ntex-bytes 1.10.0

Types and traits for working with bytes (bytes crate fork)
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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229

#![deny(warnings, rust_2018_idioms)]
#![allow(clippy::unnecessary_mut_passed)]

use ntex_bytes::{Buf, BufMut, Bytes, BytesMut};

#[test]
fn test_fresh_cursor_vec() {
    let mut buf = &b"hello"[..];

    assert_eq!(buf.remaining(), 5);
    assert_eq!(buf.chunk(), b"hello");

    buf.advance(2);

    assert_eq!(buf.remaining(), 3);
    assert_eq!(buf.chunk(), b"llo");

    buf.advance(3);

    assert_eq!(buf.remaining(), 0);
    assert_eq!(buf.chunk(), b"");
}

#[test]
fn test_bytes() {
    let mut buf = Bytes::from(b"hello");

    assert_eq!(bytes::buf::Buf::remaining(&buf), 5);
    assert_eq!(bytes::buf::Buf::chunk(&buf), b"hello");

    bytes::buf::Buf::advance(&mut buf, 2);

    assert_eq!(bytes::buf::Buf::remaining(&buf), 3);
    assert_eq!(bytes::buf::Buf::chunk(&buf), b"llo");

    bytes::buf::Buf::advance(&mut buf, 3);

    assert_eq!(bytes::buf::Buf::remaining(&buf), 0);
    assert_eq!(bytes::buf::Buf::chunk(&buf), b"");
}

#[test]
fn test_bytes_mut() {
    let mut buf = BytesMut::with_capacity(30);
    buf.extend_from_slice(b"hello");
    assert_eq!(Buf::remaining(&buf), 5);
    assert_eq!(Buf::chunk(&buf), b"hello");

    assert_eq!(BufMut::remaining_mut(&mut buf), 25);
    Buf::advance(&mut buf, 2);

    assert_eq!(Buf::remaining(&buf), 3);
    assert_eq!(Buf::chunk(&buf), b"llo");

    Buf::advance(&mut buf, 3);

    assert_eq!(Buf::remaining(&buf), 0);
    assert_eq!(Buf::chunk(&buf), b"");
}

#[test]
fn test_bytes_mut_buf() {
    let mut buf = BytesMut::with_capacity(30);
    buf.extend_from_slice(b"hello");

    assert_eq!(bytes::buf::Buf::remaining(&buf), 5);
    assert_eq!(bytes::buf::Buf::chunk(&buf), b"hello");

    assert_eq!(bytes::buf::BufMut::remaining_mut(&mut buf), usize::MAX - 5);
    bytes::buf::Buf::advance(&mut buf, 2);

    assert_eq!(bytes::buf::Buf::remaining(&buf), 3);
    assert_eq!(bytes::buf::Buf::chunk(&buf), b"llo");

    bytes::buf::Buf::advance(&mut buf, 3);

    assert_eq!(bytes::buf::Buf::remaining(&buf), 0);
    assert_eq!(bytes::buf::Buf::chunk(&buf), b"");

    bytes::buf::BufMut::put_slice(&mut buf, b"12");
    bytes::buf::BufMut::put_u8(&mut buf, b'3');
    bytes::buf::BufMut::put_i8(&mut buf, b'4' as i8);
    unsafe {
        let c = bytes::buf::BufMut::chunk_mut(&mut buf);
        *c.as_mut_ptr() = b'5';
        assert!(c.as_mut_ptr().as_ref().unwrap() == &b'5');
        bytes::buf::BufMut::advance_mut(&mut buf, 1);
    }
    assert_eq!(&bytes::buf::Buf::chunk(&buf), b"12345");
}

#[test]
fn test_bytes_vec() {
    let mut buf = BytesMut::from(b"hello");
    assert_eq!(Buf::remaining(&buf), 5);
    assert_eq!(Buf::chunk(&buf), b"hello");

    assert_eq!(BufMut::remaining_mut(&mut buf), 0);
    Buf::advance(&mut buf, 2);

    assert_eq!(Buf::remaining(&buf), 3);
    assert_eq!(Buf::chunk(&buf), b"llo");

