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fix 2's-completement encoding for non full with signed ints

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This commit is contained in:
Robin Appelman 2019-08-28 02:44:35 +02:00
commit 2fd2b49810
3 changed files with 22 additions and 44 deletions
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48
tests/tests.rs
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@ -123,7 +123,7 @@ fn read_u64_be() {
fn read_i8_le() {
let buffer = BitBuffer::new(BYTES.to_vec(), LittleEndian);
assert_eq!(buffer.read_int::<i8>(0, 3).unwrap(), -0b01);
assert_eq!(buffer.read_int::<i8>(0, 3).unwrap(), -0b11);
assert_eq!(buffer.read_int::<i8>(0, 8).unwrap(), -0b100_1011);
}
@ -132,7 +132,7 @@ fn read_i8_be() {
let buffer = BitBuffer::new(BYTES.to_vec(), BigEndian);
assert_eq!(buffer.read_int::<i8>(1, 2).unwrap(), 0b1);
assert_eq!(buffer.read_int::<i8>(0, 3).unwrap(), -0b01);
assert_eq!(buffer.read_int::<i8>(0, 3).unwrap(), -0b11);
assert_eq!(buffer.read_int::<i8>(0, 8).unwrap(), -0b100_1011);
}
@ -141,7 +141,7 @@ fn read_i16_le() {
let buffer = BitBuffer::new(BYTES.to_vec(), LittleEndian);
assert_eq!(buffer.read_int::<i16>(6, 12).unwrap(), 0b0_0110_1010_10);
assert_eq!(buffer.read_int::<i16>(6, 13).unwrap(), -0b00_0110_1010_10);
assert_eq!(buffer.read_int::<i16>(6, 13).unwrap(), -0b11_1001_0101_10);
}
#[test]
@ -149,7 +149,7 @@ fn read_i16_be() {
let buffer = BitBuffer::new(BYTES.to_vec(), BigEndian);
assert_eq!(buffer.read_int::<i16>(6, 12).unwrap(), 0b1_0110_1010_10);
assert_eq!(buffer.read_int::<i16>(7, 12).unwrap(), -0b0110_1010_101);
assert_eq!(buffer.read_int::<i16>(7, 12).unwrap(), -0b1001_0101_011);
}
#[test]
@ -160,56 +160,32 @@ fn read_i32_le() {
buffer.read_int::<i32>(6, 24).unwrap(),
0b1_1001_1010_1100_0110_1010_10
);
assert_eq!(
buffer.read_int::<i32>(6, 26).unwrap(),
-0b001_1001_1010_1100_0110_1010_10
);
assert_eq!(buffer.read_int::<i32>(6, 26).unwrap(), -26824278);
}
#[test]
fn read_i32_be() {
let buffer = BitBuffer::new(BYTES.to_vec(), BigEndian);
assert_eq!(
buffer.read_int::<i32>(7, 24).unwrap(),
-0b0110_1010_1010_1100_1001_100
);
assert_eq!(buffer.read_int::<i32>(7, 24).unwrap(), -4893108);
}
#[test]
fn read_i64_le() {
let buffer = BitBuffer::new(BYTES.to_vec(), LittleEndian);
assert_eq!(
buffer.read_int::<i64>(6, 34).unwrap(),
-0b001_1001_1001_1001_1010_1100_0110_1010_10
);
assert_eq!(
buffer.read_int::<i64>(6, 59).unwrap(),
-0b1110_01111001_1001_1001_1001_1001_1001_1001_1001_1010_1100_0110_1010_10
);
assert_eq!(
buffer.read_int::<i64>(1, 64).unwrap(),
-0b1110_01111001_1001_1001_1001_1001_1001_1001_1001_1010_1100_0110_1010_1011_010
);
assert_eq!(buffer.read_int::<i64>(6, 34).unwrap(), -6871928406);
assert_eq!(buffer.read_int::<i64>(6, 59).unwrap(), -27471957726940758);
assert_eq!(buffer.read_int::<i64>(1, 64).unwrap(), -879102647262104230);
}
#[test]
fn read_i64_be() {
let buffer = BitBuffer::new(BYTES.to_vec(), BigEndian);
assert_eq!(
buffer.read_int::<i64>(7, 34).unwrap(),
-0b0110_1010_1010_1100_1001_1001_1001_1001_1
);
assert_eq!(
buffer.read_int::<i64>(7, 60).unwrap(),
-0b0110_1010_1010_1100_1001_1001_1001_1001_1001_1001_1001_1001_1110_0111_100
);
assert_eq!(
buffer.read_int::<i64>(7, 64).unwrap(),
-0b0110_1010_1010_1100_1001_1001_1001_1001_1001_1001_1001_1001_1110_0111_1001_100
);
assert_eq!(buffer.read_int::<i64>(7, 34).unwrap(), -5010541773);
assert_eq!(buffer.read_int::<i64>(7, 60).unwrap(), -336251766397153476);
assert_eq!(buffer.read_int::<i64>(7, 64).unwrap(), -5380028262354455604);
}
#[test]