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1 #ifndef BAM_ENDIAN_H
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2 #define BAM_ENDIAN_H
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3
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4 #include <stdint.h>
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5
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6 static inline int bam_is_big_endian()
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7 {
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8 long one= 1;
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9 return !(*((char *)(&one)));
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10 }
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11 static inline uint16_t bam_swap_endian_2(uint16_t v)
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12 {
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13 return (uint16_t)(((v & 0x00FF00FFU) << 8) | ((v & 0xFF00FF00U) >> 8));
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14 }
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15 static inline void *bam_swap_endian_2p(void *x)
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16 {
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17 *(uint16_t*)x = bam_swap_endian_2(*(uint16_t*)x);
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18 return x;
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19 }
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20 static inline uint32_t bam_swap_endian_4(uint32_t v)
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21 {
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22 v = ((v & 0x0000FFFFU) << 16) | (v >> 16);
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23 return ((v & 0x00FF00FFU) << 8) | ((v & 0xFF00FF00U) >> 8);
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24 }
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25 static inline void *bam_swap_endian_4p(void *x)
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26 {
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27 *(uint32_t*)x = bam_swap_endian_4(*(uint32_t*)x);
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28 return x;
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29 }
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30 static inline uint64_t bam_swap_endian_8(uint64_t v)
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31 {
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32 v = ((v & 0x00000000FFFFFFFFLLU) << 32) | (v >> 32);
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33 v = ((v & 0x0000FFFF0000FFFFLLU) << 16) | ((v & 0xFFFF0000FFFF0000LLU) >> 16);
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34 return ((v & 0x00FF00FF00FF00FFLLU) << 8) | ((v & 0xFF00FF00FF00FF00LLU) >> 8);
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35 }
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36 static inline void *bam_swap_endian_8p(void *x)
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37 {
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38 *(uint64_t*)x = bam_swap_endian_8(*(uint64_t*)x);
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39 return x;
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40 }
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41
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42 #endif
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