XGSPathUtilities.m

//
//  XGSPathUtilities.m
//  GridStuffer
//
//  Created by Charles Parnot on 2/22/07.
//  Copyright 2005,2006,2007 Charles Parnot. All rights reserved.

/* GRIDSTUFFER_LICENSE_START */
/* This file is part of GridStuffer. GridStuffer is free software; you can redistribute it and/or modify it under the terms of the Berkeley Software Distribution (BSD) Modified License.*/
/* Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
 - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
 - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
 - Neither the name of the owner Charles Parnot nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
 
 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
/* GRIDSTUFFER_LICENSE_END */

#import "XGSPathUtilities.h"


BOOL CreateDirectory(NSString *aPath)
{
	NSString *parent;
    NSFileManager *fileManager;
	BOOL isDir;
	
	//impossible!!
    if ( ( aPath==nil ) || [aPath isEqualToString:@""] )
        return NO;
	
	//already done?
	if ( [aPath isEqualToString:@"/"] ) 
		return YES;
	fileManager = [NSFileManager defaultManager];
	isDir = NO;
    if ( [fileManager fileExistsAtPath:aPath isDirectory:&isDir] )
		return isDir;
	
	//create the parent and then the directory
    parent = [aPath stringByDeletingLastPathComponent];
	return ( CreateDirectory(parent) && [fileManager createDirectoryAtPath:aPath attributes:nil] );
}


//given a path, e.g. '/some/path/to/file.txt', returns the path for a non-existing file with the first suffix i >= suffix, such that file_i.txt does not exist yet; the 'suffix' pointer is used both as the starting value and to return the final value
NSString *UniqueNameWithPath(NSString *path, unsigned int *suffix)
{
    NSFileManager *fileManager;
	NSString *name, *parent, *extension;
	BOOL hasExtension;
	
	//get the different pieces of the path
	parent = [path stringByDeletingLastPathComponent];
	extension = [path pathExtension];
	if ( [extension isEqualToString:@""] )
		hasExtension = NO;
	else
		hasExtension = YES;
	name = [[path lastPathComponent] stringByDeletingPathExtension];
	
	//now test different integer suffixes until the file does not exist
	// (testing n>0 ensures that the loop will end, when n reaches MAX_INT)
	fileManager = [NSFileManager defaultManager];
	unsigned int n = *suffix - 1;
	do {
		n++;
		path = [NSString stringWithFormat:@"%@_%d",name,n];
		if ( hasExtension ) 
			path = [path stringByAppendingPathExtension:extension];
		path = [parent stringByAppendingPathComponent:path];
	} while ( [fileManager fileExistsAtPath:path] );
	*suffix=n;
	return path;
}

/*
@implementation XGSPathUtilities
@end
*/