MOP.xs

   1
   2 #include "EXTERN.h"
   3 #include "perl.h"
   4 #include "XSUB.h"
   5
   6 #define NEED_sv_2pv_flags
   7 #define NEED_sv_2pv_nolen
   8 #include "ppport.h"
   9
  10 SV *key_name;
  11 U32 hash_name;
  12
  13 SV *key_package;
  14 U32 hash_package;
  15
  16 SV *key_package_name;
  17 U32 hash_package_name;
  18
  19 SV *key_body;
  20 U32 hash_body;
  21
  22 /*
  23 get_code_info:
  24   Pass in a coderef, returns:
  25   [ $pkg_name, $coderef_name ] ie:
  26   [ 'Foo::Bar', 'new' ]
  27 */
  28
  29 MODULE = Class::MOP   PACKAGE = Class::MOP
  30
  31 BOOT:
  32     key_name = newSVpvs("name");
  33     key_body = newSVpvs("body");
  34     key_package = newSVpvs("package");
  35     key_package_name = newSVpvs("package_name");
  36
  37     PERL_HASH(hash_name, "name", 4);
  38     PERL_HASH(hash_body, "body", 4);
  39     PERL_HASH(hash_package, "package", 7);
  40     PERL_HASH(hash_package_name, "package_name", 12);
  41
  42
  43 PROTOTYPES: ENABLE
  44
  45
  46 void
  47 get_code_info(coderef)
  48   SV* coderef
  49   PREINIT:
  50     char* name;
  51     char* pkg;
  52   PPCODE:
  53     if( SvOK(coderef) && SvROK(coderef) && SvTYPE(SvRV(coderef)) == SVt_PVCV){
  54       coderef = SvRV(coderef);
  55       /* I think this only gets triggered with a mangled coderef, but if
  56          we hit it without the guard, we segfault. The slightly odd return
  57          value strikes me as an improvement (mst)
  58       */
  59 #ifdef isGV_with_GP
  60       if ( isGV_with_GP(CvGV(coderef))) {
  61 #endif
  62         pkg     = HvNAME( GvSTASH(CvGV(coderef)) );
  63         name    = GvNAME( CvGV(coderef) );
  64 #ifdef isGV_with_GP
  65       } else {
  66         pkg     = "__UNKNOWN__";
  67         name    = "__ANON__";
  68       }
  69 #endif
  70
  71       EXTEND(SP, 2);
  72       PUSHs(newSVpvn(pkg, strlen(pkg)));
  73       PUSHs(newSVpvn(name, strlen(name)));
  74     }
  75
  76
  77 MODULE = Class::MOP   PACKAGE = Class::MOP::Package
  78
  79 void
  80 get_all_package_symbols(self, ...)
  81     SV *self
  82     PROTOTYPE: $;$
  83     PREINIT:
  84         HV *stash = NULL;
  85         SV *type_filter = NULL;
  86         register HE *he;
  87     PPCODE:
  88         if (! SvROK(self)) {
  89             die("Cannot call get_all_package_symbols as a class method");
  90         }
  91
  92         switch ( GIMME_V ) {
  93             case G_VOID: return; break;
  94             case G_SCALAR: ST(0) = &PL_sv_undef; return; break;
  95         }
  96
  97         if ( items > 1 ) type_filter = ST(1);
  98
  99         PUTBACK;
 100
 101         if ((he = hv_fetch_ent((HV *)SvRV(self), key_package, 0, hash_package)))
 102             stash = gv_stashsv(HeVAL(he),0);
 103
 104         if ( stash ) {
 105
 106             (void)hv_iterinit(stash);
 107
 108             if ( type_filter && SvPOK(type_filter) ) {
 109                 const char *const type = SvPV_nolen(type_filter);
 110
 111                 while ((he = hv_iternext(stash))) {
 112                     SV *const gv = HeVAL(he);
 113                     SV *sv;
 114                     char *key;
 115                     STRLEN keylen;
 116                     char *package;
 117                     SV *fq;
 118
 119                     switch( SvTYPE(gv) ) {
 120                         case SVt_PVGV:
 121                             switch (*type) {
 122                                 case 'C': sv = (SV *)GvCVu(gv); break; /* CODE */
 123                                 case 'A': sv = (SV *)GvAV(gv); break; /* ARRAY */
 124                                 case 'I': sv = (SV *)GvIO(gv); break; /* IO */
 125                                 case 'H': sv = (SV *)GvHV(gv); break; /* HASH */
 126                                 case 'S': sv = (SV *)GvSV(gv); break; /* SCALAR */
 127                                 default:
