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