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// Convert 30-bit and MPZ numbers to 32-bit hexa strings for comparisons
// (c) EB Nov 2009
#ifndef Conversions_h
#define Conversions_h
// Convert X[N] from redundand representation in base 2^30
// to an hex string.
void convert30(int n,const int * x,std::string & out)
{
int nAux = 0; // Valid bits in aux
__int64 aux = 0;
std::vector<unsigned int> y(n,0);
int j = 0; // Next value in Y receiving bits
for (int i=0;i<n;i++)
{
// Insert X[i] into AUX
aux += ((__int64)x[i]<<nAux);
nAux += 30;
// Extract 32 bits if available
if (nAux>=32)
{
y[j++] = (unsigned int)(aux&0xFFFFFFFF);
aux >>= 32;
nAux -= 32;
}
}
// Extract last bits
while (nAux > 0)
{
y[j++] = (unsigned int)(aux&0xFFFFFFFF);
aux >>= 32;
nAux -= 32;
}
out.clear();
out.reserve(9*n+20);
char s[32];
bool first = true;
for (int i=n-1;i>=0;i--)
{
if (first)
{
if (y[i] == 0) continue;
first = false;
}
else out.push_back('.');
_snprintf(s,32,"%08X",y[i]);
out.append(s);
}
if (first) out.append("0");
}
#if CONFIG_USE_MPIR
// Convert mpz_t integer to a string
void convertMPZ(mpz_t x,std::string & out)
{
char * s = mpz_get_str(0,16,x);
if (s == 0) return; // Failed
int n = (int)strlen(s);
out.clear();
out.reserve(n+n/8+8);
int digits = 0;
while ( (digits+n)&7 ) { out.push_back('0'); digits++; } // Initial 0 to get a multiple of 8
for (int i=0;i<n;i++)
{
if ( (digits&7) == 0 && i>0 ) out.push_back('.');
out.push_back(toupper(s[i])); digits++;
}
free(s);
}
#endif
#endif // Conversions_h
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