55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
#include "endian.h"
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enum cu_endian_e cu_endian;
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static const union {
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uint8_t bytes[4];
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uint32_t value;
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} host_order = {
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{0, 1, 2, 3}
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};
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#define ORDER_LITTLE_ENDIAN 0x03020100
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#define ORDER_BIG_ENDIAN 0x00010203
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static enum cu_endian_e endian_detect()
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{
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if (host_order.value == ORDER_LITTLE_ENDIAN)
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return LittleEndian;
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else if (host_order.value == ORDER_BIG_ENDIAN)
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return BigEndian;
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else return MiddleEndian;
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}
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static uint16_t sw_bswap16(uint16_t val)
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{
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return (val << 8) | (val >> 8);
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}
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static uint32_t sw_bswap32(uint32_t val)
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{
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return ((val >> 24) & 0xFF) << 0
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| ((val >> 16) & 0xFF) << 8
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| ((val >> 8) & 0xFF) << 16
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| ((val >> 0) & 0xFF) << 24;
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}
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static uint64_t sw_bswap64(uint64_t val)
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{
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return ((val >> 56) & 0xFF) << 0
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| ((val >> 48) & 0xFF) << 8
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| ((val >> 40) & 0xFF) << 16
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| ((val >> 32) & 0xFF) << 24
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| ((val >> 24) & 0xFF) << 32
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| ((val >> 16) & 0xFF) << 40
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| ((val >> 8) & 0xFF) << 48
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| ((val >> 0) & 0xFF) << 56;
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}
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#include <stdio.h>
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void cu_endian_init()
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{
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cu_endian = endian_detect();
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printf("%lx\t%lx\n", 0x12345678abcd8765, sw_bswap64(0x12345678abcd8765));
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}
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