Commit | Line | Data |
d6376244 |
1 | /* universal.c |
2 | * |
4c79ee7a |
3 | * Copyright (c) 1997-2003, Larry Wall |
d6376244 |
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 |
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 |
20 | #ifdef USE_PERLIO |
21 | #include "perliol.h" /* For the PERLIO_F_XXX */ |
22 | #endif |
23 | |
6d4a7be2 |
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 |
30 | S_isa_lookup(pTHX_ HV *stash, const char *name, HV* name_stash, |
31 | int len, int level) |
6d4a7be2 |
32 | { |
33 | AV* av; |
34 | GV* gv; |
35 | GV** gvp; |
36 | HV* hv = Nullhv; |
46e4b22b |
37 | SV* subgen = Nullsv; |
6d4a7be2 |
38 | |
301daebc |
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 |
46 | |
47 | if (level > 100) |
46e4b22b |
48 | Perl_croak(aTHX_ "Recursive inheritance detected in package '%s'", |
49 | HvNAME(stash)); |
6d4a7be2 |
50 | |
51 | gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, FALSE); |
52 | |
46e4b22b |
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 |
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 |
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 |
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 |
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 |
93 | /* NOTE: No support for tied ISA */ |
94 | I32 items = AvFILLp(av) + 1; |
6d4a7be2 |
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 |
101 | "Can't locate package %"SVf" for @%s::ISA", |
102 | sv, HvNAME(stash)); |
6d4a7be2 |
103 | continue; |
104 | } |
301daebc |
105 | if (&PL_sv_yes == isa_lookup(basestash, name, name_stash, |
106 | len, level + 1)) { |
3280af22 |
107 | (void)hv_store(hv,name,len,&PL_sv_yes,0); |
108 | return &PL_sv_yes; |
6d4a7be2 |
109 | } |
110 | } |
3280af22 |
111 | (void)hv_store(hv,name,len,&PL_sv_no,0); |
6d4a7be2 |
112 | } |
113 | } |
114 | |
e09f3e01 |
115 | return boolSV(strEQ(name, "UNIVERSAL")); |
6d4a7be2 |
116 | } |
117 | |
954c1994 |
118 | /* |
ccfc67b7 |
119 | =head1 SV Manipulation Functions |
120 | |
954c1994 |
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 |
133 | char *type; |
134 | HV *stash; |
301daebc |
135 | HV *name_stash; |
46e4b22b |
136 | |
55497cff |
137 | stash = Nullhv; |
138 | type = Nullch; |
46e4b22b |
139 | |
55497cff |
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 |
147 | stash = SvSTASH(sv); |
148 | } |
149 | else { |
150 | stash = gv_stashsv(sv, FALSE); |
151 | } |
46e4b22b |
152 | |
301daebc |
153 | name_stash = gv_stashpv(name, FALSE); |
154 | |
55497cff |
155 | return (type && strEQ(type,name)) || |
301daebc |
156 | (stash && isa_lookup(stash, name, name_stash, strlen(name), 0) |
157 | == &PL_sv_yes) |
55497cff |
158 | ? TRUE |
159 | : FALSE ; |
55497cff |
160 | } |
161 | |
1b026014 |
162 | #include "XSUB.h" |
163 | |
