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 | 24 | GV * |
8ac85365 | 25 | gv_AVadd(register GV *gv) |
79072805 | 26 | { |
a0d0e21e LW |
27 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
28 | croak("Bad symbol for array"); | |
79072805 LW |
29 | if (!GvAV(gv)) |
30 | GvAV(gv) = newAV(); | |
31 | return gv; | |
32 | } | |
33 | ||
34 | GV * | |
8ac85365 | 35 | gv_HVadd(register GV *gv) |
79072805 | 36 | { |
a0d0e21e LW |
37 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
38 | croak("Bad symbol for hash"); | |
79072805 | 39 | if (!GvHV(gv)) |
463ee0b2 | 40 | GvHV(gv) = newHV(); |
79072805 LW |
41 | return gv; |
42 | } | |
43 | ||
44 | GV * | |
8ac85365 | 45 | gv_IOadd(register GV *gv) |
a0d0e21e LW |
46 | { |
47 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) | |
48 | croak("Bad symbol for filehandle"); | |
49 | if (!GvIOp(gv)) | |
50 | GvIOp(gv) = newIO(); | |
51 | return gv; | |
52 | } | |
53 | ||
54 | GV * | |
8ac85365 | 55 | gv_fetchfile(char *name) |
79072805 | 56 | { |
e858de61 | 57 | dTHR; |
53d95988 CS |
58 | char smallbuf[256]; |
59 | char *tmpbuf; | |
8ebc5c01 | 60 | STRLEN tmplen; |
79072805 LW |
61 | GV *gv; |
62 | ||
53d95988 CS |
63 | tmplen = strlen(name) + 2; |
64 | if (tmplen < sizeof smallbuf) | |
65 | tmpbuf = smallbuf; | |
66 | else | |
67 | New(603, tmpbuf, tmplen + 1, char); | |
68 | tmpbuf[0] = '_'; | |
69 | tmpbuf[1] = '<'; | |
70 | strcpy(tmpbuf + 2, name); | |
8ebc5c01 | 71 | gv = *(GV**)hv_fetch(defstash, tmpbuf, tmplen, TRUE); |
72 | if (!isGV(gv)) | |
73 | gv_init(gv, defstash, tmpbuf, tmplen, FALSE); | |
53d95988 CS |
74 | if (tmpbuf != smallbuf) |
75 | Safefree(tmpbuf); | |
79072805 | 76 | sv_setpv(GvSV(gv), name); |
8ebc5c01 | 77 | if (*name == '/' && (instr(name, "/lib/") || instr(name, ".pm"))) |
a5f75d66 | 78 | GvMULTI_on(gv); |
84902520 | 79 | if (PERLDB_LINE) |
93a17b20 | 80 | hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L'); |
79072805 LW |
81 | return gv; |
82 | } | |
83 | ||
463ee0b2 | 84 | void |
8ac85365 | 85 | gv_init(GV *gv, HV *stash, char *name, STRLEN len, int multi) |
463ee0b2 | 86 | { |
0f15f207 | 87 | dTHR; |
463ee0b2 LW |
88 | register GP *gp; |
89 | ||
dc437b57 | 90 | sv_upgrade((SV*)gv, SVt_PVGV); |
463ee0b2 LW |
91 | if (SvLEN(gv)) |
92 | Safefree(SvPVX(gv)); | |
44a8e56a | 93 | Newz(602, gp, 1, GP); |
8990e307 | 94 | GvGP(gv) = gp_ref(gp); |
463ee0b2 LW |
95 | GvSV(gv) = NEWSV(72,0); |
96 | GvLINE(gv) = curcop->cop_line; | |
8990e307 | 97 | GvFILEGV(gv) = curcop->cop_filegv; |
463ee0b2 LW |
98 | GvEGV(gv) = gv; |
99 | sv_magic((SV*)gv, (SV*)gv, '*', name, len); | |
85aff577 | 100 | GvSTASH(gv) = (HV*)SvREFCNT_inc(stash); |
a0d0e21e | 101 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 LW |
102 | GvNAMELEN(gv) = len; |
103 | if (multi) | |
a5f75d66 | 104 | GvMULTI_on(gv); |
463ee0b2 LW |
105 | } |
106 | ||
a0d0e21e | 107 | static void |
8ac85365 | 108 | gv_init_sv(GV *gv, I32 sv_type) |
a0d0e21e LW |
109 | { |
110 | switch (sv_type) { | |
111 | case SVt_PVIO: | |
112 | (void)GvIOn(gv); | |
113 | break; | |
114 | case SVt_PVAV: | |
115 | (void)GvAVn(gv); | |
116 | break; | |
117 | case SVt_PVHV: | |
118 | (void)GvHVn(gv); | |
119 | break; | |
120 | } | |
121 | } | |
122 | ||
79072805 | 123 | GV * |
8ac85365 | 124 | gv_fetchmeth(HV *stash, char *name, STRLEN len, I32 level) |
79072805 LW |
125 | { |
126 | AV* av; | |
463ee0b2 | 127 | GV* topgv; |
79072805 | 128 | GV* gv; |
463ee0b2 | 129 | GV** gvp; |
748a9306 | 130 | CV* cv; |
a0d0e21e LW |
131 | |
132 | if (!stash) | |
133 | return 0; | |
44a8e56a | 134 | if ((level > 100) || (level < -100)) |
a0d0e21e | 135 | croak("Recursive inheritance detected"); |
463ee0b2 | 136 | |
463ee0b2 | 137 | DEBUG_o( deb("Looking for method %s in package %s\n",name,HvNAME(stash)) ); |
44a8e56a | 138 | |
139 | gvp = (GV**)hv_fetch(stash, name, len, (level >= 0)); | |
140 | if (!gvp) | |
141 | topgv = Nullgv; | |
142 | else { | |
143 | topgv = *gvp; | |
144 | if (SvTYPE(topgv) != SVt_PVGV) | |
145 | gv_init(topgv, stash, name, len, TRUE); | |
146 | if (cv = GvCV(topgv)) { | |
147 | /* If genuine method or valid cache entry, use it */ | |
148 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) >= sub_generation) | |
7a4c00b4 | 149 | return topgv; |
44a8e56a | 150 | /* Stale cached entry: junk it */ |
151 | SvREFCNT_dec(cv); | |
152 | GvCV(topgv) = cv = Nullcv; | |
153 | GvCVGEN(topgv) = 0; | |
748a9306 | 154 | } |
463ee0b2 | 155 | } |
79072805 | 156 | |
9607fc9c | 157 | gvp = (GV**)hv_fetch(stash, "ISA", 3, FALSE); |
158 | av = (gvp && (gv = *gvp) && gv != (GV*)&sv_undef) ? GvAV(gv) : Nullav; | |
159 | ||
fb73857a | 160 | /* create and re-create @.*::SUPER::ISA on demand */ |
161 | if (!av || !SvMAGIC(av)) { | |
9607fc9c | 162 | char* packname = HvNAME(stash); |
163 | STRLEN packlen = strlen(packname); | |
164 | ||
165 | if (packlen >= 7 && strEQ(packname + packlen - 7, "::SUPER")) { | |
166 | HV* basestash; | |
167 | ||
168 | packlen -= 7; | |
169 | basestash = gv_stashpvn(packname, packlen, TRUE); | |
170 | gvp = (GV**)hv_fetch(basestash, "ISA", 3, FALSE); | |
171 | if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) { | |
e858de61 | 172 | dTHR; /* just for SvREFCNT_dec */ |
9607fc9c | 173 | gvp = (GV**)hv_fetch(stash, "ISA", 3, TRUE); |
174 | if (!gvp || !(gv = *gvp)) | |
175 | croak("Cannot create %s::ISA", HvNAME(stash)); | |
176 | if (SvTYPE(gv) != SVt_PVGV) | |
177 | gv_init(gv, stash, "ISA", 3, TRUE); | |
178 | SvREFCNT_dec(GvAV(gv)); | |
179 | GvAV(gv) = (AV*)SvREFCNT_inc(av); | |
180 | } | |
181 | } | |
182 | } | |
183 | ||
184 | if (av) { | |
79072805 | 185 | SV** svp = AvARRAY(av); |
93965878 NIS |
186 | /* NOTE: No support for tied ISA */ |
187 | I32 items = AvFILLp(av) + 1; | |
79072805 | 188 | while (items--) { |
79072805 | 189 | SV* sv = *svp++; |
a0d0e21e | 190 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 | 191 | if (!basestash) { |
