Commit | Line | Data |
---|---|---|
d6376244 JH |
1 | /* universal.c |
2 | * | |
f27f8384 | 3 | * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, |
583439ab | 4 | * 2005, by Larry Wall and others |
d6376244 JH |
5 | * |
6 | * You may distribute under the terms of either the GNU General Public | |
7 | * License or the Artistic License, as specified in the README file. | |
8 | * | |
9 | */ | |
10 | ||
d31a8517 AT |
11 | /* |
12 | * "The roots of those mountains must be roots indeed; there must be | |
13 | * great secrets buried there which have not been discovered since the | |
14 | * beginning." --Gandalf, relating Gollum's story | |
15 | */ | |
16 | ||
40d34c0d SB |
17 | /* This file contains the code that implements the functions in Perl's |
18 | * UNIVERSAL package, such as UNIVERSAL->can(). | |
19 | */ | |
20 | ||
6d4a7be2 | 21 | #include "EXTERN.h" |
864dbfa3 | 22 | #define PERL_IN_UNIVERSAL_C |
6d4a7be2 | 23 | #include "perl.h" |
6d4a7be2 | 24 | |
5095c3e6 JH |
25 | #ifdef USE_PERLIO |
26 | #include "perliol.h" /* For the PERLIO_F_XXX */ | |
27 | #endif | |
28 | ||
6d4a7be2 | 29 | /* |
30 | * Contributed by Graham Barr <Graham.Barr@tiuk.ti.com> | |
31 | * The main guts of traverse_isa was actually copied from gv_fetchmeth | |
32 | */ | |
33 | ||
76e3520e | 34 | STATIC SV * |
301daebc MS |
35 | S_isa_lookup(pTHX_ HV *stash, const char *name, HV* name_stash, |
36 | int len, int level) | |
6d4a7be2 | 37 | { |
38 | AV* av; | |
39 | GV* gv; | |
40 | GV** gvp; | |
41 | HV* hv = Nullhv; | |
46e4b22b | 42 | SV* subgen = Nullsv; |
6d4a7be2 | 43 | |
301daebc MS |
44 | /* A stash/class can go by many names (ie. User == main::User), so |
45 | we compare the stash itself just in case */ | |
46 | if (name_stash && (stash == name_stash)) | |
47 | return &PL_sv_yes; | |
6d4a7be2 | 48 | |
46e4b22b | 49 | if (strEQ(HvNAME(stash), name)) |
3280af22 | 50 | return &PL_sv_yes; |
6d4a7be2 | 51 | |
4e58e0cf JH |
52 | if (strEQ(name, "UNIVERSAL")) |
53 | return &PL_sv_yes; | |
54 | ||
6d4a7be2 | 55 | if (level > 100) |
46e4b22b GS |
56 | Perl_croak(aTHX_ "Recursive inheritance detected in package '%s'", |
57 | HvNAME(stash)); | |
6d4a7be2 | 58 | |
59 | gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, FALSE); | |
60 | ||
46e4b22b GS |
61 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (subgen = GvSV(gv)) |
62 | && (hv = GvHV(gv))) | |
63 | { | |
eb160463 | 64 | if (SvIV(subgen) == (IV)PL_sub_generation) { |
46e4b22b GS |
65 | SV* sv; |
66 | SV** svp = (SV**)hv_fetch(hv, name, len, FALSE); | |
67 | if (svp && (sv = *svp) != (SV*)&PL_sv_undef) { | |
68 | DEBUG_o( Perl_deb(aTHX_ "Using cached ISA %s for package %s\n", | |
69 | name, HvNAME(stash)) ); | |
70 | return sv; | |
71 | } | |
72 | } | |
73 | else { | |
74 | DEBUG_o( Perl_deb(aTHX_ "ISA Cache in package %s is stale\n", | |
75 | HvNAME(stash)) ); | |
76 | hv_clear(hv); | |
77 | sv_setiv(subgen, PL_sub_generation); | |
78 | } | |
6d4a7be2 | 79 | } |
80 | ||
81 | gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE); | |
