Commit | Line | Data |
d6376244 |
1 | /* universal.c |
2 | * |
4bb101f2 |
3 | * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
4 | * by Larry Wall and others |
d6376244 |
5 | * |
6 | * You may distribute under the terms of either the GNU General Public |
7 | * License or the Artistic License, as specified in the README file. |
8 | * |
9 | */ |
10 | |
d31a8517 |
11 | /* |
12 | * "The roots of those mountains must be roots indeed; there must be |
13 | * great secrets buried there which have not been discovered since the |
14 | * beginning." --Gandalf, relating Gollum's story |
15 | */ |
16 | |
6d4a7be2 |
17 | #include "EXTERN.h" |
864dbfa3 |
18 | #define PERL_IN_UNIVERSAL_C |
6d4a7be2 |
19 | #include "perl.h" |
6d4a7be2 |
20 | |
39f7a870 |
21 | #ifdef USE_PERLIO |
22 | #include "perliol.h" /* For the PERLIO_F_XXX */ |
23 | #endif |
24 | |
6d4a7be2 |
25 | /* |
26 | * Contributed by Graham Barr <Graham.Barr@tiuk.ti.com> |
27 | * The main guts of traverse_isa was actually copied from gv_fetchmeth |
28 | */ |
29 | |
76e3520e |
30 | STATIC SV * |
301daebc |
31 | S_isa_lookup(pTHX_ HV *stash, const char *name, HV* name_stash, |
32 | int len, int level) |
6d4a7be2 |
33 | { |
34 | AV* av; |
35 | GV* gv; |
36 | GV** gvp; |
37 | HV* hv = Nullhv; |
46e4b22b |
38 | SV* subgen = Nullsv; |
6d4a7be2 |
39 | |
301daebc |
40 | /* A stash/class can go by many names (ie. User == main::User), so |
41 | we compare the stash itself just in case */ |
42 | if (name_stash && (stash == name_stash)) |
43 | return &PL_sv_yes; |
6d4a7be2 |
44 | |
46e4b22b |
45 | if (strEQ(HvNAME(stash), name)) |
3280af22 |
46 | return &PL_sv_yes; |
6d4a7be2 |
47 | |
48 | if (level > 100) |
46e4b22b |
49 | Perl_croak(aTHX_ "Recursive inheritance detected in package '%s'", |
50 | HvNAME(stash)); |
6d4a7be2 |
51 | |
52 | gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, FALSE); |
53 | |
46e4b22b |
54 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (subgen = GvSV(gv)) |
55 | && (hv = GvHV(gv))) |
56 | { |
eb160463 |
57 | if (SvIV(subgen) == (IV)PL_sub_generation) { |
46e4b22b |
58 | SV* sv; |
59 | SV** svp = (SV**)hv_fetch(hv, name, len, FALSE); |
60 | if (svp && (sv = *svp) != (SV*)&PL_sv_undef) { |
61 | DEBUG_o( Perl_deb(aTHX_ "Using cached ISA %s for package %s\n", |
62 | name, HvNAME(stash)) ); |
63 | return sv; |
64 | } |
65 | } |
66 | else { |
67 | DEBUG_o( Perl_deb(aTHX_ "ISA Cache in package %s is stale\n", |
68 | HvNAME(stash)) ); |
69 | hv_clear(hv); |
70 | sv_setiv(subgen, PL_sub_generation); |
71 | } |
6d4a7be2 |
72 | } |
73 | |
74 | gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE); |
46e4b22b |
75 | |
3280af22 |
76 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
46e4b22b |
77 | if (!hv || !subgen) { |
6d4a7be2 |
78 | gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, TRUE); |
79 | |
80 | gv = *gvp; |
81 | |
82 | if (SvTYPE(gv) != SVt_PVGV) |
83 | gv_init(gv, stash, "::ISA::CACHE::", 14, TRUE); |
84 | |
46e4b22b |
85 | if (!hv) |
86 | hv = GvHVn(gv); |
87 | if (!subgen) { |
88 | subgen = newSViv(PL_sub_generation); |
89 | GvSV(gv) = subgen; |
90 | } |
6d4a7be2 |
