Commit | Line | Data |
---|---|---|
d6376244 JH |
1 | /* universal.c |
2 | * | |
4c79ee7a | 3 | * Copyright (c) 1997-2003, Larry Wall |
d6376244 JH |
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 | * | |
8 | */ | |
9 | ||
d31a8517 AT |
10 | /* |
11 | * "The roots of those mountains must be roots indeed; there must be | |
12 | * great secrets buried there which have not been discovered since the | |
13 | * beginning." --Gandalf, relating Gollum's story | |
14 | */ | |
15 | ||
6d4a7be2 | 16 | #include "EXTERN.h" |
864dbfa3 | 17 | #define PERL_IN_UNIVERSAL_C |
6d4a7be2 | 18 | #include "perl.h" |
6d4a7be2 | 19 | |
39f7a870 JH |
20 | #ifdef USE_PERLIO |
21 | #include "perliol.h" /* For the PERLIO_F_XXX */ | |
22 | #endif | |
23 | ||
6d4a7be2 PP |
24 | /* |
25 | * Contributed by Graham Barr <Graham.Barr@tiuk.ti.com> | |
26 | * The main guts of traverse_isa was actually copied from gv_fetchmeth | |
27 | */ | |
28 | ||
76e3520e | 29 | STATIC SV * |
301daebc MS |
30 | S_isa_lookup(pTHX_ HV *stash, const char *name, HV* name_stash, |
31 | int len, int level) | |
6d4a7be2 PP |
32 | { |
33 | AV* av; | |
34 | GV* gv; | |
35 | GV** gvp; | |
36 | HV* hv = Nullhv; | |
46e4b22b | 37 | SV* subgen = Nullsv; |
6d4a7be2 | 38 | |
301daebc MS |
39 | /* A stash/class can go by many names (ie. User == main::User), so |
40 | we compare the stash itself just in case */ | |
41 | if (name_stash && (stash == name_stash)) | |
42 | return &PL_sv_yes; | |
6d4a7be2 | 43 | |
46e4b22b | 44 | if (strEQ(HvNAME(stash), name)) |
3280af22 | 45 | return &PL_sv_yes; |
6d4a7be2 PP |
46 | |
47 | if (level > 100) | |
46e4b22b GS |
48 | Perl_croak(aTHX_ "Recursive inheritance detected in package '%s'", |
49 | HvNAME(stash)); | |
6d4a7be2 PP |
50 | |
51 | gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, FALSE); | |
52 | ||
46e4b22b GS |
53 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (subgen = GvSV(gv)) |
54 | && (hv = GvHV(gv))) | |
55 | { | |
eb160463 | 56 | if (SvIV(subgen) == (IV)PL_sub_generation) { |
46e4b22b GS |
57 | SV* sv; |
58 | SV** svp = (SV**)hv_fetch(hv, name, len, FALSE); | |
59 | if (svp && (sv = *svp) != (SV*)&PL_sv_undef) { | |
60 | DEBUG_o( Perl_deb(aTHX_ "Using cached ISA %s for package %s\n", | |
61 | name, HvNAME(stash)) ); | |
62 | return sv; | |
63 | } | |
64 | } | |
65 | else { | |
66 | DEBUG_o( Perl_deb(aTHX_ "ISA Cache in package %s is stale\n", | |
67 | HvNAME(stash)) ); | |
68 | hv_clear(hv); | |
69 | sv_setiv(subgen, PL_sub_generation); | |
70 | } | |
6d4a7be2 PP |
71 | } |
72 | ||
73 | gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE); | |
46e4b22b | 74 | |
3280af22 | 75 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
46e4b22b | 76 | if (!hv || !subgen) { |
6d4a7be2 PP |
77 | gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, TRUE); |
78 | ||
79 | gv = *gvp; | |
80 | ||
81 | if (SvTYPE(gv) != SVt_PVGV) | |
82 | gv_init(gv, stash, "::ISA::CACHE::", 14, TRUE); | |
83 | ||
46e4b22b GS |
84 | if (!hv) |
85 | hv = GvHVn(gv); | |
86 | if (!subgen) { | |
87 | subgen = newSViv(PL_sub_generation); | |
88 | GvSV(gv) = subgen; | |
89 | } | |
6d4a7be2 | 90 | } |
46e4b22b | 91 | if (hv) { |
6d4a7be2 | 92 | SV** svp = AvARRAY(av); |
93965878 NIS |
93 | /* NOTE: No support for tied ISA */ |
