Commit | Line | Data |
---|---|---|
6d4a7be2 | 1 | #include "EXTERN.h" |
864dbfa3 | 2 | #define PERL_IN_UNIVERSAL_C |
6d4a7be2 | 3 | #include "perl.h" |
6d4a7be2 PP |
4 | |
5 | /* | |
6 | * Contributed by Graham Barr <Graham.Barr@tiuk.ti.com> | |
7 | * The main guts of traverse_isa was actually copied from gv_fetchmeth | |
8 | */ | |
9 | ||
76e3520e | 10 | STATIC SV * |
301daebc MS |
11 | S_isa_lookup(pTHX_ HV *stash, const char *name, HV* name_stash, |
12 | int len, int level) | |
6d4a7be2 PP |
13 | { |
14 | AV* av; | |
15 | GV* gv; | |
16 | GV** gvp; | |
17 | HV* hv = Nullhv; | |
46e4b22b | 18 | SV* subgen = Nullsv; |
6d4a7be2 | 19 | |
301daebc MS |
20 | /* A stash/class can go by many names (ie. User == main::User), so |
21 | we compare the stash itself just in case */ | |
22 | if (name_stash && (stash == name_stash)) | |
23 | return &PL_sv_yes; | |
6d4a7be2 | 24 | |
46e4b22b | 25 | if (strEQ(HvNAME(stash), name)) |
3280af22 | 26 | return &PL_sv_yes; |
6d4a7be2 PP |
27 | |
28 | if (level > 100) | |
46e4b22b GS |
29 | Perl_croak(aTHX_ "Recursive inheritance detected in package '%s'", |
30 | HvNAME(stash)); | |
6d4a7be2 PP |
31 | |
32 | gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, FALSE); | |
33 | ||
46e4b22b GS |
34 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (subgen = GvSV(gv)) |
35 | && (hv = GvHV(gv))) | |
36 | { | |
37 | if (SvIV(subgen) == PL_sub_generation) { | |
38 | SV* sv; | |
39 | SV** svp = (SV**)hv_fetch(hv, name, len, FALSE); | |
40 | if (svp && (sv = *svp) != (SV*)&PL_sv_undef) { | |
41 | DEBUG_o( Perl_deb(aTHX_ "Using cached ISA %s for package %s\n", | |
42 | name, HvNAME(stash)) ); | |
43 | return sv; | |
44 | } | |
45 | } | |
46 | else { | |
47 | DEBUG_o( Perl_deb(aTHX_ "ISA Cache in package %s is stale\n", | |
48 | HvNAME(stash)) ); | |
49 | hv_clear(hv); | |
50 | sv_setiv(subgen, PL_sub_generation); | |
51 | } | |
6d4a7be2 PP |
52 | } |
53 | ||
54 | gvp = (GV**)hv_fetch(stash,"ISA",3,FALSE); | |
46e4b22b | 55 | |
3280af22 | 56 | if (gvp && (gv = *gvp) != (GV*)&PL_sv_undef && (av = GvAV(gv))) { |
46e4b22b | 57 | if (!hv || !subgen) { |
6d4a7be2 PP |
58 | gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, TRUE); |
59 | ||
60 | gv = *gvp; | |
61 | ||
62 | if (SvTYPE(gv) != SVt_PVGV) | |
63 | gv_init(gv, stash, "::ISA::CACHE::", 14, TRUE); | |
64 | ||
46e4b22b GS |
65 | if (!hv) |
66 | hv = GvHVn(gv); | |
67 | if (!subgen) { | |
68 | subgen = newSViv(PL_sub_generation); | |
69 | GvSV(gv) = subgen; | |
70 | } | |
6d4a7be2 | 71 | } |
46e4b22b | 72 | if (hv) { |
6d4a7be2 | 73 | SV** svp = AvARRAY(av); |
93965878 NIS |
74 | /* NOTE: No support for tied ISA */ |
75 | I32 items = AvFILLp(av) + 1; | |
6d4a7be2 PP |
76 | while (items--) { |
77 | SV* sv = *svp++; | |
78 | HV* basestash = gv_stashsv(sv, FALSE); | |
79 | if (!basestash) { | |