acfe0abc |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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, "\\%"); |
9d569fce |
222 | newXSproto("PerlIO::get_layers", |
223 | XS_PerlIO_get_layers, file, "*;@"); |
0cb96387 |
224 | } |
225 | |
55497cff |
226 | |
6d4a7be2 |
227 | XS(XS_UNIVERSAL_isa) |
228 | { |
229 | dXSARGS; |
55497cff |
230 | SV *sv; |
231 | char *name; |
2d8e6c8d |
232 | STRLEN n_a; |
6d4a7be2 |
233 | |
234 | if (items != 2) |
cea2e8a9 |
235 | Perl_croak(aTHX_ "Usage: UNIVERSAL::isa(reference, kind)"); |
6d4a7be2 |
236 | |
237 | sv = ST(0); |
f8f70380 |
238 | |
d3f7f2b2 |
239 | if (SvGMAGICAL(sv)) |
240 | mg_get(sv); |
241 | |
253ecd6d |
242 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)) |
243 | || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv)))) |
f8f70380 |
244 | XSRETURN_UNDEF; |
245 | |
2d8e6c8d |
246 | name = (char *)SvPV(ST(1),n_a); |
6d4a7be2 |
247 | |
54310121 |
248 | ST(0) = boolSV(sv_derived_from(sv, name)); |
6d4a7be2 |
249 | XSRETURN(1); |
250 | } |
251 | |
6d4a7be2 |
252 | XS(XS_UNIVERSAL_can) |
253 | { |
254 | dXSARGS; |
255 | SV *sv; |
256 | char *name; |
257 | SV *rv; |
6f08146e |
258 | HV *pkg = NULL; |
2d8e6c8d |
259 | STRLEN n_a; |
6d4a7be2 |
260 | |
261 | if (items != 2) |
cea2e8a9 |
262 | Perl_croak(aTHX_ "Usage: UNIVERSAL::can(object-ref, method)"); |
6d4a7be2 |
263 | |
264 | sv = ST(0); |
f8f70380 |
265 | |
d3f7f2b2 |
266 | if (SvGMAGICAL(sv)) |
267 | mg_get(sv); |
268 | |
253ecd6d |
269 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)) |
270 | || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv)))) |
f8f70380 |
271 | XSRETURN_UNDEF; |
272 | |
2d8e6c8d |
273 | name = (char *)SvPV(ST(1),n_a); |
3280af22 |
274 | rv = &PL_sv_undef; |
6d4a7be2 |
275 | |
46e4b22b |
276 | if (SvROK(sv)) { |
6f08146e |
277 | sv = (SV*)SvRV(sv); |
46e4b22b |
278 | if (SvOBJECT(sv)) |
6f08146e |
279 | pkg = SvSTASH(sv); |
280 | } |
281 | else { |
282 | pkg = gv_stashsv(sv, FALSE); |
283 | } |
284 | |
285 | if (pkg) { |
dc848c6f |
286 | GV *gv = gv_fetchmethod_autoload(pkg, name, FALSE); |
287 | if (gv && isGV(gv)) |
288 | rv = sv_2mortal(newRV((SV*)GvCV(gv))); |
6d4a7be2 |
289 | } |
290 | |
291 | ST(0) = rv; |
292 | XSRETURN(1); |
293 | } |
294 | |
6d4a7be2 |
295 | XS(XS_UNIVERSAL_VERSION) |
296 | { |
297 | dXSARGS; |
298 | HV *pkg; |
299 | GV **gvp; |
300 | GV *gv; |
301 | SV *sv; |
302 | char *undef; |
303 | |
1571675a |
304 | if (SvROK(ST(0))) { |
6d4a7be2 |
305 | sv = (SV*)SvRV(ST(0)); |
1571675a |
306 | if (!SvOBJECT(sv)) |
cea2e8a9 |
307 | Perl_croak(aTHX_ "Cannot find version of an unblessed reference"); |
6d4a7be2 |
308 | pkg = SvSTASH(sv); |
309 | } |
310 | else { |
311 | pkg = gv_stashsv(ST(0), FALSE); |
312 | } |
313 | |
314 | gvp = pkg ? (GV**)hv_fetch(pkg,"VERSION",7,FALSE) : Null(GV**); |