46e4b22b | 82 | |
3280af22 | 83 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
46e4b22b | 84 | if (!hv || !subgen) { |
6d4a7be2 | 85 | gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, TRUE); |
86 | ||
87 | gv = *gvp; | |
88 | ||
89 | if (SvTYPE(gv) != SVt_PVGV) | |
90 | gv_init(gv, stash, "::ISA::CACHE::", 14, TRUE); | |
91 | ||
46e4b22b GS |
92 | if (!hv) |
93 | hv = GvHVn(gv); | |
94 | if (!subgen) { | |
95 | subgen = newSViv(PL_sub_generation); | |
96 | GvSV(gv) = subgen; | |
97 | } | |
6d4a7be2 | 98 | } |
46e4b22b | 99 | if (hv) { |
6d4a7be2 | 100 | SV** svp = AvARRAY(av); |
93965878 NIS |
101 | /* NOTE: No support for tied ISA */ |
102 | I32 items = AvFILLp(av) + 1; | |
6d4a7be2 | 103 | while (items--) { |
104 | SV* sv = *svp++; | |
105 | HV* basestash = gv_stashsv(sv, FALSE); | |
106 | if (!basestash) { | |
599cee73 | 107 | if (ckWARN(WARN_MISC)) |
9014280d | 108 | Perl_warner(aTHX_ packWARN(WARN_SYNTAX), |
c293eb2b NC |
109 | "Can't locate package %"SVf" for @%s::ISA", |
110 | sv, HvNAME(stash)); | |
6d4a7be2 | 111 | continue; |
112 | } | |
301daebc MS |
113 | if (&PL_sv_yes == isa_lookup(basestash, name, name_stash, |
114 | len, level + 1)) { | |
3280af22 NIS |
115 | (void)hv_store(hv,name,len,&PL_sv_yes,0); |
116 | return &PL_sv_yes; | |
6d4a7be2 | 117 | } |
118 | } | |
3280af22 | 119 | (void)hv_store(hv,name,len,&PL_sv_no,0); |
6d4a7be2 | 120 | } |
121 | } | |
4e58e0cf | 122 | return &PL_sv_no; |
6d4a7be2 | 123 | } |
124 | ||
954c1994 | 125 | /* |
ccfc67b7 JH |
126 | =head1 SV Manipulation Functions |
127 | ||
954c1994 GS |
128 | =for apidoc sv_derived_from |
129 | ||
130 | Returns a boolean indicating whether the SV is derived from the specified | |
131 | class. This is the function that implements C<UNIVERSAL::isa>. It works | |
132 | for class names as well as for objects. | |
133 | ||
134 | =cut | |
135 | */ | |
136 | ||
55497cff | 137 | bool |
864dbfa3 | 138 | Perl_sv_derived_from(pTHX_ SV *sv, const char *name) |
55497cff | 139 | { |
c05e0e2f | 140 | const char *type; |
55497cff | 141 | HV *stash; |
301daebc | 142 | HV *name_stash; |
46e4b22b | 143 | |
55497cff | 144 | stash = Nullhv; |
145 | type = Nullch; | |
46e4b22b | 146 | |
55497cff | 147 | if (SvGMAGICAL(sv)) |
148 | mg_get(sv) ; | |
149 | ||
150 | if (SvROK(sv)) { | |
151 | sv = SvRV(sv); | |
152 | type = sv_reftype(sv,0); | |
46e4b22b | 153 | if (SvOBJECT(sv)) |
55497cff | 154 | stash = SvSTASH(sv); |
155 | } | |
156 | else { | |
157 | stash = gv_stashsv(sv, FALSE); | |
158 | } | |
46e4b22b | 159 | |
301daebc MS |
160 | name_stash = gv_stashpv(name, FALSE); |
161 | ||
55497cff | 162 | return (type && strEQ(type,name)) || |
301daebc MS |
163 | (stash && isa_lookup(stash, name, name_stash, strlen(name), 0) |
164 | == &PL_sv_yes) | |
55497cff | 165 | ? TRUE |
166 | : FALSE ; | |
55497cff | 167 | } |
168 | ||
1b026014 NIS |
169 | #include "XSUB.h" |
170 | ||
acfe0abc GS |
171 | void XS_UNIVERSAL_isa(pTHX_ CV *cv); |
172 | void XS_UNIVERSAL_can(pTHX_ CV *cv); | |
