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https://github.com/sile/hls_m3u8.git
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some minor fixes
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parent
7a63c2dcf2
commit
cc48478b05
2 changed files with 32 additions and 22 deletions
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@ -107,6 +107,13 @@ impl Error {
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})
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}
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pub(crate) fn missing_field<T: fmt::Display, D: fmt::Display>(strct: D, field: T) -> Self {
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Self::new(ErrorKind::Custom(format!(
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"the field `{}` is missing for `{}`",
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field, strct
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)))
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}
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pub(crate) fn unexpected_attribute<T: ToString>(value: T) -> Self {
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Self::new(ErrorKind::UnexpectedAttribute {
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attribute: value.to_string(),
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@ -39,40 +39,23 @@ pub trait Decryptable: private::Sealed {
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/// Most of the time only a single key is provided, so instead of iterating
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/// through all keys, one might as well just get the first key.
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#[must_use]
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#[inline]
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fn first_key(&self) -> Option<&DecryptionKey> {
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<Self as Decryptable>::keys(self).first().copied()
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}
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/// Returns the number of keys.
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#[must_use]
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#[inline]
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fn len(&self) -> usize { <Self as Decryptable>::keys(self).len() }
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/// Returns `true`, if the number of keys is zero.
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#[must_use]
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#[inline]
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fn is_empty(&self) -> bool { <Self as Decryptable>::len(self) == 0 }
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}
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/// # Example
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///
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/// Implementing it:
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///
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/// ```
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/// # use hls_m3u8::RequiredVersion;
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/// use hls_m3u8::types::ProtocolVersion;
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///
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/// struct ExampleTag(u64);
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///
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/// impl RequiredVersion for ExampleTag {
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/// fn required_version(&self) -> ProtocolVersion {
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/// if self.0 == 5 {
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/// ProtocolVersion::V4
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/// } else {
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/// ProtocolVersion::V1
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/// }
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/// }
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/// }
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/// assert_eq!(ExampleTag(5).required_version(), ProtocolVersion::V4);
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/// assert_eq!(ExampleTag(2).required_version(), ProtocolVersion::V1);
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/// ```
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#[doc(hidden)]
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pub trait RequiredVersion {
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/// Returns the protocol compatibility version that this tag requires.
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///
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@ -80,9 +63,11 @@ pub trait RequiredVersion {
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///
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/// This is for the latest working [`ProtocolVersion`] and a client, that
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/// only supports an older version would break.
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#[must_use]
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fn required_version(&self) -> ProtocolVersion;
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/// The protocol version, in which the tag has been introduced.
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#[must_use]
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fn introduced_version(&self) -> ProtocolVersion { self.required_version() }
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}
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@ -96,6 +81,15 @@ impl<T: RequiredVersion> RequiredVersion for Vec<T> {
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}
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}
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impl<K, V: RequiredVersion> RequiredVersion for BTreeMap<K, V> {
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fn required_version(&self) -> ProtocolVersion {
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self.values()
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.map(RequiredVersion::required_version)
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.max()
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.unwrap_or_default()
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}
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}
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impl<T: RequiredVersion> RequiredVersion for Option<T> {
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fn required_version(&self) -> ProtocolVersion {
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self.iter()
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@ -105,6 +99,15 @@ impl<T: RequiredVersion> RequiredVersion for Option<T> {
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}
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}
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impl<K, V: RequiredVersion, S> RequiredVersion for HashMap<K, V, S> {
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fn required_version(&self) -> ProtocolVersion {
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self.values()
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.map(RequiredVersion::required_version)
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.max()
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.unwrap_or_default()
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}
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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