MOP.xs

   1
   2 #include "EXTERN.h"
   3 #include "perl.h"
   4 #include "XSUB.h"
   5
   6 #define NEED_sv_2pv_nolen
   7 #include "ppport.h"
   8
   9 SV *key_name;
  10 U32 hash_name;
  11
  12 SV *key_package;
  13 U32 hash_package;
  14
  15 SV *key_body;
  16 U32 hash_body;
  17
  18 /*
  19 get_code_info:
  20   Pass in a coderef, returns:
  21   [ $pkg_name, $coderef_name ] ie:
  22   [ 'Foo::Bar', 'new' ]
  23 */
  24
  25 MODULE = Class::MOP   PACKAGE = Class::MOP
  26
  27 BOOT:
  28     key_name = newSVpvs("name");
  29     key_body = newSVpvs("body");
  30     key_package = newSVpvs("package");
  31
  32     PERL_HASH(hash_name, "name", 4);
  33     PERL_HASH(hash_body, "body", 4);
  34     PERL_HASH(hash_package, "package", 7);
  35
  36
  37 PROTOTYPES: ENABLE
  38
  39
  40 void
  41 get_code_info(coderef)
  42   SV* coderef
  43   PREINIT:
  44     char* name;
  45     char* pkg;
  46   PPCODE:
  47     if( SvOK(coderef) && SvROK(coderef) && SvTYPE(SvRV(coderef)) == SVt_PVCV){
  48       coderef = SvRV(coderef);
  49       /* I think this only gets triggered with a mangled coderef, but if
  50          we hit it without the guard, we segfault. The slightly odd return
  51          value strikes me as an improvement (mst)
  52       */
  53 #ifdef isGV_with_GP
  54       if ( isGV_with_GP(CvGV(coderef))) {
  55 #endif
  56         pkg     = HvNAME( GvSTASH(CvGV(coderef)) );
  57         name    = GvNAME( CvGV(coderef) );
  58 #ifdef isGV_with_GP
  59       } else {
  60         pkg     = "__UNKNOWN__";
  61         name    = "__ANON__";
  62       }
  63 #endif
  64
  65       EXTEND(SP, 2);
  66       PUSHs(newSVpvn(pkg, strlen(pkg)));
  67       PUSHs(newSVpvn(name, strlen(name)));
  68     }
  69
  70
  71 MODULE = Class::MOP   PACKAGE = Class::MOP::Package
  72
  73 void
  74 get_all_package_symbols(self, ...)
  75     SV *self
  76     PROTOTYPE: $;$
  77     PREINIT:
  78         HV *stash = NULL;
  79         SV *type_filter = NULL;
  80     PPCODE:
  81
  82         switch ( GIMME_V ) {
  83             case G_VOID: return; break;
  84             case G_SCALAR: ST(0) = &PL_sv_undef; return; break;
  85         }
  86
  87         if ( items > 1 ) type_filter = ST(1);
  88
  89         PUTBACK;
  90
  91         if ( SvROK(self) ) {
  92             SV **val = hv_fetchs((HV *)SvRV(self), "package", 0);
  93             if ( val ) {
  94                 stash = gv_stashsv(*val, 0);
  95             }
  96         }
  97
  98         if ( stash ) {
  99             register HE *entry;
 100
 101             (void)hv_iterinit(stash);
 102
 103             if ( type_filter && SvPOK(type_filter) ) {
 104                 const char *const type = SvPV_nolen(type_filter);
 105
 106
 107                 while ((entry = hv_iternext(stash))) {
 108                     SV *const gv = hv_iterval(stash, entry);
 109                     SV *const key = hv_iterkeysv(entry);
 110                     SV *sv;
 111                     char *package = HvNAME(stash);
 112                     STRLEN pkglen = strlen(package);
 113                     char *fq;
 114                     STRLEN fqlen;
 115
 116                     SPAGAIN;
 117
 118                     switch( SvTYPE(gv) ) {
 119                         case SVt_PVGV:
 120                             switch (*type) {
 121                                 case 'C': sv = (SV *)GvCVu(gv); break; /* CODE */
 122                                 case 'A': sv = (SV *)GvAV(gv); break; /* ARRAY */
 123                                 case 'I': sv = (SV *)GvIO(gv); break; /* IO */
 124                                 case 'H': sv = (SV *)GvHV(gv); break; /* HASH */
 125                                 case 'S': sv = (SV *)GvSV(gv); break; /* SCALAR */
 126                                 default:
 127                                           croak("Unknown type %s\n", type);
 128                             }
 129                             break;
 130                         case SVt_RV:
 131                             /* BAH! constants are horrible */
 132                             fqlen = pkglen + SvCUR(key) + 3;
 133                             fq = (char *)alloca(fqlen);
 134                             snprintf(fq, fqlen, "%s::%s", package, SvPV_nolen(key));
 135                             sv = (SV*)get_cv(fq, 0);
 136                             break;
 137                         default:
 138                             continue;
 139                     }
 140
 141                     if ( sv ) {
 142                         SPAGAIN;
 143                         EXTEND(SP, 2);
 144                         PUSHs(key);
 145                         PUSHs(sv_2mortal(newRV_inc(sv)));
 146                         PUTBACK;
 147                     }
 148                 }
 149             } else {
 150                 EXTEND(SP, HvKEYS(stash) * 2);
 151
 152                 while ((entry = hv_iternext(stash))) {
 153                     SV *key = hv_iterkeysv(entry);
 154                     SV *sv = hv_iterval(stash, entry);
 155                     SPAGAIN;
 156                     PUSHs(key);
 157                     PUSHs(sv);
 158                     PUTBACK;
 159                 }
 160             }
 161
 162         }
 163
 164 SV *
 165 name(self)
 166     SV *self
 167     PREINIT:
 168         register HE *he;
 169     PPCODE:
 170         if (SvROK(self) && (he = hv_fetch_ent((HV *)SvRV(self), key_package, 0, hash_package)))
 171             XPUSHs(HeVAL(he));
 172         else
 173             ST(0) = &PL_sv_undef;
 174
 175 MODULE = Class::MOP   PACKAGE = Class::Attribute
 176
 177 SV *
 178 name(self)
 179     SV *self
 180     PREINIT:
 181         register HE *he;
 182     PPCODE:
 183         if (SvROK(self) && (he = hv_fetch_ent((HV *)SvRV(self), key_name, 0, hash_name)))
 184             XPUSHs(HeVAL(he));
 185         else
 186             ST(0) = &PL_sv_undef;
 187
 188 MODULE = Class::MOP   PACKAGE = Class::Method
 189
 190 SV *
 191 name(self)
 192     SV *self
 193     PREINIT:
 194         register HE *he;
 195     PPCODE:
 196         if (SvROK(self) && (he = hv_fetch_ent((HV *)SvRV(self), key_name, 0, hash_name)))
 197             XPUSHs(HeVAL(he));
 198         else
 199             ST(0) = &PL_sv_undef;
 200
 201 SV *
 202 body(self)
 203     SV *self
 204     PREINIT:
 205         register HE *he;
 206     PPCODE:
 207         if (SvROK(self) && (he = hv_fetch_ent((HV *)SvRV(self), key_body, 0, hash_body)))
 208             XPUSHs(HeVAL(he));
 209         else
 210             ST(0) = &PL_sv_undef;