Struct FileBuffer 

pub struct FileBuffer {
    pub inode: u64,
    pub original_size: u64,
    /* private fields */
}

Per-file write buffer backed by an unlinked temp file in the spool dir.

Fields

inode: u64

original_size: u64

Implementations

impl FileBuffer

pub fn new(inode: u64, original_size: u64, spool_dir: &Path) -> Result<Self>

Creates the backing temp file in spool_dir. The whole file being written buffers here before upload, so spool_dir must be disk-backed (see crate::spool).

pub fn write_at(&mut self, offset: i64, data: &[u8]) -> Result<u32>

Write data at offset, growing the file and zero-filling gaps as needed. Returns the number of bytes written.

pub fn read_at(&mut self, offset: i64, size: u32) -> Result<Vec<u8>>

Read up to size bytes starting at offset. Returns fewer bytes if the offset is near or past the end.

pub fn len(&self) -> u64

pub fn is_empty(&self) -> bool

pub fn is_dirty(&self) -> bool

pub fn into_file(self) -> File

Consume the buffer and return the backing file.