Commit | Line | Data |
a0d0e21e |
1 | /* gv.c |
79072805 |
2 | * |
a0d0e21e |
3 | * Copyright (c) 1991-1994, Larry Wall |
79072805 |
4 | * |
5 | * You may distribute under the terms of either the GNU General Public |
6 | * License or the Artistic License, as specified in the README file. |
7 | * |
a0d0e21e |
8 | */ |
9 | |
10 | /* |
11 | * 'Mercy!' cried Gandalf. 'If the giving of information is to be the cure |
12 | * of your inquisitiveness, I shall spend all the rest of my days answering |
13 | * you. What more do you want to know?' |
14 | * 'The names of all the stars, and of all living things, and the whole |
15 | * history of Middle-earth and Over-heaven and of the Sundering Seas,' |
16 | * laughed Pippin. |
79072805 |
17 | */ |
18 | |
19 | #include "EXTERN.h" |
20 | #include "perl.h" |
21 | |
463ee0b2 |
22 | extern char rcsid[]; |
93a17b20 |
23 | |
79072805 |
24 | GV * |
25 | gv_AVadd(gv) |
26 | register GV *gv; |
27 | { |
a0d0e21e |
28 | if (!gv || SvTYPE((SV*)gv) != SVt_PVGV) |
29 | croak("Bad symbol for array"); |
79072805 |
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 |
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 |
43 | return gv; |
44 | } |
45 | |
46 | GV * |
a0d0e21e |
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 |
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 |
71 | return gv; |
72 | } |
73 | |
463ee0b2 |
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 |
89 | GvREFCNT(gv) = 1; |
90 | GvSV(gv) = NEWSV(72,0); |
91 | GvLINE(gv) = curcop->cop_line; |
8990e307 |
92 | GvFILEGV(gv) = curcop->cop_filegv; |
463ee0b2 |
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 |
97 | GvNAMELEN(gv) = len; |
98 | if (multi) |
99 | SvMULTI_on(gv); |
100 | } |
101 | |
a0d0e21e |
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 |
122 | HV* stash; |
123 | char* name; |
463ee0b2 |
124 | STRLEN len; |
a0d0e21e |
125 | I32 level; |
79072805 |
126 | { |
127 | AV* av; |
463ee0b2 |
128 | GV* topgv; |
79072805 |
129 | GV* gv; |
463ee0b2 |
130 | GV** gvp; |
a0d0e21e |
131 | HV* lastchance; |
132 | |
133 | if (!stash) |
134 | return 0; |
135 | if (level > 100) |
136 | croak("Recursive inheritance detected"); |
463ee0b2 |
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 |
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 |
161 | continue; |
162 | } |
a0d0e21e |
163 | gv = gv_fetchmeth(basestash, name, len, level + 1); |
463ee0b2 |
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 |
169 | } |
170 | } |
a0d0e21e |
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 |
182 | return 0; |
183 | } |
184 | |
185 | GV * |
463ee0b2 |
186 | gv_fetchmethod(stash, name) |
187 | HV* stash; |
188 | char* name; |
189 | { |
190 | register char *nend; |
a0d0e21e |
191 | char *nsplit = 0; |
192 | GV* gv; |
463ee0b2 |
193 | |
194 | for (nend = name; *nend; nend++) { |
a0d0e21e |
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 |
224 | } |
225 | } |
a0d0e21e |
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 |
247 | } |
248 | |
a0d0e21e |
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 |
264 | register char *name = nambeg; |
265 | register GV *gv = 0; |
79072805 |
266 | GV**gvp; |
79072805 |
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 |
274 | if ((*namend == '\'' && namend[1]) || |
275 | (*namend == ':' && namend[1] == ':')) |
276 | { |
463ee0b2 |
277 | if (!stash) |
278 | stash = defstash; |
a0d0e21e |
279 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
280 | return Nullgv; |
463ee0b2 |
281 | |
85e6fe83 |
282 | len = namend - name; |
283 | if (len > 0) { |
a0d0e21e |
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 |
291 | if (!gvp || *gvp == (GV*)&sv_undef) |
292 | return Nullgv; |
293 | gv = *gvp; |
85e6fe83 |
294 | |
463ee0b2 |
295 | if (SvTYPE(gv) == SVt_PVGV) |
296 | SvMULTI_on(gv); |
a0d0e21e |
297 | else if (!add) |
298 | return Nullgv; |
463ee0b2 |
299 | else |
300 | gv_init(gv, stash, nambeg, namend - nambeg, (add & 2)); |
85e6fe83 |
301 | |
463ee0b2 |
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 |
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 |
317 | len = namend - name; |
318 | if (!len) |
319 | len = 1; |
463ee0b2 |
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 |
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 |
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 |
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 |
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 |
385 | if (add) { |
386 | SvMULTI_on(gv); |
387 | gv_init_sv(gv, sv_type); |
388 | } |
79072805 |
389 | return gv; |
390 | } |
93a17b20 |
391 | |
392 | /* Adding a new symbol */ |
393 | |
a0d0e21e |
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 |
398 | |
399 | /* set up magic where warranted */ |
400 | switch (*name) { |
