Commit | Line | Data |
---|---|---|
d6376244 JH |
1 | /* universal.c |
2 | * | |
4bb101f2 JH |
3 | * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, |
4 | * by Larry Wall and others | |
d6376244 JH |
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 AT |
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 JH |
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 MS |
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 MS |
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 GS |
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 GS |
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 GS |
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 GS |
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 NIS |
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 NC |
102 | "Can't locate package %"SVf" for @%s::ISA", |
103 | sv, HvNAME(stash)); | |
6d4a7be2 | 104 | continue; |
105 | } | |
301daebc MS |
106 | if (&PL_sv_yes == isa_lookup(basestash, name, name_stash, |
107 | len, level + 1)) { | |
3280af22 NIS |
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 JH |
120 | =head1 SV Manipulation Functions |
121 | ||
954c1994 GS |
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 MS |
154 | name_stash = gv_stashpv(name, FALSE); |
155 | ||
55497cff | 156 | return (type && strEQ(type,name)) || |
301daebc MS |
157 | (stash && isa_lookup(stash, name, name_stash, strlen(name), 0) |
158 | == &PL_sv_yes) | |
55497cff | 159 | ? TRUE |
160 | : FALSE ; | |
55497cff | 161 | } |
162 | ||
1b026014 NIS |
163 | #include "XSUB.h" |
164 | ||
acfe0abc GS |
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 JP |
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 NIS |
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 JH |
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 GS |
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 JP |
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 JP |
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 NIS |
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 JH |
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 JH |
224 | newXSproto("PerlIO::get_layers", |
225 | XS_PerlIO_get_layers, file, "*;@"); | |
39cff0d9 | 226 | newXS("Regexp::DESTROY", XS_Regexp_DESTROY, file); |
0cb96387 GS |
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 GS |
242 | if (SvGMAGICAL(sv)) |
243 | mg_get(sv); | |
244 | ||
253ecd6d RGS |
245 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)) |
246 | || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv)))) | |
f8f70380 GS |
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 GS |
269 | if (SvGMAGICAL(sv)) |
270 | mg_get(sv); | |
271 | ||
253ecd6d RGS |
272 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)) |
273 | || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv)))) | |
f8f70380 GS |
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 NIS |
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 GS |
330 | if (items > 1) { |
331 | STRLEN len; | |
332 | SV *req = ST(1); | |
333 | ||
62658f4d PM |
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 JP |
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 RB |
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 JP |
363 | XS(XS_version_new) |
364 | { | |
365 | dXSARGS; | |
129318bd | 366 | if (items > 3) |
439cb1c4 JP |
367 | Perl_croak(aTHX_ "Usage: version::new(class, version)"); |
368 | SP -= items; | |
369 | { | |
370 | /* char * class = (char *)SvPV_nolen(ST(0)); */ | |
129318bd JP |
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 JP |
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 JP |
399 | |
400 | { | |
ad63d80f | 401 | PUSHs(vstringify(lobj)); |
439cb1c4 JP |
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 JP |
424 | |
425 | { | |
ad63d80f | 426 | PUSHs(vnumify(lobj)); |
439cb1c4 JP |
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 JP |
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 JP |
465 | } |
466 | else | |
467 | { | |
ad63d80f | 468 | rs = newSViv(vcmp(lobj,rvs)); |
439cb1c4 JP |
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 JP |
494 | |
495 | { | |
496 | SV *rs; | |
ad63d80f | 497 | rs = newSViv( vcmp(lobj,new_version(newSVpvn("0",1))) ); |
439cb1c4 JP |
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 JP |
520 | |
521 | { | |
ba329e04 | 522 | Perl_croak(aTHX_ "operation not supported with version object"); |
439cb1c4 JP |
523 | } |
524 | ||
525 | } | |
526 | XSRETURN_EMPTY; | |
527 | } | |
528 | ||
1b026014 NIS |
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 JH |
620 | |
621 | if (items > 1) | |
622 | Perl_croak(aTHX_ "Usage: utf8::native_to_unicode(sv)"); | |
623 | ||
1b026014 NIS |
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 JH |
632 | |
633 | if (items > 1) | |
634 | Perl_croak(aTHX_ "Usage: utf8::unicode_to_native(sv)"); | |
635 | ||
1b026014 NIS |
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 JH |
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 JH |
657 | SvREADONLY_off(sv); |
658 | XSRETURN_NO; | |
659 | } | |
660 | } | |
14a976d6 | 661 | XSRETURN_UNDEF; /* Can't happen. */ |
29569577 JH |
662 | } |
663 | ||
14a976d6 | 664 | XS(XS_Internals_SvREFCNT) /* This is dangerous stuff. */ |
29569577 JH |
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 JH |
672 | SvREFCNT(sv) = SvIV(ST(1)); |
673 | XSRETURN_IV(SvREFCNT(sv)); | |
674 | } | |
14a976d6 | 675 | XSRETURN_UNDEF; /* Can't happen. */ |
29569577 JH |
676 | } |
677 | ||
dfd4ef2f NC |
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 NC |
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 NC |
689 | |
690 | if (items) { | |
691 | HE *entry; | |
692 | I32 riter = HvRITER(hv); | |
693 | HE *eiter = HvEITER(hv); | |
694 | hv_iterinit(hv); | |
fe7bca90 NC |
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 NC |
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 AE |
728 | XS(XS_Regexp_DESTROY) |
729 | { | |
730 | ||
731 | } | |
732 | ||
39f7a870 JH |
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 JH |
739 | { |
740 | SV * sv; | |
741 | GV * gv; | |
742 | IO * io; | |
743 | bool input = TRUE; | |
744 | bool details = FALSE; | |
745 | ||
746 | if (items > 1) { | |
39f7a870 JH |
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 JH |
854 | |
855 | XSRETURN(0); | |
856 | } | |
857 |