94 | I32 items = AvFILLp(av) + 1; | |
6d4a7be2 PP |
95 | while (items--) { |
96 | SV* sv = *svp++; | |
97 | HV* basestash = gv_stashsv(sv, FALSE); | |
98 | if (!basestash) { | |
599cee73 | 99 | if (ckWARN(WARN_MISC)) |
9014280d | 100 | Perl_warner(aTHX_ packWARN(WARN_SYNTAX), |
35c1215d NC |
101 | "Can't locate package %"SVf" for @%s::ISA", |
102 | sv, HvNAME(stash)); | |
6d4a7be2 PP |
103 | continue; |
104 | } | |
301daebc MS |
105 | if (&PL_sv_yes == isa_lookup(basestash, name, name_stash, |
106 | len, level + 1)) { | |
3280af22 NIS |
107 | (void)hv_store(hv,name,len,&PL_sv_yes,0); |
108 | return &PL_sv_yes; | |
6d4a7be2 PP |
109 | } |
110 | } | |
3280af22 | 111 | (void)hv_store(hv,name,len,&PL_sv_no,0); |
6d4a7be2 PP |
112 | } |
113 | } | |
114 | ||
e09f3e01 | 115 | return boolSV(strEQ(name, "UNIVERSAL")); |
6d4a7be2 PP |
116 | } |
117 | ||
954c1994 | 118 | /* |
ccfc67b7 JH |
119 | =head1 SV Manipulation Functions |
120 | ||
954c1994 GS |
121 | =for apidoc sv_derived_from |
122 | ||
123 | Returns a boolean indicating whether the SV is derived from the specified | |
124 | class. This is the function that implements C<UNIVERSAL::isa>. It works | |
125 | for class names as well as for objects. | |
126 | ||
127 | =cut | |
128 | */ | |
129 | ||
55497cff | 130 | bool |
864dbfa3 | 131 | Perl_sv_derived_from(pTHX_ SV *sv, const char *name) |
55497cff | 132 | { |
55497cff PP |
133 | char *type; |
134 | HV *stash; | |
301daebc | 135 | HV *name_stash; |
46e4b22b | 136 | |
55497cff PP |
137 | stash = Nullhv; |
138 | type = Nullch; | |
46e4b22b | 139 | |
55497cff PP |
140 | if (SvGMAGICAL(sv)) |
141 | mg_get(sv) ; | |
142 | ||
143 | if (SvROK(sv)) { | |
144 | sv = SvRV(sv); | |
145 | type = sv_reftype(sv,0); | |
46e4b22b | 146 | if (SvOBJECT(sv)) |
55497cff PP |
147 | stash = SvSTASH(sv); |
148 | } | |
149 | else { | |
150 | stash = gv_stashsv(sv, FALSE); | |
151 | } | |
46e4b22b | 152 | |
301daebc MS |
153 | name_stash = gv_stashpv(name, FALSE); |
154 | ||
55497cff | 155 | return (type && strEQ(type,name)) || |
301daebc MS |
156 | (stash && isa_lookup(stash, name, name_stash, strlen(name), 0) |
157 | == &PL_sv_yes) | |
55497cff PP |
158 | ? TRUE |
159 | : FALSE ; | |
55497cff PP |
160 | } |
161 | ||
1b026014 NIS |
162 | #include "XSUB.h" |
163 | ||
acfe0abc GS |
164 | void XS_UNIVERSAL_isa(pTHX_ CV *cv); |
165 | void XS_UNIVERSAL_can(pTHX_ CV *cv); | |
166 | void XS_UNIVERSAL_VERSION(pTHX_ CV *cv); | |
439cb1c4 JP |
167 | XS(XS_version_new); |
168 | XS(XS_version_stringify); | |
169 | XS(XS_version_numify); | |
170 | XS(XS_version_vcmp); | |
171 | XS(XS_version_boolean); | |
172 | XS(XS_version_noop); | |
1b026014 NIS |
173 | XS(XS_utf8_valid); |
174 | XS(XS_utf8_encode); | |
175 | XS(XS_utf8_decode); | |
176 | XS(XS_utf8_upgrade); | |
177 | XS(XS_utf8_downgrade); | |
178 | XS(XS_utf8_unicode_to_native); | |
179 | XS(XS_utf8_native_to_unicode); | |
29569577 JH |
180 | XS(XS_Internals_SvREADONLY); |
181 | XS(XS_Internals_SvREFCNT); | |
f044d0d1 | 182 | XS(XS_Internals_hv_clear_placehold); |
39f7a870 | 183 | XS(XS_PerlIO_get_layers); |
0cb96387 GS |
184 | |
185 | void | |
186 | Perl_boot_core_UNIVERSAL(pTHX) | |
187 | { | |
188 | char *file = __FILE__; | |
189 | ||
