Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | /* gv.c |
79072805 | 2 | * |
9607fc9c | 3 | * Copyright (c) 1991-1997, Larry Wall |
79072805 LW |
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 LW |
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 LW |
17 | */ |
18 | ||
19 | #include "EXTERN.h" | |
20 | #include "perl.h" | |
21 | ||
71be2cbc | 22 | EXT char rcsid[]; |
93a17b20 | 23 | |
79072805 LW |
24 | GV * |
25 | gv_AVadd(gv) | |
26 | register GV *gv; | |
27 | { | |
a0d0e21e LW |
28 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
29 | croak("Bad symbol for array"); | |
79072805 LW |
30 | if (!GvAV(gv)) |
31 | GvAV(gv) = newAV(); | |
32 | return gv; | |
33 | } | |
34 | ||
35 | GV * | |
36 | gv_HVadd(gv) | |
37 | register GV *gv; | |
38 | { | |
a0d0e21e LW |
39 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
40 | croak("Bad symbol for hash"); | |
79072805 | 41 | if (!GvHV(gv)) |
463ee0b2 | 42 | GvHV(gv) = newHV(); |
79072805 LW |
43 | return gv; |
44 | } | |
45 | ||
46 | GV * | |
a0d0e21e LW |
47 | gv_IOadd(gv) |
48 | register GV *gv; | |
49 | { | |
50 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) | |
51 | croak("Bad symbol for filehandle"); | |
52 | if (!GvIOp(gv)) | |
53 | GvIOp(gv) = newIO(); | |
54 | return gv; | |
55 | } | |
56 | ||
57 | GV * | |
79072805 LW |
58 | gv_fetchfile(name) |
59 | char *name; | |
60 | { | |
61 | char tmpbuf[1200]; | |
8ebc5c01 | 62 | STRLEN tmplen; |
79072805 LW |
63 | GV *gv; |
64 | ||
8ebc5c01 | 65 | sprintf(tmpbuf, "_<%s", name); |
66 | tmplen = strlen(tmpbuf); | |
67 | gv = *(GV**)hv_fetch(defstash, tmpbuf, tmplen, TRUE); | |
68 | if (!isGV(gv)) | |
69 | gv_init(gv, defstash, tmpbuf, tmplen, FALSE); | |
79072805 | 70 | sv_setpv(GvSV(gv), name); |
8ebc5c01 | 71 | if (*name == '/' && (instr(name, "/lib/") || instr(name, ".pm"))) |
a5f75d66 | 72 | GvMULTI_on(gv); |
79072805 | 73 | if (perldb) |
93a17b20 | 74 | hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L'); |
79072805 LW |
75 | return gv; |
76 | } | |
77 | ||
463ee0b2 LW |
78 | void |
79 | gv_init(gv, stash, name, len, multi) | |
80 | GV *gv; | |
81 | HV *stash; | |
82 | char *name; | |
83 | STRLEN len; | |
84 | int multi; | |
85 | { | |
86 | register GP *gp; | |
87 | ||
dc437b57 | 88 | sv_upgrade((SV*)gv, SVt_PVGV); |
463ee0b2 LW |
89 | if (SvLEN(gv)) |
90 | Safefree(SvPVX(gv)); | |
44a8e56a | 91 | Newz(602, gp, 1, GP); |
8990e307 | 92 | GvGP(gv) = gp_ref(gp); |
463ee0b2 LW |
93 | GvSV(gv) = NEWSV(72,0); |
94 | GvLINE(gv) = curcop->cop_line; | |
8990e307 | 95 | GvFILEGV(gv) = curcop->cop_filegv; |
463ee0b2 LW |
96 | GvEGV(gv) = gv; |
97 | sv_magic((SV*)gv, (SV*)gv, '*', name, len); | |
98 | GvSTASH(gv) = stash; | |
a0d0e21e | 99 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 LW |
100 | GvNAMELEN(gv) = len; |
101 | if (multi) | |
a5f75d66 | 102 | GvMULTI_on(gv); |
463ee0b2 LW |
103 | } |
104 | ||
a0d0e21e LW |
105 | static void |
106 | gv_init_sv(gv, sv_type) | |
107 | GV* gv; | |
108 | I32 sv_type; | |
109 | { | |
110 | switch (sv_type) { | |
111 | case SVt_PVIO: | |
112 | (void)GvIOn(gv); | |
113 | break; | |
114 | case SVt_PVAV: | |
115 | (void)GvAVn(gv); | |
116 | break; | |
117 | case SVt_PVHV: | |
118 | (void)GvHVn(gv); | |
119 | break; | |
120 | } | |
121 | } | |
122 | ||
79072805 | 123 | GV * |
a0d0e21e | 124 | gv_fetchmeth(stash, name, len, level) |
79072805 LW |
125 | HV* stash; |
126 | char* name; | |
463ee0b2 | 127 | STRLEN len; |
a0d0e21e | 128 | I32 level; |
79072805 LW |
129 | { |
130 | AV* av; | |
463ee0b2 | 131 | GV* topgv; |
79072805 | 132 | GV* gv; |
463ee0b2 | 133 | GV** gvp; |
748a9306 | 134 | CV* cv; |
a0d0e21e LW |
135 | |
136 | if (!stash) | |
137 | return 0; | |
44a8e56a | 138 | if ((level > 100) || (level < -100)) |
a0d0e21e | 139 | croak("Recursive inheritance detected"); |
463ee0b2 | 140 | |
463ee0b2 | 141 | DEBUG_o( deb("Looking for method %s in package %s\n",name,HvNAME(stash)) ); |
44a8e56a | 142 | |
143 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); | |
144 | if (!gvp) | |
145 | topgv = Nullgv; | |
146 | else { | |
147 | topgv = *gvp; | |
148 | if (SvTYPE(topgv) != SVt_PVGV) | |
149 | gv_init(topgv, stash, name, len, TRUE); | |
150 | if (cv = GvCV(topgv)) { | |
151 | /* If genuine method or valid cache entry, use it */ | |
152 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) >= sub_generation) | |
7a4c00b4 | 153 | return topgv; |
44a8e56a | 154 | /* Stale cached entry: junk it */ |
155 | SvREFCNT_dec(cv); | |
156 | GvCV(topgv) = cv = Nullcv; | |
157 | GvCVGEN(topgv) = 0; | |
748a9306 | 158 | } |
463ee0b2 | 159 | } |
79072805 | 160 | |
9607fc9c | 161 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
162 | av = (gvp && (gv = *gvp) && gv != (GV*)&sv_undef) ? GvAV(gv) : Nullav; | |
163 | ||
164 | /* create @.*::SUPER::ISA on demand */ | |
165 | if (!av) { | |
166 | char* packname = HvNAME(stash); | |
167 | STRLEN packlen = strlen(packname); | |
168 | ||
169 | if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) { | |
170 | HV* basestash; | |
171 | ||
172 | packlen -= 7; | |
173 | basestash = gv_stashpvn(packname, packlen, TRUE); | |
174 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); | |
175 | if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) { | |
176 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); | |
177 | if (!gvp || !(gv = *gvp)) | |
178 | croak("Cannot create %s::ISA", HvNAME(stash)); | |
179 | if (SvTYPE(gv) != SVt_PVGV) | |
180 | gv_init(gv, stash, "ISA", 3, TRUE); | |
181 | SvREFCNT_dec(GvAV(gv)); | |
182 | GvAV(gv) = (AV*)SvREFCNT_inc(av); | |
183 | } | |
184 | } | |
185 | } | |
186 | ||
187 | if (av) { | |
79072805 LW |
188 | SV** svp = AvARRAY(av); |
189 | I32 items = AvFILL(av) + 1; | |
190 | while (items--) { | |
79072805 | 191 | SV* sv = *svp++; |
