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codec: fix codec description potential null ptr issue

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Codecs may not have .long_name initialized.

Issue raised by Pilyushkin in #34.
This commit is contained in:
Zhiming Wang 2020-10-04 11:37:59 +08:00
parent ae06272af1
commit 6f0a14ee8b
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GPG Key ID: 5B58F95EC95965D8
1 changed files with 8 additions and 1 deletions
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9
src/codec/codec.rs
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@ -41,7 +41,14 @@ impl Codec {
}
pub fn description(&self) -> &str {
unsafe { from_utf8_unchecked(CStr::from_ptr((*self.as_ptr()).long_name).to_bytes()) }
unsafe {
let long_name = (*self.as_ptr()).long_name;
if long_name.is_null() {
""
} else {
from_utf8_unchecked(CStr::from_ptr(long_name).to_bytes())
}
}
}
pub fn medium(&self) -> media::Type {