Script parser

ScriptParser.h

//
//  ScriptParser.h
//
//  Created by Kostiantyn Teterin on 9/7/10.
//  Copyright 2010 Emotion Rays Entertainment. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface ScriptParser : NSObject {
	NSMutableArray *actions;
	NSMutableArray *parameters;
	
	int currentPointer;
}

-(id)init;
-(void)dealloc;

-(BOOL)parse:(NSString*)fileName;
-(NSString*)getValue:(NSString*)key;
-(NSMutableArray*)getValues:(NSString*)key;

-(NSString*)getCurrentAction;
-(NSString*)getCurrentParameter;
-(NSMutableArray*)getCurrentParameters;
-(BOOL)nextStep;

-(NSMutableArray*)breakValues:(NSString*)vals;
-(bool)isEmpty;
-(int)count;

@end

ScriptParser.m

//
//  ScriptParser.m
//
//  Created by Kostiantyn Teterin on 9/7/10.
//  Copyright 2010 Emotion Rays Entertainment. All rights reserved.
//

#import "ScriptParser.h"


@implementation ScriptParser

-(id)init
{
	[super init];
	actions = [[NSMutableArray alloc] init];
	parameters = [[NSMutableArray alloc] init];
	
	return self;
}

-(void)dealloc
{
	[actions release];
	[parameters release];
	[super dealloc];
}

-(BOOL)parse:(NSString*)fileName
{
	NSError *err;
    NSString *file;
    if([fileName characterAtIndex:0] == '/')
        file = [NSString stringWithContentsOfFile:fileName encoding:NSUTF8StringEncoding error:&err];
    else
        file = [NSString stringWithContentsOfFile:[[NSBundle mainBundle] pathForResource:fileName ofType:nil] encoding:NSUTF8StringEncoding error:&err];
//	NSLog(@"----------------------------------");
//	NSLog(@"Parsing file: %@", fileName);
    NSAutoreleasePool *pool1 = [[NSAutoreleasePool alloc] init];
	if(file)
	{
		int pointer = 0;
		while(pointer < [file length])
		{
			NSMutableString *action = [[NSMutableString alloc] initWithCapacity:1];
			NSMutableString *parameter = [[NSMutableString alloc] initWithCapacity:1];

			while(pointer < [file length] && [file characterAtIndex:pointer] != ' ' && [file characterAtIndex:pointer] != 13 && [file characterAtIndex:pointer] != 10)
			{
				[action appendString:[file substringWithRange:NSMakeRange(pointer, 1)]];
				++pointer;
			}
			
			if([file characterAtIndex:pointer] != 13 && [file characterAtIndex:pointer] != 10)
			{
				++pointer;
				while(pointer < [file length] && [file characterAtIndex:pointer] != 13 && [file characterAtIndex:pointer] != 10)
				{
					[parameter appendString:[file substringWithRange:NSMakeRange(pointer, 1)]];
					++pointer;
				}
			}

			if([action length] > 0)
			{
				[actions addObject:action];
				[parameters addObject:parameter];
			}
			[action release];
			[parameter release];
	
			++pointer;
		}
	}
	else {
        NSLog(@"ScriptParser: Cannot parse file: %@", fileName);
		NSLog(@"--- Error: %@", [err localizedDescription]);
		return NO;
	}
    [pool1 drain];

	currentPointer = 0;
	return YES;
}
-(int)count
{
    return [actions count];
}

-(NSString*)getValue:(NSString*)key
{
	int pointer = 0;
	while(pointer < [actions count] && [[actions objectAtIndex:pointer] caseInsensitiveCompare:key] != NSOrderedSame) ++pointer;
	
	if(pointer < [actions count])
		return [parameters objectAtIndex:pointer];
	return nil;
}

-(NSString*)getCurrentAction;
{
	return [actions objectAtIndex:currentPointer];
}
-(NSString*)getCurrentParameter
{
	return [parameters objectAtIndex:currentPointer];
}
-(BOOL)nextStep
{
	++currentPointer;
	if(currentPointer < [actions count]) return YES;
	return NO;
}
-(NSMutableArray*)getValues:(NSString*)key
{
	return [self breakValues:[self getValue:key]];
}
-(NSMutableArray*)getCurrentParameters
{
	return [self breakValues:[self getCurrentParameter]];
}
-(NSMutableArray*)breakValues:(NSString*)vals
{
	if([vals length] > 0)
	{
		NSMutableArray *arr = [[NSMutableArray alloc] init];

		int pointer = 0;
		
		while(pointer < [vals length])
		{
			NSMutableString *param = [NSMutableString stringWithString:@""];
			[param retain];
			
			bool quote = NO;
			while(pointer < [vals length] && 
				  ((!quote && [vals characterAtIndex:pointer] != ' ' && [vals characterAtIndex:pointer] != ',') ||
				   (quote && [vals characterAtIndex:pointer] != '"'))
				  && [vals characterAtIndex:pointer] != 13 && [vals characterAtIndex:pointer] != 10)
			{
				if([vals characterAtIndex:pointer] == '"')
				{
					quote = YES;
				}
				else
				{
					if([vals characterAtIndex:pointer] == '\\') ++pointer;
					[param appendString:[vals substringWithRange:NSMakeRange(pointer, 1)]];
				}
				++pointer;
			}

			if([param length] > 0) [arr addObject:param];
			[param release];
			++pointer;
		}
		
		return arr;
	}
	return nil;
}
-(bool)isEmpty
{
    return [actions count] == 0;
}

@end