/*
 * abspath.h - 1.0
 * Copyright (C) 2000 Earnie Boyd and assigns
 * GNU General Public License (GPL) Version 2 or later.
 * This code may also be used with the GNU LGPL Version 2.0 or later to create 
 * a shared object library or a dynamically loadable library and that library 
 * is also goverened by the GNU Lesser General Public License (LGPL).
 *
 * These macros were created in the hopes that portability between DOS/WIN32
 * filesystems and UNIX filesystems may be coded more easily.
 *
 * Example 1:
 * char **pp;
 * for (pp = path; *pp; pp++)
 *    if (ISABSPATH(*&pp[0])
 *    {
 *	...
 *    }
 *
 * Example 2:
 * char *
 * somefunction(char *dir)
 * {
 *    ...
 *    if (ISABSPATH(dir))
 *    {
 *	...
 *    }
 *    ...
 * }
 * 
 * Send bug reports to:
 * <earnie_boyd@yahoo.com>
 */

#ifndef __WIN32__
# define ISDIRDELIM(s)  ((s) == '/')
#else 
# define ISDIRDELIM(s)  (((s) == '/' || (s) == '\\'))
#endif 

#define ISDIRCURNT(p)   (((p)[0] == '.' && (ISDIRDELIM((p)[1]) || !(p)[1])))
#define ISDIRPARNT(p)   (((p)[0] == '.' && (p)[1] == '.' && \
			  (ISDIRDELIM((p)[2]) || !(p)[2])))

#ifndef __WIN32__
# define ISABSPATH(p) (ISDIRDELIM((p)[0]) || ISDIRCURNT((p)) || ISDIRPARNT((p)))
#else 
# define ISABSPATH(p) (ISDIRDELIM((p)[0]) || \
			(isalpha((p)[0]) && (p)[1] == ':' && \
			(ISDIRDELIM((p)[2]))) || \
			(ISDIRCURNT((p)) || ISDIRPARNT((p))))
#endif