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; |
748a9306 |
132 | CV* cv; |
a0d0e21e |
133 | |
134 | if (!stash) |
135 | return 0; |
136 | if (level > 100) |
137 | croak("Recursive inheritance detected"); |
463ee0b2 |
138 | |
139 | gvp = (GV**)hv_fetch(stash, name, len, TRUE); |
140 | |
141 | DEBUG_o( deb("Looking for method %s in package %s\n",name,HvNAME(stash)) ); |
142 | topgv = *gvp; |
143 | if (SvTYPE(topgv) != SVt_PVGV) |
144 | gv_init(topgv, stash, name, len, TRUE); |
145 | |
748a9306 |
146 | if (cv=GvCV(topgv)) { |
147 | if (GvCVGEN(topgv) >= sub_generation) |
148 | return topgv; /* valid cached inheritance */ |
149 | if (!GvCVGEN(topgv)) { /* not an inheritance cache */ |
16d20bd9 |
150 | return topgv; |
748a9306 |
151 | } |
152 | else { |
153 | /* stale cached entry, just junk it */ |
154 | GvCV(topgv) = cv = 0; |
155 | GvCVGEN(topgv) = 0; |
156 | } |
463ee0b2 |
157 | } |
748a9306 |
158 | /* if cv is still set, we have to free it if we find something to cache */ |
79072805 |
159 | |
160 | gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE); |
161 | if (gvp && (gv = *gvp) != (GV*)&sv_undef && (av = GvAV(gv))) { |
162 | SV** svp = AvARRAY(av); |
163 | I32 items = AvFILL(av) + 1; |
164 | while (items--) { |
79072805 |
165 | SV* sv = *svp++; |
a0d0e21e |
166 | HV* basestash = gv_stashsv(sv, FALSE); |
9bbf4081 |
167 | if (!basestash) { |
79072805 |
168 | if (dowarn) |
a0d0e21e |
169 | warn("Can't locate package %s for @%s::ISA", |
463ee0b2 |
170 | SvPVX(sv), HvNAME(stash)); |
79072805 |
171 | continue; |
172 | } |
a0d0e21e |
173 | gv = gv_fetchmeth(basestash, name, len, level + 1); |
463ee0b2 |
174 | if (gv) { |
748a9306 |
175 | if (cv) { /* junk old undef */ |
176 | assert(SvREFCNT(topgv) > 1); |
177 | SvREFCNT_dec(topgv); |
178 | SvREFCNT_dec(cv); |
179 | } |
463ee0b2 |
180 | GvCV(topgv) = GvCV(gv); /* cache the CV */ |
181 | GvCVGEN(topgv) = sub_generation; /* valid for now */ |
79072805 |
182 | return gv; |
463ee0b2 |
183 | } |
79072805 |
184 | } |
185 | } |
a0d0e21e |
186 | |
187 | if (!level) { |
188 | if (lastchance = gv_stashpv("UNIVERSAL", FALSE)) { |
189 | if (gv = gv_fetchmeth(lastchance, name, len, level + 1)) { |
748a9306 |
190 | if (cv) { /* junk old undef */ |
191 | assert(SvREFCNT(topgv) > 1); |
192 | SvREFCNT_dec(topgv); |
193 | SvREFCNT_dec(cv); |
194 | } |
a0d0e21e |
195 | GvCV(topgv) = GvCV(gv); /* cache the CV */ |
196 | GvCVGEN(topgv) = sub_generation; /* valid for now */ |
197 | return gv; |
198 | } |
199 | } |
200 | } |
201 | |
79072805 |
202 | return 0; |
203 | } |
204 | |
205 | GV * |
463ee0b2 |
206 | gv_fetchmethod(stash, name) |
207 | HV* stash; |
208 | char* name; |
209 | { |
210 | register char *nend; |
a0d0e21e |
211 | char *nsplit = 0; |
212 | GV* gv; |
463ee0b2 |
213 | |
214 | for (nend = name; *nend; nend++) { |
a0d0e21e |
215 | if (*nend == ':' || *nend == '\'') |
216 | nsplit = nend; |
217 | } |
218 | if (nsplit) { |
219 | char ch; |
220 | char *origname = name; |
221 | name = nsplit + 1; |
222 | ch = *nsplit; |
223 | if (*nsplit == ':') |
224 | --nsplit; |
225 | *nsplit = '\0'; |
226 | stash = gv_stashpv(origname,TRUE); |
227 | *nsplit = ch; |
228 | } |
229 | gv = gv_fetchmeth(stash, name, nend - name, 0); |
230 | if (!gv) { |
231 | CV* cv; |
232 | |
233 | if (strEQ(name,"import") || strEQ(name,"unimport")) |
234 | gv = &sv_yes; |
235 | else if (strNE(name, "AUTOLOAD")) { |
236 | gv = gv_fetchmeth(stash, "AUTOLOAD", 8, 0); |
237 | if (gv && (cv = GvCV(gv))) { /* One more chance... */ |
748a9306 |
238 | SV *tmpstr = sv_2mortal(newSVpv(HvNAME(stash),0)); |
a0d0e21e |
239 | sv_catpvn(tmpstr,"::", 2); |
240 | sv_catpvn(tmpstr, name, nend - name); |
241 | sv_setsv(GvSV(CvGV(cv)), tmpstr); |
