28 lines
527 B
Rust
28 lines
527 B
Rust
pub fn to_usize(x: isize) -> usize {
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let double_x = x << 1;
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if x.is_positive() || x == 0 {
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double_x as usize
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} else {
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(-double_x - 1) as usize
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}
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}
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pub fn to_isize(u: usize) -> isize {
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((u >> 1) as isize) ^ (-((u & 1) as isize))
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}
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pub fn to_u128(x: i128) -> u128 {
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let double_x = x << 1;
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if x.is_positive() || x == 0 {
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double_x as u128
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} else {
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(-double_x - 1) as u128
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}
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}
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pub fn to_i128(u: u128) -> i128 {
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((u >> 1) as i128) ^ (-((u & 1) as i128))
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}
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