bitbytepack
Small Go module to handle composition of byte arrays with embedded values.
Usage
For instance, you could have an array of bytes where you want to embed a value over multiple bytes
command: 0x81 0x01 0x04 0x02 0x0z 0x0z 0xFF
In this case z shows the two nibbles that one 8-bit object is split out on.
In this instance, the value can be embedded in the command array with the function
bitbytepacket.WriteToArray(cmd, mask, value):
command = []byte{ 0x81, 0x01, 0x04, 0x02, 0x00, 0x00, 0xFF }
mask = []byte{ 0x00, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x00 }
value = byte(0x24)
bitbytepacket.WriteToArray(command, mask, value)
// returns []byte{ 0x81, 0x01, 0x04, 0x02, 0x02, 0x04, 0xFF }
// * *
Likewise, the value can be read of a byte array in a similar fashion:
command = []byte{ 0x81, 0x01, 0x04, 0x02, 0x02, 0x04, 0xFF }
mask = []byte{ 0x00, 0x00, 0x00, 0x00, 0x0F, 0x0F, 0x00 }
bitbytepacket.ReadFromArray(command, mask)
// returns uint(0x24)
Type overloads
The main function bitbytepacket.ReadFromArray(...) return uint, but to obtain the return
type uint8, uint16, uint32, uint64, use bitbytepacket.ReadFromArray8(...).
TODO
Extend usage manual with how to use the Mult* functions