190 | newXS("UNIVERSAL::isa", XS_UNIVERSAL_isa, file); | |
191 | newXS("UNIVERSAL::can", XS_UNIVERSAL_can, file); | |
192 | newXS("UNIVERSAL::VERSION", XS_UNIVERSAL_VERSION, file); | |
439cb1c4 | 193 | { |
ad63d80f JP |
194 | /* register the overloading (type 'A') magic */ |
195 | PL_amagic_generation++; | |
439cb1c4 | 196 | /* Make it findable via fetchmethod */ |
be2ebcad | 197 | newXS("version::()", XS_version_noop, file); |
439cb1c4 JP |
198 | newXS("version::new", XS_version_new, file); |
199 | newXS("version::(\"\"", XS_version_stringify, file); | |
200 | newXS("version::stringify", XS_version_stringify, file); | |
201 | newXS("version::(0+", XS_version_numify, file); | |
202 | newXS("version::numify", XS_version_numify, file); | |
203 | newXS("version::(cmp", XS_version_vcmp, file); | |
204 | newXS("version::(<=>", XS_version_vcmp, file); | |
205 | newXS("version::vcmp", XS_version_vcmp, file); | |
206 | newXS("version::(bool", XS_version_boolean, file); | |
207 | newXS("version::boolean", XS_version_boolean, file); | |
208 | newXS("version::(nomethod", XS_version_noop, file); | |
209 | newXS("version::noop", XS_version_noop, file); | |
210 | } | |
1b026014 NIS |
211 | newXS("utf8::valid", XS_utf8_valid, file); |
212 | newXS("utf8::encode", XS_utf8_encode, file); | |
213 | newXS("utf8::decode", XS_utf8_decode, file); | |
214 | newXS("utf8::upgrade", XS_utf8_upgrade, file); | |
215 | newXS("utf8::downgrade", XS_utf8_downgrade, file); | |
216 | newXS("utf8::native_to_unicode", XS_utf8_native_to_unicode, file); | |
217 | newXS("utf8::unicode_to_native", XS_utf8_unicode_to_native, file); | |
29569577 JH |
218 | newXSproto("Internals::SvREADONLY",XS_Internals_SvREADONLY, file, "\\[$%@];$"); |
219 | newXSproto("Internals::SvREFCNT",XS_Internals_SvREFCNT, file, "\\[$%@];$"); | |
dfd4ef2f | 220 | newXSproto("Internals::hv_clear_placeholders", |
f044d0d1 | 221 | XS_Internals_hv_clear_placehold, file, "\\%"); |
39f7a870 | 222 | newXS("PerlIO::get_layers", XS_PerlIO_get_layers, file); |
0cb96387 GS |
223 | } |
224 | ||
55497cff | 225 | |
6d4a7be2 PP |
226 | XS(XS_UNIVERSAL_isa) |
227 | { | |
228 | dXSARGS; | |
55497cff PP |
229 | SV *sv; |
230 | char *name; | |
2d8e6c8d | 231 | STRLEN n_a; |
6d4a7be2 PP |
232 | |
233 | if (items != 2) | |
cea2e8a9 | 234 | Perl_croak(aTHX_ "Usage: UNIVERSAL::isa(reference, kind)"); |
6d4a7be2 PP |
235 | |
236 | sv = ST(0); | |
f8f70380 | 237 | |
d3f7f2b2 GS |
238 | if (SvGMAGICAL(sv)) |
239 | mg_get(sv); | |
240 | ||
253ecd6d RGS |
241 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)) |
242 | || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv)))) | |
f8f70380 GS |
243 | XSRETURN_UNDEF; |
244 | ||
2d8e6c8d | 245 | name = (char *)SvPV(ST(1),n_a); |
6d4a7be2 | 246 | |
54310121 | 247 | ST(0) = boolSV(sv_derived_from(sv, name)); |
6d4a7be2 PP |
248 | XSRETURN(1); |
249 | } | |
250 | ||
6d4a7be2 PP |
251 | XS(XS_UNIVERSAL_can) |
252 | { | |
253 | dXSARGS; | |
254 | SV *sv; | |
255 | char *name; | |
256 | SV *rv; | |
6f08146e | 257 | HV *pkg = NULL; |
2d8e6c8d | 258 | STRLEN n_a; |
6d4a7be2 PP |
259 | |
260 | if (items != 2) | |
cea2e8a9 | 261 | Perl_croak(aTHX_ "Usage: UNIVERSAL::can(object-ref, method)"); |
6d4a7be2 PP |
262 | |
263 | sv = ST(0); | |
f8f70380 | 264 | |
d3f7f2b2 GS |
