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differentiate.h
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1 /*
2  * differentiate.h - definitions for Qucs equation derivatives
3  *
4  * Copyright (C) 2007, 2008 Stefan Jahn <stefan@lkcc.org>
5  *
6  * This is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2, or (at your option)
9  * any later version.
10  *
11  * This software is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14  * GNU General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public License
17  * along with this package; see the file COPYING. If not, write to
18  * the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
19  * Boston, MA 02110-1301, USA.
20  *
21  * $Id: differentiate.h 1825 2011-03-11 20:42:14Z ela $
22  *
23  */
24 
25 #ifndef __DIFFERENTIATE_H__
26 #define __DIFFERENTIATE_H__
27 
28 namespace eqn {
29 
30 class constant;
31 
32 /* This class is merely a container for the derivatives which can be
33  applied to equations. */
34 class differentiate
35 {
36  public:
37  static node * plus_binary (application *, char *);
38  static node * plus_unary (application *, char *);
39  static node * minus_binary (application *, char *);
40  static node * minus_unary (application *, char *);
41  static node * times (application *, char *);
42  static node * over (application *, char *);
43  static node * power (application *, char *);
44  static node * ln (application *, char *);
45  static node * log10 (application *, char *);
46  static node * log2 (application *, char *);
47  static node * sqrt (application *, char *);
48  static node * exp (application *, char *);
49  static node * sinc (application *, char *);
50  static node * norm (application *, char *);
51  static node * sin (application *, char *);
52  static node * cos (application *, char *);
53  static node * tan (application *, char *);
54  static node * sec (application *, char *);
55  static node * cot (application *, char *);
56  static node * cosec (application *, char *);
57  static node * arcsin (application *, char *);
58  static node * square (application *, char *);
59  static node * arccos (application *, char *);
60  static node * arctan (application *, char *);
61  static node * arccot (application *, char *);
62  static node * arcsec (application *, char *);
63  static node * arccosec (application *, char *);
64  static node * abs (application *, char *);
65  static node * step (application *, char *);
66  static node * sign (application *, char *);
67  static node * sinh (application *, char *);
68  static node * cosh (application *, char *);
69  static node * tanh (application *, char *);
70  static node * coth (application *, char *);
71  static node * arsinh (application *, char *);
72  static node * arcosh (application *, char *);
73  static node * artanh (application *, char *);
74  static node * arcoth (application *, char *);
75  static node * arsech (application *, char *);
76  static node * arcosech (application *, char *);
77  static node * ifthenelse (application *, char *);
78  static node * xhypot (application *, char *);
79  static node * limexp (application *, char *);
80  static node * vt (application *, char *);
81 
82  private:
83  static node * plus_reduce (node *, node *);
84  static node * minus_reduce (node *, node *);
85  static node * minus_reduce (node *);
86  static node * times_reduce (node *, node *);
87  static node * over_reduce (node *, node *);
88  static node * power_reduce (node *, node *);
89  static node * ln_reduce (node *);
90  static node * sqrt_reduce (node *);
91  static node * sqr_reduce (node *);
92  static node * app_reduce (const char *, node *, node *);
93  static node * hypot_reduce (node *, node *);
94 
95  private:
96  static void over_reduce_adv (node * &, node * &);
97 };
98 
99 // Type of derivative function.
100 typedef node * (* differentiator_t) (application *, char *);
101 
102 // Structure defining an differentiation.
103 struct differentiation_t
104 {
105  const char * application; /* the name of the application */
106  differentiator_t derive; /* the actual differentiation function */
107  int nargs; /* number of arguments */
108 };
109 
110 extern struct differentiation_t differentiations[];
111 
112 } /* namespace */
113 
114 #endif /* __DIFFERENTIATE_H__ */
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