blob: fca17c2d0398c3a80b8e7b86a8e50f5b3ceb107b (
plain)
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
|
import io
struct Buf {
pub:
bytes []byte
mut:
i int
}
struct Writ {
pub mut:
bytes []byte
}
fn (mut b Buf) read(mut buf []byte) ?int {
if !(b.i < b.bytes.len) {
return none
}
n := copy(buf, b.bytes[b.i..])
b.i += n
return n
}
fn (mut w Writ) write(buf []byte) ?int {
if buf.len <= 0 {
return none
}
w.bytes << buf
return buf.len
}
fn test_copy() {
src := Buf{
bytes: 'abcdefghij'.repeat(10).bytes()
}
mut dst := Writ{
bytes: []byte{}
}
io.cp(src, mut dst) or { assert false }
assert dst.bytes == src.bytes
}
|
