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catch invalid encoding parameters

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This commit is contained in:
Sebastian Gesemann
2015-01-29 17:41:58 +01:00
parent d7da24cfdd
commit 7e883bf11c
1 changed files with 8 additions and 3 deletions
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11
src/main.rs
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@ -205,8 +205,9 @@ fn main() {
let mut opts = Options::new();
opts.optflag("h", "help", "print this help text");
opts.optflag("d", "decode", "for decoding");
opts.optopt("e", "encode", "for encoding, K is the required number of shares, \
N is the number of shares to generate. 1 <= K <= N <= 255", "K,N");
opts.optopt("e", "encode", "for encoding, K is the required number of \
shares for decoding, N is the number of shares \
to generate. 1 <= K <= N <= 255", "K,N");
let opt_matches = match opts.parse(args.tail()) {
Ok(m) => m,
Err(f) => panic!(f.to_string())
@ -229,7 +230,11 @@ fn main() {
(true, false) => {
if let Some(param) = opt_matches.opt_str("e") {
if let Some((k,n)) = parse_k_n(&*param) {
Ok(Action::Encode(k,n))
if 0 < k && k <= n {
Ok(Action::Encode(k,n))
} else {
Err("Invalid encoding parameters K,N")
}
} else {
Err("Could not parse K,N parameters")
}