File: go-map-len.c

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/* go-map-len.c -- return the length of a map.

   Copyright 2009 The Go Authors. All rights reserved.
   Use of this source code is governed by a BSD-style
   license that can be found in the LICENSE file.  */

#include <stddef.h>

#include "runtime.h"
#include "go-assert.h"
#include "map.h"

/* Return the length of a map.  This could be done inline, of course,
   but I'm doing it as a function for now to make it easy to change
   the map structure.  */

intgo
__go_map_len (struct __go_map *map)
{
  if (map == NULL)
    return 0;
  __go_assert (map->__element_count
	       == (uintptr_t) (intgo) map->__element_count);
  return map->__element_count;
}