265 | if (SvGMAGICAL(sv)) |
266 | mg_get(sv); | |
267 | ||
253ecd6d RGS |
268 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)) |
269 | || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv)))) | |
f8f70380 GS |
270 | XSRETURN_UNDEF; |
271 | ||
2d8e6c8d | 272 | name = (char *)SvPV(ST(1),n_a); |
3280af22 | 273 | rv = &PL_sv_undef; |
6d4a7be2 | 274 | |
46e4b22b | 275 | if (SvROK(sv)) { |
6f08146e | 276 | sv = (SV*)SvRV(sv); |
46e4b22b | 277 | if (SvOBJECT(sv)) |
6f08146e NIS |
278 | pkg = SvSTASH(sv); |
279 | } | |
280 | else { | |
281 | pkg = gv_stashsv(sv, FALSE); | |
282 | } | |
283 | ||
284 | if (pkg) { | |
dc848c6f PP |
285 | GV *gv = gv_fetchmethod_autoload(pkg, name, FALSE); |
286 | if (gv && isGV(gv)) | |
287 | rv = sv_2mortal(newRV((SV*)GvCV(gv))); | |
6d4a7be2 PP |
288 | } |
289 | ||
290 | ST(0) = rv; | |
291 | XSRETURN(1); | |
292 | } | |
293 | ||
6d4a7be2 PP |
294 | XS(XS_UNIVERSAL_VERSION) |
295 | { | |
296 | dXSARGS; | |
297 | HV *pkg; | |
298 | GV **gvp; | |
299 | GV *gv; | |
300 | SV *sv; | |
301 | char *undef; | |
302 | ||
1571675a | 303 | if (SvROK(ST(0))) { |
6d4a7be2 | 304 | sv = (SV*)SvRV(ST(0)); |
1571675a | 305 | if (!SvOBJECT(sv)) |
cea2e8a9 | 306 | Perl_croak(aTHX_ "Cannot find version of an unblessed reference"); |
6d4a7be2 PP |
307 | pkg = SvSTASH(sv); |
308 | } | |
309 | else { | |
310 | pkg = gv_stashsv(ST(0), FALSE); | |
311 | } | |
312 | ||
313 | gvp = pkg ? (GV**)hv_fetch(pkg,"VERSION",7,FALSE) : Null(GV**); | |
314 | ||
d4bea2fb | 315 | if (gvp && isGV(gv = *gvp) && SvOK(sv = GvSV(gv))) { |
6d4a7be2 PP |
316 | SV *nsv = sv_newmortal(); |
317 | sv_setsv(nsv, sv); | |
318 | sv = nsv; | |
319 | undef = Nullch; | |
320 | } | |
321 | else { | |
3280af22 | 322 | sv = (SV*)&PL_sv_undef; |
6d4a7be2 PP |
323 | undef = "(undef)"; |
324 | } | |
325 | ||
1571675a GS |
326 | if (items > 1) { |
327 | STRLEN len; | |
328 | SV *req = ST(1); | |
329 | ||
62658f4d PM |
330 | if (undef) { |
331 | if (pkg) | |
332 | Perl_croak(aTHX_ | |
333 | "%s does not define $%s::VERSION--version check failed", | |
334 | HvNAME(pkg), HvNAME(pkg)); | |
335 | else { | |
336 | char *str = SvPVx(ST(0), len); | |
337 | ||
338 | Perl_croak(aTHX_ | |
339 | "%s defines neither package nor VERSION--version check failed", str); | |
340 | } | |
341 | } | |
ad63d80f JP |
342 | if ( !sv_derived_from(sv, "version")) |
343 | sv = new_version(sv); | |
344 | ||
345 | if ( !sv_derived_from(req, "version")) | |
346 | req = new_version(req); | |
1571675a | 347 | |
ad63d80f | 348 | if ( vcmp( SvRV(req), SvRV(sv) ) > 0 ) |
e3feee4e RB |
349 | Perl_croak(aTHX_ |
350 | "%s version %"SVf" required--this is only version %"SVf, | |
0773b1f0 | 351 | HvNAME(pkg), req, sv); |
2d8e6c8d | 352 | } |
6d4a7be2 PP |
353 | |
354 | ST(0) = sv; | |
355 | ||
356 | XSRETURN(1); | |
357 | } | |
358 | ||
439cb1c4 JP |
359 | XS(XS_version_new) |
360 | { | |
361 | dXSARGS; | |
129318bd | 362 | if (items > 3) |
439cb1c4 JP |
363 | Perl_croak(aTHX_ "Usage: version::new(class, version)"); |
364 | SP -= items; | |
365 | { | |
366 | /* char * class = (char *)SvPV_nolen(ST(0)); */ | |
129318bd JP |
367 | SV *version = ST(1); |
368 | if (items == 3 ) | |
369 | { | |
370 | char *vs = savepvn(SvPVX(ST(2)),SvCUR(ST(2))); | |
