77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
/* @(#)byteorder.h 1.8 09/05/05 Copyright 1998,1999 Heiko Eissfeldt, Copyright 2006-2009 J. Schilling */
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#if !defined(_BYTEORDER_H) || !defined(MYBYTE_ORDER)
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#undef _BYTEORDER_H
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#define _BYTEORDER_H
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#undef MYBYTE_ORDER
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#define MYBYTE_ORDER 1
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#include <schily/btorder.h>
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/*
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* supply the byte order macros
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*/
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/*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* See the file CDDL.Schily.txt in this distribution for details.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file CDDL.Schily.txt from this distribution.
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*/
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#if defined(WORDS_BIGENDIAN)
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#define MY_BIG_ENDIAN 1
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#define MY_LITTLE_ENDIAN 0
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#else
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#define MY_BIG_ENDIAN 0
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#define MY_LITTLE_ENDIAN 1
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#endif
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#undef cpu_to_le32
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#undef cpu_to_le16
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#undef cpu_to_be32
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#undef cpu_to_be16
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#undef le32_to_cpu
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#undef le16_to_cpu
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#undef be32_to_cpu
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#undef be16_to_cpu
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#define revert4bytes(x) \
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((unsigned long int) ((((unsigned long int)(x) & ULONG_C(0x000000ff)) << 24) | \
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(((unsigned long int)(x) & ULONG_C(0x0000ff00)) << 8) | \
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(((unsigned long int)(x) & ULONG_C(0x00ff0000)) >> 8) | \
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(((unsigned long int)(x) & ULONG_C(0xff000000)) >> 24)))
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#define revert2bytes(x) \
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((unsigned short int) ((((unsigned short int)(x) & 0x00ff) << 8) | \
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(((unsigned short int)(x) & 0xff00) >> 8)))
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#if MY_BIG_ENDIAN == 1
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#define cpu_to_le32(x) revert4bytes(x)
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#define cpu_to_le16(x) revert2bytes(x)
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#define le32_to_cpu(x) cpu_to_le32(x)
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#define le16_to_cpu(x) cpu_to_le16(x)
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#define cpu_to_be32(x) (x)
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#define cpu_to_be16(x) (x)
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#define be32_to_cpu(x) (x)
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#define be16_to_cpu(x) (x)
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#else
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#define cpu_to_be32(x) revert4bytes(x)
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#define cpu_to_be16(x) revert2bytes(x)
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#define be32_to_cpu(x) cpu_to_be32(x)
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#define be16_to_cpu(x) cpu_to_be16(x)
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#define cpu_to_le32(x) (x)
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#define cpu_to_le16(x) (x)
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#define le32_to_cpu(x) (x)
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#define le16_to_cpu(x) (x)
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#endif
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#define GET_LE_UINT_FROM_CHARP(p) ((unsigned int)((*(p+3))<<24)|((*(p+2))<<16)|((*(p+1))<<8)|(*(p)))
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#define GET_BE_UINT_FROM_CHARP(p) ((unsigned int)((*(p))<<24)|((*(p+1))<<16)|((*(p+2))<<8)|(*(p+3)))
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#endif /* _BYTEORDER_H */
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