diff options
Diffstat (limited to 'libc/include/bits/swab.h')
-rw-r--r-- | libc/include/bits/swab.h | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/libc/include/bits/swab.h b/libc/include/bits/swab.h new file mode 100644 index 000000000..63281b6e0 --- /dev/null +++ b/libc/include/bits/swab.h @@ -0,0 +1,53 @@ +/* + * Copyright (C) 2019 The Android Open Source Project + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#pragma once + +#include <stdint.h> +#include <sys/cdefs.h> +#include <sys/types.h> + +#if !defined(__BIONIC_SWAB_INLINE) +#define __BIONIC_SWAB_INLINE static __inline +#endif + +__BEGIN_DECLS + +__BIONIC_SWAB_INLINE void swab(const void* __void_src, void* __void_dst, ssize_t __byte_count) { + const uint8_t* __src = __BIONIC_CAST(static_cast, const uint8_t*, __void_src); + uint8_t* __dst = __BIONIC_CAST(static_cast, uint8_t*, __void_dst); + while (__byte_count > 1) { + uint8_t x = *__src++; + uint8_t y = *__src++; + *__dst++ = y; + *__dst++ = x; + __byte_count -= 2; + } +} + +__END_DECLS |