tf2d.c

Go to the documentation of this file.

#include "erfa.h"
#include <stdlib.h>

int eraTf2d(char s, int ihour, int imin, double sec, double *days)
/*
**  - - - - - - - -
**   e r a T f 2 d
**  - - - - - - - -
**
**  Convert hours, minutes, seconds to days.
**
**  Given:
**     s         char    sign:  '-' = negative, otherwise positive
**     ihour     int     hours
**     imin      int     minutes
**     sec       double  seconds
**
**  Returned:
**     days      double  interval in days
**
**  Returned (function value):
**               int     status:  0 = OK
**                                1 = ihour outside range 0-23
**                                2 = imin outside range 0-59
**                                3 = sec outside range 0-59.999...
**
**  Notes:
**
**  1)  The result is computed even if any of the range checks fail.
**
**  2)  Negative ihour, imin and/or sec produce a warning status, but
**      the absolute value is used in the conversion.
**
**  3)  If there are multiple errors, the status value reflects only the
**      first, the smallest taking precedence.
**
**  Copyright (C) 2013-2015, NumFOCUS Foundation.
**  Derived, with permission, from the SOFA library.  See notes at end of file.
*/
{

/* Compute the interval. */
   *days  = ( s == '-' ? -1.0 : 1.0 ) *
            ( 60.0 * ( 60.0 * ( (double) abs(ihour) ) +
                              ( (double) abs(imin) ) ) +
                                         fabs(sec) ) / ERFA_DAYSEC;

/* Validate arguments and return status. */
   if ( ihour < 0 || ihour > 23 ) return 1;
   if ( imin < 0 || imin > 59 ) return 2;
   if ( sec < 0.0 || sec >= 60.0 ) return 3;
   return 0;

}
/*----------------------------------------------------------------------
**  
**  
**  Copyright (C) 2013-2015, NumFOCUS Foundation.
**  All rights reserved.
**  
**  This library is derived, with permission, from the International
**  Astronomical Union's "Standards of Fundamental Astronomy" library,
**  available from http://www.iausofa.org.
**  
**  The ERFA version is intended to retain identical functionality to
**  the SOFA library, but made distinct through different function and
**  file names, as set out in the SOFA license conditions.  The SOFA
**  original has a role as a reference standard for the IAU and IERS,
**  and consequently redistribution is permitted only in its unaltered
**  state.  The ERFA version is not subject to this restriction and
**  therefore can be included in distributions which do not support the
**  concept of "read only" software.
**  
**  Although the intent is to replicate the SOFA API (other than
**  replacement of prefix names) and results (with the exception of
**  bugs;  any that are discovered will be fixed), SOFA is not
**  responsible for any errors found in this version of the library.
**  
**  If you wish to acknowledge the SOFA heritage, please acknowledge
**  that you are using a library derived from SOFA, rather than SOFA
**  itself.
**  
**  
**  TERMS AND CONDITIONS
**  
**  Redistribution and use in source and binary forms, with or without
**  modification, are permitted provided that the following conditions
**  are met:
**  
**  1 Redistributions of source code must retain the above copyright
**    notice, this list of conditions and the following disclaimer.
**  
**  2 Redistributions in binary form must reproduce the above copyright
**    notice, this list of conditions and the following disclaimer in
**    the documentation and/or other materials provided with the
**    distribution.
**  
**  3 Neither the name of the Standards Of Fundamental Astronomy Board,
**    the International Astronomical Union nor the names of its
**    contributors may be used to endorse or promote products derived
**    from this software without specific prior written permission.
**  
**  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
**  "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
**  LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
**  FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
**  COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
**  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
**  BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
**  LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
**  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
**  LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
**  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
**  POSSIBILITY OF SUCH DAMAGE.
**  
*/