a0d0e21e | 192 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 | 193 | if (!basestash) { |
79072805 | 194 | if (dowarn) |
a0d0e21e | 195 | warn("Can't locate package %s for @%s::ISA", |
463ee0b2 | 196 | SvPVX(sv), HvNAME(stash)); |
79072805 LW |
197 | continue; |
198 | } | |
44a8e56a | 199 | gv = gv_fetchmeth(basestash, name, len, |
200 | (level >= 0) ? level + 1 : level - 1); | |
201 | if (gv) | |
202 | goto gotcha; | |
79072805 LW |
203 | } |
204 | } | |
a0d0e21e | 205 | |
9607fc9c | 206 | /* if at top level, try UNIVERSAL */ |
207 | ||
44a8e56a | 208 | if (level == 0 || level == -1) { |
9607fc9c | 209 | HV* lastchance; |
210 | ||
dc437b57 | 211 | if (lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE)) { |
44a8e56a | 212 | if (gv = gv_fetchmeth(lastchance, name, len, |
213 | (level >= 0) ? level + 1 : level - 1)) { | |
214 | gotcha: | |
dc848c6f | 215 | /* |
216 | * Cache method in topgv if: | |
217 | * 1. topgv has no synonyms (else inheritance crosses wires) | |
218 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) | |
219 | */ | |
220 | if (topgv && | |
221 | GvREFCNT(topgv) == 1 && | |
222 | (cv = GvCV(gv)) && | |
223 | (CvROOT(cv) || CvXSUB(cv))) | |
224 | { | |
44a8e56a | 225 | if (cv = GvCV(topgv)) |
226 | SvREFCNT_dec(cv); | |
227 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); | |
228 | GvCVGEN(topgv) = sub_generation; | |
229 | } | |
a0d0e21e LW |
230 | return gv; |
231 | } | |
232 | } | |
233 | } | |
234 | ||
79072805 LW |
235 | return 0; |
236 | } | |
237 | ||
238 | GV * | |
463ee0b2 LW |
239 | gv_fetchmethod(stash, name) |
240 | HV* stash; | |
241 | char* name; | |
242 | { | |
dc848c6f | 243 | return gv_fetchmethod_autoload(stash, name, TRUE); |
244 | } | |
245 | ||
246 | GV * | |
247 | gv_fetchmethod_autoload(stash, name, autoload) | |
248 | HV* stash; | |
249 | char* name; | |
250 | I32 autoload; | |
251 | { | |
463ee0b2 | 252 | register char *nend; |
a0d0e21e LW |
253 | char *nsplit = 0; |
254 | GV* gv; | |
463ee0b2 LW |
255 | |
256 | for (nend = name; *nend; nend++) { | |
9607fc9c | 257 | if (*nend == '\'') |
a0d0e21e | 258 | nsplit = nend; |
9607fc9c | 259 | else if (*nend == ':' && *(nend + 1) == ':') |
260 | nsplit = ++nend; | |
a0d0e21e LW |
261 | } |
262 | if (nsplit) { | |
a0d0e21e LW |
263 | char *origname = name; |
264 | name = nsplit + 1; | |
a0d0e21e LW |
265 | if (*nsplit == ':') |
266 | --nsplit; | |
9607fc9c | 267 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
268 | /* ->SUPER::method should really be looked up in original stash */ | |
269 | SV *tmpstr = sv_2mortal(newSVpv(HvNAME(curcop->cop_stash), 0)); | |
4633a7c4 | 270 | sv_catpvn(tmpstr, "::SUPER", 7); |
9607fc9c | 271 | stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); |
272 | DEBUG_o( deb("Treating %s as %s::%s\n", | |
273 | origname, HvNAME(stash), name) ); | |
4633a7c4 | 274 | } |
9607fc9c | 275 | else |
276 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); | |
4633a7c4 LW |
277 | } |
278 | ||
9607fc9c | 279 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e | 280 | if (!gv) { |
702887b4 | 281 | if (strEQ(name,"import")) |
dc437b57 | 282 | gv = (GV*)&sv_yes; |
dc848c6f | 283 | else if (autoload) |
54310121 | 284 | gv = gv_autoload4(stash, name, nend - name, TRUE); |
463ee0b2 | 285 | } |
dc848c6f | 286 | else if (autoload) { |
287 | CV* cv = GvCV(gv); | |
09280a33 CS |
288 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
289 | GV* stubgv; | |
290 | GV* autogv; | |
291 | ||
292 | if (CvANON(cv)) | |
293 | stubgv = gv; | |
294 | else { | |
295 | stubgv = CvGV(cv); | |
296 | if (GvCV(stubgv) != cv) /* orphaned import */ | |
297 | stubgv = gv; | |
298 | } | |
299 | autogv = gv_autoload4(GvSTASH(stubgv), | |
300 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); | |
dc848c6f | 301 | if (autogv) |
302 | gv = autogv; | |
303 | } | |
304 | } | |
44a8e56a | 305 | |
306 | return gv; | |
307 | } | |
308 | ||
309 | GV* | |
54310121 | 310 | gv_autoload4(stash, name, len, method) |
44a8e56a | 311 | HV* stash; |
312 | char* name; | |
313 | STRLEN len; | |
54310121 | 314 | I32 method; |
44a8e56a | 315 | { |
316 | static char autoload[] = "AUTOLOAD"; | |
317 | static STRLEN autolen = 8; | |
318 | GV* gv; | |
319 | CV* cv; | |
320 | HV* varstash; | |
321 | GV* vargv; | |
322 | SV* varsv; | |
323 | ||
324 | if (len == autolen && strnEQ(name, autoload, autolen)) | |
325 | return Nullgv; | |
dc848c6f | 326 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
327 | return Nullgv; | |
328 | cv = GvCV(gv); | |
329 | ||
330 | /* | |
331 | * Inheriting AUTOLOAD for non-methods works ... for now. | |
332 | */ | |
333 | if (dowarn && !method && (GvCVGEN(gv) || GvSTASH(gv) != stash)) | |
334 | warn( | |
335 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", | |
336 | HvNAME(stash), (int)len, name); | |
44a8e56a | 337 | |
338 | /* | |
339 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. | |
340 | * The subroutine's original name may not be "AUTOLOAD", so we don't | |
341 | * use that, but for lack of anything better we will use the sub's | |
342 | * original package to look up $AUTOLOAD. | |
343 | */ | |
344 | varstash = GvSTASH(CvGV(cv)); | |
345 | vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); | |
346 | if (!isGV(vargv)) | |
347 | gv_init(vargv, varstash, autoload, autolen, FALSE); | |
348 | varsv = GvSV(vargv); | |
349 | sv_setpv(varsv, HvNAME(stash)); | |
350 | sv_catpvn(varsv, "::", 2); | |
351 | sv_catpvn(varsv, name, len); | |
352 | SvTAINTED_off(varsv); | |
a0d0e21e LW |
353 | return gv; |
354 | } | |
355 | ||
356 | HV* | |
357 | gv_stashpv(name,create) | |
358 | char *name; | |
359 | I32 create; | |
360 | { | |
dc437b57 | 361 | return gv_stashpvn(name, strlen(name), create); |
362 | } | |
363 | ||
364 | HV* | |
365 | gv_stashpvn(name,namelen,create) | |
366 | char *name; | |
