CXXR (C++ R) API
Constants.h
1 /*CXXR $Id: Constants.h 1348 2013-02-25 17:49:03Z arr $
2  *CXXR
3  *CXXR This file is part of CXXR, a project to refactor the R interpreter
4  *CXXR into C++. It may consist in whole or in part of program code and
5  *CXXR documentation taken from the R project itself, incorporated into
6  *CXXR CXXR (and possibly MODIFIED) under the terms of the GNU General Public
7  *CXXR Licence.
8  *CXXR
9  *CXXR CXXR is Copyright (C) 2008-13 Andrew R. Runnalls, subject to such other
10  *CXXR copyrights and copyright restrictions as may be stated below.
11  *CXXR
12  *CXXR CXXR is not part of the R project, and bugs and other issues should
13  *CXXR not be reported via r-bugs or other R project channels; instead refer
14  *CXXR to the CXXR website.
15  *CXXR */
16 
17 /*
18  * R : A Computer Language for Statistical Data Analysis
19  * Copyright (C) 1995, 1996 Robert Gentleman and Ross Ihaka
20  * Copyright (C) 1998-2012 The R Core Team.
21  *
22  * This program is free software; you can redistribute it and/or modify
23  * it under the terms of the GNU Lesser General Public License as published by
24  * the Free Software Foundation; either version 2.1 of the License, or
25  * (at your option) any later version.
26  *
27  * This program is distributed in the hope that it will be useful,
28  * but WITHOUT ANY WARRANTY; without even the implied warranty of
29  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
30  * GNU Lesser General Public License for more details.
31  *
32  * You should have received a copy of the GNU Lesser General Public License
33  * along with this program; if not, a copy is available at
34  * http://www.r-project.org/Licenses/
35  */
36 
37 #ifndef R_EXT_CONSTANTS_H_
38 #define R_EXT_CONSTANTS_H_
39 
40 /* usually in math.h, but not with strict C99 compliance */
41 #ifndef M_PI
42 #define M_PI 3.141592653589793238462643383279502884197169399375
43 #endif
44 
45 #ifndef STRICT_R_HEADERS
46 #define PI M_PI
47 #include <float.h> /* Defines the rest, at least in C99 */
48 #define SINGLE_EPS FLT_EPSILON
49 #define SINGLE_BASE FLT_RADIX
50 #define SINGLE_XMIN FLT_MIN
51 #define SINGLE_XMAX FLT_MAX
52 #define DOUBLE_DIGITS DBL_MANT_DIG
53 #define DOUBLE_EPS DBL_EPSILON
54 #define DOUBLE_XMAX DBL_MAX
55 #define DOUBLE_XMIN DBL_MIN
56 #endif
57 
58 #endif /* R_EXT_CONSTANTS_H_ */