315 | |
d4bea2fb |
316 | if (gvp && isGV(gv = *gvp) && SvOK(sv = GvSV(gv))) { |
6d4a7be2 |
317 | SV *nsv = sv_newmortal(); |
318 | sv_setsv(nsv, sv); |
319 | sv = nsv; |
320 | undef = Nullch; |
321 | } |
322 | else { |
3280af22 |
323 | sv = (SV*)&PL_sv_undef; |
6d4a7be2 |
324 | undef = "(undef)"; |
325 | } |
326 | |
1571675a |
327 | if (items > 1) { |
328 | STRLEN len; |
329 | SV *req = ST(1); |
330 | |
62658f4d |
331 | if (undef) { |
332 | if (pkg) |
333 | Perl_croak(aTHX_ |
334 | "%s does not define $%s::VERSION--version check failed", |
335 | HvNAME(pkg), HvNAME(pkg)); |
336 | else { |
337 | char *str = SvPVx(ST(0), len); |
338 | |
339 | Perl_croak(aTHX_ |
340 | "%s defines neither package nor VERSION--version check failed", str); |
341 | } |
342 | } |
ad63d80f |
343 | if ( !sv_derived_from(sv, "version")) |
344 | sv = new_version(sv); |
345 | |
346 | if ( !sv_derived_from(req, "version")) |
347 | req = new_version(req); |
1571675a |
348 | |
ad63d80f |
349 | if ( vcmp( SvRV(req), SvRV(sv) ) > 0 ) |
e3feee4e |
350 | Perl_croak(aTHX_ |
351 | "%s version %"SVf" required--this is only version %"SVf, |
0773b1f0 |
352 | HvNAME(pkg), req, sv); |
2d8e6c8d |
353 | } |
6d4a7be2 |
354 | |
355 | ST(0) = sv; |
356 | |
357 | XSRETURN(1); |
358 | } |
359 | |
439cb1c4 |
360 | XS(XS_version_new) |
361 | { |
362 | dXSARGS; |
129318bd |
363 | if (items > 3) |
439cb1c4 |
364 | Perl_croak(aTHX_ "Usage: version::new(class, version)"); |
365 | SP -= items; |
366 | { |
367 | /* char * class = (char *)SvPV_nolen(ST(0)); */ |
129318bd |
368 | SV *version = ST(1); |
369 | if (items == 3 ) |
370 | { |
371 | char *vs = savepvn(SvPVX(ST(2)),SvCUR(ST(2))); |
9be22fdc |
372 | version = Perl_newSVpvf(aTHX_ "v%s",vs); |
129318bd |
373 | } |
439cb1c4 |
374 | |
129318bd |
375 | PUSHs(new_version(version)); |
439cb1c4 |
376 | PUTBACK; |
377 | return; |
378 | } |
379 | } |
380 | |
381 | XS(XS_version_stringify) |
382 | { |
383 | dXSARGS; |
384 | if (items < 1) |
385 | Perl_croak(aTHX_ "Usage: version::stringify(lobj, ...)"); |
386 | SP -= items; |
387 | { |
388 | SV * lobj; |
389 | |
390 | if (sv_derived_from(ST(0), "version")) { |
391 | SV *tmp = SvRV(ST(0)); |
392 | lobj = tmp; |
393 | } |
394 | else |
ba329e04 |
395 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 |
396 | |
397 | { |
ad63d80f |
398 | PUSHs(vstringify(lobj)); |
439cb1c4 |
399 | } |
400 | |
401 | PUTBACK; |
402 | return; |
403 | } |
404 | } |
405 | |
406 | XS(XS_version_numify) |
407 | { |
408 | dXSARGS; |
409 | if (items < 1) |
410 | Perl_croak(aTHX_ "Usage: version::numify(lobj, ...)"); |
411 | SP -= items; |
412 | { |
413 | SV * lobj; |
414 | |
415 | if (sv_derived_from(ST(0), "version")) { |
416 | SV *tmp = SvRV(ST(0)); |
417 | lobj = tmp; |
418 | } |
419 | else |
