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