242 | } |
463ee0b2 |
243 | } |
244 | } |
a0d0e21e |
245 | return gv; |
246 | } |
247 | |
248 | HV* |
249 | gv_stashpv(name,create) |
250 | char *name; |
251 | I32 create; |
252 | { |
253 | char tmpbuf[1234]; |
254 | HV *stash; |
255 | GV *tmpgv; |
256 | sprintf(tmpbuf,"%.*s::",1200,name); |
257 | tmpgv = gv_fetchpv(tmpbuf,create, SVt_PVHV); |
258 | if (!tmpgv) |
259 | return 0; |
260 | if (!GvHV(tmpgv)) |
261 | GvHV(tmpgv) = newHV(); |
262 | stash = GvHV(tmpgv); |
263 | if (!HvNAME(stash)) |
264 | HvNAME(stash) = savepv(name); |
265 | return stash; |
463ee0b2 |
266 | } |
267 | |
a0d0e21e |
268 | HV* |
269 | gv_stashsv(sv,create) |
270 | SV *sv; |
271 | I32 create; |
272 | { |
273 | return gv_stashpv(SvPV(sv,na), create); |
274 | } |
275 | |
276 | |
463ee0b2 |
277 | GV * |
a0d0e21e |
278 | gv_fetchpv(nambeg,add,sv_type) |
463ee0b2 |
279 | char *nambeg; |
79072805 |
280 | I32 add; |
a0d0e21e |
281 | I32 sv_type; |
79072805 |
282 | { |
463ee0b2 |
283 | register char *name = nambeg; |
284 | register GV *gv = 0; |
79072805 |
285 | GV**gvp; |
79072805 |
286 | I32 len; |
287 | register char *namend; |
463ee0b2 |
288 | HV *stash = 0; |
79072805 |
289 | bool global = FALSE; |
85e6fe83 |
290 | char *tmpbuf; |
79072805 |
291 | |
79072805 |
292 | for (namend = name; *namend; namend++) { |
463ee0b2 |
293 | if ((*namend == '\'' && namend[1]) || |
294 | (*namend == ':' && namend[1] == ':')) |
295 | { |
463ee0b2 |
296 | if (!stash) |
297 | stash = defstash; |
a0d0e21e |
298 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
299 | return Nullgv; |
463ee0b2 |
300 | |
85e6fe83 |
301 | len = namend - name; |
302 | if (len > 0) { |
a0d0e21e |
303 | New(601, tmpbuf, len+3, char); |
304 | Copy(name, tmpbuf, len, char); |
305 | tmpbuf[len++] = ':'; |
306 | tmpbuf[len++] = ':'; |
307 | tmpbuf[len] = '\0'; |
463ee0b2 |
308 | gvp = (GV**)hv_fetch(stash,tmpbuf,len,add); |
85e6fe83 |
309 | Safefree(tmpbuf); |
463ee0b2 |
310 | if (!gvp || *gvp == (GV*)&sv_undef) |
311 | return Nullgv; |
312 | gv = *gvp; |
85e6fe83 |
313 | |
463ee0b2 |
314 | if (SvTYPE(gv) == SVt_PVGV) |
315 | SvMULTI_on(gv); |
a0d0e21e |
316 | else if (!add) |
317 | return Nullgv; |
463ee0b2 |
318 | else |
319 | gv_init(gv, stash, nambeg, namend - nambeg, (add & 2)); |
85e6fe83 |
320 | |
463ee0b2 |
321 | if (!(stash = GvHV(gv))) |
322 | stash = GvHV(gv) = newHV(); |
85e6fe83 |
323 | |
463ee0b2 |
324 | if (!HvNAME(stash)) |
a0d0e21e |
325 | HvNAME(stash) = savepvn(nambeg, namend - nambeg); |
463ee0b2 |
326 | } |
327 | |
328 | if (*namend == ':') |
329 | namend++; |
330 | namend++; |
331 | name = namend; |
332 | if (!*name) |
a0d0e21e |
333 | return gv ? gv : *hv_fetch(defstash, "main::", 6, TRUE); |
79072805 |
334 | } |
79072805 |
335 | } |
a0d0e21e |
336 | len = namend - name; |
337 | if (!len) |
338 | len = 1; |
463ee0b2 |
339 | |
340 | /* No stash in name, so see how we can default */ |
341 | |
342 | if (!stash) { |
343 | if (isIDFIRST(*name)) { |
344 | if (isUPPER(*name)) { |
345 | if (*name > 'I') { |
346 | if (*name == 'S' && ( |
347 | strEQ(name, "SIG") || |
348 | strEQ(name, "STDIN") || |
349 | strEQ(name, "STDOUT") || |
350 | strEQ(name, "STDERR") )) |
351 | global = TRUE; |
352 | } |
353 | else if (*name > 'E') { |
354 | if (*name == 'I' && strEQ(name, "INC")) |
355 | global = TRUE; |
356 | } |
357 | else if (*name > 'A') { |
358 | if (*name == 'E' && strEQ(name, "ENV")) |
359 | global = TRUE; |
360 | } |
361 | else if (*name == 'A' && ( |
362 | strEQ(name, "ARGV") || |
363 | strEQ(name, "ARGVOUT") )) |
364 | global = TRUE; |
365 | } |
366 | else if (*name == '_' && !name[1]) |
367 | global = TRUE; |
368 | if (global) |
369 | stash = defstash; |
85e6fe83 |
370 | else if ((COP*)curcop == &compiling) { |
