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/* (C) Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005 Stijn van Dongen
* (C) Copyright 2006, 2007, 2008, 2009 Stijn van Dongen
*
* This file is part of tingea. You can redistribute and/or modify tingea
* under the terms of the GNU General Public License; either version 3 of the
* License or (at your option) any later version. You should have received a
* copy of the GPL along with tingea, in the file COPYING.
*/
#ifndef minmax_h
#define minmax_h
#include "compile.h"
#if MCX_GNUC_OK && TINGEA__TYPED_MINMAX
/* these buggers do not nest, which I dislike */
# define MCX_MAX(x,y) \
( { const typeof(x) _x = x; \
const typeof(y) _y = y; \
(void) (&_x == &_y); \
_x > _y ? _x : _y; \
} )
# define MCX_MIN(x,y) \
( { const typeof(x) _x = x; \
const typeof(y) _y = y; \
(void) (&_x == &_y); \
_x < _y ? _x : _y; \
} )
#else
/* The usual brain-damaged min and max, which do nest though. */
# define MCX_MAX(a,b) ((a)>(b) ? (a) : (b))
# define MCX_MIN(a,b) ((a)<(b) ? (a) : (b))
#endif
#define ABS(x) ((x) > 0 ? (x) : (x) < 0 ? (-(x)) : 0)
/* The first version cannot be used recursively.
* I don't like this at all I think, which is why I turned it off.
*/
#if 0 && MCX_GNUC_OK
# define MCX_SIGN(a) \
__extension__ \
( { typedef _ta = (a) \
; _ta _a = (a) \
; _a > 0 \
? 1 \
: _a < 0 \
? -1 \
: 0 \
; } \
)
#else
# define MCX_SIGN(a) \
((a) > 0 ? 1 : !(a) ? 0 : -1)
#endif
#define MCX_RESTRICT(x,a,b) \
do { if (x < a) x = a; else if (x > b) x = b; } while (0)
#endif
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