79072805 | 192 | if (dowarn) |
a0d0e21e | 193 | warn("Can't locate package %s for @%s::ISA", |
463ee0b2 | 194 | SvPVX(sv), HvNAME(stash)); |
79072805 LW |
195 | continue; |
196 | } | |
44a8e56a | 197 | gv = gv_fetchmeth(basestash, name, len, |
198 | (level >= 0) ? level + 1 : level - 1); | |
199 | if (gv) | |
200 | goto gotcha; | |
79072805 LW |
201 | } |
202 | } | |
a0d0e21e | 203 | |
9607fc9c | 204 | /* if at top level, try UNIVERSAL */ |
205 | ||
44a8e56a | 206 | if (level == 0 || level == -1) { |
9607fc9c | 207 | HV* lastchance; |
208 | ||
dc437b57 | 209 | if (lastchance = gv_stashpvn("UNIVERSAL", 9, FALSE)) { |
44a8e56a | 210 | if (gv = gv_fetchmeth(lastchance, name, len, |
211 | (level >= 0) ? level + 1 : level - 1)) { | |
212 | gotcha: | |
dc848c6f | 213 | /* |
214 | * Cache method in topgv if: | |
215 | * 1. topgv has no synonyms (else inheritance crosses wires) | |
216 | * 2. method isn't a stub (else AUTOLOAD fails spectacularly) | |
217 | */ | |
218 | if (topgv && | |
219 | GvREFCNT(topgv) == 1 && | |
220 | (cv = GvCV(gv)) && | |
221 | (CvROOT(cv) || CvXSUB(cv))) | |
222 | { | |
44a8e56a | 223 | if (cv = GvCV(topgv)) |
224 | SvREFCNT_dec(cv); | |
225 | GvCV(topgv) = (CV*)SvREFCNT_inc(GvCV(gv)); | |
226 | GvCVGEN(topgv) = sub_generation; | |
227 | } | |
a0d0e21e LW |
228 | return gv; |
229 | } | |
230 | } | |
231 | } | |
232 | ||
79072805 LW |
233 | return 0; |
234 | } | |
235 | ||
236 | GV * | |
8ac85365 | 237 | gv_fetchmethod(HV *stash, char *name) |
463ee0b2 | 238 | { |
dc848c6f | 239 | return gv_fetchmethod_autoload(stash, name, TRUE); |
240 | } | |
241 | ||
242 | GV * | |
8ac85365 | 243 | gv_fetchmethod_autoload(HV *stash, char *name, I32 autoload) |
dc848c6f | 244 | { |
0f15f207 | 245 | dTHR; |
463ee0b2 | 246 | register char *nend; |
a0d0e21e LW |
247 | char *nsplit = 0; |
248 | GV* gv; | |
463ee0b2 LW |
249 | |
250 | for (nend = name; *nend; nend++) { | |
9607fc9c | 251 | if (*nend == '\'') |
a0d0e21e | 252 | nsplit = nend; |
9607fc9c | 253 | else if (*nend == ':' && *(nend + 1) == ':') |
254 | nsplit = ++nend; | |
a0d0e21e LW |
255 | } |
256 | if (nsplit) { | |
a0d0e21e LW |
257 | char *origname = name; |
258 | name = nsplit + 1; | |
a0d0e21e LW |
259 | if (*nsplit == ':') |
260 | --nsplit; | |
9607fc9c | 261 | if ((nsplit - origname) == 5 && strnEQ(origname, "SUPER", 5)) { |
262 | /* ->SUPER::method should really be looked up in original stash */ | |
fc36a67e | 263 | SV *tmpstr = sv_2mortal(newSVpvf("%s::SUPER", |
264 | HvNAME(curcop->cop_stash))); | |
9607fc9c | 265 | stash = gv_stashpvn(SvPVX(tmpstr), SvCUR(tmpstr), TRUE); |
266 | DEBUG_o( deb("Treating %s as %s::%s\n", | |
267 | origname, HvNAME(stash), name) ); | |
4633a7c4 | 268 | } |
9607fc9c | 269 | else |
270 | stash = gv_stashpvn(origname, nsplit - origname, TRUE); | |
4633a7c4 LW |
271 | } |
272 | ||
9607fc9c | 273 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
a0d0e21e | 274 | if (!gv) { |
702887b4 | 275 | if (strEQ(name,"import")) |
dc437b57 | 276 | gv = (GV*)&sv_yes; |
dc848c6f | 277 | else if (autoload) |
54310121 | 278 | gv = gv_autoload4(stash, name, nend - name, TRUE); |
463ee0b2 | 279 | } |
dc848c6f | 280 | else if (autoload) { |
281 | CV* cv = GvCV(gv); | |
09280a33 CS |
282 | if (!CvROOT(cv) && !CvXSUB(cv)) { |
283 | GV* stubgv; | |
284 | GV* autogv; | |
285 | ||
286 | if (CvANON(cv)) | |
287 | stubgv = gv; | |
288 | else { | |
289 | stubgv = CvGV(cv); | |
290 | if (GvCV(stubgv) != cv) /* orphaned import */ | |
291 | stubgv = gv; | |
292 | } | |
293 | autogv = gv_autoload4(GvSTASH(stubgv), | |
294 | GvNAME(stubgv), GvNAMELEN(stubgv), TRUE); | |
dc848c6f | 295 | if (autogv) |
296 | gv = autogv; | |
297 | } | |
298 | } | |
44a8e56a | 299 | |
300 | return gv; | |
301 | } | |
302 | ||
303 | GV* | |
8ac85365 | 304 | gv_autoload4(HV *stash, char *name, STRLEN len, I32 method) |
44a8e56a | 305 | { |
306 | static char autoload[] = "AUTOLOAD"; | |
307 | static STRLEN autolen = 8; | |
308 | GV* gv; | |
309 | CV* cv; | |
310 | HV* varstash; | |
311 | GV* vargv; | |
312 | SV* varsv; | |
313 | ||
314 | if (len == autolen && strnEQ(name, autoload, autolen)) | |
315 | return Nullgv; | |
dc848c6f | 316 | if (!(gv = gv_fetchmeth(stash, autoload, autolen, FALSE))) |
317 | return Nullgv; | |
318 | cv = GvCV(gv); | |
319 | ||
320 | /* | |
321 | * Inheriting AUTOLOAD for non-methods works ... for now. | |
322 | */ | |
323 | if (dowarn && !method && (GvCVGEN(gv) || GvSTASH(gv) != stash)) | |
324 | warn( | |
325 | "Use of inherited AUTOLOAD for non-method %s::%.*s() is deprecated", | |
326 | HvNAME(stash), (int)len, name); | |
44a8e56a | 327 | |
328 | /* | |
329 | * Given &FOO::AUTOLOAD, set $FOO::AUTOLOAD to desired function name. | |
330 | * The subroutine's original name may not be "AUTOLOAD", so we don't | |
331 | * use that, but for lack of anything better we will use the sub's | |
332 | * original package to look up $AUTOLOAD. | |
333 | */ | |
334 | varstash = GvSTASH(CvGV(cv)); | |
335 | vargv = *(GV**)hv_fetch(varstash, autoload, autolen, TRUE); | |
336 | if (!isGV(vargv)) | |
337 | gv_init(vargv, varstash, autoload, autolen, FALSE); | |
338 | varsv = GvSV(vargv); | |
339 | sv_setpv(varsv, HvNAME(stash)); | |
340 | sv_catpvn(varsv, "::", 2); | |
341 | sv_catpvn(varsv, name, len); | |
342 | SvTAINTED_off(varsv); | |
a0d0e21e LW |
343 | return gv; |
344 | } | |
345 | ||
346 | HV* | |
8ac85365 | 347 | gv_stashpv(char *name, I32 create) |
a0d0e21e | 348 | { |
dc437b57 | 349 | return gv_stashpvn(name, strlen(name), create); |
350 | } | |
351 | ||
352 | HV* | |
8ac85365 | 353 | gv_stashpvn(char *name, U32 namelen, I32 create) |
dc437b57 | 354 | { |
46fc3d4c | 355 | char smallbuf[256]; |
356 | char *tmpbuf; | |
a0d0e21e LW |
357 | HV *stash; |
358 | GV *tmpgv; | |
dc437b57 | 359 | |
46fc3d4c | 360 | if (namelen + 3 < sizeof smallbuf) |
361 | tmpbuf = smallbuf; | |