599cee73 | 80 | if (ckWARN(WARN_MISC)) |
cea2e8a9 | 81 | Perl_warner(aTHX_ WARN_SYNTAX, |
599cee73 | 82 | "Can't locate package %s for @%s::ISA", |
6d4a7be2 PP |
83 | SvPVX(sv), HvNAME(stash)); |
84 | continue; | |
85 | } | |
301daebc MS |
86 | if (&PL_sv_yes == isa_lookup(basestash, name, name_stash, |
87 | len, level + 1)) { | |
3280af22 NIS |
88 | (void)hv_store(hv,name,len,&PL_sv_yes,0); |
89 | return &PL_sv_yes; | |
6d4a7be2 PP |
90 | } |
91 | } | |
3280af22 | 92 | (void)hv_store(hv,name,len,&PL_sv_no,0); |
6d4a7be2 PP |
93 | } |
94 | } | |
95 | ||
e09f3e01 | 96 | return boolSV(strEQ(name, "UNIVERSAL")); |
6d4a7be2 PP |
97 | } |
98 | ||
954c1994 | 99 | /* |
ccfc67b7 JH |
100 | =head1 SV Manipulation Functions |
101 | ||
954c1994 GS |
102 | =for apidoc sv_derived_from |
103 | ||
104 | Returns a boolean indicating whether the SV is derived from the specified | |
105 | class. This is the function that implements C<UNIVERSAL::isa>. It works | |
106 | for class names as well as for objects. | |
107 | ||
108 | =cut | |
109 | */ | |
110 | ||
55497cff | 111 | bool |
864dbfa3 | 112 | Perl_sv_derived_from(pTHX_ SV *sv, const char *name) |
55497cff | 113 | { |
55497cff PP |
114 | char *type; |
115 | HV *stash; | |
301daebc | 116 | HV *name_stash; |
46e4b22b | 117 | |
55497cff PP |
118 | stash = Nullhv; |
119 | type = Nullch; | |
46e4b22b | 120 | |
55497cff PP |
121 | if (SvGMAGICAL(sv)) |
122 | mg_get(sv) ; | |
123 | ||
124 | if (SvROK(sv)) { | |
125 | sv = SvRV(sv); | |
126 | type = sv_reftype(sv,0); | |
46e4b22b | 127 | if (SvOBJECT(sv)) |
55497cff PP |
128 | stash = SvSTASH(sv); |
129 | } | |
130 | else { | |
131 | stash = gv_stashsv(sv, FALSE); | |
132 | } | |
46e4b22b | 133 | |
301daebc MS |
134 | name_stash = gv_stashpv(name, FALSE); |
135 | ||
55497cff | 136 | return (type && strEQ(type,name)) || |
301daebc MS |
137 | (stash && isa_lookup(stash, name, name_stash, strlen(name), 0) |
138 | == &PL_sv_yes) | |
55497cff PP |
139 | ? TRUE |
140 | : FALSE ; | |
55497cff PP |
141 | } |
142 | ||
1b026014 NIS |
143 | #include "XSUB.h" |
144 | ||
acfe0abc GS |
145 | void XS_UNIVERSAL_isa(pTHX_ CV *cv); |
146 | void XS_UNIVERSAL_can(pTHX_ CV *cv); | |
147 | void XS_UNIVERSAL_VERSION(pTHX_ CV *cv); | |
1b026014 NIS |
148 | XS(XS_utf8_valid); |
149 | XS(XS_utf8_encode); | |
150 | XS(XS_utf8_decode); | |
151 | XS(XS_utf8_upgrade); | |
152 | XS(XS_utf8_downgrade); | |
153 | XS(XS_utf8_unicode_to_native); | |
154 | XS(XS_utf8_native_to_unicode); | |
1b1f1335 | 155 | XS(XS_access_readonly); |
0cb96387 GS |
156 | |
157 | void | |
158 | Perl_boot_core_UNIVERSAL(pTHX) | |
159 | { | |
160 | char *file = __FILE__; | |
161 | ||
162 | newXS("UNIVERSAL::isa", XS_UNIVERSAL_isa, file); | |
163 | newXS("UNIVERSAL::can", XS_UNIVERSAL_can, file); | |
164 | newXS("UNIVERSAL::VERSION", XS_UNIVERSAL_VERSION, file); | |
1b026014 NIS |
