Make sure you have libfec-dev or equivalent installed. If your OS does not
have this as package, check out out KA9Q's
site
Also make sure you have cmake.
Then:
mkdir build; cd build
cmake ..
make
Then try:
./rscmd --help
This command will allow you to encode and decode messages using all Reed-Solomon configurations, as long as the symbol size is 8 bits.
A sample run:
$ ./rscmd "bert hubert"
nroots: 32
prim: 11
fcr: 121
poly: 1 + x + x^2 + x^7 + x^8
polyval: 0x187
(N,K) = (255,223)
The 32 parity bytes for "bert hubert": ddaa8fd46499675b712186a0da1dd8738bee3df7f25b49c2c0e84e4a8fe8137b
This runs the command with the most bog standard Reed-Solomon settings, and creates 32 parity bytes for the string "bert hubert".
To test if it worked, let us corrupt this string a bit (or arguably fix it):
$ ./rscmd "nerd hubert" ddaa8fd46499675b712186a0da1dd8738bee3df7f25b49c2c0e84e4a8fe8137b
nroots: 32
prim: 11
fcr: 121
poly: 1 + x + x^2 + x^7 + x^8
polyval: 0x187
(N,K) = (255,223)
Fixed 2 corruptions in positions: 0 3
Recovered: bert hubert
If you are unsure about your chosen parameters, try --exercise somestring.
This will do 10000 encode/decode cycles, where each time the message is
mangled as much as possible while staying within what should be recoverable.