362 | else | |
363 | New(606, tmpbuf, namelen + 3, char); | |
dc437b57 | 364 | Copy(name,tmpbuf,namelen,char); |
365 | tmpbuf[namelen++] = ':'; | |
366 | tmpbuf[namelen++] = ':'; | |
367 | tmpbuf[namelen] = '\0'; | |
46fc3d4c | 368 | tmpgv = gv_fetchpv(tmpbuf, create, SVt_PVHV); |
369 | if (tmpbuf != smallbuf) | |
370 | Safefree(tmpbuf); | |
a0d0e21e LW |
371 | if (!tmpgv) |
372 | return 0; | |
373 | if (!GvHV(tmpgv)) | |
374 | GvHV(tmpgv) = newHV(); | |
375 | stash = GvHV(tmpgv); | |
376 | if (!HvNAME(stash)) | |
377 | HvNAME(stash) = savepv(name); | |
378 | return stash; | |
463ee0b2 LW |
379 | } |
380 | ||
a0d0e21e | 381 | HV* |
8ac85365 | 382 | gv_stashsv(SV *sv, I32 create) |
a0d0e21e | 383 | { |
dc437b57 | 384 | register char *ptr; |
385 | STRLEN len; | |
386 | ptr = SvPV(sv,len); | |
387 | return gv_stashpvn(ptr, len, create); | |
a0d0e21e LW |
388 | } |
389 | ||
390 | ||
463ee0b2 | 391 | GV * |
8ac85365 | 392 | gv_fetchpv(char *nambeg, I32 add, I32 sv_type) |
79072805 | 393 | { |
11343788 | 394 | dTHR; |
463ee0b2 LW |
395 | register char *name = nambeg; |
396 | register GV *gv = 0; | |
79072805 | 397 | GV**gvp; |
79072805 LW |
398 | I32 len; |
399 | register char *namend; | |
463ee0b2 | 400 | HV *stash = 0; |
9607fc9c | 401 | U32 add_gvflags = 0; |
79072805 | 402 | |
c07a80fd | 403 | if (*name == '*' && isALPHA(name[1])) /* accidental stringify on a GV? */ |
404 | name++; | |
405 | ||
79072805 | 406 | for (namend = name; *namend; namend++) { |
463ee0b2 LW |
407 | if ((*namend == '\'' && namend[1]) || |
408 | (*namend == ':' && namend[1] == ':')) | |
409 | { | |
463ee0b2 LW |
410 | if (!stash) |
411 | stash = defstash; | |
dc437b57 | 412 | if (!stash || !SvREFCNT(stash)) /* symbol table under destruction */ |
a0d0e21e | 413 | return Nullgv; |
463ee0b2 | 414 | |
85e6fe83 LW |
415 | len = namend - name; |
416 | if (len > 0) { | |
62b57502 MB |
417 | char *tmpbuf; |
418 | char autobuf[64]; | |
419 | ||
420 | if (len < sizeof(autobuf) - 2) | |
421 | tmpbuf = autobuf; | |
422 | else | |
423 | New(601, tmpbuf, len+3, char); | |
a0d0e21e LW |
424 | Copy(name, tmpbuf, len, char); |
425 | tmpbuf[len++] = ':'; | |
426 | tmpbuf[len++] = ':'; | |
427 | tmpbuf[len] = '\0'; | |
463ee0b2 | 428 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
6fa846a0 GS |
429 | gv = gvp ? *gvp : Nullgv; |
430 | if (gv && gv != (GV*)&sv_undef) { | |
431 | if (SvTYPE(gv) != SVt_PVGV) | |
432 | gv_init(gv, stash, tmpbuf, len, (add & 2)); | |
433 | else | |
434 | GvMULTI_on(gv); | |
435 | } | |
62b57502 MB |
436 | if (tmpbuf != autobuf) |
437 | Safefree(tmpbuf); | |
6fa846a0 | 438 | if (!gv || gv == (GV*)&sv_undef) |
a0d0e21e | 439 | return Nullgv; |
85e6fe83 | 440 | |
463ee0b2 LW |
441 | if (!(stash = GvHV(gv))) |
442 | stash = GvHV(gv) = newHV(); | |
85e6fe83 | 443 | |
463ee0b2 | 444 | if (!HvNAME(stash)) |
a0d0e21e | 445 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 LW |
446 | } |
447 | ||
448 | if (*namend == ':') | |
449 | namend++; | |
450 | namend++; | |
451 | name = namend; | |
452 | if (!*name) | |
dc437b57 | 453 | return gv ? gv : (GV*)*hv_fetch(defstash, "main::", 6, TRUE); |
79072805 | 454 | } |
79072805 | 455 | } |
a0d0e21e LW |
456 | len = namend - name; |
457 | if (!len) | |
458 | len = 1; | |
463ee0b2 LW |
459 | |
460 | /* No stash in name, so see how we can default */ | |
461 | ||
462 | if (!stash) { | |
463 | if (isIDFIRST(*name)) { | |
9607fc9c | 464 | bool global = FALSE; |
465 | ||
463ee0b2 LW |
466 | if (isUPPER(*name)) { |
467 | if (*name > 'I') { | |
468 | if (*name == 'S' && ( | |
469 | strEQ(name, "SIG") || | |
470 | strEQ(name, "STDIN") || | |
471 | strEQ(name, "STDOUT") || | |
472 | strEQ(name, "STDERR") )) | |
473 | global = TRUE; | |
474 | } | |
475 | else if (*name > 'E') { | |
476 | if (*name == 'I' && strEQ(name, "INC")) | |
477 | global = TRUE; | |
478 | } | |
479 | else if (*name > 'A') { | |
480 | if (*name == 'E' && strEQ(name, "ENV")) | |
481 | global = TRUE; | |
482 | } | |
483 | else if (*name == 'A' && ( | |
484 | strEQ(name, "ARGV") || | |
485 | strEQ(name, "ARGVOUT") )) | |
486 | global = TRUE; | |
487 | } | |
488 | else if (*name == '_' && !name[1]) | |
489 | global = TRUE; | |
9607fc9c | 490 | |
463ee0b2 LW |
491 | if (global) |
492 | stash = defstash; | |
85e6fe83 | 493 | else if ((COP*)curcop == &compiling) { |
a0d0e21e | 494 | stash = curstash; |
748a9306 LW |
495 | if (add && (hints & HINT_STRICT_VARS) && |
496 | sv_type != SVt_PVCV && | |
497 | sv_type != SVt_PVGV && | |
4633a7c4 | 498 | sv_type != SVt_PVFM && |
c07a80fd | 499 | sv_type != SVt_PVIO && |
377b8fbc | 500 | !(len == 1 && sv_type == SVt_PV && strchr("ab",*name)) ) |
748a9306 | 501 | { |
4633a7c4 LW |
502 | gvp = (GV**)hv_fetch(stash,name,len,0); |
503 | if (!gvp || | |
a5f75d66 AD |
504 | *gvp == (GV*)&sv_undef || |
505 | SvTYPE(*gvp) != SVt_PVGV) | |
506 | { | |
4633a7c4 | 507 | stash = 0; |
a5f75d66 AD |
508 | } |
509 | else if (sv_type == SVt_PV && !GvIMPORTED_SV(*gvp) || | |
510 | sv_type == SVt_PVAV && !GvIMPORTED_AV(*gvp) || | |
511 | sv_type == SVt_PVHV && !GvIMPORTED_HV(*gvp) ) | |
4633a7c4 | 512 | { |
a5f75d66 | 513 | warn("Variable \"%c%s\" is not imported", |
4633a7c4 LW |
514 | sv_type == SVt_PVAV ? '@' : |
515 | sv_type == SVt_PVHV ? '%' : '$', | |
516 | name); | |
8ebc5c01 | 517 | if (GvCVu(*gvp)) |
4633a7c4 | 518 | warn("(Did you mean &%s instead?)\n", name); |
a0d0e21e | 519 | stash = 0; |
4633a7c4 | 520 | } |
a0d0e21e | 521 | } |
85e6fe83 | 522 | } |
463ee0b2 LW |
523 | else |
524 | stash = curcop->cop_stash; | |
525 | } | |
526 | else | |
527 | stash = defstash; | |
528 | } | |
529 | ||
530 | /* By this point we should have a stash and a name */ | |
531 | ||
a0d0e21e | 532 | if (!stash) { |
93233ece CS |
533 | if (!add) |
534 | return Nullgv; | |
535 | if (add & ~2) { | |
2c4aebbd T |
536 | char sv_type_char = ((sv_type == SVt_PV) ? '$' |