173 | void XS_UNIVERSAL_VERSION(pTHX_ CV *cv); | |
18729d3e | 174 | XS(XS_utf8_is_utf8); |
1b026014 NIS |
175 | XS(XS_utf8_valid); |
176 | XS(XS_utf8_encode); | |
177 | XS(XS_utf8_decode); | |
178 | XS(XS_utf8_upgrade); | |
179 | XS(XS_utf8_downgrade); | |
180 | XS(XS_utf8_unicode_to_native); | |
181 | XS(XS_utf8_native_to_unicode); | |
29569577 JH |
182 | XS(XS_Internals_SvREADONLY); |
183 | XS(XS_Internals_SvREFCNT); | |
f044d0d1 | 184 | XS(XS_Internals_hv_clear_placehold); |
5095c3e6 | 185 | XS(XS_PerlIO_get_layers); |
5e8f8cda | 186 | XS(XS_Regexp_DESTROY); |
108e6616 | 187 | XS(XS_Internals_hash_seed); |
7f047bfa | 188 | XS(XS_Internals_rehash_seed); |
cdeba5a7 | 189 | XS(XS_Internals_HvREHASH); |
0cb96387 GS |
190 | |
191 | void | |
192 | Perl_boot_core_UNIVERSAL(pTHX) | |
193 | { | |
c05e0e2f | 194 | const char file[] = __FILE__; |
0cb96387 GS |
195 | |
196 | newXS("UNIVERSAL::isa", XS_UNIVERSAL_isa, file); | |
197 | newXS("UNIVERSAL::can", XS_UNIVERSAL_can, file); | |
198 | newXS("UNIVERSAL::VERSION", XS_UNIVERSAL_VERSION, file); | |
18729d3e | 199 | newXS("utf8::is_utf8", XS_utf8_is_utf8, file); |
1b026014 NIS |
200 | newXS("utf8::valid", XS_utf8_valid, file); |
201 | newXS("utf8::encode", XS_utf8_encode, file); | |
202 | newXS("utf8::decode", XS_utf8_decode, file); | |
203 | newXS("utf8::upgrade", XS_utf8_upgrade, file); | |
204 | newXS("utf8::downgrade", XS_utf8_downgrade, file); | |
205 | newXS("utf8::native_to_unicode", XS_utf8_native_to_unicode, file); | |
206 | newXS("utf8::unicode_to_native", XS_utf8_unicode_to_native, file); | |
29569577 JH |
207 | newXSproto("Internals::SvREADONLY",XS_Internals_SvREADONLY, file, "\\[$%@];$"); |
208 | newXSproto("Internals::SvREFCNT",XS_Internals_SvREFCNT, file, "\\[$%@];$"); | |
dfd4ef2f | 209 | newXSproto("Internals::hv_clear_placeholders", |
f044d0d1 | 210 | XS_Internals_hv_clear_placehold, file, "\\%"); |
e0dae7fe JH |
211 | newXSproto("PerlIO::get_layers", |
212 | XS_PerlIO_get_layers, file, "*;@"); | |
5e8f8cda | 213 | newXS("Regexp::DESTROY", XS_Regexp_DESTROY, file); |
108e6616 | 214 | newXSproto("Internals::hash_seed",XS_Internals_hash_seed, file, ""); |
7f047bfa | 215 | newXSproto("Internals::rehash_seed",XS_Internals_rehash_seed, file, ""); |
cdeba5a7 | 216 | newXSproto("Internals::HvREHASH", XS_Internals_HvREHASH, file, "\\%"); |
0cb96387 GS |
217 | } |
218 | ||
55497cff | 219 | |
6d4a7be2 | 220 | XS(XS_UNIVERSAL_isa) |
221 | { | |
222 | dXSARGS; | |
55497cff | 223 | SV *sv; |
c501bbfe | 224 | const 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 | ||
6563884d JH |
235 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)) |
236 | || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv)))) | |
f8f70380 GS |
237 | XSRETURN_UNDEF; |
238 | ||
c501bbfe | 239 | name = (const 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; | |
c501bbfe | 249 | const char *name; |
6d4a7be2 | 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 GS |
259 | if (SvGMAGICAL(sv)) |
260 | mg_get(sv); | |
261 | ||