a0d0e21e |
371 | stash = curstash; |
748a9306 |
372 | if (add && (hints & HINT_STRICT_VARS) && |
373 | sv_type != SVt_PVCV && |
374 | sv_type != SVt_PVGV && |
375 | sv_type != SVt_PVIO) |
376 | { |
a0d0e21e |
377 | stash = 0; |
378 | } |
85e6fe83 |
379 | } |
463ee0b2 |
380 | else |
381 | stash = curcop->cop_stash; |
382 | } |
383 | else |
384 | stash = defstash; |
385 | } |
386 | |
387 | /* By this point we should have a stash and a name */ |
388 | |
a0d0e21e |
389 | if (!stash) { |
390 | if (add) { |
391 | warn("Global symbol \"%s\" requires explicit package name", name); |
392 | ++error_count; |
393 | stash = curstash ? curstash : defstash; /* avoid core dumps */ |
394 | } |
395 | else |
396 | return Nullgv; |
397 | } |
398 | |
399 | if (!SvREFCNT(stash)) /* symbol table under destruction */ |
400 | return Nullgv; |
401 | |
79072805 |
402 | gvp = (GV**)hv_fetch(stash,name,len,add); |
403 | if (!gvp || *gvp == (GV*)&sv_undef) |
404 | return Nullgv; |
405 | gv = *gvp; |
406 | if (SvTYPE(gv) == SVt_PVGV) { |
a0d0e21e |
407 | if (add) { |
408 | SvMULTI_on(gv); |
409 | gv_init_sv(gv, sv_type); |
410 | } |
79072805 |
411 | return gv; |
412 | } |
93a17b20 |
413 | |
414 | /* Adding a new symbol */ |
415 | |
a0d0e21e |
416 | if (add & 4) |
417 | warn("Had to create %s unexpectedly", nambeg); |
463ee0b2 |
418 | gv_init(gv, stash, name, len, add & 2); |
a0d0e21e |
419 | gv_init_sv(gv, sv_type); |
93a17b20 |
420 | |
421 | /* set up magic where warranted */ |
422 | switch (*name) { |
a0d0e21e |
423 | case 'A': |
424 | if (strEQ(name, "ARGV")) { |
425 | IoFLAGS(GvIOn(gv)) |= IOf_ARGV|IOf_START; |
426 | } |
427 | break; |
428 | |
ed6116ce |
429 | case 'a': |
430 | case 'b': |
431 | if (len == 1) |
432 | SvMULTI_on(gv); |
433 | break; |
a0d0e21e |
434 | case 'E': |
435 | if (strnEQ(name, "EXPORT", 6)) |
436 | SvMULTI_on(gv); |
437 | break; |
463ee0b2 |
438 | case 'I': |
439 | if (strEQ(name, "ISA")) { |
440 | AV* av = GvAVn(gv); |
8990e307 |
441 | SvMULTI_on(gv); |
a0d0e21e |
442 | sv_magic((SV*)av, (SV*)gv, 'I', Nullch, 0); |
443 | if (add & 2 && strEQ(nambeg,"AnyDBM_File::ISA") && AvFILL(av) == -1) |
85e6fe83 |
444 | { |
a0d0e21e |
445 | char *pname; |
446 | av_push(av, newSVpv(pname = "NDBM_File",0)); |
447 | gv_stashpv(pname, TRUE); |
448 | av_push(av, newSVpv(pname = "DB_File",0)); |
449 | gv_stashpv(pname, TRUE); |
450 | av_push(av, newSVpv(pname = "GDBM_File",0)); |
451 | gv_stashpv(pname, TRUE); |
452 | av_push(av, newSVpv(pname = "SDBM_File",0)); |
453 | gv_stashpv(pname, TRUE); |
454 | av_push(av, newSVpv(pname = "ODBM_File",0)); |
455 | gv_stashpv(pname, TRUE); |
85e6fe83 |
456 | } |
463ee0b2 |
457 | } |
458 | break; |
a0d0e21e |
459 | #ifdef OVERLOAD |
460 | case 'O': |
461 | if (strEQ(name, "OVERLOAD")) { |
462 | HV* hv = GvHVn(gv); |
463 | SvMULTI_on(gv); |
464 | sv_magic((SV*)hv, (SV*)gv, 'A', 0, 0); |
465 | } |
466 | break; |
467 | #endif /* OVERLOAD */ |
93a17b20 |
468 | case 'S': |
469 | if (strEQ(name, "SIG")) { |
470 | HV *hv; |
471 | siggv = gv; |
472 | SvMULTI_on(siggv); |
473 | hv = GvHVn(siggv); |
474 | hv_magic(hv, siggv, 'S'); |
475 | |
476 | /* initialize signal stack */ |
477 | signalstack = newAV(); |
93a17b20 |
478 | AvREAL_off(signalstack); |
a0d0e21e |
479 | av_extend(signalstack, 30); |
480 | av_fill(signalstack, 0); |
93a17b20 |
481 | } |
482 | break; |
483 | |
484 | case '&': |
463ee0b2 |
485 | if (len > 1) |
486 | break; |
93a17b20 |
487 | ampergv = gv; |
488 | sawampersand = TRUE; |
a0d0e21e |
489 | goto ro_magicalize; |
93a17b20 |
490 | |
491 | case '`': |
463ee0b2 |
492 | if (len > 1) |
493 | break; |
93a17b20 |
494 | leftgv = gv; |
495 | sawampersand = TRUE; |
a0d0e21e |
496 | goto ro_magicalize; |
93a17b20 |
497 | |