537 | : (sv_type == SVt_PVAV) ? '@' | |
538 | : (sv_type == SVt_PVHV) ? '%' | |
539 | : 0); | |
540 | if (sv_type_char) | |
541 | warn("Global symbol \"%c%s\" requires explicit package name", | |
542 | sv_type_char, name); | |
543 | else | |
93233ece CS |
544 | warn("Global symbol \"%s\" requires explicit package name", |
545 | name); | |
a0d0e21e | 546 | } |
93233ece CS |
547 | ++error_count; |
548 | stash = curstash ? curstash : defstash; /* avoid core dumps */ | |
549 | add_gvflags = ((sv_type == SVt_PV) ? GVf_IMPORTED_SV | |
550 | : (sv_type == SVt_PVAV) ? GVf_IMPORTED_AV | |
551 | : (sv_type == SVt_PVHV) ? GVf_IMPORTED_HV | |
552 | : 0); | |
a0d0e21e LW |
553 | } |
554 | ||
555 | if (!SvREFCNT(stash)) /* symbol table under destruction */ | |
556 | return Nullgv; | |
557 | ||
79072805 LW |
558 | gvp = (GV**)hv_fetch(stash,name,len,add); |
559 | if (!gvp || *gvp == (GV*)&sv_undef) | |
560 | return Nullgv; | |
561 | gv = *gvp; | |
562 | if (SvTYPE(gv) == SVt_PVGV) { | |
a0d0e21e | 563 | if (add) { |
a5f75d66 | 564 | GvMULTI_on(gv); |
a0d0e21e LW |
565 | gv_init_sv(gv, sv_type); |
566 | } | |
79072805 LW |
567 | return gv; |
568 | } | |
93a17b20 LW |
569 | |
570 | /* Adding a new symbol */ | |
571 | ||
a0d0e21e LW |
572 | if (add & 4) |
573 | warn("Had to create %s unexpectedly", nambeg); | |
463ee0b2 | 574 | gv_init(gv, stash, name, len, add & 2); |
a0d0e21e | 575 | gv_init_sv(gv, sv_type); |
9607fc9c | 576 | GvFLAGS(gv) |= add_gvflags; |
93a17b20 LW |
577 | |
578 | /* set up magic where warranted */ | |
579 | switch (*name) { | |
a0d0e21e LW |
580 | case 'A': |
581 | if (strEQ(name, "ARGV")) { | |
582 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; | |
583 | } | |
584 | break; | |
585 | ||
ed6116ce LW |
586 | case 'a': |
587 | case 'b': | |
588 | if (len == 1) | |
a5f75d66 | 589 | GvMULTI_on(gv); |
ed6116ce | 590 | break; |
a0d0e21e LW |
591 | case 'E': |
592 | if (strnEQ(name, "EXPORT", 6)) | |
a5f75d66 | 593 | GvMULTI_on(gv); |
a0d0e21e | 594 | break; |
463ee0b2 LW |
595 | case 'I': |
596 | if (strEQ(name, "ISA")) { | |
597 | AV* av = GvAVn(gv); | |
a5f75d66 | 598 | GvMULTI_on(gv); |
a0d0e21e | 599 | sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0); |
93965878 NIS |
600 | /* NOTE: No support for tied ISA */ |
601 | if (add & 2 && strEQ(nambeg,"AnyDBM_File::ISA") && AvFILLp(av) == -1) | |
85e6fe83 | 602 | { |
a0d0e21e LW |
603 | char *pname; |
604 | av_push(av, newSVpv(pname = "NDBM_File",0)); | |
dc437b57 | 605 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e | 606 | av_push(av, newSVpv(pname = "DB_File",0)); |
dc437b57 | 607 | gv_stashpvn(pname, 7, TRUE); |
a0d0e21e | 608 | av_push(av, newSVpv(pname = "GDBM_File",0)); |
dc437b57 | 609 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e | 610 | av_push(av, newSVpv(pname = "SDBM_File",0)); |
dc437b57 | 611 | gv_stashpvn(pname, 9, TRUE); |
a0d0e21e | 612 | av_push(av, newSVpv(pname = "ODBM_File",0)); |
dc437b57 | 613 | gv_stashpvn(pname, 9, TRUE); |
85e6fe83 | 614 | } |
463ee0b2 LW |
615 | } |
616 | break; | |
a0d0e21e LW |
617 | #ifdef OVERLOAD |
618 | case 'O': | |
619 | if (strEQ(name, "OVERLOAD")) { | |
620 | HV* hv = GvHVn(gv); | |
a5f75d66 | 621 | GvMULTI_on(gv); |
ea0efc06 | 622 | hv_magic(hv, gv, 'A'); |
a0d0e21e LW |
623 | } |
624 | break; | |
625 | #endif /* OVERLOAD */ | |
93a17b20 LW |
626 | case 'S': |
627 | if (strEQ(name, "SIG")) { | |
628 | HV *hv; | |
dc437b57 | 629 | I32 i; |
93a17b20 | 630 | siggv = gv; |
a5f75d66 | 631 | GvMULTI_on(siggv); |
93a17b20 LW |
632 | hv = GvHVn(siggv); |
633 | hv_magic(hv, siggv, 'S'); | |
dc437b57 | 634 | for(i=1;sig_name[i];i++) { |
635 | SV ** init; | |
636 | init=hv_fetch(hv,sig_name[i],strlen(sig_name[i]),1); | |
637 | if(init) | |
638 | sv_setsv(*init,&sv_undef); | |
639 | psig_ptr[i] = 0; | |
640 | psig_name[i] = 0; | |
641 | } | |
93a17b20 LW |
642 | /* initialize signal stack */ |
643 | signalstack = newAV(); | |
93a17b20 | 644 | AvREAL_off(signalstack); |
a0d0e21e LW |
645 | av_extend(signalstack, 30); |
646 | av_fill(signalstack, 0); | |
93a17b20 LW |
647 | } |
648 | break; | |
649 | ||
650 | case '&': | |
463ee0b2 LW |
651 | if (len > 1) |
652 | break; | |
93a17b20 LW |
653 | ampergv = gv; |
654 | sawampersand = TRUE; | |
a0d0e21e | 655 | goto ro_magicalize; |
93a17b20 LW |
656 | |
657 | case '`': | |
463ee0b2 LW |
658 | if (len > 1) |
659 | break; | |
93a17b20 LW |
660 | leftgv = gv; |
661 | sawampersand = TRUE; | |
a0d0e21e | 662 | goto ro_magicalize; |
93a17b20 LW |
663 | |
664 | case '\'': | |
463ee0b2 LW |
665 | if (len > 1) |
666 | break; | |
93a17b20 LW |
667 | rightgv = gv; |
668 | sawampersand = TRUE; | |
a0d0e21e | 669 | goto ro_magicalize; |
93a17b20 LW |
670 | |
671 | case ':': | |
463ee0b2 LW |
672 | if (len > 1) |
673 | break; | |
93a17b20 LW |
674 | sv_setpv(GvSV(gv),chopset); |
675 | goto magicalize; | |
676 | ||
ff0cee69 | 677 | case '?': |
678 | if (len > 1) | |
679 | break; | |
680 | #ifdef COMPLEX_STATUS | |
681 | sv_upgrade(GvSV(gv), SVt_PVLV); | |
682 | #endif | |
683 | goto magicalize; | |
684 | ||
93a17b20 | 685 | case '#': |
a0d0e21e LW |
686 | case '*': |
687 | if (dowarn && len == 1 && sv_type == SVt_PV) | |
688 | warn("Use of $%s is deprecated", name); | |
689 | /* FALL THROUGH */ | |
690 | case '[': | |
691 | case '!': | |
93a17b20 LW |
692 | case '^': |
693 | case '~': | |
694 | case '=': | |
695 | case '-': | |
696 | case '%': | |
697 | case '.': | |
93a17b20 LW |
698 | case '(': |
699 | case ')': | |
700 | case '<': | |
701 | case '>': | |
702 | case ',': | |
703 | case '\\': | |
704 | case '/': | |
93a17b20 | 705 | case '|': |
748a9306 | 706 | case '\001': |
93a17b20 | 707 | case '\004': |
ad8898e0 | 708 | case '\005': |
748a9306 | 709 | case '\006': |
a0d0e21e | 710 | case '\010': |
ad8898e0 | 711 | case '\017': |
93a17b20 LW |
712 | case '\t': |
713 | case '\020': | |
714 | case '\024': | |