91 | } |
46e4b22b |
92 | if (hv) { |
6d4a7be2 |
93 | SV** svp = AvARRAY(av); |
93965878 |
94 | /* NOTE: No support for tied ISA */ |
95 | I32 items = AvFILLp(av) + 1; |
6d4a7be2 |
96 | while (items--) { |
97 | SV* sv = *svp++; |
98 | HV* basestash = gv_stashsv(sv, FALSE); |
99 | if (!basestash) { |
599cee73 |
100 | if (ckWARN(WARN_MISC)) |
9014280d |
101 | Perl_warner(aTHX_ packWARN(WARN_SYNTAX), |
35c1215d |
102 | "Can't locate package %"SVf" for @%s::ISA", |
103 | sv, HvNAME(stash)); |
6d4a7be2 |
104 | continue; |
105 | } |
301daebc |
106 | if (&PL_sv_yes == isa_lookup(basestash, name, name_stash, |
107 | len, level + 1)) { |
3280af22 |
108 | (void)hv_store(hv,name,len,&PL_sv_yes,0); |
109 | return &PL_sv_yes; |
6d4a7be2 |
110 | } |
111 | } |
3280af22 |
112 | (void)hv_store(hv,name,len,&PL_sv_no,0); |
6d4a7be2 |
113 | } |
114 | } |
115 | |
e09f3e01 |
116 | return boolSV(strEQ(name, "UNIVERSAL")); |
6d4a7be2 |
117 | } |
118 | |
954c1994 |
119 | /* |
ccfc67b7 |
120 | =head1 SV Manipulation Functions |
121 | |
954c1994 |
122 | =for apidoc sv_derived_from |
123 | |
124 | Returns a boolean indicating whether the SV is derived from the specified |
125 | class. This is the function that implements C<UNIVERSAL::isa>. It works |
126 | for class names as well as for objects. |
127 | |
128 | =cut |
129 | */ |
130 | |
55497cff |
131 | bool |
864dbfa3 |
132 | Perl_sv_derived_from(pTHX_ SV *sv, const char *name) |
55497cff |
133 | { |
55497cff |
134 | char *type; |
135 | HV *stash; |
301daebc |
136 | HV *name_stash; |
46e4b22b |
137 | |
55497cff |
138 | stash = Nullhv; |
139 | type = Nullch; |
46e4b22b |
140 | |
55497cff |
141 | if (SvGMAGICAL(sv)) |
142 | mg_get(sv) ; |
143 | |
144 | if (SvROK(sv)) { |
145 | sv = SvRV(sv); |
146 | type = sv_reftype(sv,0); |
46e4b22b |
147 | if (SvOBJECT(sv)) |
55497cff |
148 | stash = SvSTASH(sv); |
149 | } |
150 | else { |
151 | stash = gv_stashsv(sv, FALSE); |
152 | } |
46e4b22b |
153 | |
301daebc |
154 | name_stash = gv_stashpv(name, FALSE); |
155 | |
55497cff |
156 | return (type && strEQ(type,name)) || |
301daebc |
157 | (stash && isa_lookup(stash, name, name_stash, strlen(name), 0) |
158 | == &PL_sv_yes) |
55497cff |
159 | ? TRUE |
160 | : FALSE ; |
55497cff |
161 | } |
162 | |
1b026014 |
163 | #include "XSUB.h" |
164 | |
acfe0abc |
165 | void XS_UNIVERSAL_isa(pTHX_ CV *cv); |
166 | void XS_UNIVERSAL_can(pTHX_ CV *cv); |
167 | void XS_UNIVERSAL_VERSION(pTHX_ CV *cv); |
439cb1c4 |
168 | XS(XS_version_new); |
169 | XS(XS_version_stringify); |
170 | XS(XS_version_numify); |
171 | XS(XS_version_vcmp); |
172 | XS(XS_version_boolean); |
173 | XS(XS_version_noop); |
1b026014 |
174 | XS(XS_utf8_valid); |
175 | XS(XS_utf8_encode); |
176 | XS(XS_utf8_decode); |
177 | XS(XS_utf8_upgrade); |
178 | XS(XS_utf8_downgrade); |
179 | XS(XS_utf8_unicode_to_native); |
180 | XS(XS_utf8_native_to_unicode); |
29569577 |
181 | XS(XS_Internals_SvREADONLY); |
182 | XS(XS_Internals_SvREFCNT); |
f044d0d1 |
183 | XS(XS_Internals_hv_clear_placehold); |
39f7a870 |
184 | XS(XS_PerlIO_get_layers); |
39cff0d9 |
185 | XS(XS_Regexp_DESTROY); |
0cb96387 |
186 | |
