| Peter Collingbourne | 594c10d | 2014-11-27 00:12:26 +0000 | [diff] [blame] | 1 | /* go-map-len.c -- return the length of a map. |
| 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 | |
| 9 | #include "runtime.h" |
| 10 | #include "go-assert.h" |
| 11 | #include "map.h" |
| 12 | |
| 13 | /* Return the length of a map. This could be done inline, of course, |
| 14 | but I'm doing it as a function for now to make it easy to change |
| 15 | the map structure. */ |
| 16 | |
| 17 | intgo |
| 18 | __go_map_len (struct __go_map *map) |
| 19 | { |
| 20 | if (map == NULL) |
| 21 | return 0; |
| 22 | __go_assert (map->__element_count |
| 23 | == (uintptr_t) (intgo) map->__element_count); |
| 24 | return map->__element_count; |
| 25 | } |