |
463ee0b2 |
38 | GvHV(gv) = newHV(); |
79072805 |
39 | return gv; |
40 | } |
41 | |
42 | GV * |
8ac85365 |
43 | gv_IOadd(register GV *gv) |
a0d0e21e |
44 | { |
45 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
46 | croak("Bad symbol for filehandle"); |
47 | if (!GvIOp(gv)) |
48 | GvIOp(gv) = newIO(); |
49 | return gv; |
50 | } |
51 | |
52 | GV * |
8ac85365 |
53 | gv_fetchfile(char *name) |
79072805 |
54 | { |
e858de61 |
55 | dTHR; |
53d95988 |
56 | char smallbuf[256]; |
57 | char *tmpbuf; |
8ebc5c01 |
58 | STRLEN tmplen; |
79072805 |
59 | GV *gv; |
60 | |
53d95988 |
61 | tmplen = strlen(name) + 2; |
62 | if (tmplen < sizeof smallbuf) |
63 | tmpbuf = smallbuf; |
64 | else |
65 | New(603, tmpbuf, tmplen + 1, char); |
66 | tmpbuf[0] = '_'; |
67 | tmpbuf[1] = '<'; |
68 | strcpy(tmpbuf + 2, name); |
3280af22 |
69 | gv = *(GV**)hv_fetch(PL_defstash, tmpbuf, tmplen, TRUE); |
8ebc5c01 |
70 | if (!isGV(gv)) |
3280af22 |
71 | gv_init(gv, PL_defstash, tmpbuf, tmplen, FALSE); |
53d95988 |
72 | if (tmpbuf != smallbuf) |
73 | Safefree(tmpbuf); |
79072805 |
74 | sv_setpv(GvSV(gv), name); |
8ebc5c01 |
75 | if (*name == '/' && (instr(name, "/lib/") || instr(name, ".pm"))) |
a5f75d66 |
76 | GvMULTI_on(gv); |
84902520 |
77 | if (PERLDB_LINE) |
93a17b20 |
78 | hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L'); |
79072805 |
79 | return gv; |
80 | } |
81 | |
463ee0b2 |
82 | void |
8ac85365 |
83 | gv_init(GV *gv, HV *stash, char *name, STRLEN len, int multi) |
463ee0b2 |
84 | { |
0f15f207 |
85 | dTHR; |
463ee0b2 |
86 | register GP *gp; |
55d729e4 |
87 | bool doproto = SvTYPE(gv) > SVt_NULL; |
88 | char *proto = (doproto && SvPOK(gv)) ? SvPVX(gv) : NULL; |
463ee0b2 |
89 | |
dc437b57 |
90 | sv_upgrade((SV*)gv, SVt_PVGV); |
55d729e4 |
91 | if (SvLEN(gv)) { |
92 | if (proto) { |
93 | SvPVX(gv) = NULL; |
94 | SvLEN(gv) = 0; |
95 | SvPOK_off(gv); |
96 | } else |
97 | Safefree(SvPVX(gv)); |
98 | } |
44a8e56a |
99 | Newz(602, gp, 1, GP); |
8990e307 |
100 | GvGP(gv) = gp_ref(gp); |
463ee0b2 |
101 | GvSV(gv) = NEWSV(72,0); |
3280af22 |
102 | GvLINE(gv) = PL_curcop->cop_line; |
103 | GvFILEGV(gv) = PL_curcop->cop_filegv; |
005a453c |
104 | GvCVGEN(gv) = 0; |
463ee0b2 |
105 | GvEGV(gv) = gv; |
106 | sv_magic((SV*)gv, (SV*)gv, '*', name, len); |
85aff577 |
107 | GvSTASH(gv) = (HV*)SvREFCNT_inc(stash); |
a0d0e21e |
108 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 |
109 | GvNAMELEN(gv) = len; |
110 | if (multi) |
a5f75d66 |
111 | GvMULTI_on(gv); |
55d729e4 |
112 | if (doproto) { /* Replicate part of newSUB here. */ |
57ff9a15 |
113 | SvIOK_off(gv); |
55d729e4 |
114 | ENTER; |
115 | start_subparse(0,0); /* Create CV in compcv. */ |
3280af22 |
116 | GvCV(gv) = PL_compcv; |
55d729e4 |
117 | LEAVE; |
118 | |
3280af22 |
119 | PL_sub_generation++; |
55d729e4 |
120 | CvGV(GvCV(gv)) = (GV*)SvREFCNT_inc(gv); |
3280af22 |
121 | CvFILEGV(GvCV(gv)) = PL_curcop->cop_filegv; |
122 | CvSTASH(GvCV(gv)) = PL_curstash; |
55d729e4 |
123 | #ifdef USE_THREADS |
124 | CvOWNER(GvCV(gv)) = 0; |
b0a484d2 |
125 | if (!CvMUTEXP(GvCV(gv))) |
126 | New(666, CvMUTEXP(GvCV(gv)), 1, perl_mutex); |
55d729e4 |
127 | MUTEX_INIT(CvMUTEXP(GvCV(gv))); |
128 | #endif /* USE_THREADS */ |
129 | if (proto) { |
130 | sv_setpv((SV*)GvCV(gv), proto); |
131 | Safefree(proto); |
132 | } |
133 | } |
463ee0b2 |
134 | } |
135 | |
76e3520e |
136 | STATIC void |
8ac85365 |
137 | gv_init_sv(GV *gv, I32 sv_type) |
a0d0e21e |
138 | { |
139 | switch (sv_type) { |
140 | case SVt_PVIO: |
141 | (void)GvIOn(gv); |
142 | break; |
143 | case SVt_PVAV: |
144 | (void)GvAVn(gv); |
145 | break; |
146 | case SVt_PVHV: |
147 | (void)GvHVn(gv); |
148 | break; |
149 | } |
150 | } |
151 | |
79072805 |
152 | GV * |
8ac85365 |
153 | gv_fetchmeth(HV *stash, char *name, STRLEN len, I32 level) |
79072805 |
154 | { |
155 | AV* av; |
463ee0b2 |
156 | GV* topgv; |
79072805 |
157 | GV* gv; |
463ee0b2 |
158 | GV** gvp; |
748a9306 |
159 | CV* cv; |
a0d0e21e |
160 | |
161 | if (!stash) |
162 | return 0; |
44a8e56a |
163 | if ((level > 100) || (level < -100)) |
3e0ccd42 |
164 | croak("Recursive inheritance detected while looking for method '%s' in package '%s'", |
165 | name, HvNAME(stash)); |
463ee0b2 |
166 | |
463ee0b2 |
167 | DEBUG_o( deb("Looking for method %s in package %s\n",name,HvNAME(stash)) ); |
44a8e56a |
168 | |
169 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); |
170 | if (!gvp) |
171 | topgv = Nullgv; |
172 | else { |
173 | topgv = *gvp; |
174 | if (SvTYPE(topgv) != SVt_PVGV) |
175 | gv_init(topgv, stash, name, len, TRUE); |
176 | if (cv = GvCV(topgv)) { |
177 | /* If genuine method or valid cache entry, use it */ |
3280af22 |
178 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) == PL_sub_generation) |
7a4c00b4 |
179 | return topgv; |
44a8e56a |
180 | /* Stale cached entry: junk it */ |
181 | SvREFCNT_dec(cv); |
182 | GvCV(topgv) = cv = Nullcv; |
183 | GvCVGEN(topgv) = 0; |
748a9306 |
184 | } |
3280af22 |
185 | else if (GvCVGEN(topgv) == PL_sub_generation) |
005a453c |
186 | return 0; /* cache indicates sub doesn't exist */ |
463ee0b2 |
187 | } |
79072805 |
188 | |
9607fc9c |
189 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
3280af22 |
190 | av = (gvp && (gv = *gvp) && gv != (GV*)&PL_sv_undef) ? GvAV(gv) : Nullav; |
9607fc9c |
191 | |
fb73857a |
192 | /* create and re-create @.*::SUPER::ISA on demand */ |
193 | if (!av || !SvMAGIC(av)) { |
9607fc9c |
194 | char* packname = HvNAME(stash); |
195 | STRLEN packlen = strlen(packname); |
196 | |
197 | if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) { |
198 | HV* basestash; |
199 | |
200 | packlen -= 7; |
201 | basestash = gv_stashpvn(packname, packlen, TRUE); |
202 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); |
3280af22 |
203 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
e858de61 |
204 | dTHR; /* just for SvREFCNT_dec */ |
9607fc9c |
205 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
206 | if (!gvp || !(gv = *gvp)) |
207 | croak("Cannot create %s::ISA", HvNAME(stash)); |
208 | if (SvTYPE(gv) != SVt_PVGV) |
209 | gv_init(gv, stash, "ISA", 3, TRUE); |
210 | SvREFCNT_dec(GvAV(gv)); |
