Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | /* gv.c |
79072805 | 2 | * |
a0d0e21e | 3 | * Copyright (c) 1991-1994, 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 | ||
463ee0b2 | 22 | extern 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]; | |
62 | GV *gv; | |
63 | ||
8990e307 | 64 | sprintf(tmpbuf,"::_<%s", name); |
85e6fe83 | 65 | gv = gv_fetchpv(tmpbuf, TRUE, SVt_PVGV); |
79072805 | 66 | sv_setpv(GvSV(gv), name); |
a0d0e21e | 67 | if (*name == '/' && (instr(name,"/lib/") || instr(name,".pm"))) |
8990e307 | 68 | SvMULTI_on(gv); |
79072805 | 69 | if (perldb) |
93a17b20 | 70 | hv_magic(GvHVn(gv_AVadd(gv)), gv, 'L'); |
79072805 LW |
71 | return gv; |
72 | } | |
73 | ||
463ee0b2 LW |
74 | void |
75 | gv_init(gv, stash, name, len, multi) | |
76 | GV *gv; | |
77 | HV *stash; | |
78 | char *name; | |
79 | STRLEN len; | |
80 | int multi; | |
81 | { | |
82 | register GP *gp; | |
83 | ||
84 | sv_upgrade(gv, SVt_PVGV); | |
85 | if (SvLEN(gv)) | |
86 | Safefree(SvPVX(gv)); | |
87 | Newz(602,gp, 1, GP); | |
8990e307 | 88 | GvGP(gv) = gp_ref(gp); |
463ee0b2 LW |
89 | GvREFCNT(gv) = 1; |
90 | GvSV(gv) = NEWSV(72,0); | |
91 | GvLINE(gv) = curcop->cop_line; | |
8990e307 | 92 | GvFILEGV(gv) = curcop->cop_filegv; |
463ee0b2 LW |
93 | GvEGV(gv) = gv; |
94 | sv_magic((SV*)gv, (SV*)gv, '*', name, len); | |
95 | GvSTASH(gv) = stash; | |
a0d0e21e | 96 | GvNAME(gv) = savepvn(name, len); |
463ee0b2 LW |
97 | GvNAMELEN(gv) = len; |
98 | if (multi) | |
99 | SvMULTI_on(gv); | |
100 | } | |
101 | ||
a0d0e21e LW |
102 | static void |
103 | gv_init_sv(gv, sv_type) | |
104 | GV* gv; | |
105 | I32 sv_type; | |
106 | { | |
107 | switch (sv_type) { | |
108 | case SVt_PVIO: | |
109 | (void)GvIOn(gv); | |
110 | break; | |
111 | case SVt_PVAV: | |
112 | (void)GvAVn(gv); | |
113 | break; | |
114 | case SVt_PVHV: | |
115 | (void)GvHVn(gv); | |
116 | break; | |
117 | } | |
118 | } | |
119 | ||
79072805 | 120 | GV * |
a0d0e21e | 121 | gv_fetchmeth(stash, name, len, level) |
79072805 LW |
122 | HV* stash; |
123 | char* name; | |
463ee0b2 | 124 | STRLEN len; |
a0d0e21e | 125 | I32 level; |
79072805 LW |
126 | { |
127 | AV* av; | |
463ee0b2 | 128 | GV* topgv; |
79072805 | 129 | GV* gv; |
463ee0b2 | 130 | GV** gvp; |
a0d0e21e LW |
131 | HV* lastchance; |
132 | ||
133 | if (!stash) | |
134 | return 0; | |
135 | if (level > 100) | |
136 | croak("Recursive inheritance detected"); | |
463ee0b2 LW |
137 | |
138 | gvp = (GV**)hv_fetch(stash, name, len, TRUE); | |
139 | ||
140 | DEBUG_o( deb("Looking for method %s in package %s\n",name,HvNAME(stash)) ); | |
141 | topgv = *gvp; | |
142 | if (SvTYPE(topgv) != SVt_PVGV) | |
143 | gv_init(topgv, stash, name, len, TRUE); | |
144 | ||
145 | if (GvCV(topgv)) { | |
146 | if (!GvCVGEN(topgv) || GvCVGEN(topgv) >= sub_generation) | |
147 | return topgv; | |
148 | } | |
79072805 LW |
149 | |
150 | gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE); | |
151 | if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) { | |
152 | SV** svp = AvARRAY(av); | |
153 | I32 items = AvFILL(av) + 1; | |
154 | while (items--) { | |
79072805 | 155 | SV* sv = *svp++; |
a0d0e21e | 156 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 | 157 | if (!basestash) { |
79072805 | 158 | if (dowarn) |
a0d0e21e | 159 | warn("Can't locate package %s for @%s::ISA", |
463ee0b2 | 160 | SvPVX(sv), HvNAME(stash)); |
79072805 LW |
161 | continue; |
162 | } | |
a0d0e21e | 163 | gv = gv_fetchmeth(basestash, name, len, level + 1); |
463ee0b2 LW |
164 | if (gv) { |
165 | GvCV(topgv) = GvCV(gv); /* cache the CV */ | |
166 | GvCVGEN(topgv) = sub_generation; /* valid for now */ | |
79072805 | 167 | return gv; |
463ee0b2 | 168 | } |
79072805 LW |
169 | } |
170 | } | |
a0d0e21e LW |
171 | |
172 | if (!level) { | |
173 | if (lastchance = gv_stashpv("UNIVERSAL", FALSE)) { | |
