xs/MOP.xs

   1 #include "mop.h"
   2
   3 static bool
   4 find_method (const char *key, STRLEN keylen, SV *val, void *ud)
   5 {
   6     bool *found_method = (bool *)ud;
   7     PERL_UNUSED_ARG(key);
   8     PERL_UNUSED_ARG(keylen);
   9     PERL_UNUSED_ARG(val);
  10     *found_method = TRUE;
  11     return FALSE;
  12 }
  13
  14 static bool
  15 check_version (SV *klass, SV *required_version)
  16 {
  17     bool ret = 0;
  18
  19     dSP;
  20     ENTER;
  21     SAVETMPS;
  22     PUSHMARK(SP);
  23     EXTEND(SP, 2);
  24     PUSHs(klass);
  25     PUSHs(required_version);
  26     PUTBACK;
  27
  28     call_method("VERSION", G_DISCARD|G_VOID|G_EVAL);
  29
  30     SPAGAIN;
  31
  32     if (!SvTRUE(ERRSV)) {
  33         ret = 1;
  34     }
  35
  36     PUTBACK;
  37     FREETMPS;
  38     LEAVE;
  39
  40     return ret;
  41 }
  42
  43 EXTERN_C XS(boot_Class__MOP__Mixin__HasAttributes);
  44 EXTERN_C XS(boot_Class__MOP__Mixin__HasMethods);
  45 EXTERN_C XS(boot_Class__MOP__Package);
  46 EXTERN_C XS(boot_Class__MOP__Mixin__AttributeCore);
  47 EXTERN_C XS(boot_Class__MOP__Method);
  48 EXTERN_C XS(boot_Class__MOP__Method__Inlined);
  49 EXTERN_C XS(boot_Class__MOP__Method__Generated);
  50 EXTERN_C XS(boot_Class__MOP__Class);
  51 EXTERN_C XS(boot_Class__MOP__Attribute);
  52 EXTERN_C XS(boot_Class__MOP__Instance);
  53
  54 MODULE = Class::MOP   PACKAGE = Class::MOP
  55
  56 PROTOTYPES: DISABLE
  57
  58 BOOT:
  59     mop_prehash_keys();
  60
  61     MOP_CALL_BOOT (boot_Class__MOP__Mixin__HasAttributes);
  62     MOP_CALL_BOOT (boot_Class__MOP__Mixin__HasMethods);
  63     MOP_CALL_BOOT (boot_Class__MOP__Package);
  64     MOP_CALL_BOOT (boot_Class__MOP__Mixin__AttributeCore);
  65     MOP_CALL_BOOT (boot_Class__MOP__Method);
  66     MOP_CALL_BOOT (boot_Class__MOP__Method__Inlined);
  67     MOP_CALL_BOOT (boot_Class__MOP__Method__Generated);
  68     MOP_CALL_BOOT (boot_Class__MOP__Class);
  69     MOP_CALL_BOOT (boot_Class__MOP__Attribute);
  70     MOP_CALL_BOOT (boot_Class__MOP__Instance);
  71
  72 # use prototype here to be compatible with get_code_info from Sub::Identify
  73 void
  74 get_code_info(coderef)
  75     SV *coderef
  76     PROTOTYPE: $
  77     PREINIT:
  78         char *pkg  = NULL;
  79         char *name = NULL;
  80     PPCODE:
  81         SvGETMAGIC(coderef);
  82         if (mop_get_code_info(coderef, &pkg, &name)) {
  83             EXTEND(SP, 2);
  84             mPUSHs(newSVpv(pkg, 0));
  85             mPUSHs(newSVpv(name, 0));
  86         }
  87
  88 void
  89 is_class_loaded(klass, options=NULL)
  90     SV *klass
  91     HV *options
  92     PREINIT:
  93         HV *stash;
  94         bool found_method = FALSE;
  95     PPCODE:
  96         SvGETMAGIC(klass);
  97         if (!(SvPOKp(klass) && SvCUR(klass))) { /* XXX: SvPOK does not work with magical scalars */
  98             XSRETURN_NO;
  99         }
 100
 101         stash = gv_stashsv(klass, 0);
 102         if (!stash) {
 103             XSRETURN_NO;
 104         }
 105
 106         if (options && hv_exists_ent(options, KEY_FOR(_version), HASH_FOR(_version))) {
 107             HE *required_version = hv_fetch_ent(options, KEY_FOR(_version), 0, HASH_FOR(_version));
 108             if (check_version (klass, HeVAL(required_version))) {
 109                 XSRETURN_YES;
 110             }
 111
 112             XSRETURN_NO;
 113         }
 114
 115         if (hv_exists_ent (stash, KEY_FOR(VERSION), HASH_FOR(VERSION))) {
 116             HE *version = hv_fetch_ent(stash, KEY_FOR(VERSION), 0, HASH_FOR(VERSION));
 117             SV *version_sv;
 118             if (version && HeVAL(version) && (version_sv = GvSV(HeVAL(version)))) {
 119                 if (SvROK(version_sv)) {
 120                     SV *version_sv_ref = SvRV(version_sv);
 121
 122                     if (SvOK(version_sv_ref)) {
 123                         XSRETURN_YES;
 124                     }
 125                 }
 126                 else if (SvOK(version_sv)) {
 127                     XSRETURN_YES;
 128                 }
 129             }
 130         }
 131
 132         if (hv_exists_ent (stash, KEY_FOR(ISA), HASH_FOR(ISA))) {
 133             HE *isa = hv_fetch_ent(stash, KEY_FOR(ISA), 0, HASH_FOR(ISA));
 134             if (isa && HeVAL(isa) && GvAV(HeVAL(isa)) && av_len(GvAV(HeVAL(isa))) != -1) {
 135                 XSRETURN_YES;
 136             }
 137         }
 138
 139         mop_get_package_symbols(stash, TYPE_FILTER_CODE, find_method, &found_method);
 140         if (found_method) {
 141             XSRETURN_YES;
 142         }
 143
 144         XSRETURN_NO;