Commit | Line | Data |
---|---|---|
d6376244 JH |
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 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 | |
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 MS |
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 MS |
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 GS |
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 GS |
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 GS |
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 GS |
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 NIS |
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), |
599cee73 | 97 | "Can't locate package %s for @%s::ISA", |
6d4a7be2 | 98 | SvPVX(sv), HvNAME(stash)); |
99 | continue; | |
100 | } | |
301daebc MS |
101 | if (&PL_sv_yes == isa_lookup(basestash, name, name_stash, |
102 | len, level + 1)) { | |
3280af22 NIS |
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 JH |
115 | =head1 SV Manipulation Functions |
116 | ||
954c1994 GS |
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 MS |
149 | name_stash = gv_stashpv(name, FALSE); |
150 | ||
55497cff | 151 | return (type && strEQ(type,name)) || |
301daebc MS |
152 | (stash && isa_lookup(stash, name, name_stash, strlen(name), 0) |
153 | == &PL_sv_yes) | |
55497cff | 154 | ? TRUE |
155 | : FALSE ; | |
55497cff | 156 | } |
157 | ||
1b026014 NIS |
158 | #include "XSUB.h" |
159 | ||
acfe0abc GS |
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 JP |
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 NIS |
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 JH |
176 | XS(XS_Internals_SvREADONLY); |
177 | XS(XS_Internals_SvREFCNT); | |
f044d0d1 | 178 | XS(XS_Internals_hv_clear_placehold); |
0cb96387 GS |
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 JP |
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 JP |
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 NIS |
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 JH |
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 GS |
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 GS |
232 | if (SvGMAGICAL(sv)) |
233 | mg_get(sv); | |
234 | ||
aca069ec | 235 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)))) |
f8f70380 GS |
236 | XSRETURN_UNDEF; |
237 | ||
2d8e6c8d | 238 | name = (char *)SvPV(ST(1),n_a); |
6d4a7be2 | 239 | |
54310121 | 240 | ST(0) = boolSV(sv_derived_from(sv, name)); |
6d4a7be2 | 241 | XSRETURN(1); |
242 | } | |
243 | ||
6d4a7be2 | 244 | XS(XS_UNIVERSAL_can) |
245 | { | |
246 | dXSARGS; | |
247 | SV *sv; | |
248 | char *name; | |
249 | SV *rv; | |
6f08146e | 250 | HV *pkg = NULL; |
2d8e6c8d | 251 | STRLEN n_a; |
6d4a7be2 | 252 | |
253 | if (items != 2) | |
cea2e8a9 | 254 | Perl_croak(aTHX_ "Usage: UNIVERSAL::can(object-ref, method)"); |
6d4a7be2 | 255 | |
256 | sv = ST(0); | |
f8f70380 | 257 | |
d3f7f2b2 GS |
258 | if (SvGMAGICAL(sv)) |
259 | mg_get(sv); | |
260 | ||
aca069ec | 261 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)))) |
f8f70380 GS |
262 | XSRETURN_UNDEF; |
263 | ||
2d8e6c8d | 264 | name = (char *)SvPV(ST(1),n_a); |