174 | if (gv = gv_fetchmeth(lastchance, name, len, level + 1)) { | |
175 | GvCV(topgv) = GvCV(gv); /* cache the CV */ | |
176 | GvCVGEN(topgv) = sub_generation; /* valid for now */ | |
177 | return gv; | |
178 | } | |
179 | } | |
180 | } | |
181 | ||
79072805 LW |
182 | return 0; |
183 | } | |
184 | ||
185 | GV * | |
463ee0b2 LW |
186 | gv_fetchmethod(stash, name) |
187 | HV* stash; | |
188 | char* name; | |
189 | { | |
190 | register char *nend; | |
a0d0e21e LW |
191 | char *nsplit = 0; |
192 | GV* gv; | |
463ee0b2 LW |
193 | |
194 | for (nend = name; *nend; nend++) { | |
a0d0e21e LW |
195 | if (*nend == ':' || *nend == '\'') |
196 | nsplit = nend; | |
197 | } | |
198 | if (nsplit) { | |
199 | char ch; | |
200 | char *origname = name; | |
201 | name = nsplit + 1; | |
202 | ch = *nsplit; | |
203 | if (*nsplit == ':') | |
204 | --nsplit; | |
205 | *nsplit = '\0'; | |
206 | stash = gv_stashpv(origname,TRUE); | |
207 | *nsplit = ch; | |
208 | } | |
209 | gv = gv_fetchmeth(stash, name, nend - name, 0); | |
210 | if (!gv) { | |
211 | CV* cv; | |
212 | ||
213 | if (strEQ(name,"import") || strEQ(name,"unimport")) | |
214 | gv = &sv_yes; | |
215 | else if (strNE(name, "AUTOLOAD")) { | |
216 | gv = gv_fetchmeth(stash, "AUTOLOAD", 8, 0); | |
217 | if (gv && (cv = GvCV(gv))) { /* One more chance... */ | |
218 | SV *tmpstr = sv_newmortal(); | |
219 | sv_catpv(tmpstr,HvNAME(stash)); | |
220 | sv_catpvn(tmpstr,"::", 2); | |
221 | sv_catpvn(tmpstr, name, nend - name); | |
222 | sv_setsv(GvSV(CvGV(cv)), tmpstr); | |
223 | } | |
463ee0b2 LW |
224 | } |
225 | } | |
a0d0e21e LW |
226 | return gv; |
227 | } | |
228 | ||
229 | HV* | |
230 | gv_stashpv(name,create) | |
231 | char *name; | |
232 | I32 create; | |
233 | { | |
234 | char tmpbuf[1234]; | |
235 | HV *stash; | |
236 | GV *tmpgv; | |
237 | sprintf(tmpbuf,"%.*s::",1200,name); | |
238 | tmpgv = gv_fetchpv(tmpbuf,create, SVt_PVHV); | |
239 | if (!tmpgv) | |
240 | return 0; | |
241 | if (!GvHV(tmpgv)) | |
242 | GvHV(tmpgv) = newHV(); | |
243 | stash = GvHV(tmpgv); | |
244 | if (!HvNAME(stash)) | |
245 | HvNAME(stash) = savepv(name); | |
246 | return stash; | |
463ee0b2 LW |
247 | } |
248 | ||
a0d0e21e LW |
249 | HV* |
250 | gv_stashsv(sv,create) | |
251 | SV *sv; | |
252 | I32 create; | |
253 | { | |
254 | return gv_stashpv(SvPV(sv,na), create); | |
255 | } | |
256 | ||
257 | ||
463ee0b2 | 258 | GV * |
a0d0e21e | 259 | gv_fetchpv(nambeg,add,sv_type) |
463ee0b2 | 260 | char *nambeg; |
79072805 | 261 | I32 add; |
a0d0e21e | 262 | I32 sv_type; |
79072805 | 263 | { |
463ee0b2 LW |
264 | register char *name = nambeg; |
265 | register GV *gv = 0; | |
79072805 | 266 | GV**gvp; |
79072805 LW |
267 | I32 len; |
268 | register char *namend; | |
463ee0b2 | 269 | HV *stash = 0; |
79072805 | 270 | bool global = FALSE; |
85e6fe83 | 271 | char *tmpbuf; |
79072805 | 272 | |
79072805 | 273 | for (namend = name; *namend; namend++) { |
463ee0b2 LW |
274 | if ((*namend == '\'' && namend[1]) || |
275 | (*namend == ':' && namend[1] == ':')) | |
276 | { | |
463ee0b2 LW |
277 | if (!stash) |
278 | stash = defstash; | |
a0d0e21e LW |
279 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
280 | return Nullgv; | |
463ee0b2 | 281 | |
85e6fe83 LW |
282 | len = namend - name; |
283 | if (len > 0) { | |
a0d0e21e LW |
284 | New(601, tmpbuf, len+3, char); |
285 | Copy(name, tmpbuf, len, char); | |
286 | tmpbuf[len++] = ':'; | |
287 | tmpbuf[len++] = ':'; | |
288 | tmpbuf[len] = '\0'; | |
463ee0b2 | 289 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
85e6fe83 | 290 | Safefree(tmpbuf); |
463ee0b2 LW |
291 | if (!gvp || *gvp == (GV*)&sv_undef) |
292 | return Nullgv; | |
293 | gv = *gvp; | |
85e6fe83 | 294 | |
463ee0b2 LW |
295 | if (SvTYPE(gv) == SVt_PVGV) |
296 | SvMULTI_on(gv); | |
a0d0e21e LW |
297 | else if (!add) |
298 | return Nullgv; | |
463ee0b2 LW |
