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 __go_map_type *, int64_t hint,
  14                       void *, void *)
  15   __asm__ (GOSYM_PREFIX "runtime.makemap");
  16
  17 extern void mapassign1 (const struct __go_map_type *, void *hmap,
  18                         const void *key, const void *val)
  19   __asm__ (GOSYM_PREFIX "runtime.mapassign1");
  20
  21 void *
  22 __go_construct_map (const struct __go_map_type *type,
  23                     uintptr_t count, uintptr_t entry_size,
  24                     uintptr_t val_offset, const void *ventries)
  25 {
  26   void *ret;
  27   const unsigned char *entries;
  28   uintptr_t i;
  29
  30   ret = makemap(type, (int64_t) count, NULL, NULL);
  31
  32   entries = (const unsigned char *) ventries;
  33   for (i = 0; i < count; ++i)
  34     {
  35       mapassign1 (type, ret, entries, entries + val_offset);
  36       entries += entry_size;
  37     }
  38
  39   return ret;
  40 }