187 | void |
188 | Perl_boot_core_UNIVERSAL(pTHX) |
189 | { |
190 | char *file = __FILE__; |
191 | |
192 | newXS("UNIVERSAL::isa", XS_UNIVERSAL_isa, file); |
193 | newXS("UNIVERSAL::can", XS_UNIVERSAL_can, file); |
194 | newXS("UNIVERSAL::VERSION", XS_UNIVERSAL_VERSION, file); |
439cb1c4 |
195 | { |
ad63d80f |
196 | /* register the overloading (type 'A') magic */ |
197 | PL_amagic_generation++; |
439cb1c4 |
198 | /* Make it findable via fetchmethod */ |
be2ebcad |
199 | newXS("version::()", XS_version_noop, file); |
439cb1c4 |
200 | newXS("version::new", XS_version_new, file); |
201 | newXS("version::(\"\"", XS_version_stringify, file); |
202 | newXS("version::stringify", XS_version_stringify, file); |
203 | newXS("version::(0+", XS_version_numify, file); |
204 | newXS("version::numify", XS_version_numify, file); |
205 | newXS("version::(cmp", XS_version_vcmp, file); |
206 | newXS("version::(<=>", XS_version_vcmp, file); |
207 | newXS("version::vcmp", XS_version_vcmp, file); |
208 | newXS("version::(bool", XS_version_boolean, file); |
209 | newXS("version::boolean", XS_version_boolean, file); |
210 | newXS("version::(nomethod", XS_version_noop, file); |
211 | newXS("version::noop", XS_version_noop, file); |
212 | } |
1b026014 |
213 | newXS("utf8::valid", XS_utf8_valid, file); |
214 | newXS("utf8::encode", XS_utf8_encode, file); |
215 | newXS("utf8::decode", XS_utf8_decode, file); |
216 | newXS("utf8::upgrade", XS_utf8_upgrade, file); |
217 | newXS("utf8::downgrade", XS_utf8_downgrade, file); |
218 | newXS("utf8::native_to_unicode", XS_utf8_native_to_unicode, file); |
219 | newXS("utf8::unicode_to_native", XS_utf8_unicode_to_native, file); |
29569577 |
220 | newXSproto("Internals::SvREADONLY",XS_Internals_SvREADONLY, file, "\\[$%@];$"); |
221 | newXSproto("Internals::SvREFCNT",XS_Internals_SvREFCNT, file, "\\[$%@];$"); |
dfd4ef2f |
222 | newXSproto("Internals::hv_clear_placeholders", |
f044d0d1 |
223 | XS_Internals_hv_clear_placehold, file, "\\%"); |
9d569fce |
224 | newXSproto("PerlIO::get_layers", |
225 | XS_PerlIO_get_layers, file, "*;@"); |
39cff0d9 |
226 | newXS("Regexp::DESTROY", XS_Regexp_DESTROY, file); |
0cb96387 |
227 | } |
228 | |
55497cff |
229 | |
6d4a7be2 |
230 | XS(XS_UNIVERSAL_isa) |
231 | { |
232 | dXSARGS; |
55497cff |
233 | SV *sv; |
234 | char *name; |
2d8e6c8d |
235 | STRLEN n_a; |
6d4a7be2 |
236 | |
237 | if (items != 2) |
cea2e8a9 |
238 | Perl_croak(aTHX_ "Usage: UNIVERSAL::isa(reference, kind)"); |
6d4a7be2 |
239 | |
240 | sv = ST(0); |
f8f70380 |
241 | |
d3f7f2b2 |
242 | if (SvGMAGICAL(sv)) |
243 | mg_get(sv); |
244 | |
253ecd6d |
245 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)) |
246 | || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv)))) |
f8f70380 |
247 | XSRETURN_UNDEF; |
248 | |
2d8e6c8d |
249 | name = (char *)SvPV(ST(1),n_a); |
6d4a7be2 |
250 | |
54310121 |
251 | ST(0) = boolSV(sv_derived_from(sv, name)); |
6d4a7be2 |
252 | XSRETURN(1); |
253 | } |
254 | |
6d4a7be2 |
255 | XS(XS_UNIVERSAL_can) |
256 | { |
257 | dXSARGS; |
258 | SV *sv; |
259 | char *name; |
260 | SV *rv; |
6f08146e |
261 | HV *pkg = NULL; |