6563884d JH |
262 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)) |
263 | || (SvGMAGICAL(sv) && SvPOKp(sv) && SvCUR(sv)))) | |
f8f70380 GS |
264 | XSRETURN_UNDEF; |
265 | ||
c501bbfe | 266 | name = (const 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 NIS |
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; | |
c05e0e2f | 295 | const char *undef; |
6d4a7be2 | 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 GS |
320 | if (items > 1) { |
321 | STRLEN len; | |
322 | SV *req = ST(1); | |
323 | ||
62658f4d PM |
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 { | |
c05e0e2f | 330 | const char *str = SvPVx(ST(0), len); |
62658f4d PM |
331 | |
332 | Perl_croak(aTHX_ | |
333 | "%s defines neither package nor VERSION--version check failed", str); | |
334 | } | |
335 | } | |
1571675a GS |
336 | if (!SvNIOK(sv) && SvPOK(sv)) { |
337 | char *str = SvPVx(sv,len); | |
338 | while (len) { | |
339 | --len; | |
340 | /* XXX could DWIM "1.2.3" here */ | |
341 | if (!isDIGIT(str[len]) && str[len] != '.' && str[len] != '_') | |
342 | break; | |
343 | } | |
344 | if (len) { | |
4305d8ab | 345 | if (SvNOK(req) && SvPOK(req)) { |
1571675a GS |
346 | /* they said C<use Foo v1.2.3> and $Foo::VERSION |
347 | * doesn't look like a float: do string compare */ | |
348 | if (sv_cmp(req,sv) == 1) { | |
d2560b70 RB |
349 | Perl_croak(aTHX_ "%s v%"VDf" required--" |
350 | "this is only v%"VDf, | |
1571675a GS |
351 | HvNAME(pkg), req, sv); |
352 | } | |
353 | goto finish; | |
354 | } | |
355 | /* they said C<use Foo 1.002_003> and $Foo::VERSION | |
356 | * doesn't look like a float: force numeric compare */ | |
155aba94 | 357 | (void)SvUPGRADE(sv, SVt_PVNV); |
1571675a GS |
358 | SvNVX(sv) = str_to_version(sv); |
359 | SvPOK_off(sv); | |
360 | SvNOK_on(sv); | |
361 | } | |
362 | } | |
363 | /* if we get here, we're looking for a numeric comparison, | |
364 | * so force the required version into a float, even if they | |
365 | * said C<use Foo v1.2.3> */ | |
4305d8ab | 366 | if (SvNOK(req) && SvPOK(req)) { |
1571675a GS |
367 | NV n = SvNV(req); |
368 | req = sv_newmortal(); | |
369 | sv_setnv(req, n); | |
370 | } | |
371 | ||
f6eb1a96 | 372 | if (SvNV(req) > SvNV(sv)) |
1571675a | 373 | Perl_croak(aTHX_ "%s version %s required--this is only version %s", |
f6eb1a96 | 374 | HvNAME(pkg), SvPV_nolen(req), SvPV_nolen(sv)); |
2d8e6c8d | 375 | } |
6d4a7be2 | 376 | |
1571675a | 377 | finish: |
6d4a7be2 | 378 | ST(0) = sv; |
379 | ||
380 | XSRETURN(1); | |
381 | } | |
382 | ||
18729d3e JH |
383 | XS(XS_utf8_is_utf8) |
384 | { | |
385 | dXSARGS; | |
386 | if (items != 1) | |
387 | Perl_croak(aTHX_ "Usage: utf8::is_utf8(sv)"); | |
388 | { | |
c501bbfe | 389 | const SV *sv = ST(0); |
18729d3e JH |
390 | { |
391 | if (SvUTF8(sv)) | |
392 | XSRETURN_YES; | |
393 | else | |
394 | XSRETURN_NO; | |
395 | } | |
396 | } | |
397 | XSRETURN_EMPTY; | |
398 | } | |
399 | ||
1b026014 NIS |
400 | XS(XS_utf8_valid) |
401 | { | |
18729d3e JH |
402 | dXSARGS; |
403 | if (items != 1) | |