367 | U32 namelen; | |
368 | I32 create; | |
369 | { | |
370 | char tmpbuf[1203]; | |
a0d0e21e LW |
371 | HV *stash; |
372 | GV *tmpgv; | |
dc437b57 | 373 | |
374 | if (namelen > 1200) { | |
375 | namelen = 1200; | |
376 | #ifdef VMS | |
377 | warn("Weird package name \"%s\" truncated", name); | |
378 | #else | |
ff0cee69 | 379 | warn("Weird package name \"%.*s...\" truncated", (int)namelen, name); |
dc437b57 | 380 | #endif |
381 | } | |
382 | Copy(name,tmpbuf,namelen,char); | |
383 | tmpbuf[namelen++] = ':'; | |
384 | tmpbuf[namelen++] = ':'; | |
385 | tmpbuf[namelen] = '\0'; | |
a0d0e21e LW |
386 | tmpgv = gv_fetchpv(tmpbuf,create, SVt_PVHV); |
387 | if (!tmpgv) | |
388 | return 0; | |
389 | if (!GvHV(tmpgv)) | |
390 | GvHV(tmpgv) = newHV(); | |
391 | stash = GvHV(tmpgv); | |
392 | if (!HvNAME(stash)) | |
393 | HvNAME(stash) = savepv(name); | |
394 | return stash; | |
463ee0b2 LW |
395 | } |
396 | ||
a0d0e21e LW |
397 | HV* |
398 | gv_stashsv(sv,create) | |
399 | SV *sv; | |
400 | I32 create; | |
401 | { | |
dc437b57 | 402 | register char *ptr; |
403 | STRLEN len; | |
404 | ptr = SvPV(sv,len); | |
405 | return gv_stashpvn(ptr, len, create); | |
a0d0e21e LW |
406 | } |
407 | ||
408 | ||
463ee0b2 | 409 | GV * |
a0d0e21e | 410 | gv_fetchpv(nambeg,add,sv_type) |
463ee0b2 | 411 | char *nambeg; |
79072805 | 412 | I32 add; |
a0d0e21e | 413 | I32 sv_type; |
79072805 | 414 | { |
463ee0b2 LW |
415 | register char *name = nambeg; |
416 | register GV *gv = 0; | |
79072805 | 417 | GV**gvp; |
79072805 LW |
418 | I32 len; |
419 | register char *namend; | |
463ee0b2 | 420 | HV *stash = 0; |
9607fc9c | 421 | U32 add_gvflags = 0; |
85e6fe83 | 422 | char *tmpbuf; |
79072805 | 423 | |
c07a80fd | 424 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
425 | name++; | |
426 | ||
79072805 | 427 | for (namend = name; *namend; namend++) { |
463ee0b2 LW |
428 | if ((*namend == '\'' && namend[1]) || |
429 | (*namend == ':' && namend[1] == ':')) | |
430 | { | |
463ee0b2 LW |
431 | if (!stash) |
432 | stash = defstash; | |
dc437b57 | 433 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e | 434 | return Nullgv; |
463ee0b2 | 435 | |
85e6fe83 LW |
436 | len = namend - name; |
437 | if (len > 0) { | |
a0d0e21e LW |
438 | New(601, tmpbuf, len+3, char); |
439 | Copy(name, tmpbuf, len, char); | |
440 | tmpbuf[len++] = ':'; | |
441 | tmpbuf[len++] = ':'; | |
442 | tmpbuf[len] = '\0'; | |
463ee0b2 | 443 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
85e6fe83 | 444 | Safefree(tmpbuf); |
463ee0b2 LW |
445 | if (!gvp || *gvp == (GV*)&sv_undef) |
446 | return Nullgv; | |
447 | gv = *gvp; | |
85e6fe83 | 448 | |
463ee0b2 | 449 | if (SvTYPE(gv) == SVt_PVGV) |
a5f75d66 | 450 | GvMULTI_on(gv); |
a0d0e21e LW |
451 | else if (!add) |
452 | return Nullgv; | |
463ee0b2 LW |
453 | else |
454 | gv_init(gv, stash, nambeg, namend - nambeg, (add & 2)); | |
85e6fe83 | 455 | |
463ee0b2 LW |
456 | if (!(stash = GvHV(gv))) |
457 | stash = GvHV(gv) = newHV(); | |
85e6fe83 | 458 | |
463ee0b2 | 459 | if (!HvNAME(stash)) |
a0d0e21e | 460 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 LW |
461 | } |
462 | ||
463 | if (*namend == ':') | |
464 | namend++; | |
465 | namend++; | |
466 | name = namend; | |
467 | if (!*name) | |
dc437b57 | 468 | return gv ? gv : (GV*)*hv_fetch(defstash, "main::", 6, TRUE); |
79072805 | 469 | } |
79072805 | 470 | } |
a0d0e21e LW |
471 | len = namend - name; |
472 | if (!len) | |
473 | len = 1; | |
463ee0b2 LW |
474 | |
475 | /* No stash in name, so see how we can default */ | |
476 | ||
477 | if (!stash) { | |
478 | if (isIDFIRST(*name)) { | |
9607fc9c | 479 | bool global = FALSE; |
480 | ||
463ee0b2 LW |
481 | if (isUPPER(*name)) { |
482 | if (*name > 'I') { | |
483 | if (*name == 'S' && ( | |
484 | strEQ(name, "SIG") || | |
485 | strEQ(name, "STDIN") || | |
486 | strEQ(name, "STDOUT") || | |
487 | strEQ(name, "STDERR") )) | |
488 | global = TRUE; | |
489 | } | |
490 | else if (*name > 'E') { | |
491 | if (*name == 'I' && strEQ(name, "INC")) | |
492 | global = TRUE; | |
493 | } | |
494 | else if (*name > 'A') { | |
495 | if (*name == 'E' && strEQ(name, "ENV")) | |
496 | global = TRUE; | |
497 | } | |
498 | else if (*name == 'A' && ( | |
499 | strEQ(name, "ARGV") || | |
500 | strEQ(name, "ARGVOUT") )) | |
501 | global = TRUE; | |
502 | } | |
503 | else if (*name == '_' && !name[1]) | |
504 | global = TRUE; | |
9607fc9c | 505 | |
463ee0b2 LW |
506 | if (global) |
507 | stash = defstash; | |
85e6fe83 | 508 | else if ((COP*)curcop == &compiling) { |
a0d0e21e | 509 | stash = curstash; |
748a9306 LW |
510 | if (add && (hints & HINT_STRICT_VARS) && |
511 | sv_type != SVt_PVCV && | |
512 | sv_type != SVt_PVGV && | |
4633a7c4 | 513 | sv_type != SVt_PVFM && |
c07a80fd | 514 | sv_type != SVt_PVIO && |
377b8fbc | 515 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
748a9306 | 516 | { |
4633a7c4 LW |
517 | gvp = (GV**)hv_fetch(stash,name,len,0); |
518 | if (!gvp || | |
a5f75d66 AD |
519 | *gvp == (GV*)&sv_undef || |
520 | SvTYPE(*gvp) != SVt_PVGV) | |
521 | { | |
4633a7c4 | 522 | stash = 0; |
a5f75d66 AD |
523 | } |
524 | else if (sv_type == SVt_PV && !GvIMPORTED_SV(*gvp) || | |
525 | sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp) || | |
526 | sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp) ) | |
4633a7c4 | 527 | { |
a5f75d66 | 528 | warn("Variable \"%c%s\" is not imported", |
4633a7c4 LW |
529 | sv_type == SVt_PVAV ? '@' : |
530 | sv_type == SVt_PVHV ? '%' : '$', | |
531 | name); | |
8ebc5c01 | 532 | if (GvCVu(*gvp)) |
4633a7c4 | 533 | warn("(Did you mean &%s instead?)\n", name); |
a0d0e21e | 534 | stash = 0; |
4633a7c4 | 535 | } |
a0d0e21e | 536 | } |
85e6fe83 | 537 | } |
463ee0b2 LW |
538 | else |
539 | stash = curcop->cop_stash; | |
540 | } | |
541 | else | |
542 | stash = defstash; | |