ba329e04 |
420 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 |
421 | |
422 | { |
ad63d80f |
423 | PUSHs(vnumify(lobj)); |
439cb1c4 |
424 | } |
425 | |
426 | PUTBACK; |
427 | return; |
428 | } |
429 | } |
430 | |
431 | XS(XS_version_vcmp) |
432 | { |
433 | dXSARGS; |
434 | if (items < 1) |
435 | Perl_croak(aTHX_ "Usage: version::vcmp(lobj, ...)"); |
436 | SP -= items; |
437 | { |
438 | SV * lobj; |
439 | |
440 | if (sv_derived_from(ST(0), "version")) { |
441 | SV *tmp = SvRV(ST(0)); |
442 | lobj = tmp; |
443 | } |
444 | else |
ba329e04 |
445 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 |
446 | |
447 | { |
448 | SV *rs; |
449 | SV *rvs; |
450 | SV * robj = ST(1); |
451 | IV swap = (IV)SvIV(ST(2)); |
452 | |
453 | if ( ! sv_derived_from(robj, "version") ) |
454 | { |
455 | robj = new_version(robj); |
456 | } |
457 | rvs = SvRV(robj); |
458 | |
459 | if ( swap ) |
460 | { |
ad63d80f |
461 | rs = newSViv(vcmp(rvs,lobj)); |
439cb1c4 |
462 | } |
463 | else |
464 | { |
ad63d80f |
465 | rs = newSViv(vcmp(lobj,rvs)); |
439cb1c4 |
466 | } |
467 | |
468 | PUSHs(rs); |
469 | } |
470 | |
471 | PUTBACK; |
472 | return; |
473 | } |
474 | } |
475 | |
476 | XS(XS_version_boolean) |
477 | { |
478 | dXSARGS; |
479 | if (items < 1) |
480 | Perl_croak(aTHX_ "Usage: version::boolean(lobj, ...)"); |
481 | SP -= items; |
482 | { |
483 | SV * lobj; |
484 | |
485 | if (sv_derived_from(ST(0), "version")) { |
486 | SV *tmp = SvRV(ST(0)); |
487 | lobj = tmp; |
488 | } |
489 | else |
ba329e04 |
490 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 |
491 | |
492 | { |
493 | SV *rs; |
ad63d80f |
494 | rs = newSViv( vcmp(lobj,new_version(newSVpvn("0",1))) ); |
439cb1c4 |
495 | PUSHs(rs); |
496 | } |
497 | |
498 | PUTBACK; |
499 | return; |
500 | } |
501 | } |
502 | |
503 | XS(XS_version_noop) |
504 | { |
505 | dXSARGS; |
506 | if (items < 1) |
507 | Perl_croak(aTHX_ "Usage: version::noop(lobj, ...)"); |
508 | { |
509 | SV * lobj; |
510 | |
511 | if (sv_derived_from(ST(0), "version")) { |
512 | SV *tmp = SvRV(ST(0)); |
513 | lobj = tmp; |
514 | } |
515 | else |
ba329e04 |
516 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 |
517 | |
518 | { |
ba329e04 |
519 | Perl_croak(aTHX_ "operation not supported with version object"); |
439cb1c4 |
520 | } |
521 | |
522 | } |
523 | XSRETURN_EMPTY; |
524 | } |
525 | |
1b026014 |
526 | XS(XS_utf8_valid) |
527 | { |
528 | dXSARGS; |
529 | if (items != 1) |
530 | Perl_croak(aTHX_ "Usage: utf8::valid(sv)"); |
531 | { |
532 | SV * sv = ST(0); |
533 | { |
534 | STRLEN len; |
535 | char *s = SvPV(sv,len); |
536 | if (!SvUTF8(sv) || is_utf8_string((U8*)s,len)) |
537 | XSRETURN_YES; |
538 | else |
539 | XSRETURN_NO; |
540 | } |
541 | } |
542 | XSRETURN_EMPTY; |
543 | } |
544 | |
545 | XS(XS_utf8_encode) |
546 | { |