404 | Perl_croak(aTHX_ "Usage: utf8::valid(sv)"); | |
405 | { | |
406 | SV * sv = ST(0); | |
407 | { | |
408 | STRLEN len; | |
c501bbfe AL |
409 | const char *s = SvPV(sv,len); |
410 | if (!SvUTF8(sv) || is_utf8_string((const U8*)s,len)) | |
18729d3e JH |
411 | XSRETURN_YES; |
412 | else | |
413 | XSRETURN_NO; | |
414 | } | |
415 | } | |
416 | XSRETURN_EMPTY; | |
1b026014 NIS |
417 | } |
418 | ||
419 | XS(XS_utf8_encode) | |
420 | { | |
421 | dXSARGS; | |
422 | if (items != 1) | |
423 | Perl_croak(aTHX_ "Usage: utf8::encode(sv)"); | |
424 | { | |
425 | SV * sv = ST(0); | |
426 | ||
427 | sv_utf8_encode(sv); | |
428 | } | |
429 | XSRETURN_EMPTY; | |
430 | } | |
431 | ||
432 | XS(XS_utf8_decode) | |
433 | { | |
434 | dXSARGS; | |
435 | if (items != 1) | |
436 | Perl_croak(aTHX_ "Usage: utf8::decode(sv)"); | |
437 | { | |
438 | SV * sv = ST(0); | |
c501bbfe | 439 | const bool RETVAL = sv_utf8_decode(sv); |
1b026014 NIS |
440 | ST(0) = boolSV(RETVAL); |
441 | sv_2mortal(ST(0)); | |
442 | } | |
443 | XSRETURN(1); | |
444 | } | |
445 | ||
446 | XS(XS_utf8_upgrade) | |
447 | { | |
448 | dXSARGS; | |
449 | if (items != 1) | |
450 | Perl_croak(aTHX_ "Usage: utf8::upgrade(sv)"); | |
451 | { | |
452 | SV * sv = ST(0); | |
453 | STRLEN RETVAL; | |
454 | dXSTARG; | |
455 | ||
456 | RETVAL = sv_utf8_upgrade(sv); | |
457 | XSprePUSH; PUSHi((IV)RETVAL); | |
458 | } | |
459 | XSRETURN(1); | |
460 | } | |
461 | ||
462 | XS(XS_utf8_downgrade) | |
463 | { | |
464 | dXSARGS; | |
465 | if (items < 1 || items > 2) | |
466 | Perl_croak(aTHX_ "Usage: utf8::downgrade(sv, failok=0)"); | |
467 | { | |
468 | SV * sv = ST(0); | |
c501bbfe AL |
469 | const bool failok = (items < 2) ? 0 : (int)SvIV(ST(1)); |
470 | const bool RETVAL = sv_utf8_downgrade(sv, failok); | |
1b026014 | 471 | |
1b026014 NIS |
472 | ST(0) = boolSV(RETVAL); |
473 | sv_2mortal(ST(0)); | |
474 | } | |
475 | XSRETURN(1); | |
476 | } | |
477 | ||
478 | XS(XS_utf8_native_to_unicode) | |
479 | { | |
480 | dXSARGS; | |
c501bbfe | 481 | const UV uv = SvUV(ST(0)); |
b7953727 JH |
482 | |
483 | if (items > 1) | |
484 | Perl_croak(aTHX_ "Usage: utf8::native_to_unicode(sv)"); | |
485 | ||
1b026014 NIS |
486 | ST(0) = sv_2mortal(newSViv(NATIVE_TO_UNI(uv))); |
487 | XSRETURN(1); | |
488 | } | |
489 | ||
490 | XS(XS_utf8_unicode_to_native) | |
491 | { | |
492 | dXSARGS; | |
c501bbfe | 493 | const UV uv = SvUV(ST(0)); |
b7953727 JH |
494 | |
495 | if (items > 1) | |
496 | Perl_croak(aTHX_ "Usage: utf8::unicode_to_native(sv)"); | |
497 | ||
1b026014 NIS |
498 | ST(0) = sv_2mortal(newSViv(UNI_TO_NATIVE(uv))); |
499 | XSRETURN(1); | |
500 | } | |
501 | ||
14a976d6 | 502 | XS(XS_Internals_SvREADONLY) /* This is dangerous stuff. */ |
29569577 JH |
503 | { |
504 | dXSARGS; | |
505 | SV *sv = SvRV(ST(0)); | |
c501bbfe | 506 | |
29569577 JH |
507 | if (items == 1) { |
508 | if (SvREADONLY(sv)) | |
509 | XSRETURN_YES; | |
510 | else | |
511 | XSRETURN_NO; | |
512 | } | |
513 | else if (items == 2) { | |
514 | if (SvTRUE(ST(1))) { | |
