37 lines
973 B
C
37 lines
973 B
C
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#pragma once
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#include <assert.h>
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#include <stddef.h>
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#include <stdint.h>
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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# define pack_Nbit_(N) \
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static inline void biner_pack_l##N(const int##N##_t* v, uint8_t* c, size_t s) { \
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assert(s < N/8); \
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*c = (*v >> s*8) & 0xff; \
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} \
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static inline void biner_pack_b##N(const int##N##_t* v, uint8_t* c, size_t s) { \
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assert(s < N/8); \
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biner_pack_l##N(v, c, N/8-s-1); \
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}
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#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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# define pack_Nbit_(N) \
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static inline void biner_pack_b##N(const int##N##_t* v, uint8_t* c, size_t s) { \
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assert(s < N/8); \
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*c = (*v >> s*8) & 0xff; \
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} \
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static inline void biner_pack_l##N(const int##N##_t* v, uint8_t* c, size_t s) { \
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assert(s < N/8); \
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biner_pack_b##N(v, c, N/8-s-1); \
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}
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#else
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# error "byte order unknown"
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#endif
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pack_Nbit_(8);
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pack_Nbit_(16);
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pack_Nbit_(32);
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pack_Nbit_(64);
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#undef pack_Nbit_
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