543 | } | |
544 | ||
545 | /* By this point we should have a stash and a name */ | |
546 | ||
a0d0e21e LW |
547 | if (!stash) { |
548 | if (add) { | |
549 | warn("Global symbol \"%s\" requires explicit package name", name); | |
550 | ++error_count; | |
551 | stash = curstash ? curstash : defstash; /* avoid core dumps */ | |
9607fc9c | 552 | add_gvflags = ((sv_type == SVt_PV) ? GVf_IMPORTED_SV |
553 | : (sv_type == SVt_PVAV) ? GVf_IMPORTED_AV | |
554 | : (sv_type == SVt_PVHV) ? GVf_IMPORTED_HV | |
555 | : 0); | |
a0d0e21e LW |
556 | } |
557 | else | |
558 | return Nullgv; | |
559 | } | |
560 | ||
561 | if (!SvREFCNT(stash)) /* symbol table under destruction */ | |
562 | return Nullgv; | |
563 | ||
79072805 LW |
564 | gvp = (GV**)hv_fetch(stash,name,len,add); |
565 | if (!gvp || *gvp == (GV*)&sv_undef) | |
566 | return Nullgv; | |
567 | gv = *gvp; | |
568 | if (SvTYPE(gv) == SVt_PVGV) { | |
a0d0e21e | 569 | if (add) { |
a5f75d66 | 570 | GvMULTI_on(gv); |
a0d0e21e LW |
571 | gv_init_sv(gv, sv_type); |
572 | } | |
79072805 LW |
573 | return gv; |
574 | } | |
93a17b20 LW |
575 | |
576 | /* Adding a new symbol */ | |
577 | ||
a0d0e21e LW |
578 | if (add & 4) |
579 | warn("Had to create %s unexpectedly", nambeg); | |
463ee0b2 | 580 | gv_init(gv, stash, name, len, add & 2); |
a0d0e21e | 581 | gv_init_sv(gv, sv_type); |
9607fc9c | 582 | GvFLAGS(gv) |= add_gvflags; |
93a17b20 LW |
583 | |
584 | /* set up magic where warranted */ | |
585 | switch (*name) { | |
a0d0e21e LW |
586 | case 'A': |
587 | if (strEQ(name, "ARGV")) { | |
588 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; | |
589 | } | |
590 | break; | |
591 | ||
ed6116ce LW |
592 | case 'a': |
593 | case 'b': | |
594 | if (len == 1) | |
a5f75d66 | 595 | GvMULTI_on(gv); |
ed6116ce | 596 | break; |
a0d0e21e LW |
597 | case 'E': |
598 | if (strnEQ(name, "EXPORT", 6)) | |
a5f75d66 | 599 | GvMULTI_on(gv); |
a0d0e21e | 600 | break; |
463ee0b2 LW |
601 | case 'I': |
602 | if (strEQ(name, "ISA")) { | |
603 | AV* av = GvAVn(gv); | |
a5f75d66 | 604 | GvMULTI_on(gv); |
a0d0e21e LW |
605 | sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0); |
606 | if (add & 2 && strEQ(nambeg,"AnyDBM_File::ISA") && AvFILL(av) == -1) | |
85e6fe83 | 607 | { |
a0d0e21e LW |
608 | char *pname; |
609 | av_push(av, newSVpv(pname = "NDBM_File",0)); | |
dc437b57 | 610 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e | 611 | av_push(av, newSVpv(pname = "DB_File",0)); |
dc437b57 | 612 | gv_stashpvn(pname, 7, TRUE); |
a0d0e21e | 613 | av_push(av, newSVpv(pname = "GDBM_File",0)); |
dc437b57 | 614 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e | 615 | av_push(av, newSVpv(pname = "SDBM_File",0)); |
dc437b57 | 616 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e | 617 | av_push(av, newSVpv(pname = "ODBM_File",0)); |
dc437b57 | 618 | gv_stashpvn(pname, 9, TRUE); |
85e6fe83 | 619 | } |
463ee0b2 LW |
620 | } |
621 | break; | |
a0d0e21e LW |
622 | #ifdef OVERLOAD |
623 | case 'O': | |
624 | if (strEQ(name, "OVERLOAD")) { | |
625 | HV* hv = GvHVn(gv); | |
a5f75d66 | 626 | GvMULTI_on(gv); |
a0d0e21e LW |
627 | sv_magic((SV*)hv, (SV*)gv, 'A', 0, 0); |
628 | } | |
629 | break; | |
630 | #endif /* OVERLOAD */ | |
93a17b20 LW |
631 | case 'S': |
632 | if (strEQ(name, "SIG")) { | |
633 | HV *hv; | |
dc437b57 | 634 | I32 i; |
93a17b20 | 635 | siggv = gv; |
a5f75d66 | 636 | GvMULTI_on(siggv); |
93a17b20 LW |
637 | hv = GvHVn(siggv); |
638 | hv_magic(hv, siggv, 'S'); | |
dc437b57 | 639 | for(i=1;sig_name[i];i++) { |
640 | SV ** init; | |
641 | init=hv_fetch(hv,sig_name[i],strlen(sig_name[i]),1); | |
642 | if(init) | |
643 | sv_setsv(*init,&sv_undef); | |
644 | psig_ptr[i] = 0; | |
645 | psig_name[i] = 0; | |
646 | } | |
93a17b20 LW |
647 | /* initialize signal stack */ |
648 | signalstack = newAV(); | |
93a17b20 | 649 | AvREAL_off(signalstack); |
a0d0e21e LW |
650 | av_extend(signalstack, 30); |
651 | av_fill(signalstack, 0); | |
93a17b20 LW |
652 | } |
653 | break; | |
654 | ||
655 | case '&': | |
463ee0b2 LW |
656 | if (len > 1) |
657 | break; | |
93a17b20 LW |
658 | ampergv = gv; |
659 | sawampersand = TRUE; | |
a0d0e21e | 660 | goto ro_magicalize; |
93a17b20 LW |
661 | |
662 | case '`': | |
463ee0b2 LW |
663 | if (len > 1) |
664 | break; | |
93a17b20 LW |
665 | leftgv = gv; |
666 | sawampersand = TRUE; | |
a0d0e21e | 667 | goto ro_magicalize; |
93a17b20 LW |
668 | |
669 | case '\'': | |
463ee0b2 LW |
670 | if (len > 1) |
671 | break; | |
93a17b20 LW |
672 | rightgv = gv; |
673 | sawampersand = TRUE; | |
a0d0e21e | 674 | goto ro_magicalize; |
93a17b20 LW |
675 | |
676 | case ':': | |
463ee0b2 LW |
677 | if (len > 1) |
678 | break; | |
93a17b20 LW |
679 | sv_setpv(GvSV(gv),chopset); |
680 | goto magicalize; | |
681 | ||
ff0cee69 | 682 | case '?': |
683 | if (len > 1) | |
684 | break; | |
685 | #ifdef COMPLEX_STATUS | |
686 | sv_upgrade(GvSV(gv), SVt_PVLV); | |
687 | #endif | |
688 | goto magicalize; | |
689 | ||
93a17b20 | 690 | case '#': |
a0d0e21e LW |
691 | case '*': |
692 | if (dowarn && len == 1 && sv_type == SVt_PV) | |
693 | warn("Use of $%s is deprecated", name); | |
694 | /* FALL THROUGH */ | |
695 | case '[': | |
696 | case '!': | |
93a17b20 LW |
697 | case '^': |
698 | case '~': | |
699 | case '=': | |
700 | case '-': | |
701 | case '%': | |
702 | case '.': | |
93a17b20 LW |
703 | case '(': |
704 | case ')': | |
705 | case '<': | |
706 | case '>': | |
707 | case ',': | |
708 | case '\\': | |
709 | case '/': | |
93a17b20 | 710 | case '|': |
748a9306 | 711 | case '\001': |
93a17b20 | 712 | case '\004': |
ad8898e0 | 713 | case '\005': |
748a9306 | 714 | case '\006': |
a0d0e21e | 715 | case '\010': |
ad8898e0 | 716 | case '\017': |
93a17b20 LW |
717 | case '\t': |
718 | case '\020': | |
719 | case '\024': | |
720 | case '\027': | |
463ee0b2 LW |
721 | if (len > 1) |
