mirror of
https://github.com/ScrelliCopter/VGM-Tools
synced 2025-02-21 04:09:25 +11:00
69 lines
2.2 KiB
C
69 lines
2.2 KiB
C
#ifndef COMMON_ENDIAN_H
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#define COMMON_ENDIAN_H
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#ifdef __APPLE__
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# include <machine/endian.h>
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#elif defined( __linux__ ) || defined( __CYGWIN__ ) || defined( __OpenBSD__ )
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# include <endian.h>
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#elif defined( __NetBSD__ ) || defined( __FreeBSD__ ) || defined( __DragonFly__ )
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# include <sys/endian.h>
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# ifdef __FreeBSD__
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# define LITTLE_ENDIAN _LITTLE_ENDIAN
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# define BIG_ENDIAN _BIG_ENDIAN
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# define BYTE_ORDER _BYTE_ORDER
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# endif
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#elif defined( _MSC_VER ) || defined( _WIN16 ) || defined( _WIN32 ) || defined( _WIN64 )
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# ifdef _MSC_VER
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# define LITTLE_ENDIAN 1234
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# define BIG_ENDIAN 4321
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# if defined( _M_IX86 ) || defined( _M_X64 ) || defined( _M_AMD64 ) || defined( _M_IA64 )
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# define BYTE_ORDER LITTLE_ENDIAN
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# elif defined( _M_PPC )
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// Probably not reliable but eh
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# define BYTE_ORDER BIG_ENDIAN
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# endif
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# elif defined( __GNUC__ )
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# include <sys/param.h>
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# endif
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#endif
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#if !defined( BYTE_ORDER ) || !defined( LITTLE_ENDIAN ) || !defined( BIG_ENDIAN ) || \
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!( BYTE_ORDER == LITTLE_ENDIAN || BYTE_ORDER == BIG_ENDIAN )
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# error "Couldn't determine endianness or unsupported platform"
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#endif
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#ifdef _MSC_VER
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# define swap32(X) _byteswap_ulong((X))
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# define swap16(X) _byteswap_ushort((X))
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#elif ( __GNUC__ == 4 && __GNUC_MINOR__ >= 8 ) || ( __GNUC__ > 4 )
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# define swap32(X) __builtin_bswap32((X))
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# define swap16(X) __builtin_bswap16((X))
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// Apparently smelly GCC 5 blows up on this test so this is done separately for Clang
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#elif defined( __has_builtin ) && __has_builtin( __builtin_bswap32 ) && __has_builtin( __builtin_bswap16 )
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# define swap32(X) __builtin_bswap32((X))
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# define swap16(X) __builtin_bswap16((X))
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#else
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static inline uint32_t swap32(uint32_t v)
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{
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return (v << 24U) | ((v << 8U) & 0x00FF0000U) | ((v >> 8U) & 0x0000FF00U) | (v >> 24U);
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}
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static inline uint16_t swap16(uint16_t v)
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{
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return (v << 8U) | (v >> 8U);
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}
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#endif
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#if BYTE_ORDER == LITTLE_ENDIAN
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# define SWAP_LE32(V) (V)
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# define SWAP_LE16(V) (V)
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# define SWAP_BE32(V) swap32((V))
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# define SWAP_BE16(V) swap16((V))
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#elif BYTE_ORDER == BIG_ENDIAN
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# define SWAP_LE32(V) swap32((V))
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# define SWAP_LE16(V) swap16((V))
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# define SWAP_BE32(V) (V)
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# define SWAP_BE16(V) (V)
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#endif
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#endif//COMMON_ENDIAN_H
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