NSStringArgs.m

//
//  NSStringArgs.m
//  ssh-obj
//
//  Created by Mike Fluff on 2/11/11.
//  Copyright 2011 __MyCompanyName__. All rights reserved.
//

#import "NSStringArgs.h"


@implementation NSString (NSStringPerso)
+ (NSString *)setContentWithFormat:(NSString *)formatString arguments:(NSArray *)arguments
{
        
        
        char *argList = (char *)malloc(sizeof(NSString *) * [arguments count]);
        [arguments getObjects:(id *)argList];
        
        NSString *contents = [[NSString alloc] initWithFormat:formatString arguments:argList];
        
        free(argList);
        return contents;
}
+ (NSString *)setContentWithFormat:(NSString *)formatString, ...
{
    va_list args;
    va_start(args, formatString);
    NSString *contents = [[NSString alloc] initWithFormat:formatString arguments:args];
    va_end(args);
    return contents;
}
+ (NSString *)MyStringWithRandomUppercaseLetter:(int)len {
    srand ( time(NULL) );
    
    NSMutableString *randomString = [NSMutableString stringWithCapacity: len];
    for(int i=0;i<len;i++)
    {
        unichar letter = (rand() % 25 + 65);
        [randomString appendString:[NSString stringWithCharacters:&letter length:1]];
    }
    return randomString;
}

@end

@implementation NSString (ParsingExtensions)

-(NSArray *)csvRows {
    NSMutableArray *rows = [NSMutableArray array];
	
    // Get newline character set
    NSMutableCharacterSet *newlineCharacterSet = (id)[NSMutableCharacterSet whitespaceAndNewlineCharacterSet];
    [newlineCharacterSet formIntersectionWithCharacterSet:[[NSCharacterSet whitespaceCharacterSet] invertedSet]];
	
    // Characters that are important to the parser
    NSMutableCharacterSet *importantCharactersSet = (id)[NSMutableCharacterSet characterSetWithCharactersInString:@",\""];
    [importantCharactersSet formUnionWithCharacterSet:newlineCharacterSet];
	
    // Create scanner, and scan string
    NSScanner *scanner = [NSScanner scannerWithString:self];
    [scanner setCharactersToBeSkipped:nil];
    while ( ![scanner isAtEnd] ) {        
        BOOL insideQuotes = NO;
        BOOL finishedRow = NO;
        NSMutableArray *columns = [NSMutableArray arrayWithCapacity:10];
        NSMutableString *currentColumn = [NSMutableString string];
        while ( !finishedRow ) {
            NSString *tempString;
            if ( [scanner scanUpToCharactersFromSet:importantCharactersSet intoString:&tempString] ) {
                [currentColumn appendString:tempString];
            }
			
            if ( [scanner isAtEnd] ) {
                if ( ![currentColumn isEqualToString:@""] ) [columns addObject:currentColumn];
                finishedRow = YES;
            }
            else if ( [scanner scanCharactersFromSet:newlineCharacterSet intoString:&tempString] ) {
                if ( insideQuotes ) {
                    // Add line break to column text
                    [currentColumn appendString:tempString];
                }
                else {
                    // End of row
                    if ( ![currentColumn isEqualToString:@""] ) [columns addObject:currentColumn];
                    finishedRow = YES;
                }
            }
            else if ( [scanner scanString:@"\"" intoString:NULL] ) {
                if ( insideQuotes && [scanner scanString:@"\"" intoString:NULL] ) {
                    // Replace double quotes with a single quote in the column string.
                    [currentColumn appendString:@"\""]; 
                }
                else {
                    // Start or end of a quoted string.
                    insideQuotes = !insideQuotes;
                }
            }
            else if ( [scanner scanString:@"," intoString:NULL] ) {  
                if ( insideQuotes ) {
                    [currentColumn appendString:@","];
                }
                else {
                    // This is a column separating comma
                    [columns addObject:currentColumn];
                    currentColumn = [NSMutableString string];
                    [scanner scanCharactersFromSet:[NSCharacterSet whitespaceCharacterSet] intoString:NULL];
                }
            }
        }
        if ( [columns count] > 0 ) [rows addObject:columns];
    }
	
    return rows;
}

- (NSString *) shuffledString {
    NSMutableString * shuffled = [self mutableCopy];
    NSUInteger length = [shuffled length];
    for (int i = 0; i < (4*length); ++i) {
        NSString * randomChar = [shuffled subStringWithRange:NSMakeRange(arc4random() % (length-1), 1)];
        [shuffled appendString:randomChar];
    }
    return [shuffled autorelease];
}

@end