NAME

       make_relative_filename  -  Tries  to  make  a  relative  filename  from  absolute path and
       filename. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       char *make_relative_filename(char *dest, const  char  *path,  const  char  *filename,  int
       size);

DESCRIPTION

       Attempts  to  make  a  relative  filename  from an absolute path and an absolute filename,
       storing at most `size' bytes into the `dest' buffer. This function won't work if the paths
       are  not  canonical under the current platform (see canonicalize_filename()). Also, `dest'
       cannot be used as input value for `path' or `filename'. Example:

          char base[] = "/long/absolute/path/program.exe";
          char user_input[] = "/nice/and/short.txt";
          ...
          make_relative_filename(buf, base, user_input, sizeof(buf));
          /* Under Unix buf would contain:
             ../../../nice/and/short.txt */

RETURN VALUE

       Returns a copy of the `dest' parameter if it succeeds or NULL if it fails (eg. under  DOS,
       one path starts with "C:\" and another with "A:\").

SEE ALSO

       make_absolute_filename(3alleg4),                            is_relative_filename(3alleg4),
       canonicalize_filename(3alleg4)