211 | GvAV(gv) = (AV*)SvREFCNT_inc(av); |
212 | } |
213 | } |
214 | } |
215 | |
216 | if (av) { |
79072805 |
217 | SV** svp = AvARRAY(av); |
93965878 |
218 | /* NOTE: No support for tied ISA */ |
219 | I32 items = AvFILLp(av) + 1; |
79072805 |
220 | while (items--) { |
79072805 |
221 | SV* sv = *svp++; |
a0d0e21e |
222 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 |
223 | if (!basestash) { |
d008e5eb |
224 | dTHR; /* just for ckWARN */ |
599cee73 |
225 | if (ckWARN(WARN_MISC)) |
226 | warner(WARN_MISC, "Can't locate package %s for @%s::ISA", |
463ee0b2 |
227 | SvPVX(sv), HvNAME(stash)); |
79072805 |
228 | continue; |
229 | } |
44a8e56a |
230 | gv = gv_fetchmeth(basestash, name, len, |
231 | (level >= 0) ? level + 1 : level - 1); |
232 | if (gv) |
233 | goto gotcha; |
79072805 |
234 | } |
235 | } |
a0d0e21e |
236 | |
9607fc9c |
237 | /* if at top level, try UNIVERSAL */ |
238 | |
44a8e56a |
239 | if (level == 0 || level == -1) { |
9607fc9c |
240 | HV* lastchance; |
241 | |
dc437b57 |
242 | if (lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE)) { |
44a8e56a |
243 | if (gv = gv_fetchmeth(lastchance, name, len, |
244 | (level >= 0) ? level + 1 : level - 1)) { |
245 | gotcha: |
dc848c6f |
246 | /* |
247 | * Cache method in topgv if: |
248 | * 1. topgv has no synonyms (else inheritance crosses wires) |
249 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) |
250 | */ |
251 | if (topgv && |
252 | GvREFCNT(topgv) == 1 && |
253 | (cv = GvCV(gv)) && |
254 | (CvROOT(cv) || CvXSUB(cv))) |
255 | { |
44a8e56a |
256 | if (cv = GvCV(topgv)) |
257 | SvREFCNT_dec(cv); |
258 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); |
3280af22 |
259 | GvCVGEN(topgv) = PL_sub_generation; |
44a8e56a |
260 | } |
a0d0e21e |
261 | return gv; |
262 | } |
005a453c |
263 | else if (topgv && GvREFCNT(topgv) == 1) { |
264 | /* cache the fact that the method is not defined */ |
3280af22 |
265 | GvCVGEN(topgv) = PL_sub_generation; |
005a453c |
266 | } |
a0d0e21e |
267 | } |
268 | } |
269 | |
79072805 |
270 | return 0; |
271 | } |
272 | |
273 | GV * |
8ac85365 |
274 | gv_fetchmethod(HV *stash, char *name) |
463ee0b2 |
275 | { |
dc848c6f |
276 | return gv_fetchmethod_autoload(stash, name, TRUE); |
277 | } |
278 | |
279 | GV * |
8ac85365 |
280 | gv_fetchmethod_autoload(HV *stash, char *name, I32 autoload) |
dc848c6f |
281 | { |
0f15f207 |
282 | dTHR; |
463ee0b2 |
283 | register char *nend; |
a0d0e21e |
284 | char *nsplit = 0; |
285 | GV* gv; |
463ee0b2 |
286 | |
287 | for (nend = name; *nend; nend++) { |
9607fc9c |
288 | if (*nend == '\'') |
a0d0e21e |
289 | nsplit = nend; |
9607fc9c |
290 | else if (*nend == ':' && *(nend + 1) == ':') |
291 | nsplit = ++nend; |
a0d0e21e |
292 | } |
293 | if (nsplit) { |
a0d0e21e |
294 | char *origname = name; |
295 | name = nsplit + 1; |
a0d0e21e |
296 | if (*nsplit == ':') |
297 | --nsplit; |
9607fc9c |
298 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
299 | /* ->SUPER::method should really be looked up in original stash */ |
fc36a67e |
300 | SV *tmpstr = sv_2mortal(newSVpvf("%s::SUPER", |
3280af22 |
301 | HvNAME(PL_curcop->cop_stash))); |
9607fc9c |
302 | stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); |
303 | DEBUG_o( deb("Treating %s as %s::%s\n", |
304 | origname, HvNAME(stash), name) ); |
4633a7c4 |
305 | } |
9607fc9c |
306 | else |
307 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); |
4633a7c4 |
308 | } |
309 | |
9607fc9c |
310 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e |
311 | if (!gv) { |
702887b4 |
312 | if (strEQ(name,"import")) |
3280af22 |
313 | gv = (GV*)&PL_sv_yes; |
dc848c6f |
314 | else if (autoload) |
54310121 |
315 | gv = gv_autoload4(stash, name, nend - name, TRUE); |
463ee0b2 |
316 | } |
dc848c6f |
317 | else if (autoload) { |
318 | CV* cv = GvCV(gv); |
09280a33 |
319 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
320 | GV* stubgv; |
321 | GV* autogv; |
322 | |
323 | if (CvANON(cv)) |
324 | stubgv = gv; |
325 | else { |
326 | stubgv = CvGV(cv); |
327 | if (GvCV(stubgv) != cv) /* orphaned import */ |
328 | stubgv = gv; |
329 | } |
330 | autogv = gv_autoload4(GvSTASH(stubgv), |
331 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); |
dc848c6f |
332 | if (autogv) |
333 | gv = autogv; |
334 | } |
335 | } |
44a8e56a |
336 | |
337 | return gv; |
338 | } |
339 | |
340 | GV* |
8ac85365 |
341 | gv_autoload4(HV *stash, char *name, STRLEN len, I32 method) |
44a8e56a |
342 | { |
d008e5eb |
343 | dTHR; |
44a8e56a |
344 | static char autoload[] = "AUTOLOAD"; |
345 | static STRLEN autolen = 8; |
346 | GV* gv; |
347 | CV* cv; |
348 | HV* varstash; |
349 | GV* vargv; |
350 | SV* varsv; |
351 | |
352 | if (len == autolen && strnEQ(name, autoload, autolen)) |
353 | return Nullgv; |
dc848c6f |
354 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
355 | return Nullgv; |
356 | cv = GvCV(gv); |
357 | |
358 | /* |
359 | * Inheriting AUTOLOAD for non-methods works ... for now. |
360 | */ |
599cee73 |
361 | if (ckWARN(WARN_DEPRECATED) && !method && |
362 | (GvCVGEN(gv) || GvSTASH(gv) != stash)) |
363 | warner(WARN_DEPRECATED, |
dc848c6f |
364 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", |
365 | HvNAME(stash), (int)len, name); |
44a8e56a |
366 | |
367 | /* |
368 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. |
369 | * The subroutine's original name may not be "AUTOLOAD", so we don't |
370 | * use that, but for lack of anything better we will use the sub's |
371 | * original package to look up $AUTOLOAD. |
372 | */ |
373 | varstash = GvSTASH(CvGV(cv)); |
374 | vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); |
375 | if (!isGV(vargv)) |
376 | gv_init(vargv, varstash, autoload, autolen, FALSE); |
377 | varsv = GvSV(vargv); |
378 | sv_setpv(varsv, HvNAME(stash)); |
379 | sv_catpvn(varsv, "::", 2); |
380 | sv_catpvn(varsv, name, len); |
381 | SvTAINTED_off(varsv); |
a0d0e21e |
382 | return gv; |
383 | } |
384 | |
385 | HV* |
8ac85365 |
386 | gv_stashpv(char *name, I32 create) |
a0d0e21e |
387 | { |
dc437b57 |
388 | return gv_stashpvn(name, strlen(name), create); |
389 | } |
390 | |
391 | HV* |
8ac85365 |
