mirror of
https://github.com/sile/hls_m3u8.git
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104 lines
3 KiB
Rust
104 lines
3 KiB
Rust
use crate::Error;
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pub(crate) fn parse_yes_or_no<T: AsRef<str>>(s: T) -> crate::Result<bool> {
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match s.as_ref() {
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"YES" => Ok(true),
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"NO" => Ok(false),
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_ => Err(Error::invalid_input()),
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}
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}
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pub(crate) fn parse_u64<T: AsRef<str>>(s: T) -> crate::Result<u64> {
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let n = s.as_ref().parse().map_err(Error::unknown)?; // TODO: Error::number
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Ok(n)
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}
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/// According to the documentation the following characters are forbidden
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/// inside a quoted string:
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/// - carriage return (`\r`)
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/// - new line (`\n`)
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/// - double quotes (`"`)
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///
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/// Therefore it is safe to simply remove any occurence of those characters.
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/// [rfc8216#section-4.2](https://tools.ietf.org/html/rfc8216#section-4.2)
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pub(crate) fn unquote<T: ToString>(value: T) -> String {
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value
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.to_string()
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.replace("\"", "")
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.replace("\n", "")
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.replace("\r", "")
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}
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/// Puts a string inside quotes.
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pub(crate) fn quote<T: ToString>(value: T) -> String {
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// the replace is for the case, that quote is called on an already quoted string, which could
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// cause problems!
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format!("\"{}\"", value.to_string().replace("\"", ""))
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}
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/// Checks, if the given tag is at the start of the input. If this is the case, it will remove it
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/// and return the rest of the input.
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///
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/// # Error
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/// This function will return `Error::MissingTag`, if the input doesn't start with the tag, that
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/// has been passed to this function.
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pub(crate) fn tag<T>(input: &str, tag: T) -> crate::Result<&str>
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where
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T: AsRef<str>,
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{
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if !input.trim().starts_with(tag.as_ref()) {
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return Err(Error::missing_tag(tag.as_ref(), input));
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}
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let result = input.split_at(tag.as_ref().len()).1;
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Ok(result)
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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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#[test]
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fn test_parse_yes_or_no() {
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assert!(parse_yes_or_no("YES").unwrap());
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assert!(!parse_yes_or_no("NO").unwrap());
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// TODO: test for error
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}
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#[test]
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fn test_parse_u64() {
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assert_eq!(parse_u64("1").unwrap(), 1);
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assert_eq!(parse_u64("25").unwrap(), 25);
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// TODO: test for error
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}
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#[test]
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fn test_unquote() {
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assert_eq!(unquote("\"TestValue\""), "TestValue".to_string());
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assert_eq!(unquote("\"TestValue\n\""), "TestValue".to_string());
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assert_eq!(unquote("\"TestValue\n\r\""), "TestValue".to_string());
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}
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#[test]
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fn test_quote() {
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assert_eq!(quote("value"), "\"value\"".to_string());
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assert_eq!(quote("\"value\""), "\"value\"".to_string());
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}
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#[test]
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fn test_tag() {
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let input = "HelloMyFriendThisIsASampleString";
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let input = tag(input, "Hello").unwrap();
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assert_eq!(input, "MyFriendThisIsASampleString");
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let input = tag(input, "My").unwrap();
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assert_eq!(input, "FriendThisIsASampleString");
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let input = tag(input, "FriendThisIs").unwrap();
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assert_eq!(input, "ASampleString");
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let input = tag(input, "A").unwrap();
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assert_eq!(input, "SampleString");
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}
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}
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