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__HasMethods);
  44 EXTERN_C XS(boot_Class__MOP__Package);
  45 EXTERN_C XS(boot_Class__MOP__Mixin__AttributeCore);
  46 EXTERN_C XS(boot_Class__MOP__Method);
  47
  48 MODULE = Class::MOP   PACKAGE = Class::MOP
  49
  50 PROTOTYPES: DISABLE
  51
  52 BOOT:
  53     mop_prehash_keys();
  54
  55     MOP_CALL_BOOT (boot_Class__MOP__Mixin__HasMethods);
  56     MOP_CALL_BOOT (boot_Class__MOP__Package);
  57     MOP_CALL_BOOT (boot_Class__MOP__Mixin__AttributeCore);
  58     MOP_CALL_BOOT (boot_Class__MOP__Method);
  59
  60 # use prototype here to be compatible with get_code_info from Sub::Identify
  61 void
  62 get_code_info(coderef)
  63     SV *coderef
  64     PROTOTYPE: $
  65     PREINIT:
  66         char *pkg  = NULL;
  67         char *name = NULL;
  68     PPCODE:
  69         SvGETMAGIC(coderef);
  70         if (mop_get_code_info(coderef, &pkg, &name)) {
  71             EXTEND(SP, 2);
  72             mPUSHs(newSVpv(pkg, 0));
  73             mPUSHs(newSVpv(name, 0));
  74         }
  75
  76 void
  77 is_class_loaded(klass, options=NULL)
  78     SV *klass
  79     HV *options
  80     PREINIT:
  81         HV *stash;
  82         bool found_method = FALSE;
  83     PPCODE:
  84         SvGETMAGIC(klass);
  85         if (!(SvPOKp(klass) && SvCUR(klass))) { /* XXX: SvPOK does not work with magical scalars */
  86             XSRETURN_NO;
  87         }
  88
  89         stash = gv_stashsv(klass, 0);
  90         if (!stash) {
  91             XSRETURN_NO;
  92         }
  93
  94         if (options && hv_exists_ent(options, KEY_FOR(_version), HASH_FOR(_version))) {
  95             HE *required_version = hv_fetch_ent(options, KEY_FOR(_version), 0, HASH_FOR(_version));
  96             if (check_version (klass, HeVAL(required_version))) {
  97                 XSRETURN_YES;
  98             }
  99
 100             XSRETURN_NO;
 101         }
 102
 103         if (hv_exists_ent (stash, KEY_FOR(VERSION), HASH_FOR(VERSION))) {
 104             HE *version = hv_fetch_ent(stash, KEY_FOR(VERSION), 0, HASH_FOR(VERSION));
 105             SV *version_sv;
 106             if (version && HeVAL(version) && (version_sv = GvSV(HeVAL(version)))) {
 107                 if (SvROK(version_sv)) {
 108                     SV *version_sv_ref = SvRV(version_sv);
 109
 110                     if (SvOK(version_sv_ref)) {
 111                         XSRETURN_YES;
 112                     }
 113                 }
 114                 else if (SvOK(version_sv)) {
 115                     XSRETURN_YES;
 116                 }
 117             }
 118         }
 119
 120         if (hv_exists_ent (stash, KEY_FOR(ISA), HASH_FOR(ISA))) {
 121             HE *isa = hv_fetch_ent(stash, KEY_FOR(ISA), 0, HASH_FOR(ISA));
 122             if (isa && HeVAL(isa) && GvAV(HeVAL(isa)) && av_len(GvAV(HeVAL(isa))) != -1) {
 123                 XSRETURN_YES;
 124             }
 125         }
 126
 127         mop_get_package_symbols(stash, TYPE_FILTER_CODE, find_method, &found_method);
 128         if (found_method) {
 129             XSRETURN_YES;
 130         }
 131
 132         XSRETURN_NO;