715 | case '\027': | |
463ee0b2 LW |
716 | if (len > 1) |
717 | break; | |
718 | goto magicalize; | |
719 | ||
a0d0e21e | 720 | case '+': |
463ee0b2 LW |
721 | case '1': |
722 | case '2': | |
723 | case '3': | |
724 | case '4': | |
725 | case '5': | |
726 | case '6': | |
727 | case '7': | |
728 | case '8': | |
729 | case '9': | |
fb73857a | 730 | case '\023': |
a0d0e21e LW |
731 | ro_magicalize: |
732 | SvREADONLY_on(GvSV(gv)); | |
93a17b20 | 733 | magicalize: |
463ee0b2 | 734 | sv_magic(GvSV(gv), (SV*)gv, 0, name, len); |
93a17b20 LW |
735 | break; |
736 | ||
737 | case '\014': | |
463ee0b2 LW |
738 | if (len > 1) |
739 | break; | |
93a17b20 LW |
740 | sv_setpv(GvSV(gv),"\f"); |
741 | formfeed = GvSV(gv); | |
742 | break; | |
743 | case ';': | |
463ee0b2 LW |
744 | if (len > 1) |
745 | break; | |
93a17b20 LW |
746 | sv_setpv(GvSV(gv),"\034"); |
747 | break; | |
463ee0b2 LW |
748 | case ']': |
749 | if (len == 1) { | |
f86702cc | 750 | SV *sv = GvSV(gv); |
93a17b20 | 751 | sv_upgrade(sv, SVt_PVNV); |
a0d0e21e | 752 | sv_setpv(sv, patchlevel); |
f86702cc | 753 | (void)sv_2nv(sv); |
754 | SvREADONLY_on(sv); | |
93a17b20 LW |
755 | } |
756 | break; | |
79072805 | 757 | } |
93a17b20 | 758 | return gv; |
79072805 LW |
759 | } |
760 | ||
761 | void | |
8ac85365 | 762 | gv_fullname3(SV *sv, GV *gv, char *prefix) |
79072805 LW |
763 | { |
764 | HV *hv = GvSTASH(gv); | |
f967eb5f | 765 | if (!hv) { |
766 | SvOK_off(sv); | |
79072805 | 767 | return; |
f967eb5f | 768 | } |
769 | sv_setpv(sv, prefix ? prefix : ""); | |
79072805 | 770 | sv_catpv(sv,HvNAME(hv)); |
463ee0b2 | 771 | sv_catpvn(sv,"::", 2); |
79072805 LW |
772 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
773 | } | |
774 | ||
775 | void | |
8ac85365 | 776 | gv_efullname3(SV *sv, GV *gv, char *prefix) |
79072805 | 777 | { |
f967eb5f | 778 | GV *egv = GvEGV(gv); |
748a9306 LW |
779 | if (!egv) |
780 | egv = gv; | |
f6aff53a | 781 | gv_fullname3(sv, egv, prefix); |
782 | } | |
783 | ||
784 | /* XXX compatibility with versions <= 5.003. */ | |
785 | void | |
8ac85365 | 786 | gv_fullname(SV *sv, GV *gv) |
f6aff53a | 787 | { |
788 | gv_fullname3(sv, gv, sv == (SV*)gv ? "*" : ""); | |
789 | } | |
790 | ||
791 | /* XXX compatibility with versions <= 5.003. */ | |
792 | void | |
8ac85365 | 793 | gv_efullname(SV *sv, GV *gv) |
f6aff53a | 794 | { |
795 | gv_efullname3(sv, gv, sv == (SV*)gv ? "*" : ""); | |
79072805 LW |
796 | } |
797 | ||
798 | IO * | |
8ac85365 | 799 | newIO(void) |
79072805 | 800 | { |
11343788 | 801 | dTHR; |
79072805 | 802 | IO *io; |
8990e307 LW |
803 | GV *iogv; |
804 | ||
805 | io = (IO*)NEWSV(0,0); | |
a0d0e21e | 806 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 LW |
807 | SvREFCNT(io) = 1; |
808 | SvOBJECT_on(io); | |
c9de509e GA |
809 | iogv = gv_fetchpv("FileHandle::", FALSE, SVt_PVHV); |
810 | if (!iogv) | |
811 | iogv = gv_fetchpv("IO::Handle::", TRUE, SVt_PVHV); | |
8990e307 | 812 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 LW |
813 | return io; |
814 | } | |
815 | ||
816 | void | |
8ac85365 | 817 | gv_check(HV *stash) |
79072805 | 818 | { |
11343788 | 819 | dTHR; |
79072805 LW |
820 | register HE *entry; |
821 | register I32 i; | |
822 | register GV *gv; | |
463ee0b2 | 823 | HV *hv; |
a0d0e21e | 824 | GV *filegv; |
463ee0b2 | 825 | |
8990e307 LW |
826 | if (!HvARRAY(stash)) |
827 | return; | |
a0d0e21e | 828 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
dc437b57 | 829 | for (entry = HvARRAY(stash)[i]; entry; entry = HeNEXT(entry)) { |
830 | if (HeKEY(entry)[HeKLEN(entry)-1] == ':' && | |
831 | (gv = (GV*)HeVAL(entry)) && (hv = GvHV(gv)) && HvNAME(hv)) | |
a0d0e21e LW |
832 | { |
833 | if (hv != defstash) | |
834 | gv_check(hv); /* nested package */ | |
835 | } | |
dc437b57 | 836 | else if (isALPHA(*HeKEY(entry))) { |
837 | gv = (GV*)HeVAL(entry); | |
a5f75d66 | 838 | if (GvMULTI(gv)) |
463ee0b2 LW |
839 | continue; |
840 | curcop->cop_line = GvLINE(gv); | |
a0d0e21e LW |
841 | filegv = GvFILEGV(gv); |
842 | curcop->cop_filegv = filegv; | |
a5f75d66 | 843 | if (filegv && GvMULTI(filegv)) /* Filename began with slash */ |
8990e307 | 844 | continue; |
dc437b57 | 845 | warn("Name \"%s::%s\" used only once: possible typo", |
a0d0e21e | 846 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 | 847 | } |
79072805 LW |
848 | } |
849 | } | |
850 | } | |
851 | ||
852 | GV * | |
8ac85365 | 853 | newGVgen(char *pack) |
79072805 | 854 | { |
46fc3d4c | 855 | return gv_fetchpv(form("%s::_GEN_%ld", pack, (long)gensym++), |
856 | TRUE, SVt_PVGV); | |
79072805 LW |
857 | } |
858 | ||
859 | /* hopefully this is only called on local symbol table entries */ | |
860 | ||
861 | GP* | |
8ac85365 | 862 | gp_ref(GP *gp) |
79072805 LW |
863 | { |
864 | gp->gp_refcnt++; | |
44a8e56a | 865 | if (gp->gp_cv) { |
866 | if (gp->gp_cvgen) { | |
867 | /* multi-named GPs cannot be used for method cache */ | |
868 | SvREFCNT_dec(gp->gp_cv); | |
869 | gp->gp_cv = Nullcv; | |
870 | gp->gp_cvgen = 0; | |
871 | } | |
872 | else { | |
873 | /* Adding a new name to a subroutine invalidates method cache */ | |
874 | sub_generation++; | |
875 | } | |
876 | } | |
79072805 | 877 | return gp; |
79072805 LW |
878 | } |
879 | ||
880 | void | |
8ac85365 | 881 | gp_free(GV *gv) |
79072805 | 882 | { |
79072805 | 883 | GP* gp; |
377b8fbc | 884 | CV* cv; |
79072805 LW |
885 | |
886 | if (!gv || !(gp = GvGP(gv))) | |
887 | return; | |
888 | if (gp->gp_refcnt == 0) { | |
889 | warn("Attempt to free unreferenced glob pointers"); | |
890 | return; | |
891 | } | |
44a8e56a | 892 | if (gp->gp_cv) { |
893 | /* Deleting the name of a subroutine invalidates method cache */ | |
894 | sub_generation++; | |
895 | } | |
748a9306 LW |
896 | if (--gp->gp_refcnt > 0) { |
897 | if (gp->gp_egv == gv) | |
898 | gp->gp_egv = 0; | |
79072805 | 899 | return; |
748a9306 | 900 | } |
79072805 | 901 | |
8990e307 LW |
902 | SvREFCNT_dec(gp->gp_sv); |
