crypto_bigint/uint/
macros.rs

1//! Macros used to define traits on aliases of `Uint`.
2
3// TODO(tarcieri): use `generic_const_exprs` when stable to make generic around bits.
4macro_rules! impl_uint_aliases {
5    ($(($name:ident, $bits:expr, $doc:expr)),+) => {
6        $(
7            #[doc = $doc]
8            #[doc="unsigned big integer."]
9            pub type $name = Uint<{ nlimbs($bits) }>;
10
11            impl $crate::traits::EncodedSize for [u8; { nlimbs($bits) * Limb::BYTES }] {
12                type Target = EncodedUint<{ nlimbs($bits) }>;
13            }
14
15            impl $crate::traits::EncodedSize for EncodedUint<{ nlimbs($bits) }> {
16                type Target = [u8; { nlimbs($bits) * Limb::BYTES }];
17            }
18        )+
19     };
20}
21
22macro_rules! impl_uint_concat_split_mixed {
23    ($name:ident, $size:literal) => {
24        impl $crate::traits::Concat<{ U64::LIMBS * $size }> for Uint<{ <$name>::LIMBS - U64::LIMBS * $size }>
25        {
26            type Output = $name;
27        }
28
29        impl $crate::traits::Split<{ U64::LIMBS * $size }> for $name
30        {
31            type Output = Uint<{ <$name>::LIMBS - U64::LIMBS * $size }>;
32        }
33
34    };
35    ($name:ident, [ $($size:literal),+ ]) => {
36        $(
37            impl_uint_concat_split_mixed!($name, $size);
38        )+
39    };
40    ($( ($name:ident, $sizes:tt), )+) => {
41        $(
42            impl_uint_concat_split_mixed!($name, $sizes);
43        )+
44    };
45}
46
47macro_rules! impl_uint_concat_split_even {
48    ($name:ident) => {
49        #[allow(clippy::integer_division_remainder_used, reason = "constant")]
50        impl $crate::traits::Concat<{ <$name>::LIMBS / 2 }> for Uint<{ <$name>::LIMBS / 2 }>
51        {
52            type Output = $name;
53        }
54
55        #[allow(clippy::integer_division_remainder_used, reason = "constant")]
56        impl $crate::traits::Split<{ <$name>::LIMBS / 2 }> for $name
57        {
58            type Output = Uint<{ <$name>::LIMBS / 2 }>;
59        }
60
61        #[allow(clippy::integer_division_remainder_used, reason = "constant")]
62        impl $crate::traits::SplitEven for $name
63        {
64            type Output = Uint<{ <$name>::LIMBS / 2 }>;
65        }
66    };
67    ($($name:ident,)+) => {
68        $(
69            impl_uint_concat_split_even!($name);
70        )+
71    }
72}
crypto_bigint/uint/macros.rs

crypto_bigint/uint/
macros.rs
