Min_Max.h

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00001 // -*- C++ -*-
00002 
00003 //=============================================================================
00004 /**
00005  *  @file   Min_Max.h
00006  *
00007  *  Min_Max.h,v 4.7 2005/10/28 16:14:53 ossama Exp
00008  *
00009  * Define an appropriate set of min()/max() functions using templates.
00010  *
00011  *
00012  *  @author Derek Dominish <Derek.Dominish@Australia.Boeing.com>
00013  */
00014 //=============================================================================
00015 
00016 #ifndef ACE_MIN_MAX_H
00017 #define ACE_MIN_MAX_H
00018 #include /**/ "ace/pre.h"
00019 
00020 #include "ace/config-all.h"
00021 
00022 # if !defined (ACE_LACKS_PRAGMA_ONCE)
00023 #   pragma once
00024 # endif /* ACE_LACKS_PRAGMA_ONCE */
00025 
00026 # if !defined (ACE_LACKS_MIN_MAX_TEMPLATES)
00027 
00028 ACE_BEGIN_VERSIONED_NAMESPACE_DECL
00029 
00030 template <class T>
00031 inline const T &
00032 ace_min (const T &t1, const T &t2)
00033 {
00034   return t2 > t1 ? t1 : t2;
00035 }
00036 
00037 template <class T>
00038 inline const T &
00039 ace_max (const T &t1, const T &t2)
00040 {
00041   return t1 > t2 ? t1 : t2;
00042 }
00043 
00044 template <class T>
00045 inline const T &
00046 ace_min (const T &t1, const T &t2, const T &t3)
00047 {
00048   return ace_min (ace_min (t1, t2), t3);
00049 }
00050 
00051 template <class T>
00052 inline const T &
00053 ace_max (const T &t1, const T &t2, const T &t3)
00054 {
00055   return ace_max (ace_max (t1, t2), t3);
00056 }
00057 
00058 template <class T>
00059 inline const T &
00060 ace_range (const T &min, const T &max, const T &val)
00061 {
00062   return ace_min (ace_max (min, val), max);
00063 }
00064 
00065 ACE_END_VERSIONED_NAMESPACE_DECL
00066 
00067 # else
00068 // These macros should only be used if a C++ compiler can't grok the
00069 // inline templates
00070 #  define ace_min(a,b)      (((b) > (a)) ? (a) : (b))
00071 #  define ace_max(a,b)      (((a) > (b)) ? (a) : (b))
00072 #  define ace_range(a,b,c)  (ace_min(ace_max((a), (c)), (b))
00073 
00074 # endif /* ACE_LACKS_MIN_MAX_TEMPLATES */
00075 
00076 # define ACE_MIN(a,b)     ace_min((a),(b))
00077 # define ACE_MAX(a,b)     ace_max((a),(b))
00078 # define ACE_RANGE(a,b,c) ace_range((a),(b),(c))
00079 
00080 #include /**/ "ace/post.h"
00081 #endif  /* ACE_MIN_MAX_H */

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