Jeremy Soller
42 lines
1.1 KiB
Rust
42 lines
1.1 KiB
Rust
use std::fs::{File, OpenOptions};
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use std::io::{Error, Read, Write, Seek, SeekFrom};
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use redoxfs::Disk;
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pub struct Image {
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file: File
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}
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impl Image {
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pub fn open(path: &str) -> Result<Image, Error> {
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let file = try!(OpenOptions::new().read(true).write(true).open(path));
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Ok(Image {
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file: file
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})
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}
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pub fn create(path: &str, size: u64) -> Result<Image, Error> {
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let file = try!(OpenOptions::new().read(true).write(true).create(true).open(path));
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try!(file.set_len(size));
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Ok(Image {
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file: file
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})
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}
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}
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impl Disk<Error> for Image {
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fn read_at(&mut self, block: u64, buffer: &mut [u8]) -> Result<usize, Error> {
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try!(self.file.seek(SeekFrom::Start(block * 512)));
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self.file.read(buffer)
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}
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fn write_at(&mut self, block: u64, buffer: &[u8]) -> Result<usize, Error> {
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try!(self.file.seek(SeekFrom::Start(block * 512)));
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self.file.write(buffer)
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}
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fn size(&mut self) -> Result<u64, Error> {
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self.file.seek(SeekFrom::End(0))
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}
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}
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