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
141
142
143
144
145
146
147
148
use crate::{Pattern, PatternSearchType, Searcher};
use std::fmt;
use std::iter::Iterator;
use std::ops;
pub struct PatternSearchResultIterator<'a, I, T> {
iter: I,
searcher: Searcher<'a, T>,
}
impl<'a, I, T> PatternSearchResultIterator<'a, I, T>
where
I: Iterator,
T: From<u8>
+ fmt::Binary
+ num::PrimInt
+ num::Unsigned
+ Default
+ ops::ShlAssign<u32>
+ PartialEq
+ num::PrimInt<FromStrRadixErr = std::num::ParseIntError>
+ ops::BitOrAssign
+ ops::BitAndAssign,
{
pub fn new(iter: I, pattern: &'a Pattern<T>) -> Self {
Self {
iter,
searcher: Searcher::new(pattern),
}
}
}
impl<'a, I, E, T> Iterator for PatternSearchResultIterator<'a, I, T>
where
I: Iterator<Item = Result<T, E>>,
E: std::error::Error,
T: From<u8>
+ fmt::Binary
+ num::PrimInt
+ num::Unsigned
+ Default
+ ops::ShlAssign<u32>
+ PartialEq
+ num::PrimInt<FromStrRadixErr = std::num::ParseIntError>
+ ops::BitOrAssign
+ ops::BitAndAssign,
{
type Item = Result<PatternSearchType<T>, E>;
fn next(&mut self) -> Option<Self::Item> {
if let Some(result) = self.searcher.handle_existing_data() {
return Some(Ok(result));
}
while let Some(result) = self.iter.next() {
match result {
Ok(byte) => {
if let Some(result) = self.searcher.handle_next(byte) {
return Some(Ok(result));
}
}
Err(error) => {
return Some(Err(error));
}
}
}
match self.searcher.handle_existing_data() {
Some(result) => Some(Ok(result)),
None => None,
}
}
}
pub trait PatternSearchResultExt<'a, E, T>: Iterator<Item = Result<T, E>> + Sized
where
E: std::error::Error,
T: From<u8>
+ fmt::Binary
+ num::PrimInt
+ num::Unsigned
+ Default
+ ops::ShlAssign<u32>
+ PartialEq
+ num::PrimInt<FromStrRadixErr = std::num::ParseIntError>
+ ops::BitOrAssign
+ ops::BitAndAssign,
{
fn search_pattern(self, pattern: &'a Pattern<T>) -> PatternSearchResultIterator<'a, Self, T>;
}
impl<'a, I, E, T> PatternSearchResultExt<'a, E, T> for I
where
I: Iterator<Item = Result<T, E>>,
E: std::error::Error,
T: From<u8>
+ fmt::Binary
+ num::PrimInt
+ num::Unsigned
+ Default
+ ops::ShlAssign<u32>
+ PartialEq
+ num::PrimInt<FromStrRadixErr = std::num::ParseIntError>
+ ops::BitOrAssign
+ ops::BitAndAssign,
{
fn search_pattern(self, pattern: &'a Pattern<T>) -> PatternSearchResultIterator<'a, Self, T> {
PatternSearchResultIterator::new(self, pattern)
}
}
#[cfg(test)]
mod tests {
use super::*;
use std::io::Read;
use std::str::FromStr;
#[test]
fn search_global() {
let d = [0x1a, 0x2b, 0x3c, 0x4d, 0x5e, 0x6f];
let s = Pattern::<u8>::from_str("0b???0???? 0b???1????").unwrap();
let mut iter = d.bytes().search_pattern(&s);
assert_eq!(
PatternSearchType::NonMatch(0x1a),
iter.next().unwrap().unwrap()
);
assert_eq!(
PatternSearchType::Match {
data: [0x2b, 0x3c].to_vec(),
index: 1
},
iter.next().unwrap().unwrap()
);
assert_eq!(
PatternSearchType::Match {
data: [0x4d, 0x5e].to_vec(),
index: 3
},
iter.next().unwrap().unwrap()
);
assert_eq!(
PatternSearchType::NonMatch(0x6f),
iter.next().unwrap().unwrap()
);
assert!(iter.next().is_none());
}
}