New World ROM alternative checking

gistfile1.m

//
//  main.m
//  StringsGrep
//
//  Created by Giancarlo Mariot on 18/11/2013.
//  Copyright (c) 2013 Giancarlo Mariot. All rights reserved.
//

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {

    @autoreleasepool {
        
        NSTask * task;
        task = [[NSTask alloc] init];
        [task setLaunchPath: @"/usr/bin/strings"];
        
        //strings /Users/gian/Classic/ROMs/New World ROM/1998-07-21 - Mac OS ROM 1.1.rom
        //| grep -A1 "MacOSROMFile-version"

        //@"MacROM for CHRP 1.1." // All 1.1 versions
        //@"MacROM for NewWorld." // All 1.x versions have no version definition
        //@"MacOSROMFile-version" // Following line has the version

//        /<DESCRIPTION>\n(.*)\n<\/DESCRIPTION>/
//        /MacOSROMFile-version\n(.*)/

//        NSArray * arguments = [NSArray arrayWithObjects: @"/Users/gian/Classic/ROMs/New World ROM/1998-07-21 - Mac OS ROM 1.1.rom", nil];
//        NSArray * arguments = [NSArray arrayWithObjects: @"/Users/gian/Classic/ROMs/New World ROM/1998-12-03 - Mac OS ROM 1.2.rom", nil];
        NSArray * arguments = [NSArray arrayWithObjects: @"/Users/gian/Classic/ROMs/New World ROM/1999-09-17 - Mac OS ROM 2.5.1.rom", nil];
        [task setArguments: arguments];
        
        NSPipe * pipe = [NSPipe pipe];
        [task setStandardOutput: pipe];
        
        NSFileHandle * file = [pipe fileHandleForReading];
        
        [task launch];
        
        NSData * data = [file readDataToEndOfFile];
        
        NSString * string = [[NSString alloc]
                             initWithData: data
                                 encoding: NSUTF8StringEncoding
        ];
        
        NSError * error = NULL;
        NSRegularExpression * regexDescription = [NSRegularExpression
            regularExpressionWithPattern:@"<DESCRIPTION>\n(.*)\n</DESCRIPTION>"
                                 options:0
                                   error:&error
        ];
        
        
        NSTextCheckingResult * matchDescription = [
            regexDescription firstMatchInString:string
                                        options:0
                                          range:NSMakeRange(0, [string length])
        ];

        if (matchDescription) {
            NSRange firstHalfRange = [matchDescription rangeAtIndex:1];
//            NSLog(@"Match desc:\n%@", [string substringWithRange:firstHalfRange]);
            
            if ([[string substringWithRange:firstHalfRange] isEqualToString:@"MacROM for NewWorld."]) {
                NSRegularExpression * regexVersion = [NSRegularExpression
                    regularExpressionWithPattern:@"MacOSROMFile-version\n(.*)"
                                         options:0
                                           error:&error
                ];
                
                NSTextCheckingResult * matchVersion = [
                    regexVersion firstMatchInString:string
                                            options:0
                                              range:NSMakeRange(0, [string length])
                ];
                
                if (matchVersion) {
                    NSRange firstHalfRangeVersion = [matchVersion rangeAtIndex:1];
                    NSLog(@"Matched version: %@", [string substringWithRange:firstHalfRangeVersion]);
                } else {
                    NSLog(@"Between versions 1.2 and 2.");
                }
                
                
            } else
            if ([[string substringWithRange:firstHalfRange] isEqualToString:@"MacROM for CHRP 1.1."]) {
                NSLog(@"Version 1.1 or 1.1.2");
            }
            
        } else {
            NSLog(@"File not identified.");
        }

    }
    return 0;
}