Convert weird Mac OS file reference URL to a POSIX path

file_reference_url.mm

#import <Foundation/Foundation.h>
#import <Foundation/NSUrl.h>
#import <Foundation/NSString.h>

// file_reference_url.mm: convert weird Mac OS file reference URL to a file URL
// Compilation:
//     gcc -o file_reference_url file_reference_url.mm -framework Cocoa
// Example:
//     ./file_reference_url file:///.file/id=6571367.15106761

int main( int argc, const char *argv[] ) {
  NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
  NSLog(@"url = %@", [[[NSURL URLWithString: [NSString stringWithUTF8String: argv[1]]] filePathURL] absoluteString]);
  [pool release];
  return 0;
}