platform_bionic/libc/include/bits/swab.h
Dan Albert 2dbea434d1 Make swab(3) inline prior to API 28.
Test: make checkbuild
Bug: https://stackoverflow.com/q/54392471/632035
Change-Id: Iaeb55231ea2395d7e1e31be63034f5db19025060
2020-08-07 13:10:51 -07:00

53 lines
1.9 KiB
C

/*
* 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