builtin.c

   1 #include "internal.h"
   2 #include "vm_core.h"
   3 #include "iseq.h"
   4 #include "builtin.h"
   5
   6 #include "builtin_binary.inc"
   7
   8 #ifndef BUILTIN_BINARY_SIZE
   9
  10 #define BUILTIN_LOADED(feature_name, iseq) ((void)0)
  11 #include "mini_builtin.c"
  12
  13 #else
  14
  15 static const unsigned char *
  16 bin4feature(const struct builtin_binary *bb, const char *feature, size_t *psize)
  17 {
  18     *psize = bb->bin_size;
  19     return strcmp(bb->feature, feature) ? NULL : bb->bin;
  20 }
  21
  22 static const unsigned char*
  23 builtin_lookup(const char *feature, size_t *psize)
  24 {
  25     static int index = 0;
  26     const unsigned char *bin = bin4feature(&builtin_binary[index++], feature, psize);
  27
  28     // usually, `builtin_binary` order is loading order at miniruby.
  29     for (const struct builtin_binary *bb = &builtin_binary[0]; bb->feature &&! bin; bb++) {
  30         bin = bin4feature(bb++, feature, psize);
  31     }
  32     return bin;
  33 }
  34
  35 void
  36 rb_load_with_builtin_functions(const char *feature_name, const struct rb_builtin_function *table)
  37 {
  38     // search binary
  39     size_t size;
  40     const unsigned char *bin = builtin_lookup(feature_name, &size);
  41     if (! bin) {
  42         rb_bug("builtin_lookup: can not find %s", feature_name);
  43     }
  44
  45     // load binary
  46     rb_vm_t *vm = GET_VM();
  47     if (vm->builtin_function_table != NULL) rb_bug("vm->builtin_function_table should be NULL.");
  48     vm->builtin_function_table = table;
  49     const rb_iseq_t *iseq = rb_iseq_ibf_load_bytes((const char *)bin, size);
  50     ASSUME(iseq); // otherwise an exception should have raised
  51     vm->builtin_function_table = NULL;
  52
  53     // exec
  54     rb_iseq_eval(rb_iseq_check(iseq));
  55 }
  56
  57 #endif
  58
  59 void
  60 rb_free_loaded_builtin_table(void)
  61 {
  62     // do nothing
  63 }
  64
  65 void
  66 Init_builtin(void)
  67 {
  68     // nothing
  69 }
  70
  71 void
  72 Init_builtin_features(void)
  73 {
  74     rb_load_with_builtin_functions("gem_prelude", NULL);
  75 }