3280af22 | 265 | rv = &PL_sv_undef; |
6d4a7be2 | 266 | |
46e4b22b | 267 | if (SvROK(sv)) { |
6f08146e | 268 | sv = (SV*)SvRV(sv); |
46e4b22b | 269 | if (SvOBJECT(sv)) |
6f08146e NIS |
270 | pkg = SvSTASH(sv); |
271 | } | |
272 | else { | |
273 | pkg = gv_stashsv(sv, FALSE); | |
274 | } | |
275 | ||
276 | if (pkg) { | |
dc848c6f | 277 | GV *gv = gv_fetchmethod_autoload(pkg, name, FALSE); |
278 | if (gv && isGV(gv)) | |
279 | rv = sv_2mortal(newRV((SV*)GvCV(gv))); | |
6d4a7be2 | 280 | } |
281 | ||
282 | ST(0) = rv; | |
283 | XSRETURN(1); | |
284 | } | |
285 | ||
6d4a7be2 | 286 | XS(XS_UNIVERSAL_VERSION) |
287 | { | |
288 | dXSARGS; | |
289 | HV *pkg; | |
290 | GV **gvp; | |
291 | GV *gv; | |
292 | SV *sv; | |
293 | char *undef; | |
294 | ||
1571675a | 295 | if (SvROK(ST(0))) { |
6d4a7be2 | 296 | sv = (SV*)SvRV(ST(0)); |
1571675a | 297 | if (!SvOBJECT(sv)) |
cea2e8a9 | 298 | Perl_croak(aTHX_ "Cannot find version of an unblessed reference"); |
6d4a7be2 | 299 | pkg = SvSTASH(sv); |
300 | } | |
301 | else { | |
302 | pkg = gv_stashsv(ST(0), FALSE); | |
303 | } | |
304 | ||
305 | gvp = pkg ? (GV**)hv_fetch(pkg,"VERSION",7,FALSE) : Null(GV**); | |
306 | ||
d4bea2fb | 307 | if (gvp && isGV(gv = *gvp) && SvOK(sv = GvSV(gv))) { |
6d4a7be2 | 308 | SV *nsv = sv_newmortal(); |
309 | sv_setsv(nsv, sv); | |
310 | sv = nsv; | |
311 | undef = Nullch; | |
312 | } | |
313 | else { | |
3280af22 | 314 | sv = (SV*)&PL_sv_undef; |
6d4a7be2 | 315 | undef = "(undef)"; |
316 | } | |
317 | ||
1571675a GS |
318 | if (items > 1) { |
319 | STRLEN len; | |
320 | SV *req = ST(1); | |
321 | ||
62658f4d PM |
322 | if (undef) { |
323 | if (pkg) | |
324 | Perl_croak(aTHX_ | |
325 | "%s does not define $%s::VERSION--version check failed", | |
326 | HvNAME(pkg), HvNAME(pkg)); | |
327 | else { | |
328 | char *str = SvPVx(ST(0), len); | |
329 | ||
330 | Perl_croak(aTHX_ | |
331 | "%s defines neither package nor VERSION--version check failed", str); | |
332 | } | |
333 | } | |
ad63d80f JP |
334 | if ( !sv_derived_from(sv, "version")) |
335 | sv = new_version(sv); | |
336 | ||
337 | if ( !sv_derived_from(req, "version")) | |
338 | req = new_version(req); | |
1571675a | 339 | |
ad63d80f | 340 | if ( vcmp( SvRV(req), SvRV(sv) ) > 0 ) |
1571675a | 341 | Perl_croak(aTHX_ "%s version %s required--this is only version %s", |
ad63d80f | 342 | HvNAME(pkg), SvPV(req,PL_na), SvPV(sv,PL_na)); |
2d8e6c8d | 343 | } |
6d4a7be2 | 344 | |
345 | ST(0) = sv; | |
346 | ||
347 | XSRETURN(1); | |
348 | } | |
349 | ||
439cb1c4 JP |
350 | XS(XS_version_new) |
351 | { | |
352 | dXSARGS; | |
353 | if (items != 2) | |
354 | Perl_croak(aTHX_ "Usage: version::new(class, version)"); | |
355 | SP -= items; | |
356 | { | |
357 | /* char * class = (char *)SvPV_nolen(ST(0)); */ | |
358 | SV * version = ST(1); | |
359 | ||
360 | { | |
361 | PUSHs(new_version(version)); | |
362 | } | |
363 | ||
364 | PUTBACK; | |
365 | return; | |
366 | } | |
367 | } | |
368 | ||
369 | XS(XS_version_stringify) | |
370 | { | |
371 | dXSARGS; | |
372 | if (items < 1) | |
373 | Perl_croak(aTHX_ "Usage: version::stringify(lobj, ...)"); | |
374 | SP -= items; | |
375 | { | |
