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use crate::mode::{AccessMode, CanRead, CanWrite};
use crate::randfile::RandFile;
use std::fs::File;
use std::io::Result;
pub struct Chunk<'a, M: AccessMode, T: 'a> {
file: RandFile<'a, M, T>,
size: usize,
offset: u64,
}
impl<'a, M: AccessMode, T> Chunk<'a, M, T> {
pub(crate) fn new(file: RandFile<'a, M, T>, offset: u64, size: usize) -> Self {
Self { file, size, offset }
}
}
impl<M: CanRead<File>> Chunk<'_, M, File> {
pub fn mmap(&self) -> Result<impl AsRef<[u8]>> {
self.file.mmap(self.offset, self.size)
}
}
impl<M: CanRead<File> + CanWrite<File>> Chunk<'_, M, File> {
pub fn mmap_mut(&mut self) -> Result<impl AsMut<[u8]>> {
self.file.mmap_mut(self.offset, self.size)
}
}