392 | gv_stashpvn(char *name, U32 namelen, I32 create) |
dc437b57 |
393 | { |
46fc3d4c |
394 | char smallbuf[256]; |
395 | char *tmpbuf; |
a0d0e21e |
396 | HV *stash; |
397 | GV *tmpgv; |
dc437b57 |
398 | |
46fc3d4c |
399 | if (namelen + 3 < sizeof smallbuf) |
400 | tmpbuf = smallbuf; |
401 | else |
402 | New(606, tmpbuf, namelen + 3, char); |
dc437b57 |
403 | Copy(name,tmpbuf,namelen,char); |
404 | tmpbuf[namelen++] = ':'; |
405 | tmpbuf[namelen++] = ':'; |
406 | tmpbuf[namelen] = '\0'; |
46fc3d4c |
407 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
408 | if (tmpbuf != smallbuf) |
409 | Safefree(tmpbuf); |
a0d0e21e |
410 | if (!tmpgv) |
411 | return 0; |
412 | if (!GvHV(tmpgv)) |
413 | GvHV(tmpgv) = newHV(); |
414 | stash = GvHV(tmpgv); |
415 | if (!HvNAME(stash)) |
416 | HvNAME(stash) = savepv(name); |
417 | return stash; |
463ee0b2 |
418 | } |
419 | |
a0d0e21e |
420 | HV* |
8ac85365 |
421 | gv_stashsv(SV *sv, I32 create) |
a0d0e21e |
422 | { |
dc437b57 |
423 | register char *ptr; |
424 | STRLEN len; |
425 | ptr = SvPV(sv,len); |
426 | return gv_stashpvn(ptr, len, create); |
a0d0e21e |
427 | } |
428 | |
429 | |
463ee0b2 |
430 | GV * |
8ac85365 |
431 | gv_fetchpv(char *nambeg, I32 add, I32 sv_type) |
79072805 |
432 | { |
11343788 |
433 | dTHR; |
463ee0b2 |
434 | register char *name = nambeg; |
435 | register GV *gv = 0; |
79072805 |
436 | GV**gvp; |
79072805 |
437 | I32 len; |
438 | register char *namend; |
463ee0b2 |
439 | HV *stash = 0; |
9607fc9c |
440 | U32 add_gvflags = 0; |
79072805 |
441 | |
c07a80fd |
442 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
443 | name++; |
444 | |
79072805 |
445 | for (namend = name; *namend; namend++) { |
463ee0b2 |
446 | if ((*namend == '\'' && namend[1]) || |
447 | (*namend == ':' && namend[1] == ':')) |
448 | { |
463ee0b2 |
449 | if (!stash) |
3280af22 |
450 | stash = PL_defstash; |
dc437b57 |
451 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e |
452 | return Nullgv; |
463ee0b2 |
453 | |
85e6fe83 |
454 | len = namend - name; |
455 | if (len > 0) { |
3c78fafa |
456 | char smallbuf[256]; |
62b57502 |
457 | char *tmpbuf; |
62b57502 |
458 | |
3c78fafa |
459 | if (len + 3 < sizeof smallbuf) |
460 | tmpbuf = smallbuf; |
62b57502 |
461 | else |
462 | New(601, tmpbuf, len+3, char); |
a0d0e21e |
463 | Copy(name, tmpbuf, len, char); |
464 | tmpbuf[len++] = ':'; |
465 | tmpbuf[len++] = ':'; |
466 | tmpbuf[len] = '\0'; |
463ee0b2 |
467 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
6fa846a0 |
468 | gv = gvp ? *gvp : Nullgv; |
3280af22 |
469 | if (gv && gv != (GV*)&PL_sv_undef) { |
6fa846a0 |
470 | if (SvTYPE(gv) != SVt_PVGV) |
0f303493 |
471 | gv_init(gv, stash, tmpbuf, len, (add & GV_ADDMULTI)); |
6fa846a0 |
472 | else |
473 | GvMULTI_on(gv); |
474 | } |
3c78fafa |
475 | if (tmpbuf != smallbuf) |
62b57502 |
476 | Safefree(tmpbuf); |
3280af22 |
477 | if (!gv || gv == (GV*)&PL_sv_undef) |
a0d0e21e |
478 | return Nullgv; |
85e6fe83 |
479 | |
463ee0b2 |
480 | if (!(stash = GvHV(gv))) |
481 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
482 | |
463ee0b2 |
483 | if (!HvNAME(stash)) |
a0d0e21e |
484 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 |
485 | } |
486 | |
487 | if (*namend == ':') |
488 | namend++; |
489 | namend++; |
490 | name = namend; |
491 | if (!*name) |
3280af22 |
492 | return gv ? gv : (GV*)*hv_fetch(PL_defstash, "main::", 6, TRUE); |
79072805 |
493 | } |
79072805 |
494 | } |
a0d0e21e |
495 | len = namend - name; |
496 | if (!len) |
497 | len = 1; |
463ee0b2 |
498 | |
499 | /* No stash in name, so see how we can default */ |
500 | |
501 | if (!stash) { |
502 | if (isIDFIRST(*name)) { |
9607fc9c |
503 | bool global = FALSE; |
504 | |
463ee0b2 |
505 | if (isUPPER(*name)) { |
9d116dd7 |
506 | if (*name == 'S' && ( |
507 | strEQ(name, "SIG") || |
508 | strEQ(name, "STDIN") || |
509 | strEQ(name, "STDOUT") || |
510 | strEQ(name, "STDERR"))) |
511 | global = TRUE; |
512 | else if (*name == 'I' && strEQ(name, "INC")) |
513 | global = TRUE; |
514 | else if (*name == 'E' && strEQ(name, "ENV")) |
515 | global = TRUE; |
463ee0b2 |
516 | else if (*name == 'A' && ( |
517 | strEQ(name, "ARGV") || |
9d116dd7 |
518 | strEQ(name, "ARGVOUT"))) |
463ee0b2 |
519 | global = TRUE; |
520 | } |
521 | else if (*name == '_' && !name[1]) |
522 | global = TRUE; |
9607fc9c |
523 | |
463ee0b2 |
524 | if (global) |
3280af22 |
525 | stash = PL_defstash; |
526 | else if ((COP*)PL_curcop == &PL_compiling) { |
527 | stash = PL_curstash; |
528 | if (add && (PL_hints & HINT_STRICT_VARS) && |
748a9306 |
529 | sv_type != SVt_PVCV && |
530 | sv_type != SVt_PVGV && |
4633a7c4 |
531 | sv_type != SVt_PVFM && |
c07a80fd |
532 | sv_type != SVt_PVIO && |
377b8fbc |
533 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
748a9306 |
534 | { |
4633a7c4 |
535 | gvp = (GV**)hv_fetch(stash,name,len,0); |
536 | if (!gvp || |
3280af22 |
537 | *gvp == (GV*)&PL_sv_undef || |
a5f75d66 |
538 | SvTYPE(*gvp) != SVt_PVGV) |
539 | { |
4633a7c4 |
540 | stash = 0; |
a5f75d66 |
541 | } |
542 | else if (sv_type == SVt_PV && !GvIMPORTED_SV(*gvp) || |
543 | sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp) || |
544 | sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp) ) |
4633a7c4 |
545 | { |
a5f75d66 |
546 | warn("Variable \"%c%s\" is not imported", |
4633a7c4 |
547 | sv_type == SVt_PVAV ? '@' : |
548 | sv_type == SVt_PVHV ? '%' : '$', |
549 | name); |
8ebc5c01 |
550 | if (GvCVu(*gvp)) |
4633a7c4 |
551 | warn("(Did you mean &%s instead?)\n", name); |
a0d0e21e |
552 | stash = 0; |
4633a7c4 |
553 | } |
a0d0e21e |
554 | } |
85e6fe83 |
555 | } |
463ee0b2 |
556 | else |
3280af22 |
557 | stash = PL_curcop->cop_stash; |
463ee0b2 |
558 | } |
559 | else |
3280af22 |
560 | stash = PL_defstash; |
463ee0b2 |
561 | } |
562 | |
563 | /* By this point we should have a stash and a name */ |
564 | |
a0d0e21e |
565 | if (!stash) { |
93233ece |
566 | if (!add) |
a0d0e21e |
567 | return Nullgv; |
0f303493 |
568 | if (add & ~GV_ADDMULTI) { |
2c4aebbd |
569 | char sv_type_char = ((sv_type == SVt_PV) ? '$' |
570 | : (sv_type == SVt_PVAV) ? '@' |
571 | : (sv_type == SVt_PVHV) ? '%' |
572 | : 0); |
