Merge "Remove unused big-endian cruft." am: c21c0ac7 am: 768a8df3 am: 82e15285

 * 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>

#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.

 */

static inline uint32_t android_swap_long(uint32_t v)

{

    return (v<<24) | ((v<<8)&0x00FF0000) | ((v>>8)&0x0000FF00) | (v>>24);

}

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

/* TODO: move this cruft to frameworks/. */

#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