258 lines
7.3 KiB
C
258 lines
7.3 KiB
C
/**
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* @file endian.h
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* @brief Byte order conversion
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*
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* @section License
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*
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* Copyright (C) 2010-2014 Oryx Embedded. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* @author Oryx Embedded (www.oryx-embedded.com)
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* @version 1.5.0
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**/
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#ifndef _ENDIAN_H
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#define _ENDIAN_H
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//Dependencies
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//#include "os_port.h"
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#include "generic/typedef.h"
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//#include <stdint.h>
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//#include "inttypes.h"
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//typedef uint32_t systime_t;
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//Compilation flags used to enable/disable features
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#define ENABLED (+1)
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#define DISABLED (-1)
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//Miscellaneous macros
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#ifndef FALSE
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#define FALSE 0
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#endif
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#ifndef TRUE
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#define TRUE 1
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#endif
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#ifndef LSB
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#define LSB(x) ((x) & 0xFF)
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#endif
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#ifndef MSB
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#define MSB(x) (((x) >> 8) & 0xFF)
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#endif
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#ifndef MIN
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#define MIN(a, b) ((a) < (b) ? (a) : (b))
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#endif
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#ifndef MAX
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#define MAX(a, b) ((a) > (b) ? (a) : (b))
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#endif
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#if 0
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//Load unaligned 16-bit integer (little-endian encoding)
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#define LOAD16LE(p) ((uint16_t) (((uint8_t *)(p))[0] | (((uint8_t *)(p))[1] << 8)))
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//Load unaligned 16-bit integer (big-endian encoding)
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#define LOAD16BE(p) ((uint16_t) ((((uint8_t *)(p))[0] << 8) | ((uint8_t *)(p))[1]))
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//Load unaligned 24-bit integer (little-endian encoding)
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#define LOAD24LE(p) ((uint32_t) (((uint8_t *)(p))[0] | \
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(((uint8_t *)(p))[1] << 8) | (((uint8_t *)(p))[2] << 16)))
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//Load unaligned 24-bit integer (big-endian encoding)
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#define LOAD24BE(p) ((uint32_t) ((((uint8_t *)(p))[0] << 16) | \
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(((uint8_t *)(p))[1] << 8) | ((uint8_t *)(p))[2]))
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//Load unaligned 32-bit integer (little-endian encoding)
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#define LOAD32LE(p) ((uint32_t) (((uint8_t *)(p))[0] | (((uint8_t *)(p))[1] << 8) | \
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(((uint8_t *)(p))[2] << 16) | (((uint8_t *)(p))[3] << 24)))
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//Load unaligned 32-bit integer (big-endian encoding)
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#define LOAD32BE(p) ((uint32_t) ((((uint8_t *)(p))[0] << 24) | (((uint8_t *)(p))[1] << 16) | \
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(((uint8_t *)(p))[2] << 8) | ((uint8_t *)(p))[3]))
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//Store unaligned 16-bit integer (little-endian encoding)
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#define STORE16LE(a, p) \
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((uint8_t *)(p))[0] = (a) & 0xFF, \
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((uint8_t *)(p))[1] = ((a) >> 8) & 0xFF
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//Store unaligned 32-bit integer (big-endian encoding)
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#define STORE16BE(a, p) \
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((uint8_t *)(p))[0] = ((a) >> 8) & 0xFF, \
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((uint8_t *)(p))[1] = (a) & 0xFF
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//Store unaligned 24-bit integer (little-endian encoding)
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#define STORE24LE(a, p) \
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((uint8_t *)(p))[0] = (a) & 0xFF, \
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((uint8_t *)(p))[1] = ((a) >> 8) & 0xFF, \
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((uint8_t *)(p))[2] = ((a) >> 16) & 0xFF
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//Store unaligned 24-bit integer (big-endian encoding)
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#define STORE24BE(a, p) \
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((uint8_t *)(p))[0] = ((a) >> 16) & 0xFF, \
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((uint8_t *)(p))[1] = ((a) >> 8) & 0xFF, \
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((uint8_t *)(p))[2] = (a) & 0xFF
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//Store unaligned 32-bit integer (little-endian encoding)
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#define STORE32LE(a, p) \
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((uint8_t *)(p))[0] = (a) & 0xFF, \
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((uint8_t *)(p))[1] = ((a) >> 8) & 0xFF, \
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((uint8_t *)(p))[2] = ((a) >> 16) & 0xFF, \
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((uint8_t *)(p))[3] = ((a) >> 24) & 0xFF
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//Store unaligned 32-bit integer (big-endian encoding)
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#define STORE32BE(a, p) \
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((uint8_t *)(p))[0] = ((a) >> 24) & 0xFF, \
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((uint8_t *)(p))[1] = ((a) >> 16) & 0xFF, \
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((uint8_t *)(p))[2] = ((a) >> 8) & 0xFF, \
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((uint8_t *)(p))[3] = (a) & 0xFF
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#endif
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//Swap a 16-bit integer
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#define _SWAP16(x) ( \
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(((x) & 0x00FF) << 8) | \
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(((x) & 0xFF00) >> 8))
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//Swap a 32-bit integer
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#define _SWAP32(x) ( \
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(((x) & 0x000000FFUL) << 24) | \
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(((x) & 0x0000FF00UL) << 8) | \
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(((x) & 0x00FF0000UL) >> 8) | \
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(((x) & 0xFF000000UL) >> 24))
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//Swap a 64-bit integer
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#define _SWAP64(x) ( \
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(((x) & 0x00000000000000FFULL) << 56) | \
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(((x) & 0x000000000000FF00ULL) << 40) | \
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(((x) & 0x0000000000FF0000ULL) << 24) | \
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(((x) & 0x00000000FF000000ULL) << 8) | \
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(((x) & 0x000000FF00000000ULL) >> 8) | \
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(((x) & 0x0000FF0000000000ULL) >> 24) | \
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(((x) & 0x00FF000000000000ULL) >> 40) | \
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(((x) & 0xFF00000000000000ULL) >> 56))
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#undef NTOHL
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//#define _BIG_ENDIAN
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//Big-endian machine?