573 | if (sv_type_char) |
574 | warn("Global symbol \"%c%s\" requires explicit package name", |
575 | sv_type_char, name); |
576 | else |
93233ece |
577 | warn("Global symbol \"%s\" requires explicit package name", |
578 | name); |
a0d0e21e |
579 | } |
3280af22 |
580 | ++PL_error_count; |
581 | stash = PL_curstash ? PL_curstash : PL_defstash; /* avoid core dumps */ |
93233ece |
582 | add_gvflags = ((sv_type == SVt_PV) ? GVf_IMPORTED_SV |
583 | : (sv_type == SVt_PVAV) ? GVf_IMPORTED_AV |
584 | : (sv_type == SVt_PVHV) ? GVf_IMPORTED_HV |
585 | : 0); |
a0d0e21e |
586 | } |
587 | |
588 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
589 | return Nullgv; |
590 | |
79072805 |
591 | gvp = (GV**)hv_fetch(stash,name,len,add); |
3280af22 |
592 | if (!gvp || *gvp == (GV*)&PL_sv_undef) |
79072805 |
593 | return Nullgv; |
594 | gv = *gvp; |
595 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
596 | if (add) { |
a5f75d66 |
597 | GvMULTI_on(gv); |
a0d0e21e |
598 | gv_init_sv(gv, sv_type); |
599 | } |
79072805 |
600 | return gv; |
55d729e4 |
601 | } else if (add & GV_NOINIT) { |
602 | return gv; |
79072805 |
603 | } |
93a17b20 |
604 | |
605 | /* Adding a new symbol */ |
606 | |
55d729e4 |
607 | if (add & GV_ADDWARN) |
a0d0e21e |
608 | warn("Had to create %s unexpectedly", nambeg); |
55d729e4 |
609 | gv_init(gv, stash, name, len, add & GV_ADDMULTI); |
a0d0e21e |
610 | gv_init_sv(gv, sv_type); |
9607fc9c |
611 | GvFLAGS(gv) |= add_gvflags; |
93a17b20 |
612 | |
613 | /* set up magic where warranted */ |
614 | switch (*name) { |
a0d0e21e |
615 | case 'A': |
616 | if (strEQ(name, "ARGV")) { |
617 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
618 | } |
619 | break; |
620 | |
ed6116ce |
621 | case 'a': |
622 | case 'b': |
623 | if (len == 1) |
a5f75d66 |
624 | GvMULTI_on(gv); |
ed6116ce |
625 | break; |
a0d0e21e |
626 | case 'E': |
627 | if (strnEQ(name, "EXPORT", 6)) |
a5f75d66 |
628 | GvMULTI_on(gv); |
a0d0e21e |
629 | break; |
463ee0b2 |
630 | case 'I': |
631 | if (strEQ(name, "ISA")) { |
632 | AV* av = GvAVn(gv); |
a5f75d66 |
633 | GvMULTI_on(gv); |
a0d0e21e |
634 | sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0); |
93965878 |
635 | /* NOTE: No support for tied ISA */ |
55d729e4 |
636 | if ((add & GV_ADDMULTI) && strEQ(nambeg,"AnyDBM_File::ISA") |
637 | && AvFILLp(av) == -1) |
85e6fe83 |
638 | { |
a0d0e21e |
639 | char *pname; |
640 | av_push(av, newSVpv(pname = "NDBM_File",0)); |
dc437b57 |
641 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e |
642 | av_push(av, newSVpv(pname = "DB_File",0)); |
dc437b57 |
643 | gv_stashpvn(pname, 7, TRUE); |
a0d0e21e |
644 | av_push(av, newSVpv(pname = "GDBM_File",0)); |
dc437b57 |
645 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e |
646 | av_push(av, newSVpv(pname = "SDBM_File",0)); |
dc437b57 |
647 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e |
648 | av_push(av, newSVpv(pname = "ODBM_File",0)); |
dc437b57 |
649 | gv_stashpvn(pname, 9, TRUE); |
85e6fe83 |
650 | } |
463ee0b2 |
651 | } |
652 | break; |
a0d0e21e |
653 | #ifdef OVERLOAD |
654 | case 'O': |
655 | if (strEQ(name, "OVERLOAD")) { |
656 | HV* hv = GvHVn(gv); |
a5f75d66 |
657 | GvMULTI_on(gv); |
ea0efc06 |
658 | hv_magic(hv, gv, 'A'); |
a0d0e21e |
659 | } |
660 | break; |
661 | #endif /* OVERLOAD */ |
93a17b20 |
662 | case 'S': |
663 | if (strEQ(name, "SIG")) { |
664 | HV *hv; |
dc437b57 |
665 | I32 i; |
3280af22 |
666 | PL_siggv = gv; |
667 | GvMULTI_on(PL_siggv); |
668 | hv = GvHVn(PL_siggv); |
669 | hv_magic(hv, PL_siggv, 'S'); |
dc437b57 |
670 | for(i=1;sig_name[i];i++) { |
671 | SV ** init; |
672 | init=hv_fetch(hv,sig_name[i],strlen(sig_name[i]),1); |
673 | if(init) |
3280af22 |
674 | sv_setsv(*init,&PL_sv_undef); |
dc437b57 |
675 | psig_ptr[i] = 0; |
676 | psig_name[i] = 0; |
677 | } |
93a17b20 |
678 | } |
679 | break; |
680 | |
681 | case '&': |
463ee0b2 |
682 | if (len > 1) |
683 | break; |
3280af22 |
684 | PL_ampergv = gv; |
685 | PL_sawampersand = TRUE; |
a0d0e21e |
686 | goto ro_magicalize; |
93a17b20 |
687 | |
688 | case '`': |
463ee0b2 |
689 | if (len > 1) |
690 | break; |
3280af22 |
691 | PL_leftgv = gv; |
692 | PL_sawampersand = TRUE; |
a0d0e21e |
693 | goto ro_magicalize; |
93a17b20 |
694 | |
695 | case '\'': |
463ee0b2 |
696 | if (len > 1) |
697 | break; |
3280af22 |
698 | PL_rightgv = gv; |
699 | PL_sawampersand = TRUE; |
a0d0e21e |
700 | goto ro_magicalize; |
93a17b20 |
701 | |
702 | case ':': |
463ee0b2 |
703 | if (len > 1) |
704 | break; |
3280af22 |
705 | sv_setpv(GvSV(gv),PL_chopset); |
93a17b20 |
706 | goto magicalize; |
707 | |
ff0cee69 |
708 | case '?': |
709 | if (len > 1) |
710 | break; |
711 | #ifdef COMPLEX_STATUS |
712 | sv_upgrade(GvSV(gv), SVt_PVLV); |
713 | #endif |
714 | goto magicalize; |
715 | |
067391ea |
716 | case '!': |
4318d5a0 |
717 | if (len > 1) |
067391ea |
718 | break; |
3280af22 |
719 | if (sv_type > SVt_PV && PL_curcop != &PL_compiling) { |
067391ea |
720 | HV* stash = gv_stashpvn("Errno",5,FALSE); |
721 | if(!stash || !(gv_fetchmethod(stash, "TIEHASH"))) { |
722 | dSP; |
723 | PUTBACK; |
724 | perl_require_pv("Errno.pm"); |
725 | SPAGAIN; |
726 | stash = gv_stashpvn("Errno",5,FALSE); |
727 | if (!stash || !(gv_fetchmethod(stash, "TIEHASH"))) |
1d2dff63 |
728 | croak("Can't use %%! because Errno.pm is not available"); |
067391ea |
729 | } |
730 | } |
731 | goto magicalize; |
6cef1e77 |
732 | case '-': |
733 | if (len > 1) |
734 | break; |
735 | else { |
736 | AV* av = GvAVn(gv); |
737 | sv_magic((SV*)av, Nullsv, 'D', Nullch, 0); |
738 | } |
739 | goto magicalize; |
93a17b20 |
740 | case '#': |
a0d0e21e |
741 | case '*': |
599cee73 |
742 | if (ckWARN(WARN_DEPRECATED) && len == 1 && sv_type == SVt_PV) |
743 | warner(WARN_DEPRECATED, "Use of $%s is deprecated", name); |
a0d0e21e |
744 | /* FALL THROUGH */ |
745 | case '[': |
93a17b20 |
746 | case '^': |
747 | case '~': |
748 | case '=': |
93a17b20 |
749 | case '%': |
750 | case '.': |
93a17b20 |
751 | case '(': |
752 | case ')': |
753 | case '<': |
754 | case '>': |
755 | case ',': |
756 | case '\\': |
757 | case '/': |
93a17b20 |
758 | case '|': |
748a9306 |
759 | case '\001': |
