/usr/include/BoxLib/SPACE.H is in libbox-dev 2.5-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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** (c) 1996-2000 The Regents of the University of California (through
** E.O. Lawrence Berkeley National Laboratory), subject to approval by
** the U.S. Department of Energy. Your use of this software is under
** license -- the license agreement is attached and included in the
** directory as license.txt or you may contact Berkeley Lab's Technology
** Transfer Department at TTD@lbl.gov. NOTICE OF U.S. GOVERNMENT RIGHTS.
** The Software was developed under funding from the U.S. Government
** which consequently retains certain rights as follows: the
** U.S. Government has been granted for itself and others acting on its
** behalf a paid-up, nonexclusive, irrevocable, worldwide license in the
** Software to reproduce, prepare derivative works, and perform publicly
** and display publicly. Beginning five (5) years after the date
** permission to assert copyright is obtained from the U.S. Department of
** Energy, and subject to any subsequent five (5) year renewals, the
** U.S. Government is granted for itself and others acting on its behalf
** a paid-up, nonexclusive, irrevocable, worldwide license in the
** Software to reproduce, prepare derivative works, distribute copies to
** the public, perform publicly and display publicly, and to permit
** others to do so.
*/
#ifndef BL_SPACE_H
#define BL_SPACE_H
/*
** $Id: SPACE.H,v 1.11 2002/04/26 22:10:01 lijewski Exp $
*/
#if defined(BL_SPACEDIM) && !defined(SPACEDIM)
#define SPACEDIM BL_SPACEDIM
#elif defined(SPACEDIM) && !defined(BL_SPACEDIM)
/*@ManDoc:
The BL\_SPACEDIM macro specifies the dimension of the BoxLib library
to be built. Acceptable values are either 1, 2, or 3. This macro
must be set for every compilation as many of the data structures of
BoxLib rely on it being set.
Code that depends on the dimensionality of the problem that you're
trying to solve should be cast in terms of this macro.
*/
#define BL_SPACEDIM SPACEDIM
#elif defined(BL_SPACEDIM) && defined(SPACEDIM)
#elif BL_SPACEDIM != SPACEDIM
#error SPACEDIM and BL_SPACEDIM must be identically defined
#else
#error At least one of BL_SPACEDIM or SPACEDIM must be defined
#endif
#if (BL_SPACEDIM != 1 && BL_SPACEDIM !=2 && BL_SPACEDIM != 3)
#error BL_SPACEDIM must be either 1, 2, or 3
#endif
#if !defined(BL_LANG_FORT)
/*@ManDoc:
The SpaceDim C++ integer constant specifies the dimension of the
BoxLib library to be built. It is initialized to the value of
the macro BL\_SPACEDIM. Hence it will have one of the values 1, 2, or 3.
C++ code that depends on the dimensionality of the problem that
you're trying to solve should be cast in terms of this constant,
instead of the BL\_SPACEDIM macro, if possible, as constants are
visible to debuggers while macros are not.
*/
namespace BoxLib
{
const int SpaceDim = BL_SPACEDIM;
}
#endif
#if BL_SPACEDIM==1
/*@ManDoc:
The D\_EXPR(a,b,c) macro expands to a comma expression that will
evaluate SpaceDim of its arguments, counting from the left; i.e.
BL\_SPACEDIM==1 implies only `a' is evaluated, BL\_SPACEDIM==2
implies both `a' and `b', and BL\_SPACEDIM==3 implies all three
arguments are evaluated. This macro can be used to enhance
the portability of code that works with structures whose size
depends on BL\_SPACEDIM.
For example:
D\_EXPR(vect[0] *= s, vect[1] *= s, vect[2] *= s);
More explicitly, this macro evaluates to one of
((void)((a),0))
((void)((a),(b),0))
((void)((a),(b),(c),0))
corresponding to BL\_SPACEDIM values of 1, 2, or 3.
*/
# define D_EXPR(a,b,c) ((void)((a),0))
/*@ManDoc:
The D\_DECL(a,b,c) macro expands to a comma-separated list of
1, 2, or all 3 of the arguments of the call, depending on the
value of BL\_SPACEDIM. This can be used to write portable
function calls that depend on 1, 2, or 3 arguments, corresponding
to the value of BL\_SPACEDIM.
For example:
return IntVect(D\_DECL(p[0] + s, p[1] + s, p[2] + s));
More explicitly, this macro evaluates to one of
a
a,b
a,b,c
corresponding to BL\_SPACEDIM values of 1, 2, or 3.
*/
# define D_DECL(a,b,c) a
/*@ManDoc:
The D\_TERM(a,b,c) macro expands to a whitespace-separated list of
1, 2, or all 3 of the arguments of the call, depending on the value
of BL\_SPACEDIM. This can be used to write program logic
that depend on 1, 2, or 3 arguments, corresponding to
the value of BL\_SPACEDIM.
For example:
return D\_TERM(len[0], *len[1], *len[2]);
More explicitly, this macro evaluates to one of
a
a b
a b c
corresponding to BL\_SPACEDIM values of 1, 2, or 3.
*/
# define D_TERM(a,b,c) a
/*@ManDoc:
The D\_PICK(a,b,c) macro expands to a single result equal to the
1st, 2nd, or 3rd of the arguments of the call, depending on the value
of BL\_SPACEDIM. This can be used to write program logic
that depend on the value of BL\_SPACEDIM.
For example:
maxsize = D_PICK(1024, 128, 32);
More explicitly, this macro evaluates to one of
maxsize = 1024;
maxsize = 128;
maxsize = 32;
corresponding to BL\_SPACEDIM values of 1, 2, or 3.
*/
# define D_PICK(a,b,c) a
#elif BL_SPACEDIM==2
# define D_EXPR(a,b,c) ((void)((a),(b),0))
# define D_DECL(a,b,c) a,b
# define D_TERM(a,b,c) a b
# define D_PICK(a,b,c) b
#elif BL_SPACEDIM==3
# define D_EXPR(a,b,c) ((void)((a),(b),(c),0))
# define D_DECL(a,b,c) a,b,c
# define D_TERM(a,b,c) a b c
# define D_PICK(a,b,c) c
#endif
#endif /*BL_SPACE_H*/
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