722 | break; | |
723 | goto magicalize; | |
724 | ||
a0d0e21e | 725 | case '+': |
463ee0b2 LW |
726 | case '1': |
727 | case '2': | |
728 | case '3': | |
729 | case '4': | |
730 | case '5': | |
731 | case '6': | |
732 | case '7': | |
733 | case '8': | |
734 | case '9': | |
a0d0e21e LW |
735 | ro_magicalize: |
736 | SvREADONLY_on(GvSV(gv)); | |
93a17b20 | 737 | magicalize: |
463ee0b2 | 738 | sv_magic(GvSV(gv), (SV*)gv, 0, name, len); |
93a17b20 LW |
739 | break; |
740 | ||
741 | case '\014': | |
463ee0b2 LW |
742 | if (len > 1) |
743 | break; | |
93a17b20 LW |
744 | sv_setpv(GvSV(gv),"\f"); |
745 | formfeed = GvSV(gv); | |
746 | break; | |
747 | case ';': | |
463ee0b2 LW |
748 | if (len > 1) |
749 | break; | |
93a17b20 LW |
750 | sv_setpv(GvSV(gv),"\034"); |
751 | break; | |
463ee0b2 LW |
752 | case ']': |
753 | if (len == 1) { | |
f86702cc | 754 | SV *sv = GvSV(gv); |
93a17b20 | 755 | sv_upgrade(sv, SVt_PVNV); |
a0d0e21e | 756 | sv_setpv(sv, patchlevel); |
f86702cc | 757 | (void)sv_2nv(sv); |
758 | SvREADONLY_on(sv); | |
93a17b20 LW |
759 | } |
760 | break; | |
79072805 | 761 | } |
93a17b20 | 762 | return gv; |
79072805 LW |
763 | } |
764 | ||
765 | void | |
f6aff53a | 766 | gv_fullname3(sv, gv, prefix) |
79072805 LW |
767 | SV *sv; |
768 | GV *gv; | |
f967eb5f | 769 | char *prefix; |
79072805 LW |
770 | { |
771 | HV *hv = GvSTASH(gv); | |
f967eb5f | 772 | if (!hv) { |
773 | SvOK_off(sv); | |
79072805 | 774 | return; |
f967eb5f | 775 | } |
776 | sv_setpv(sv, prefix ? prefix : ""); | |
79072805 | 777 | sv_catpv(sv,HvNAME(hv)); |
463ee0b2 | 778 | sv_catpvn(sv,"::", 2); |
79072805 LW |
779 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
780 | } | |
781 | ||
782 | void | |
f6aff53a | 783 | gv_efullname3(sv, gv, prefix) |
79072805 LW |
784 | SV *sv; |
785 | GV *gv; | |
f967eb5f | 786 | char *prefix; |
79072805 | 787 | { |
f967eb5f | 788 | GV *egv = GvEGV(gv); |
748a9306 LW |
789 | if (!egv) |
790 | egv = gv; | |
f6aff53a | 791 | gv_fullname3(sv, egv, prefix); |
792 | } | |
793 | ||
794 | /* XXX compatibility with versions <= 5.003. */ | |
795 | void | |
796 | gv_fullname(sv,gv) | |
797 | SV *sv; | |
798 | GV *gv; | |
799 | { | |
800 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); | |
801 | } | |
802 | ||
803 | /* XXX compatibility with versions <= 5.003. */ | |
804 | void | |
805 | gv_efullname(sv,gv) | |
806 | SV *sv; | |
807 | GV *gv; | |
808 | { | |
809 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); | |
79072805 LW |
810 | } |
811 | ||
812 | IO * | |
813 | newIO() | |
814 | { | |
815 | IO *io; | |
8990e307 LW |
816 | GV *iogv; |
817 | ||
818 | io = (IO*)NEWSV(0,0); | |
a0d0e21e | 819 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 LW |
820 | SvREFCNT(io) = 1; |
821 | SvOBJECT_on(io); | |
dc437b57 | 822 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); |
8990e307 | 823 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 LW |
824 | return io; |
825 | } | |
826 | ||
827 | void | |
463ee0b2 LW |
828 | gv_check(stash) |
829 | HV* stash; | |
79072805 LW |
830 | { |
831 | register HE *entry; | |
832 | register I32 i; | |
833 | register GV *gv; | |
463ee0b2 | 834 | HV *hv; |
a0d0e21e | 835 | GV *filegv; |
463ee0b2 | 836 | |
8990e307 LW |
837 | if (!HvARRAY(stash)) |
838 | return; | |
a0d0e21e | 839 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
dc437b57 | 840 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
841 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && | |
842 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv)) | |
a0d0e21e LW |
843 | { |
844 | if (hv != defstash) | |
845 | gv_check(hv); /* nested package */ | |
846 | } | |
dc437b57 | 847 | else if (isALPHA(*HeKEY(entry))) { |
848 | gv = (GV*)HeVAL(entry); | |
a5f75d66 | 849 | if (GvMULTI(gv)) |
463ee0b2 LW |
850 | continue; |
851 | curcop->cop_line = GvLINE(gv); | |
a0d0e21e LW |
852 | filegv = GvFILEGV(gv); |
853 | curcop->cop_filegv = filegv; | |
a5f75d66 | 854 | if (filegv && GvMULTI(filegv)) /* Filename began with slash */ |
8990e307 | 855 | continue; |
dc437b57 | 856 | warn("Name \"%s::%s\" used only once: possible typo", |
a0d0e21e | 857 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 | 858 | } |
79072805 LW |
859 | } |
860 | } | |
861 | } | |
862 | ||
863 | GV * | |
a0d0e21e LW |
864 | newGVgen(pack) |
865 | char *pack; | |
79072805 | 866 | { |
a0d0e21e | 867 | (void)sprintf(tokenbuf,"%s::_GEN_%ld",pack,(long)gensym++); |
85e6fe83 | 868 | return gv_fetchpv(tokenbuf,TRUE, SVt_PVGV); |
79072805 LW |
869 | } |
870 | ||
871 | /* hopefully this is only called on local symbol table entries */ | |
872 | ||
873 | GP* | |
874 | gp_ref(gp) | |
875 | GP* gp; | |
876 | { | |
877 | gp->gp_refcnt++; | |
44a8e56a | 878 | if (gp->gp_cv) { |
879 | if (gp->gp_cvgen) { | |
880 | /* multi-named GPs cannot be used for method cache */ | |
881 | SvREFCNT_dec(gp->gp_cv); | |
882 | gp->gp_cv = Nullcv; | |
883 | gp->gp_cvgen = 0; | |
884 | } | |
885 | else { | |
886 | /* Adding a new name to a subroutine invalidates method cache */ | |
887 | sub_generation++; | |
888 | } | |
889 | } | |
79072805 | 890 | return gp; |
79072805 LW |
891 | } |
892 | ||
893 | void | |
894 | gp_free(gv) | |
895 | GV* gv; | |
896 | { | |
79072805 | 897 | GP* gp; |
377b8fbc | 898 | CV* cv; |
79072805 LW |
899 | |
900 | if (!gv || !(gp = GvGP(gv))) | |
901 | return; | |
902 | if (gp->gp_refcnt == 0) { | |
903 | warn("Attempt to free unreferenced glob pointers"); | |
904 | return; | |
905 | } | |
44a8e56a | 906 | if (gp->gp_cv) { |
907 | /* Deleting the name of a subroutine invalidates method cache */ | |
908 | sub_generation++; | |
909 | } | |
748a9306 LW |
910 | if (--gp->gp_refcnt > 0) { |
911 | if (gp->gp_egv == gv) | |
912 | gp->gp_egv = 0; | |
79072805 | 913 | return; |
748a9306 | 914 | } |
79072805 | 915 | |
8990e307 LW |
