Stack-VM entrypoint

main.rs

extern crate byteorder;

mod lib;


use byteorder::{ByteOrder, LittleEndian};
use lib::vm;

use std::io::prelude::*;
use std::fs::File;


const DEFAULT_RUNTIME_STACK_SIZE: usize = 512;


fn main() {
    let argv: Vec<_> = std::env::args().collect();

    if argv.len() != 2 {
        println!("Please enter the source file...");
        println!("USAGE : stack-vm filename");
        return ();
    }

    let mut file = File::open(argv[1].clone()).unwrap();

    let mut buf = [0; 4];
    let len = file.metadata().unwrap().len();
    let mut l = 0;

    let mut program: Vec<u32> = Vec::new();

    while l < len {
        file.read_exact(&mut buf).unwrap();
        let int = LittleEndian::read_u32(&buf[..]);
        program.push(int);
        debug!(" {:?}", program);
        l += 4;
    }

    let mut vm = vm::VM::new(DEFAULT_RUNTIME_STACK_SIZE);
    vm.load_program(&program);
    vm.run();
}