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/* Copyright (c) 2003-2004, Roger Dingledine
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
* Copyright (c) 2007-2021, The Tor Project, Inc. */
/* See LICENSE for licensing information */
/**
* \file cmp.h
*
* \brief Macro definitions for MIN, MAX, and CLAMP.
**/
#ifndef TOR_INTMATH_CMP_H
#define TOR_INTMATH_CMP_H
/** Macros for MIN/MAX. Never use these when the arguments could have
* side-effects.
* {With GCC extensions we could probably define a safer MIN/MAX. But
* depending on that safety would be dangerous, since not every platform
* has it.}
**/
#ifndef MAX
#define MAX(a,b) ( ((a)<(b)) ? (b) : (a) )
#endif
#ifndef MIN
#define MIN(a,b) ( ((a)>(b)) ? (b) : (a) )
#endif
/* Return <b>v</b> if it's between <b>min</b> and <b>max</b>. Otherwise
* return <b>min</b> if <b>v</b> is smaller than <b>min</b>, or <b>max</b> if
* <b>b</b> is larger than <b>max</b>.
*
* Requires that <b>min</b> is no more than <b>max</b>. May evaluate any of
* its arguments more than once! */
#define CLAMP(min,v,max) \
( ((v) < (min)) ? (min) : \
((v) > (max)) ? (max) : \
(v) )
/** Give the absolute value of <b>x</b>, independent of its type. */
#define ABS(x) ( ((x)<0) ? -(x) : (x) )
#endif /* !defined(TOR_INTMATH_CMP_H) */
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