//-----------------------------------------------------------------------------
// Copyright © 2005 - Philip Howard - All rights reserved
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
//-----------------------------------------------------------------------------
// package	libh/ctools
// homepage	http://libh.slashusr.org/
//-----------------------------------------------------------------------------
// author	Philip Howard
// email	libh at ipal dot org
// homepage	http://phil.ipal.org/
//-----------------------------------------------------------------------------
// This file is best viewed using a fixed spaced font such as Courier
// and in a display at least 120 columns wide.
//-----------------------------------------------------------------------------

__FMACRO_BEGIN__
//-----------------------------------------------------------------------------
// macro        getenv_or_default
//
// purpose      Get an environment variable (similar to getenv()) except that
//              if the variable is not defined, use a supplied default instead.
//
// argument     1 (const char *) environment variable name
//              2 (const char *) default value to use
//
// returns      (const char *) environment variable value or default value
//-----------------------------------------------------------------------------
#define getenv_or_default(n,d) ({						\
	const char *libh__str;							\
	libh__str=getenv((n));							\
	if(!libh__str)libh__str=(d);						\
	libh__str;								\
})

__FMACRO_END__