903 | SvREFCNT_dec(gp->gp_av); | |
904 | SvREFCNT_dec(gp->gp_hv); | |
377b8fbc | 905 | SvREFCNT_dec(gp->gp_io); |
a6006777 | 906 | SvREFCNT_dec(gp->gp_cv); |
748a9306 LW |
907 | SvREFCNT_dec(gp->gp_form); |
908 | ||
79072805 LW |
909 | Safefree(gp); |
910 | GvGP(gv) = 0; | |
911 | } | |
912 | ||
913 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) | |
914 | #define MICROPORT | |
915 | #endif | |
916 | ||
917 | #ifdef MICROPORT /* Microport 2.4 hack */ | |
918 | AV *GvAVn(gv) | |
919 | register GV *gv; | |
920 | { | |
921 | if (GvGP(gv)->gp_av) | |
922 | return GvGP(gv)->gp_av; | |
923 | else | |
924 | return GvGP(gv_AVadd(gv))->gp_av; | |
925 | } | |
926 | ||
927 | HV *GvHVn(gv) | |
928 | register GV *gv; | |
929 | { | |
930 | if (GvGP(gv)->gp_hv) | |
931 | return GvGP(gv)->gp_hv; | |
932 | else | |
933 | return GvGP(gv_HVadd(gv))->gp_hv; | |
934 | } | |
935 | #endif /* Microport 2.4 hack */ | |
a0d0e21e LW |
936 | |
937 | #ifdef OVERLOAD | |
938 | /* Updates and caches the CV's */ | |
939 | ||
940 | bool | |
8ac85365 | 941 | Gv_AMupdate(HV *stash) |
a0d0e21e | 942 | { |
11343788 | 943 | dTHR; |
a0d0e21e LW |
944 | GV** gvp; |
945 | HV* hv; | |
946 | GV* gv; | |
947 | CV* cv; | |
948 | MAGIC* mg=mg_find((SV*)stash,'c'); | |
8ac85365 | 949 | AMT *amtp = (mg) ? (AMT*)mg->mg_ptr: (AMT *) NULL; |
a6006777 | 950 | AMT amt; |
a0d0e21e | 951 | |
e7ea3e70 IZ |
952 | if (mg && amtp->was_ok_am == amagic_generation |
953 | && amtp->was_ok_sub == sub_generation) | |
a6006777 | 954 | return AMT_AMAGIC(amtp); |
955 | if (amtp && AMT_AMAGIC(amtp)) { /* Have table. */ | |
748a9306 | 956 | int i; |
a6006777 | 957 | for (i=1; i<NofAMmeth; i++) { |
748a9306 LW |
958 | if (amtp->table[i]) { |
959 | SvREFCNT_dec(amtp->table[i]); | |
960 | } | |
961 | } | |
962 | } | |
a0d0e21e LW |
963 | sv_unmagic((SV*)stash, 'c'); |
964 | ||
965 | DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) ); | |
966 | ||
a6006777 | 967 | amt.was_ok_am = amagic_generation; |
968 | amt.was_ok_sub = sub_generation; | |
969 | amt.fallback = AMGfallNO; | |
970 | amt.flags = 0; | |
971 | ||
972 | #ifdef OVERLOAD_VIA_HASH | |
973 | gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); /* A shortcut */ | |
a0d0e21e LW |
974 | if (gvp && ((gv = *gvp) != (GV*)&sv_undef && (hv = GvHV(gv)))) { |
975 | int filled=0; | |
976 | int i; | |
977 | char *cp; | |
a0d0e21e LW |
978 | SV* sv; |
979 | SV** svp; | |
a0d0e21e LW |
980 | |
981 | /* Work with "fallback" key, which we assume to be first in AMG_names */ | |
982 | ||
a6006777 | 983 | if (( cp = (char *)AMG_names[0] ) && |
984 | (svp = (SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) { | |
a0d0e21e LW |
985 | if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
986 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; | |
987 | } | |
a6006777 | 988 | for (i = 1; i < NofAMmeth; i++) { |
989 | cv = 0; | |
990 | cp = (char *)AMG_names[i]; | |
991 | ||
992 | svp = (SV**)hv_fetch(hv, cp, strlen(cp), FALSE); | |
dc437b57 | 993 | if (svp && ((sv = *svp) != &sv_undef)) { |
a0d0e21e LW |
994 | switch (SvTYPE(sv)) { |
995 | default: | |
996 | if (!SvROK(sv)) { | |
997 | if (!SvOK(sv)) break; | |
748a9306 | 998 | gv = gv_fetchmethod(stash, SvPV(sv, na)); |
a0d0e21e LW |
999 | if (gv) cv = GvCV(gv); |
1000 | break; | |
1001 | } | |
1002 | cv = (CV*)SvRV(sv); | |
1003 | if (SvTYPE(cv) == SVt_PVCV) | |
1004 | break; | |
1005 | /* FALL THROUGH */ | |
1006 | case SVt_PVHV: | |
1007 | case SVt_PVAV: | |
a6006777 | 1008 | croak("Not a subroutine reference in overload table"); |
a0d0e21e LW |
1009 | return FALSE; |
1010 | case SVt_PVCV: | |
8ebc5c01 | 1011 | cv = (CV*)sv; |
1012 | break; | |
a0d0e21e | 1013 | case SVt_PVGV: |
8ebc5c01 | 1014 | if (!(cv = GvCVu((GV*)sv))) |
1015 | cv = sv_2cv(sv, &stash, &gv, TRUE); | |
1016 | break; | |
a0d0e21e LW |
1017 | } |
1018 | if (cv) filled=1; | |
1019 | else { | |
a6006777 | 1020 | croak("Method for operation %s not found in package %.256s during blessing\n", |
a0d0e21e LW |
1021 | cp,HvNAME(stash)); |
1022 | return FALSE; | |
1023 | } | |
1024 | } | |
a6006777 | 1025 | #else |
1026 | { | |
1027 | int filled = 0; | |
1028 | int i; | |
9607fc9c | 1029 | const char *cp; |
a6006777 | 1030 | SV* sv = NULL; |
1031 | SV** svp; | |
1032 | ||
1033 | /* Work with "fallback" key, which we assume to be first in AMG_names */ | |
1034 | ||
9607fc9c | 1035 | if ( cp = AMG_names[0] ) { |
a6006777 | 1036 | /* Try to find via inheritance. */ |
774d564b | 1037 | gv = gv_fetchmeth(stash, "()", 2, -1); /* A cookie: "()". */ |
a6006777 | 1038 | if (gv) sv = GvSV(gv); |
1039 | ||
774d564b | 1040 | if (!gv) goto no_table; |
a6006777 | 1041 | else if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
1042 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; | |
1043 | } | |
1044 | ||
1045 | for (i = 1; i < NofAMmeth; i++) { | |
46fc3d4c | 1046 | SV *cookie = sv_2mortal(newSVpvf("(%s", cp = AMG_names[i])); |
44a8e56a | 1047 | DEBUG_o( deb("Checking overloading of `%s' in package `%.256s'\n", |
1048 | cp, HvNAME(stash)) ); | |
46fc3d4c | 1049 | /* don't fill the cache while looking up! */ |
1050 | gv = gv_fetchmeth(stash, SvPVX(cookie), SvCUR(cookie), -1); | |
1051 | cv = 0; | |
44a8e56a | 1052 | if(gv && (cv = GvCV(gv))) { |
44a8e56a | 1053 | if (GvNAMELEN(CvGV(cv)) == 3 && strEQ(GvNAME(CvGV(cv)), "nil") |
1054 | && strEQ(HvNAME(GvSTASH(CvGV(cv))), "overload")) { | |
1055 | /* GvSV contains the name of the method. */ | |
1056 | GV *ngv; | |
1057 | ||
1058 | DEBUG_o( deb("Resolving method `%.256s' for overloaded `%s' in package `%.256s'\n", | |
1059 | SvPV(GvSV(gv), na), cp, HvNAME(stash)) ); | |
dc848c6f | 1060 | if (!SvPOK(GvSV(gv)) |
1061 | || !(ngv = gv_fetchmethod_autoload(stash, SvPVX(GvSV(gv)), | |
1062 | FALSE))) | |
1063 | { | |
44a8e56a | 1064 | /* Can be an import stub (created by `can'). */ |
1065 | if (GvCVGEN(gv)) { | |
