usc/myfile/
mod.rs

1use std::io::{Read, Seek, SeekFrom, Write};
2use crate::myerror::MyError;
3use std::path::Path;
4
5
6
7
8pub fn file_read(path:&str)->Result<String,MyError>{
9    let mut file = std::fs::File::open(path)?;
10    let mut contents = String::new();
11    file.read_to_string(&mut contents)?;
12    Ok(contents)
13}
14pub fn file_write(path:&str,content:&str)-> Result<usize,MyError> {
15    let mut file=std::fs::OpenOptions::new().create(true).append(false).write(true).truncate(true).open(path)?;
16    let bytes=content.as_bytes();
17    file.write_all(bytes)?;
18    file.write_all("\n".as_bytes());
19    Ok(bytes.len())
20}
21
22pub fn file_read_string(path:&str)->String{
23    let  fileresult=file_read(path);
24    fileresult.is_err() && return String::new();
25    fileresult.unwrap()
26}
27pub fn file_read_bytes(path:&str)->Result<Vec<u8>,MyError>{
28    let mut file = std::fs::File::open(path)?;
29    let mut bytes= vec![];
30    file.seek(SeekFrom::Start(0));
31    file.read_to_end(&mut bytes);
32    Ok(bytes)
33}
34
35pub fn file_write_bytes(path:&str,bytes:&[u8])-> Result<usize,MyError> {
36
37    let target_path = Path::new(path);
38    let mut file:std::fs::File;
39    if !target_path.exists(){
40        file = std::fs::File::create(path)?;
41    } else{
42        file = std::fs::File::open(path)?;
43    }
44
45    file.write_all(bytes)?;
46    Ok(bytes.len())
47}
48
49pub fn file_append(path:&str,content:&str)-> Result<usize,MyError> {
50    let mut file=std::fs::OpenOptions::new().create(true).write(true).append(true).open(path)?;
51    let bytes=content.as_bytes();
52    file.write_all(bytes)?;
53    file.write_all("\n".as_bytes());
54    Ok(bytes.len())
55}
usc/myfile/mod.rs

usc/myfile/
mod.rs
