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47 lines
942 B
C
47 lines
942 B
C
// (C) 2018 University of Bristol. See License.txt
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#ifndef _Data
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#define _Data
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#include <string.h>
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#include "Exceptions/Exceptions.h"
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typedef unsigned char octet;
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// Assumes word is a 64 bit value
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#ifdef WIN32
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typedef unsigned __int64 word;
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#else
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typedef unsigned long word;
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#endif
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#define BROADCAST 0
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#define ROUTE 1
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#define TERMINATE 2
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#define GO 3
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inline void encode_length(octet *buff, size_t len, size_t n_bytes)
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{
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if (n_bytes > 8)
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throw invalid_length("length field cannot be more than 64 bits");
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if (n_bytes < 8 && (len > (1ULL << (8 * n_bytes))))
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throw invalid_length("length too large for length field");
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for (size_t i = 0; i < n_bytes; i++)
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buff[i] = len >> (8 * i);
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}
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inline size_t decode_length(octet *buff, size_t n_bytes)
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{
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size_t len = 0;
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for (size_t i = 0; i < n_bytes; i++)
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{
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len += (size_t) buff[i] << (8 * i);
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}
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return len;
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}
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#endif
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