//  @ Project : hello eagl ++
//  @ File Name : IO.mm
//  @ Date : 2008-4-8
//  @ Author : kongfu.yang
//  @ Company : http://www.play3d.net
//  @ Copyright : 2008-4, Example source license. 
//        By keep this header comment, 
//        you may use this source file in your project for non-commercial or commercial purpose.

#import "IO.h"
#import "Foundation/Foundation.h"


#ifdef _cplusplus
extern "C" {
#endif // cpp

static inline unsigned int getCString(NSString * str, char * cstr, unsigned int bufSize)
{
    const char * utf8 = [str UTF8String];
	unsigned int size = [str length];
	if ( size > bufSize )
	   size = bufSize-1;
    memcpy(cstr, utf8, size);
	return size;
}

int getCurrentDir(char * path, unsigned int maxLen)
{
   NSString * cur = [[NSFileManager defaultManager] currentDirectoryPath];
   return getCString(cur, path, maxLen);    
}

int getUserHome(char * path, unsigned int maxLen)
{
    NSString * home = NSHomeDirectory();
	return getCString(home, path, maxLen);
}

int getAppHome(char * path, unsigned int maxLen)
{
    NSBundle * mb = [NSBundle mainBundle];
	NSString * mbp = [mb bundlePath];
	return getCString(mbp, path, maxLen);
}

inline unsigned short pathSeparator(void)
{
    return '/';
}

void appendPath(char * path, char * component)
{
    unsigned int len = strlen(path);
	if ( path[len] != pathSeparator() )
	{
		path[len] = (char) pathSeparator();
		path[len+1] = 0;
	}
    char * p = component;
	if ( *p == pathSeparator() ) p++;
	strcat(path, p);
}

char * concatePath(char * path1, char * path2)
{
     size_t len1 = strlen(path1);
	 size_t len2 = strlen(path2);
     char * resultPath = (char * ) malloc( len1 + len2 + 1 );
	 strcpy(resultPath, path1);
	 
	 appendPath(resultPath, path2);
	 
	 return resultPath;	 
}


#ifdef _cplusplus
}
#endif // cpp