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1 | /////////////////////////////////////////////////////////////////////////////// |
2 | // Copyright (c) 2000-2014 Ericsson Telecom AB | |
3 | // All rights reserved. This program and the accompanying materials | |
4 | // are made available under the terms of the Eclipse Public License v1.0 | |
5 | // which accompanies this distribution, and is available at | |
6 | // http://www.eclipse.org/legal/epl-v10.html | |
7 | /////////////////////////////////////////////////////////////////////////////// | |
8 | #ifndef _Common_Real_HH | |
9 | #define _Common_Real_HH | |
10 | ||
11 | #include "string.hh" | |
12 | #include <math.h> | |
13 | ||
14 | // older versions of gcc do not have numeric_limits<double> or it is wrong | |
15 | // and they do not have constants defined by C99 standard | |
16 | #ifdef INFINITY | |
17 | static const double REAL_INFINITY = INFINITY; | |
18 | #else | |
19 | #include <float.h> | |
20 | static const double REAL_INFINITY = (DBL_MAX*DBL_MAX); | |
21 | #endif | |
22 | ||
23 | #ifdef NAN | |
24 | static const double REAL_NAN = NAN; | |
25 | #else | |
26 | static const double REAL_NAN = (REAL_INFINITY-REAL_INFINITY); | |
27 | #endif | |
28 | ||
29 | namespace Common { | |
30 | ||
31 | class Location; | |
32 | ||
33 | /** | |
34 | * \defgroup Real Real type and related functions | |
35 | * | |
36 | * Real type is used to represent those real/float values which will | |
37 | * be used in TITAN run-time environment, in the compiler. | |
38 | * | |
39 | * @{ | |
40 | */ | |
41 | ||
42 | /** Real typedef */ | |
43 | ||
44 | typedef double Real; | |
45 | ||
46 | /** +/- infinity and not_a_number are non-numeric float values in ttcn-3, | |
47 | these special values cannot be used in some places */ | |
48 | bool isSpecialFloatValue(const Real& r); | |
49 | ||
50 | /** | |
51 | * Converts the Common::Real value to string. | |
52 | * | |
53 | * The returned string looks like this: | |
54 | * | |
55 | * <pre> | |
56 | ( | |
57 | ( | |
58 | ([\-][1-9]\.(([0-9]+[1-9])|0)) | |
59 | | | |
60 | ([\-]0\.([0-9]+[1-9])) | |
61 | ) | |
62 | "e" | |
63 | (([\-][1-9][0-9]*)|0) | |
64 | ) | |
65 | | | |
66 | (0\.0e0) | |
67 | | | |
68 | "INF" | |
69 | | | |
70 | "-INF" | |
71 | * </pre> | |
72 | */ | |
73 | string Real2string(const Real& r); | |
74 | ||
75 | /** Returns the C++ equivalent of value r */ | |
76 | string Real2code(const Real& r); | |
77 | ||
78 | /** | |
79 | * Converts the string value to Common::Real. | |
80 | */ | |
81 | Real string2Real(const char *s, const Location& loc); | |
82 | inline Real string2Real(const string& s, const Location& loc) | |
83 | { return string2Real(s.c_str(), loc); } | |
84 | /** @} end of Real group */ | |
85 | ||
86 | } // namespace Common | |
87 | ||
88 | #endif // _Common_Real_HH |