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enum Operation {
OP_NULL = 0,
OP_MOVE1,
OP_MOVE2,
OP_MOVE4,
OP_MOVE8,
OP_INSERT,
OP_DELETE,
OP_SHOW
};
void encode2(int16_t data, uint8_t *message, size_t offset) {
message[offset] = data & 0x00ff;
message[offset + 1] = (data & 0xff00) >> 8;
}
int16_t decode2(uint8_t *message, size_t offset) {
return message[offset] | ((int16_t)message[offset + 1] << 8);
}
void encode4(int32_t data, uint8_t *message, size_t offset) {
encode2( data & 0x0000ffff, message, offset);
encode2((data & 0xffff0000) >> 16, message, offset + 2);
}
int32_t decode4(uint8_t *message, size_t offset) {
return decode2(message, offset) | ((int32_t)decode2(message, offset + 2) << 16);
}
void encode8(int64_t data, uint8_t *message, size_t offset) {
encode4( data & 0x00000000ffffffff, message, offset);
encode4((data & 0xffffffff00000000) >> 32, message, offset + 4);
}
int64_t decode8(uint8_t *message, size_t offset) {
return decode4(message, offset) | ((int64_t)decode4(message, offset + 4) << 32);
}
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