515 | SvREADONLY_on(sv); | |
516 | XSRETURN_YES; | |
517 | } | |
518 | else { | |
14a976d6 | 519 | /* I hope you really know what you are doing. */ |
29569577 JH |
520 | SvREADONLY_off(sv); |
521 | XSRETURN_NO; | |
522 | } | |
523 | } | |
14a976d6 | 524 | XSRETURN_UNDEF; /* Can't happen. */ |
29569577 JH |
525 | } |
526 | ||
14a976d6 | 527 | XS(XS_Internals_SvREFCNT) /* This is dangerous stuff. */ |
29569577 JH |
528 | { |
529 | dXSARGS; | |
530 | SV *sv = SvRV(ST(0)); | |
c501bbfe | 531 | |
29569577 | 532 | if (items == 1) |
14a976d6 | 533 | XSRETURN_IV(SvREFCNT(sv) - 1); /* Minus the ref created for us. */ |
29569577 | 534 | else if (items == 2) { |
14a976d6 | 535 | /* I hope you really know what you are doing. */ |
29569577 JH |
536 | SvREFCNT(sv) = SvIV(ST(1)); |
537 | XSRETURN_IV(SvREFCNT(sv)); | |
538 | } | |
14a976d6 | 539 | XSRETURN_UNDEF; /* Can't happen. */ |
29569577 JH |
540 | } |
541 | ||
f044d0d1 | 542 | XS(XS_Internals_hv_clear_placehold) |
dfd4ef2f NC |
543 | { |
544 | dXSARGS; | |
545 | HV *hv = (HV *) SvRV(ST(0)); | |
c501bbfe | 546 | |
704547c4 AB |
547 | if (items != 1) |
548 | Perl_croak(aTHX_ "Usage: UNIVERSAL::hv_clear_placeholders(hv)"); | |
549 | hv_clear_placeholders(hv); | |
dfd4ef2f NC |
550 | XSRETURN(0); |
551 | } | |
5095c3e6 | 552 | |
5e8f8cda JH |
553 | XS(XS_Regexp_DESTROY) |
554 | { | |
5e8f8cda JH |
555 | } |
556 | ||
5095c3e6 JH |
557 | XS(XS_PerlIO_get_layers) |
558 | { | |
559 | dXSARGS; | |
560 | if (items < 1 || items % 2 == 0) | |
561 | Perl_croak(aTHX_ "Usage: PerlIO_get_layers(filehandle[,args])"); | |
e0dae7fe | 562 | #ifdef USE_PERLIO |
5095c3e6 JH |
563 | { |
564 | SV * sv; | |
565 | GV * gv; | |
566 | IO * io; | |
567 | bool input = TRUE; | |
568 | bool details = FALSE; | |
569 | ||
570 | if (items > 1) { | |
5095c3e6 JH |
571 | SV **svp; |
572 | ||
573 | for (svp = MARK + 2; svp <= SP; svp += 2) { | |
574 | SV **varp = svp; | |
575 | SV **valp = svp + 1; | |
576 | STRLEN klen; | |
c501bbfe | 577 | const char *key = SvPV(*varp, klen); |
5095c3e6 JH |
578 | |
579 | switch (*key) { | |
580 | case 'i': | |
581 | if (klen == 5 && memEQ(key, "input", 5)) { | |
582 | input = SvTRUE(*valp); | |
583 | break; | |
584 | } | |
585 | goto fail; | |
586 | case 'o': | |
587 | if (klen == 6 && memEQ(key, "output", 6)) { | |
588 | input = !SvTRUE(*valp); | |
589 | break; | |
590 | } | |
591 | goto fail; | |
592 | case 'd': | |
593 | if (klen == 7 && memEQ(key, "details", 7)) { | |
594 | details = SvTRUE(*valp); | |
595 | break; | |
596 | } | |
597 | goto fail; | |
598 | default: | |
599 | fail: | |
600 | Perl_croak(aTHX_ | |
601 | "get_layers: unknown argument '%s'", | |
602 | key); | |
603 | } | |
604 | } | |
605 | ||
606 | SP -= (items - 1); | |
607 | } | |
608 | ||
609 | sv = POPs; | |
610 | gv = (GV*)sv; | |
611 | ||
612 | if (!isGV(sv)) { | |
613 | if (SvROK(sv) && isGV(SvRV(sv))) | |
614 | gv = (GV*)SvRV(sv); | |
615 | else | |
616 | gv = gv_fetchpv(SvPVX(sv), FALSE, SVt_PVIO); | |
617 | } | |
618 | ||
619 | if (gv && (io = GvIO(gv))) { | |
