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
|
//! Minecraft calls it a "friendly byte buffer".
use byteorder::{BigEndian, WriteBytesExt};
// use std::io::Write;
const MAX_VARINT_SIZE: u32 = 5;
const MAX_VARLONG_SIZE: u32 = 10;
const DEFAULT_NBT_QUOTA: u32 = 2097152;
const MAX_STRING_LENGTH: u16 = 32767;
const MAX_COMPONENT_STRING_LENGTH: u32 = 262144;
pub struct FriendlyByteBuf<'a> {
source: &'a mut Vec<u8>,
}
impl FriendlyByteBuf<'_> {
pub fn write_byte(&mut self, n: u8) {
self.source.write_u8(n).unwrap();
println!("write_byte: {}", n);
}
pub fn write_bytes(&mut self, bytes: &[u8]) {
self.source.extend_from_slice(bytes);
}
pub fn write_varint(&mut self, mut n: u32) {
loop {
if (n & 0xFFFFFF80) == 0 {
self.write_byte(n as u8);
return ();
}
self.write_byte((n & 0x7F | 0x80) as u8);
n >>= 7;
}
}
pub fn write_utf_with_len(&mut self, string: &String, len: usize) {
if string.len() > len {
panic!(
"String too big (was {} bytes encoded, max {})",
string.len(),
len
);
}
self.write_varint(string.len() as u32);
self.write_bytes(string.as_bytes());
}
pub fn write_utf(&mut self, string: &String) {
self.write_utf_with_len(string, MAX_STRING_LENGTH as usize);
}
pub fn write_short(&mut self, n: u16) {
self.source.write_u16::<BigEndian>(n).unwrap();
}
}
|
