mirror of https://github.com/dswd/zvault
41 lines
1.2 KiB
Rust
41 lines
1.2 KiB
Rust
use super::*;
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use std::cmp::min;
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pub struct FixedChunker {
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buffer: [u8; 4096],
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size: usize
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}
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impl FixedChunker {
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pub fn new(avg_size: usize) -> FixedChunker {
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FixedChunker{
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buffer: [0; 4096],
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size: avg_size,
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}
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}
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}
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impl Chunker for FixedChunker {
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#[allow(unknown_lints,explicit_counter_loop)]
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fn chunk(&mut self, r: &mut Read, mut w: &mut Write) -> Result<ChunkerStatus, ChunkerError> {
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let mut todo = self.size;
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loop {
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// Fill the buffer, there might be some bytes still in there from last chunk
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let max_read = min(todo, self.buffer.len());
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let read = try!(r.read(&mut self.buffer[..max_read]).map_err(ChunkerError::Read));
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// If nothing to do, finish
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if read == 0 {
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return Ok(ChunkerStatus::Finished)
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}
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// Write all bytes from this chunk out to sink and store rest for next chunk
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try!(w.write_all(&self.buffer[..read]).map_err(ChunkerError::Write));
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todo -= read;
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if todo == 0 {
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return Ok(ChunkerStatus::Continue)
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}
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}
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}
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}
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