599cee73 |
760 | case '\002': |
93a17b20 |
761 | case '\004': |
ad8898e0 |
762 | case '\005': |
748a9306 |
763 | case '\006': |
a0d0e21e |
764 | case '\010': |
9d116dd7 |
765 | case '\011': /* NOT \t in EBCDIC */ |
ad8898e0 |
766 | case '\017': |
93a17b20 |
767 | case '\020': |
768 | case '\024': |
769 | case '\027': |
463ee0b2 |
770 | if (len > 1) |
771 | break; |
772 | goto magicalize; |
6cef1e77 |
773 | case '\023': |
774 | if (len > 1) |
775 | break; |
776 | goto ro_magicalize; |
463ee0b2 |
777 | |
a0d0e21e |
778 | case '+': |
6cef1e77 |
779 | if (len > 1) |
780 | break; |
781 | else { |
782 | AV* av = GvAVn(gv); |
783 | sv_magic((SV*)av, (SV*)av, 'D', Nullch, 0); |
784 | } |
785 | /* FALL THROUGH */ |
463ee0b2 |
786 | case '1': |
787 | case '2': |
788 | case '3': |
789 | case '4': |
790 | case '5': |
791 | case '6': |
792 | case '7': |
793 | case '8': |
794 | case '9': |
a0d0e21e |
795 | ro_magicalize: |
796 | SvREADONLY_on(GvSV(gv)); |
93a17b20 |
797 | magicalize: |
463ee0b2 |
798 | sv_magic(GvSV(gv), (SV*)gv, 0, name, len); |
93a17b20 |
799 | break; |
800 | |
801 | case '\014': |
463ee0b2 |
802 | if (len > 1) |
803 | break; |
93a17b20 |
804 | sv_setpv(GvSV(gv),"\f"); |
3280af22 |
805 | PL_formfeed = GvSV(gv); |
93a17b20 |
806 | break; |
807 | case ';': |
463ee0b2 |
808 | if (len > 1) |
809 | break; |
93a17b20 |
810 | sv_setpv(GvSV(gv),"\034"); |
811 | break; |
463ee0b2 |
812 | case ']': |
813 | if (len == 1) { |
f86702cc |
814 | SV *sv = GvSV(gv); |
93a17b20 |
815 | sv_upgrade(sv, SVt_PVNV); |
3280af22 |
816 | sv_setpv(sv, PL_patchlevel); |
f86702cc |
817 | (void)sv_2nv(sv); |
818 | SvREADONLY_on(sv); |
93a17b20 |
819 | } |
820 | break; |
79072805 |
821 | } |
93a17b20 |
822 | return gv; |
79072805 |
823 | } |
824 | |
825 | void |
8ac85365 |
826 | gv_fullname3(SV *sv, GV *gv, char *prefix) |
79072805 |
827 | { |
828 | HV *hv = GvSTASH(gv); |
f967eb5f |
829 | if (!hv) { |
830 | SvOK_off(sv); |
79072805 |
831 | return; |
f967eb5f |
832 | } |
833 | sv_setpv(sv, prefix ? prefix : ""); |
79072805 |
834 | sv_catpv(sv,HvNAME(hv)); |
463ee0b2 |
835 | sv_catpvn(sv,"::", 2); |
79072805 |
836 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
837 | } |
838 | |
839 | void |
8ac85365 |
840 | gv_efullname3(SV *sv, GV *gv, char *prefix) |
79072805 |
841 | { |
f967eb5f |
842 | GV *egv = GvEGV(gv); |
748a9306 |
843 | if (!egv) |
844 | egv = gv; |
f6aff53a |
845 | gv_fullname3(sv, egv, prefix); |
846 | } |
847 | |
848 | /* XXX compatibility with versions <= 5.003. */ |
849 | void |
8ac85365 |
850 | gv_fullname(SV *sv, GV *gv) |
f6aff53a |
851 | { |
852 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
853 | } |
854 | |
855 | /* XXX compatibility with versions <= 5.003. */ |
856 | void |
8ac85365 |
857 | gv_efullname(SV *sv, GV *gv) |
f6aff53a |
858 | { |
859 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); |
79072805 |
860 | } |
861 | |
862 | IO * |
8ac85365 |
863 | newIO(void) |
79072805 |
864 | { |
11343788 |
865 | dTHR; |
79072805 |
866 | IO *io; |
8990e307 |
867 | GV *iogv; |
868 | |
869 | io = (IO*)NEWSV(0,0); |
a0d0e21e |
870 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 |
871 | SvREFCNT(io) = 1; |
872 | SvOBJECT_on(io); |
c9de509e |
873 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
874 | if (!iogv) |
875 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
8990e307 |
876 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 |
877 | return io; |
878 | } |
879 | |
880 | void |
8ac85365 |
881 | gv_check(HV *stash) |
79072805 |
882 | { |
11343788 |
883 | dTHR; |
79072805 |
884 | register HE *entry; |
885 | register I32 i; |
886 | register GV *gv; |
463ee0b2 |
887 | HV *hv; |
a0d0e21e |
888 | GV *filegv; |
463ee0b2 |
889 | |
8990e307 |
890 | if (!HvARRAY(stash)) |
891 | return; |
a0d0e21e |
892 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
dc437b57 |
893 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
894 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && |
895 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv)) |
a0d0e21e |
896 | { |
3280af22 |
897 | if (hv != PL_defstash) |
a0d0e21e |
898 | gv_check(hv); /* nested package */ |
899 | } |
dc437b57 |
900 | else if (isALPHA(*HeKEY(entry))) { |
901 | gv = (GV*)HeVAL(entry); |
55d729e4 |
902 | if (SvTYPE(gv) != SVt_PVGV || GvMULTI(gv)) |
463ee0b2 |
903 | continue; |
3280af22 |
904 | PL_curcop->cop_line = GvLINE(gv); |
a0d0e21e |
905 | filegv = GvFILEGV(gv); |
3280af22 |
906 | PL_curcop->cop_filegv = filegv; |
a5f75d66 |
907 | if (filegv && GvMULTI(filegv)) /* Filename began with slash */ |
8990e307 |
908 | continue; |
599cee73 |
909 | warner(WARN_ONCE, |
910 | "Name \"%s::%s\" used only once: possible typo", |
a0d0e21e |
911 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 |
912 | } |
79072805 |
913 | } |
914 | } |
915 | } |
916 | |
917 | GV * |
8ac85365 |
918 | newGVgen(char *pack) |
79072805 |
919 | { |
3280af22 |
920 | return gv_fetchpv(form("%s::_GEN_%ld", pack, (long)PL_gensym++), |
46fc3d4c |
921 | TRUE, SVt_PVGV); |
79072805 |
922 | } |
923 | |
924 | /* hopefully this is only called on local symbol table entries */ |
925 | |
926 | GP* |
8ac85365 |
927 | gp_ref(GP *gp) |
79072805 |
928 | { |
929 | gp->gp_refcnt++; |
44a8e56a |
930 | if (gp->gp_cv) { |
931 | if (gp->gp_cvgen) { |
932 | /* multi-named GPs cannot be used for method cache */ |
933 | SvREFCNT_dec(gp->gp_cv); |
934 | gp->gp_cv = Nullcv; |
935 | gp->gp_cvgen = 0; |
936 | } |
937 | else { |
938 | /* Adding a new name to a subroutine invalidates method cache */ |
3280af22 |
939 | PL_sub_generation++; |
44a8e56a |
940 | } |
941 | } |
79072805 |
942 | return gp; |
79072805 |
943 | } |
944 | |
945 | void |
8ac85365 |
946 | gp_free(GV *gv) |
79072805 |
947 | { |
79072805 |
948 | GP* gp; |
377b8fbc |
949 | CV* cv; |
79072805 |
950 | |
951 | if (!gv || !(gp = GvGP(gv))) |
952 | return; |
953 | if (gp->gp_refcnt == 0) { |
954 | warn("Attempt to free unreferenced glob pointers"); |
955 | return; |
956 | } |
44a8e56a |
957 | if (gp->gp_cv) { |
958 | /* Deleting the name of a subroutine invalidates method cache */ |
3280af22 |