    Buf::advance(&mut buf, 3);

    assert_eq!(Buf::remaining(&buf), 0);
    assert_eq!(Buf::chunk(&buf), b"");
}

#[test]
fn test_bytes_vec_buf() {
    let mut buf = BytesMut::from(b"hello");

    assert_eq!(bytes::buf::Buf::remaining(&buf), 5);
    assert_eq!(bytes::buf::Buf::chunk(&buf), b"hello");

    assert_eq!(bytes::buf::BufMut::remaining_mut(&mut buf), usize::MAX - 5);
    bytes::buf::Buf::advance(&mut buf, 2);

    assert_eq!(bytes::buf::Buf::remaining(&buf), 3);
    assert_eq!(bytes::buf::Buf::chunk(&buf), b"llo");

    bytes::buf::Buf::advance(&mut buf, 3);

    assert_eq!(bytes::buf::Buf::remaining(&buf), 0);
    assert_eq!(bytes::buf::Buf::chunk(&buf), b"");

    bytes::buf::BufMut::put_slice(&mut buf, b"12");
    bytes::buf::BufMut::put_u8(&mut buf, b'3');
    bytes::buf::BufMut::put_i8(&mut buf, b'4' as i8);
    unsafe {
        let c = bytes::buf::BufMut::chunk_mut(&mut buf);
        *c.as_mut_ptr() = b'5';
        assert!(c.as_mut_ptr().as_ref().unwrap() == &b'5');
        bytes::buf::BufMut::advance_mut(&mut buf, 1);
    }
    assert_eq!(&bytes::buf::Buf::chunk(&buf), b"12345");
}

/// Encoders written for the `bytes` crate, such as prost, check
/// `remaining_mut()` up front and expect a growable buffer.
#[test]
fn test_bytes_mut_buf_grows() {
    fn encode(buf: &mut impl bytes::buf::BufMut, data: &[u8]) -> Result<(), ()> {
        if buf.remaining_mut() < data.len() {
            return Err(());
        }
        buf.put_slice(data);
        Ok(())
    }

    let mut buf = BytesMut::from(b"x");
    encode(&mut buf, &[1; 100]).unwrap();
    assert_eq!(&buf[1..], &[1; 100][..]);

    // a full buffer still hands out room to write into
    let mut buf = BytesMut::from(b"hello");
    assert!(bytes::buf::BufMut::chunk_mut(&mut buf).len() > 0);
    let mut w = bytes::buf::BufMut::writer(buf);
    std::io::Write::write_all(&mut w, b" world").unwrap();
    assert_eq!(w.into_inner(), b"hello world"[..]);

    let mut buf = BytesMut::from(b"a");
    bytes::buf::BufMut::put(&mut buf, &[2u8; 100][..]);
    bytes::buf::BufMut::put(&mut buf, bytes::Buf::chain(&b"bc"[..], &b"de"[..]));
    bytes::buf::BufMut::put_bytes(&mut buf, 3, 50);
    assert_eq!(buf.len(), 1 + 100 + 4 + 50);
    assert_eq!(&buf[..1], b"a");
    assert_eq!(&buf[1..101], &[2; 100][..]);
    assert_eq!(&buf[101..105], b"bcde");
    assert_eq!(&buf[105..], &[3; 50][..]);
}

#[test]
#[should_panic(expected = "cannot advance past `remaining_mut`")]
fn test_bytes_mut_buf_advance_past_capacity() {
    let mut buf = BytesMut::with_capacity(8);
    let cap = buf.capacity();
    unsafe { bytes::buf::BufMut::advance_mut(&mut buf, cap + 1) };
}

#[test]
fn test_get_u8() {
    let mut buf = &b"\x21zomg"[..];
    assert_eq!(0x21, buf.get_u8());
}

#[test]
fn test_get_u16() {
    let mut buf = &b"\x21\x54zomg"[..];
    assert_eq!(0x2154, buf.get_u16());
    let mut buf = &b"\x21\x54zomg"[..];
    assert_eq!(0x5421, buf.get_u16_le());
}

#[test]
fn test_get_int_sign_extends() {
    let mut buf = &b"\xff\xfe\x80\x7f"[..];
    assert_eq!(-2, buf.get_int(2));
    assert_eq!(-128, buf.get_int(1));
    assert_eq!(127, buf.get_int(1));

    let mut buf = &b"\xfe\xff\x00\x80"[..];
    assert_eq!(-2, buf.get_int_le(2));
    assert_eq!(-32768, buf.get_int_le(2));

    assert_eq!(0, (&b""[..]).get_int(0));

    for n in [i64::MIN, -65536, -2, -1, 0, 1, 255, i64::MAX] {
        for nbytes in 1..=8 {
            let shift = (8 - nbytes) * 8;
            let expected = (n << shift) >> shift;

            let mut buf = BytesMut::new();
            buf.put_int(n, nbytes);
            buf.put_int_le(n, nbytes);
            assert_eq!(expected, buf.get_int(nbytes), "{n} {nbytes}");
            assert_eq!(expected, buf.get_int_le(nbytes), "{n} {nbytes}");
        }
    }
}

#[cfg(not(target_os = "macos"))]
#[test]
#[should_panic]
fn test_get_u16_buffer_underflow() {
    let mut buf = &b"\x21"[..];
    buf.get_u16();
}