[ci skip] style fixes, multipart add test
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@ -51,7 +51,7 @@ macro_rules! impl_map_from {
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}
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}
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#[cfg(not(all(feature="x64asm", target_arch = "x86_64")))]
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#[cfg(not(all(feature="x64asm", target_arch="x86_64")))]
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macro_rules! uint_overflowing_add {
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($name:ident, $n_words:expr, $self_expr: expr, $other: expr) => ({
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uint_overflowing_add_reg!($name, $n_words, $self_expr, $other)
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@ -89,7 +89,7 @@ macro_rules! uint_overflowing_add_reg {
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}
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#[cfg(all(feature="x64asm", target_arch = "x86_64"))]
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#[cfg(all(feature="x64asm", target_arch="x86_64"))]
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macro_rules! uint_overflowing_add {
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(U256, $n_words: expr, $self_expr: expr, $other: expr) => ({
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let mut result: [u64; 4] = unsafe { mem::uninitialized() };
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@ -119,7 +119,7 @@ macro_rules! uint_overflowing_add {
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)
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}
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#[cfg(not(all(feature="x64asm", target_arch = "x86_64")))]
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#[cfg(not(all(feature="x64asm", target_arch="x86_64")))]
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macro_rules! uint_overflowing_sub {
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($name:ident, $n_words: expr, $self_expr: expr, $other: expr) => ({
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let res = overflowing!((!$other).overflowing_add(From::from(1u64)));
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@ -128,7 +128,7 @@ macro_rules! uint_overflowing_sub {
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})
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}
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#[cfg(all(feature="x64asm", target_arch = "x86_64"))]
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#[cfg(all(feature="x64asm", target_arch="x86_64"))]
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macro_rules! uint_overflowing_sub {
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(U256, $n_words: expr, $self_expr: expr, $other: expr) => ({
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let mut result: [u64; 4] = unsafe { mem::uninitialized() };
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@ -158,7 +158,7 @@ macro_rules! uint_overflowing_sub {
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})
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}
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#[cfg(all(feature="x64asm", target_arch = "x86_64"))]
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#[cfg(all(feature="x64asm", target_arch="x86_64"))]
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macro_rules! uint_overflowing_mul {
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(U256, $n_words: expr, $self_expr: expr, $other: expr) => ({
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let mut result: [u64; 4] = unsafe { mem::uninitialized() };
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@ -257,7 +257,7 @@ macro_rules! uint_overflowing_mul {
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)
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}
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#[cfg(not(all(feature="x64asm", target_arch = "x86_64")))]
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#[cfg(not(all(feature="x64asm", target_arch="x86_64")))]
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macro_rules! uint_overflowing_mul {
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($name:ident, $n_words: expr, $self_expr: expr, $other: expr) => ({
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uint_overflowing_mul_reg!($name, $n_words, $self_expr, $other)
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@ -1468,5 +1468,26 @@ mod tests {
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fn display_uint_zero() {
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assert_eq!(format!("{}", U256::from(0)), "0");
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}
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#[test]
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fn u256_multi_adds() {
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let (result, _) = U256([0, 0, 0, 0]).overflowing_add(U256([0, 0, 0, 0]));
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assert_eq!(result, U256([0, 0, 0, 0]));
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let (result, _) = U256([0, 0, 0, 1]).overflowing_add(U256([0, 0, 0, 1]));
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assert_eq!(result, U256([0, 0, 0, 2]));
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let (result, overflow) = U256([0, 0, 2, 1]).overflowing_add(U256([0, 0, 3, 1]));
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assert_eq!(result, U256([0, 0, 5, 2]));
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assert!(!overflow);
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let (_, overflow) = U256([::std::u64::MAX, ::std::u64::MAX, ::std::u64::MAX, ::std::u64::MAX])
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.overflowing_add(U256([::std::u64::MAX, ::std::u64::MAX, ::std::u64::MAX, ::std::u64::MAX]));
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assert!(overflow);
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let (_, overflow) = U256([0, 0, 0, ::std::u64::MAX]).overflowing_add(U256([0, 0, 0, ::std::u64::MAX]));
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assert!(overflow);
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}
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}
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