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/* go-type-string.c -- hash and equality string functions.
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 "go-string.h"
#include "go-type.h"
/* A string hash function for a map. */
uintptr_t
__go_type_hash_string (const void *vkey,
uintptr_t key_size __attribute__ ((unused)))
{
uintptr_t ret;
const struct __go_string *key;
int len;
int i;
const unsigned char *p;
ret = 5381;
key = (const struct __go_string *) vkey;
len = key->__length;
for (i = 0, p = key->__data; i < len; i++, p++)
ret = ret * 33 + *p;
return ret;
}
/* A string equality function for a map. */
_Bool
__go_type_equal_string (const void *vk1, const void *vk2,
uintptr_t key_size __attribute__ ((unused)))
{
const struct __go_string *k1;
const struct __go_string *k2;
k1 = (const struct __go_string *) vk1;
k2 = (const struct __go_string *) vk2;
return (k1->__length == k2->__length
&& __builtin_memcmp (k1->__data, k2->__data, k1->__length) == 0);
}
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