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 * |
301daebc |
11 | S_isa_lookup(pTHX_ HV *stash, const char *name, HV* name_stash, |
12 | int len, int level) |
6d4a7be2 |
13 | { |
14 | AV* av; |
15 | GV* gv; |
16 | GV** gvp; |
17 | HV* hv = Nullhv; |
46e4b22b |
18 | SV* subgen = Nullsv; |
6d4a7be2 |
19 | |
301daebc |
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 |
27 | |
28 | if (level > 100) |
46e4b22b |
29 | Perl_croak(aTHX_ "Recursive inheritance detected in package '%s'", |
30 | HvNAME(stash)); |
6d4a7be2 |
31 | |
32 | gvp = (GV**)hv_fetch(stash, "::ISA::CACHE::", 14, FALSE); |
33 | |
46e4b22b |
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 |
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 |
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 |
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 |
74 | /* NOTE: No support for tied ISA */ |
75 | I32 items = AvFILLp(av) + 1; |
6d4a7be2 |
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 |
83 | SvPVX(sv), HvNAME(stash)); |
84 | continue; |
85 | } |
301daebc |
86 | if (&PL_sv_yes == isa_lookup(basestash, name, name_stash, |
87 | len, level + 1)) { |
3280af22 |
88 | (void)hv_store(hv,name,len,&PL_sv_yes,0); |
89 | return &PL_sv_yes; |
6d4a7be2 |
90 | } |
91 | } |
3280af22 |
92 | (void)hv_store(hv,name,len,&PL_sv_no,0); |
6d4a7be2 |
93 | } |
94 | } |
95 | |
e09f3e01 |
96 | return boolSV(strEQ(name, "UNIVERSAL")); |
6d4a7be2 |
97 | } |
98 | |
954c1994 |
99 | /* |
ccfc67b7 |
100 | =head1 SV Manipulation Functions |
101 | |
954c1994 |
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 |
114 | char *type; |
115 | HV *stash; |
301daebc |
116 | HV *name_stash; |
46e4b22b |
117 | |
55497cff |
118 | stash = Nullhv; |
119 | type = Nullch; |
46e4b22b |
120 | |
55497cff |
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 |
128 | stash = SvSTASH(sv); |
129 | } |
130 | else { |
131 | stash = gv_stashsv(sv, FALSE); |
132 | } |
46e4b22b |
133 | |
301daebc |
134 | name_stash = gv_stashpv(name, FALSE); |
135 | |
55497cff |
136 | return (type && strEQ(type,name)) || |
301daebc |
137 | (stash && isa_lookup(stash, name, name_stash, strlen(name), 0) |
138 | == &PL_sv_yes) |
55497cff |
139 | ? TRUE |
140 | : FALSE ; |
55497cff |
141 | } |
142 | |
1b026014 |
143 | #include "XSUB.h" |
144 | |
acfe0abc |
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 |
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 |
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 |
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 |
173 | } |
174 | |
55497cff |
175 | |
6d4a7be2 |
176 | XS(XS_UNIVERSAL_isa) |
177 | { |
178 | dXSARGS; |
55497cff |
179 | SV *sv; |
180 | char *name; |
2d8e6c8d |
181 | STRLEN n_a; |
6d4a7be2 |
182 | |
183 | if (items != 2) |
cea2e8a9 |
184 | Perl_croak(aTHX_ "Usage: UNIVERSAL::isa(reference, kind)"); |
6d4a7be2 |
185 | |
186 | sv = ST(0); |
f8f70380 |
187 | |
d3f7f2b2 |
188 | if (SvGMAGICAL(sv)) |
189 | mg_get(sv); |
190 | |
aca069ec |
191 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)))) |
f8f70380 |
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 |
197 | XSRETURN(1); |
198 | } |
199 | |
6d4a7be2 |
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 |
208 | |
209 | if (items != 2) |
cea2e8a9 |
210 | Perl_croak(aTHX_ "Usage: UNIVERSAL::can(object-ref, method)"); |
6d4a7be2 |
211 | |
212 | sv = ST(0); |
f8f70380 |
213 | |
d3f7f2b2 |
214 | if (SvGMAGICAL(sv)) |
215 | mg_get(sv); |
216 | |
aca069ec |
217 | if (!SvOK(sv) || !(SvROK(sv) || (SvPOK(sv) && SvCUR(sv)))) |
f8f70380 |
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 |
226 | pkg = SvSTASH(sv); |
227 | } |
228 | else { |
229 | pkg = gv_stashsv(sv, FALSE); |
230 | } |
231 | |
232 | if (pkg) { |
dc848c6f |
233 | GV *gv = gv_fetchmethod_autoload(pkg, name, FALSE); |
234 | if (gv && isGV(gv)) |
235 | rv = sv_2mortal(newRV((SV*)GvCV(gv))); |
6d4a7be2 |
236 | } |
237 | |
238 | ST(0) = rv; |
239 | XSRETURN(1); |
240 | } |
241 | |
6d4a7be2 |
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 |
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 |
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 |
271 | undef = "(undef)"; |
272 | } |
273 | |
1571675a |
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 |
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 |
295 | Perl_croak(aTHX_ "%s v%"VDf" required--" |
296 | "this is only v%"VDf, |
1571675a |
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 |
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 |
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 |
324 | ST(0) = sv; |
325 | |
326 | XSRETURN(1); |
327 | } |
328 | |
1b026014 |
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 |
420 | |
421 | if (items > 1) |
422 | Perl_croak(aTHX_ "Usage: utf8::native_to_unicode(sv)"); |
423 | |
1b026014 |
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 |
432 | |
433 | if (items > 1) |
434 | Perl_croak(aTHX_ "Usage: utf8::unicode_to_native(sv)"); |
435 | |
1b026014 |
436 | ST(0) = sv_2mortal(newSViv(UNI_TO_NATIVE(uv))); |
437 | XSRETURN(1); |
438 | } |
439 | |
1b1f1335 |
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 | |