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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);
}