31 righe
735 B
C
31 righe
735 B
C
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#include "utils.h"
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/**
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* Converts the value of 'in' to 'outlen' bytes in big-endian byte order.
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*/
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void ull_to_bytes(unsigned char *out, unsigned int outlen,
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unsigned long long in)
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{
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int i;
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/* Iterate over out in decreasing order, for big-endianness. */
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for (i = outlen - 1; i >= 0; i--) {
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out[i] = in & 0xff;
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in = in >> 8;
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}
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}
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/**
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* Converts the inlen bytes in 'in' from big-endian byte order to an integer.
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*/
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unsigned long long bytes_to_ull(const unsigned char *in, unsigned int inlen)
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{
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unsigned long long retval = 0;
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unsigned int i;
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for (i = 0; i < inlen; i++) {
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retval |= ((unsigned long long)in[i]) << (8*(inlen - 1 - i));
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}
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return retval;
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}
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