2d8e6c8d |
262 | STRLEN n_a; |
6d4a7be2 |
263 | |
264 | if (items != 2) |
cea2e8a9 |
265 | Perl_croak(aTHX_ "Usage: UNIVERSAL::can(object-ref, method)"); |
6d4a7be2 |
266 | |
267 | sv = ST(0); |
f8f70380 |
268 | |
d3f7f2b2 |
269 | if (SvGMAGICAL(sv)) |
270 | mg_get(sv); |
271 | |
253ecd6d |
272 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)) |
273 | || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv)))) |
f8f70380 |
274 | XSRETURN_UNDEF; |
275 | |
2d8e6c8d |
276 | name = (char *)SvPV(ST(1),n_a); |
3280af22 |
277 | rv = &PL_sv_undef; |
6d4a7be2 |
278 | |
46e4b22b |
279 | if (SvROK(sv)) { |
6f08146e |
280 | sv = (SV*)SvRV(sv); |
46e4b22b |
281 | if (SvOBJECT(sv)) |
6f08146e |
282 | pkg = SvSTASH(sv); |
283 | } |
284 | else { |
285 | pkg = gv_stashsv(sv, FALSE); |
286 | } |
287 | |
288 | if (pkg) { |
dc848c6f |
289 | GV *gv = gv_fetchmethod_autoload(pkg, name, FALSE); |
290 | if (gv && isGV(gv)) |
291 | rv = sv_2mortal(newRV((SV*)GvCV(gv))); |
6d4a7be2 |
292 | } |
293 | |
294 | ST(0) = rv; |
295 | XSRETURN(1); |
296 | } |
297 | |
6d4a7be2 |
298 | XS(XS_UNIVERSAL_VERSION) |
299 | { |
300 | dXSARGS; |
301 | HV *pkg; |
302 | GV **gvp; |
303 | GV *gv; |
304 | SV *sv; |
305 | char *undef; |
306 | |
1571675a |
307 | if (SvROK(ST(0))) { |
6d4a7be2 |
308 | sv = (SV*)SvRV(ST(0)); |
1571675a |
309 | if (!SvOBJECT(sv)) |
cea2e8a9 |
310 | Perl_croak(aTHX_ "Cannot find version of an unblessed reference"); |
6d4a7be2 |
311 | pkg = SvSTASH(sv); |
312 | } |
313 | else { |
314 | pkg = gv_stashsv(ST(0), FALSE); |
315 | } |
316 | |
317 | gvp = pkg ? (GV**)hv_fetch(pkg,"VERSION",7,FALSE) : Null(GV**); |
318 | |
d4bea2fb |
319 | if (gvp && isGV(gv = *gvp) && SvOK(sv = GvSV(gv))) { |
6d4a7be2 |
320 | SV *nsv = sv_newmortal(); |
321 | sv_setsv(nsv, sv); |
322 | sv = nsv; |
323 | undef = Nullch; |
324 | } |
325 | else { |
3280af22 |
326 | sv = (SV*)&PL_sv_undef; |
6d4a7be2 |
327 | undef = "(undef)"; |
328 | } |
329 | |
1571675a |
330 | if (items > 1) { |
331 | STRLEN len; |
332 | SV *req = ST(1); |
333 | |
62658f4d |
334 | if (undef) { |
335 | if (pkg) |
336 | Perl_croak(aTHX_ |
337 | "%s does not define $%s::VERSION--version check failed", |
338 | HvNAME(pkg), HvNAME(pkg)); |
339 | else { |
340 | char *str = SvPVx(ST(0), len); |
341 | |
342 | Perl_croak(aTHX_ |
343 | "%s defines neither package nor VERSION--version check failed", str); |
344 | } |
345 | } |
ad63d80f |
346 | if ( !sv_derived_from(sv, "version")) |
347 | sv = new_version(sv); |
348 | |
349 | if ( !sv_derived_from(req, "version")) |
350 | req = new_version(req); |
1571675a |
351 | |
ad63d80f |
352 | if ( vcmp( SvRV(req), SvRV(sv) ) > 0 ) |
e3feee4e |
353 | Perl_croak(aTHX_ |
354 | "%s version %"SVf" required--this is only version %"SVf, |
0773b1f0 |
355 | HvNAME(pkg), req, sv); |
2d8e6c8d |
356 | } |
6d4a7be2 |
357 | |
358 | ST(0) = sv; |
359 | |
360 | XSRETURN(1); |
361 | } |
362 | |
439cb1c4 |
363 | XS(XS_version_new) |
364 | { |
365 | dXSARGS; |
129318bd |
366 | if (items > 3) |
439cb1c4 |
367 | Perl_croak(aTHX_ "Usage: version::new(class, version)"); |
368 | SP -= items; |
369 | { |
