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https://github.com/sile/hls_m3u8.git
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62 lines
1.7 KiB
Rust
62 lines
1.7 KiB
Rust
use crate::types::ProtocolVersion;
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use crate::{Error, ErrorKind, Result};
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use std::fmt;
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use std::str::FromStr;
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/// [4.3.1.2. EXT-X-VERSION]
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///
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/// [4.3.1.2. EXT-X-VERSION]: https://tools.ietf.org/html/rfc8216#section-4.3.1.2
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#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)]
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pub struct ExtXVersion {
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version: ProtocolVersion,
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}
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impl ExtXVersion {
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pub(crate) const PREFIX: &'static str = "#EXT-X-VERSION:";
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/// Makes a new `ExtXVersion` tag.
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pub const fn new(version: ProtocolVersion) -> Self {
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ExtXVersion { version }
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}
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/// Returns the protocol compatibility version of the playlist containing this tag.
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pub const fn version(&self) -> ProtocolVersion {
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self.version
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}
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/// Returns the protocol compatibility version that this tag requires.
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pub const fn requires_version(&self) -> ProtocolVersion {
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ProtocolVersion::V1
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}
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}
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impl fmt::Display for ExtXVersion {
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fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
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write!(f, "{}{}", Self::PREFIX, self.version)
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}
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}
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impl FromStr for ExtXVersion {
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type Err = Error;
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fn from_str(s: &str) -> Result<Self> {
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track_assert!(s.starts_with(Self::PREFIX), ErrorKind::InvalidInput);
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let suffix = s.split_at(Self::PREFIX.len()).1;
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let version = track!(suffix.parse())?;
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Ok(ExtXVersion { version })
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}
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}
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#[cfg(test)]
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mod test {
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use super::*;
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#[test]
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fn ext_x_version() {
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let tag = ExtXVersion::new(ProtocolVersion::V6);
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assert_eq!("#EXT-X-VERSION:6".parse().ok(), Some(tag));
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assert_eq!(tag.to_string(), "#EXT-X-VERSION:6");
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assert_eq!(tag.version(), ProtocolVersion::V6);
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assert_eq!(tag.requires_version(), ProtocolVersion::V1);
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}
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}
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