498 | case '\'': |
463ee0b2 |
499 | if (len > 1) |
500 | break; |
93a17b20 |
501 | rightgv = gv; |
502 | sawampersand = TRUE; |
a0d0e21e |
503 | goto ro_magicalize; |
93a17b20 |
504 | |
505 | case ':': |
463ee0b2 |
506 | if (len > 1) |
507 | break; |
93a17b20 |
508 | sv_setpv(GvSV(gv),chopset); |
509 | goto magicalize; |
510 | |
93a17b20 |
511 | case '#': |
a0d0e21e |
512 | case '*': |
513 | if (dowarn && len == 1 && sv_type == SVt_PV) |
514 | warn("Use of $%s is deprecated", name); |
515 | /* FALL THROUGH */ |
516 | case '[': |
517 | case '!': |
93a17b20 |
518 | case '?': |
519 | case '^': |
520 | case '~': |
521 | case '=': |
522 | case '-': |
523 | case '%': |
524 | case '.': |
93a17b20 |
525 | case '(': |
526 | case ')': |
527 | case '<': |
528 | case '>': |
529 | case ',': |
530 | case '\\': |
531 | case '/': |
93a17b20 |
532 | case '|': |
748a9306 |
533 | case '\001': |
93a17b20 |
534 | case '\004': |
748a9306 |
535 | case '\006': |
a0d0e21e |
536 | case '\010': |
93a17b20 |
537 | case '\t': |
538 | case '\020': |
539 | case '\024': |
540 | case '\027': |
463ee0b2 |
541 | if (len > 1) |
542 | break; |
543 | goto magicalize; |
544 | |
a0d0e21e |
545 | case '+': |
463ee0b2 |
546 | case '1': |
547 | case '2': |
548 | case '3': |
549 | case '4': |
550 | case '5': |
551 | case '6': |
552 | case '7': |
553 | case '8': |
554 | case '9': |
a0d0e21e |
555 | ro_magicalize: |
556 | SvREADONLY_on(GvSV(gv)); |
93a17b20 |
557 | magicalize: |
463ee0b2 |
558 | sv_magic(GvSV(gv), (SV*)gv, 0, name, len); |
93a17b20 |
559 | break; |
560 | |
561 | case '\014': |
463ee0b2 |
562 | if (len > 1) |
563 | break; |
93a17b20 |
564 | sv_setpv(GvSV(gv),"\f"); |
565 | formfeed = GvSV(gv); |
566 | break; |
567 | case ';': |
463ee0b2 |
568 | if (len > 1) |
569 | break; |
93a17b20 |
570 | sv_setpv(GvSV(gv),"\034"); |
571 | break; |
463ee0b2 |
572 | case ']': |
573 | if (len == 1) { |
93a17b20 |
574 | SV *sv; |
575 | sv = GvSV(gv); |
576 | sv_upgrade(sv, SVt_PVNV); |
a0d0e21e |
577 | sv_setpv(sv, patchlevel); |
93a17b20 |
578 | } |
579 | break; |
79072805 |
580 | } |
93a17b20 |
581 | return gv; |
79072805 |
582 | } |
583 | |
584 | void |
585 | gv_fullname(sv,gv) |
586 | SV *sv; |
587 | GV *gv; |
588 | { |
589 | HV *hv = GvSTASH(gv); |
590 | |
591 | if (!hv) |
592 | return; |
593 | sv_setpv(sv, sv == (SV*)gv ? "*" : ""); |
594 | sv_catpv(sv,HvNAME(hv)); |
463ee0b2 |
595 | sv_catpvn(sv,"::", 2); |
79072805 |
596 | sv_catpvn(sv,GvNAME(gv),GvNAMELEN(gv)); |
597 | } |
598 | |
599 | void |
600 | gv_efullname(sv,gv) |
601 | SV *sv; |
602 | GV *gv; |
603 | { |
604 | GV* egv = GvEGV(gv); |
748a9306 |
605 | HV *hv; |
606 | |
607 | if (!egv) |
608 | egv = gv; |
609 | hv = GvSTASH(egv); |
79072805 |
610 | if (!hv) |
611 | return; |
748a9306 |
612 | |
79072805 |
613 | sv_setpv(sv, sv == (SV*)gv ? "*" : ""); |
614 | sv_catpv(sv,HvNAME(hv)); |
463ee0b2 |
615 | sv_catpvn(sv,"::", 2); |
79072805 |
616 | sv_catpvn(sv,GvNAME(egv),GvNAMELEN(egv)); |
617 | } |
618 | |
619 | IO * |
620 | newIO() |
621 | { |
622 | IO *io; |
8990e307 |
623 | GV *iogv; |
624 | |
625 | io = (IO*)NEWSV(0,0); |
a0d0e21e |
626 | sv_upgrade((SV *)io,SVt_PVIO); |
8990e307 |
627 | SvREFCNT(io) = 1; |
628 | SvOBJECT_on(io); |
85e6fe83 |
629 | iogv = gv_fetchpv("FileHandle::", TRUE, SVt_PVIO); |
8990e307 |
630 | SvSTASH(io) = (HV*)SvREFCNT_inc(GvHV(iogv)); |
79072805 |
631 | return io; |
632 | } |
633 | |
634 | void |
463ee0b2 |
635 | gv_check(stash) |
636 | HV* stash; |
79072805 |
637 | { |
638 | register HE *entry; |
639 | register I32 i; |
640 | register GV *gv; |
463ee0b2 |
641 | HV *hv; |
a0d0e21e |
642 | GV *filegv; |
463ee0b2 |
643 | |
8990e307 |
644 | if (!HvARRAY(stash)) |
645 | return; |
a0d0e21e |