547 | dXSARGS; |
548 | if (items != 1) |
549 | Perl_croak(aTHX_ "Usage: utf8::encode(sv)"); |
550 | { |
551 | SV * sv = ST(0); |
552 | |
553 | sv_utf8_encode(sv); |
554 | } |
555 | XSRETURN_EMPTY; |
556 | } |
557 | |
558 | XS(XS_utf8_decode) |
559 | { |
560 | dXSARGS; |
561 | if (items != 1) |
562 | Perl_croak(aTHX_ "Usage: utf8::decode(sv)"); |
563 | { |
564 | SV * sv = ST(0); |
565 | bool RETVAL; |
566 | |
567 | RETVAL = sv_utf8_decode(sv); |
568 | ST(0) = boolSV(RETVAL); |
569 | sv_2mortal(ST(0)); |
570 | } |
571 | XSRETURN(1); |
572 | } |
573 | |
574 | XS(XS_utf8_upgrade) |
575 | { |
576 | dXSARGS; |
577 | if (items != 1) |
578 | Perl_croak(aTHX_ "Usage: utf8::upgrade(sv)"); |
579 | { |
580 | SV * sv = ST(0); |
581 | STRLEN RETVAL; |
582 | dXSTARG; |
583 | |
584 | RETVAL = sv_utf8_upgrade(sv); |
585 | XSprePUSH; PUSHi((IV)RETVAL); |
586 | } |
587 | XSRETURN(1); |
588 | } |
589 | |
590 | XS(XS_utf8_downgrade) |
591 | { |
592 | dXSARGS; |
593 | if (items < 1 || items > 2) |
594 | Perl_croak(aTHX_ "Usage: utf8::downgrade(sv, failok=0)"); |
595 | { |
596 | SV * sv = ST(0); |
597 | bool failok; |
598 | bool RETVAL; |
599 | |
600 | if (items < 2) |
601 | failok = 0; |
602 | else { |
603 | failok = (int)SvIV(ST(1)); |
604 | } |
605 | |
606 | RETVAL = sv_utf8_downgrade(sv, failok); |
607 | ST(0) = boolSV(RETVAL); |
608 | sv_2mortal(ST(0)); |
609 | } |
610 | XSRETURN(1); |
611 | } |
612 | |
613 | XS(XS_utf8_native_to_unicode) |
614 | { |
615 | dXSARGS; |
616 | UV uv = SvUV(ST(0)); |
b7953727 |
617 | |
618 | if (items > 1) |
619 | Perl_croak(aTHX_ "Usage: utf8::native_to_unicode(sv)"); |
620 | |
1b026014 |
621 | ST(0) = sv_2mortal(newSViv(NATIVE_TO_UNI(uv))); |
622 | XSRETURN(1); |
623 | } |
624 | |
625 | XS(XS_utf8_unicode_to_native) |
626 | { |
627 | dXSARGS; |
628 | UV uv = SvUV(ST(0)); |
b7953727 |
629 | |
630 | if (items > 1) |
631 | Perl_croak(aTHX_ "Usage: utf8::unicode_to_native(sv)"); |
632 | |
1b026014 |
633 | ST(0) = sv_2mortal(newSViv(UNI_TO_NATIVE(uv))); |
634 | XSRETURN(1); |
635 | } |
636 | |
14a976d6 |
637 | XS(XS_Internals_SvREADONLY) /* This is dangerous stuff. */ |
29569577 |
638 | { |
639 | dXSARGS; |
640 | SV *sv = SvRV(ST(0)); |
641 | if (items == 1) { |
642 | if (SvREADONLY(sv)) |
643 | XSRETURN_YES; |
644 | else |
645 | XSRETURN_NO; |
646 | } |
647 | else if (items == 2) { |
648 | if (SvTRUE(ST(1))) { |
649 | SvREADONLY_on(sv); |
650 | XSRETURN_YES; |
651 | } |
652 | else { |
14a976d6 |
653 | /* I hope you really know what you are doing. */ |
29569577 |
654 | SvREADONLY_off(sv); |
655 | XSRETURN_NO; |
656 | } |
657 | } |
14a976d6 |
658 | XSRETURN_UNDEF; /* Can't happen. */ |
29569577 |
659 | } |
660 | |
14a976d6 |
661 | XS(XS_Internals_SvREFCNT) /* This is dangerous stuff. */ |
29569577 |
662 | { |
663 | dXSARGS; |