a0d0e21e |
401 | case 'A': |
402 | if (strEQ(name, "ARGV")) { |
403 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
404 | } |
405 | break; |
406 | |
ed6116ce |
407 | case 'a': |
408 | case 'b': |
409 | if (len == 1) |
410 | SvMULTI_on(gv); |
411 | break; |
a0d0e21e |
412 | case 'E': |
413 | if (strnEQ(name, "EXPORT", 6)) |
414 | SvMULTI_on(gv); |
415 | break; |
463ee0b2 |
416 | case 'I': |
417 | if (strEQ(name, "ISA")) { |
418 | AV* av = GvAVn(gv); |
8990e307 |
419 | SvMULTI_on(gv); |
a0d0e21e |
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 |
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 |
435 | } |
436 | break; |
a0d0e21e |
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 |
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 |
457 | av_extend(signalstack, 30); |
458 | av_fill(signalstack, 0); |
93a17b20 |
459 | } |
460 | break; |
461 | |
462 | case '&': |
463ee0b2 |
463 | if (len > 1) |
464 | break; |
93a17b20 |
465 | ampergv = gv; |
466 | sawampersand = TRUE; |
a0d0e21e |
467 | goto ro_magicalize; |
93a17b20 |
468 | |
469 | case '`': |
463ee0b2 |
470 | if (len > 1) |
471 | break; |
93a17b20 |
472 | leftgv = gv; |
473 | sawampersand = TRUE; |
a0d0e21e |
474 | goto ro_magicalize; |
93a17b20 |
475 | |
476 | case '\'': |
463ee0b2 |
477 | if (len > 1) |
478 | break; |
93a17b20 |
479 | rightgv = gv; |
480 | sawampersand = TRUE; |
a0d0e21e |
481 | goto ro_magicalize; |
93a17b20 |
482 | |
483 | case ':': |
463ee0b2 |
484 | if (len > 1) |
485 | break; |
93a17b20 |
486 | sv_setpv(GvSV(gv),chopset); |
487 | goto magicalize; |
488 | |
93a17b20 |
489 | case '#': |
a0d0e21e |
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 |
496 | case '?': |
497 | case '^': |
498 | case '~': |
499 | case '=': |
500 | case '-': |
501 | case '%': |
502 | case '.': |
93a17b20 |
503 | case '(': |
504 | case ')': |
505 | case '<': |
506 | case '>': |
507 | case ',': |
508 | case '\\': |
509 | case '/': |
93a17b20 |
510 | case '|': |
511 | case '\004': |
a0d0e21e |
512 | case '\010': |
93a17b20 |
513 | case '\t': |
514 | case '\020': |
515 | case '\024': |
516 | case '\027': |
517 | case '\006': |
463ee0b2 |
518 | if (len > 1) |
519 | break; |
520 | goto magicalize; |
521 | |
a0d0e21e |
522 | case '+': |
463ee0b2 |
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 |
532 | ro_magicalize: |
533 | SvREADONLY_on(GvSV(gv)); |
93a17b20 |
534 | magicalize: |
463ee0b2 |
535 | sv_magic(GvSV(gv), (SV*)gv, 0, name, len); |
93a17b20 |
536 | break; |
537 | |
538 | case '\014': |
463ee0b2 |
539 | if (len > 1) |
540 | break; |
93a17b20 |
541 | sv_setpv(GvSV(gv),"\f"); |
542 | formfeed = GvSV(gv); |
543 | break; |
544 | case ';': |
463ee0b2 |
545 | if (len > 1) |
546 | break; |
93a17b20 |
547 | sv_setpv(GvSV(gv),"\034"); |
548 | break; |
463ee0b2 |
549 | case ']': |
550 | if (len == 1) { |
93a17b20 |
551 | SV *sv; |
552 | sv = GvSV(gv); |
553 | sv_upgrade(sv, SVt_PVNV); |
a0d0e21e |
554 | sv_setpv(sv, patchlevel); |
93a17b20 |
555 | } |
556 | break; |
79072805 |
557 | } |
93a17b20 |
558 | return gv; |
79072805 |
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 |
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 |
589 | sv_catpvn(sv,GvNAME(egv),GvNAMELEN(egv)); |
590 | } |
591 | |
592 | IO * |
593 | newIO() |
594 | { |
595 | IO *io; |
8990e307 |
596 | GV *iogv; |
597 | |
598 | io = (IO*)NEWSV(0,0); |
a0d0e21e |
599 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 |
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 |
604 | return io; |
605 | } |
606 | |
607 | void |
463ee0b2 |
608 | gv_check(stash) |
609 | HV* stash; |
79072805 |
610 | { |
611 | register HE *entry; |
612 | register I32 i; |
613 | register GV *gv; |
463ee0b2 |
614 | HV *hv; |
a0d0e21e |
615 | GV *filegv; |
463ee0b2 |
616 | |
8990e307 |
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 |
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 |
628 | gv = (GV*)entry->hent_val; |
629 | if (SvMULTI(gv)) |
630 | continue; |
631 | curcop->cop_line = GvLINE(gv); |
a0d0e21e |
632 | filegv = GvFILEGV(gv); |
633 | curcop->cop_filegv = filegv; |
634 | if (filegv && SvMULTI(filegv)) /* Filename began with slash */ |
8990e307 |
635 | continue; |
a0d0e21e |
636 | warn("Identifier \"%s::%s\" used only once: possible typo", |
637 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 |
638 | } |
79072805 |
639 | } |
640 | } |
641 | } |
642 | |
643 | GV * |
a0d0e21e |
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 |
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 |
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 |
686 | if ((cv = gp->gp_cv) && !GvCVGEN(gv)) |
687 | SvREFCNT_dec(cv); |
79072805 |
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 |
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 */ |