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94 lines
2.0 KiB
C
94 lines
2.0 KiB
C
/**
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* Jingga
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*
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* @copyright Jingga
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* @license OMS License 2.0
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* @version 1.0.0
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* @link https://jingga.app
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*/
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#ifndef TOS_UTILS_ENDIAN_H
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#define TOS_UTILS_ENDIAN_H
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#include "../stdlib/Types.h"
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// Automatically perform endian swap if necessary
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// If we are on little endian (e.g. Win32) we swap big endian data but not little endian
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#if _WIN32 || __LITTLE_ENDIAN
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#define SWAP_ENDIAN_LITTLE(val) (val)
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#define SWAP_ENDIAN_BIG(val) endian_swap(val)
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#else
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#define SWAP_ENDIAN_LITTLE(val) endian_swap(val)
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#define SWAP_ENDIAN_BIG(val) (val)
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#endif
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inline
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bool is_little_endian()
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{
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uint32 num = 1;
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return ((int32) (*(char *) & num)) == 1;
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}
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inline
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void endian_swap(uint16 *val)
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{
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uint16 v = *val;
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*val = ((v << 8) | (v >> 8));
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}
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inline
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void endian_swap(int16 *val)
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{
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uint16 v = (uint16) (*val);
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*val = (int16) ((v << 8) | (v >> 8));
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}
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inline
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void endian_swap(uint32 *val)
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{
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uint32 v = *val;
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*val = ((v << 24)
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| ((v & 0xFF00) << 8)
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| ((v >> 8) & 0xFF00)
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| (v >> 24));
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}
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inline
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void endian_swap(int32 *val)
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{
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uint32 v = (uint32) (*val);
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*val = (int32) ((v << 24)
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| ((v & 0xFF00) << 8)
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| ((v >> 8) & 0xFF00)
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| (v >> 24));
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}
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inline
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void endian_swap(uint64 *val)
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{
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uint64 v = *val;
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*val = ((v << 56)
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| ((v & 0x000000000000FF00ULL) << 40)
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| ((v & 0x0000000000FF0000ULL) << 24)
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| ((v & 0x00000000FF000000ULL) << 8)
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| ((v & 0x000000FF00000000ULL) >> 8)
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| ((v & 0x0000FF0000000000ULL) >> 24)
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| ((v & 0x00FF000000000000ULL) >> 40)
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| (v >> 56));
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}
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inline
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void endian_swap(int64 *val)
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{
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uint64 v = (uint64) (*val);
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*val = (int64) ((v << 56)
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| ((v & 0x000000000000FF00ULL) << 40)
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| ((v & 0x0000000000FF0000ULL) << 24)
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| ((v & 0x00000000FF000000ULL) << 8)
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| ((v & 0x000000FF00000000ULL) >> 8)
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| ((v & 0x0000FF0000000000ULL) >> 24)
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| ((v & 0x00FF000000000000ULL) >> 40)
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| (v >> 56));
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}
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#endif |