an efficient binary archive format
Bindle::read_to
+25
+25
src/lib.rs
+25
src/lib.rs
···
437
437
}
438
438
}
439
439
440
+
pub fn read_to<W: std::io::Write>(&self, name: &str, mut w: W) -> std::io::Result<()> {
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+
let entry = self
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+
.index
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+
.get(name)
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+
.ok_or_else(|| io::Error::new(io::ErrorKind::InvalidData, "Invalid entry"))?;
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+
let mmap = self
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+
.mmap
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+
.as_ref()
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+
.ok_or_else(|| io::Error::new(io::ErrorKind::InvalidData, "Missing mmap"))?;
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+
let data = mmap
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+
.get(entry.offset() as usize..(entry.offset() + entry.compressed_size()) as usize)
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+
.ok_or_else(|| io::Error::new(io::ErrorKind::InvalidData, "Invalid mmap offset"))?;
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+
453
+
if entry.compression_type == 1 {
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+
std::io::copy(
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+
&mut zstd::Decoder::new(data)
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+
.map_err(|err| io::Error::new(io::ErrorKind::Other, err))?,
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+
&mut w,
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+
)?;
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+
} else {
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+
w.write_all(&data)?;
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+
}
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+
Ok(())
463
+
}
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+
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/// The number of entries
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pub fn len(&self) -> usize {
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self.index.len()