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71 lines
1.5 KiB
C
71 lines
1.5 KiB
C
/*
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from PCP pcp/libpcp/util.c.
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Convert byte arrays from big endian to numbers and vice versa. Do
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not take care about host endianess. In Rob Pikes' words:
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https://commandcenter.blogspot.de/2012/04/byte-order-fallacy.html
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*/
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#ifndef DATA2WIRE_H
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#define DATA2WIRE_H
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#include <inttypes.h>
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inline uint64_t wire_to_data64(uint8_t *data) {
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uint64_t i =
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((uint64_t)data[7]<<0) |
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((uint64_t)data[6]<<8) |
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((uint64_t)data[5]<<16) |
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((uint64_t)data[4]<<24) |
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((uint64_t)data[3]<<32) |
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((uint64_t)data[2]<<40) |
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((uint64_t)data[1]<<48) |
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((uint64_t)data[0]<<56);
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return i;
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}
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inline uint32_t wire_to_data32(uint8_t *data) {
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uint32_t i =
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((uint32_t)data[3]<<0) |
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((uint32_t)data[2]<<8) |
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((uint32_t)data[1]<<16) |
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((uint32_t)data[0]<<24);
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return i;
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}
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inline uint16_t wire_to_data16(uint8_t *data) {
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uint16_t i =
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((uint16_t)data[1]<<0) |
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((uint16_t)data[0]<<8);
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return i;
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}
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inline void data64_to_wire(uint64_t i, uint8_t *data) {
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data[0] = (i >> 56) & 0xFF;
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data[1] = (i >> 48) & 0xFF;
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data[2] = (i >> 40) & 0xFF;
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data[3] = (i >> 32) & 0xFF;
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data[4] = (i >> 24) & 0xFF;
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data[5] = (i >> 16) & 0xFF;
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data[6] = (i >> 8) & 0xFF;
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data[7] = i & 0xFF;
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}
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inline void data32_to_wire(uint32_t i, uint8_t *data) {
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data[0] = (i >> 24) & 0xFF;
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data[1] = (i >> 16) & 0xFF;
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data[2] = (i >> 8) & 0xFF;
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data[3] = i & 0xFF;
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}
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inline void data16_to_wire(uint16_t i, uint8_t *data) {
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data[0] = (i >> 8) & 0xFF;
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data[1] = i & 0xFF;
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}
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#endif
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