when checking @ISA to see if a class is loaded, make sure it actually has values...
[gitmo/Class-MOP.git] / xs / MOP.xs
1 #include "mop.h"
2
3 SV *mop_method_metaclass;
4 SV *mop_associated_metaclass;
5 SV *mop_wrap;
6
7 static bool
8 find_method (const char *key, STRLEN keylen, SV *val, void *ud)
9 {
10     bool *found_method = (bool *)ud;
11     PERL_UNUSED_ARG(key);
12     PERL_UNUSED_ARG(keylen);
13     PERL_UNUSED_ARG(val);
14     *found_method = TRUE;
15     return FALSE;
16 }
17
18 EXTERN_C XS(boot_Class__MOP__Package);
19 EXTERN_C XS(boot_Class__MOP__Class);
20 EXTERN_C XS(boot_Class__MOP__Attribute);
21 EXTERN_C XS(boot_Class__MOP__Method);
22
23 MODULE = Class::MOP   PACKAGE = Class::MOP
24
25 PROTOTYPES: DISABLE
26
27 BOOT:
28     mop_prehash_keys();
29
30     mop_method_metaclass     = newSVpvs("method_metaclass");
31     mop_wrap                 = newSVpvs("wrap");
32     mop_associated_metaclass = newSVpvs("associated_metaclass");
33
34     MOP_CALL_BOOT (boot_Class__MOP__Package);
35     MOP_CALL_BOOT (boot_Class__MOP__Class);
36     MOP_CALL_BOOT (boot_Class__MOP__Attribute);
37     MOP_CALL_BOOT (boot_Class__MOP__Method);
38
39 # use prototype here to be compatible with get_code_info from Sub::Identify
40 void
41 get_code_info(coderef)
42     SV *coderef
43     PROTOTYPE: $
44     PREINIT:
45         char *pkg  = NULL;
46         char *name = NULL;
47     PPCODE:
48         if (mop_get_code_info(coderef, &pkg, &name)) {
49             EXTEND(SP, 2);
50             PUSHs(newSVpv(pkg, 0));
51             PUSHs(newSVpv(name, 0));
52         }
53
54 # This is some pretty grotty logic. It _should_ be parallel to the
55 # pure Perl version in lib/Class/MOP.pm, so if you want to understand
56 # it we suggest you start there.
57 void
58 is_class_loaded(klass=&PL_sv_undef)
59     SV *klass
60     PREINIT:
61         HV *stash;
62         bool found_method = FALSE;
63     PPCODE:
64         if (!SvPOK(klass) || !SvCUR(klass)) {
65             XSRETURN_NO;
66         }
67
68         stash = gv_stashsv(klass, 0);
69         if (!stash) {
70             XSRETURN_NO;
71         }
72
73         if (hv_exists_ent (stash, KEY_FOR(VERSION), HASH_FOR(VERSION))) {
74             HE *version = hv_fetch_ent(stash, KEY_FOR(VERSION), 0, HASH_FOR(VERSION));
75             SV *version_sv;
76             if (version && HeVAL(version) && (version_sv = GvSV(HeVAL(version)))) {
77                 if (SvROK(version_sv)) {
78                     SV *version_sv_ref = SvRV(version_sv);
79
80                     if (SvOK(version_sv_ref)) {
81                         XSRETURN_YES;
82                     }
83                 }
84                 else if (SvOK(version_sv)) {
85                     XSRETURN_YES;
86                 }
87             }
88         }
89
90         if (hv_exists_ent (stash, KEY_FOR(ISA), HASH_FOR(ISA))) {
91             HE *isa = hv_fetch_ent(stash, KEY_FOR(ISA), 0, HASH_FOR(ISA));
92             if (isa && HeVAL(isa) && GvAV(HeVAL(isa)) && av_len(GvAV(HeVAL(isa))) != -1) {
93                 XSRETURN_YES;
94             }
95         }
96
97         mop_get_package_symbols(stash, TYPE_FILTER_CODE, find_method, &found_method);
98         if (found_method) {
99             XSRETURN_YES;
100         }
101
102         XSRETURN_NO;