370 | /* char * class = (char *)SvPV_nolen(ST(0)); */ |
129318bd |
371 | SV *version = ST(1); |
372 | if (items == 3 ) |
373 | { |
374 | char *vs = savepvn(SvPVX(ST(2)),SvCUR(ST(2))); |
9be22fdc |
375 | version = Perl_newSVpvf(aTHX_ "v%s",vs); |
129318bd |
376 | } |
439cb1c4 |
377 | |
129318bd |
378 | PUSHs(new_version(version)); |
439cb1c4 |
379 | PUTBACK; |
380 | return; |
381 | } |
382 | } |
383 | |
384 | XS(XS_version_stringify) |
385 | { |
386 | dXSARGS; |
387 | if (items < 1) |
388 | Perl_croak(aTHX_ "Usage: version::stringify(lobj, ...)"); |
389 | SP -= items; |
390 | { |
391 | SV * lobj; |
392 | |
393 | if (sv_derived_from(ST(0), "version")) { |
394 | SV *tmp = SvRV(ST(0)); |
395 | lobj = tmp; |
396 | } |
397 | else |
ba329e04 |
398 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 |
399 | |
400 | { |
ad63d80f |
401 | PUSHs(vstringify(lobj)); |
439cb1c4 |
402 | } |
403 | |
404 | PUTBACK; |
405 | return; |
406 | } |
407 | } |
408 | |
409 | XS(XS_version_numify) |
410 | { |
411 | dXSARGS; |
412 | if (items < 1) |
413 | Perl_croak(aTHX_ "Usage: version::numify(lobj, ...)"); |
414 | SP -= items; |
415 | { |
416 | SV * lobj; |
417 | |
418 | if (sv_derived_from(ST(0), "version")) { |
419 | SV *tmp = SvRV(ST(0)); |
420 | lobj = tmp; |
421 | } |
422 | else |
ba329e04 |
423 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 |
424 | |
425 | { |
ad63d80f |
426 | PUSHs(vnumify(lobj)); |
439cb1c4 |
427 | } |
428 | |
429 | PUTBACK; |
430 | return; |
431 | } |
432 | } |
433 | |
434 | XS(XS_version_vcmp) |
435 | { |
436 | dXSARGS; |
437 | if (items < 1) |
438 | Perl_croak(aTHX_ "Usage: version::vcmp(lobj, ...)"); |
439 | SP -= items; |
440 | { |
441 | SV * lobj; |
442 | |
443 | if (sv_derived_from(ST(0), "version")) { |
444 | SV *tmp = SvRV(ST(0)); |
445 | lobj = tmp; |
446 | } |
447 | else |
ba329e04 |
448 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 |
449 | |
450 | { |
451 | SV *rs; |
452 | SV *rvs; |
453 | SV * robj = ST(1); |
454 | IV swap = (IV)SvIV(ST(2)); |
455 | |
456 | if ( ! sv_derived_from(robj, "version") ) |
457 | { |
458 | robj = new_version(robj); |
459 | } |
460 | rvs = SvRV(robj); |
461 | |
462 | if ( swap ) |
463 | { |
ad63d80f |
464 | rs = newSViv(vcmp(rvs,lobj)); |
439cb1c4 |
465 | } |
466 | else |
467 | { |
ad63d80f |
468 | rs = newSViv(vcmp(lobj,rvs)); |
439cb1c4 |
469 | } |
470 | |
471 | PUSHs(rs); |
472 | } |
473 | |
474 | PUTBACK; |
475 | return; |
476 | } |
477 | } |
478 | |
479 | XS(XS_version_boolean) |
480 | { |
481 | dXSARGS; |
482 | if (items < 1) |
483 | Perl_croak(aTHX_ "Usage: version::boolean(lobj, ...)"); |
484 | SP -= items; |
485 | { |
486 | SV * lobj; |
487 | |
488 | if (sv_derived_from(ST(0), "version")) { |
489 | SV *tmp = SvRV(ST(0)); |
490 | lobj = tmp; |
491 | } |
492 | else |
ba329e04 |
493 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 |
494 | |
495 | { |
496 | SV *rs; |
ad63d80f |
497 | rs = newSViv( vcmp(lobj,new_version(newSVpvn("0",1))) ); |
439cb1c4 |
498 | PUSHs(rs); |
499 | } |
500 | |
501 | PUTBACK; |
502 | return; |
503 | } |
504 | } |
505 | |
506 | XS(XS_version_noop) |
507 | { |
508 | dXSARGS; |
509 | if (items < 1) |
