int		DSK_dskf(char drv);
void	DSK_getExtName(char *fname,char *extName);
void	DSK_changeExtName(char *fname,char *ext);
void	DSK_toupperFileName(char *fname);
void	DSK_tolowerFileName(char *fname);
char	DSK_getDrive(char *fname);
char	DSK_extcmp(char *fname,char *extName);
char*	DSK_strchr(char *str,char find);
char*	DSK_strrchr(char *str,char find);
long	DSK_fsize(FILE *fp);
void	DSK_file2path(char *fname,char *pname);
int		iskanjif(char *str,char *n);
int		iskanjil(char *str,char *list);