916 | SvREFCNT_dec(gp->gp_sv); |
917 | SvREFCNT_dec(gp->gp_av); | |
918 | SvREFCNT_dec(gp->gp_hv); | |
377b8fbc | 919 | SvREFCNT_dec(gp->gp_io); |
a6006777 | 920 | SvREFCNT_dec(gp->gp_cv); |
748a9306 LW |
921 | SvREFCNT_dec(gp->gp_form); |
922 | ||
79072805 LW |
923 | Safefree(gp); |
924 | GvGP(gv) = 0; | |
925 | } | |
926 | ||
927 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) | |
928 | #define MICROPORT | |
929 | #endif | |
930 | ||
931 | #ifdef MICROPORT /* Microport 2.4 hack */ | |
932 | AV *GvAVn(gv) | |
933 | register GV *gv; | |
934 | { | |
935 | if (GvGP(gv)->gp_av) | |
936 | return GvGP(gv)->gp_av; | |
937 | else | |
938 | return GvGP(gv_AVadd(gv))->gp_av; | |
939 | } | |
940 | ||
941 | HV *GvHVn(gv) | |
942 | register GV *gv; | |
943 | { | |
944 | if (GvGP(gv)->gp_hv) | |
945 | return GvGP(gv)->gp_hv; | |
946 | else | |
947 | return GvGP(gv_HVadd(gv))->gp_hv; | |
948 | } | |
949 | #endif /* Microport 2.4 hack */ | |
a0d0e21e LW |
950 | |
951 | #ifdef OVERLOAD | |
952 | /* Updates and caches the CV's */ | |
953 | ||
954 | bool | |
955 | Gv_AMupdate(stash) | |
956 | HV* stash; | |
957 | { | |
958 | GV** gvp; | |
959 | HV* hv; | |
960 | GV* gv; | |
961 | CV* cv; | |
962 | MAGIC* mg=mg_find((SV*)stash,'c'); | |
748a9306 | 963 | AMT *amtp=mg ? (AMT*)mg->mg_ptr: NULL; |
a6006777 | 964 | AMT amt; |
a0d0e21e | 965 | |
e7ea3e70 IZ |
966 | if (mg && amtp->was_ok_am == amagic_generation |
967 | && amtp->was_ok_sub == sub_generation) | |
a6006777 | 968 | return AMT_AMAGIC(amtp); |
969 | if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */ | |
748a9306 | 970 | int i; |
a6006777 | 971 | for (i=1; i<NofAMmeth; i++) { |
748a9306 LW |
972 | if (amtp->table[i]) { |
973 | SvREFCNT_dec(amtp->table[i]); | |
974 | } | |
975 | } | |
976 | } | |
a0d0e21e LW |
977 | sv_unmagic((SV*)stash, 'c'); |
978 | ||
979 | DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) ); | |
980 | ||
a6006777 | 981 | amt.was_ok_am = amagic_generation; |
982 | amt.was_ok_sub = sub_generation; | |
983 | amt.fallback = AMGfallNO; | |
984 | amt.flags = 0; | |
985 | ||
986 | #ifdef OVERLOAD_VIA_HASH | |
987 | gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */ | |
a0d0e21e LW |
988 | if (gvp && ((gv = *gvp) != (GV*)&sv_undef && (hv = GvHV(gv)))) { |
989 | int filled=0; | |
990 | int i; | |
991 | char *cp; | |
a0d0e21e LW |
992 | SV* sv; |
993 | SV** svp; | |
a0d0e21e LW |
994 | |
995 | /* Work with "fallback" key, which we assume to be first in AMG_names */ | |
996 | ||
a6006777 | 997 | if (( cp = (char *)AMG_names[0] ) && |
998 | (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) { | |
a0d0e21e LW |
999 | if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1000 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; | |
1001 | } | |
a6006777 | 1002 | for (i = 1; i < NofAMmeth; i++) { |
1003 | cv = 0; | |
1004 | cp = (char *)AMG_names[i]; | |
1005 | ||
1006 | svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE); | |
dc437b57 | 1007 | if (svp && ((sv = *svp) != &sv_undef)) { |
a0d0e21e LW |
1008 | switch (SvTYPE(sv)) { |
1009 | default: | |
1010 | if (!SvROK(sv)) { | |
1011 | if (!SvOK(sv)) break; | |
748a9306 | 1012 | gv = gv_fetchmethod(stash, SvPV(sv, na)); |
a0d0e21e LW |
1013 | if (gv) cv = GvCV(gv); |
1014 | break; | |
1015 | } | |
1016 | cv = (CV*)SvRV(sv); | |
1017 | if (SvTYPE(cv) == SVt_PVCV) | |
1018 | break; | |
1019 | /* FALL THROUGH */ | |
1020 | case SVt_PVHV: | |
1021 | case SVt_PVAV: | |
a6006777 | 1022 | croak("Not a subroutine reference in overload table"); |
a0d0e21e LW |
1023 | return FALSE; |
1024 | case SVt_PVCV: | |
8ebc5c01 | 1025 | cv = (CV*)sv; |
1026 | break; | |
a0d0e21e | 1027 | case SVt_PVGV: |
8ebc5c01 | 1028 | if (!(cv = GvCVu((GV*)sv))) |
1029 | cv = sv_2cv(sv, &stash, &gv, TRUE); | |
1030 | break; | |
a0d0e21e LW |
1031 | } |
1032 | if (cv) filled=1; | |
1033 | else { | |
a6006777 | 1034 | croak("Method for operation %s not found in package %.256s during blessing\n", |
a0d0e21e LW |
1035 | cp,HvNAME(stash)); |
1036 | return FALSE; | |
1037 | } | |
1038 | } | |
a6006777 | 1039 | #else |
1040 | { | |
1041 | int filled = 0; | |
1042 | int i; | |
9607fc9c | 1043 | const char *cp; |
a6006777 | 1044 | SV* sv = NULL; |
1045 | SV** svp; | |
1046 | ||
1047 | /* Work with "fallback" key, which we assume to be first in AMG_names */ | |
1048 | ||
9607fc9c | 1049 | if ( cp = AMG_names[0] ) { |
a6006777 | 1050 | /* Try to find via inheritance. */ |
774d564b | 1051 | gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */ |
a6006777 | 1052 | if (gv) sv = GvSV(gv); |
1053 | ||
774d564b | 1054 | if (!gv) goto no_table; |
a6006777 | 1055 | else if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1056 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; | |
1057 | } | |
1058 | ||
1059 | for (i = 1; i < NofAMmeth; i++) { | |
1060 | cv = 0; | |
9607fc9c | 1061 | cp = AMG_names[i]; |
a6006777 | 1062 | |
774d564b | 1063 | *buf = '('; /* A cookie: "(". */ |
a6006777 | 1064 | strcpy(buf + 1, cp); |
44a8e56a | 1065 | DEBUG_o( deb("Checking overloading of `%s' in package `%.256s'\n", |
1066 | cp, HvNAME(stash)) ); | |
1067 | gv = gv_fetchmeth(stash, buf, strlen(buf), -1); /* no filling stash! */ | |
1068 | if(gv && (cv = GvCV(gv))) { | |
1069 | char *name = buf; | |
1070 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") | |
1071 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { | |
1072 | /* GvSV contains the name of the method. */ | |
1073 | GV *ngv; | |
1074 | ||
1075 | DEBUG_o( deb("Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", | |
1076 | SvPV(GvSV(gv), na), cp, HvNAME(stash)) ); | |
dc848c6f | 1077 | if (!SvPOK(GvSV(gv)) |
1078 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), | |
1079 | FALSE))) | |
1080 | { | |
44a8e56a | 1081 | /* Can be an import stub (created by `can'). */ |
