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 #include "map.h"
  13
  14 struct __go_map *
  15 __go_construct_map (const struct __go_map_descriptor *descriptor,
  16                     uintptr_t count, uintptr_t entry_size,
  17                     uintptr_t val_offset, uintptr_t val_size,
  18                     const void *ventries)
  19 {
  20   struct __go_map *ret;
  21   const unsigned char *entries;
  22   uintptr_t i;
  23
  24   ret = __go_new_map (descriptor, count);
  25
  26   entries = (const unsigned char *) ventries;
  27   for (i = 0; i < count; ++i)
  28     {
  29       void *val = __go_map_index (ret, entries, 1);
  30       __builtin_memcpy (val, entries + val_offset, val_size);
  31       entries += entry_size;
  32     }
  33
  34   return ret;
  35 }