1066 | croak("Stub found while resolving method `%.256s' overloading `%s' in package `%.256s'", | |
1067 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), | |
1068 | cp, HvNAME(stash)); | |
1069 | } else | |
1070 | croak("Cannot resolve method `%.256s' overloading `%s' in package `%.256s'", | |
1071 | (SvPOK(GvSV(gv)) ? SvPVX(GvSV(gv)) : "???" ), | |
1072 | cp, HvNAME(stash)); | |
1073 | } | |
dc848c6f | 1074 | cv = GvCV(gv = ngv); |
44a8e56a | 1075 | } |
1076 | DEBUG_o( deb("Overloading `%s' in package `%.256s' via `%.256s::%.256s' \n", | |
1077 | cp, HvNAME(stash), HvNAME(GvSTASH(CvGV(cv))), | |
1078 | GvNAME(CvGV(cv))) ); | |
1079 | filled = 1; | |
1080 | } | |
a6006777 | 1081 | #endif |
1082 | amt.table[i]=(CV*)SvREFCNT_inc(cv); | |
a0d0e21e | 1083 | } |
a0d0e21e | 1084 | if (filled) { |
a6006777 | 1085 | AMT_AMAGIC_on(&amt); |
1086 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMT)); | |
a0d0e21e LW |
1087 | return TRUE; |
1088 | } | |
1089 | } | |
a6006777 | 1090 | /* Here we have no table: */ |
774d564b | 1091 | no_table: |
a6006777 | 1092 | AMT_AMAGIC_off(&amt); |
1093 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(AMTS)); | |
a0d0e21e LW |
1094 | return FALSE; |
1095 | } | |
1096 | ||
1097 | /* During call to this subroutine stack can be reallocated. It is | |
1098 | * advised to call SPAGAIN macro in your code after call */ | |
1099 | ||
1100 | SV* | |
8ac85365 | 1101 | amagic_call(SV *left, SV *right, int method, int flags) |
a0d0e21e | 1102 | { |
11343788 | 1103 | dTHR; |
a0d0e21e LW |
1104 | MAGIC *mg; |
1105 | CV *cv; | |
1106 | CV **cvp=NULL, **ocvp=NULL; | |
1107 | AMT *amtp, *oamtp; | |
1108 | int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; | |
748a9306 | 1109 | int postpr=0, inc_dec_ass=0, assignshift=assign?1:0; |
a0d0e21e LW |
1110 | HV* stash; |
1111 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) | |
1112 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c')) | |
a6006777 | 1113 | && (ocvp = cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1114 | ? (oamtp = amtp = (AMT*)mg->mg_ptr)->table | |
8ac85365 | 1115 | : (CV **) NULL)) |
748a9306 LW |
1116 | && ((cv = cvp[off=method+assignshift]) |
1117 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to | |
1118 | * usual method */ | |
1119 | (fl = 1, cv = cvp[off=method])))) { | |
a0d0e21e LW |
1120 | lr = -1; /* Call method for left argument */ |
1121 | } else { | |
1122 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { | |
1123 | int logic; | |
1124 | ||
1125 | /* look for substituted methods */ | |
1126 | switch (method) { | |
1127 | case inc_amg: | |
748a9306 | 1128 | if (((cv = cvp[off=add_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e LW |
1129 | || ((cv = cvp[off=add_amg]) && (postpr=1))) { |
1130 | right = &sv_yes; lr = -1; assign = 1; | |
1131 | } | |
1132 | break; | |
1133 | case dec_amg: | |
748a9306 | 1134 | if (((cv = cvp[off=subtr_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e LW |
1135 | || ((cv = cvp[off=subtr_amg]) && (postpr=1))) { |
1136 | right = &sv_yes; lr = -1; assign = 1; | |
1137 | } | |
1138 | break; | |
1139 | case bool__amg: | |
1140 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); | |
1141 | break; | |
1142 | case numer_amg: | |
1143 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); | |
1144 | break; | |
1145 | case string_amg: | |
1146 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); | |
1147 | break; | |
dc437b57 | 1148 | case not_amg: |
1149 | (void)((cv = cvp[off=bool__amg]) | |
1150 | || (cv = cvp[off=numer_amg]) | |
1151 | || (cv = cvp[off=string_amg])); | |
1152 | postpr = 1; | |
1153 | break; | |
748a9306 LW |
1154 | case copy_amg: |
1155 | { | |
1156 | SV* ref=SvRV(left); | |
fc36a67e | 1157 | if (!SvROK(ref) && SvTYPE(ref) <= SVt_PVMG) { |
1158 | /* | |
1159 | * Just to be extra cautious. Maybe in some | |
1160 | * additional cases sv_setsv is safe, too. | |
1161 | */ | |
748a9306 LW |
1162 | SV* newref = newSVsv(ref); |
1163 | SvOBJECT_on(newref); | |
1164 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(ref)); | |
1165 | return newref; | |
1166 | } | |
1167 | } | |
1168 | break; | |
a0d0e21e | 1169 | case abs_amg: |
748a9306 | 1170 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e | 1171 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 | 1172 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e | 1173 | if (off1==lt_amg) { |
748a9306 | 1174 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
1175 | lt_amg,AMGf_noright); |
1176 | logic = SvTRUE(lessp); | |
1177 | } else { | |
748a9306 | 1178 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e LW |
1179 | ncmp_amg,AMGf_noright); |
1180 | logic = (SvNV(lessp) < 0); | |
1181 | } | |
1182 | if (logic) { | |
1183 | if (off==subtr_amg) { | |
1184 | right = left; | |
748a9306 | 1185 | left = nullsv; |
a0d0e21e LW |
1186 | lr = 1; |
1187 | } | |
1188 | } else { | |
1189 | return left; | |
1190 | } | |
1191 | } | |
1192 | break; | |
1193 | case neg_amg: | |
1194 | if (cv = cvp[off=subtr_amg]) { | |
1195 | right = left; | |
1196 | left = sv_2mortal(newSViv(0)); | |
1197 | lr = 1; | |
1198 | } | |
1199 | break; | |
1200 | default: | |
1201 | goto not_found; | |
1202 | } | |
1203 | if (!cv) goto not_found; | |
1204 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) | |
1205 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c')) | |
a6006777 | 1206 | && (cvp = (AMT_AMAGIC((AMT*)mg->mg_ptr) |
1207 | ? (amtp = (AMT*)mg->mg_ptr)->table | |
8ac85365 | 1208 | : (CV **) NULL)) |
a0d0e21e LW |
1209 | && (cv = cvp[off=method])) { /* Method for right |
1210 | * argument found */ | |
1211 | lr=1; | |
748a9306 | 1212 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
4633a7c4 | 1213 | && (cvp=ocvp) && (lr = -1)) |
a0d0e21e LW |
1214 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
1215 | && !(flags & AMGf_unary)) { | |