1082 | if (GvCVGEN(gv)) { | |
1083 | croak("Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", | |
1084 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), | |
1085 | cp, HvNAME(stash)); | |
1086 | } else | |
1087 | croak("Cannot resolve method `%.256s' overloading `%s' in package `%.256s'", | |
1088 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), | |
1089 | cp, HvNAME(stash)); | |
1090 | } | |
dc848c6f | 1091 | name = SvPVX(GvSV(gv)); |
1092 | cv = GvCV(gv = ngv); | |
44a8e56a | 1093 | } |
1094 | DEBUG_o( deb("Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", | |
1095 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), | |
1096 | GvNAME(CvGV(cv))) ); | |
1097 | filled = 1; | |
1098 | } | |
a6006777 | 1099 | #endif |
1100 | amt.table[i]=(CV*)SvREFCNT_inc(cv); | |
a0d0e21e | 1101 | } |
a0d0e21e | 1102 | if (filled) { |
a6006777 | 1103 | AMT_AMAGIC_on(&amt); |
1104 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT)); | |
a0d0e21e LW |
1105 | return TRUE; |
1106 | } | |
1107 | } | |
a6006777 | 1108 | /* Here we have no table: */ |
774d564b | 1109 | no_table: |
a6006777 | 1110 | AMT_AMAGIC_off(&amt); |
1111 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS)); | |
a0d0e21e LW |
1112 | return FALSE; |
1113 | } | |
1114 | ||
1115 | /* During call to this subroutine stack can be reallocated. It is | |
1116 | * advised to call SPAGAIN macro in your code after call */ | |
1117 | ||
1118 | SV* | |
1119 | amagic_call(left,right,method,flags) | |
1120 | SV* left; | |
1121 | SV* right; | |
1122 | int method; | |
1123 | int flags; | |
1124 | { | |
1125 | MAGIC *mg; | |
1126 | CV *cv; | |
1127 | CV **cvp=NULL, **ocvp=NULL; | |
1128 | AMT *amtp, *oamtp; | |
1129 | int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; | |
748a9306 | 1130 | int postpr=0, inc_dec_ass=0, assignshift=assign?1:0; |
a0d0e21e LW |
1131 | HV* stash; |
1132 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) | |
1133 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c')) | |
a6006777 | 1134 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1135 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table | |
1136 | : NULL)) | |
748a9306 LW |
1137 | && ((cv = cvp[off=method+assignshift]) |
1138 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to | |
1139 | * usual method */ | |
1140 | (fl = 1, cv = cvp[off=method])))) { | |
a0d0e21e LW |
1141 | lr = -1; /* Call method for left argument */ |
1142 | } else { | |
1143 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { | |
1144 | int logic; | |
1145 | ||
1146 | /* look for substituted methods */ | |
1147 | switch (method) { | |
1148 | case inc_amg: | |
748a9306 | 1149 | if (((cv = cvp[off=add_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e LW |
1150 | || ((cv = cvp[off=add_amg]) && (postpr=1))) { |
1151 | right = &sv_yes; lr = -1; assign = 1; | |
1152 | } | |
1153 | break; | |
1154 | case dec_amg: | |
748a9306 | 1155 | if (((cv = cvp[off=subtr_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e LW |
1156 | || ((cv = cvp[off=subtr_amg]) && (postpr=1))) { |
1157 | right = &sv_yes; lr = -1; assign = 1; | |
1158 | } | |
1159 | break; | |
1160 | case bool__amg: | |
1161 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); | |
1162 | break; | |
1163 | case numer_amg: | |
1164 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); | |
1165 | break; | |
1166 | case string_amg: | |
1167 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); | |
1168 | break; | |
dc437b57 | 1169 | case not_amg: |
1170 | (void)((cv = cvp[off=bool__amg]) | |
1171 | || (cv = cvp[off=numer_amg]) | |
1172 | || (cv = cvp[off=string_amg])); | |
1173 | postpr = 1; | |
1174 | break; | |
748a9306 LW |
1175 | case copy_amg: |
1176 | { | |
1177 | SV* ref=SvRV(left); | |
1178 | if (!SvROK(ref) && SvTYPE(ref) <= SVt_PVMG) { /* Just to be | |
1179 | * extra | |
1180 | * causious, | |
1181 | * maybe in some | |
1182 | * additional | |
1183 | * cases sv_setsv | |
1184 | * is safe too */ | |
1185 | SV* newref = newSVsv(ref); | |
1186 | SvOBJECT_on(newref); | |
1187 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(ref)); | |
1188 | return newref; | |
1189 | } | |
1190 | } | |
1191 | break; | |
a0d0e21e | 1192 | case abs_amg: |
748a9306 | 1193 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e | 1194 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 | 1195 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e | 1196 | if (off1==lt_amg) { |
748a9306 | 1197 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
1198 | lt_amg,AMGf_noright); |
1199 | logic = SvTRUE(lessp); | |
1200 | } else { | |
748a9306 | 1201 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
1202 | ncmp_amg,AMGf_noright); |
1203 | logic = (SvNV(lessp) < 0); | |
1204 | } | |
1205 | if (logic) { | |
1206 | if (off==subtr_amg) { | |
1207 | right = left; | |
748a9306 | 1208 | left = nullsv; |
a0d0e21e LW |
1209 | lr = 1; |
1210 | } | |
1211 | } else { | |
1212 | return left; | |
1213 | } | |
1214 | } | |
1215 | break; | |
1216 | case neg_amg: | |
1217 | if (cv = cvp[off=subtr_amg]) { | |
1218 | right = left; | |
1219 | left = sv_2mortal(newSViv(0)); | |
1220 | lr = 1; | |
1221 | } | |
1222 | break; | |
1223 | default: | |
1224 | goto not_found; | |
1225 | } | |
1226 | if (!cv) goto not_found; | |
1227 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) | |
1228 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c')) | |
a6006777 | 1229 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1230 | ? (amtp = (AMT*)mg->mg_ptr)->table | |
1231 | : NULL)) | |
a0d0e21e LW |
1232 | && (cv = cvp[off=method])) { /* Method for right |
1233 | * argument found */ | |
1234 | lr=1; | |
748a9306 | 1235 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