9be22fdc | 371 | version = Perl_newSVpvf(aTHX_ "v%s",vs); |
129318bd | 372 | } |
439cb1c4 | 373 | |
129318bd | 374 | PUSHs(new_version(version)); |
439cb1c4 JP |
375 | PUTBACK; |
376 | return; | |
377 | } | |
378 | } | |
379 | ||
380 | XS(XS_version_stringify) | |
381 | { | |
382 | dXSARGS; | |
383 | if (items < 1) | |
384 | Perl_croak(aTHX_ "Usage: version::stringify(lobj, ...)"); | |
385 | SP -= items; | |
386 | { | |
387 | SV * lobj; | |
388 | ||
389 | if (sv_derived_from(ST(0), "version")) { | |
390 | SV *tmp = SvRV(ST(0)); | |
391 | lobj = tmp; | |
392 | } | |
393 | else | |
ba329e04 | 394 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 JP |
395 | |
396 | { | |
ad63d80f | 397 | PUSHs(vstringify(lobj)); |
439cb1c4 JP |
398 | } |
399 | ||
400 | PUTBACK; | |
401 | return; | |
402 | } | |
403 | } | |
404 | ||
405 | XS(XS_version_numify) | |
406 | { | |
407 | dXSARGS; | |
408 | if (items < 1) | |
409 | Perl_croak(aTHX_ "Usage: version::numify(lobj, ...)"); | |
410 | SP -= items; | |
411 | { | |
412 | SV * lobj; | |
413 | ||
414 | if (sv_derived_from(ST(0), "version")) { | |
415 | SV *tmp = SvRV(ST(0)); | |
416 | lobj = tmp; | |
417 | } | |
418 | else | |
ba329e04 | 419 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 JP |
420 | |
421 | { | |
ad63d80f | 422 | PUSHs(vnumify(lobj)); |
439cb1c4 JP |
423 | } |
424 | ||
425 | PUTBACK; | |
426 | return; | |
427 | } | |
428 | } | |
429 | ||
430 | XS(XS_version_vcmp) | |
431 | { | |
432 | dXSARGS; | |
433 | if (items < 1) | |
434 | Perl_croak(aTHX_ "Usage: version::vcmp(lobj, ...)"); | |
435 | SP -= items; | |
436 | { | |
437 | SV * lobj; | |
438 | ||
439 | if (sv_derived_from(ST(0), "version")) { | |
440 | SV *tmp = SvRV(ST(0)); | |
441 | lobj = tmp; | |
442 | } | |
443 | else | |
ba329e04 | 444 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 JP |
445 | |
446 | { | |
447 | SV *rs; | |
448 | SV *rvs; | |
449 | SV * robj = ST(1); | |
450 | IV swap = (IV)SvIV(ST(2)); | |
451 | ||
452 | if ( ! sv_derived_from(robj, "version") ) | |
453 | { | |
454 | robj = new_version(robj); | |
455 | } | |
456 | rvs = SvRV(robj); | |
457 | ||
458 | if ( swap ) | |
459 | { | |
ad63d80f | 460 | rs = newSViv(vcmp(rvs,lobj)); |
439cb1c4 JP |
461 | } |
462 | else | |
463 | { | |
ad63d80f | 464 | rs = newSViv(vcmp(lobj,rvs)); |
439cb1c4 JP |
465 | } |
466 | ||
467 | PUSHs(rs); | |
468 | } | |
469 | ||
470 | PUTBACK; | |
471 | return; | |
472 | } | |
473 | } | |
474 | ||
475 | XS(XS_version_boolean) | |
476 | { | |
477 | dXSARGS; | |
478 | if (items < 1) | |
479 | Perl_croak(aTHX_ "Usage: version::boolean(lobj, ...)"); | |
480 | SP -= items; | |
481 | { | |
482 | SV * lobj; | |
483 | ||
484 | if (sv_derived_from(ST(0), "version")) { | |
485 | SV *tmp = SvRV(ST(0)); | |
486 | lobj = tmp; | |
487 | } | |
488 | else | |
ba329e04 | 489 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 JP |
490 | |
491 | { | |
492 | SV *rs; | |
ad63d80f | 493 | rs = newSViv( vcmp(lobj,new_version(newSVpvn("0",1))) ); |
439cb1c4 JP |
494 | PUSHs(rs); |
495 | } | |
496 | ||
497 | PUTBACK; | |
498 | return; | |
499 | } | |
500 | } | |
501 | ||
502 | XS(XS_version_noop) | |
503 | { | |
504 | dXSARGS; | |
505 | if (items < 1) | |
506 | Perl_croak(aTHX_ "Usage: version::noop(lobj, ...)"); | |
