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41 lines
972 B
41 lines
972 B
//! File structure for process
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use alloc::{string::String, sync::Arc};
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use simple_filesystem::{FileInfo, INode, Result};
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#[derive(Clone)]
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pub struct File {
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inode: Arc<INode>,
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offset: usize,
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readable: bool,
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writable: bool,
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}
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impl File {
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pub fn new(inode: Arc<INode>, readable: bool, writable: bool) -> Self {
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File { inode, offset: 0, readable, writable }
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}
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pub fn read(&mut self, buf: &mut [u8]) -> Result<usize> {
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assert!(self.readable);
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let len = self.inode.read_at(self.offset, buf)?;
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self.offset += len;
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Ok(len)
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}
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pub fn write(&mut self, buf: &[u8]) -> Result<usize> {
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assert!(self.writable);
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let len = self.inode.write_at(self.offset, buf)?;
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self.offset += len;
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Ok(len)
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}
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pub fn info(&self) -> Result<FileInfo> {
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self.inode.info()
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}
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pub fn get_entry(&self, id: usize) -> Result<String> {
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self.inode.get_entry(id)
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}
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} |