rs.RSCoder failed if n = 255 and k = 255

[anujkgarg]

coder = rs.RSCoder(255, 255)
code = coder.encode(data, False, None, True)

If codeword and message length are 255, it is failing with error -

Codeword length n must be greater than message length k

[anujkgarg]

It fails when k = n. I have tried it with k = n = 50 also.

[JoelStienlet]

I think this is inherent to the math of Reed Solomon codes.
From the main description "k is the length of the message, must be less than n".
Less than strictly, not less or equal.
Also on wikipedia: https://en.wikipedia.org/wiki/Reed%E2%80%93Solomon_error_correction#Constructions

[anujkgarg]

ok, thanks

[lrq3000]

Hello, yes indeed that's why it fails, but the encoder class could still check this potential error and raise a more meaningful exception when this case is detected, I reopen the issue until I get some time to add this, thanks for reporting the issue and thank you @JoelStienlet for answering :-)