openfile/
lib.rs

1/*
2* Made by salmmanfred 2021/01/13
3* MIT license
4*/
5
6/*
7* Made by salmmanfred 2021/01/13
8* MIT license
9*/
10
11use std::fs::File;
12use std::io::{prelude::*,BufReader};
13use std::path::Path;
14use std::fs;
15
16pub fn remove_file(fnm:&str) -> std::io::Result<()> {
17    fs::remove_file(fnm)?;
18    Ok(())
19}
20
21pub fn read_file(names: &str) -> std::io::Result<String> {
22    //reads the file from names
23    let contents =  std::fs::read_to_string(names)?;
24    Ok(contents)
25
26    
27}
28
29
30
31pub fn write_file(names:&str, cont:&str) -> std::io::Result<()> {
32    // writes to a file
33    let s = "".to_string();
34    let fnm = s+&names;
35    let path = Path::new(&fnm);
36    
37
38    // Open a file in write-only mode, returns `io::Result<File>`
39    let mut file = File::create(&path)?;
40
41    // Write the `LOREM_IPSUM` string to `file`, returns `io::Result<()>`
42    file.write_all(cont.as_bytes())?;
43    
44    Ok(())
45    
46
47    
48    
49
50}
51pub fn read_file_lines(fnm:&str) -> std::io::Result<Vec<String>> {
52    // reads the file line by line
53    let x: &str = &fnm;
54    let mut errcode = "Error".to_owned();
55    errcode.push_str(x);
56    let file = File::open(x)?;
57    let buf = BufReader::new(file);
58    let buf: Vec<String> = buf.lines()
59        .map(|l| l.expect("Could not parse line"))
60        .collect();
61    Ok(buf)
62}
63
64pub fn write_file_bytes(names:&str, cont:Vec<u8>) -> std::io::Result<()> {
65    // writes to a file
66    let s = "".to_string();
67    let fnm = s+&names;
68    let path = Path::new(&fnm);
69    
70
71    // Open a file in write-only mode, returns `io::Result<File>`
72    let mut file = File::create(&path)?;
73    //use std::io::Cursor;
74
75    // Write the `LOREM_IPSUM` string to `file`, returns `io::Result<()>`
76    for x in cont{
77        file.write(&[x])?;
78    }
79    Ok(())
80
81    
82
83}
84pub fn read_file_bytes(filename: &str) -> std::io::Result<Vec<u8>> {
85    let mut f = File::open(&filename)?;
86    let metadata = fs::metadata(&filename)?;
87    let mut buffer = vec![0; metadata.len() as usize];
88    f.read(&mut buffer)?;
89
90    Ok(buffer)
91}
92
93
94pub trait AsFile{
95    fn as_file(&self, filename: &str) -> std::io::Result<()>;
96}
97impl AsFile for &[u8]{
98    fn as_file(&self, filename: &str) -> std::io::Result<()>{
99        write_file_bytes(filename, self.to_vec())?;
100        Ok(())
101    }
102}
103impl AsFile for Vec<u8>{
104    fn as_file(&self, filename: &str) -> std::io::Result<()>{
105        write_file_bytes(filename, self.to_owned())?;
106        Ok(())
107    }
108}
109impl AsFile for String{
110    fn as_file(&self, filename: &str) -> std::io::Result<()>{
111        write_file(filename, self.as_str())?;
112        Ok(())
113    }
114}
115impl AsFile for str{
116    fn as_file(&self, filename: &str) -> std::io::Result<()>{
117        write_file(filename, self)?;
118        Ok(())
119    }
120}
openfile/lib.rs

openfile/
lib.rs
