commons.h

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/**
 * \file
 * Common reusable definitions.
 * 
 * \todo All public symbols need to be prefixed to make name clashes
 *       more unlikely.
 *
 * \author  Georg Hopp
 *
 * \copyright
 * Copyright © 2014 Georg Hopp
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */

#ifndef __TR_COMMONS_H__
#define __TR_COMMONS_H__

#define Bool    char
#ifdef TRUE
#   undef TRUE
#endif
#ifdef FALSE
#   undef FALSE
#endif

#define TRUE    1
#define FALSE   0

#ifndef MAX
#   define MAX(a,b) ((a)>(b)? (a) : (b))
#endif

#ifndef MIN
#   define MIN(a,b) ((a)<(b)? (a) : (b))
#endif 

/**
 * XOR variant of swapping a variable
 */
#define SWAP_XOR(a, b)  ((a)^=(b),(b)^=(a),(a)^=(b))

/**
 * swap two variable through an intermediate.
 */
#define SWAP(type, a, b) do { \
    type tmp = (a);           \
    (a) = (b);                \
    (b) = tmp;                \
} while(0);

/**
 * Const STRing Argument
 * This makro evaluates to two function argument.
 *
 * \param char* val A NULL terminated static string.
 */
#define CSTRA(val)  val, sizeof(val)-1 //!< Const STRing Argument

#endif // __TR_COMMONS_H__

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