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+/*
+ * cocos2d for iPhone: http://www.cocos2d-iphone.org
+ *
+ * Copyright (c) 2008-2010 Ricardo Quesada
+ * Copyright (c) 2011 Zynga Inc.
+ * 
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ * 
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ * 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ */
+
+
+#import <Availability.h>
+#import "CCFileUtils.h"
+#import "../CCConfiguration.h"
+#import "../ccMacros.h"
+#import "../ccConfig.h"
+
+static NSFileManager *__localFileManager=nil;
+
+// 
+NSInteger ccLoadFileIntoMemory(const char *filename, unsigned char **out) 
+{ 
+        NSCAssert( out, @"ccLoadFileIntoMemory: invalid 'out' parameter");
+        NSCAssert( &*out, @"ccLoadFileIntoMemory: invalid 'out' parameter");
+
+        size_t size = 0;
+        FILE *f = fopen(filename, "rb");
+        if( !f ) { 
+                *out = NULL;
+                return -1;
+        } 
+        
+        fseek(f, 0, SEEK_END);
+        size = ftell(f);
+        fseek(f, 0, SEEK_SET);
+        
+        *out = malloc(size);
+        size_t read = fread(*out, 1, size, f);
+        if( read != size ) { 
+                free(*out);
+                *out = NULL;
+                return -1;
+        }
+        
+        fclose(f);
+        
+        return size;
+}
+
+NSString *ccRemoveHDSuffixFromFile( NSString *path )
+{
+#if CC_IS_RETINA_DISPLAY_SUPPORTED
+
+        if( CC_CONTENT_SCALE_FACTOR() == 2 ) {
+                                
+                NSString *name = [path lastPathComponent];
+                
+                // check if path already has the suffix.
+                if( [name rangeOfString:CC_RETINA_DISPLAY_FILENAME_SUFFIX].location != NSNotFound ) {
+                        
+                        CCLOG(@"cocos2d: Filename(%@) contains %@ suffix. Removing it. See cocos2d issue #1040", path, CC_RETINA_DISPLAY_FILENAME_SUFFIX);
+
+                        NSString *newLastname = [name stringByReplacingOccurrencesOfString:CC_RETINA_DISPLAY_FILENAME_SUFFIX withString:@""];
+                        
+                        NSString *pathWithoutLastname = [path stringByDeletingLastPathComponent];
+                        return [pathWithoutLastname stringByAppendingPathComponent:newLastname];
+                }               
+        }
+
+#endif // CC_IS_RETINA_DISPLAY_SUPPORTED
+
+        return path;
+
+}
+
+
+@implementation CCFileUtils
+
++(void) initialize
+{
+        if( self == [CCFileUtils class] )
+                __localFileManager = [[NSFileManager alloc] init];
+}
+
++(NSString*) getDoubleResolutionImage:(NSString*)path
+{
+#if CC_IS_RETINA_DISPLAY_SUPPORTED
+
+        if( CC_CONTENT_SCALE_FACTOR() == 2 )
+        {
+                
+                NSString *pathWithoutExtension = [path stringByDeletingPathExtension];
+                NSString *name = [pathWithoutExtension lastPathComponent];
+                
+                // check if path already has the suffix.
+                if( [name rangeOfString:CC_RETINA_DISPLAY_FILENAME_SUFFIX].location != NSNotFound ) {
+                
+                        CCLOG(@"cocos2d: WARNING Filename(%@) already has the suffix %@. Using it.", name, CC_RETINA_DISPLAY_FILENAME_SUFFIX);                  
+                        return path;
+                }
+
+                
+                NSString *extension = [path pathExtension];
+                
+                if( [extension isEqualToString:@"ccz"] || [extension isEqualToString:@"gz"] )
+                {
+                        // All ccz / gz files should be in the format filename.xxx.ccz
+                        // so we need to pull off the .xxx part of the extension as well
+                        extension = [NSString stringWithFormat:@"%@.%@", [pathWithoutExtension pathExtension], extension];
+                        pathWithoutExtension = [pathWithoutExtension stringByDeletingPathExtension];
+                }
+                
+                
+                NSString *retinaName = [pathWithoutExtension stringByAppendingString:CC_RETINA_DISPLAY_FILENAME_SUFFIX];
+                retinaName = [retinaName stringByAppendingPathExtension:extension];
+
+                if( [__localFileManager fileExistsAtPath:retinaName] )
+                        return retinaName;
+
+                CCLOG(@"cocos2d: CCFileUtils: Warning HD file not found: %@", [retinaName lastPathComponent] );
+        }
+        
+#endif // CC_IS_RETINA_DISPLAY_SUPPORTED
+        
+        return path;
+}
+
++(NSString*) fullPathFromRelativePath:(NSString*) relPath
+{
+        NSAssert(relPath != nil, @"CCFileUtils: Invalid path");
+
+        NSString *fullpath = nil;
+        
+        // only if it is not an absolute path
+        if( ! [relPath isAbsolutePath] )
+        {
+                NSString *file = [relPath lastPathComponent];
+                NSString *imageDirectory = [relPath stringByDeletingLastPathComponent];
+                
+                fullpath = [[NSBundle mainBundle] pathForResource:file
+                                                                                                   ofType:nil
+                                                                                          inDirectory:imageDirectory];
+        }
+        
+        if (fullpath == nil)
+                fullpath = relPath;
+        
+        fullpath = [self getDoubleResolutionImage:fullpath];
+        
+        return fullpath;        
+}
+
+@end