denyhosts/clamscan/libclamav/tomsfastmath/bin/fp_radix_size.c

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2022-10-22 18:41:00 +08:00
/* TomsFastMath, a fast ISO C bignum library.
*
* This project is meant to fill in where LibTomMath
* falls short. That is speed ;-)
*
* This project is public domain and free for all purposes.
*
* Tom St Denis, tomstdenis@gmail.com
*/
#include "bignum_fast.h"
int fp_radix_size(fp_int *a, int radix, int *size);
int fp_radix_size(fp_int *a, int radix, int *size)
{
int digs;
fp_int t;
fp_digit d;
*size = 0;
/* check range of the radix */
if (radix < 2 || radix > 64) {
return FP_VAL;
}
/* quick out if its zero */
if (fp_iszero(a) == 1) {
*size = 2;
return FP_OKAY;
}
fp_init_copy(&t, a);
/* if it is negative output a - */
if (t.sign == FP_NEG) {
(*size)++;
t.sign = FP_ZPOS;
}
digs = 0;
while (fp_iszero (&t) == FP_NO) {
fp_div_d (&t, (fp_digit) radix, &t, &d);
(*size)++;
}
/* append a NULL so the string is properly terminated */
(*size)++;
return FP_OKAY;
}
/* $Source: /cvs/libtom/tomsfastmath/src/bin/fp_radix_size.c,v $ */
/* $Revision: 1.1 $ */
/* $Date: 2006/12/31 21:25:53 $ */