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
#![doc(html_root_url="https://sfackler.github.io/rust-postgres-array/doc/v0.6.2")]
#[macro_use(to_sql_checked)]
extern crate postgres;
extern crate byteorder;
#[doc(inline)]
pub use array::Array;
pub mod array;
mod impls;
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct Dimension {
pub len: usize,
pub lower_bound: isize,
}
impl Dimension {
fn shift(&self, idx: isize) -> usize {
let offset = self.lower_bound;
assert!(idx >= offset, "out of bounds array access");
assert!(offset >= 0 || idx <= 0 || usize::max_value() - (-offset) as usize >= idx as usize,
"out of bounds array access");
let shifted = idx.wrapping_sub(offset) as usize;
assert!(shifted < self.len, "out of bounds array access");
shifted
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_from_vec() {
let a = Array::from_vec(vec![0i32, 1, 2], -1);
assert!(&[Dimension {
len: 3,
lower_bound: -1,
}][..] == a.dimensions());
assert_eq!(0, a[-1]);
assert_eq!(1, a[0]);
assert_eq!(2, a[1]);
}
#[test]
fn test_2d_slice_get() {
let mut a = Array::from_vec(vec![0i32, 1, 2], -1);
a.wrap(1);
assert_eq!(0, a[(1, -1)]);
assert_eq!(1, a[(1, 0)]);
assert_eq!(2, a[(1, 1)]);
}
#[test]
#[should_panic]
fn test_push_wrong_lower_bound() {
let mut a = Array::from_vec(vec![1i32], -1);
a.push(Array::from_vec(vec![2], 0));
}
#[test]
#[should_panic]
fn test_push_wrong_dims() {
let mut a = Array::from_vec(vec![1i32], -1);
a.wrap(1);
a.push(Array::from_vec(vec![1, 2], -1));
}
#[test]
#[should_panic]
fn test_push_wrong_dim_count() {
let mut a = Array::from_vec(vec![1i32], -1);
a.wrap(1);
let mut b = Array::from_vec(vec![2], -1);
b.wrap(1);
a.push(b);
}
#[test]
fn test_push_ok() {
let mut a = Array::from_vec(vec![1i32, 2], 0);
a.wrap(0);
a.push(Array::from_vec(vec![3, 4], 0));
assert_eq!(1, a[(0, 0)]);
assert_eq!(2, a[(0, 1)]);
assert_eq!(3, a[(1, 0)]);
assert_eq!(4, a[(1, 1)]);
}
#[test]
fn test_3d() {
let mut a = Array::from_vec(vec![0i32, 1], 0);
a.wrap(0);
a.push(Array::from_vec(vec![2, 3], 0));
a.wrap(0);
let mut b = Array::from_vec(vec![4, 5], 0);
b.wrap(0);
b.push(Array::from_vec(vec![6, 7], 0));
a.push(b);
assert_eq!(0, a[(0, 0, 0)]);
assert_eq!(1, a[(0, 0, 1)]);
assert_eq!(2, a[(0, 1, 0)]);
assert_eq!(3, a[(0, 1, 1)]);
assert_eq!(4, a[(1, 0, 0)]);
assert_eq!(5, a[(1, 0, 1)]);
assert_eq!(6, a[(1, 1, 0)]);
assert_eq!(7, a[(1, 1, 1)]);
}
#[test]
fn test_mut() {
let mut a = Array::from_vec(vec![1i32, 2], 0);
a.wrap(0);
a[(0, 0)] = 3;
assert_eq!(3, a[(0, 0)]);
}
#[test]
fn test_display() {
let a = Array::from_vec(vec![0i32, 1, 2, 3, 4], 1);
assert_eq!("{0,1,2,3,4}", &format!("{}", a));
let a = Array::from_vec(vec![0i32, 1, 2, 3, 4], -3);
assert_eq!("[-3:1]={0,1,2,3,4}", &format!("{}", a));
let mut a = Array::from_vec(vec![1i32, 2, 3], 3);
a.wrap(-2);
a.push(Array::from_vec(vec![4, 5, 6], 3));
a.wrap(1);
assert_eq!("[1:1][-2:-1][3:5]={{{1,2,3},{4,5,6}}}", &format!("{}", a));
}
}