299 | else |
300 | gv_init(gv, stash, nambeg, namend - nambeg, (add & 2)); | |
85e6fe83 | 301 | |
463ee0b2 LW |
302 | if (!(stash = GvHV(gv))) |
303 | stash = GvHV(gv) = newHV(); | |
85e6fe83 | 304 | |
463ee0b2 | 305 | if (!HvNAME(stash)) |
a0d0e21e | 306 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 LW |
307 | } |
308 | ||
309 | if (*namend == ':') | |
310 | namend++; | |
311 | namend++; | |
312 | name = namend; | |
313 | if (!*name) | |
a0d0e21e | 314 | return gv ? gv : *hv_fetch(defstash, "main::", 6, TRUE); |
79072805 | 315 | } |
79072805 | 316 | } |
a0d0e21e LW |
317 | len = namend - name; |
318 | if (!len) | |
319 | len = 1; | |
463ee0b2 LW |
320 | |
321 | /* No stash in name, so see how we can default */ | |
322 | ||
323 | if (!stash) { | |
324 | if (isIDFIRST(*name)) { | |
325 | if (isUPPER(*name)) { | |
326 | if (*name > 'I') { | |
327 | if (*name == 'S' && ( | |
328 | strEQ(name, "SIG") || | |
329 | strEQ(name, "STDIN") || | |
330 | strEQ(name, "STDOUT") || | |
331 | strEQ(name, "STDERR") )) | |
332 | global = TRUE; | |
333 | } | |
334 | else if (*name > 'E') { | |
335 | if (*name == 'I' && strEQ(name, "INC")) | |
336 | global = TRUE; | |
337 | } | |
338 | else if (*name > 'A') { | |
339 | if (*name == 'E' && strEQ(name, "ENV")) | |
340 | global = TRUE; | |
341 | } | |
342 | else if (*name == 'A' && ( | |
343 | strEQ(name, "ARGV") || | |
344 | strEQ(name, "ARGVOUT") )) | |
345 | global = TRUE; | |
346 | } | |
347 | else if (*name == '_' && !name[1]) | |
348 | global = TRUE; | |
349 | if (global) | |
350 | stash = defstash; | |
85e6fe83 | 351 | else if ((COP*)curcop == &compiling) { |
a0d0e21e LW |
352 | stash = curstash; |
353 | if (add && (hints & HINT_STRICT_VARS) && sv_type != SVt_PVCV) { | |
354 | if (stash && !hv_fetch(stash,name,len,0)) | |
355 | stash = 0; | |
356 | } | |
85e6fe83 | 357 | } |
463ee0b2 LW |
358 | else |
359 | stash = curcop->cop_stash; | |
360 | } | |
361 | else | |
362 | stash = defstash; | |
363 | } | |
364 | ||
365 | /* By this point we should have a stash and a name */ | |
366 | ||
a0d0e21e LW |
367 | if (!stash) { |
368 | if (add) { | |
369 | warn("Global symbol \"%s\" requires explicit package name", name); | |
370 | ++error_count; | |
371 | stash = curstash ? curstash : defstash; /* avoid core dumps */ | |
372 | } | |
373 | else | |
374 | return Nullgv; | |
375 | } | |
376 | ||
377 | if (!SvREFCNT(stash)) /* symbol table under destruction */ | |
378 | return Nullgv; | |
379 | ||
79072805 LW |
380 | gvp = (GV**)hv_fetch(stash,name,len,add); |
381 | if (!gvp || *gvp == (GV*)&sv_undef) | |
382 | return Nullgv; | |
383 | gv = *gvp; | |
384 | if (SvTYPE(gv) == SVt_PVGV) { | |
a0d0e21e LW |
385 | if (add) { |
386 | SvMULTI_on(gv); | |
387 | gv_init_sv(gv, sv_type); | |
388 | } | |
79072805 LW |
389 | return gv; |
390 | } | |
93a17b20 LW |
391 | |
392 | /* Adding a new symbol */ | |
393 | ||
a0d0e21e LW |
394 | if (add & 4) |
395 | warn("Had to create %s unexpectedly", nambeg); | |
463ee0b2 | 396 | gv_init(gv, stash, name, len, add & 2); |
a0d0e21e | 397 | gv_init_sv(gv, sv_type); |
93a17b20 LW |
398 | |
399 | /* set up magic where warranted */ | |
400 | switch (*name) { | |
a0d0e21e LW |
401 | case 'A': |
402 | if (strEQ(name, "ARGV")) { | |
403 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; | |
404 | } | |
405 | break; | |
406 | ||
ed6116ce LW |
407 | case 'a': |
408 | case 'b': | |
409 | if (len == 1) | |
410 | SvMULTI_on(gv); | |
411 | break; | |
a0d0e21e LW |
412 | case 'E': |
413 | if (strnEQ(name, "EXPORT", 6)) | |
414 | SvMULTI_on(gv); | |
415 | break; | |
463ee0b2 LW |
416 | case 'I': |
417 | if (strEQ(name, "ISA")) { | |
418 | AV* av = GvAVn(gv); | |
8990e307 | 419 | SvMULTI_on(gv); |
a0d0e21e LW |
420 | sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0); |
