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extra: Add ToBigInt and ToBigUint traits

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This commit is contained in:
Erick Tryzelaar 2013-09-24 20:07:44 -07:00
parent 9de7ad2d8c
commit 01be9e9904
1 changed files with 90 additions and 0 deletions
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90
src/libextra/num/bigint.rs
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@ -547,6 +547,52 @@ impl FromPrimitive for BigUint {
}
}
pub trait ToBigUint {
fn to_biguint(&self) -> Option<BigUint>;
}
impl ToBigUint for BigInt {
#[inline]
fn to_biguint(&self) -> Option<BigUint> {
if self.sign == Plus {
Some(self.data.clone())
} else if self.sign == Zero {
Some(Zero::zero())
} else {
None
}
}
}
impl ToBigUint for BigUint {
#[inline]
fn to_biguint(&self) -> Option<BigUint> {
Some(self.clone())
}
}
macro_rules! impl_to_biguint(
($T:ty, $from_ty:path) => {
impl ToBigUint for $T {
#[inline]
fn to_biguint(&self) -> Option<BigUint> {
$from_ty(*self)
}
}
}
)
impl_to_biguint!(int, FromPrimitive::from_int)
impl_to_biguint!(i8, FromPrimitive::from_i8)
impl_to_biguint!(i16, FromPrimitive::from_i16)
impl_to_biguint!(i32, FromPrimitive::from_i32)
impl_to_biguint!(i64, FromPrimitive::from_i64)
impl_to_biguint!(uint, FromPrimitive::from_uint)
impl_to_biguint!(u8, FromPrimitive::from_u8)
impl_to_biguint!(u16, FromPrimitive::from_u16)
impl_to_biguint!(u32, FromPrimitive::from_u32)
impl_to_biguint!(u64, FromPrimitive::from_u64)
impl ToStrRadix for BigUint {
fn to_str_radix(&self, radix: uint) -> ~str {
assert!(1 < radix && radix <= 16);
@ -1140,6 +1186,50 @@ impl FromPrimitive for BigInt {
}
}
pub trait ToBigInt {
fn to_bigint(&self) -> Option<BigInt>;
}
impl ToBigInt for BigInt {
#[inline]
fn to_bigint(&self) -> Option<BigInt> {
Some(self.clone())
}
}
impl ToBigInt for BigUint {
#[inline]
fn to_bigint(&self) -> Option<BigInt> {
if self.is_zero() {
Some(Zero::zero())
} else {
Some(BigInt { sign: Plus, data: self.clone() })
}
}
}
macro_rules! impl_to_bigint(
($T:ty, $from_ty:path) => {
impl ToBigInt for $T {
#[inline]
fn to_bigint(&self) -> Option<BigInt> {
$from_ty(*self)
}
}
}
)
impl_to_bigint!(int, FromPrimitive::from_int)
impl_to_bigint!(i8, FromPrimitive::from_i8)
impl_to_bigint!(i16, FromPrimitive::from_i16)
impl_to_bigint!(i32, FromPrimitive::from_i32)
impl_to_bigint!(i64, FromPrimitive::from_i64)
impl_to_bigint!(uint, FromPrimitive::from_uint)
impl_to_bigint!(u8, FromPrimitive::from_u8)
impl_to_bigint!(u16, FromPrimitive::from_u16)
impl_to_bigint!(u32, FromPrimitive::from_u32)
impl_to_bigint!(u64, FromPrimitive::from_u64)
impl ToStrRadix for BigInt {
#[inline]
fn to_str_radix(&self, radix: uint) -> ~str {