959 | PL_sub_generation++; |
44a8e56a |
960 | } |
748a9306 |
961 | if (--gp->gp_refcnt > 0) { |
962 | if (gp->gp_egv == gv) |
963 | gp->gp_egv = 0; |
79072805 |
964 | return; |
748a9306 |
965 | } |
79072805 |
966 | |
8990e307 |
967 | SvREFCNT_dec(gp->gp_sv); |
968 | SvREFCNT_dec(gp->gp_av); |
969 | SvREFCNT_dec(gp->gp_hv); |
377b8fbc |
970 | SvREFCNT_dec(gp->gp_io); |
a6006777 |
971 | SvREFCNT_dec(gp->gp_cv); |
748a9306 |
972 | SvREFCNT_dec(gp->gp_form); |
973 | |
79072805 |
974 | Safefree(gp); |
975 | GvGP(gv) = 0; |
976 | } |
977 | |
978 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) |
979 | #define MICROPORT |
980 | #endif |
981 | |
982 | #ifdef MICROPORT /* Microport 2.4 hack */ |
983 | AV *GvAVn(gv) |
984 | register GV *gv; |
985 | { |
986 | if (GvGP(gv)->gp_av) |
987 | return GvGP(gv)->gp_av; |
988 | else |
989 | return GvGP(gv_AVadd(gv))->gp_av; |
990 | } |
991 | |
992 | HV *GvHVn(gv) |
993 | register GV *gv; |
994 | { |
995 | if (GvGP(gv)->gp_hv) |
996 | return GvGP(gv)->gp_hv; |
997 | else |
998 | return GvGP(gv_HVadd(gv))->gp_hv; |
999 | } |
1000 | #endif /* Microport 2.4 hack */ |
a0d0e21e |
1001 | |
1002 | #ifdef OVERLOAD |
1003 | /* Updates and caches the CV's */ |
1004 | |
1005 | bool |
8ac85365 |
1006 | Gv_AMupdate(HV *stash) |
a0d0e21e |
1007 | { |
11343788 |
1008 | dTHR; |
a0d0e21e |
1009 | GV** gvp; |
1010 | HV* hv; |
1011 | GV* gv; |
1012 | CV* cv; |
1013 | MAGIC* mg=mg_find((SV*)stash,'c'); |
8ac85365 |
1014 | AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
a6006777 |
1015 | AMT amt; |
a0d0e21e |
1016 | |
3280af22 |
1017 | if (mg && amtp->was_ok_am == PL_amagic_generation |
1018 | && amtp->was_ok_sub == PL_sub_generation) |
a6006777 |
1019 | return AMT_AMAGIC(amtp); |
1020 | if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */ |
748a9306 |
1021 | int i; |
a6006777 |
1022 | for (i=1; i<NofAMmeth; i++) { |
748a9306 |
1023 | if (amtp->table[i]) { |
1024 | SvREFCNT_dec(amtp->table[i]); |
1025 | } |
1026 | } |
1027 | } |
a0d0e21e |
1028 | sv_unmagic((SV*)stash, 'c'); |
1029 | |
1030 | DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) ); |
1031 | |
3280af22 |
1032 | amt.was_ok_am = PL_amagic_generation; |
1033 | amt.was_ok_sub = PL_sub_generation; |
a6006777 |
1034 | amt.fallback = AMGfallNO; |
1035 | amt.flags = 0; |
1036 | |
1037 | #ifdef OVERLOAD_VIA_HASH |
1038 | gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */ |
3280af22 |
1039 | if (gvp && ((gv = *gvp) != (GV*)&PL_sv_undef && (hv = GvHV(gv)))) { |
a0d0e21e |
1040 | int filled=0; |
1041 | int i; |
1042 | char *cp; |
a0d0e21e |
1043 | SV* sv; |
1044 | SV** svp; |
a0d0e21e |
1045 | |
1046 | /* Work with "fallback" key, which we assume to be first in AMG_names */ |
1047 | |
a6006777 |
1048 | if (( cp = (char *)AMG_names[0] ) && |
1049 | (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) { |
a0d0e21e |
1050 | if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1051 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
1052 | } |
a6006777 |
1053 | for (i = 1; i < NofAMmeth; i++) { |
1054 | cv = 0; |
1055 | cp = (char *)AMG_names[i]; |
1056 | |
1057 | svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE); |
3280af22 |
1058 | if (svp && ((sv = *svp) != &PL_sv_undef)) { |
a0d0e21e |
1059 | switch (SvTYPE(sv)) { |
1060 | default: |
1061 | if (!SvROK(sv)) { |
1062 | if (!SvOK(sv)) break; |
6b88bc9c |
1063 | gv = gv_fetchmethod(stash, SvPV(sv, PL_na)); |
a0d0e21e |
1064 | if (gv) cv = GvCV(gv); |
1065 | break; |
1066 | } |
1067 | cv = (CV*)SvRV(sv); |
1068 | if (SvTYPE(cv) == SVt_PVCV) |
1069 | break; |
1070 | /* FALL THROUGH */ |
1071 | case SVt_PVHV: |
1072 | case SVt_PVAV: |
a6006777 |
1073 | croak("Not a subroutine reference in overload table"); |
a0d0e21e |
1074 | return FALSE; |
1075 | case SVt_PVCV: |
8ebc5c01 |
1076 | cv = (CV*)sv; |
1077 | break; |
a0d0e21e |
1078 | case SVt_PVGV: |
8ebc5c01 |
1079 | if (!(cv = GvCVu((GV*)sv))) |
1080 | cv = sv_2cv(sv, &stash, &gv, TRUE); |
1081 | break; |
a0d0e21e |
1082 | } |
1083 | if (cv) filled=1; |
1084 | else { |
a6006777 |
1085 | croak("Method for operation %s not found in package %.256s during blessing\n", |
a0d0e21e |
1086 | cp,HvNAME(stash)); |
1087 | return FALSE; |
1088 | } |
1089 | } |
a6006777 |
1090 | #else |
1091 | { |
1092 | int filled = 0; |
1093 | int i; |
9607fc9c |
1094 | const char *cp; |
a6006777 |
1095 | SV* sv = NULL; |
1096 | SV** svp; |
1097 | |
1098 | /* Work with "fallback" key, which we assume to be first in AMG_names */ |
1099 | |
9607fc9c |
1100 | if ( cp = AMG_names[0] ) { |
a6006777 |
1101 | /* Try to find via inheritance. */ |
774d564b |
1102 | gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */ |
a6006777 |
1103 | if (gv) sv = GvSV(gv); |
1104 | |
774d564b |
1105 | if (!gv) goto no_table; |
a6006777 |
1106 | else if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1107 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
1108 | } |
1109 | |
1110 | for (i = 1; i < NofAMmeth; i++) { |
46fc3d4c |
1111 | SV *cookie = sv_2mortal(newSVpvf("(%s", cp = AMG_names[i])); |
44a8e56a |
1112 | DEBUG_o( deb("Checking overloading of `%s' in package `%.256s'\n", |
1113 | cp, HvNAME(stash)) ); |
46fc3d4c |
1114 | /* don't fill the cache while looking up! */ |
1115 | gv = gv_fetchmeth(stash, SvPVX(cookie), SvCUR(cookie), -1); |
1116 | cv = 0; |
44a8e56a |
1117 | if(gv && (cv = GvCV(gv))) { |
44a8e56a |
1118 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
1119 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { |
1120 | /* GvSV contains the name of the method. */ |
1121 | GV *ngv; |
1122 | |
1123 | DEBUG_o( deb("Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", |
3280af22 |
1124 | SvPV(GvSV(gv), PL_na), cp, HvNAME(stash)) ); |
dc848c6f |
1125 | if (!SvPOK(GvSV(gv)) |
1126 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), |
1127 | FALSE))) |
1128 | { |
44a8e56a |
1129 | /* Can be an import stub (created by `can'). */ |
1130 | if (GvCVGEN(gv)) { |
1131 | croak("Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", |
1132 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1133 | cp, HvNAME(stash)); |
1134 | } else |
