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/* indexbyte.c -- implement bytes.IndexByte for Go.

   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 "array.h"

/* This is in C so that the compiler can optimize it appropriately.

   We deliberately don't split the stack in case it does call the

   library function, which shouldn't need much stack space.  */

int IndexByte (struct __go_open_array, char)

  asm ("libgo_bytes.bytes.IndexByte")

  __attribute__ ((no_split_stack));

int

IndexByte (struct __go_open_array s, char b)

{

  char *p;

  p = __builtin_memchr (s.__values, b, s.__count);

  if (p == NULL)

    return -1;

  return p - (char *) s.__values;

}

/* Comparison.  */

_Bool Equal (struct __go_open_array a, struct __go_open_array b)

  asm ("libgo_bytes.bytes.Equal")

  __attribute__ ((no_split_stack));

_Bool

Equal (struct __go_open_array a, struct __go_open_array b)

{

  if (a.__count != b.__count)

    return 0;

  return __builtin_memcmp (a.__values, b.__values, a.__count) == 0;

}