stuffr_core/source/
file.rs

1use std::fs::File;
2use std::io::Read;
3use std::path::Path;
4
5use super::{SeekRead, Source, SourceCaps};
6use crate::error::Result;
7
8/// A seekable source backed by a real file. The Exact rung.
9pub struct FileSource {
10    file: File,
11    len: u64,
12}
13
14impl FileSource {
15    pub fn open(path: &Path) -> Result<Self> {
16        Self::from_file(File::open(path)?)
17    }
18
19    pub fn from_file(file: File) -> Result<Self> {
20        let len = file.metadata()?.len();
21        Ok(Self { file, len })
22    }
23}
24
25impl Read for FileSource {
26    fn read(&mut self, buf: &mut [u8]) -> std::io::Result<usize> {
27        self.file.read(buf)
28    }
29}
30
31impl Source for FileSource {
32    fn caps(&self) -> SourceCaps {
33        SourceCaps {
34            seekable: true,
35            len: Some(self.len),
36        }
37    }
38
39    fn as_seek(&mut self) -> Option<&mut dyn SeekRead> {
40        Some(&mut self.file)
41    }
42}
stuffr_core/source/file.rs

stuffr_core/source/
file.rs
