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macro_rules! s { ( $x:expr ) => { String::from($x); }; }
macro_rules! ss { ($x:expr, $y:expr) => ( &*format!("{}{}", $x, $y); ) }
use std::fs::File;
use std::path::Path;
use std::io;
#[allow(unused_imports)]
use std::io::{Read, Write};
pub fn fread<P: AsRef<Path>>(path: P) -> io::Result<Vec<u8>> {
let mut file = File::open(path)?;
let meta = file.metadata()?;
let size = meta.len() as usize;
let mut data = Vec::with_capacity(size);
data.resize(size, 0);
file.read_exact(&mut data)?;
Ok(data)
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn s() {
assert_eq!(s!("Hello"), String::from("Hello"));
}
#[test]
fn ss() {
assert_eq!(ss!("Hello", ", world"), "Hello, world");
let s1 = s!("Hello");
let s2 = s!(", world");
assert_eq!(ss!(s1, s2), "Hello, world");
}
#[test]
fn fread_test() {
let data = fread("README.md").unwrap();
assert!(data.len() > 100);
}
}