source: tests/copyfile.cfa@ 4be0117

// 
// 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