664 | SV *sv = SvRV(ST(0)); |
665 | if (items == 1) |
14a976d6 |
666 | XSRETURN_IV(SvREFCNT(sv) - 1); /* Minus the ref created for us. */ |
29569577 |
667 | else if (items == 2) { |
14a976d6 |
668 | /* I hope you really know what you are doing. */ |
29569577 |
669 | SvREFCNT(sv) = SvIV(ST(1)); |
670 | XSRETURN_IV(SvREFCNT(sv)); |
671 | } |
14a976d6 |
672 | XSRETURN_UNDEF; /* Can't happen. */ |
29569577 |
673 | } |
674 | |
dfd4ef2f |
675 | /* Maybe this should return the number of placeholders found in scalar context, |
676 | and a list of them in list context. */ |
f044d0d1 |
677 | XS(XS_Internals_hv_clear_placehold) |
dfd4ef2f |
678 | { |
679 | dXSARGS; |
680 | HV *hv = (HV *) SvRV(ST(0)); |
681 | |
682 | /* I don't care how many parameters were passed in, but I want to avoid |
683 | the unused variable warning. */ |
684 | |
eb160463 |
685 | items = (I32)HvPLACEHOLDERS(hv); |
dfd4ef2f |
686 | |
687 | if (items) { |
688 | HE *entry; |
689 | I32 riter = HvRITER(hv); |
690 | HE *eiter = HvEITER(hv); |
691 | hv_iterinit(hv); |
fe7bca90 |
692 | /* This may look suboptimal with the items *after* the iternext, but |
693 | it's quite deliberate. We only get here with items==0 if we've |
694 | just deleted the last placeholder in the hash. If we've just done |
695 | that then it means that the hash is in lazy delete mode, and the |
696 | HE is now only referenced in our iterator. If we just quit the loop |
697 | and discarded our iterator then the HE leaks. So we do the && the |
698 | other way to ensure iternext is called just one more time, which |
699 | has the side effect of triggering the lazy delete. */ |
700 | while ((entry = hv_iternext_flags(hv, HV_ITERNEXT_WANTPLACEHOLDERS)) |
701 | && items) { |
dfd4ef2f |
702 | SV *val = hv_iterval(hv, entry); |
703 | |
704 | if (val == &PL_sv_undef) { |
705 | |
706 | /* It seems that I have to go back in the front of the hash |
707 | API to delete a hash, even though I have a HE structure |
708 | pointing to the very entry I want to delete, and could hold |
709 | onto the previous HE that points to it. And it's easier to |
710 | go in with SVs as I can then specify the precomputed hash, |
711 | and don't have fun and games with utf8 keys. */ |
712 | SV *key = hv_iterkeysv(entry); |
713 | |
714 | hv_delete_ent (hv, key, G_DISCARD, HeHASH(entry)); |
715 | items--; |
716 | } |
717 | } |
718 | HvRITER(hv) = riter; |
719 | HvEITER(hv) = eiter; |
720 | } |
721 | |
722 | XSRETURN(0); |
723 | } |
39f7a870 |
724 | |
725 | XS(XS_PerlIO_get_layers) |
726 | { |
727 | dXSARGS; |
728 | if (items < 1 || items % 2 == 0) |
729 | Perl_croak(aTHX_ "Usage: PerlIO_get_layers(filehandle[,args])"); |
5fef3b4a |
730 | #ifdef USE_PERLIO |
39f7a870 |
731 | { |
732 | SV * sv; |
733 | GV * gv; |
734 | IO * io; |