4633a7c4 | 1236 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e LW |
1237 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1238 | && !(flags & AMGf_unary)) { | |
1239 | /* We look for substitution for | |
1240 | * comparison operations and | |
1241 | * concatendation */ | |
1242 | if (method==concat_amg || method==concat_ass_amg | |
1243 | || method==repeat_amg || method==repeat_ass_amg) { | |
1244 | return NULL; /* Delegate operation to string conversion */ | |
1245 | } | |
1246 | off = -1; | |
1247 | switch (method) { | |
1248 | case lt_amg: | |
1249 | case le_amg: | |
1250 | case gt_amg: | |
1251 | case ge_amg: | |
1252 | case eq_amg: | |
1253 | case ne_amg: | |
1254 | postpr = 1; off=ncmp_amg; break; | |
1255 | case slt_amg: | |
1256 | case sle_amg: | |
1257 | case sgt_amg: | |
1258 | case sge_amg: | |
1259 | case seq_amg: | |
1260 | case sne_amg: | |
1261 | postpr = 1; off=scmp_amg; break; | |
1262 | } | |
1263 | if (off != -1) cv = cvp[off]; | |
1264 | if (!cv) { | |
1265 | goto not_found; | |
1266 | } | |
1267 | } else { | |
a6006777 | 1268 | not_found: /* No method found, either report or croak */ |
a0d0e21e LW |
1269 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1270 | notfound = 1; lr = -1; | |
1271 | } else if (cvp && (cv=cvp[nomethod_amg])) { | |
1272 | notfound = 1; lr = 1; | |
1273 | } else { | |
774d564b | 1274 | if (off==-1) off=method; |
1275 | sprintf(buf, | |
1276 | "Operation `%s': no method found,%sargument %s%.256s%s%.256s", | |
a6006777 | 1277 | AMG_names[method + assignshift], |
e7ea3e70 | 1278 | (flags & AMGf_unary ? " " : "\n\tleft "), |
a0d0e21e LW |
1279 | SvAMAGIC(left)? |
1280 | "in overloaded package ": | |
1281 | "has no overloaded magic", | |
1282 | SvAMAGIC(left)? | |
1283 | HvNAME(SvSTASH(SvRV(left))): | |
1284 | "", | |
1285 | SvAMAGIC(right)? | |
e7ea3e70 IZ |
1286 | ",\n\tright argument in overloaded package ": |
1287 | (flags & AMGf_unary | |
1288 | ? "" | |
1289 | : ",\n\tright argument has no overloaded magic"), | |
a0d0e21e LW |
1290 | SvAMAGIC(right)? |
1291 | HvNAME(SvSTASH(SvRV(right))): | |
1292 | ""); | |
1293 | if (amtp && amtp->fallback >= AMGfallYES) { | |
06b43eb7 | 1294 | DEBUG_o( deb(buf) ); |
a0d0e21e | 1295 | } else { |
a6006777 | 1296 | croak(buf); |
a0d0e21e LW |
1297 | } |
1298 | return NULL; | |
1299 | } | |
1300 | } | |
1301 | } | |
1302 | if (!notfound) { | |
774d564b | 1303 | DEBUG_o( deb( |
1304 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %.256s%s\n", | |
a6006777 | 1305 | AMG_names[off], |
748a9306 LW |
1306 | method+assignshift==off? "" : |
1307 | " (initially `", | |
1308 | method+assignshift==off? "" : | |
a6006777 | 1309 | AMG_names[method+assignshift], |
748a9306 LW |
1310 | method+assignshift==off? "" : "')", |
1311 | flags & AMGf_unary? "" : | |
1312 | lr==1 ? " for right argument": " for left argument", | |
1313 | flags & AMGf_unary? " for argument" : "", | |
a0d0e21e LW |
1314 | HvNAME(stash), |
1315 | fl? ",\n\tassignment variant used": "") ); | |
748a9306 LW |
1316 | /* Since we use shallow copy during assignment, we need |
1317 | * to dublicate the contents, probably calling user-supplied | |
1318 | * version of copy operator | |
1319 | */ | |
c07a80fd | 1320 | if ((method + assignshift==off |
748a9306 LW |
1321 | && (assign || method==inc_amg || method==dec_amg)) |
1322 | || inc_dec_ass) RvDEEPCP(left); | |
a0d0e21e LW |
1323 | } |
1324 | { | |
1325 | dSP; | |
1326 | BINOP myop; | |
1327 | SV* res; | |
54310121 | 1328 | bool oldcatch = CATCH_GET; |
a0d0e21e | 1329 | |
54310121 | 1330 | CATCH_SET(TRUE); |
a0d0e21e LW |
1331 | Zero(&myop, 1, BINOP); |
1332 | myop.op_last = (OP *) &myop; | |
1333 | myop.op_next = Nullop; | |
54310121 | 1334 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e LW |
1335 | |
1336 | ENTER; | |
1337 | SAVESPTR(op); | |
1338 | op = (OP *) &myop; | |
dc437b57 | 1339 | if (perldb && curstash != debstash) |
1340 | op->op_private |= OPpENTERSUB_DB; | |
a0d0e21e LW |
1341 | PUTBACK; |
1342 | pp_pushmark(); | |
1343 | ||
1344 | EXTEND(sp, notfound + 5); | |
1345 | PUSHs(lr>0? right: left); | |
1346 | PUSHs(lr>0? left: right); | |
5167a5b1 | 1347 | PUSHs( lr > 0 ? &sv_yes : ( assign ? &sv_undef : &sv_no )); |
a0d0e21e | 1348 | if (notfound) { |
a6006777 | 1349 | PUSHs( sv_2mortal(newSVpv((char *)AMG_names[method + assignshift],0)) ); |
a0d0e21e LW |
1350 | } |
1351 | PUSHs((SV*)cv); | |
1352 | PUTBACK; | |
1353 | ||
1354 | if (op = pp_entersub()) | |
ad8898e0 | 1355 | runops(); |
a0d0e21e LW |
1356 | LEAVE; |
1357 | SPAGAIN; | |
1358 | ||
1359 | res=POPs; | |
1360 | PUTBACK; | |
54310121 | 1361 | CATCH_SET(oldcatch); |
a0d0e21e | 1362 | |
a0d0e21e LW |
1363 | if (postpr) { |
1364 | int ans; | |
1365 | switch (method) { | |
1366 | case le_amg: | |
1367 | case sle_amg: | |
1368 | ans=SvIV(res)<=0; break; | |
1369 | case lt_amg: | |
1370 | case slt_amg: | |
1371 | ans=SvIV(res)<0; break; | |
1372 | case ge_amg: | |
1373 | case sge_amg: | |
1374 | ans=SvIV(res)>=0; break; | |
1375 | case gt_amg: | |
1376 | case sgt_amg: | |
1377 | ans=SvIV(res)>0; break; | |
1378 | case eq_amg: | |
1379 | case seq_amg: | |
1380 | ans=SvIV(res)==0; break; | |
1381 | case ne_amg: | |
1382 | case sne_amg: | |
1383 | ans=SvIV(res)!=0; break; | |
1384 | case inc_amg: | |
1385 | case dec_amg: | |
bbce6d69 | 1386 | SvSetSV(left,res); return left; |
dc437b57 | 1387 | case not_amg: |
44a8e56a | 1388 | ans=!SvOK(res); break; |
a0d0e21e | 1389 | } |
54310121 | 1390 | return boolSV(ans); |
748a9306 LW |
1391 | } else if (method==copy_amg) { |
1392 | if (!SvROK(res)) { | |
a6006777 | 1393 | croak("Copy method did not return a reference"); |
748a9306 LW |
1394 | } |
1395 | return SvREFCNT_inc(SvRV(res)); | |
a0d0e21e LW |
1396 | } else { |
1397 | return res; | |
1398 | } | |
1399 | } | |
1400 | } | |
1401 | #endif /* OVERLOAD */ |