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
|
use std::io::{Read, Result};
#[derive(Debug, Clone, Copy, PartialEq)]
pub enum Endianness {
Big,
Little,
}
pub trait ReadExt {
fn read_u8(&mut self) -> Result<u8>;
fn read_u16_be(&mut self) -> Result<u16>;
fn read_i16(&mut self, e: Endianness) -> Result<i16>;
fn read_i16_be(&mut self) -> Result<i16>;
fn read_i16_le(&mut self) -> Result<i16>;
fn read_i32(&mut self, e: Endianness) -> Result<i32>;
fn read_i32_be(&mut self) -> Result<i32>;
fn read_i32_le(&mut self) -> Result<i32>;
fn read_u32(&mut self, e: Endianness) -> Result<u32>;
fn read_u32_be(&mut self) -> Result<u32>;
fn read_u32_le(&mut self) -> Result<u32>;
fn read_u64(&mut self, e: Endianness) -> Result<u64>;
fn read_u64_be(&mut self) -> Result<u64>;
fn read_u64_le(&mut self) -> Result<u64>;
fn read_u128_be(&mut self) -> Result<u128>;
fn read_cstr(&mut self) -> Result<String>;
}
impl<T: Read> ReadExt for T {
fn read_u8(&mut self) -> Result<u8> {
let mut buf = [0; 2];
self.read_exact(&mut buf)?;
Ok(buf[0])
}
fn read_u16_be(&mut self) -> Result<u16> {
let mut buf = [0; 2];
self.read_exact(&mut buf)?;
Ok(u16::from_be_bytes(buf))
}
fn read_i16(&mut self, e: Endianness) -> Result<i16> {
match e {
Endianness::Big => self.read_i16_be(),
Endianness::Little => self.read_i16_le(),
}
}
fn read_i16_be(&mut self) -> Result<i16> {
let mut buf = [0; 2];
self.read_exact(&mut buf)?;
Ok(i16::from_be_bytes(buf))
}
fn read_i16_le(&mut self) -> Result<i16> {
let mut buf = [0; 2];
self.read_exact(&mut buf)?;
Ok(i16::from_le_bytes(buf))
}
fn read_i32(&mut self, e: Endianness) -> Result<i32> {
match e {
Endianness::Big => self.read_i32_be(),
Endianness::Little => self.read_i32_le(),
}
}
fn read_i32_be(&mut self) -> Result<i32> {
let mut buf = [0; 4];
self.read_exact(&mut buf)?;
Ok(i32::from_be_bytes(buf))
}
fn read_i32_le(&mut self) -> Result<i32> {
let mut buf = [0; 4];
self.read_exact(&mut buf)?;
Ok(i32::from_le_bytes(buf))
}
fn read_u32(&mut self, e: Endianness) -> Result<u32> {
match e {
Endianness::Big => self.read_u32_be(),
Endianness::Little => self.read_u32_le(),
}
}
fn read_u32_be(&mut self) -> Result<u32> {
let mut buf = [0; 4];
self.read_exact(&mut buf)?;
Ok(u32::from_be_bytes(buf))
}
fn read_u32_le(&mut self) -> Result<u32> {
let mut buf = [0; 4];
self.read_exact(&mut buf)?;
Ok(u32::from_le_bytes(buf))
}
fn read_u64(&mut self, e: Endianness) -> Result<u64> {
match e {
Endianness::Big => self.read_u64_be(),
Endianness::Little => self.read_u64_le(),
}
}
fn read_u64_be(&mut self) -> Result<u64> {
let mut buf = [0; 8];
self.read_exact(&mut buf)?;
Ok(u64::from_be_bytes(buf))
}
fn read_u64_le(&mut self) -> Result<u64> {
let mut buf = [0; 8];
self.read_exact(&mut buf)?;
Ok(u64::from_le_bytes(buf))
}
fn read_u128_be(&mut self) -> Result<u128> {
let mut buf = [0; 16];
self.read_exact(&mut buf)?;
Ok(u128::from_be_bytes(buf))
}
fn read_cstr(&mut self) -> Result<String> {
let mut buf = [0; 1];
let mut s = Vec::new();
loop {
self.read_exact(&mut buf)?;
if buf[0] == 0 {
break;
}
s.push(buf[0]);
}
Ok(String::from_utf8_lossy(&s).to_string())
}
}
|
