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
use std::iter::{FromIterator, IntoIterator};
use std::marker::PhantomData;
use super::{ffi, Bitmap};
pub struct BitmapIterator<'a> {
iterator: *mut ffi::roaring_uint32_iterator_s,
phantom: PhantomData<&'a ()>,
}
impl<'a> BitmapIterator<'a> {
fn new(bitmap: &Bitmap) -> Self {
BitmapIterator {
iterator: unsafe { ffi::roaring_create_iterator(bitmap.bitmap) },
phantom: PhantomData,
}
}
#[inline]
fn current_value(&self) -> Option<u32> {
unsafe {
if self.has_value() {
Some((*self.iterator).current_value)
} else {
None
}
}
}
#[inline]
fn has_value(&self) -> bool {
unsafe { (*self.iterator).has_value }
}
#[inline]
fn advance(&mut self) -> bool {
unsafe { ffi::roaring_advance_uint32_iterator(self.iterator) }
}
}
impl<'a> Iterator for BitmapIterator<'a> {
type Item = u32;
fn next(&mut self) -> Option<Self::Item> {
match self.current_value() {
Some(value) => {
self.advance();
Some(value)
}
None => None,
}
}
}
impl<'a> Drop for BitmapIterator<'a> {
fn drop(&mut self) {
unsafe { ffi::roaring_free_uint32_iterator(self.iterator) }
}
}
impl Bitmap {
pub fn iter(&self) -> BitmapIterator {
BitmapIterator::new(self)
}
}
impl FromIterator<u32> for Bitmap {
fn from_iter<I: IntoIterator<Item = u32>>(iter: I) -> Self {
Bitmap::of(&Vec::from_iter(iter))
}
}