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#ifdef _BIG_ENDIAN
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//Host byte order to network byte order
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#define HTONS(value) (value)
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#define HTONL(value) (value)
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#define htons(value) (value)
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#define htonl(value) (value)
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//Network byte order to host byte order
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#define NTOHS(value) (value)
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#define NTOHL(value) (value)
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#define ntohs(value) (value)
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#define ntohl(value) (value)
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//Host byte order to little-endian byte order
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#define HTOLE16(value) _SWAP16(value)
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#define HTOLE32(value) _SWAP32(value)
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#define HTOLE64(value) _SWAP64(value)
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#define htole16(value) _swap16(value)
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#define htole32(value) _swap32(value)
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#define htole64(value) _swap64(value)
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//Little-endian byte order to host byte order
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#define LETOH16(value) _SWAP16(value)
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#define LETOH32(value) _SWAP32(value)
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#define LETOH64(value) _SWAP64(value)
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#define letoh16(value) _swap16(value)
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#define letoh32(value) _swap32(value)
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#define letoh64(value) _swap64(value)
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//Host byte order to big-endian byte order
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#define HTOBE16(value) (value)
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#define HTOBE32(value) (value)
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#define HTOBE64(value) (value)
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#define htobe16(value) (value)
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#define htobe32(value) (value)
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#define htobe64(value) (value)
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//Big-endian byte order to host byte order
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#define BETOH16(value) (value)
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#define BETOH32(value) (value)
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#define BETOH64(value) (value)
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#define betoh16(value) (value)
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#define betoh32(value) (value)
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#define betoh64(value) (value)
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//Little-endian machine?
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#else
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//Host byte order to network byte order
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#define HTONS(value) _SWAP16(value)
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#define HTONL(value) _SWAP32(value)
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#define htons(value) _swap16(value)
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#define htonl(value) _swap32(value)
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//Network byte order to host byte order
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#define NTOHS(value) _SWAP16(value)
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#define NTOHL(value) _SWAP32(value)
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//#define ntohs(value) _swap16(value)
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//#define ntohl(value) _swap32(value)
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//Host byte order to little-endian byte order
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#define HTOLE16(value) (value)
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#define HTOLE32(value) (value)
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#define HTOLE64(value) (value)
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#define htole16(value) (value)
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#define htole32(value) (value)
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#define htole64(value) (value)
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//Little-endian byte order to host byte order
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#define LETOH16(value) (value)
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#define LETOH32(value) (value)
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#define LETOH64(value) (value)
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#define letoh16(value) (value)
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#define letoh32(value) (value)
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#define letoh64(value) (value)
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//Host byte order to big-endian byte order
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#define HTOBE16(value) _SWAP16(value)
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#define HTOBE32(value) _SWAP32(value)
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#define HTOBE64(value) _SWAP64(value)
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#define htobe16(value) _swap16(value)
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#define htobe32(value) _swap32(value)
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#define htobe64(value) _swap64(value)
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//Big-endian byte order to host byte order
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#define BETOH16(value) _SWAP16(value)
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#define BETOH32(value) _SWAP32(value)
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#define BETOH64(value) _SWAP64(value)
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#define betoh16(value) _swap16(value)
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#define betoh32(value) _swap32(value)
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#define betoh64(value) _swap64(value)
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#endif
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//Byte order conversion functions
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u16 _swap16(u16 value);
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u32 _swap32(u32 value);
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u64 _swap64(u64 value);
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#endif
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