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
|
enum Operation {
OP_NULL = 0,
OP_MOVE1,
OP_MOVE2,
OP_MOVE4,
OP_MOVE8,
OP_INSERT,
OP_DELETE,
OP_SHOW
};
void encode2(int16_t data, int8_t *message, size_t offset) {
message[offset] = data & 0x00ff;
message[offset + 1] = (data & 0xff00) >> 8;
}
int16_t decode2(int8_t *message, size_t offset) {
return (int16_t)message[offset + 1] << 8 & 0xff00
| (int16_t)message[offset] & 0x00ff;
}
void encode4(int32_t data, int8_t *message, size_t offset) {
encode2( data & 0x0000ffff, message, offset);
encode2((data & 0xffff0000) >> 16, message, offset + 2);
}
int32_t decode4(int8_t *message, size_t offset) {
return (int32_t)decode2(message, offset + 2) << 16 & 0xffff0000
| (int32_t)decode2(message, offset) & 0x0000ffff;
}
void encode8(int64_t data, int8_t *message, size_t offset) {
encode4( data & 0x00000000ffffffff, message, offset);
encode4((data & 0xffffffff00000000) >> 32, message, offset + 4);
}
int64_t decode8(int8_t *message, size_t offset) {
return (int64_t)decode4(message, offset + 4) << 32 & 0xffffffff00000000
| (int64_t)decode4(message, offset) & 0x00000000ffffffff;
}
|
