memset_pattern.c   [plain text]

/*
 * Copyright (c) 2013 Apple Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */

#include <platform/string.h>

#if !_PLATFORM_OPTIMIZED_MEMSET_PATTERN4

void
_platform_memset_pattern4(void *b, const void *pattern4, size_t len)
{
	char * start = (char *)b;
	char * p = (char *)b;
	while ((start + len) - p >= 4) {
		_platform_memmove(p, pattern4, 4);
		p += 4;
	}
	if ((start + len) - p != 0) {
		_platform_memmove(p, pattern4, (start + len) - p);
	}
}

#if VARIANT_STATIC
void
memset_pattern4(void *b, const void *pattern4, size_t len)
{
	return _platform_memset_pattern4(b, pattern4, len);
}
#endif

#endif


#if !_PLATFORM_OPTIMIZED_MEMSET_PATTERN8

void
_platform_memset_pattern8(void *b, const void *pattern8, size_t len)
{
	char * start = (char *)b;
	char * p = (char *)b;
	while ((start + len) - p >= 8) {
		_platform_memmove(p, pattern8, 8);
		p += 8;
	}
	if ((start + len) - p != 0) {
		_platform_memmove(p, pattern8, (start + len) - p);
	}
}

#if VARIANT_STATIC
void
memset_pattern8(void *b, const void *pattern8, size_t len)
{
	return _platform_memset_pattern8(b, pattern8, len);
}
#endif

#endif


#if !_PLATFORM_OPTIMIZED_MEMSET_PATTERN16

void
_platform_memset_pattern16(void *b, const void *pattern16, size_t len)
{
	char * start = (char *)b;
	char * p = (char *)b;
	while ((start + len) - p >= 16) {
		_platform_memmove(p, pattern16, 16);
		p += 16;
	}
	if ((start + len) - p != 0) {
		_platform_memmove(p, pattern16, (start + len) - p);
	}
}

#if VARIANT_STATIC
void
memset_pattern16(void *b, const void *pattern16, size_t len)
{
	return _platform_memset_pattern16(b, pattern16, len);
}
#endif

#endif