crypto_bigint/uint/boxed/
from.rs

1//! `From`-like conversions for [`BoxedUint`].
2
3use crate::{BoxedUint, Limb, Odd, Uint, Word, U128, U64};
4use alloc::{boxed::Box, vec::Vec};
5use core::mem;
6
7impl From<u8> for BoxedUint {
8    fn from(n: u8) -> Self {
9        vec![Limb::from(n); 1].into()
10    }
11}
12
13impl From<u16> for BoxedUint {
14    fn from(n: u16) -> Self {
15        vec![Limb::from(n); 1].into()
16    }
17}
18
19impl From<u32> for BoxedUint {
20    fn from(n: u32) -> Self {
21        vec![Limb::from(n); 1].into()
22    }
23}
24
25impl From<u64> for BoxedUint {
26    fn from(n: u64) -> Self {
27        U64::from(n).into()
28    }
29}
30
31impl From<u128> for BoxedUint {
32    fn from(n: u128) -> Self {
33        U128::from(n).into()
34    }
35}
36
37impl From<Limb> for BoxedUint {
38    fn from(limb: Limb) -> Self {
39        vec![limb; 1].into()
40    }
41}
42
43impl From<&[Limb]> for BoxedUint {
44    fn from(limbs: &[Limb]) -> BoxedUint {
45        Self {
46            limbs: limbs.into(),
47        }
48    }
49}
50
51impl From<Box<[Limb]>> for BoxedUint {
52    fn from(limbs: Box<[Limb]>) -> BoxedUint {
53        Vec::from(limbs).into()
54    }
55}
56
57impl From<Vec<Limb>> for BoxedUint {
58    fn from(mut limbs: Vec<Limb>) -> BoxedUint {
59        if limbs.is_empty() {
60            limbs.push(Limb::ZERO);
61        }
62
63        Self {
64            limbs: limbs.into_boxed_slice(),
65        }
66    }
67}
68
69impl From<Vec<Word>> for BoxedUint {
70    fn from(mut words: Vec<Word>) -> BoxedUint {
71        // SAFETY: `Limb` is a `repr(transparent)` newtype for `Word`
72        #[allow(unsafe_code)]
73        unsafe {
74            let ptr = words.as_mut_ptr() as *mut Limb;
75            let len = words.len();
76            let capacity = words.capacity();
77            mem::forget(words);
78            Vec::<Limb>::from_raw_parts(ptr, len, capacity)
79        }
80        .into()
81    }
82}
83
84impl<const LIMBS: usize> From<Uint<LIMBS>> for BoxedUint {
85    #[inline]
86    fn from(uint: Uint<LIMBS>) -> BoxedUint {
87        Self::from(&uint)
88    }
89}
90
91impl<const LIMBS: usize> From<&Uint<LIMBS>> for BoxedUint {
92    #[inline]
93    fn from(uint: &Uint<LIMBS>) -> BoxedUint {
94        Vec::from(uint.to_limbs()).into()
95    }
96}
97
98impl<const LIMBS: usize> From<Odd<Uint<LIMBS>>> for BoxedUint {
99    #[inline]
100    fn from(uint: Odd<Uint<LIMBS>>) -> BoxedUint {
101        Self::from(&uint.0)
102    }
103}
104
105impl<const LIMBS: usize> From<&Odd<Uint<LIMBS>>> for BoxedUint {
106    #[inline]
107    fn from(uint: &Odd<Uint<LIMBS>>) -> BoxedUint {
108        Self::from(&uint.0)
109    }
110}
111
112impl<const LIMBS: usize> From<Odd<Uint<LIMBS>>> for Odd<BoxedUint> {
113    #[inline]
114    fn from(uint: Odd<Uint<LIMBS>>) -> Odd<BoxedUint> {
115        Odd(BoxedUint::from(&uint.0))
116    }
117}
118
119impl<const LIMBS: usize> From<&Odd<Uint<LIMBS>>> for Odd<BoxedUint> {
120    #[inline]
121    fn from(uint: &Odd<Uint<LIMBS>>) -> Odd<BoxedUint> {
122        Odd(BoxedUint::from(&uint.0))
123    }
124}
crypto_bigint/uint/boxed/from.rs

crypto_bigint/uint/boxed/
from.rs