510 | Perl_croak(aTHX_ "Usage: version::noop(lobj, ...)"); |
511 | { |
512 | SV * lobj; |
513 | |
514 | if (sv_derived_from(ST(0), "version")) { |
515 | SV *tmp = SvRV(ST(0)); |
516 | lobj = tmp; |
517 | } |
518 | else |
ba329e04 |
519 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 |
520 | |
521 | { |
ba329e04 |
522 | Perl_croak(aTHX_ "operation not supported with version object"); |
439cb1c4 |
523 | } |
524 | |
525 | } |
526 | XSRETURN_EMPTY; |
527 | } |
528 | |
1b026014 |
529 | XS(XS_utf8_valid) |
530 | { |
531 | dXSARGS; |
532 | if (items != 1) |
533 | Perl_croak(aTHX_ "Usage: utf8::valid(sv)"); |
534 | { |
535 | SV * sv = ST(0); |
536 | { |
537 | STRLEN len; |
538 | char *s = SvPV(sv,len); |
539 | if (!SvUTF8(sv) || is_utf8_string((U8*)s,len)) |
540 | XSRETURN_YES; |
541 | else |
542 | XSRETURN_NO; |
543 | } |
544 | } |
545 | XSRETURN_EMPTY; |
546 | } |
547 | |
548 | XS(XS_utf8_encode) |
549 | { |
550 | dXSARGS; |
551 | if (items != 1) |
552 | Perl_croak(aTHX_ "Usage: utf8::encode(sv)"); |
553 | { |
554 | SV * sv = ST(0); |
555 | |
556 | sv_utf8_encode(sv); |
557 | } |
558 | XSRETURN_EMPTY; |
559 | } |
560 | |
561 | XS(XS_utf8_decode) |
562 | { |
563 | dXSARGS; |
564 | if (items != 1) |
565 | Perl_croak(aTHX_ "Usage: utf8::decode(sv)"); |
566 | { |
567 | SV * sv = ST(0); |
568 | bool RETVAL; |
569 | |
570 | RETVAL = sv_utf8_decode(sv); |
571 | ST(0) = boolSV(RETVAL); |
572 | sv_2mortal(ST(0)); |
573 | } |
574 | XSRETURN(1); |
575 | } |
576 | |
577 | XS(XS_utf8_upgrade) |
578 | { |
579 | dXSARGS; |
580 | if (items != 1) |
581 | Perl_croak(aTHX_ "Usage: utf8::upgrade(sv)"); |
582 | { |
583 | SV * sv = ST(0); |
584 | STRLEN RETVAL; |
585 | dXSTARG; |
586 | |
587 | RETVAL = sv_utf8_upgrade(sv); |
588 | XSprePUSH; PUSHi((IV)RETVAL); |
589 | } |
590 | XSRETURN(1); |
591 | } |
592 | |
593 | XS(XS_utf8_downgrade) |
594 | { |
595 | dXSARGS; |
596 | if (items < 1 || items > 2) |
597 | Perl_croak(aTHX_ "Usage: utf8::downgrade(sv, failok=0)"); |
598 | { |
599 | SV * sv = ST(0); |
600 | bool failok; |
601 | bool RETVAL; |
602 | |
603 | if (items < 2) |
604 | failok = 0; |
605 | else { |
606 | failok = (int)SvIV(ST(1)); |
607 | } |
608 | |
609 | RETVAL = sv_utf8_downgrade(sv, failok); |
610 | ST(0) = boolSV(RETVAL); |
611 | sv_2mortal(ST(0)); |
612 | } |
613 | XSRETURN(1); |
614 | } |
615 | |
616 | XS(XS_utf8_native_to_unicode) |
617 | { |
618 | dXSARGS; |
619 | UV uv = SvUV(ST(0)); |
b7953727 |
620 | |
621 | if (items > 1) |
622 | Perl_croak(aTHX_ "Usage: utf8::native_to_unicode(sv)"); |
623 | |
1b026014 |
624 | ST(0) = sv_2mortal(newSViv(NATIVE_TO_UNI(uv))); |
625 | XSRETURN(1); |
626 | } |
627 | |
628 | XS(XS_utf8_unicode_to_native) |
629 | { |
630 | dXSARGS; |
631 | UV uv = SvUV(ST(0)); |
b7953727 |
632 | |
633 | if (items > 1) |
634 | Perl_croak(aTHX_ "Usage: utf8::unicode_to_native(sv)"); |
635 | |
1b026014 |
636 | ST(0) = sv_2mortal(newSViv(UNI_TO_NATIVE(uv))); |
637 | XSRETURN(1); |
638 | } |
639 | |
14a976d6 |
640 | XS(XS_Internals_SvREADONLY) /* This is dangerous stuff. */ |
29569577 |
641 | { |
642 | dXSARGS; |
643 | SV *sv = SvRV(ST(0)); |
