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Merge pull request #2035 from THE-Amrit-mahto-05/fix/mkvlang-params-check

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fix mkvlang_params_check: prevent panic on multi-byte characters
This commit is contained in:
Carlos Fernandez Sanz
2026-01-18 13:07:44 -08:00
committed by GitHub
parent e7dc4d19f7 707e1f01fe
commit 74e64c0421
1 changed files with 8 additions and 46 deletions
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54
src/rust/src/parser.rs
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@@ -134,54 +134,16 @@ fn process_word_file(filename: &str, list: &mut Vec<String>) -> Result<(), std::
Ok(())
}
fn mkvlang_params_check(lang: &str) {
let mut initial = 0;
let mut _present = 0;
for (char_index, c) in lang.to_lowercase().chars().enumerate() {
if c == ',' {
_present = char_index;
if _present - initial < 3 || _present - initial > 6 {
fatal!(
cause = ExitCause::MalformedParameter;
"language codes should be xxx,xxx,xxx,....\n"
);
}
if _present - initial == 6 {
let sub_slice = &lang[initial.._present];
if !sub_slice.contains('-') {
fatal!(
cause = ExitCause::MalformedParameter;
"language codes should be xxx,xxx,xxx,....\n"
);
}
}
initial = _present + 1;
for part in lang.split(',') {
let count = part.chars().count();
if !(3..=6).contains(&count) {
fatal!(
cause = ExitCause::MalformedParameter;
"language codes should be xxx,xxx,xxx,....\n"
);
}
}
// Steps to check for the last lang of multiple mkvlangs provided by the user.
_present = lang.len() - 1;
for char_index in (0.._present).rev() {
if lang.chars().nth(char_index) == Some(',') {
initial = char_index + 1;
break;
}
}
if _present - initial < 2 || _present - initial > 5 {
fatal!(
cause = ExitCause::MalformedParameter;
"last language code should be xxx.\n"
);
}
if _present - initial == 5 {
let sub_slice = &lang[initial.._present];
if !sub_slice.contains('-') {
if count == 6 && !part.contains('-') {
fatal!(
cause = ExitCause::MalformedParameter;
"last language code is not of the form xxx-xx\n"