// 
// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
// 
// copyfile.cfa -- 
// 
// Author           : Peter A. Buhr
// Created On       : Fri Jun 19 13:44:05 2020
// Last Modified By : Peter A. Buhr
// Last Modified On : Sat Aug 17 14:18:47 2024
// Update Count     : 11
// 

#include <fstream.hfa>
#include <exception.hfa>

int main( int argc, char * argv[] ) {
	ifstream in  = stdin;								// copy default files
	ofstream out = stdout;

	try {
		choose ( argc ) {								// terminate if command-line errors
		  case 3, 2:
			open( in, argv[1] );						// open input file first as output creates file
			if ( argc == 3 ) open( out, argv[2] );		// do not create output unless input opens
		  case 1: ;										// use default files
		  default:										// wrong number of options
			exit | "Usage" | argv[0] | "[ input-file (default stdin) [ output-file (default stdout) ] ]";
		} // choose
	} catch( open_failure * ex ; ex->istream == &in ) {
		exit | "Unable to open input file" | argv[1];
	} catch( open_failure * ex ; ex->ostream == &out ) {
		close( in );									// optional
		exit | "Unable to open output file" | argv[2];
	} // try

	out | nlOff;										// turn off auto newline
	in  | nlOn;											// turn on reading newline

	char ch;
	try {
		for () {										// read all characters
			in | ch;
			out | ch;
		} // for
	} catch( end_of_file * ) {
	} // try
} // main