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