pub fn write_to(out: impl Write) -> Result<(), Error>
Expand description

Serialize the sparse index extension to out

Examples found in repository?
src/write.rs (line 106)
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    fn write_extensions<T>(
        &self,
        mut write: CountBytes<T>,
        offset_to_extensions: u32,
        extensions: Extensions,
    ) -> std::io::Result<(Vec<(extension::Signature, u32)>, T)>
    where
        T: std::io::Write,
    {
        type WriteExtFn<'a> = &'a dyn Fn(&mut dyn std::io::Write) -> Option<std::io::Result<extension::Signature>>;
        let extensions: &[WriteExtFn<'_>] = &[
            &|write| {
                extensions
                    .should_write(extension::tree::SIGNATURE)
                    .and_then(|signature| self.tree().map(|tree| tree.write_to(write).map(|_| signature)))
            },
            &|write| {
                self.is_sparse()
                    .then(|| extension::sparse::write_to(write).map(|_| extension::sparse::SIGNATURE))
            },
        ];

        let mut offset_to_previous_ext = offset_to_extensions;
        let mut out = Vec::with_capacity(5);
        for write_ext in extensions {
            if let Some(signature) = write_ext(&mut write).transpose()? {
                let offset_past_ext = write.count;
                let ext_size = offset_past_ext - offset_to_previous_ext - (extension::MIN_SIZE as u32);
                offset_to_previous_ext = offset_past_ext;
                out.push((signature, ext_size));
            }
        }
        Ok((out, write.inner))
    }