644 | if (items == 1) { |
645 | if (SvREADONLY(sv)) |
646 | XSRETURN_YES; |
647 | else |
648 | XSRETURN_NO; |
649 | } |
650 | else if (items == 2) { |
651 | if (SvTRUE(ST(1))) { |
652 | SvREADONLY_on(sv); |
653 | XSRETURN_YES; |
654 | } |
655 | else { |
14a976d6 |
656 | /* I hope you really know what you are doing. */ |
29569577 |
657 | SvREADONLY_off(sv); |
658 | XSRETURN_NO; |
659 | } |
660 | } |
14a976d6 |
661 | XSRETURN_UNDEF; /* Can't happen. */ |
29569577 |
662 | } |
663 | |
14a976d6 |
664 | XS(XS_Internals_SvREFCNT) /* This is dangerous stuff. */ |
29569577 |
665 | { |
666 | dXSARGS; |
667 | SV *sv = SvRV(ST(0)); |
668 | if (items == 1) |
14a976d6 |
669 | XSRETURN_IV(SvREFCNT(sv) - 1); /* Minus the ref created for us. */ |
29569577 |
670 | else if (items == 2) { |
14a976d6 |
671 | /* I hope you really know what you are doing. */ |
29569577 |
672 | SvREFCNT(sv) = SvIV(ST(1)); |
673 | XSRETURN_IV(SvREFCNT(sv)); |
674 | } |
14a976d6 |
675 | XSRETURN_UNDEF; /* Can't happen. */ |
29569577 |
676 | } |
677 | |
dfd4ef2f |
678 | /* Maybe this should return the number of placeholders found in scalar context, |
679 | and a list of them in list context. */ |
f044d0d1 |
680 | XS(XS_Internals_hv_clear_placehold) |
dfd4ef2f |
681 | { |
682 | dXSARGS; |
683 | HV *hv = (HV *) SvRV(ST(0)); |
684 | |
685 | /* I don't care how many parameters were passed in, but I want to avoid |
686 | the unused variable warning. */ |
687 | |
eb160463 |
688 | items = (I32)HvPLACEHOLDERS(hv); |
dfd4ef2f |
689 | |
690 | if (items) { |
691 | HE *entry; |
692 | I32 riter = HvRITER(hv); |
693 | HE *eiter = HvEITER(hv); |
694 | hv_iterinit(hv); |
fe7bca90 |
695 | /* This may look suboptimal with the items *after* the iternext, but |
696 | it's quite deliberate. We only get here with items==0 if we've |
697 | just deleted the last placeholder in the hash. If we've just done |
698 | that then it means that the hash is in lazy delete mode, and the |
699 | HE is now only referenced in our iterator. If we just quit the loop |
700 | and discarded our iterator then the HE leaks. So we do the && the |
701 | other way to ensure iternext is called just one more time, which |
702 | has the side effect of triggering the lazy delete. */ |
703 | while ((entry = hv_iternext_flags(hv, HV_ITERNEXT_WANTPLACEHOLDERS)) |
704 | && items) { |
dfd4ef2f |
705 | SV *val = hv_iterval(hv, entry); |
706 | |
707 | if (val == &PL_sv_undef) { |
708 | |
709 | /* It seems that I have to go back in the front of the hash |
710 | API to delete a hash, even though I have a HE structure |
711 | pointing to the very entry I want to delete, and could hold |
712 | onto the previous HE that points to it. And it's easier to |
713 | go in with SVs as I can then specify the precomputed hash, |
714 | and don't have fun and games with utf8 keys. */ |
715 | SV *key = hv_iterkeysv(entry); |
716 | |
717 | hv_delete_ent (hv, key, G_DISCARD, HeHASH(entry)); |
718 | items--; |
719 | } |
720 | } |
721 | HvRITER(hv) = riter; |
722 | HvEITER(hv) = eiter; |
723 | } |
724 | |
725 | XSRETURN(0); |
726 | } |
39f7a870 |
727 | |
39cff0d9 |
