mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-09-12 07:01:10 +03:00
796a9d1091
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@15242 3c298f89-4303-0410-b956-a3cf2f4a3e73
198 lines
4.4 KiB
C
198 lines
4.4 KiB
C
/*
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* local version of endian.h - byte order defines
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*
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* Copyright 2007, Broadcom Corporation
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* All Rights Reserved.
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*
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* THIS SOFTWARE IS OFFERED "AS IS", AND BROADCOM GRANTS NO WARRANTIES OF ANY
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* KIND, EXPRESS OR IMPLIED, BY STATUTE, COMMUNICATION OR OTHERWISE. BROADCOM
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* SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A SPECIFIC PURPOSE OR NONINFRINGEMENT CONCERNING THIS SOFTWARE.
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*
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*/
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#ifndef _BCMENDIAN_H_
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#define _BCMENDIAN_H_
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#include <typedefs.h>
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/* Byte swap a 16 bit value */
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#define BCMSWAP16(val) \
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((uint16)(\
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(((uint16)(val) & (uint16)0x00ffU) << 8) | \
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(((uint16)(val) & (uint16)0xff00U) >> 8)))
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/* Byte swap a 32 bit value */
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#define BCMSWAP32(val) \
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((uint32)(\
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(((uint32)(val) & (uint32)0x000000ffUL) << 24) | \
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(((uint32)(val) & (uint32)0x0000ff00UL) << 8) | \
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(((uint32)(val) & (uint32)0x00ff0000UL) >> 8) | \
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(((uint32)(val) & (uint32)0xff000000UL) >> 24)))
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/* 2 Byte swap a 32 bit value */
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#define BCMSWAP32BY16(val) \
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((uint32)(\
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(((uint32)(val) & (uint32)0x0000ffffUL) << 16) | \
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(((uint32)(val) & (uint32)0xffff0000UL) >> 16)))
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static INLINE uint16
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bcmswap16(uint16 val)
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{
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return BCMSWAP16(val);
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}
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static INLINE uint32
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bcmswap32(uint32 val)
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{
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return BCMSWAP32(val);
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}
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static INLINE uint32
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bcmswap32by16(uint32 val)
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{
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return BCMSWAP32BY16(val);
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}
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/* buf - start of buffer of shorts to swap */
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/* len - byte length of buffer */
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static INLINE void
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bcmswap16_buf(uint16 *buf, uint len)
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{
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len = len/2;
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while (len--) {
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*buf = bcmswap16(*buf);
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buf++;
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}
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}
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#ifndef hton16
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#ifndef IL_BIGENDIAN
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#define HTON16(i) BCMSWAP16(i)
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#define hton16(i) bcmswap16(i)
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#define hton32(i) bcmswap32(i)
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#define ntoh16(i) bcmswap16(i)
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#define ntoh32(i) bcmswap32(i)
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#define ltoh16(i) (i)
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#define ltoh32(i) (i)
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#define htol16(i) (i)
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#define htol32(i) (i)
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#else
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#define HTON16(i) (i)
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#define hton16(i) (i)
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#define hton32(i) (i)
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#define ntoh16(i) (i)
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#define ntoh32(i) (i)
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#define ltoh16(i) bcmswap16(i)
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#define ltoh32(i) bcmswap32(i)
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#define htol16(i) bcmswap16(i)
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#define htol32(i) bcmswap32(i)
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#endif /* IL_BIGENDIAN */
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#endif /* hton16 */
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#ifndef IL_BIGENDIAN
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#define ltoh16_buf(buf, i)
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#define htol16_buf(buf, i)
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#else
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#define ltoh16_buf(buf, i) bcmswap16_buf((uint16*)buf, i)
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#define htol16_buf(buf, i) bcmswap16_buf((uint16*)buf, i)
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#endif /* IL_BIGENDIAN */
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/*
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* store 16-bit value to unaligned little endian byte array.
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*/
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static INLINE void
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htol16_ua_store(uint16 val, uint8 *bytes)
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{
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bytes[0] = val&0xff;
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bytes[1] = val>>8;
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}
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/*
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* store 32-bit value to unaligned little endian byte array.
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*/
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static INLINE void
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htol32_ua_store(uint32 val, uint8 *bytes)
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{
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bytes[0] = val&0xff;
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bytes[1] = (val>>8)&0xff;
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bytes[2] = (val>>16)&0xff;
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bytes[3] = val>>24;
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}
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/*
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* store 16-bit value to unaligned network(big) endian byte array.
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*/
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static INLINE void
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hton16_ua_store(uint16 val, uint8 *bytes)
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{
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bytes[1] = val&0xff;
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bytes[0] = val>>8;
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}
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/*
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* store 32-bit value to unaligned network(big) endian byte array.
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*/
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static INLINE void
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hton32_ua_store(uint32 val, uint8 *bytes)
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{
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bytes[3] = val&0xff;
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bytes[2] = (val>>8)&0xff;
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bytes[1] = (val>>16)&0xff;
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bytes[0] = val>>24;
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}
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/*
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* load 16-bit value from unaligned little endian byte array.
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*/
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static INLINE uint16
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ltoh16_ua(void *bytes)
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{
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return (((uint8*)bytes)[1]<<8)+((uint8 *)bytes)[0];
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}
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/*
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* load 32-bit value from unaligned little endian byte array.
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*/
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static INLINE uint32
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ltoh32_ua(void *bytes)
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{
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return (((uint8*)bytes)[3]<<24)+(((uint8*)bytes)[2]<<16)+
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(((uint8*)bytes)[1]<<8)+((uint8*)bytes)[0];
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}
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/*
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* load 16-bit value from unaligned big(network) endian byte array.
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*/
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static INLINE uint16
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ntoh16_ua(void *bytes)
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{
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return (((uint8*)bytes)[0]<<8)+((uint8*)bytes)[1];
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}
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/*
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* load 32-bit value from unaligned big(network) endian byte array.
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*/
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static INLINE uint32
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ntoh32_ua(void *bytes)
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{
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return (((uint8*)bytes)[0]<<24)+(((uint8*)bytes)[1]<<16)+
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(((uint8*)bytes)[2]<<8)+((uint8*)bytes)[3];
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}
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#define ltoh_ua(ptr) (\
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sizeof(*(ptr)) == sizeof(uint8) ? *(uint8 *)ptr : \
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sizeof(*(ptr)) == sizeof(uint16) ? (((uint8 *)ptr)[1]<<8)+((uint8 *)ptr)[0] : \
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(((uint8 *)ptr)[3]<<24)+(((uint8 *)ptr)[2]<<16)+(((uint8 *)ptr)[1]<<8)+((uint8 *)ptr)[0] \
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)
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#define ntoh_ua(ptr) (\
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sizeof(*(ptr)) == sizeof(uint8) ? *(uint8 *)ptr : \
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sizeof(*(ptr)) == sizeof(uint16) ? (((uint8 *)ptr)[0]<<8)+((uint8 *)ptr)[1] : \
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(((uint8 *)ptr)[0]<<24)+(((uint8 *)ptr)[1]<<16)+(((uint8 *)ptr)[2]<<8)+((uint8 *)ptr)[3] \
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)
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#endif /* _BCMENDIAN_H_ */
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