#!/usr/bin/env swift;
/******************************************************************************
 * This program reads bytes from a file and prints them in decimal format.
 * 
 * Copyright © 2021 Richard Lesh.  All rights reserved.
 *****************************************************************************/

import Foundation
import Utils

func readBinaryFile(_ filespec:String) throws -> Void {
	let ifh:FileHandle? = FileHandle(forReadingAtPath: filespec)
	if ifh == nil {
		throw RuntimeError("Problem opening input file!")
	}
	var c:UInt8?
	var count:Int = 0
	c = Utils.getbyte(ifh!)
	while c != nil {
		print(String(c!) + " ", terminator: "")
		count += 1
		if count % 20 == 0 {
			print()
		}
		c = Utils.getbyte(ifh!)
	}
	if count % 20 != 0 {
		print()
	}
	try ifh!.close()
}

// Begin Main
if CommandLine.arguments.count != 2 {
	print("Syntax: " + CommandLine.arguments[0] + " {filename}")
	exit(1)
}
var filespec:String = CommandLine.arguments[1]
do {
	try readBinaryFile(filespec)
} catch let ex as RuntimeError {
	print("Error: " + ex.localizedDescription)
}

exit(EXIT_SUCCESS)