165 | newXS("utf8::valid", XS_utf8_valid, file); |
166 | newXS("utf8::encode", XS_utf8_encode, file); | |
167 | newXS("utf8::decode", XS_utf8_decode, file); | |
168 | newXS("utf8::upgrade", XS_utf8_upgrade, file); | |
169 | newXS("utf8::downgrade", XS_utf8_downgrade, file); | |
170 | newXS("utf8::native_to_unicode", XS_utf8_native_to_unicode, file); | |
171 | newXS("utf8::unicode_to_native", XS_utf8_unicode_to_native, file); | |
1b1f1335 | 172 | newXSproto("access::readonly",XS_access_readonly, file, "\\[$%@];$"); |
0cb96387 GS |
173 | } |
174 | ||
55497cff | 175 | |
6d4a7be2 PP |
176 | XS(XS_UNIVERSAL_isa) |
177 | { | |
178 | dXSARGS; | |
55497cff PP |
179 | SV *sv; |
180 | char *name; | |
2d8e6c8d | 181 | STRLEN n_a; |
6d4a7be2 PP |
182 | |
183 | if (items != 2) | |
cea2e8a9 | 184 | Perl_croak(aTHX_ "Usage: UNIVERSAL::isa(reference, kind)"); |
6d4a7be2 PP |
185 | |
186 | sv = ST(0); | |
f8f70380 | 187 | |
d3f7f2b2 GS |
188 | if (SvGMAGICAL(sv)) |
189 | mg_get(sv); | |
190 | ||
aca069ec | 191 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)))) |
f8f70380 GS |
192 | XSRETURN_UNDEF; |
193 | ||
2d8e6c8d | 194 | name = (char *)SvPV(ST(1),n_a); |
6d4a7be2 | 195 | |
54310121 | 196 | ST(0) = boolSV(sv_derived_from(sv, name)); |
6d4a7be2 PP |
197 | XSRETURN(1); |
198 | } | |
199 | ||
6d4a7be2 PP |
200 | XS(XS_UNIVERSAL_can) |
201 | { | |
202 | dXSARGS; | |
203 | SV *sv; | |
204 | char *name; | |
205 | SV *rv; | |
6f08146e | 206 | HV *pkg = NULL; |
2d8e6c8d | 207 | STRLEN n_a; |
6d4a7be2 PP |
208 | |
209 | if (items != 2) | |
cea2e8a9 | 210 | Perl_croak(aTHX_ "Usage: UNIVERSAL::can(object-ref, method)"); |
6d4a7be2 PP |
211 | |
212 | sv = ST(0); | |
f8f70380 | 213 | |
d3f7f2b2 GS |
214 | if (SvGMAGICAL(sv)) |
215 | mg_get(sv); | |
216 | ||
aca069ec | 217 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)))) |
f8f70380 GS |
218 | XSRETURN_UNDEF; |
219 | ||
2d8e6c8d | 220 | name = (char *)SvPV(ST(1),n_a); |
3280af22 | 221 | rv = &PL_sv_undef; |
6d4a7be2 | 222 | |
46e4b22b | 223 | if (SvROK(sv)) { |
6f08146e | 224 | sv = (SV*)SvRV(sv); |
46e4b22b | 225 | if (SvOBJECT(sv)) |
6f08146e NIS |
226 | pkg = SvSTASH(sv); |
227 | } | |
228 | else { | |
229 | pkg = gv_stashsv(sv, FALSE); | |
230 | } | |
231 | ||
232 | if (pkg) { | |
dc848c6f PP |
233 | GV *gv = gv_fetchmethod_autoload(pkg, name, FALSE); |
234 | if (gv && isGV(gv)) | |
235 | rv = sv_2mortal(newRV((SV*)GvCV(gv))); | |
6d4a7be2 PP |
236 | } |
237 | ||
238 | ST(0) = rv; | |
239 | XSRETURN(1); | |
240 | } | |
241 | ||
6d4a7be2 PP |
242 | XS(XS_UNIVERSAL_VERSION) |
243 | { | |
244 | dXSARGS; | |
245 | HV *pkg; | |
246 | GV **gvp; | |
247 | GV *gv; | |
248 | SV *sv; | |
249 | char *undef; | |
250 | ||
1571675a | 251 | if (SvROK(ST(0))) { |
6d4a7be2 | 252 | sv = (SV*)SvRV(ST(0)); |
1571675a | 253 | if (!SvOBJECT(sv)) |
