1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140

//! Lazy bit vector adapters.
//!
//! This module defines adapters for dealing with bit vectors and other
//! types that implement [`Bits`]. It also defines the adaptors that
//! are returned by methods of the extension trait [`BitsExt`].
//!
//! [`Bits`]: ../trait.Bits.html
//! [`BitsExt`]: ../trait.BitsExt.html

#[macro_use]
mod bit_slice_adapter;
pub use self::bit_slice_adapter::BitSliceAdapter;

mod logic;
pub use self::logic::{BitNot, BitAnd, BitOr, BitXor, BitZip};

mod bit_fill;
pub use self::bit_fill::BitFill;

mod bit_concat;
pub use self::bit_concat::BitConcat;

mod bool_adapter;
pub use self::bool_adapter::BoolAdapter;

#[cfg(test)]
mod test {
    use {Bits, BitsExt, BitsMut, BitVec, BitSliceable};
    use super::BitSliceAdapter;

    fn assert_0001<T: Bits>(bits: &T) {
        assert_eq!( bits.bit_len(), 4 );

        assert!( !bits.get_bit(0) );
        assert!( !bits.get_bit(1) );
        assert!( !bits.get_bit(2) );
        assert!(  bits.get_bit(3) );

        let bv = bits.to_bit_vec();
        assert_eq!( bv, bit_vec![false, false, false, true] );
    }

    #[test]
    fn simple_not() {
        let bv: BitVec = bit_vec![true, true, true, false,];
        let not_bits = bv.bit_not();
        assert_0001(&not_bits);
    }

    #[test]
    fn simple_and() {
        let bv1: BitVec<u8> = bit_vec![ false, false, true, true, ];
        let bv2: BitVec<u8> = bit_vec![ false, true, false, true, ];
        let and_bits = bv1.bit_and(&bv2);
        assert_0001(&and_bits);
    }

    #[test]
    fn and_with_same_offset() {
        let bv1: BitVec<u8> = bit_vec![ true, false, false, true, true ];
        let bv2: BitVec<u8> = bit_vec![ true, false, true, false, true ];
        let bv_slice1 = bv1.bit_slice(1..);
        let bv_slice2 = bv2.bit_slice(1..);
        let and_bits = bv_slice1.bit_and(&bv_slice2);
        assert_0001(&and_bits);
    }

    #[test]
    fn and_with_different_offset() {
        let bv1: BitVec<u8> = bit_vec![ true, true, false, false, true, true ];
        let bv2: BitVec<u8> = bit_vec![ true, false, true, false, true ];
        let bv_slice1 = bv1.bit_slice(2..);
        let bv_slice2 = bv2.bit_slice(1..);
        let and_bits = bv_slice1.bit_and(&bv_slice2);
        assert_0001(&and_bits);
    }

    #[test]
    fn append() {
        let bv1: BitVec<u8> = bit_vec![false];
        let bv2: BitVec<u8> = bit_vec![true, true];
        let bv3: BitVec<u8> = bit_vec![false, false, false];

        let bv123 = bv1.bit_concat(&bv2).into_bit_concat(&bv3);
        let app12 = bv123.bit_concat(&bv123);
        let app24 = app12.bit_concat(&app12);
        let bv = BitVec::from_bits(&app24);

        assert_eq!(bv, bit_vec![false, true, true, false, false, false,
                                false, true, true, false, false, false,
                                false, true, true, false, false, false,
                                false, true, true, false, false, false]);
    }

    #[test]
    fn pad() {
        let bv1: BitVec = bit_vec![true, false, true, false];
        let bv2: BitVec = bit_vec![true, true];

        let bv3 = bv1.bit_or(bv2.bit_pad(bv1.bit_len())).to_bit_vec();

        assert_eq!( bv3, bit_vec![true, true, true, false] );
    }

    #[test]
    fn slice_adapter() {
        let bv1: BitVec = bit_vec![true, false, true, false, true, false, true, false];
        let bv2: BitVec = bit_vec![true, true, false, false, true, true, false, false];

        let bv3 = bv1.bit_xor(&bv2).bit_slice(1..7).to_bit_vec();

        assert_eq!( bv3, bit_vec![true, true, false, false, true, true] );
    }

    #[test]
    fn slice_adapter_mutation() {
        let mut bv: BitVec = bit_vec![true, false, true, false];

        {
            let mut slice = BitSliceAdapter::new(&mut bv, 1, 2);
            slice.set_bit(1, false);
        }

        assert_eq!( bv, bit_vec![true, false, false, false] );

        {
            let mut slice = BitSliceAdapter::new(&mut bv, 1, 2);
            slice.set_block(0, 0b111);
        }

        assert_eq!( bv, bit_vec![true, true, true, false] );
    }

    #[test]
    fn mixed_equality() {
        let bv1: BitVec = bit_vec![false, false, true, true];
        let bv2: BitVec = bit_vec![false, true, false, true];
        assert_eq!( bv1.bit_xor(&bv2), bit_vec![false, true, true, false] );
    }
}