646 | for (i = 0; i <= (I32) HvMAX(stash); i++) { |
463ee0b2 |
647 | for (entry = HvARRAY(stash)[i]; entry; entry = entry->hent_next) { |
a0d0e21e |
648 | if (entry->hent_key[entry->hent_klen-1] == ':' && |
649 | (gv = (GV*)entry->hent_val) && (hv = GvHV(gv)) && HvNAME(hv)) |
650 | { |
651 | if (hv != defstash) |
652 | gv_check(hv); /* nested package */ |
653 | } |
654 | else if (isALPHA(*entry->hent_key)) { |
463ee0b2 |
655 | gv = (GV*)entry->hent_val; |
656 | if (SvMULTI(gv)) |
657 | continue; |
658 | curcop->cop_line = GvLINE(gv); |
a0d0e21e |
659 | filegv = GvFILEGV(gv); |
660 | curcop->cop_filegv = filegv; |
661 | if (filegv && SvMULTI(filegv)) /* Filename began with slash */ |
8990e307 |
662 | continue; |
a0d0e21e |
663 | warn("Identifier \"%s::%s\" used only once: possible typo", |
664 | HvNAME(stash), GvNAME(gv)); |
463ee0b2 |
665 | } |
79072805 |
666 | } |
667 | } |
668 | } |
669 | |
670 | GV * |
a0d0e21e |
671 | newGVgen(pack) |
672 | char *pack; |
79072805 |
673 | { |
a0d0e21e |
674 | (void)sprintf(tokenbuf,"%s::_GEN_%ld",pack,(long)gensym++); |
85e6fe83 |
675 | return gv_fetchpv(tokenbuf,TRUE, SVt_PVGV); |
79072805 |
676 | } |
677 | |
678 | /* hopefully this is only called on local symbol table entries */ |
679 | |
680 | GP* |
681 | gp_ref(gp) |
682 | GP* gp; |
683 | { |
684 | gp->gp_refcnt++; |
685 | return gp; |
686 | |
687 | } |
688 | |
689 | void |
690 | gp_free(gv) |
691 | GV* gv; |
692 | { |
693 | IO *io; |
694 | CV *cv; |
695 | GP* gp; |
696 | |
697 | if (!gv || !(gp = GvGP(gv))) |
698 | return; |
699 | if (gp->gp_refcnt == 0) { |
700 | warn("Attempt to free unreferenced glob pointers"); |
701 | return; |
702 | } |
748a9306 |
703 | if (--gp->gp_refcnt > 0) { |
704 | if (gp->gp_egv == gv) |
705 | gp->gp_egv = 0; |
79072805 |
706 | return; |
748a9306 |
707 | } |
79072805 |
708 | |
8990e307 |
709 | SvREFCNT_dec(gp->gp_sv); |
710 | SvREFCNT_dec(gp->gp_av); |
711 | SvREFCNT_dec(gp->gp_hv); |
712 | if ((io = gp->gp_io) && SvTYPE(io) != SVTYPEMASK) { |
79072805 |
713 | do_close(gv,FALSE); |
8990e307 |
714 | SvREFCNT_dec(io); |
79072805 |
715 | } |
8990e307 |
716 | if ((cv = gp->gp_cv) && !GvCVGEN(gv)) |
717 | SvREFCNT_dec(cv); |
748a9306 |
718 | SvREFCNT_dec(gp->gp_form); |
719 | |
79072805 |
720 | Safefree(gp); |
721 | GvGP(gv) = 0; |
722 | } |
723 | |
724 | #if defined(CRIPPLED_CC) && (defined(iAPX286) || defined(M_I286) || defined(I80286)) |
725 | #define MICROPORT |
726 | #endif |
727 | |
728 | #ifdef MICROPORT /* Microport 2.4 hack */ |
729 | AV *GvAVn(gv) |
730 | register GV *gv; |
731 | { |
732 | if (GvGP(gv)->gp_av) |
733 | return GvGP(gv)->gp_av; |
734 | else |
735 | return GvGP(gv_AVadd(gv))->gp_av; |
736 | } |
737 | |
738 | HV *GvHVn(gv) |
739 | register GV *gv; |
740 | { |
741 | if (GvGP(gv)->gp_hv) |
742 | return GvGP(gv)->gp_hv; |
743 | else |
744 | return GvGP(gv_HVadd(gv))->gp_hv; |
745 | } |
746 | #endif /* Microport 2.4 hack */ |
a0d0e21e |
747 | |
748 | #ifdef OVERLOAD |
749 | /* Updates and caches the CV's */ |
750 | |
751 | bool |
752 | Gv_AMupdate(stash) |
753 | HV* stash; |
754 | { |
755 | GV** gvp; |
756 | HV* hv; |
757 | GV* gv; |
758 | CV* cv; |
759 | MAGIC* mg=mg_find((SV*)stash,'c'); |
748a9306 |
760 | AMT *amtp=mg ? (AMT*)mg->mg_ptr: NULL; |
a0d0e21e |
761 | |
762 | if (mg && (amtp=((AMT*)(mg->mg_ptr)))->was_ok_am == amagic_generation && |
763 | amtp->was_ok_sub == sub_generation) |
764 | return HV_AMAGIC(stash)? TRUE: FALSE; |
765 | gvp=(GV**)hv_fetch(stash,"OVERLOAD",8,FALSE); |
748a9306 |
766 | if (amtp && amtp->table) { |
767 | int i; |
768 | for (i=1;i<NofAMmeth*2;i++) { |
769 | if (amtp->table[i]) { |
770 | SvREFCNT_dec(amtp->table[i]); |
771 | } |
772 | } |
773 | } |
a0d0e21e |
774 | sv_unmagic((SV*)stash, 'c'); |