421 | if (add & 2 && strEQ(nambeg,"AnyDBM_File::ISA") && AvFILL(av) == -1) | |
85e6fe83 | 422 | { |
a0d0e21e LW |
423 | char *pname; |
424 | av_push(av, newSVpv(pname = "NDBM_File",0)); | |
425 | gv_stashpv(pname, TRUE); | |
426 | av_push(av, newSVpv(pname = "DB_File",0)); | |
427 | gv_stashpv(pname, TRUE); | |
428 | av_push(av, newSVpv(pname = "GDBM_File",0)); | |
429 | gv_stashpv(pname, TRUE); | |
430 | av_push(av, newSVpv(pname = "SDBM_File",0)); | |
431 | gv_stashpv(pname, TRUE); | |
432 | av_push(av, newSVpv(pname = "ODBM_File",0)); | |
433 | gv_stashpv(pname, TRUE); | |
85e6fe83 | 434 | } |
463ee0b2 LW |
435 | } |
436 | break; | |
a0d0e21e LW |
437 | #ifdef OVERLOAD |
438 | case 'O': | |
439 | if (strEQ(name, "OVERLOAD")) { | |
440 | HV* hv = GvHVn(gv); | |
441 | SvMULTI_on(gv); | |
442 | sv_magic((SV*)hv, (SV*)gv, 'A', 0, 0); | |
443 | } | |
444 | break; | |
445 | #endif /* OVERLOAD */ | |
93a17b20 LW |
446 | case 'S': |
447 | if (strEQ(name, "SIG")) { | |
448 | HV *hv; | |
449 | siggv = gv; | |
450 | SvMULTI_on(siggv); | |
451 | hv = GvHVn(siggv); | |
452 | hv_magic(hv, siggv, 'S'); | |
453 | ||
454 | /* initialize signal stack */ | |
455 | signalstack = newAV(); | |
93a17b20 | 456 | AvREAL_off(signalstack); |
a0d0e21e LW |
457 | av_extend(signalstack, 30); |
458 | av_fill(signalstack, 0); | |
93a17b20 LW |
459 | } |
460 | break; | |
461 | ||
462 | case '&': | |
463ee0b2 LW |
463 | if (len > 1) |
464 | break; | |
93a17b20 LW |
465 | ampergv = gv; |
466 | sawampersand = TRUE; | |
a0d0e21e | 467 | goto ro_magicalize; |
93a17b20 LW |
468 | |
469 | case '`': | |
463ee0b2 LW |
470 | if (len > 1) |
471 | break; | |
93a17b20 LW |
472 | leftgv = gv; |
473 | sawampersand = TRUE; | |
a0d0e21e | 474 | goto ro_magicalize; |
93a17b20 LW |
475 | |
476 | case '\'': | |
463ee0b2 LW |
477 | if (len > 1) |
478 | break; | |
93a17b20 LW |
479 | rightgv = gv; |
480 | sawampersand = TRUE; | |
a0d0e21e | 481 | goto ro_magicalize; |
93a17b20 LW |
482 | |
483 | case ':': | |
463ee0b2 LW |
484 | if (len > 1) |
485 | break; | |
93a17b20 LW |
486 | sv_setpv(GvSV(gv),chopset); |
487 | goto magicalize; | |
488 | ||
93a17b20 | 489 | case '#': |
a0d0e21e LW |
490 | case '*': |
491 | if (dowarn && len == 1 && sv_type == SVt_PV) | |
492 | warn("Use of $%s is deprecated", name); | |
493 | /* FALL THROUGH */ | |
494 | case '[': | |
495 | case '!': | |
93a17b20 LW |
496 | case '?': |
497 | case '^': | |
498 | case '~': | |
499 | case '=': | |
500 | case '-': | |
501 | case '%': | |
502 | case '.': | |
93a17b20 LW |
503 | case '(': |
504 | case ')': | |
505 | case '<': | |
506 | case '>': | |
507 | case ',': | |
508 | case '\\': | |
509 | case '/': | |
93a17b20 LW |
510 | case '|': |
511 | case '\004': | |
a0d0e21e | 512 | case '\010': |
93a17b20 LW |
513 | case '\t': |
514 | case '\020': | |
515 | case '\024': | |
516 | case '\027': | |
517 | case '\006': | |
463ee0b2 LW |
518 | if (len > 1) |
519 | break; | |
520 | goto magicalize; | |
521 | ||
a0d0e21e | 522 | case '+': |
463ee0b2 LW |
523 | case '1': |
524 | case '2': | |
525 | case '3': | |
526 | case '4': | |
527 | case '5': | |
528 | case '6': | |
529 | case '7': | |
530 | case '8': | |
531 | case '9': | |
a0d0e21e LW |
532 | ro_magicalize: |
533 | SvREADONLY_on(GvSV(gv)); | |
93a17b20 | 534 | magicalize: |
463ee0b2 | 535 | sv_magic(GvSV(gv), (SV*)gv, 0, name, len); |
93a17b20 LW |
536 | break; |
537 | ||
538 | case '\014': | |
463ee0b2 LW |
539 | if (len > 1) |
540 | break; | |
93a17b20 LW |
541 | sv_setpv(GvSV(gv),"\f"); |
542 | formfeed = GvSV(gv); | |
543 | break; | |
544 | case ';': | |
463ee0b2 LW |
545 | if (len > 1) |
546 | break; | |
93a17b20 LW |
547 | sv_setpv(GvSV(gv),"\034"); |
548 | break; | |
463ee0b2 LW |
549 | case ']': |
550 | if (len == 1) { | |
93a17b20 LW |
551 | SV *sv; |
552 | sv = GvSV(gv); | |
553 | sv_upgrade(sv, SVt_PVNV); | |
