mirror of
https://github.com/jart/cosmopolitan.git
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81 lines
2.1 KiB
C
81 lines
2.1 KiB
C
#ifndef COSMOPOLITAN_TOOL_BUILD_LIB_ENDIAN_H_
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#define COSMOPOLITAN_TOOL_BUILD_LIB_ENDIAN_H_
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static inline uint8_t Read8(const uint8_t *p) {
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return p[0];
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}
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static inline void Write8(uint8_t *p, uint8_t v) {
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*p = v;
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}
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static inline uint16_t Read16(const uint8_t *p) {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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uint16_t v;
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__builtin_memcpy(&v, p, sizeof(v));
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return v;
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#else
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return p[1] << 8 | p[0];
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#endif
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}
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static inline void Write16(uint8_t *p, uint16_t v) {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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__builtin_memcpy(p, &v, sizeof(v));
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#else
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p[0] = (0x00FF & v) >> 000;
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p[1] = (0xFF00 & v) >> 010;
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#endif
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}
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static inline uint32_t Read32(const uint8_t *p) {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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uint32_t v;
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__builtin_memcpy(&v, p, sizeof(v));
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return v;
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#else
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return ((uint32_t)p[0] << 000 | (uint32_t)p[1] << 010 |
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(uint32_t)p[2] << 020 | (uint32_t)p[3] << 030);
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#endif
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}
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static inline void Write32(uint8_t *p, uint32_t v) {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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__builtin_memcpy(p, &v, sizeof(v));
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#else
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p[0] = (0x000000FF & v) >> 000;
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p[1] = (0x0000FF00 & v) >> 010;
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p[2] = (0x00FF0000 & v) >> 020;
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p[3] = (0xFF000000 & v) >> 030;
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#endif
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}
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static inline uint64_t Read64(const uint8_t *p) {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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uint64_t v;
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__builtin_memcpy(&v, p, sizeof(v));
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return v;
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#else
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return ((uint64_t)p[0] << 000 | (uint64_t)p[1] << 010 |
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(uint64_t)p[2] << 020 | (uint64_t)p[3] << 030 |
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(uint64_t)p[4] << 040 | (uint64_t)p[5] << 050 |
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(uint64_t)p[6] << 060 | (uint64_t)p[7] << 070);
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#endif
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}
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static inline void Write64(uint8_t *p, uint64_t v) {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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__builtin_memcpy(p, &v, sizeof(v));
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#else
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p[0] = (0x00000000000000FF & v) >> 000;
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p[1] = (0x000000000000FF00 & v) >> 010;
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p[2] = (0x0000000000FF0000 & v) >> 020;
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p[3] = (0x00000000FF000000 & v) >> 030;
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p[4] = (0x000000FF00000000 & v) >> 040;
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p[5] = (0x0000FF0000000000 & v) >> 050;
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p[6] = (0x00FF000000000000 & v) >> 060;
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p[7] = (0xFF00000000000000 & v) >> 070;
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#endif
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}
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#endif /* COSMOPOLITAN_TOOL_BUILD_LIB_ENDIAN_H_ */
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