libgo/runtime/go-construct-map.c

   1 /* go-construct-map.c -- construct a map from an initializer.
   2
   3    Copyright 2009 The Go Authors. All rights reserved.
   4    Use of this source code is governed by a BSD-style
   5    license that can be found in the LICENSE file.  */
   6
   7 #include <stddef.h>
   8 #include <stdint.h>
   9 #include <stdlib.h>
  10
  11 #include "runtime.h"
  12
  13 extern void *makemap (const struct maptype *, intgo hint, void *)
  14   __asm__ (GOSYM_PREFIX "runtime.makemap");
  15
  16 extern void *mapassign (const struct maptype *, void *hmap, const void *key)
  17   __asm__ (GOSYM_PREFIX "runtime.mapassign");
  18
  19 void *
  20 __go_construct_map (const struct maptype *type, uintptr_t count,
  21                     uintptr_t entry_size, uintptr_t val_offset,
  22                     const void *ventries)
  23 {
  24   void *ret;
  25   const unsigned char *entries;
  26   uintptr_t i;
  27   void *p;
  28
  29   ret = makemap(type, (intgo) count, NULL);
  30
  31   entries = (const unsigned char *) ventries;
  32   for (i = 0; i < count; ++i)
  33     {
  34       p = mapassign (type, ret, entries);
  35       typedmemmove (type->elem, p, entries + val_offset);
  36       entries += entry_size;
  37     }
  38
  39   return ret;
  40 }