775 | |
776 | DEBUG_o( deb("Recalcing overload magic in package %s\n",HvNAME(stash)) ); |
777 | |
778 | if (gvp && ((gv = *gvp) != (GV*)&sv_undef && (hv = GvHV(gv)))) { |
779 | int filled=0; |
780 | int i; |
781 | char *cp; |
782 | AMT amt; |
783 | SV* sv; |
784 | SV** svp; |
785 | |
786 | /* if (*(svp)==(SV*)amagic_generation && *(svp+1)==(SV*)sub_generation) { |
787 | DEBUG_o( deb("Overload magic in package %s up-to-date\n",HvNAME(stash)) |
788 | ); |
789 | return HV_AMAGIC(stash)? TRUE: FALSE; |
790 | }*/ |
791 | |
792 | amt.was_ok_am=amagic_generation; |
793 | amt.was_ok_sub=sub_generation; |
794 | amt.fallback=AMGfallNO; |
795 | |
796 | /* Work with "fallback" key, which we assume to be first in AMG_names */ |
797 | |
798 | if ((cp=((char**)(*AMG_names))[0]) && |
799 | (svp=(SV**)hv_fetch(hv,cp,strlen(cp),FALSE)) && (sv = *svp)) { |
800 | if (SvTRUE(sv)) amt.fallback=AMGfallYES; |
801 | else if (SvOK(sv)) amt.fallback=AMGfallNEVER; |
802 | } |
803 | |
804 | for (i=1;i<NofAMmeth*2;i++) { |
805 | cv=0; |
806 | |
807 | if ( (cp=((char**)(*AMG_names))[i]) ) { |
808 | svp=(SV**)hv_fetch(hv,cp,strlen(cp),FALSE); |
809 | if (svp && ((sv = *svp) != (GV*)&sv_undef)) { |
810 | switch (SvTYPE(sv)) { |
811 | default: |
812 | if (!SvROK(sv)) { |
813 | if (!SvOK(sv)) break; |
748a9306 |
814 | gv = gv_fetchmethod(stash, SvPV(sv, na)); |
a0d0e21e |
815 | if (gv) cv = GvCV(gv); |
816 | break; |
817 | } |
818 | cv = (CV*)SvRV(sv); |
819 | if (SvTYPE(cv) == SVt_PVCV) |
820 | break; |
821 | /* FALL THROUGH */ |
822 | case SVt_PVHV: |
823 | case SVt_PVAV: |
824 | die("Not a subroutine reference in %%OVERLOAD"); |
825 | return FALSE; |
826 | case SVt_PVCV: |
827 | cv = (CV*)sv; |
828 | break; |
829 | case SVt_PVGV: |
830 | if (!(cv = GvCV((GV*)sv))) |
831 | cv = sv_2cv(sv, &stash, &gv, TRUE); |
832 | break; |
833 | } |
834 | if (cv) filled=1; |
835 | else { |
748a9306 |
836 | die("Method for operation %s not found in package %.200s during blessing\n", |
a0d0e21e |
837 | cp,HvNAME(stash)); |
838 | return FALSE; |
839 | } |
840 | } |
841 | } |
748a9306 |
842 | amt.table[i]=(CV*)SvREFCNT_inc(cv); |
a0d0e21e |
843 | } |
844 | sv_magic((SV*)stash, 0, 'c', (char*)&amt, sizeof(amt)); |
845 | if (filled) { |
846 | /* HV_badAMAGIC_off(stash);*/ |
847 | HV_AMAGIC_on(stash); |
848 | return TRUE; |
849 | } |
850 | } |
851 | /*HV_badAMAGIC_off(stash);*/ |
852 | HV_AMAGIC_off(stash); |
853 | return FALSE; |
854 | } |
855 | |
856 | /* During call to this subroutine stack can be reallocated. It is |
857 | * advised to call SPAGAIN macro in your code after call */ |
858 | |
859 | SV* |
860 | amagic_call(left,right,method,flags) |
861 | SV* left; |
862 | SV* right; |
863 | int method; |
864 | int flags; |
865 | { |
866 | MAGIC *mg; |
867 | CV *cv; |
868 | CV **cvp=NULL, **ocvp=NULL; |
869 | AMT *amtp, *oamtp; |
870 | int fl=0, off, off1, lr=0, assign=AMGf_assign & flags, notfound=0; |
748a9306 |
871 | int postpr=0, inc_dec_ass=0, assignshift=assign?1:0; |
a0d0e21e |
872 | HV* stash; |
873 | if (!(AMGf_noleft & flags) && SvAMAGIC(left) |
874 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(left))),'c')) |
875 | && (ocvp = cvp = ((oamtp=amtp=(AMT*)mg->mg_ptr)->table)) |
748a9306 |
876 | && ((cv = cvp[off=method+assignshift]) |
877 | || (assign && amtp->fallback > AMGfallNEVER && /* fallback to |
878 | * usual method */ |
879 | (fl = 1, cv = cvp[off=method])))) { |
a0d0e21e |
880 | lr = -1; /* Call method for left argument */ |
881 | } else { |
882 | if (cvp && amtp->fallback > AMGfallNEVER && flags & AMGf_unary) { |
883 | int logic; |
884 | |
885 | /* look for substituted methods */ |
886 | switch (method) { |
887 | case inc_amg: |
748a9306 |