a0d0e21e | 554 | sv_setpv(sv, patchlevel); |
93a17b20 LW |
555 | } |
556 | break; | |
79072805 | 557 | } |
93a17b20 | 558 | return gv; |
79072805 LW |
559 | } |
560 | ||
561 | void | |
562 | gv_fullname(sv,gv) | |
563 | SV *sv; | |
564 | GV *gv; | |
565 | { | |
566 | HV *hv = GvSTASH(gv); | |
567 | ||
568 | if (!hv) | |
569 | return; | |
570 | sv_setpv(sv, sv == (SV*)gv ? "*" : ""); | |
571 | sv_catpv(sv,HvNAME(hv)); | |
463ee0b2 | 572 | sv_catpvn(sv,"::", 2); |
79072805 LW |
573 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
574 | } | |
575 | ||
576 | void | |
577 | gv_efullname(sv,gv) | |
578 | SV *sv; | |
579 | GV *gv; | |
580 | { | |
581 | GV* egv = GvEGV(gv); | |
582 | HV *hv = GvSTASH(egv); | |
583 | ||
584 | if (!hv) | |
585 | return; | |
586 | sv_setpv(sv, sv == (SV*)gv ? "*" : ""); | |
587 | sv_catpv(sv,HvNAME(hv)); | |
463ee0b2 | 588 | sv_catpvn(sv,"::", 2); |
79072805 LW |
589 | sv_catpvn(sv,GvNAME(egv),GvNAMELEN(egv)); |
590 | } | |
591 | ||
592 | IO * | |
593 | newIO() | |
594 | { | |
595 | IO *io; | |
8990e307 LW |
596 | GV *iogv; |
597 | ||
598 | io = (IO*)NEWSV(0,0); | |
a0d0e21e | 599 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 LW |
600 | SvREFCNT(io) = 1; |
601 | SvOBJECT_on(io); | |
85e6fe83 | 602 | iogv = gv_fetchpv("FileHandle::", TRUE, SVt_PVIO); |
8990e307 | 603 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 LW |
604 | return io; |
605 | } | |
606 | ||
607 | void | |
463ee0b2 LW |
608 | gv_check(stash) |
609 | HV* stash; | |
79072805 LW |
610 | { |
611 | register HE *entry; | |
612 | register I32 i; | |
613 | register GV *gv; | |
463ee0b2 | 614 | HV *hv; |
a0d0e21e | 615 | GV *filegv; |
463ee0b2 | 616 | |
8990e307 LW |
617 | if (!HvARRAY(stash)) |
618 | return; | |
a0d0e21e | 619 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
463ee0b2 | 620 | for (entry = HvARRAY(stash)[i]; entry; entry = entry->hent_next) { |
a0d0e21e LW |
621 | if (entry->hent_key[entry->hent_klen-1] == ':' && |
622 | (gv = (GV*)entry->hent_val) && (hv = GvHV(gv)) && HvNAME(hv)) | |
623 | { | |
624 | if (hv != defstash) | |
625 | gv_check(hv); /* nested package */ | |
626 | } | |
627 | else if (isALPHA(*entry->hent_key)) { | |
463ee0b2 LW |
628 | gv = (GV*)entry->hent_val; |
629 | if (SvMULTI(gv)) | |
630 | continue; | |
631 | curcop->cop_line = GvLINE(gv); | |
a0d0e21e LW |
632 | filegv = GvFILEGV(gv); |
633 | curcop->cop_filegv = filegv; | |
634 | if (filegv && SvMULTI(filegv)) /* Filename began with slash */ | |
8990e307 | 635 | continue; |
a0d0e21e LW |
636 | warn("Identifier \"%s::%s\" used only once: possible typo", |
637 | HvNAME(stash), GvNAME(gv)); | |
463ee0b2 | 638 | } |
79072805 LW |
639 | } |
640 | } | |
641 | } | |
642 | ||
643 | GV * | |
a0d0e21e LW |
644 | newGVgen(pack) |
645 | char *pack; | |
79072805 | 646 | { |
a0d0e21e | 647 | (void)sprintf(tokenbuf,"%s::_GEN_%ld",pack,(long)gensym++); |
85e6fe83 | 648 | return gv_fetchpv(tokenbuf,TRUE, SVt_PVGV); |
79072805 LW |
649 | } |
650 | ||
651 | /* hopefully this is only called on local symbol table entries */ | |
652 | ||
653 | GP* | |
654 | gp_ref(gp) | |
655 | GP* gp; | |
656 | { | |
657 | gp->gp_refcnt++; | |
658 | return gp; | |
659 | ||
660 | } | |
661 | ||
662 | void | |
663 | gp_free(gv) | |
664 | GV* gv; | |
665 | { | |
666 | IO *io; | |
667 | CV *cv; | |
668 | GP* gp; | |
669 | ||
670 | if (!gv || !(gp = GvGP(gv))) | |
671 | return; | |
672 | if (gp->gp_refcnt == 0) { | |
673 | warn("Attempt to free unreferenced glob pointers"); | |
674 | return; | |
675 | } | |
676 | if (--gp->gp_refcnt > 0) | |
677 | return; | |
678 | ||
8990e307 LW |
679 | SvREFCNT_dec(gp->gp_sv); |
680 | SvREFCNT_dec(gp->gp_av); | |
681 | SvREFCNT_dec(gp->gp_hv); | |
682 | if ((io = gp->gp_io) && SvTYPE(io) != SVTYPEMASK) { | |
79072805 | 683 | do_close(gv,FALSE); |
8990e307 | 684 | SvREFCNT_dec(io); |