376 | SV * lobj; | |
377 | ||
378 | if (sv_derived_from(ST(0), "version")) { | |
379 | SV *tmp = SvRV(ST(0)); | |
380 | lobj = tmp; | |
381 | } | |
382 | else | |
ba329e04 | 383 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 JP |
384 | |
385 | { | |
ad63d80f | 386 | PUSHs(vstringify(lobj)); |
439cb1c4 JP |
387 | } |
388 | ||
389 | PUTBACK; | |
390 | return; | |
391 | } | |
392 | } | |
393 | ||
394 | XS(XS_version_numify) | |
395 | { | |
396 | dXSARGS; | |
397 | if (items < 1) | |
398 | Perl_croak(aTHX_ "Usage: version::numify(lobj, ...)"); | |
399 | SP -= items; | |
400 | { | |
401 | SV * lobj; | |
402 | ||
403 | if (sv_derived_from(ST(0), "version")) { | |
404 | SV *tmp = SvRV(ST(0)); | |
405 | lobj = tmp; | |
406 | } | |
407 | else | |
ba329e04 | 408 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 JP |
409 | |
410 | { | |
ad63d80f | 411 | PUSHs(vnumify(lobj)); |
439cb1c4 JP |
412 | } |
413 | ||
414 | PUTBACK; | |
415 | return; | |
416 | } | |
417 | } | |
418 | ||
419 | XS(XS_version_vcmp) | |
420 | { | |
421 | dXSARGS; | |
422 | if (items < 1) | |
423 | Perl_croak(aTHX_ "Usage: version::vcmp(lobj, ...)"); | |
424 | SP -= items; | |
425 | { | |
426 | SV * lobj; | |
427 | ||
428 | if (sv_derived_from(ST(0), "version")) { | |
429 | SV *tmp = SvRV(ST(0)); | |
430 | lobj = tmp; | |
431 | } | |
432 | else | |
ba329e04 | 433 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 JP |
434 | |
435 | { | |
436 | SV *rs; | |
437 | SV *rvs; | |
438 | SV * robj = ST(1); | |
439 | IV swap = (IV)SvIV(ST(2)); | |
440 | ||
441 | if ( ! sv_derived_from(robj, "version") ) | |
442 | { | |
443 | robj = new_version(robj); | |
444 | } | |
445 | rvs = SvRV(robj); | |
446 | ||
447 | if ( swap ) | |
448 | { | |
ad63d80f | 449 | rs = newSViv(vcmp(rvs,lobj)); |
439cb1c4 JP |
450 | } |
451 | else | |
452 | { | |
ad63d80f | 453 | rs = newSViv(vcmp(lobj,rvs)); |
439cb1c4 JP |
454 | } |
455 | ||
456 | PUSHs(rs); | |
457 | } | |
458 | ||
459 | PUTBACK; | |
460 | return; | |
461 | } | |
462 | } | |
463 | ||
464 | XS(XS_version_boolean) | |
465 | { | |
466 | dXSARGS; | |
467 | if (items < 1) | |
468 | Perl_croak(aTHX_ "Usage: version::boolean(lobj, ...)"); | |
469 | SP -= items; | |
470 | { | |
471 | SV * lobj; | |
472 | ||
473 | if (sv_derived_from(ST(0), "version")) { | |
474 | SV *tmp = SvRV(ST(0)); | |
475 | lobj = tmp; | |
476 | } | |
477 | else | |
ba329e04 | 478 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 JP |
479 | |
480 | { | |
481 | SV *rs; | |
ad63d80f | 482 | rs = newSViv( vcmp(lobj,new_version(newSVpvn("0",1))) ); |
439cb1c4 JP |
483 | PUSHs(rs); |
484 | } | |
485 | ||
486 | PUTBACK; | |
487 | return; | |
488 | } | |
489 | } | |
490 | ||
491 | XS(XS_version_noop) | |
492 | { | |
493 | dXSARGS; | |
494 | if (items < 1) | |
495 | Perl_croak(aTHX_ "Usage: version::noop(lobj, ...)"); | |
496 | { | |
497 | SV * lobj; | |
498 | ||
499 | if (sv_derived_from(ST(0), "version")) { | |
500 | SV *tmp = SvRV(ST(0)); | |
501 | lobj = tmp; | |
502 | } | |
503 | else | |
ba329e04 | 504 | Perl_croak(aTHX_ "lobj is not of type version"); |
439cb1c4 JP |
505 | |
506 | { | |