888 | if (((cv = cvp[off=add_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e |
889 | || ((cv = cvp[off=add_amg]) && (postpr=1))) { |
890 | right = &sv_yes; lr = -1; assign = 1; |
891 | } |
892 | break; |
893 | case dec_amg: |
748a9306 |
894 | if (((cv = cvp[off=subtr_ass_amg]) && (inc_dec_ass=1)) |
a0d0e21e |
895 | || ((cv = cvp[off=subtr_amg]) && (postpr=1))) { |
896 | right = &sv_yes; lr = -1; assign = 1; |
897 | } |
898 | break; |
899 | case bool__amg: |
900 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=string_amg])); |
901 | break; |
902 | case numer_amg: |
903 | (void)((cv = cvp[off=string_amg]) || (cv = cvp[off=bool__amg])); |
904 | break; |
905 | case string_amg: |
906 | (void)((cv = cvp[off=numer_amg]) || (cv = cvp[off=bool__amg])); |
907 | break; |
748a9306 |
908 | case copy_amg: |
909 | { |
910 | SV* ref=SvRV(left); |
911 | if (!SvROK(ref) && SvTYPE(ref) <= SVt_PVMG) { /* Just to be |
912 | * extra |
913 | * causious, |
914 | * maybe in some |
915 | * additional |
916 | * cases sv_setsv |
917 | * is safe too */ |
918 | SV* newref = newSVsv(ref); |
919 | SvOBJECT_on(newref); |
920 | SvSTASH(newref) = (HV*)SvREFCNT_inc(SvSTASH(ref)); |
921 | return newref; |
922 | } |
923 | } |
924 | break; |
a0d0e21e |
925 | case abs_amg: |
748a9306 |
926 | if ((cvp[off1=lt_amg] || cvp[off1=ncmp_amg]) |
a0d0e21e |
927 | && ((cv = cvp[off=neg_amg]) || (cv = cvp[off=subtr_amg]))) { |
748a9306 |
928 | SV* nullsv=sv_2mortal(newSViv(0)); |
a0d0e21e |
929 | if (off1==lt_amg) { |
748a9306 |
930 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
931 | lt_amg,AMGf_noright); |
932 | logic = SvTRUE(lessp); |
933 | } else { |
748a9306 |
934 | SV* lessp = amagic_call(left,nullsv, |
a0d0e21e |
935 | ncmp_amg,AMGf_noright); |
936 | logic = (SvNV(lessp) < 0); |
937 | } |
938 | if (logic) { |
939 | if (off==subtr_amg) { |
940 | right = left; |
748a9306 |
941 | left = nullsv; |
a0d0e21e |
942 | lr = 1; |
943 | } |
944 | } else { |
945 | return left; |
946 | } |
947 | } |
948 | break; |
949 | case neg_amg: |
950 | if (cv = cvp[off=subtr_amg]) { |
951 | right = left; |
952 | left = sv_2mortal(newSViv(0)); |
953 | lr = 1; |
954 | } |
955 | break; |
956 | default: |
957 | goto not_found; |
958 | } |
959 | if (!cv) goto not_found; |
960 | } else if (!(AMGf_noright & flags) && SvAMAGIC(right) |
961 | && (mg = mg_find((SV*)(stash=SvSTASH(SvRV(right))),'c')) |
962 | && (cvp = ((amtp=(AMT*)mg->mg_ptr)->table)) |
963 | && (cv = cvp[off=method])) { /* Method for right |
964 | * argument found */ |
965 | lr=1; |
748a9306 |
966 | } else if (((ocvp && oamtp->fallback > AMGfallNEVER |
967 | && (cvp=ocvp) && (lr=-1)) |
a0d0e21e |
968 | || (cvp && amtp->fallback > AMGfallNEVER && (lr=1))) |
969 | && !(flags & AMGf_unary)) { |
970 | /* We look for substitution for |
971 | * comparison operations and |
972 | * concatendation */ |
973 | if (method==concat_amg || method==concat_ass_amg |
974 | || method==repeat_amg || method==repeat_ass_amg) { |
975 | return NULL; /* Delegate operation to string conversion */ |
976 | } |
977 | off = -1; |
978 | switch (method) { |
979 | case lt_amg: |
980 | case le_amg: |
981 | case gt_amg: |
982 | case ge_amg: |
983 | case eq_amg: |
984 | case ne_amg: |
985 | postpr = 1; off=ncmp_amg; break; |
986 | case slt_amg: |
987 | case sle_amg: |
988 | case sgt_amg: |
989 | case sge_amg: |
990 | case seq_amg: |
991 | case sne_amg: |
992 | postpr = 1; off=scmp_amg; break; |
993 | } |
994 | if (off != -1) cv = cvp[off]; |
995 | if (!cv) { |
996 | goto not_found; |
997 | } |
998 | } else { |
999 | not_found: /* No method found, either report or die */ |
1000 | if (ocvp && (cv=ocvp[nomethod_amg])) { /* Call report method */ |
1001 | notfound = 1; lr = -1; |
1002 | } else if (cvp && (cv=cvp[nomethod_amg])) { |
