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fix position tracking with string reading

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This commit is contained in:
Robin Appelman 2019-02-23 18:50:42 +01:00
commit dcaba5b98e
1 changed files with 6 additions and 6 deletions
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12
src/stream.rs
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@ -230,22 +230,22 @@ impl<'a, E, S> BitStream<'a, E, S>
/// let mut stream = BitStream::new(&buffer, None, None);
/// // Fixed length string
/// stream.set_pos(0);
/// assert_eq!(stream.read_string(Some(13)).unwrap(), "Hello world".to_owned());
/// assert_eq!(13, stream.pos());
/// assert_eq!(stream.read_string(Some(11)).unwrap(), "Hello world".to_owned());
/// assert_eq!(11 * 8, stream.pos());
/// // fixed length with null padding
/// stream.set_pos(0);
/// assert_eq!(stream.read_string(Some(16)).unwrap(), "Hello world".to_owned());
/// assert_eq!(16, stream.pos());
/// assert_eq!(16 * 8, stream.pos());
/// // null terminated
/// stream.set_pos(0);
/// assert_eq!(stream.read_string(None).unwrap(), "Hello world".to_owned());
/// assert_eq!(12, stream.pos()); // 1 more for the terminating null byte
/// assert_eq!(12 * 8, stream.pos()); // 1 more for the terminating null byte
/// ```
pub fn read_string(&mut self, byte_len: Option<usize>) -> Result<String> {
let result = self.buffer.read_string(self.pos, byte_len)?;
let read = match byte_len {
Some(len) => len,
None => result.len() + 1
Some(len) => len * 8,
None => (result.len() + 1) * 8
};
self.pos += read;
Ok(result)