507 | { | |
508 | SV * lobj; | |
509 | ||
510 | if (sv_derived_from(ST(0), "version")) { | |
511 | SV *tmp = SvRV(ST(0)); | |
512 | lobj = tmp; | |
513 | } | |
514 | else | |
ba329e04 | 515 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 JP |
516 | |
517 | { | |
ba329e04 | 518 | Perl_croak(aTHX_ "operation not supported with version object"); |
439cb1c4 JP |
519 | } |
520 | ||
521 | } | |
522 | XSRETURN_EMPTY; | |
523 | } | |
524 | ||
1b026014 NIS |
525 | XS(XS_utf8_valid) |
526 | { | |
527 | dXSARGS; | |
528 | if (items != 1) | |
529 | Perl_croak(aTHX_ "Usage: utf8::valid(sv)"); | |
530 | { | |
531 | SV * sv = ST(0); | |
532 | { | |
533 | STRLEN len; | |
534 | char *s = SvPV(sv,len); | |
535 | if (!SvUTF8(sv) || is_utf8_string((U8*)s,len)) | |
536 | XSRETURN_YES; | |
537 | else | |
538 | XSRETURN_NO; | |
539 | } | |
540 | } | |
541 | XSRETURN_EMPTY; | |
542 | } | |
543 | ||
544 | XS(XS_utf8_encode) | |
545 | { | |
546 | dXSARGS; | |
547 | if (items != 1) | |
548 | Perl_croak(aTHX_ "Usage: utf8::encode(sv)"); | |
549 | { | |
550 | SV * sv = ST(0); | |
551 | ||
552 | sv_utf8_encode(sv); | |
553 | } | |
554 | XSRETURN_EMPTY; | |
555 | } | |
556 | ||
557 | XS(XS_utf8_decode) | |
558 | { | |
559 | dXSARGS; | |
560 | if (items != 1) | |
561 | Perl_croak(aTHX_ "Usage: utf8::decode(sv)"); | |
562 | { | |
563 | SV * sv = ST(0); | |
564 | bool RETVAL; | |
565 | ||
566 | RETVAL = sv_utf8_decode(sv); | |
567 | ST(0) = boolSV(RETVAL); | |
568 | sv_2mortal(ST(0)); | |
569 | } | |
570 | XSRETURN(1); | |
571 | } | |
572 | ||
573 | XS(XS_utf8_upgrade) | |
574 | { | |
575 | dXSARGS; | |
576 | if (items != 1) | |
577 | Perl_croak(aTHX_ "Usage: utf8::upgrade(sv)"); | |
578 | { | |
579 | SV * sv = ST(0); | |
580 | STRLEN RETVAL; | |
581 | dXSTARG; | |
582 | ||
583 | RETVAL = sv_utf8_upgrade(sv); | |
584 | XSprePUSH; PUSHi((IV)RETVAL); | |
585 | } | |
586 | XSRETURN(1); | |
587 | } | |
588 | ||
589 | XS(XS_utf8_downgrade) | |
590 | { | |
591 | dXSARGS; | |
592 | if (items < 1 || items > 2) | |
593 | Perl_croak(aTHX_ "Usage: utf8::downgrade(sv, failok=0)"); | |
594 | { | |
595 | SV * sv = ST(0); | |
596 | bool failok; | |
597 | bool RETVAL; | |
598 | ||
599 | if (items < 2) | |
600 | failok = 0; | |
601 | else { | |
602 | failok = (int)SvIV(ST(1)); | |
603 | } | |
604 | ||
605 | RETVAL = sv_utf8_downgrade(sv, failok); | |
606 | ST(0) = boolSV(RETVAL); | |
607 | sv_2mortal(ST(0)); | |
608 | } | |
609 | XSRETURN(1); | |
610 | } | |
611 | ||
612 | XS(XS_utf8_native_to_unicode) | |
613 | { | |
614 | dXSARGS; | |
615 | UV uv = SvUV(ST(0)); | |
b7953727 JH |
616 | |
617 | if (items > 1) | |
618 | Perl_croak(aTHX_ "Usage: utf8::native_to_unicode(sv)"); | |
619 | ||
1b026014 NIS |
620 | ST(0) = sv_2mortal(newSViv(NATIVE_TO_UNI(uv))); |
621 | XSRETURN(1); | |
622 | } | |
623 | ||
624 | XS(XS_utf8_unicode_to_native) | |
625 | { | |
626 | dXSARGS; | |
627 | UV uv = SvUV(ST(0)); | |
b7953727 JH |
628 | |
629 | if (items > 1) | |
630 | Perl_croak(aTHX_ "Usage: utf8::unicode_to_native(sv)"); | |
631 | ||
1b026014 NIS |
632 | ST(0) = sv_2mortal(newSViv(UNI_TO_NATIVE(uv))); |
633 | XSRETURN(1); | |
634 | } | |
635 | ||
14a976d6 | 636 | XS(XS_Internals_SvREADONLY) /* This is dangerous stuff. */ |
29569577 JH |
637 | { |
