word32 SetLength(word32 length, byte* output)
{
word32 i = 0;
if (length < LONG_LENGTH)
output[i++] = length;
else {
output[i++] = BytePrecision(length) | 0x80;
for (int j = BytePrecision(length); j; --j) {
output[i] = length >> (j - 1) * 8;
i++;
}
}
return i;
}
unsigned int PolynomialMod2::ByteCount() const
{
unsigned wordCount = WordCount();
if (wordCount)
return (wordCount-1)*WORD_SIZE + BytePrecision(reg[wordCount-1]);
else
return 0;
}
/**
* Gets the number of bytes required to represent this RInteger.
*
* @return The size of the integer in bytes.
*
*/
EXPORT_C TUint TInteger::ByteCount() const
{
TUint wordCount = WordCount();
if(wordCount)
{
return (wordCount-1)*WORD_SIZE + BytePrecision((Ptr())[wordCount-1]);
}
else
{
return 0;
}
}
word32 RandomNumberGenerator::GenerateWord32(word32 min, word32 max)
{
word32 range = max-min;
const int maxBytes = BytePrecision(range);
const int maxBits = BitPrecision(range);
word32 value;
do
{
value = 0;
for (int i=0; i<maxBytes; i++)
value = (value << 8) | GenerateByte();
value = Crop(value, maxBits);
} while (value > range);
return value+min;
}