79072805 | 685 | } |
8990e307 LW |
686 | if ((cv = gp->gp_cv) && !GvCVGEN(gv)) |
687 | SvREFCNT_dec(cv); | |
79072805 LW |
688 | Safefree(gp); |
689 | GvGP(gv) = 0; | |
690 | } | |
691 | ||
692 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) | |
693 | #define MICROPORT | |
694 | #endif | |
695 | ||
696 | #ifdef MICROPORT /* Microport 2.4 hack */ | |
697 | AV *GvAVn(gv) | |
698 | register GV *gv; | |
699 | { | |
700 | if (GvGP(gv)->gp_av) | |
701 | return GvGP(gv)->gp_av; | |
702 | else | |
703 | return GvGP(gv_AVadd(gv))->gp_av; | |
704 | } | |
705 | ||
706 | HV *GvHVn(gv) | |
707 | register GV *gv; | |
708 | { | |
709 | if (GvGP(gv)->gp_hv) | |
710 | return GvGP(gv)->gp_hv; | |
711 | else | |
712 | return GvGP(gv_HVadd(gv))->gp_hv; | |
713 | } | |
714 | #endif /* Microport 2.4 hack */ | |
a0d0e21e LW |
715 | |
716 | #ifdef OVERLOAD | |
717 | /* Updates and caches the CV's */ | |
718 | ||
719 | bool | |
720 | Gv_AMupdate(stash) | |
721 | HV* stash; | |
722 | { | |
723 | GV** gvp; | |
724 | HV* hv; | |
725 | GV* gv; | |
726 | CV* cv; | |
727 | MAGIC* mg=mg_find((SV*)stash,'c'); | |
728 | AMT *amtp; | |
729 | ||
730 | if (mg && (amtp=((AMT*)(mg->mg_ptr)))->was_ok_am == amagic_generation && | |
731 | amtp->was_ok_sub == sub_generation) | |
732 | return HV_AMAGIC(stash)? TRUE: FALSE; | |
733 | gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); | |
734 | sv_unmagic((SV*)stash, 'c'); | |
735 | ||
736 | DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) ); | |
737 | ||
738 | if (gvp && ((gv = *gvp) != (GV*)&sv_undef && (hv = GvHV(gv)))) { | |
739 | int filled=0; | |
740 | int i; | |
741 | char *cp; | |
742 | AMT amt; | |
743 | SV* sv; | |
744 | SV** svp; | |
745 | ||
746 | /* if (*(svp)==(SV*)amagic_generation && *(svp+1)==(SV*)sub_generation) { | |
747 | DEBUG_o( deb("Overload magic in package %s up-to-date\n",HvNAME(stash)) | |
748 | ); | |
749 | return HV_AMAGIC(stash)? TRUE: FALSE; | |
750 | }*/ | |
751 | ||
752 | amt.was_ok_am=amagic_generation; | |
753 | amt.was_ok_sub=sub_generation; | |
754 | amt.fallback=AMGfallNO; | |
755 | ||
756 | /* Work with "fallback" key, which we assume to be first in AMG_names */ | |
757 | ||
758 | if ((cp=((char**)(*AMG_names))[0]) && | |
759 | (svp=(SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) { | |
760 | if (SvTRUE(sv)) amt.fallback=AMGfallYES; | |
761 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; | |
762 | } | |
763 | ||
764 | for (i=1;i<NofAMmeth*2;i++) { | |
765 | cv=0; | |
766 | ||
767 | if ( (cp=((char**)(*AMG_names))[i]) ) { | |
768 | svp=(SV**)hv_fetch(hv,cp,strlen(cp),FALSE); | |
769 | if (svp && ((sv = *svp) != (GV*)&sv_undef)) { | |
770 | switch (SvTYPE(sv)) { | |
771 | default: | |
772 | if (!SvROK(sv)) { | |
773 | if (!SvOK(sv)) break; | |
774 | gv = gv_fetchmethod(curcop->cop_stash, SvPV(sv, na)); | |
775 | if (gv) cv = GvCV(gv); | |
776 | break; | |
777 | } | |
778 | cv = (CV*)SvRV(sv); | |
779 | if (SvTYPE(cv) == SVt_PVCV) | |
780 | break; | |
781 | /* FALL THROUGH */ | |
782 | case SVt_PVHV: | |
783 | case SVt_PVAV: | |
784 | die("Not a subroutine reference in %%OVERLOAD"); | |
785 | return FALSE; | |
786 | case SVt_PVCV: | |
787 | cv = (CV*)sv; | |
788 | break; | |
789 | case SVt_PVGV: | |
790 | if (!(cv = GvCV((GV*)sv))) | |
791 | cv = sv_2cv(sv, &stash, &gv, TRUE); | |
792 | break; | |
793 | } | |
794 | if (cv) filled=1; | |
795 | else { | |
796 | die("Method for operation %s not found in package %s during blessing\n", | |
797 | cp,HvNAME(stash)); | |
798 | return FALSE; | |
799 | } | |
800 | } | |
801 | } | |
802 | amt.table[i]=cv; | |
803 | } | |
804 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(amt)); | |
805 | if (filled) { | |
806 | /* HV_badAMAGIC_off(stash);*/ | |
807 | HV_AMAGIC_on(stash); | |
808 | return TRUE; | |
809 | } | |
810 | } | |
811 | /*HV_badAMAGIC_off(stash);*/ | |
