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Diffstat (limited to 'icedax/byteorder.h')
-rw-r--r-- | icedax/byteorder.h | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/icedax/byteorder.h b/icedax/byteorder.h new file mode 100644 index 0000000..0fa8eb6 --- /dev/null +++ b/icedax/byteorder.h @@ -0,0 +1,67 @@ +/* + * This file has been modified for the cdrkit suite. + * + * The behaviour and appearence of the program code below can differ to a major + * extent from the version distributed by the original author(s). + * + * For details, see Changelog file distributed with the cdrkit package. If you + * received this file from another source then ask the distributing person for + * a log of modifications. + * + */ + +/* @(#)byteorder.h 1.3 03/07/20 Copyright 1998,1999 Heiko Eissfeldt */ +#ifndef MYBYTE_ORDER +#define MYBYTE_ORDER 1 +/* supply the byte order macros */ + +#if defined (WORDS_BIGENDIAN) +# define MY_BIG_ENDIAN 1 +# define MY_LITTLE_ENDIAN 0 +#else +# define MY_BIG_ENDIAN 0 +# define MY_LITTLE_ENDIAN 1 +#endif + +# undef cpu_to_le32 +# undef cpu_to_le16 +# undef cpu_to_be32 +# undef cpu_to_be16 +# undef le32_to_cpu +# undef le16_to_cpu +# undef be32_to_cpu +# undef be16_to_cpu + +# define revert4bytes(x) \ + ((unsigned long int)((((unsigned long int)(x) & ULONG_C(0x000000ff)) << 24) | \ + (((unsigned long int)(x) & ULONG_C(0x0000ff00)) << 8) | \ + (((unsigned long int)(x) & ULONG_C(0x00ff0000)) >> 8) | \ + (((unsigned long int)(x) & ULONG_C(0xff000000)) >> 24))) +# define revert2bytes(x) \ + ((unsigned short int)((((unsigned short int)(x) & 0x00ff) << 8) | \ + (((unsigned short int)(x) & 0xff00) >> 8))) + +#if MY_BIG_ENDIAN == 1 +# define cpu_to_le32(x) revert4bytes(x) +# define cpu_to_le16(x) revert2bytes(x) +# define le32_to_cpu(x) cpu_to_le32(x) +# define le16_to_cpu(x) cpu_to_le16(x) +# define cpu_to_be32(x) (x) +# define cpu_to_be16(x) (x) +# define be32_to_cpu(x) (x) +# define be16_to_cpu(x) (x) +#else +# define cpu_to_be32(x) revert4bytes(x) +# define cpu_to_be16(x) revert2bytes(x) +# define be32_to_cpu(x) cpu_to_be32(x) +# define be16_to_cpu(x) cpu_to_be16(x) +# define cpu_to_le32(x) (x) +# define cpu_to_le16(x) (x) +# define le32_to_cpu(x) (x) +# define le16_to_cpu(x) (x) +#endif + +#define GET_LE_UINT_FROM_CHARP(p) ((unsigned int)((*(p+3))<<24)|((*(p+2))<<16)|((*(p+1))<<8)|(*(p))) +#define GET_BE_UINT_FROM_CHARP(p) ((unsigned int)((*(p))<<24)|((*(p+1))<<16)|((*(p+2))<<8)|(*(p+3))) + +#endif /* ifndef MYBYTE_ORDER */ |