638 | dXSARGS; | |
639 | SV *sv = SvRV(ST(0)); | |
640 | if (items == 1) { | |
641 | if (SvREADONLY(sv)) | |
642 | XSRETURN_YES; | |
643 | else | |
644 | XSRETURN_NO; | |
645 | } | |
646 | else if (items == 2) { | |
647 | if (SvTRUE(ST(1))) { | |
648 | SvREADONLY_on(sv); | |
649 | XSRETURN_YES; | |
650 | } | |
651 | else { | |
14a976d6 | 652 | /* I hope you really know what you are doing. */ |
29569577 JH |
653 | SvREADONLY_off(sv); |
654 | XSRETURN_NO; | |
655 | } | |
656 | } | |
14a976d6 | 657 | XSRETURN_UNDEF; /* Can't happen. */ |
29569577 JH |
658 | } |
659 | ||
14a976d6 | 660 | XS(XS_Internals_SvREFCNT) /* This is dangerous stuff. */ |
29569577 JH |
661 | { |
662 | dXSARGS; | |
663 | SV *sv = SvRV(ST(0)); | |
664 | if (items == 1) | |
14a976d6 | 665 | XSRETURN_IV(SvREFCNT(sv) - 1); /* Minus the ref created for us. */ |
29569577 | 666 | else if (items == 2) { |
14a976d6 | 667 | /* I hope you really know what you are doing. */ |
29569577 JH |
668 | SvREFCNT(sv) = SvIV(ST(1)); |
669 | XSRETURN_IV(SvREFCNT(sv)); | |
670 | } | |
14a976d6 | 671 | XSRETURN_UNDEF; /* Can't happen. */ |
29569577 JH |
672 | } |
673 | ||
dfd4ef2f NC |
674 | /* Maybe this should return the number of placeholders found in scalar context, |
675 | and a list of them in list context. */ | |
f044d0d1 | 676 | XS(XS_Internals_hv_clear_placehold) |
dfd4ef2f NC |
677 | { |
678 | dXSARGS; | |
679 | HV *hv = (HV *) SvRV(ST(0)); | |
680 | ||
681 | /* I don't care how many parameters were passed in, but I want to avoid | |
682 | the unused variable warning. */ | |
683 | ||
eb160463 | 684 | items = (I32)HvPLACEHOLDERS(hv); |
dfd4ef2f NC |
685 | |
686 | if (items) { | |
687 | HE *entry; | |
688 | I32 riter = HvRITER(hv); | |
689 | HE *eiter = HvEITER(hv); | |
690 | hv_iterinit(hv); | |
fe7bca90 NC |
691 | /* This may look suboptimal with the items *after* the iternext, but |
692 | it's quite deliberate. We only get here with items==0 if we've | |
693 | just deleted the last placeholder in the hash. If we've just done | |
694 | that then it means that the hash is in lazy delete mode, and the | |
695 | HE is now only referenced in our iterator. If we just quit the loop | |
696 | and discarded our iterator then the HE leaks. So we do the && the | |
697 | other way to ensure iternext is called just one more time, which | |
698 | has the side effect of triggering the lazy delete. */ | |
699 | while ((entry = hv_iternext_flags(hv, HV_ITERNEXT_WANTPLACEHOLDERS)) | |
700 | && items) { | |
dfd4ef2f NC |
701 | SV *val = hv_iterval(hv, entry); |
702 | ||
703 | if (val == &PL_sv_undef) { | |
704 | ||
705 | /* It seems that I have to go back in the front of the hash | |
706 | API to delete a hash, even though I have a HE structure | |
707 | pointing to the very entry I want to delete, and could hold | |
708 | onto the previous HE that points to it. And it's easier to | |
709 | go in with SVs as I can then specify the precomputed hash, | |
710 | and don't have fun and games with utf8 keys. */ | |
711 | SV *key = hv_iterkeysv(entry); | |
712 | ||
713 | hv_delete_ent (hv, key, G_DISCARD, HeHASH(entry)); | |
714 | items--; | |
715 | } | |
716 | } | |
717 | HvRITER(hv) = riter; | |
718 | HvEITER(hv) = eiter; | |
719 | } | |
720 | ||
721 | XSRETURN(0); | |