728 | XS(XS_Regexp_DESTROY) |
729 | { |
730 | |
731 | } |
732 | |
39f7a870 |
733 | XS(XS_PerlIO_get_layers) |
734 | { |
735 | dXSARGS; |
736 | if (items < 1 || items % 2 == 0) |
737 | Perl_croak(aTHX_ "Usage: PerlIO_get_layers(filehandle[,args])"); |
5fef3b4a |
738 | #ifdef USE_PERLIO |
39f7a870 |
739 | { |
740 | SV * sv; |
741 | GV * gv; |
742 | IO * io; |
743 | bool input = TRUE; |
744 | bool details = FALSE; |
745 | |
746 | if (items > 1) { |
39f7a870 |
747 | SV **svp; |
748 | |
749 | for (svp = MARK + 2; svp <= SP; svp += 2) { |
750 | SV **varp = svp; |
751 | SV **valp = svp + 1; |
752 | STRLEN klen; |
753 | char *key = SvPV(*varp, klen); |
754 | |
755 | switch (*key) { |
756 | case 'i': |
757 | if (klen == 5 && memEQ(key, "input", 5)) { |
758 | input = SvTRUE(*valp); |
759 | break; |
760 | } |
761 | goto fail; |
762 | case 'o': |
763 | if (klen == 6 && memEQ(key, "output", 6)) { |
764 | input = !SvTRUE(*valp); |
765 | break; |
766 | } |
767 | goto fail; |
768 | case 'd': |
769 | if (klen == 7 && memEQ(key, "details", 7)) { |
770 | details = SvTRUE(*valp); |
771 | break; |
772 | } |
773 | goto fail; |
774 | default: |
775 | fail: |
776 | Perl_croak(aTHX_ |
777 | "get_layers: unknown argument '%s'", |
778 | key); |
779 | } |
780 | } |
781 | |
782 | SP -= (items - 1); |
783 | } |
784 | |
785 | sv = POPs; |
786 | gv = (GV*)sv; |
787 | |
788 | if (!isGV(sv)) { |
789 | if (SvROK(sv) && isGV(SvRV(sv))) |
790 | gv = (GV*)SvRV(sv); |
791 | else |
792 | gv = gv_fetchpv(SvPVX(sv), FALSE, SVt_PVIO); |
793 | } |
794 | |
795 | if (gv && (io = GvIO(gv))) { |
796 | dTARGET; |
797 | AV* av = PerlIO_get_layers(aTHX_ input ? |
798 | IoIFP(io) : IoOFP(io)); |
799 | I32 i; |
800 | I32 last = av_len(av); |
801 | I32 nitem = 0; |
802 | |
803 | for (i = last; i >= 0; i -= 3) { |
804 | SV **namsvp; |
805 | SV **argsvp; |
806 | SV **flgsvp; |
807 | bool namok, argok, flgok; |
808 | |
809 | namsvp = av_fetch(av, i - 2, FALSE); |
810 | argsvp = av_fetch(av, i - 1, FALSE); |
811 | flgsvp = av_fetch(av, i, FALSE); |
812 | |
813 | namok = namsvp && *namsvp && SvPOK(*namsvp); |
814 | argok = argsvp && *argsvp && SvPOK(*argsvp); |
815 | flgok = flgsvp && *flgsvp && SvIOK(*flgsvp); |
816 | |
817 | if (details) { |
818 | XPUSHs(namok ? |
819 | newSVpv(SvPVX(*namsvp), 0) : &PL_sv_undef); |
820 | XPUSHs(argok ? |
821 | newSVpv(SvPVX(*argsvp), 0) : &PL_sv_undef); |
822 | if (flgok) |
823 | XPUSHi(SvIVX(*flgsvp)); |
824 | else |
825 | XPUSHs(&PL_sv_undef); |
826 | nitem += 3; |
827 | } |
828 | else { |
829 | if (namok && argok) |
830 | XPUSHs(Perl_newSVpvf(aTHX_ "%"SVf"(%"SVf")", |
831 | *namsvp, *argsvp)); |
832 | else if (namok) |
833 | XPUSHs(Perl_newSVpvf(aTHX_ "%"SVf, *namsvp)); |
834 | else |
835 | XPUSHs(&PL_sv_undef); |
836 | nitem++; |
837 | if (flgok) { |
838 | IV flags = SvIVX(*flgsvp); |
839 | |
840 | if (flags & PERLIO_F_UTF8) { |
841 | XPUSHs(newSVpvn("utf8", 4)); |
842 | nitem++; |
843 | } |
844 | } |
845 | } |
846 | } |
847 | |
848 | SvREFCNT_dec(av); |
849 | |
850 | XSRETURN(nitem); |
851 | } |
852 | } |
5fef3b4a |
853 | #endif |
39f7a870 |
854 | |
855 | XSRETURN(0); |
856 | } |
857 | |