source: git/factory/templates/ftmpl_functions.h @ e4fe2b

jengelh-datetimespielwiese
Last change on this file since e4fe2b was e4fe2b, checked in by Oleksandr Motsak <motsak@…>, 11 years ago
FIX: Fixed huge BUG in cf_gmp.h CHG: starting to cleanup factory
  • Property mode set to 100644
File size: 1.9 KB
Line 
1/* emacs edit mode for this file is -*- C++ -*- */
2/* $Id$ */
3
4#ifndef INCL_FUNCTIONS_H
5#define INCL_FUNCTIONS_H
6
7//{{{ docu
8//
9// ftmpl_functions.h - some useful template functions.
10//
11// Header file corresponds to: nothing
12//
13// Hierarchy: bottom, templates
14//
15// Developer note:
16// ---------------
17// Sooner or later you need them: functions to calculate the
18// minimum or maximum of two values or the absolute value.  Here
19// they are.  All of them are inlined, hence there is no source
20// file corresponding to `ftmpl_functions.h'.
21//
22// The functions are for internal use only (i.e., to build the
23// library), hence they should not be included from `factory.h'.
24// However, we have to install `ftmpl_functions.h' with the other
25// templates since the functions have to be instantiated.
26//
27//}}}
28
29// #include <factory/factoryconf.h>
30
31//{{{ template <class T> inline T tmax ( const T & a, const T & b )
32//{{{ docu
33//
34// tmax() - return the maximum of `a' and `b'.
35//
36// Developers note:
37// ----------------
38// `T' should have an `operator >()'.
39//
40//}}}
41template <class T>
42inline T tmax ( const T & a, const T & b )
43{
44    return (a > b) ? a : b;
45}
46//}}}
47
48//{{{ template <class T> inline T tmin ( const T & a, const T & b )
49//{{{ docu
50//
51// tmin() - return the minimum of `a' and `b'.
52//
53// Developers note:
54// ----------------
55// `T' should have an `operator <()'.
56//
57//}}}
58template <class T>
59inline T tmin ( const T & a, const T & b )
60{
61    return (a < b) ? a : b;
62}
63//}}}
64
65//{{{ template <class T> inline T tabs ( const T & a )
66//{{{ docu
67//
68// tabs() - return the absolute value of `a'.
69//
70// `a' is negated iff it is less or equal `T( 0 )'.
71//
72// Developers note:
73// ----------------
74// `T' should have an `operator >()', an `operator -()', and a
75// `T::T( int )' constructor.
76//
77//}}}
78template <class T>
79inline T tabs ( const T & a )
80{
81    return (a > T( 0 )) ? a : -a;
82}
83//}}}
84
85#endif /* ! INCL_FUNCTIONS_H */
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