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annotate src/util/mod.rs @ 640:37d151fe000b

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Implement better defaults for Sprite, and a beginning of
author Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
date Thu, 04 Jul 2019 21:47:53 +0200
parents afa012bb8021
children 01849ffd0180
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
637
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1 //! Module containing a bunch of helper modules.
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2
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3 pub mod bitstream;
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4 pub mod lzss;
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5
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6 #[cfg(test)]
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7 use std::io;
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8
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9 #[cfg(test)]
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10 pub struct SeekableSlice<'a> {
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11 slice: &'a [u8],
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12 cursor: usize,
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13 }
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14
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15 #[cfg(test)]
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16 impl SeekableSlice<'_> {
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17 pub fn new(slice: &[u8]) -> SeekableSlice {
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18 SeekableSlice {
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19 slice,
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20 cursor: 0,
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21 }
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22 }
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23 }
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24
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25 #[cfg(test)]
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26 impl io::Read for SeekableSlice<'_> {
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27 fn read(&mut self, buf: &mut [u8]) -> io::Result<usize> {
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28 let length = (&self.slice[self.cursor..]).read(buf)?;
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29 self.cursor += length;
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30 Ok(length)
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31 }
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32 }
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33
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34 #[cfg(test)]
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35 impl io::Seek for SeekableSlice<'_> {
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36 fn seek(&mut self, seek_from: io::SeekFrom) -> io::Result<u64> {
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37 match seek_from {
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38 io::SeekFrom::Start(offset) => {
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39 self.cursor = offset as usize;
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40 }
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41 io::SeekFrom::End(offset) => {
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42 self.cursor = (self.slice.len() as i64 + offset) as usize;
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43 }
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44 io::SeekFrom::Current(offset) => {
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45 self.cursor = (self.cursor as i64 + offset) as usize;
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46 }
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47 }
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48 Ok(self.cursor as u64)
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49 }
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50 }