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15 lines
576 B
C++
15 lines
576 B
C++
#include "crc32.h"
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unsigned long CRC16(const unsigned char *buf, int size, int key)
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{
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// This is computed as the lowest 16 bits of an Ethernet CRC32 checksum
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// where the key is prepended to the data in little endian order.
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uint8 keyBuf[] = {(uint8)((key >> 0) & 0xff),
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(uint8)((key >> 8) & 0xff),
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(uint8)((key >> 16) & 0xff),
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(uint8)((key >> 24) & 0xff)};
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uint32 crc = CRC32::Update(keyBuf, sizeof(uint32));
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crc = CRC32::Update(buf, size, crc);
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return CRC32::Finish(crc) & 0xffff;
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}
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