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Remove unused big-endian cruft.

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Test: builds
Change-Id: I19fef65d311923e4e6dac7307914f5fbb92b7bde
This commit is contained in:
Elliott Hughes 2019-09-18 08:02:10 -07:00
parent f3a5ab8b1d
commit b6e7de2221
1 changed files with 15 additions and 51 deletions
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66
libutils/include/utils/ByteOrder.h
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@ -14,10 +14,17 @@
* limitations under the License.
*/
//
#pragma once
#ifndef _LIBS_UTILS_BYTE_ORDER_H
#define _LIBS_UTILS_BYTE_ORDER_H
/*
* If you're looking for a portable <endian.h> that's available on Android,
* Linux, macOS, and Windows, see <android-base/endian.h> instead.
*
* Nothing in this file is useful because all supported Android ABIs are
* little-endian and all our code that runs on the host assumes that the host is
* also little-endian. What pretense at big-endian support exists is completely
* untested and unlikely to actually work.
*/
#include <stdint.h>
#include <sys/types.h>
@ -27,55 +34,12 @@
#include <netinet/in.h>
#endif
/*
* These macros are like the hton/ntoh byte swapping macros,
* except they allow you to swap to and from the "device" byte
* order. The device byte order is the endianness of the target
* device -- for the ARM CPUs we use today, this is little endian.
*
* Note that the byte swapping functions have not been optimized
* much; performance is currently not an issue for them since the
* intent is to allow us to avoid byte swapping on the device.
*/
/* TODO: move this cruft to frameworks/. */
static inline uint32_t android_swap_long(uint32_t v)
{
return (v<<24) | ((v<<8)&0x00FF0000) | ((v>>8)&0x0000FF00) | (v>>24);
}
#define dtohl(x) (x)
#define dtohs(x) (x)
#define htodl(x) (x)
#define htods(x) (x)
static inline uint16_t android_swap_short(uint16_t v)
{
return (v<<8) | (v>>8);
}
#define DEVICE_BYTE_ORDER LITTLE_ENDIAN
#if BYTE_ORDER == DEVICE_BYTE_ORDER
#define dtohl(x) (x)
#define dtohs(x) (x)
#define htodl(x) (x)
#define htods(x) (x)
#else
#define dtohl(x) (android_swap_long(x))
#define dtohs(x) (android_swap_short(x))
#define htodl(x) (android_swap_long(x))
#define htods(x) (android_swap_short(x))
#endif
#if BYTE_ORDER == LITTLE_ENDIAN
#define fromlel(x) (x)
#define fromles(x) (x)
#define tolel(x) (x)
#define toles(x) (x)
#else
#define fromlel(x) (android_swap_long(x))
#define fromles(x) (android_swap_short(x))
#define tolel(x) (android_swap_long(x))
#define toles(x) (android_swap_short(x))
#endif
#endif // _LIBS_UTILS_BYTE_ORDER_H