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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);

}