1003 | notfound = 1; lr = 1; |
1004 | } else { |
1005 | char tmpstr[512]; |
748a9306 |
1006 | if (off==-1) off=method; |
1007 | sprintf(tmpstr,"Operation `%s': no method found,\n\tleft argument %s%.200s,\n\tright argument %s%.200s", |
a0d0e21e |
1008 | ((char**)AMG_names)[off], |
1009 | SvAMAGIC(left)? |
1010 | "in overloaded package ": |
1011 | "has no overloaded magic", |
1012 | SvAMAGIC(left)? |
1013 | HvNAME(SvSTASH(SvRV(left))): |
1014 | "", |
1015 | SvAMAGIC(right)? |
1016 | "in overloaded package ": |
1017 | "has no overloaded magic", |
1018 | SvAMAGIC(right)? |
1019 | HvNAME(SvSTASH(SvRV(right))): |
1020 | ""); |
1021 | if (amtp && amtp->fallback >= AMGfallYES) { |
1022 | DEBUG_o( deb(tmpstr) ); |
1023 | } else { |
1024 | die(tmpstr); |
1025 | } |
1026 | return NULL; |
1027 | } |
1028 | } |
1029 | } |
1030 | if (!notfound) { |
748a9306 |
1031 | DEBUG_o( deb("Overloaded operator `%s'%s%s%s:\n\tmethod%s found%s in package %.200s%s\n", |
a0d0e21e |
1032 | ((char**)AMG_names)[off], |
748a9306 |
1033 | method+assignshift==off? "" : |
1034 | " (initially `", |
1035 | method+assignshift==off? "" : |
1036 | ((char**)AMG_names)[method+assignshift], |
1037 | method+assignshift==off? "" : "')", |
1038 | flags & AMGf_unary? "" : |
1039 | lr==1 ? " for right argument": " for left argument", |
1040 | flags & AMGf_unary? " for argument" : "", |
a0d0e21e |
1041 | HvNAME(stash), |
1042 | fl? ",\n\tassignment variant used": "") ); |
748a9306 |
1043 | /* Since we use shallow copy during assignment, we need |
1044 | * to dublicate the contents, probably calling user-supplied |
1045 | * version of copy operator |
1046 | */ |
1047 | if ((method+assignshift==off |
1048 | && (assign || method==inc_amg || method==dec_amg)) |
1049 | || inc_dec_ass) RvDEEPCP(left); |
a0d0e21e |
1050 | } |
1051 | { |
1052 | dSP; |
1053 | BINOP myop; |
1054 | SV* res; |
1055 | |
1056 | Zero(&myop, 1, BINOP); |
1057 | myop.op_last = (OP *) &myop; |
1058 | myop.op_next = Nullop; |
1059 | myop.op_flags = OPf_KNOW|OPf_STACKED; |
1060 | |
1061 | ENTER; |
1062 | SAVESPTR(op); |
1063 | op = (OP *) &myop; |
1064 | PUTBACK; |
1065 | pp_pushmark(); |
1066 | |
1067 | EXTEND(sp, notfound + 5); |
1068 | PUSHs(lr>0? right: left); |
1069 | PUSHs(lr>0? left: right); |
1070 | PUSHs( assign ? &sv_undef : (lr>0? &sv_yes: &sv_no)); |
1071 | if (notfound) { |
1072 | PUSHs( sv_2mortal(newSVpv(((char**)AMG_names)[off],0)) ); |
1073 | } |
1074 | PUSHs((SV*)cv); |
1075 | PUTBACK; |
1076 | |
1077 | if (op = pp_entersub()) |
1078 | run(); |
1079 | LEAVE; |
1080 | SPAGAIN; |
1081 | |
1082 | res=POPs; |
1083 | PUTBACK; |
1084 | |
1085 | if (notfound) { |
1086 | /* sv_2mortal(res); */ |
1087 | return NULL; |
1088 | } |
1089 | |
1090 | if (postpr) { |
1091 | int ans; |
1092 | switch (method) { |
1093 | case le_amg: |
1094 | case sle_amg: |
1095 | ans=SvIV(res)<=0; break; |
1096 | case lt_amg: |
1097 | case slt_amg: |
1098 | ans=SvIV(res)<0; break; |
1099 | case ge_amg: |
1100 | case sge_amg: |
1101 | ans=SvIV(res)>=0; break; |
1102 | case gt_amg: |
1103 | case sgt_amg: |
1104 | ans=SvIV(res)>0; break; |
1105 | case eq_amg: |
1106 | case seq_amg: |
1107 | ans=SvIV(res)==0; break; |
1108 | case ne_amg: |
1109 | case sne_amg: |
1110 | ans=SvIV(res)!=0; break; |
1111 | case inc_amg: |
1112 | case dec_amg: |
1113 | SvSetSV(left,res); return res; break; |
1114 | } |
1115 | return ans? &sv_yes: &sv_no; |
748a9306 |
1116 | } else if (method==copy_amg) { |
1117 | if (!SvROK(res)) { |
1118 | die("Copy method did not return a reference"); |
1119 | } |
1120 | return SvREFCNT_inc(SvRV(res)); |
a0d0e21e |
1121 | } else { |
1122 | return res; |
1123 | } |
1124 | } |
1125 | } |
1126 | #endif /* OVERLOAD */ |