620 | dTARGET; | |
621 | AV* av = PerlIO_get_layers(aTHX_ input ? | |
622 | IoIFP(io) : IoOFP(io)); | |
623 | I32 i; | |
624 | I32 last = av_len(av); | |
625 | I32 nitem = 0; | |
626 | ||
627 | for (i = last; i >= 0; i -= 3) { | |
628 | SV **namsvp; | |
629 | SV **argsvp; | |
630 | SV **flgsvp; | |
631 | bool namok, argok, flgok; | |
632 | ||
633 | namsvp = av_fetch(av, i - 2, FALSE); | |
634 | argsvp = av_fetch(av, i - 1, FALSE); | |
635 | flgsvp = av_fetch(av, i, FALSE); | |
636 | ||
637 | namok = namsvp && *namsvp && SvPOK(*namsvp); | |
638 | argok = argsvp && *argsvp && SvPOK(*argsvp); | |
639 | flgok = flgsvp && *flgsvp && SvIOK(*flgsvp); | |
640 | ||
641 | if (details) { | |
642 | XPUSHs(namok ? | |
5e7e76a3 | 643 | newSVpv(SvPVX_const(*namsvp), 0) : &PL_sv_undef); |
5095c3e6 | 644 | XPUSHs(argok ? |
5e7e76a3 | 645 | newSVpv(SvPVX_const(*argsvp), 0) : &PL_sv_undef); |
5095c3e6 JH |
646 | if (flgok) |
647 | XPUSHi(SvIVX(*flgsvp)); | |
648 | else | |
649 | XPUSHs(&PL_sv_undef); | |
650 | nitem += 3; | |
651 | } | |
652 | else { | |
653 | if (namok && argok) | |
654 | XPUSHs(Perl_newSVpvf(aTHX_ "%"SVf"(%"SVf")", | |
655 | *namsvp, *argsvp)); | |
656 | else if (namok) | |
657 | XPUSHs(Perl_newSVpvf(aTHX_ "%"SVf, *namsvp)); | |
658 | else | |
659 | XPUSHs(&PL_sv_undef); | |
660 | nitem++; | |
661 | if (flgok) { | |
662 | IV flags = SvIVX(*flgsvp); | |
663 | ||
664 | if (flags & PERLIO_F_UTF8) { | |
665 | XPUSHs(newSVpvn("utf8", 4)); | |
666 | nitem++; | |
667 | } | |
668 | } | |
669 | } | |
670 | } | |
671 | ||
672 | SvREFCNT_dec(av); | |
673 | ||
674 | XSRETURN(nitem); | |
675 | } | |
676 | } | |
e0dae7fe | 677 | #endif |
5095c3e6 JH |
678 | |
679 | XSRETURN(0); | |
680 | } | |
681 | ||
108e6616 | 682 | XS(XS_Internals_hash_seed) |
e8e58922 | 683 | { |
108e6616 NC |
684 | /* Using dXSARGS would also have dITEM and dSP, |
685 | * which define 2 unused local variables. */ | |
e503e849 | 686 | dAXMARK; |
4a04c497 | 687 | XSRETURN_UV(PERL_HASH_SEED); |
e8e58922 JH |
688 | } |
689 | ||
7f047bfa | 690 | XS(XS_Internals_rehash_seed) |
6c2cec5b NC |
691 | { |
692 | /* Using dXSARGS would also have dITEM and dSP, | |
693 | * which define 2 unused local variables. */ | |
e503e849 | 694 | dAXMARK; |
7f047bfa | 695 | XSRETURN_UV(PL_rehash_seed); |
6c2cec5b NC |
696 | } |
697 | ||
cdeba5a7 NC |
698 | XS(XS_Internals_HvREHASH) /* Subject to change */ |
699 | { | |
700 | dXSARGS; | |
701 | if (SvROK(ST(0))) { | |
c501bbfe | 702 | const HV *hv = (HV *) SvRV(ST(0)); |
cdeba5a7 NC |
703 | if (items == 1 && SvTYPE(hv) == SVt_PVHV) { |
704 | if (HvREHASH(hv)) | |
705 | XSRETURN_YES; | |
706 | else | |
707 | XSRETURN_NO; | |
708 | } | |
709 | } | |
710 | Perl_croak(aTHX_ "Internals::HvREHASH $hashref"); | |
711 | } | |
583439ab NC |
712 | |
713 | /* | |
714 | * Local variables: | |
715 | * c-indentation-style: bsd | |
716 | * c-basic-offset: 4 | |
717 | * indent-tabs-mode: t | |
718 | * End: | |
719 | * | |
d8294a4d NC |
720 | * ex: set ts=8 sts=4 sw=4 noet: |
721 | */ |