ba329e04 | 507 | Perl_croak(aTHX_ "operation not supported with version object"); |
439cb1c4 JP |
508 | } |
509 | ||
510 | } | |
511 | XSRETURN_EMPTY; | |
512 | } | |
513 | ||
1b026014 NIS |
514 | XS(XS_utf8_valid) |
515 | { | |
516 | dXSARGS; | |
517 | if (items != 1) | |
518 | Perl_croak(aTHX_ "Usage: utf8::valid(sv)"); | |
519 | { | |
520 | SV * sv = ST(0); | |
521 | { | |
522 | STRLEN len; | |
523 | char *s = SvPV(sv,len); | |
524 | if (!SvUTF8(sv) || is_utf8_string((U8*)s,len)) | |
525 | XSRETURN_YES; | |
526 | else | |
527 | XSRETURN_NO; | |
528 | } | |
529 | } | |
530 | XSRETURN_EMPTY; | |
531 | } | |
532 | ||
533 | XS(XS_utf8_encode) | |
534 | { | |
535 | dXSARGS; | |
536 | if (items != 1) | |
537 | Perl_croak(aTHX_ "Usage: utf8::encode(sv)"); | |
538 | { | |
539 | SV * sv = ST(0); | |
540 | ||
541 | sv_utf8_encode(sv); | |
542 | } | |
543 | XSRETURN_EMPTY; | |
544 | } | |
545 | ||
546 | XS(XS_utf8_decode) | |
547 | { | |
548 | dXSARGS; | |
549 | if (items != 1) | |
550 | Perl_croak(aTHX_ "Usage: utf8::decode(sv)"); | |
551 | { | |
552 | SV * sv = ST(0); | |
553 | bool RETVAL; | |
554 | ||
555 | RETVAL = sv_utf8_decode(sv); | |
556 | ST(0) = boolSV(RETVAL); | |
557 | sv_2mortal(ST(0)); | |
558 | } | |
559 | XSRETURN(1); | |
560 | } | |
561 | ||
562 | XS(XS_utf8_upgrade) | |
563 | { | |
564 | dXSARGS; | |
565 | if (items != 1) | |
566 | Perl_croak(aTHX_ "Usage: utf8::upgrade(sv)"); | |
567 | { | |
568 | SV * sv = ST(0); | |
569 | STRLEN RETVAL; | |
570 | dXSTARG; | |
571 | ||
572 | RETVAL = sv_utf8_upgrade(sv); | |
573 | XSprePUSH; PUSHi((IV)RETVAL); | |
574 | } | |
575 | XSRETURN(1); | |
576 | } | |
577 | ||
578 | XS(XS_utf8_downgrade) | |
579 | { | |
580 | dXSARGS; | |
581 | if (items < 1 || items > 2) | |
582 | Perl_croak(aTHX_ "Usage: utf8::downgrade(sv, failok=0)"); | |
583 | { | |
584 | SV * sv = ST(0); | |
585 | bool failok; | |
586 | bool RETVAL; | |
587 | ||
588 | if (items < 2) | |
589 | failok = 0; | |
590 | else { | |
591 | failok = (int)SvIV(ST(1)); | |
592 | } | |
593 | ||
594 | RETVAL = sv_utf8_downgrade(sv, failok); | |
595 | ST(0) = boolSV(RETVAL); | |
596 | sv_2mortal(ST(0)); | |
597 | } | |
598 | XSRETURN(1); | |
599 | } | |
600 | ||
601 | XS(XS_utf8_native_to_unicode) | |
602 | { | |
603 | dXSARGS; | |
604 | UV uv = SvUV(ST(0)); | |
b7953727 JH |
605 | |
606 | if (items > 1) | |
607 | Perl_croak(aTHX_ "Usage: utf8::native_to_unicode(sv)"); | |
608 | ||
1b026014 NIS |
609 | ST(0) = sv_2mortal(newSViv(NATIVE_TO_UNI(uv))); |
610 | XSRETURN(1); | |
611 | } | |
612 | ||
613 | XS(XS_utf8_unicode_to_native) | |
614 | { | |
615 | dXSARGS; | |
616 | UV uv = SvUV(ST(0)); | |
b7953727 JH |
617 | |
618 | if (items > 1) | |
619 | Perl_croak(aTHX_ "Usage: utf8::unicode_to_native(sv)"); | |
620 | ||
1b026014 NIS |
621 | ST(0) = sv_2mortal(newSViv(UNI_TO_NATIVE(uv))); |
622 | XSRETURN(1); | |
623 | } | |
624 | ||
14a976d6 | 625 | XS(XS_Internals_SvREADONLY) /* This is dangerous stuff. */ |
29569577 JH |
626 | { |
627 | dXSARGS; | |
628 | SV *sv = SvRV(ST(0)); | |
629 | if (items == 1) { | |
630 | if (SvREADONLY(sv)) | |
631 | XSRETURN_YES; | |
632 | else | |
