rustHow to read binary file in Rust

Reading a binary file in Rust is relatively straightforward. First, you need to open the file using the std::fs::File::open method. Then, you can read the contents of the file using the std::io::Read trait. Finally, you can convert the bytes into a usable format, such as a Vec<u8> or a String. The following ## Code example shows how to read a binary file and convert it into a Vec<u8>:

use std::fs::File;
use std::io::Read;

fn main() {
    let mut file = File::open("my_file.bin").expect("Failed to open file");
    let mut contents = Vec::new();
    file.read_to_end(&mut contents).expect("Failed to read file");
}

In this example, we open the file using the File::open method, then read the contents of the file into a Vec<u8> using the read_to_end method. The expect method is used to handle any errors that may occur while opening or reading the file.

If you need to convert the bytes into a String, you can use the String::from_utf8 method. The following example shows how to convert the bytes into a String:

use std::fs::File;
use std::io::Read;

fn main() {
    let mut file = File::open("my_file.bin").expect("Failed to open file");
    let mut contents = Vec::new();
    file.read_to_end(&mut contents).expect("Failed to read file");
    let contents_string = String::from_utf8(contents).expect("Failed to convert bytes to string");
}

In this example, we use the String::from_utf8 method to convert the bytes into a String. The expect method is used to handle any errors that may occur while converting the bytes.

Helpful links

• std::fs::File
• std::io::Read
• String::from_utf8

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