cea2e8a9 | 254 | Perl_croak(aTHX_ "Cannot find version of an unblessed reference"); |
6d4a7be2 PP |
255 | pkg = SvSTASH(sv); |
256 | } | |
257 | else { | |
258 | pkg = gv_stashsv(ST(0), FALSE); | |
259 | } | |
260 | ||
261 | gvp = pkg ? (GV**)hv_fetch(pkg,"VERSION",7,FALSE) : Null(GV**); | |
262 | ||
d4bea2fb | 263 | if (gvp && isGV(gv = *gvp) && SvOK(sv = GvSV(gv))) { |
6d4a7be2 PP |
264 | SV *nsv = sv_newmortal(); |
265 | sv_setsv(nsv, sv); | |
266 | sv = nsv; | |
267 | undef = Nullch; | |
268 | } | |
269 | else { | |
3280af22 | 270 | sv = (SV*)&PL_sv_undef; |
6d4a7be2 PP |
271 | undef = "(undef)"; |
272 | } | |
273 | ||
1571675a GS |
274 | if (items > 1) { |
275 | STRLEN len; | |
276 | SV *req = ST(1); | |
277 | ||
278 | if (undef) | |
279 | Perl_croak(aTHX_ "%s does not define $%s::VERSION--version check failed", | |
280 | HvNAME(pkg), HvNAME(pkg)); | |
281 | ||
282 | if (!SvNIOK(sv) && SvPOK(sv)) { | |
283 | char *str = SvPVx(sv,len); | |
284 | while (len) { | |
285 | --len; | |
286 | /* XXX could DWIM "1.2.3" here */ | |
287 | if (!isDIGIT(str[len]) && str[len] != '.' && str[len] != '_') | |
288 | break; | |
289 | } | |
290 | if (len) { | |
4305d8ab | 291 | if (SvNOK(req) && SvPOK(req)) { |
1571675a GS |
292 | /* they said C<use Foo v1.2.3> and $Foo::VERSION |
293 | * doesn't look like a float: do string compare */ | |
294 | if (sv_cmp(req,sv) == 1) { | |
d2560b70 RB |
295 | Perl_croak(aTHX_ "%s v%"VDf" required--" |
296 | "this is only v%"VDf, | |
1571675a GS |
297 | HvNAME(pkg), req, sv); |
298 | } | |
299 | goto finish; | |
300 | } | |
301 | /* they said C<use Foo 1.002_003> and $Foo::VERSION | |
302 | * doesn't look like a float: force numeric compare */ | |
155aba94 | 303 | (void)SvUPGRADE(sv, SVt_PVNV); |
1571675a GS |
304 | SvNVX(sv) = str_to_version(sv); |
305 | SvPOK_off(sv); | |
306 | SvNOK_on(sv); | |
307 | } | |
308 | } | |
309 | /* if we get here, we're looking for a numeric comparison, | |
310 | * so force the required version into a float, even if they | |
311 | * said C<use Foo v1.2.3> */ | |
4305d8ab | 312 | if (SvNOK(req) && SvPOK(req)) { |
1571675a GS |
313 | NV n = SvNV(req); |
314 | req = sv_newmortal(); | |
315 | sv_setnv(req, n); | |
316 | } | |
317 | ||
f6eb1a96 | 318 | if (SvNV(req) > SvNV(sv)) |
1571675a | 319 | Perl_croak(aTHX_ "%s version %s required--this is only version %s", |
f6eb1a96 | 320 | HvNAME(pkg), SvPV_nolen(req), SvPV_nolen(sv)); |
2d8e6c8d | 321 | } |
6d4a7be2 | 322 | |
1571675a | 323 | finish: |
6d4a7be2 PP |
324 | ST(0) = sv; |
325 | ||
326 | XSRETURN(1); | |
327 | } | |
328 | ||
1b026014 NIS |
329 | XS(XS_utf8_valid) |
330 | { | |
331 | dXSARGS; | |
332 | if (items != 1) | |
333 | Perl_croak(aTHX_ "Usage: utf8::valid(sv)"); | |
334 | { | |
335 | SV * sv = ST(0); | |
336 | { | |
337 | STRLEN len; | |
338 | char *s = SvPV(sv,len); | |
