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Add impl From<u128, u16, u8, usize, i128, i16, i8, isize> for Mpz #34

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Add impl From<u128, u16, u8, usize, i128, i16, i8, isize> for Mpz #34

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47584a5
impl From<u128, u16, u8, usize, i128, i16, i8, isize> for Mpz
emlun Sep 13, 2020
91f6f5a
Extract macro impl_from_uint! and impl_from_iint!
emlun Sep 13, 2020
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89 changes: 40 additions & 49 deletions src/mpz.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -845,63 +845,54 @@ impl<'a> From<&'a [u8]> for Mpz {
}
}

impl From<u64> for Mpz {
fn from(other: u64) -> Mpz {
unsafe {
let mut res = Mpz::new();
__gmpz_import(&mut res.mpz, 1, -1, size_of::<u64>() as size_t, 0, 0,
&other as *const u64 as *const c_void);
res
}
}
}

impl From<u32> for Mpz {
fn from(other: u32) -> Mpz {
unsafe {
let mut res = Mpz::new();
__gmpz_import(&mut res.mpz, 1, -1, size_of::<u32>() as size_t, 0, 0,
&other as *const u32 as *const c_void);
res
}
}
}

impl From<i64> for Mpz {
fn from(other: i64) -> Mpz {
unsafe {
let mut res = Mpz::new();

if other.is_negative() {
__gmpz_import(&mut res.mpz, 1, -1, size_of::<i64>() as size_t, 0, 0,
&(other ^ -1i64) as *const i64 as *const c_void);
__gmpz_com(&mut res.mpz, &res.mpz);
} else {
__gmpz_import(&mut res.mpz, 1, -1, size_of::<i64>() as size_t, 0, 0,
&other as *const i64 as *const c_void);
macro_rules! impl_from_uint {
($typ: ident) => {
impl From<$typ> for Mpz {
fn from(other: $typ) -> Mpz {
let mut res = Mpz::new();
unsafe {
__gmpz_import(&mut res.mpz, 1, -1, size_of::<$typ>() as size_t, 0, 0,
&other as *const $typ as *const c_void);
}
res
}
res
}
}
}

impl From<i32> for Mpz {
fn from(other: i32) -> Mpz {
unsafe {
let mut res = Mpz::new();

if other.is_negative() {
__gmpz_import(&mut res.mpz, 1, -1, size_of::<i32>() as size_t, 0, 0,
&(other ^ -1i32) as *const i32 as *const c_void);
__gmpz_com(&mut res.mpz, &res.mpz);
} else {
__gmpz_import(&mut res.mpz, 1, -1, size_of::<i32>() as size_t, 0, 0,
&other as *const i32 as *const c_void);
impl_from_uint!(u128);
impl_from_uint!(u64);
impl_from_uint!(u32);
impl_from_uint!(u16);
impl_from_uint!(u8);
impl_from_uint!(usize);

macro_rules! impl_from_iint {
($typ: ident) => {
impl From<$typ> for Mpz {
fn from(other: $typ) -> Mpz {
let mut res = Mpz::new();
unsafe {
if other.is_negative() {
__gmpz_import(&mut res.mpz, 1, -1, size_of::<$typ>() as size_t, 0, 0,
&(other ^ (-1 as $typ)) as *const $typ as *const c_void);
__gmpz_com(&mut res.mpz, &res.mpz);
} else {
__gmpz_import(&mut res.mpz, 1, -1, size_of::<$typ>() as size_t, 0, 0,
&other as *const $typ as *const c_void);
}
}
res
}
res
}

}
}
impl_from_iint!(i128);
impl_from_iint!(i64);
impl_from_iint!(i32);
impl_from_iint!(i16);
impl_from_iint!(i8);
impl_from_iint!(isize);

impl_oper!(BitAnd, bitand, BitAndAssign, bitand_assign, __gmpz_and);
impl_oper!(BitOr, bitor, BitOrAssign, bitor_assign, __gmpz_ior);
Expand Down
32 changes: 29 additions & 3 deletions src/test.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -186,9 +186,35 @@ mod mpz {

#[test]
fn test_from_int() {
let x: Mpz = From::<i64>::from(150);
assert!(x.to_string() == "150".to_string());
assert!(x == FromStr::from_str("150").unwrap());
fn tst<T>(x: T, expected: &str)
where
Mpz: From<T>,
{
let x: Mpz = Mpz::from(x);
assert_eq!(x.to_string(), expected);
assert_eq!(x, FromStr::from_str(expected).unwrap());
}

tst(150_u8, "150");
tst(150_u16, "150");
tst(150_u32, "150");
tst(150_u64, "150");
tst(150_u128, "150");
tst(150_usize, "150");

tst(75_i8, "75");
tst(150_i16, "150");
tst(150_i32, "150");
tst(150_i64, "150");
tst(150_i128, "150");
tst(150_isize, "150");

tst(-75_i8, "-75");
tst(-150_i16, "-150");
tst(-150_i32, "-150");
tst(-150_i64, "-150");
tst(-150_i128, "-150");
tst(-150_isize, "-150");
}

#[test]
Expand Down