nom8 0.2.0

A byte-oriented, zero-copy, parser combinators library (fork for proposals for v8)
Documentation 
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
149
150
151
152
153
154
155
156
157
158
159
160
161
162

#![cfg_attr(feature = "cargo-clippy", allow(unreadable_literal))]
#![cfg(target_pointer_width = "64")]

use nom8::bytes::take;
use nom8::input::Streaming;
#[cfg(feature = "alloc")]
use nom8::multi::{length_data, many0};
#[cfg(feature = "alloc")]
use nom8::number::be_u64;
use nom8::prelude::*;
use nom8::{Err, Needed};

// Parser definition

// We request a length that would trigger an overflow if computing consumed + requested
fn parser02(i: Streaming<&[u8]>) -> IResult<Streaming<&[u8]>, (&[u8], &[u8])> {
  (take(1_usize), take(18446744073709551615_usize)).parse(i)
}

#[test]
fn overflow_incomplete_tuple() {
  assert_eq!(
    parser02(Streaming(&b"3"[..])),
    Err(Err::Incomplete(Needed::new(18446744073709551615)))
  );
}

#[test]
#[cfg(feature = "alloc")]
fn overflow_incomplete_length_bytes() {
  fn multi(i: Streaming<&[u8]>) -> IResult<Streaming<&[u8]>, Vec<&[u8]>> {
    many0(length_data(be_u64))(i)
  }

  // Trigger an overflow in length_data
  assert_eq!(
    multi(Streaming(
      &b"\x00\x00\x00\x00\x00\x00\x00\x01\xaa\xff\xff\xff\xff\xff\xff\xff\xff"[..]
    )),
    Err(Err::Incomplete(Needed::new(18446744073709551615)))
  );
}

#[test]
#[cfg(feature = "alloc")]
fn overflow_incomplete_many0() {
  fn multi(i: Streaming<&[u8]>) -> IResult<Streaming<&[u8]>, Vec<&[u8]>> {
    many0(length_data(be_u64))(i)
  }

  // Trigger an overflow in many0
  assert_eq!(
    multi(Streaming(
      &b"\x00\x00\x00\x00\x00\x00\x00\x01\xaa\xff\xff\xff\xff\xff\xff\xff\xef"[..]
    )),
    Err(Err::Incomplete(Needed::new(18446744073709551599)))
  );
}

#[test]
#[cfg(feature = "alloc")]
fn overflow_incomplete_many1() {
  use nom8::multi::many1;

  fn multi(i: Streaming<&[u8]>) -> IResult<Streaming<&[u8]>, Vec<&[u8]>> {
    many1(length_data(be_u64))(i)
  }

  // Trigger an overflow in many1
  assert_eq!(
    multi(Streaming(
      &b"\x00\x00\x00\x00\x00\x00\x00\x01\xaa\xff\xff\xff\xff\xff\xff\xff\xef"[..]
    )),
    Err(Err::Incomplete(Needed::new(18446744073709551599)))
  );
}

#[test]
#[cfg(feature = "alloc")]
fn overflow_incomplete_many_till() {
  use nom8::{bytes::tag, multi::many_till};

  fn multi(i: Streaming<&[u8]>) -> IResult<Streaming<&[u8]>, (Vec<&[u8]>, &[u8])> {
    many_till(length_data(be_u64), tag("abc"))(i)
  }

  // Trigger an overflow in many_till
  assert_eq!(
    multi(Streaming(
      &b"\x00\x00\x00\x00\x00\x00\x00\x01\xaa\xff\xff\xff\xff\xff\xff\xff\xef"[..]
    )),
    Err(Err::Incomplete(Needed::new(18446744073709551599)))
  );
}

#[test]
#[cfg(feature = "alloc")]
fn overflow_incomplete_many_m_n() {
  use nom8::multi::many_m_n;

  fn multi(i: Streaming<&[u8]>) -> IResult<Streaming<&[u8]>, Vec<&[u8]>> {
    many_m_n(2, 4, length_data(be_u64))(i)
  }

  // Trigger an overflow in many_m_n
  assert_eq!(
    multi(Streaming(
      &b"\x00\x00\x00\x00\x00\x00\x00\x01\xaa\xff\xff\xff\xff\xff\xff\xff\xef"[..]
    )),
    Err(Err::Incomplete(Needed::new(18446744073709551599)))
  );
}

#[test]
#[cfg(feature = "alloc")]
fn overflow_incomplete_count() {
  use nom8::multi::count;

  fn counter(i: Streaming<&[u8]>) -> IResult<Streaming<&[u8]>, Vec<&[u8]>> {
    count(length_data(be_u64), 2)(i)
  }

  assert_eq!(
    counter(Streaming(
      &b"\x00\x00\x00\x00\x00\x00\x00\x01\xaa\xff\xff\xff\xff\xff\xff\xff\xef"[..]
    )),
    Err(Err::Incomplete(Needed::new(18446744073709551599)))
  );
}

#[test]
#[cfg(feature = "alloc")]
fn overflow_incomplete_length_count() {
  use nom8::multi::length_count;
  use nom8::number::be_u8;

  fn multi(i: Streaming<&[u8]>) -> IResult<Streaming<&[u8]>, Vec<&[u8]>> {
    length_count(be_u8, length_data(be_u64))(i)
  }

  assert_eq!(
    multi(Streaming(
      &b"\x04\x00\x00\x00\x00\x00\x00\x00\x01\xaa\xff\xff\xff\xff\xff\xff\xff\xee"[..]
    )),
    Err(Err::Incomplete(Needed::new(18446744073709551598)))
  );
}

#[test]
#[cfg(feature = "alloc")]
fn overflow_incomplete_length_data() {
  fn multi(i: Streaming<&[u8]>) -> IResult<Streaming<&[u8]>, Vec<&[u8]>> {
    many0(length_data(be_u64))(i)
  }

  assert_eq!(
    multi(Streaming(
      &b"\x00\x00\x00\x00\x00\x00\x00\x01\xaa\xff\xff\xff\xff\xff\xff\xff\xff"[..]
    )),
    Err(Err::Incomplete(Needed::new(18446744073709551615)))
  );
}