633 | XSRETURN_NO; | |
634 | } | |
635 | else if (items == 2) { | |
636 | if (SvTRUE(ST(1))) { | |
637 | SvREADONLY_on(sv); | |
638 | XSRETURN_YES; | |
639 | } | |
640 | else { | |
14a976d6 | 641 | /* I hope you really know what you are doing. */ |
29569577 JH |
642 | SvREADONLY_off(sv); |
643 | XSRETURN_NO; | |
644 | } | |
645 | } | |
14a976d6 | 646 | XSRETURN_UNDEF; /* Can't happen. */ |
29569577 JH |
647 | } |
648 | ||
14a976d6 | 649 | XS(XS_Internals_SvREFCNT) /* This is dangerous stuff. */ |
29569577 JH |
650 | { |
651 | dXSARGS; | |
652 | SV *sv = SvRV(ST(0)); | |
653 | if (items == 1) | |
14a976d6 | 654 | XSRETURN_IV(SvREFCNT(sv) - 1); /* Minus the ref created for us. */ |
29569577 | 655 | else if (items == 2) { |
14a976d6 | 656 | /* I hope you really know what you are doing. */ |
29569577 JH |
657 | SvREFCNT(sv) = SvIV(ST(1)); |
658 | XSRETURN_IV(SvREFCNT(sv)); | |
659 | } | |
14a976d6 | 660 | XSRETURN_UNDEF; /* Can't happen. */ |
29569577 JH |
661 | } |
662 | ||
dfd4ef2f NC |
663 | /* Maybe this should return the number of placeholders found in scalar context, |
664 | and a list of them in list context. */ | |
f044d0d1 | 665 | XS(XS_Internals_hv_clear_placehold) |
dfd4ef2f NC |
666 | { |
667 | dXSARGS; | |
668 | HV *hv = (HV *) SvRV(ST(0)); | |
669 | ||
670 | /* I don't care how many parameters were passed in, but I want to avoid | |
671 | the unused variable warning. */ | |
672 | ||
eb160463 | 673 | items = (I32)HvPLACEHOLDERS(hv); |
dfd4ef2f NC |
674 | |
675 | if (items) { | |
676 | HE *entry; | |
677 | I32 riter = HvRITER(hv); | |
678 | HE *eiter = HvEITER(hv); | |
679 | hv_iterinit(hv); | |
fe7bca90 NC |
680 | /* This may look suboptimal with the items *after* the iternext, but |
681 | it's quite deliberate. We only get here with items==0 if we've | |
682 | just deleted the last placeholder in the hash. If we've just done | |
683 | that then it means that the hash is in lazy delete mode, and the | |
684 | HE is now only referenced in our iterator. If we just quit the loop | |
685 | and discarded our iterator then the HE leaks. So we do the && the | |
686 | other way to ensure iternext is called just one more time, which | |
687 | has the side effect of triggering the lazy delete. */ | |
688 | while ((entry = hv_iternext_flags(hv, HV_ITERNEXT_WANTPLACEHOLDERS)) | |
689 | && items) { | |
dfd4ef2f NC |
690 | SV *val = hv_iterval(hv, entry); |
691 | ||
692 | if (val == &PL_sv_undef) { | |
693 | ||
694 | /* It seems that I have to go back in the front of the hash | |
695 | API to delete a hash, even though I have a HE structure | |
696 | pointing to the very entry I want to delete, and could hold | |
697 | onto the previous HE that points to it. And it's easier to | |
698 | go in with SVs as I can then specify the precomputed hash, | |
699 | and don't have fun and games with utf8 keys. */ | |
700 | SV *key = hv_iterkeysv(entry); | |
701 | ||
702 | hv_delete_ent (hv, key, G_DISCARD, HeHASH(entry)); | |
703 | items--; | |
704 | } | |
705 | } | |
706 | HvRITER(hv) = riter; | |
707 | HvEITER(hv) = eiter; | |
708 | } | |
709 | ||
710 | XSRETURN(0); | |
711 | } |