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use crate::error::Result;
use std::io::prelude::*;
use std::os::unix::fs::FileExt;
use std::path::{Path, PathBuf};
use sgx_tprotected_fs::SgxFile;
pub trait RandomAccess {
fn read_at(&self, off: usize, dst: &mut [u8]) -> Result<usize>;
}
impl RandomAccess for SgxFile {
fn read_at(&self, off: usize, dst: &mut [u8]) -> Result<usize> {
Ok((self as &dyn FileExt).read_at(dst, off as u64)?)
}
}
pub struct FileLock {
pub id: String,
}
pub trait Env {
fn open_sequential_file(&self, p: &Path) -> Result<Box<dyn Read>>;
fn open_random_access_file(&self, p: &Path) -> Result<Box<dyn RandomAccess>>;
fn open_writable_file(&self, p: &Path) -> Result<Box<dyn Write>>;
fn open_appendable_file(&self, p: &Path) -> Result<Box<dyn Write>>;
fn exists(&self, p: &Path) -> Result<bool>;
fn children(&self, p: &Path) -> Result<Vec<PathBuf>>;
fn size_of(&self, p: &Path) -> Result<usize>;
fn delete(&self, p: &Path) -> Result<()>;
fn mkdir(&self, p: &Path) -> Result<()>;
fn rmdir(&self, p: &Path) -> Result<()>;
fn rename(&self, p: &Path, p: &Path) -> Result<()>;
fn lock(&self, p: &Path) -> Result<FileLock>;
fn unlock(&self, l: FileLock) -> Result<()>;
fn new_logger(&self, p: &Path) -> Result<Logger>;
fn micros(&self) -> u64;
}
pub struct Logger {
dst: Box<dyn Write>,
}
impl Logger {
pub fn new(w: Box<dyn Write>) -> Logger {
Logger { dst: w }
}
pub fn log(&mut self, message: &str) {
let _ = self.dst.write(message.as_bytes());
let _ = self.dst.write("\n".as_bytes());
}
}
pub fn path_to_string(p: &Path) -> String {
p.to_str().map(String::from).unwrap()
}
pub fn path_to_str(p: &Path) -> &str {
p.to_str().unwrap()
}