 128                                           croak("Unknown type %s\n", type);
 129                             }
 130                             break;
 131                         case SVt_RV:
 132                             /* BAH! constants are horrible */
 133
 134                             if (!SvROK (gv)) {
 135                                 continue;
 136                             }
 137
 138                             /* we don't really care about the length,
 139                                but that's the API */
 140                             key = HePV(he, keylen);
 141                             package = HvNAME(stash);
 142                             fq = newSVpvf("%s::%s", package, key);
 143                             sv = (SV*)get_cv(SvPV_nolen(fq), 0);
 144                             break;
 145                         default:
 146                             continue;
 147                     }
 148
 149                     if ( sv ) {
 150                         SV *key = hv_iterkeysv(he);
 151                         SPAGAIN;
 152                         EXTEND(SP, 2);
 153                         PUSHs(key);
 154                         PUSHs(sv_2mortal(newRV_inc(sv)));
 155                         PUTBACK;
 156                     }
 157                 }
 158             } else {
 159                 EXTEND(SP, HvKEYS(stash) * 2);
 160
 161                 while ((he = hv_iternext(stash))) {
 162                     SV *key = hv_iterkeysv(he);
 163                     SV *sv = HeVAL(he);
 164                     SPAGAIN;
 165                     PUSHs(key);
 166                     PUSHs(sv);
 167                     PUTBACK;
 168                 }
 169             }
 170
 171         }
 172
 173 void
 174 name(self)
 175     SV *self
 176     PREINIT:
 177         register HE *he;
 178     PPCODE:
 179         if (! SvROK(self)) {
 180             die("Cannot call name as a class method");
 181         }
 182
 183         if ((he = hv_fetch_ent((HV *)SvRV(self), key_package, 0, hash_package)))
 184             XPUSHs(HeVAL(he));
 185         else
 186             ST(0) = &PL_sv_undef;
 187
 188 MODULE = Class::MOP   PACKAGE = Class::MOP::Attribute
 189
 190 void
 191 name(self)
 192     SV *self
 193     PREINIT:
 194         register HE *he;
 195     PPCODE:
 196         if (! SvROK(self)) {
 197             die("Cannot call name as a class method");
 198         }
 199
 200         if ((he = hv_fetch_ent((HV *)SvRV(self), key_name, 0, hash_name)))
 201             XPUSHs(HeVAL(he));
 202         else
 203             ST(0) = &PL_sv_undef;
 204
 205 MODULE = Class::MOP   PACKAGE = Class::MOP::Method
 206
 207 void
 208 name(self)
 209     SV *self
 210     PREINIT:
 211         register HE *he;
 212     PPCODE:
 213         if (! SvROK(self)) {
 214             die("Cannot call name as a class method");
 215         }
 216
 217         if ((he = hv_fetch_ent((HV *)SvRV(self), key_name, 0, hash_name)))
 218             XPUSHs(HeVAL(he));
 219         else
 220             ST(0) = &PL_sv_undef;
 221
 222 void
 223 package_name(self)
 224     SV *self
 225     PREINIT:
 226         register HE *he;
 227     PPCODE:
 228         if (! SvROK(self)) {
 229             die("Cannot call package_name as a class method");
 230         }
 231
 232         if ((he = hv_fetch_ent((HV *)SvRV(self), key_package_name, 0, hash_package_name)))
 233             XPUSHs(HeVAL(he));
 234         else
 235             ST(0) = &PL_sv_undef;
 236
 237 void
 238 body(self)
 239     SV *self
 240     PREINIT:
 241         register HE *he;
 242     PPCODE:
 243         if (! SvROK(self)) {
 244             die("Cannot call body as a class method");
 245         }
 246
 247         if ((he = hv_fetch_ent((HV *)SvRV(self), key_body, 0, hash_body)))
 248             XPUSHs(HeVAL(he));
 249         else
 250             ST(0) = &PL_sv_undef;