All files / src/utils leb128.js

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
 
24x
867x
867x
1080x
1080x
1080x
 
1080x
867x
867x
 
213x
 
 
867x
 
 
24x
6298x
6298x
6345x
6345x
6345x
6298x
6298x
 
 
47x
 
 
6298x
 
 
// @flow
export const encodeSigned = (value: number) => {
  const encoding = [];
  while (true) {
    const byte = value & 127;
    value = value >> 7;
    const signbit = byte & 0x40;
 
    if ((value === 0 && !signbit) || (value === -1 && signbit)) {
      encoding.push(byte);
      break;
    } else {
      encoding.push(byte | 0x80);
    }
  }
  return encoding;
};
 
export const encodeUnsigned = (value: number) => {
  const encoding = [];
  while (true) {
    const i = value & 127;
    value = value >>> 7;
    if (value === 0) {
      encoding.push(i);
      break;
    }
 
    encoding.push(i | 0x80);
  }
 
  return encoding;
};