722 | } | |
39f7a870 JH |
723 | |
724 | XS(XS_PerlIO_get_layers) | |
725 | { | |
726 | dXSARGS; | |
727 | if (items < 1 || items % 2 == 0) | |
728 | Perl_croak(aTHX_ "Usage: PerlIO_get_layers(filehandle[,args])"); | |
729 | { | |
730 | SV * sv; | |
731 | GV * gv; | |
732 | IO * io; | |
733 | bool input = TRUE; | |
734 | bool details = FALSE; | |
735 | ||
736 | if (items > 1) { | |
737 | SV **popuntil = MARK + 1; | |
738 | SV **svp; | |
739 | ||
740 | for (svp = MARK + 2; svp <= SP; svp += 2) { | |
741 | SV **varp = svp; | |
742 | SV **valp = svp + 1; | |
743 | STRLEN klen; | |
744 | char *key = SvPV(*varp, klen); | |
745 | ||
746 | switch (*key) { | |
747 | case 'i': | |
748 | if (klen == 5 && memEQ(key, "input", 5)) { | |
749 | input = SvTRUE(*valp); | |
750 | break; | |
751 | } | |
752 | goto fail; | |
753 | case 'o': | |
754 | if (klen == 6 && memEQ(key, "output", 6)) { | |
755 | input = !SvTRUE(*valp); | |
756 | break; | |
757 | } | |
758 | goto fail; | |
759 | case 'd': | |
760 | if (klen == 7 && memEQ(key, "details", 7)) { | |
761 | details = SvTRUE(*valp); | |
762 | break; | |
763 | } | |
764 | goto fail; | |
765 | default: | |
766 | fail: | |
767 | Perl_croak(aTHX_ | |
768 | "get_layers: unknown argument '%s'", | |
769 | key); | |
770 | } | |
771 | } | |
772 | ||
773 | SP -= (items - 1); | |
774 | } | |
775 | ||
776 | sv = POPs; | |
777 | gv = (GV*)sv; | |
778 | ||
779 | if (!isGV(sv)) { | |
780 | if (SvROK(sv) && isGV(SvRV(sv))) | |
781 | gv = (GV*)SvRV(sv); | |
782 | else | |
783 | gv = gv_fetchpv(SvPVX(sv), FALSE, SVt_PVIO); | |
784 | } | |
785 | ||
786 | if (gv && (io = GvIO(gv))) { | |
787 | dTARGET; | |
788 | AV* av = PerlIO_get_layers(aTHX_ input ? | |
789 | IoIFP(io) : IoOFP(io)); | |
790 | I32 i; | |
791 | I32 last = av_len(av); | |
792 | I32 nitem = 0; | |
793 | ||
794 | for (i = last; i >= 0; i -= 3) { | |
795 | SV **namsvp; | |
796 | SV **argsvp; | |
797 | SV **flgsvp; | |
798 | bool namok, argok, flgok; | |
799 | ||
800 | namsvp = av_fetch(av, i - 2, FALSE); | |
801 | argsvp = av_fetch(av, i - 1, FALSE); | |
802 | flgsvp = av_fetch(av, i, FALSE); | |
803 | ||
804 | namok = namsvp && *namsvp && SvPOK(*namsvp); | |
805 | argok = argsvp && *argsvp && SvPOK(*argsvp); | |
806 | flgok = flgsvp && *flgsvp && SvIOK(*flgsvp); | |
807 | ||
808 | if (details) { | |
809 | XPUSHs(namok ? | |
810 | newSVpv(SvPVX(*namsvp), 0) : &PL_sv_undef); | |
811 | XPUSHs(argok ? | |
812 | newSVpv(SvPVX(*argsvp), 0) : &PL_sv_undef); | |
813 | if (flgok) | |
814 | XPUSHi(SvIVX(*flgsvp)); | |
815 | else | |
816 | XPUSHs(&PL_sv_undef); | |
817 | nitem += 3; | |
818 | } | |
819 | else { | |
820 | if (namok && argok) | |
821 | XPUSHs(Perl_newSVpvf(aTHX_ "%"SVf"(%"SVf")", | |
822 | *namsvp, *argsvp)); | |
823 | else if (namok) | |
824 | XPUSHs(Perl_newSVpvf(aTHX_ "%"SVf, *namsvp)); | |
825 | else | |
826 | XPUSHs(&PL_sv_undef); | |
827 | nitem++; | |
828 | if (flgok) { | |
829 | IV flags = SvIVX(*flgsvp); | |
830 | ||
831 | if (flags & PERLIO_F_UTF8) { | |
832 | XPUSHs(newSVpvn("utf8", 4)); | |
833 | nitem++; | |
834 | } | |
835 | } | |
836 | } | |
837 | } | |
838 | ||
839 | SvREFCNT_dec(av); | |
840 | ||
841 | XSRETURN(nitem); | |
842 | } | |
843 | } | |
844 | ||
845 | XSRETURN(0); | |
846 | } | |
847 |