1135 | croak("Cannot resolve method `%.256s' overloading `%s' in package `%.256s'", |
1136 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), |
1137 | cp, HvNAME(stash)); |
1138 | } |
dc848c6f |
1139 | cv = GvCV(gv = ngv); |
44a8e56a |
1140 | } |
1141 | DEBUG_o( deb("Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", |
1142 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), |
1143 | GvNAME(CvGV(cv))) ); |
1144 | filled = 1; |
1145 | } |
a6006777 |
1146 | #endif |
1147 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e |
1148 | } |
a0d0e21e |
1149 | if (filled) { |
a6006777 |
1150 | AMT_AMAGIC_on(&amt); |
1151 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT)); |
a0d0e21e |
1152 | return TRUE; |
1153 | } |
1154 | } |
a6006777 |
1155 | /* Here we have no table: */ |
774d564b |
1156 | no_table: |
a6006777 |
1157 | AMT_AMAGIC_off(&amt); |
1158 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS)); |
a0d0e21e |
1159 | return FALSE; |
1160 | } |
1161 | |
a0d0e21e |
1162 | SV* |
8ac85365 |
1163 | amagic_call(SV *left, SV *right, int method, int flags) |
a0d0e21e |
1164 | { |
11343788 |
1165 | dTHR; |
a0d0e21e |
1166 | MAGIC *mg; |
1167 | CV *cv; |
1168 | CV **cvp=NULL, **ocvp=NULL; |
1169 | AMT *amtp, *oamtp; |
1170 | int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; |
ee239bfe |
1171 | int postpr = 0, force_cpy = 0, assignshift = assign ? 1 : 0; |
a0d0e21e |
1172 | HV* stash; |
1173 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
1174 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c')) |
a6006777 |
1175 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1176 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1177 | : (CV **) NULL)) |
748a9306 |
1178 | && ((cv = cvp[off=method+assignshift]) |
1179 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
1180 | * usual method */ |
1181 | (fl = 1, cv = cvp[off=method])))) { |
a0d0e21e |
1182 | lr = -1; /* Call method for left argument */ |
1183 | } else { |
1184 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
1185 | int logic; |
1186 | |
1187 | /* look for substituted methods */ |
ee239bfe |
1188 | /* In all the covered cases we should be called with assign==0. */ |
a0d0e21e |
1189 | switch (method) { |
1190 | case inc_amg: |
ee239bfe |
1191 | force_cpy = 1; |
1192 | if ((cv = cvp[off=add_ass_amg]) |
1193 | || ((cv = cvp[off = add_amg]) && (force_cpy = 0, postpr = 1))) { |
3280af22 |
1194 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1195 | } |
1196 | break; |
1197 | case dec_amg: |
ee239bfe |
1198 | force_cpy = 1; |
1199 | if ((cv = cvp[off = subtr_ass_amg]) |
1200 | || ((cv = cvp[off = subtr_amg]) && (force_cpy = 0, postpr=1))) { |
3280af22 |
1201 | right = &PL_sv_yes; lr = -1; assign = 1; |
a0d0e21e |
1202 | } |
1203 | break; |
1204 | case bool__amg: |
1205 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
1206 | break; |
1207 | case numer_amg: |
1208 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
1209 | break; |
1210 | case string_amg: |
1211 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
1212 | break; |
dc437b57 |
1213 | case not_amg: |
1214 | (void)((cv = cvp[off=bool__amg]) |
1215 | || (cv = cvp[off=numer_amg]) |
1216 | || (cv = cvp[off=string_amg])); |
1217 | postpr = 1; |
1218 | break; |
748a9306 |
1219 | case copy_amg: |
1220 | { |
76e3520e |
1221 | /* |
1222 | * SV* ref causes confusion with the interpreter variable of |
1223 | * the same name |
1224 | */ |
1225 | SV* tmpRef=SvRV(left); |
1226 | if (!SvROK(tmpRef) && SvTYPE(tmpRef) <= SVt_PVMG) { |
fc36a67e |
1227 | /* |
1228 | * Just to be extra cautious. Maybe in some |
1229 | * additional cases sv_setsv is safe, too. |
1230 | */ |
76e3520e |
1231 | SV* newref = newSVsv(tmpRef); |
748a9306 |
1232 | SvOBJECT_on(newref); |
76e3520e |
1233 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(tmpRef)); |
748a9306 |
1234 | return newref; |
1235 | } |
1236 | } |
1237 | break; |
a0d0e21e |
1238 | case abs_amg: |
748a9306 |
1239 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
1240 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 |
1241 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
1242 | if (off1==lt_amg) { |
748a9306 |
1243 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1244 | lt_amg,AMGf_noright); |
1245 | logic = SvTRUE(lessp); |
1246 | } else { |
748a9306 |
1247 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
1248 | ncmp_amg,AMGf_noright); |
1249 | logic = (SvNV(lessp) < 0); |
1250 | } |
1251 | if (logic) { |
1252 | if (off==subtr_amg) { |
1253 | right = left; |
748a9306 |
1254 | left = nullsv; |
a0d0e21e |
1255 | lr = 1; |
1256 | } |
1257 | } else { |
1258 | return left; |
1259 | } |
1260 | } |
1261 | break; |
1262 | case neg_amg: |
1263 | if (cv = cvp[off=subtr_amg]) { |
1264 | right = left; |
1265 | left = sv_2mortal(newSViv(0)); |
1266 | lr = 1; |
1267 | } |
1268 | break; |
1269 | default: |
1270 | goto not_found; |
1271 | } |
1272 | if (!cv) goto not_found; |
1273 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
1274 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c')) |
a6006777 |
1275 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1276 | ? (amtp = (AMT*)mg->mg_ptr)->table |
8ac85365 |
1277 | : (CV **) NULL)) |
a0d0e21e |
1278 | && (cv = cvp[off=method])) { /* Method for right |
1279 | * argument found */ |
1280 | lr=1; |
748a9306 |
1281 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
4633a7c4 |
1282 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e |
1283 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1284 | && !(flags & AMGf_unary)) { |
1285 | /* We look for substitution for |
1286 | * comparison operations and |
fc36a67e |
1287 | * concatenation */ |
a0d0e21e |
1288 | if (method==concat_amg || method==concat_ass_amg |
1289 | || method==repeat_amg || method==repeat_ass_amg) { |
1290 | return NULL; /* Delegate operation to string conversion */ |
1291 | } |
1292 | off = -1; |
1293 | switch (method) { |
1294 | case lt_amg: |
1295 | case le_amg: |
1296 | case gt_amg: |
1297 | case ge_amg: |
1298 | case eq_amg: |
1299 | case ne_amg: |