1216 | /* We look for substitution for | |
1217 | * comparison operations and | |
fc36a67e | 1218 | * concatenation */ |
a0d0e21e LW |
1219 | if (method==concat_amg || method==concat_ass_amg |
1220 | || method==repeat_amg || method==repeat_ass_amg) { | |
1221 | return NULL; /* Delegate operation to string conversion */ | |
1222 | } | |
1223 | off = -1; | |
1224 | switch (method) { | |
1225 | case lt_amg: | |
1226 | case le_amg: | |
1227 | case gt_amg: | |
1228 | case ge_amg: | |
1229 | case eq_amg: | |
1230 | case ne_amg: | |
1231 | postpr = 1; off=ncmp_amg; break; | |
1232 | case slt_amg: | |
1233 | case sle_amg: | |
1234 | case sgt_amg: | |
1235 | case sge_amg: | |
1236 | case seq_amg: | |
1237 | case sne_amg: | |
1238 | postpr = 1; off=scmp_amg; break; | |
1239 | } | |
1240 | if (off != -1) cv = cvp[off]; | |
1241 | if (!cv) { | |
1242 | goto not_found; | |
1243 | } | |
1244 | } else { | |
a6006777 | 1245 | not_found: /* No method found, either report or croak */ |
a0d0e21e LW |
1246 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1247 | notfound = 1; lr = -1; | |
1248 | } else if (cvp && (cv=cvp[nomethod_amg])) { | |
1249 | notfound = 1; lr = 1; | |
1250 | } else { | |
46fc3d4c | 1251 | SV *msg; |
774d564b | 1252 | if (off==-1) off=method; |
46fc3d4c | 1253 | msg = sv_2mortal(newSVpvf( |
1254 | "Operation `%s': no method found,%sargument %s%s%s%s", | |
a6006777 | 1255 | AMG_names[method + assignshift], |
e7ea3e70 | 1256 | (flags & AMGf_unary ? " " : "\n\tleft "), |
a0d0e21e LW |
1257 | SvAMAGIC(left)? |
1258 | "in overloaded package ": | |
1259 | "has no overloaded magic", | |
1260 | SvAMAGIC(left)? | |
1261 | HvNAME(SvSTASH(SvRV(left))): | |
1262 | "", | |
1263 | SvAMAGIC(right)? | |
e7ea3e70 IZ |
1264 | ",\n\tright argument in overloaded package ": |
1265 | (flags & AMGf_unary | |
1266 | ? "" | |
1267 | : ",\n\tright argument has no overloaded magic"), | |
a0d0e21e LW |
1268 | SvAMAGIC(right)? |
1269 | HvNAME(SvSTASH(SvRV(right))): | |
46fc3d4c | 1270 | "")); |
a0d0e21e | 1271 | if (amtp && amtp->fallback >= AMGfallYES) { |
46fc3d4c | 1272 | DEBUG_o( deb("%s", SvPVX(msg)) ); |
a0d0e21e | 1273 | } else { |
fc36a67e | 1274 | croak("%_", msg); |
a0d0e21e LW |
1275 | } |
1276 | return NULL; | |
1277 | } | |
1278 | } | |
1279 | } | |
1280 | if (!notfound) { | |
774d564b | 1281 | DEBUG_o( deb( |
46fc3d4c | 1282 | "Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %s%s\n", |
a6006777 | 1283 | AMG_names[off], |
748a9306 LW |
1284 | method+assignshift==off? "" : |
1285 | " (initially `", | |
1286 | method+assignshift==off? "" : | |
a6006777 | 1287 | AMG_names[method+assignshift], |
748a9306 LW |
1288 | method+assignshift==off? "" : "')", |
1289 | flags & AMGf_unary? "" : | |
1290 | lr==1 ? " for right argument": " for left argument", | |
1291 | flags & AMGf_unary? " for argument" : "", | |
a0d0e21e LW |
1292 | HvNAME(stash), |
1293 | fl? ",\n\tassignment variant used": "") ); | |
748a9306 LW |
1294 | /* Since we use shallow copy during assignment, we need |
1295 | * to dublicate the contents, probably calling user-supplied | |
1296 | * version of copy operator | |
1297 | */ | |
c07a80fd | 1298 | if ((method + assignshift==off |
748a9306 LW |
1299 | && (assign || method==inc_amg || method==dec_amg)) |
1300 | || inc_dec_ass) RvDEEPCP(left); | |
a0d0e21e LW |
1301 | } |
1302 | { | |
1303 | dSP; | |
1304 | BINOP myop; | |
1305 | SV* res; | |
54310121 | 1306 | bool oldcatch = CATCH_GET; |
a0d0e21e | 1307 | |
54310121 | 1308 | CATCH_SET(TRUE); |
a0d0e21e LW |
1309 | Zero(&myop, 1, BINOP); |
1310 | myop.op_last = (OP *) &myop; | |
1311 | myop.op_next = Nullop; | |
54310121 | 1312 | myop.op_flags = OPf_WANT_SCALAR | OPf_STACKED; |
a0d0e21e LW |
1313 | |
1314 | ENTER; | |
462e5cf6 | 1315 | SAVEOP(); |
a0d0e21e | 1316 | op = (OP *) &myop; |
84902520 | 1317 | if (PERLDB_SUB && curstash != debstash) |
dc437b57 | 1318 | op->op_private |= OPpENTERSUB_DB; |
a0d0e21e | 1319 | PUTBACK; |
11343788 | 1320 | pp_pushmark(ARGS); |
a0d0e21e LW |
1321 | |
1322 | EXTEND(sp, notfound + 5); | |
1323 | PUSHs(lr>0? right: left); | |
1324 | PUSHs(lr>0? left: right); | |
5167a5b1 | 1325 | PUSHs( lr > 0 ? &sv_yes : ( assign ? &sv_undef : &sv_no )); |
a0d0e21e | 1326 | if (notfound) { |
a6006777 | 1327 | PUSHs( sv_2mortal(newSVpv((char *)AMG_names[method + assignshift],0)) ); |
a0d0e21e LW |
1328 | } |
1329 | PUSHs((SV*)cv); | |
1330 | PUTBACK; | |
1331 | ||
11343788 | 1332 | if (op = pp_entersub(ARGS)) |
ad8898e0 | 1333 | runops(); |
a0d0e21e LW |
1334 | LEAVE; |
1335 | SPAGAIN; | |
1336 | ||
1337 | res=POPs; | |
1338 | PUTBACK; | |
54310121 | 1339 | CATCH_SET(oldcatch); |
a0d0e21e | 1340 | |
a0d0e21e LW |
1341 | if (postpr) { |
1342 | int ans; | |
1343 | switch (method) { | |
1344 | case le_amg: | |
1345 | case sle_amg: | |
1346 | ans=SvIV(res)<=0; break; | |
1347 | case lt_amg: | |
1348 | case slt_amg: | |
1349 | ans=SvIV(res)<0; break; | |
1350 | case ge_amg: | |
1351 | case sge_amg: | |
1352 | ans=SvIV(res)>=0; break; | |
1353 | case gt_amg: | |
1354 | case sgt_amg: | |
1355 | ans=SvIV(res)>0; break; | |
1356 | case eq_amg: | |
1357 | case seq_amg: | |
1358 | ans=SvIV(res)==0; break; | |
1359 | case ne_amg: | |
1360 | case sne_amg: | |
1361 | ans=SvIV(res)!=0; break; | |
1362 | case inc_amg: | |
1363 | case dec_amg: | |
bbce6d69 | 1364 | SvSetSV(left,res); return left; |
dc437b57 | 1365 | case not_amg: |
44a8e56a | 1366 | ans=!SvOK(res); break; |
a0d0e21e | 1367 | } |
54310121 | 1368 | return boolSV(ans); |
748a9306 LW |
1369 | } else if (method==copy_amg) { |
1370 | if (!SvROK(res)) { | |
a6006777 | 1371 | croak("Copy method did not return a reference"); |
748a9306 LW |
1372 | } |
1373 | return SvREFCNT_inc(SvRV(res)); | |
a0d0e21e LW |
1374 | } else { |
1375 | return res; | |
1376 | } | |
1377 | } | |
1378 | } | |
1379 | #endif /* OVERLOAD */ | |
4e35701f | 1380 |