diff options
Diffstat (limited to 'libtommath/bn_mp_read_radix.c')
-rw-r--r-- | libtommath/bn_mp_read_radix.c | 110 |
1 files changed, 55 insertions, 55 deletions
diff --git a/libtommath/bn_mp_read_radix.c b/libtommath/bn_mp_read_radix.c index 12aa499..bc31cc5 100644 --- a/libtommath/bn_mp_read_radix.c +++ b/libtommath/bn_mp_read_radix.c @@ -16,73 +16,73 @@ */ /* read a string [ASCII] in a given radix */ -int mp_read_radix (mp_int * a, const char *str, int radix) +int mp_read_radix(mp_int *a, const char *str, int radix) { - int y, res, neg; - char ch; + int y, res, neg; + char ch; - /* zero the digit bignum */ - mp_zero(a); + /* zero the digit bignum */ + mp_zero(a); - /* make sure the radix is ok */ - if ((radix < 2) || (radix > 64)) { - return MP_VAL; - } + /* make sure the radix is ok */ + if ((radix < 2) || (radix > 64)) { + return MP_VAL; + } - /* if the leading digit is a - * minus set the sign to negative. - */ - if (*str == '-') { - ++str; - neg = MP_NEG; - } else { - neg = MP_ZPOS; - } + /* if the leading digit is a + * minus set the sign to negative. + */ + if (*str == '-') { + ++str; + neg = MP_NEG; + } else { + neg = MP_ZPOS; + } - /* set the integer to the default of zero */ - mp_zero (a); - - /* process each digit of the string */ - while (*str != '\0') { - /* if the radix <= 36 the conversion is case insensitive - * this allows numbers like 1AB and 1ab to represent the same value - * [e.g. in hex] - */ - ch = (radix <= 36) ? (char)toupper((int)*str) : *str; - for (y = 0; y < 64; y++) { - if (ch == mp_s_rmap[y]) { - break; - } - } + /* set the integer to the default of zero */ + mp_zero(a); - /* if the char was found in the map - * and is less than the given radix add it - * to the number, otherwise exit the loop. - */ - if (y < radix) { - if ((res = mp_mul_d (a, (mp_digit) radix, a)) != MP_OKAY) { - return res; + /* process each digit of the string */ + while (*str != '\0') { + /* if the radix <= 36 the conversion is case insensitive + * this allows numbers like 1AB and 1ab to represent the same value + * [e.g. in hex] + */ + ch = (radix <= 36) ? (char)toupper((int)*str) : *str; + for (y = 0; y < 64; y++) { + if (ch == mp_s_rmap[y]) { + break; + } } - if ((res = mp_add_d (a, (mp_digit) y, a)) != MP_OKAY) { - return res; + + /* if the char was found in the map + * and is less than the given radix add it + * to the number, otherwise exit the loop. + */ + if (y < radix) { + if ((res = mp_mul_d(a, (mp_digit)radix, a)) != MP_OKAY) { + return res; + } + if ((res = mp_add_d(a, (mp_digit)y, a)) != MP_OKAY) { + return res; + } + } else { + break; } - } else { - break; - } - ++str; - } + ++str; + } - /* if an illegal character was found, fail. */ - if (!(*str == '\0' || *str == '\r' || *str == '\n')) { + /* if an illegal character was found, fail. */ + if (!(*str == '\0' || *str == '\r' || *str == '\n')) { mp_zero(a); return MP_VAL; - } + } - /* set the sign only if a != 0 */ - if (mp_iszero(a) != MP_YES) { - a->sign = neg; - } - return MP_OKAY; + /* set the sign only if a != 0 */ + if (mp_iszero(a) != MP_YES) { + a->sign = neg; + } + return MP_OKAY; } #endif |