812 | HV_AMAGIC_off(stash); | |
813 | return FALSE; | |
814 | } | |
815 | ||
816 | /* During call to this subroutine stack can be reallocated. It is | |
817 | * advised to call SPAGAIN macro in your code after call */ | |
818 | ||
819 | SV* | |
820 | amagic_call(left,right,method,flags) | |
821 | SV* left; | |
822 | SV* right; | |
823 | int method; | |
824 | int flags; | |
825 | { | |
826 | MAGIC *mg; | |
827 | CV *cv; | |
828 | CV **cvp=NULL, **ocvp=NULL; | |
829 | AMT *amtp, *oamtp; | |
830 | int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; | |
831 | int postpr=0; | |
832 | HV* stash; | |
833 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) | |
834 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c')) | |
835 | && (ocvp = cvp = ((oamtp=amtp=(AMT*)mg->mg_ptr)->table)) | |
836 | && (assign ? | |
837 | ((cv = cvp[off=method+1]) | |
838 | || ( amtp->fallback > AMGfallNEVER && /* fallback to | |
839 | * usual method */ | |
840 | (fl = 1, cv = cvp[off=method]))): | |
841 | (1 && (cv = cvp[off=method])) )) { | |
842 | lr = -1; /* Call method for left argument */ | |
843 | } else { | |
844 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { | |
845 | int logic; | |
846 | ||
847 | /* look for substituted methods */ | |
848 | switch (method) { | |
849 | case inc_amg: | |
850 | if ((cv = cvp[off=add_ass_amg]) | |
851 | || ((cv = cvp[off=add_amg]) && (postpr=1))) { | |
852 | right = &sv_yes; lr = -1; assign = 1; | |
853 | } | |
854 | break; | |
855 | case dec_amg: | |
856 | if ((cv = cvp[off=subtr_ass_amg]) | |
857 | || ((cv = cvp[off=subtr_amg]) && (postpr=1))) { | |
858 | right = &sv_yes; lr = -1; assign = 1; | |
859 | } | |
860 | break; | |
861 | case bool__amg: | |
862 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); | |
863 | break; | |
864 | case numer_amg: | |
865 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); | |
866 | break; | |
867 | case string_amg: | |
868 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); | |
869 | break; | |
870 | case abs_amg: | |
871 | if ((cvp[off1=lt_amg] || cvp[off1=lt_amg]) | |
872 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { | |
873 | if (off1==lt_amg) { | |
874 | SV* lessp = amagic_call(left, | |
875 | sv_2mortal(newSViv(0)), | |
876 | lt_amg,AMGf_noright); | |
877 | logic = SvTRUE(lessp); | |
878 | } else { | |
879 | SV* lessp = amagic_call(left, | |
880 | sv_2mortal(newSViv(0)), | |
881 | ncmp_amg,AMGf_noright); | |
882 | logic = (SvNV(lessp) < 0); | |
883 | } | |
884 | if (logic) { | |
885 | if (off==subtr_amg) { | |
886 | right = left; | |
887 | left = sv_2mortal(newSViv(0)); | |
888 | lr = 1; | |
889 | } | |
890 | } else { | |
891 | return left; | |
892 | } | |
893 | } | |
894 | break; | |
895 | case neg_amg: | |
896 | if (cv = cvp[off=subtr_amg]) { | |
897 | right = left; | |
898 | left = sv_2mortal(newSViv(0)); | |
899 | lr = 1; | |
900 | } | |
901 | break; | |
902 | default: | |
903 | goto not_found; | |
904 | } | |
905 | if (!cv) goto not_found; | |
906 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) | |
907 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c')) | |
908 | && (cvp = ((amtp=(AMT*)mg->mg_ptr)->table)) | |
909 | && (cv = cvp[off=method])) { /* Method for right | |
910 | * argument found */ | |
911 | lr=1; | |
912 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER && (cvp=ocvp)) | |
913 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) | |
914 | && !(flags & AMGf_unary)) { | |
915 | /* We look for substitution for | |
916 | * comparison operations and | |
917 | * concatendation */ | |
918 | if (method==concat_amg || method==concat_ass_amg | |
919 | || method==repeat_amg || method==repeat_ass_amg) { | |
920 | return NULL; /* Delegate operation to string conversion */ | |
921 | } | |
922 | off = -1; | |
923 | switch (method) { | |