339 | if (!SvUTF8(sv) || is_utf8_string((U8*)s,len)) | |
340 | XSRETURN_YES; | |
341 | else | |
342 | XSRETURN_NO; | |
343 | } | |
344 | } | |
345 | XSRETURN_EMPTY; | |
346 | } | |
347 | ||
348 | XS(XS_utf8_encode) | |
349 | { | |
350 | dXSARGS; | |
351 | if (items != 1) | |
352 | Perl_croak(aTHX_ "Usage: utf8::encode(sv)"); | |
353 | { | |
354 | SV * sv = ST(0); | |
355 | ||
356 | sv_utf8_encode(sv); | |
357 | } | |
358 | XSRETURN_EMPTY; | |
359 | } | |
360 | ||
361 | XS(XS_utf8_decode) | |
362 | { | |
363 | dXSARGS; | |
364 | if (items != 1) | |
365 | Perl_croak(aTHX_ "Usage: utf8::decode(sv)"); | |
366 | { | |
367 | SV * sv = ST(0); | |
368 | bool RETVAL; | |
369 | ||
370 | RETVAL = sv_utf8_decode(sv); | |
371 | ST(0) = boolSV(RETVAL); | |
372 | sv_2mortal(ST(0)); | |
373 | } | |
374 | XSRETURN(1); | |
375 | } | |
376 | ||
377 | XS(XS_utf8_upgrade) | |
378 | { | |
379 | dXSARGS; | |
380 | if (items != 1) | |
381 | Perl_croak(aTHX_ "Usage: utf8::upgrade(sv)"); | |
382 | { | |
383 | SV * sv = ST(0); | |
384 | STRLEN RETVAL; | |
385 | dXSTARG; | |
386 | ||
387 | RETVAL = sv_utf8_upgrade(sv); | |
388 | XSprePUSH; PUSHi((IV)RETVAL); | |
389 | } | |
390 | XSRETURN(1); | |
391 | } | |
392 | ||
393 | XS(XS_utf8_downgrade) | |
394 | { | |
395 | dXSARGS; | |
396 | if (items < 1 || items > 2) | |
397 | Perl_croak(aTHX_ "Usage: utf8::downgrade(sv, failok=0)"); | |
398 | { | |
399 | SV * sv = ST(0); | |
400 | bool failok; | |
401 | bool RETVAL; | |
402 | ||
403 | if (items < 2) | |
404 | failok = 0; | |
405 | else { | |
406 | failok = (int)SvIV(ST(1)); | |
407 | } | |
408 | ||
409 | RETVAL = sv_utf8_downgrade(sv, failok); | |
410 | ST(0) = boolSV(RETVAL); | |
411 | sv_2mortal(ST(0)); | |
412 | } | |
413 | XSRETURN(1); | |
414 | } | |
415 | ||
416 | XS(XS_utf8_native_to_unicode) | |
417 | { | |
418 | dXSARGS; | |
419 | UV uv = SvUV(ST(0)); | |
b7953727 JH |
420 | |
421 | if (items > 1) | |
422 | Perl_croak(aTHX_ "Usage: utf8::native_to_unicode(sv)"); | |
423 | ||
1b026014 NIS |
424 | ST(0) = sv_2mortal(newSViv(NATIVE_TO_UNI(uv))); |
425 | XSRETURN(1); | |
426 | } | |
427 | ||
428 | XS(XS_utf8_unicode_to_native) | |
429 | { | |
430 | dXSARGS; | |
431 | UV uv = SvUV(ST(0)); | |
b7953727 JH |
432 | |
433 | if (items > 1) | |
434 | Perl_croak(aTHX_ "Usage: utf8::unicode_to_native(sv)"); | |
435 | ||
1b026014 NIS |
436 | ST(0) = sv_2mortal(newSViv(UNI_TO_NATIVE(uv))); |
437 | XSRETURN(1); | |
438 | } | |
439 | ||
1b1f1335 NIS |
440 | XS(XS_access_readonly) |
441 | { | |
442 | dXSARGS; | |
443 | SV *sv = SvRV(ST(0)); | |
444 | IV old = SvREADONLY(sv); | |
445 | if (items == 2) { | |
446 | if (SvTRUE(ST(1))) { | |
447 | SvREADONLY_on(sv); | |
448 | } | |
449 | else { | |
450 | SvREADONLY_off(sv); | |
451 | } | |
452 | } | |
453 | if (old) | |
454 | XSRETURN_YES; | |
455 | else | |
456 | XSRETURN_NO; | |
457 | } | |
1b026014 | 458 |