/* 
 * Copyright 2010 Stefan Lankes, Chair for Operating Systems,
 *                               RWTH Aachen University
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 *  This file is part of MetalSVM.
 */

#include <metalsvm/string.h>

#ifndef HAVE_ARCH_MEMCPY
void *memcpy(void *dest, const void *src, size_t count)
{
	size_t i;

	if (BUILTIN_EXPECT(!dest || !src, 0))
		return dest;

	for (i = 0; i < count; i++)
		((char*)dest)[i] = ((char*)src)[i];
	
	return dest;
}
#endif

#ifndef HAVE_ARCH_MEMSET
void *memset(void *dest, int val, size_t count)
{
	size_t i;

	if (BUILTIN_EXPECT(!dest, 0))
		return dest;

	for (i = 0; i < count; i++)
		((char*) dest)[i] = (char) val;

	return dest;
}
#endif

#ifndef HAVE_ARCH_STRLEN
size_t strlen(const char *str)
{
	size_t len = 0;

	if (BUILTIN_EXPECT(!str, 0))
		return len;

	while (str[len] != '\0')
		len++;

	return len;
}
#endif

#ifndef HAVE_ARCH_STRNCPY
char* strncpy(char *dest, const char *src, size_t n)
{
	size_t i;

	if (BUILTIN_EXPECT(!dest || !src, 0))
		return dest;

	for (i = 0 ; i < n && src[i] != '\0' ; i++)
		dest[i] = src[i];
	if (i < n)
		dest[i] = '\0';
	else
		dest[n-1] = '\0';

	return dest;
}
#endif

#ifndef HAVE_ARCH_STRCPY
char* strcpy(char *dest, const char *src)
{
        size_t i;

	if (BUILTIN_EXPECT(!dest || !src, 0))
		return dest;

        for (i = 0 ; src[i] != '\0' ; i++)
                dest[i] = src[i];
        dest[i] = '\0';

        return dest;
}
#endif