/usr/include/astrometry/qfits_float.h is in libastrometry-dev 0.70+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 | /* $Id: qfits_float.h,v 1.3 2006/02/17 10:24:52 yjung Exp $
*
* This file is part of the ESO QFITS Library
* Copyright (C) 2001-2004 European Southern Observatory
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/*
* $Author: yjung $
* $Date: 2006/02/17 10:24:52 $
* $Revision: 1.3 $
* $Name: qfits-6_2_0 $
*/
#ifndef QFITS_FLOAT_H
#define QFITS_FLOAT_H
/*-----------------------------------------------------------------------------
Macros
-----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------*/
/**
@brief Test a floating-point variable for NaN value.
@param n Number to test (float or double)
@return 1 if n is NaN, 0 else.
This macro is needed to support both float and double variables
as input parameter. It checks on the size of the input variable
to branch to the float or double version.
Portability is an issue for this function which is present on
most Unixes but not all, under various libraries (C lib on BSD,
Math lib on Linux, sunmath on Solaris, ...). Integrating the
code for this function makes qfits independent from any math
library.
*/
/*----------------------------------------------------------------------------*/
#define qfits_isnan(n) ((sizeof(n)==sizeof(float)) ? _qfits_isnanf(n) : \
(sizeof(n)==sizeof(double)) ? _qfits_isnand(n) : -1)
/*----------------------------------------------------------------------------*/
/**
@brief Test a floating-point variable for Inf value.
@param n Number to test (float or double)
@return 1 if n is Inf or -Inf, 0 else.
This macro is needed to support both float and double variables
as input parameter. It checks on the size of the input variable
to branch to the float or double version.
Portability is an issue for this function which is missing on most
Unixes. Most of the time, another function called finite() is
offered to perform the opposite task, but it is not consistent
among platforms and found in various libraries. Integrating the
code for this function makes qfits independent from any math
library.
*/
/*----------------------------------------------------------------------------*/
#define qfits_isinf(n) ((sizeof(n)==sizeof(float)) ? _qfits_isinff(n) : \
(sizeof(n)==sizeof(double)) ? _qfits_isinfd(n) : -1)
/*-----------------------------------------------------------------------------
Function prototypes
-----------------------------------------------------------------------------*/
int _qfits_isnanf(float);
int _qfits_isinff(float);
int _qfits_isnand(double);
int _qfits_isinfd(double);
#endif
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