b311480e |
1 | // Created on: 1991-04-16 |
2 | // Created by: Arnaud BOUZY |
3 | // Copyright (c) 1991-1999 Matra Datavision |
973c2be1 |
4 | // Copyright (c) 1999-2014 OPEN CASCADE SAS |
b311480e |
5 | // |
973c2be1 |
6 | // This file is part of Open CASCADE Technology software library. |
b311480e |
7 | // |
d5f74e42 |
8 | // This library is free software; you can redistribute it and/or modify it under |
9 | // the terms of the GNU Lesser General Public License version 2.1 as published |
973c2be1 |
10 | // by the Free Software Foundation, with special exception defined in the file |
11 | // OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT |
12 | // distribution for complete text of the license and disclaimer of any warranty. |
b311480e |
13 | // |
973c2be1 |
14 | // Alternatively, this file may be used under the terms of Open CASCADE |
15 | // commercial license or contractual agreement. |
7fd59977 |
16 | |
42cf5bc1 |
17 | |
18 | #include <Expr.hxx> |
19 | #include <Expr_GeneralExpression.hxx> |
20 | #include <Expr_NamedUnknown.hxx> |
21 | #include <Expr_NotEvaluable.hxx> |
7fd59977 |
22 | #include <Expr_NumericValue.hxx> |
23 | #include <Expr_Operators.hxx> |
42cf5bc1 |
24 | #include <Expr_UnaryMinus.hxx> |
25 | #include <Standard_NumericError.hxx> |
7fd59977 |
26 | #include <Standard_OutOfRange.hxx> |
42cf5bc1 |
27 | #include <Standard_Type.hxx> |
28 | #include <TCollection_AsciiString.hxx> |
7fd59977 |
29 | |
92efcf78 |
30 | IMPLEMENT_STANDARD_RTTIEXT(Expr_UnaryMinus,Expr_UnaryExpression) |
31 | |
7fd59977 |
32 | Expr_UnaryMinus::Expr_UnaryMinus(const Handle(Expr_GeneralExpression)& exp) |
33 | { |
34 | CreateOperand(exp); |
35 | } |
36 | |
37 | Handle(Expr_GeneralExpression) Expr_UnaryMinus::ShallowSimplified () const |
38 | { |
39 | Handle(Expr_GeneralExpression) myexp = Operand(); |
40 | if (myexp->IsKind(STANDARD_TYPE(Expr_NumericValue))) { |
41 | Handle(Expr_NumericValue) myNVexp = Handle(Expr_NumericValue)::DownCast(myexp); |
42 | return new Expr_NumericValue(-myNVexp->GetValue()); |
43 | } |
44 | if (myexp->IsKind(STANDARD_TYPE(Expr_UnaryMinus))) { |
45 | return myexp->SubExpression(1); |
46 | } |
47 | Handle(Expr_UnaryMinus) me = this; |
48 | return me; |
49 | } |
50 | |
51 | Handle(Expr_GeneralExpression) Expr_UnaryMinus::Copy () const |
52 | { |
53 | return -(Expr::CopyShare(Operand())); |
54 | } |
55 | |
56 | Standard_Boolean Expr_UnaryMinus::IsIdentical (const Handle(Expr_GeneralExpression)& Other) const |
57 | { |
58 | if (Other->IsKind(STANDARD_TYPE(Expr_UnaryMinus))) { |
59 | Handle(Expr_GeneralExpression) myexp = Operand(); |
60 | return myexp->IsIdentical(Other->SubExpression(1)); |
61 | } |
62 | return Standard_False; |
63 | } |
64 | |
65 | Standard_Boolean Expr_UnaryMinus::IsLinear () const |
66 | { |
67 | Handle(Expr_GeneralExpression) myexp = Operand(); |
68 | return myexp->IsLinear(); |
69 | } |
70 | |
71 | Handle(Expr_GeneralExpression) Expr_UnaryMinus::Derivative (const Handle(Expr_NamedUnknown)& X) const |
72 | { |
73 | Handle(Expr_GeneralExpression) myder = Operand(); |
74 | myder = myder->Derivative(X); |
75 | Handle(Expr_UnaryMinus) resu = - myder; |
76 | return resu->ShallowSimplified(); |
77 | } |
78 | |
79 | Handle(Expr_GeneralExpression) Expr_UnaryMinus::NDerivative (const Handle(Expr_NamedUnknown)& X, const Standard_Integer N) const |
80 | { |
81 | if (N <= 0) { |
9775fa61 |
82 | throw Standard_OutOfRange(); |
7fd59977 |
83 | } |
84 | Handle(Expr_GeneralExpression) myder = Operand(); |
85 | myder = myder->NDerivative(X,N); |
86 | Handle(Expr_UnaryMinus) resu = - myder; |
87 | return resu->ShallowSimplified(); |
88 | } |
89 | |
90 | Standard_Real Expr_UnaryMinus::Evaluate(const Expr_Array1OfNamedUnknown& vars, const TColStd_Array1OfReal& vals) const |
91 | { |
92 | return - Operand()->Evaluate(vars,vals); |
93 | } |
94 | |
95 | TCollection_AsciiString Expr_UnaryMinus::String() const |
96 | { |
97 | TCollection_AsciiString str; |
98 | Handle(Expr_GeneralExpression) op = Operand(); |
99 | if (op->NbSubExpressions() > 1) { |
100 | str = "-("; |
101 | str += op->String(); |
102 | str += ")"; |
103 | } |
104 | else { |
105 | str = "-"; |
106 | str += op->String(); |
107 | } |
108 | return str; |
109 | } |