Mercurial > hg > th-libs
view th_endian.h @ 408:6b50bf4317c0
Improve printf implementation somewhat. The logic is not very pretty and not
yet perfect, will need to rethink things at some point.
author | Matti Hamalainen <ccr@tnsp.org> |
---|---|
date | Wed, 09 Mar 2016 12:05:16 +0200 |
parents | 4fee16cb28c1 |
children | 1b3472ba7b23 |
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/* * Endianess handling * Programmed and designed by Matti 'ccr' Hamalainen * (C) Copyright 2002-2016 Tecnic Software productions (TNSP) * * Please read file 'COPYING' for information on license and distribution. */ #ifndef TH_ENDIAN_H #define TH_ENDIAN_H #ifdef HAVE_CONFIG_H # include "config.h" #endif #include "th_types.h" #ifdef __cplusplus extern "C" { #endif /* Check endianess */ #ifndef TH_BYTEORDER # error Undefined byteorder (TH_BYTEORDER not set.) #endif #define TH_BIG_ENDIAN 1234 #define TH_LITTLE_ENDIAN 4321 /* Endianess swapping macros */ #define TH_SWAP_16_LE_BE(value) ((uint16_t) ( \ (uint16_t) ((uint16_t) (value) >> 8) | \ (uint16_t) ((uint16_t) (value) << 8)) ) #define TH_SWAP_32_LE_BE(value) ((uint32_t) ( \ (((uint32_t) (value) & (uint32_t) 0x000000ffU) << 24) | \ (((uint32_t) (value) & (uint32_t) 0x0000ff00U) << 8) | \ (((uint32_t) (value) & (uint32_t) 0x00ff0000U) >> 8) | \ (((uint32_t) (value) & (uint32_t) 0xff000000U) >> 24))) #define TH_SWAP_64_LE_BE(value) ((uint64_t) ( \ (((uint64_t) (value) & (uint64_t) 0x00000000000000ffULL) << 56) | \ (((uint64_t) (value) & (uint64_t) 0x000000000000ff00ULL) << 40) | \ (((uint64_t) (value) & (uint64_t) 0x0000000000ff0000ULL) << 24) | \ (((uint64_t) (value) & (uint64_t) 0x00000000ff000000ULL) << 8) | \ (((uint64_t) (value) & (uint64_t) 0x000000ff00000000ULL) >> 8) | \ (((uint64_t) (value) & (uint64_t) 0x0000ff0000000000ULL) >> 24) | \ (((uint64_t) (value) & (uint64_t) 0x00ff000000000000ULL) >> 40) | \ (((uint64_t) (value) & (uint64_t) 0xff00000000000000ULL) >> 56))) /* Macros that swap only when needed ... */ #if (TH_BYTEORDER == TH_BIG_ENDIAN) #define TH_LE16_TO_NATIVE(value) TH_SWAP_16_LE_BE(value) #define TH_LE32_TO_NATIVE(value) TH_SWAP_32_LE_BE(value) #define TH_NATIVE_TO_LE16(value) TH_SWAP_16_LE_BE(value) #define TH_NATIVE_TO_LE32(value) TH_SWAP_32_LE_BE(value) #define TH_BE16_TO_NATIVE(value) ((uint16_t) (value)) #define TH_BE32_TO_NATIVE(value) ((uint32_t) (value)) #define TH_NATIVE_TO_BE16(value) ((uint16_t) (value)) #define TH_NATIVE_TO_BE32(value) ((uint32_t) (value)) #define TH_LE64_TO_NATIVE(value) TH_SWAP_64_LE_BE(value) #define TH_NATIVE_TO_LE64(value) TH_SWAP_64_LE_BE(value) #define TH_BE64_TO_NATIVE(value) ((uint64_t) (value)) #define TH_NATIVE_TO_BE64(value) ((uint64_t) (value)) // !TH_BIG_ENDIAN #elif (TH_BYTEORDER == TH_LITTLE_ENDIAN) #define TH_LE16_TO_NATIVE(value) ((uint16_t) (value)) #define TH_LE32_TO_NATIVE(value) ((uint32_t) (value)) #define TH_NATIVE_TO_LE16(value) ((uint16_t) (value)) #define TH_NATIVE_TO_LE32(value) ((uint32_t) (value)) #define TH_BE16_TO_NATIVE(value) TH_SWAP_16_LE_BE(value) #define TH_BE32_TO_NATIVE(value) TH_SWAP_32_LE_BE(value) #define TH_NATIVE_TO_BE16(value) TH_SWAP_16_LE_BE(value) #define TH_NATIVE_TO_BE32(value) TH_SWAP_32_LE_BE(value) #define TH_LE64_TO_NATIVE(value) ((uint64_t) (value)) #define TH_NATIVE_TO_LE64(value) ((uint64_t) (value)) #define TH_BE64_TO_NATIVE(value) TH_SWAP_64_LE_BE(value) #define TH_NATIVE_TO_BE64(value) TH_SWAP_64_LE_BE(value) #else # error Unsupported byte order! #endif // // NE = Native Endian, aka same as native // Provided for completeness // #define TH_NE16_TO_NATIVE(value) (value) #define TH_NE32_TO_NATIVE(value) (value) #define TH_NE64_TO_NATIVE(value) (value) #define TH_NATIVE_TO_NE16(value) (value) #define TH_NATIVE_TO_NE32(value) (value) #define TH_NATIVE_TO_NE64(value) (value) #ifdef __cplusplus } #endif #endif // TH_ENDIAN_H