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Merge RandBigUint and RandBigInt into single trait

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This commit is contained in:
David Creswick 2013-09-09 11:31:40 -05:00
parent 54368afc03
commit 4946e0ea5e
1 changed files with 17 additions and 21 deletions
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38
src/libextra/num/bigint.rs
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@ -521,27 +521,6 @@ impl FromStrRadix for BigUint {
}
}
trait RandBigUInt {
/// Generate a random BigUint of the given bit size.
fn gen_biguint(&mut self, bit_size: uint) -> BigUint;
}
impl<R: Rng> RandBigUInt for R {
/// Generate a random BigUint of the given bit size.
fn gen_biguint(&mut self, bit_size: uint) -> BigUint {
let (digits, rem) = bit_size.div_rem(&BigDigit::bits);
let mut data = vec::with_capacity(digits+1);
for _ in range(0, digits) {
data.push(self.gen());
}
if rem > 0 {
let final_digit: BigDigit = self.gen();
data.push(final_digit >> (BigDigit::bits - rem));
}
return BigUint::new(data);
}
}
impl BigUint {
/// Creates and initializes an BigUint.
#[inline]
@ -1074,12 +1053,29 @@ impl FromStrRadix for BigInt {
}
trait RandBigInt {
/// Generate a random BigUint of the given bit size.
fn gen_biguint(&mut self, bit_size: uint) -> BigUint;
/// Generate a random BigInt of the given bit size.
fn gen_bigint(&mut self, bit_size: uint) -> BigInt;
}
impl<R: Rng> RandBigInt for R {
/// Generate a random BigUint of the given bit size.
fn gen_biguint(&mut self, bit_size: uint) -> BigUint {
let (digits, rem) = bit_size.div_rem(&BigDigit::bits);
let mut data = vec::with_capacity(digits+1);
for _ in range(0, digits) {
data.push(self.gen());
}
if rem > 0 {
let final_digit: BigDigit = self.gen();
data.push(final_digit >> (BigDigit::bits - rem));
}
return BigUint::new(data);
}
/// Generate a random BigInt of the given bit size.
fn gen_bigint(&mut self, bit_size: uint) -> BigInt {
// Generate a random BigUint...
let biguint = self.gen_biguint(bit_size);