1300 | postpr = 1; off=ncmp_amg; break; |
1301 | case slt_amg: |
1302 | case sle_amg: |
1303 | case sgt_amg: |
1304 | case sge_amg: |
1305 | case seq_amg: |
1306 | case sne_amg: |
1307 | postpr = 1; off=scmp_amg; break; |
1308 | } |
1309 | if (off != -1) cv = cvp[off]; |
1310 | if (!cv) { |
1311 | goto not_found; |
1312 | } |
1313 | } else { |
a6006777 |
1314 | not_found: /* No method found, either report or croak */ |
a0d0e21e |
1315 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1316 | notfound = 1; lr = -1; |
1317 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1318 | notfound = 1; lr = 1; |
1319 | } else { |
46fc3d4c |
1320 | SV *msg; |
774d564b |
1321 | if (off==-1) off=method; |
46fc3d4c |
1322 | msg = sv_2mortal(newSVpvf( |
1323 | "Operation `%s': no method found,%sargument %s%s%s%s", |
a6006777 |
1324 | AMG_names[method + assignshift], |
e7ea3e70 |
1325 | (flags & AMGf_unary ? " " : "\n\tleft "), |
a0d0e21e |
1326 | SvAMAGIC(left)? |
1327 | "in overloaded package ": |
1328 | "has no overloaded magic", |
1329 | SvAMAGIC(left)? |
1330 | HvNAME(SvSTASH(SvRV(left))): |
1331 | "", |
1332 | SvAMAGIC(right)? |
e7ea3e70 |
1333 | ",\n\tright argument in overloaded package ": |
1334 | (flags & AMGf_unary |
1335 | ? "" |
1336 | : ",\n\tright argument has no overloaded magic"), |
a0d0e21e |
1337 | SvAMAGIC(right)? |
1338 | HvNAME(SvSTASH(SvRV(right))): |
46fc3d4c |
1339 | "")); |
a0d0e21e |
1340 | if (amtp && amtp->fallback >= AMGfallYES) { |
46fc3d4c |
1341 | DEBUG_o( deb("%s", SvPVX(msg)) ); |
a0d0e21e |
1342 | } else { |
fc36a67e |
1343 | croak("%_", msg); |
a0d0e21e |
1344 | } |
1345 | return NULL; |
1346 | } |
ee239bfe |
1347 | force_cpy = force_cpy || assign; |
a0d0e21e |
1348 | } |
1349 | } |
1350 | if (!notfound) { |
774d564b |
1351 | DEBUG_o( deb( |
46fc3d4c |
1352 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
a6006777 |
1353 | AMG_names[off], |
748a9306 |
1354 | method+assignshift==off? "" : |
1355 | " (initially `", |
1356 | method+assignshift==off? "" : |
a6006777 |
1357 | AMG_names[method+assignshift], |
748a9306 |
1358 | method+assignshift==off? "" : "')", |
1359 | flags & AMGf_unary? "" : |
1360 | lr==1 ? " for right argument": " for left argument", |
1361 | flags & AMGf_unary? " for argument" : "", |
a0d0e21e |
1362 | HvNAME(stash), |
1363 | fl? ",\n\tassignment variant used": "") ); |
ee239bfe |
1364 | } |
748a9306 |
1365 | /* Since we use shallow copy during assignment, we need |
1366 | * to dublicate the contents, probably calling user-supplied |
1367 | * version of copy operator |
1368 | */ |
ee239bfe |
1369 | /* We need to copy in following cases: |
1370 | * a) Assignment form was called. |
1371 | * assignshift==1, assign==T, method + 1 == off |
1372 | * b) Increment or decrement, called directly. |
1373 | * assignshift==0, assign==0, method + 0 == off |
1374 | * c) Increment or decrement, translated to assignment add/subtr. |
1375 | * assignshift==0, assign==T, |
1376 | * force_cpy == T |
1377 | * d) Increment or decrement, translated to nomethod. |
1378 | * assignshift==0, assign==0, |
1379 | * force_cpy == T |
1380 | * e) Assignment form translated to nomethod. |
1381 | * assignshift==1, assign==T, method + 1 != off |
1382 | * force_cpy == T |
1383 | */ |
1384 | /* off is method, method+assignshift, or a result of opcode substitution. |
1385 | * In the latter case assignshift==0, so only notfound case is important. |
1386 | */ |
1387 | if (( (method + assignshift == off) |
1388 | && (assign || (method == inc_amg) || (method == dec_amg))) |
1389 | || force_cpy) |
1390 | RvDEEPCP(left); |
a0d0e21e |
1391 | { |
1392 | dSP; |
1393 | BINOP myop; |
1394 | SV* res; |
54310121 |
1395 | bool oldcatch = CATCH_GET; |
a0d0e21e |
1396 | |
54310121 |
1397 | CATCH_SET(TRUE); |
a0d0e21e |
1398 | Zero(&myop, 1, BINOP); |
1399 | myop.op_last = (OP *) &myop; |
1400 | myop.op_next = Nullop; |
54310121 |
1401 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e |
1402 | |
e788e7d3 |
1403 | PUSHSTACKi(PERLSI_OVERLOAD); |
a0d0e21e |
1404 | ENTER; |
462e5cf6 |
1405 | SAVEOP(); |
533c011a |
1406 | PL_op = (OP *) &myop; |
3280af22 |
1407 | if (PERLDB_SUB && PL_curstash != PL_debstash) |
533c011a |
1408 | PL_op->op_private |= OPpENTERSUB_DB; |
a0d0e21e |
1409 | PUTBACK; |
11343788 |
1410 | pp_pushmark(ARGS); |
a0d0e21e |
1411 | |
924508f0 |
1412 | EXTEND(SP, notfound + 5); |
a0d0e21e |
1413 | PUSHs(lr>0? right: left); |
1414 | PUSHs(lr>0? left: right); |
3280af22 |
1415 | PUSHs( lr > 0 ? &PL_sv_yes : ( assign ? &PL_sv_undef : &PL_sv_no )); |
a0d0e21e |
1416 | if (notfound) { |
a6006777 |
1417 | PUSHs( sv_2mortal(newSVpv((char *)AMG_names[method + assignshift],0)) ); |
a0d0e21e |
1418 | } |
1419 | PUSHs((SV*)cv); |
1420 | PUTBACK; |
1421 | |
533c011a |
1422 | if (PL_op = pp_entersub(ARGS)) |
76e3520e |
1423 | CALLRUNOPS(); |
a0d0e21e |
1424 | LEAVE; |
1425 | SPAGAIN; |
1426 | |
1427 | res=POPs; |
d3acc0f7 |
1428 | POPSTACK; |
54310121 |
1429 | CATCH_SET(oldcatch); |
a0d0e21e |
1430 | |
a0d0e21e |
1431 | if (postpr) { |
1432 | int ans; |
1433 | switch (method) { |
1434 | case le_amg: |
1435 | case sle_amg: |
1436 | ans=SvIV(res)<=0; break; |
1437 | case lt_amg: |
1438 | case slt_amg: |
1439 | ans=SvIV(res)<0; break; |
1440 | case ge_amg: |
1441 | case sge_amg: |
1442 | ans=SvIV(res)>=0; break; |
1443 | case gt_amg: |
1444 | case sgt_amg: |
1445 | ans=SvIV(res)>0; break; |
1446 | case eq_amg: |
1447 | case seq_amg: |
1448 | ans=SvIV(res)==0; break; |
1449 | case ne_amg: |
1450 | case sne_amg: |
1451 | ans=SvIV(res)!=0; break; |
1452 | case inc_amg: |
1453 | case dec_amg: |
bbce6d69 |
1454 | SvSetSV(left,res); return left; |
dc437b57 |
1455 | case not_amg: |
44a8e56a |
1456 | ans=!SvOK(res); break; |
a0d0e21e |
1457 | } |
54310121 |
1458 | return boolSV(ans); |
748a9306 |
1459 | } else if (method==copy_amg) { |
1460 | if (!SvROK(res)) { |
a6006777 |
1461 | croak("Copy method did not return a reference"); |
748a9306 |
1462 | } |
1463 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1464 | } else { |
1465 | return res; |
1466 | } |
1467 | } |
1468 | } |
1469 | #endif /* OVERLOAD */ |
4e35701f |
1470 | |