924 | case lt_amg: | |
925 | case le_amg: | |
926 | case gt_amg: | |
927 | case ge_amg: | |
928 | case eq_amg: | |
929 | case ne_amg: | |
930 | postpr = 1; off=ncmp_amg; break; | |
931 | case slt_amg: | |
932 | case sle_amg: | |
933 | case sgt_amg: | |
934 | case sge_amg: | |
935 | case seq_amg: | |
936 | case sne_amg: | |
937 | postpr = 1; off=scmp_amg; break; | |
938 | } | |
939 | if (off != -1) cv = cvp[off]; | |
940 | if (!cv) { | |
941 | goto not_found; | |
942 | } | |
943 | } else { | |
944 | not_found: /* No method found, either report or die */ | |
945 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ | |
946 | notfound = 1; lr = -1; | |
947 | } else if (cvp && (cv=cvp[nomethod_amg])) { | |
948 | notfound = 1; lr = 1; | |
949 | } else { | |
950 | char tmpstr[512]; | |
951 | sprintf(tmpstr,"Operation `%s': no method found,\n\tleft argument %s%200s,\n\tright argument %s%200s", | |
952 | ((char**)AMG_names)[off], | |
953 | SvAMAGIC(left)? | |
954 | "in overloaded package ": | |
955 | "has no overloaded magic", | |
956 | SvAMAGIC(left)? | |
957 | HvNAME(SvSTASH(SvRV(left))): | |
958 | "", | |
959 | SvAMAGIC(right)? | |
960 | "in overloaded package ": | |
961 | "has no overloaded magic", | |
962 | SvAMAGIC(right)? | |
963 | HvNAME(SvSTASH(SvRV(right))): | |
964 | ""); | |
965 | if (amtp && amtp->fallback >= AMGfallYES) { | |
966 | DEBUG_o( deb(tmpstr) ); | |
967 | } else { | |
968 | die(tmpstr); | |
969 | } | |
970 | return NULL; | |
971 | } | |
972 | } | |
973 | } | |
974 | if (!notfound) { | |
975 | DEBUG_o( deb("Operation `%s': method for %s argument found in package %s%s\n", | |
976 | ((char**)AMG_names)[off], | |
977 | (lr? "right": "left"), | |
978 | HvNAME(stash), | |
979 | fl? ",\n\tassignment variant used": "") ); | |
980 | /* Since we use shallow copy, we need to dublicate the contents, | |
981 | probably we need also to use user-supplied version of coping? | |
982 | */ | |
983 | if (assign || method==inc_amg || method==dec_amg) RvDEEPCP(left); | |
984 | } | |
985 | { | |
986 | dSP; | |
987 | BINOP myop; | |
988 | SV* res; | |
989 | ||
990 | Zero(&myop, 1, BINOP); | |
991 | myop.op_last = (OP *) &myop; | |
992 | myop.op_next = Nullop; | |
993 | myop.op_flags = OPf_KNOW|OPf_STACKED; | |
994 | ||
995 | ENTER; | |
996 | SAVESPTR(op); | |
997 | op = (OP *) &myop; | |
998 | PUTBACK; | |
999 | pp_pushmark(); | |
1000 | ||
1001 | EXTEND(sp, notfound + 5); | |
1002 | PUSHs(lr>0? right: left); | |
1003 | PUSHs(lr>0? left: right); | |
1004 | PUSHs( assign ? &sv_undef : (lr>0? &sv_yes: &sv_no)); | |
1005 | if (notfound) { | |
1006 | PUSHs( sv_2mortal(newSVpv(((char**)AMG_names)[off],0)) ); | |
1007 | } | |
1008 | PUSHs((SV*)cv); | |
1009 | PUTBACK; | |
1010 | ||
1011 | if (op = pp_entersub()) | |
1012 | run(); | |
1013 | LEAVE; | |
1014 | SPAGAIN; | |
1015 | ||
1016 | res=POPs; | |
1017 | PUTBACK; | |
1018 | ||
1019 | if (notfound) { | |
1020 | /* sv_2mortal(res); */ | |
1021 | return NULL; | |
1022 | } | |
1023 | ||
1024 | if (postpr) { | |
1025 | int ans; | |
1026 | switch (method) { | |
1027 | case le_amg: | |
1028 | case sle_amg: | |
1029 | ans=SvIV(res)<=0; break; | |
1030 | case lt_amg: | |
1031 | case slt_amg: | |
1032 | ans=SvIV(res)<0; break; | |
1033 | case ge_amg: | |
1034 | case sge_amg: | |
1035 | ans=SvIV(res)>=0; break; | |
1036 | case gt_amg: | |
1037 | case sgt_amg: | |
1038 | ans=SvIV(res)>0; break; | |
1039 | case eq_amg: | |
1040 | case seq_amg: | |
1041 | ans=SvIV(res)==0; break; | |
1042 | case ne_amg: | |
1043 | case sne_amg: | |
1044 | ans=SvIV(res)!=0; break; | |
1045 | case inc_amg: | |
1046 | case dec_amg: | |
1047 | SvSetSV(left,res); return res; break; | |
1048 | } | |
1049 | return ans? &sv_yes: &sv_no; | |
1050 | } else { | |
1051 | return res; | |
1052 | } | |
1053 | } | |
1054 | } | |
1055 | #endif /* OVERLOAD */ |