46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
/* go-type-string.c -- hash and equality string functions.
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Copyright 2009 The Go Authors. All rights reserved.
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Use of this source code is governed by a BSD-style
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license that can be found in the LICENSE file. */
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#include <stddef.h>
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#include "go-string.h"
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#include "go-type.h"
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/* A string hash function for a map. */
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uintptr_t
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__go_type_hash_string (const void *vkey,
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uintptr_t key_size __attribute__ ((unused)))
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{
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uintptr_t ret;
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const struct __go_string *key;
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int len;
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int i;
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const unsigned char *p;
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ret = 5381;
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key = (const struct __go_string *) vkey;
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len = key->__length;
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for (i = 0, p = key->__data; i < len; i++, p++)
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ret = ret * 33 + *p;
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return ret;
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}
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/* A string equality function for a map. */
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_Bool
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__go_type_equal_string (const void *vk1, const void *vk2,
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uintptr_t key_size __attribute__ ((unused)))
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{
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const struct __go_string *k1;
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const struct __go_string *k2;
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k1 = (const struct __go_string *) vk1;
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k2 = (const struct __go_string *) vk2;
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return (k1->__length == k2->__length
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&& __builtin_memcmp (k1->__data, k2->__data, k1->__length) == 0);
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}
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