Conflicts with the last Moose release
[gitmo/Class-MOP.git] / mop.c
CommitLineData
d846ade3 1#include "mop.h"
2
3void
1be56175 4mop_call_xs (pTHX_ XSPROTO(subaddr), CV *cv, SV **mark)
d846ade3 5{
e3dcef7f 6 dSP;
7 PUSHMARK(mark);
8 (*subaddr)(aTHX_ cv);
9 PUTBACK;
d846ade3 10}
11
12#if PERL_VERSION >= 10
13UV
14mop_check_package_cache_flag (pTHX_ HV *stash)
15{
16 assert(SvTYPE(stash) == SVt_PVHV);
17
18 /* here we're trying to implement a c version of mro::get_pkg_gen($stash),
19 * however the perl core doesn't make it easy for us. It doesn't provide an
20 * api that just does what we want.
21 *
22 * However, we know that the information we want is, inside the core,
23 * available using HvMROMETA(stash)->pkg_gen. Unfortunately, although the
24 * HvMROMETA macro is public, it is implemented using Perl_mro_meta_init,
25 * which is not public and only available inside the core, as the mro
26 * interface as well as the structure returned by mro_meta_init isn't
27 * considered to be stable yet.
28 *
29 * Perl_mro_meta_init isn't declared static, so we could just define it
30 * ourselfs if perls headers don't do that for us, except that won't work
31 * on platforms where symbols need to be explicitly exported when linking
32 * shared libraries.
33 *
34 * So our, hopefully temporary, solution is to be even more evil and
35 * basically reimplement HvMROMETA in a very fragile way that'll blow up
36 * when the relevant parts of the mro implementation in core change.
37 *
38 * :-(
39 *
40 */
41
42 return HvAUX(stash)->xhv_mro_meta
43 ? HvAUX(stash)->xhv_mro_meta->pkg_gen
44 : 0;
45}
46
47#else /* pre 5.10.0 */
48
49UV
50mop_check_package_cache_flag (pTHX_ HV *stash)
51{
52 PERL_UNUSED_ARG(stash);
53 assert(SvTYPE(stash) == SVt_PVHV);
54
55 return PL_sub_generation;
56}
57#endif
58
59SV *
60mop_call0 (pTHX_ SV *const self, SV *const method)
61{
62 dSP;
63 SV *ret;
64
65 PUSHMARK(SP);
66 XPUSHs(self);
67 PUTBACK;
68
69 call_sv(method, G_SCALAR | G_METHOD);
70
71 SPAGAIN;
72 ret = POPs;
73 PUTBACK;
74
75 return ret;
76}
77
78int
e1f52a8a 79mop_get_code_info (SV *coderef, char **pkg, char **name)
d846ade3 80{
81 if (!SvOK(coderef) || !SvROK(coderef) || SvTYPE(SvRV(coderef)) != SVt_PVCV) {
82 return 0;
83 }
84
85 coderef = SvRV(coderef);
caa6b5cd 86
87 /* sub is still being compiled */
88 if (!CvGV(coderef)) {
89 return 0;
90 }
91
d846ade3 92 /* I think this only gets triggered with a mangled coderef, but if
93 we hit it without the guard, we segfault. The slightly odd return
94 value strikes me as an improvement (mst)
95 */
96#ifdef isGV_with_GP
97 if ( isGV_with_GP(CvGV(coderef)) ) {
98#endif
99 *pkg = HvNAME( GvSTASH(CvGV(coderef)) );
100 *name = GvNAME( CvGV(coderef) );
101#ifdef isGV_with_GP
102 } else {
103 *pkg = "__UNKNOWN__";
104 *name = "__ANON__";
105 }
106#endif
107
108 return 1;
109}
110
111void
e1f52a8a 112mop_get_package_symbols (HV *stash, type_filter_t filter, get_package_symbols_cb_t cb, void *ud)
d846ade3 113{
114 HE *he;
115
116 (void)hv_iterinit(stash);
117
118 if (filter == TYPE_FILTER_NONE) {
119 while ( (he = hv_iternext(stash)) ) {
120 STRLEN keylen;
121 const char *key = HePV(he, keylen);
122 if (!cb(key, keylen, HeVAL(he), ud)) {
123 return;
124 }
125 }
126 return;
127 }
128
129 while ( (he = hv_iternext(stash)) ) {
130 SV *const gv = HeVAL(he);
131 SV *sv = NULL;
132 char *key;
133 STRLEN keylen;
134 char *package;
135 SV *fq;
136
137 switch( SvTYPE(gv) ) {
138#ifndef SVt_RV
139 case SVt_RV:
140#endif
141 case SVt_PV:
142 case SVt_IV:
143 /* expand the gv into a real typeglob if it
144 * contains stub functions and we were asked to
145 * return CODE symbols */
146 if (filter == TYPE_FILTER_CODE) {
147 if (SvROK(gv)) {
148 /* we don't really care about the length,
149 but that's the API */
150 key = HePV(he, keylen);
151 package = HvNAME(stash);
152 fq = newSVpvf("%s::%s", package, key);
153 sv = (SV *)get_cv(SvPV_nolen(fq), 0);
154 break;
155 }
156
157 key = HePV(he, keylen);
158 gv_init((GV *)gv, stash, key, keylen, GV_ADDMULTI);
159 }
160 /* fall through */
161 case SVt_PVGV:
162 switch (filter) {
163 case TYPE_FILTER_CODE: sv = (SV *)GvCVu(gv); break;
164 case TYPE_FILTER_ARRAY: sv = (SV *)GvAV(gv); break;
165 case TYPE_FILTER_IO: sv = (SV *)GvIO(gv); break;
166 case TYPE_FILTER_HASH: sv = (SV *)GvHV(gv); break;
167 case TYPE_FILTER_SCALAR: sv = (SV *)GvSV(gv); break;
168 default:
169 croak("Unknown type");
170 }
171 break;
172 default:
173 continue;
174 }
175
176 if (sv) {
177 const char *key = HePV(he, keylen);
178 if (!cb(key, keylen, sv, ud)) {
179 return;
180 }
181 }
182 }
183}
184
185static bool
186collect_all_symbols (const char *key, STRLEN keylen, SV *val, void *ud)
187{
188 HV *hash = (HV *)ud;
189
190 if (!hv_store (hash, key, keylen, newRV_inc(val), 0)) {
191 croak("failed to store symbol ref");
192 }
193
194 return TRUE;
195}
196
197HV *
e1f52a8a 198mop_get_all_package_symbols (HV *stash, type_filter_t filter)
d846ade3 199{
200 HV *ret = newHV ();
e1f52a8a 201 mop_get_package_symbols (stash, filter, collect_all_symbols, ret);
d846ade3 202 return ret;
203}
22932438 204
95ac09c5 205#define DECLARE_KEY(name) { #name, #name, NULL, 0 }
206#define DECLARE_KEY_WITH_VALUE(name, value) { #name, value, NULL, 0 }
207
22932438 208/* the order of these has to match with those in mop.h */
209static struct {
210 const char *name;
211 const char *value;
212 SV *key;
213 U32 hash;
214} prehashed_keys[key_last] = {
215 DECLARE_KEY(name),
216 DECLARE_KEY(package),
217 DECLARE_KEY(package_name),
218 DECLARE_KEY(body),
219 DECLARE_KEY_WITH_VALUE(package_cache_flag, "_package_cache_flag"),
220 DECLARE_KEY(methods),
221 DECLARE_KEY(VERSION),
222 DECLARE_KEY(ISA)
223};
224
20c230c5 225SV *
22932438 226mop_prehashed_key_for (mop_prehashed_key_t key)
227{
228 return prehashed_keys[key].key;
229}
230
20c230c5 231U32
22932438 232mop_prehashed_hash_for (mop_prehashed_key_t key)
233{
234 return prehashed_keys[key].hash;
235}
236
237void
238mop_prehash_keys ()
239{
240 int i;
22932438 241 for (i = 0; i < key_last; i++) {
242 const char *value = prehashed_keys[i].value;
243 prehashed_keys[i].key = newSVpv(value, strlen(value));
244 PERL_HASH(prehashed_keys[i].hash, value, strlen(value));
245 }
246}
7ec7b950 247
384bb6c9 248XS(mop_xs_simple_reader)
7ec7b950 249{
384bb6c9 250#ifdef dVAR
251 dVAR; dXSARGS;
252#else
253 dXSARGS;
254#endif
7ec7b950 255 register HE *he;
4f201502 256 mop_prehashed_key_t key = (mop_prehashed_key_t)CvXSUBANY(cv).any_i32;
384bb6c9 257 SV *self;
258
259 if (items != 1) {
260 croak("expected exactly one argument");
261 }
262
263 self = ST(0);
7ec7b950 264
265 if (!SvROK(self)) {
266 croak("can't call %s as a class method", prehashed_keys[key].name);
267 }
268
269 if (SvTYPE(SvRV(self)) != SVt_PVHV) {
270 croak("object is not a hashref");
271 }
272
38d91ddc 273 if ((he = hv_fetch_ent((HV *)SvRV(self), prehashed_keys[key].key, 0, prehashed_keys[key].hash))) {
274 ST(0) = HeVAL(he);
7ec7b950 275 }
384bb6c9 276 else {
38d91ddc 277 ST(0) = &PL_sv_undef;
7ec7b950 278 }
279
7ec7b950 280 XSRETURN(1);
281}
282