735 | bool input = TRUE; |
736 | bool details = FALSE; |
737 | |
738 | if (items > 1) { |
739 | SV **popuntil = MARK + 1; |
740 | SV **svp; |
741 | |
742 | for (svp = MARK + 2; svp <= SP; svp += 2) { |
743 | SV **varp = svp; |
744 | SV **valp = svp + 1; |
745 | STRLEN klen; |
746 | char *key = SvPV(*varp, klen); |
747 | |
748 | switch (*key) { |
749 | case 'i': |
750 | if (klen == 5 && memEQ(key, "input", 5)) { |
751 | input = SvTRUE(*valp); |
752 | break; |
753 | } |
754 | goto fail; |
755 | case 'o': |
756 | if (klen == 6 && memEQ(key, "output", 6)) { |
757 | input = !SvTRUE(*valp); |
758 | break; |
759 | } |
760 | goto fail; |
761 | case 'd': |
762 | if (klen == 7 && memEQ(key, "details", 7)) { |
763 | details = SvTRUE(*valp); |
764 | break; |
765 | } |
766 | goto fail; |
767 | default: |
768 | fail: |
769 | Perl_croak(aTHX_ |
770 | "get_layers: unknown argument '%s'", |
771 | key); |
772 | } |
773 | } |
774 | |
775 | SP -= (items - 1); |
776 | } |
777 | |
778 | sv = POPs; |
779 | gv = (GV*)sv; |
780 | |
781 | if (!isGV(sv)) { |
782 | if (SvROK(sv) && isGV(SvRV(sv))) |
783 | gv = (GV*)SvRV(sv); |
784 | else |
785 | gv = gv_fetchpv(SvPVX(sv), FALSE, SVt_PVIO); |
786 | } |
787 | |
788 | if (gv && (io = GvIO(gv))) { |
789 | dTARGET; |
790 | AV* av = PerlIO_get_layers(aTHX_ input ? |
791 | IoIFP(io) : IoOFP(io)); |
792 | I32 i; |
793 | I32 last = av_len(av); |
794 | I32 nitem = 0; |
795 | |
796 | for (i = last; i >= 0; i -= 3) { |
797 | SV **namsvp; |
798 | SV **argsvp; |
799 | SV **flgsvp; |
800 | bool namok, argok, flgok; |
801 | |
802 | namsvp = av_fetch(av, i - 2, FALSE); |
803 | argsvp = av_fetch(av, i - 1, FALSE); |
804 | flgsvp = av_fetch(av, i, FALSE); |
805 | |
806 | namok = namsvp && *namsvp && SvPOK(*namsvp); |
807 | argok = argsvp && *argsvp && SvPOK(*argsvp); |
808 | flgok = flgsvp && *flgsvp && SvIOK(*flgsvp); |
809 | |
810 | if (details) { |
811 | XPUSHs(namok ? |
812 | newSVpv(SvPVX(*namsvp), 0) : &PL_sv_undef); |
813 | XPUSHs(argok ? |
814 | newSVpv(SvPVX(*argsvp), 0) : &PL_sv_undef); |
815 | if (flgok) |
816 | XPUSHi(SvIVX(*flgsvp)); |
817 | else |
818 | XPUSHs(&PL_sv_undef); |
819 | nitem += 3; |
820 | } |
821 | else { |
822 | if (namok && argok) |
823 | XPUSHs(Perl_newSVpvf(aTHX_ "%"SVf"(%"SVf")", |
824 | *namsvp, *argsvp)); |
825 | else if (namok) |
826 | XPUSHs(Perl_newSVpvf(aTHX_ "%"SVf, *namsvp)); |
827 | else |
828 | XPUSHs(&PL_sv_undef); |
829 | nitem++; |
830 | if (flgok) { |
831 | IV flags = SvIVX(*flgsvp); |
832 | |
833 | if (flags & PERLIO_F_UTF8) { |
834 | XPUSHs(newSVpvn("utf8", 4)); |
835 | nitem++; |
836 | } |
837 | } |
838 | } |
839 | } |
840 | |
841 | SvREFCNT_dec(av); |
842 | |
843 | XSRETURN(nitem); |
844 | } |
845 | } |
5fef3b4a |
846 | #endif |
39f7a870 |
847 | |
848 | XSRETURN(0); |
849 | } |
850 | |