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Diffstat (limited to 'ast/pal/palDrange.c')
-rw-r--r-- | ast/pal/palDrange.c | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/ast/pal/palDrange.c b/ast/pal/palDrange.c deleted file mode 100644 index 804ed55..0000000 --- a/ast/pal/palDrange.c +++ /dev/null @@ -1,77 +0,0 @@ -/* -*+ -* Name: -* palDrange - -* Purpose: -* Normalize angle into range +/- pi - -* Language: -* Starlink ANSI C - -* Type of Module: -* Library routine - -* Invocation: -* palDrange( double angle ) - -* Arguments: -* angle = double (Given) -* The angle in radians. - -* Description: -* The result is "angle" expressed in the range +/- pi. If the -* supplied value for "angle" is equal to +/- pi, it is returned -* unchanged. - -* Authors: -* DSB: David S Berry (JAC, Hawaii) -* PTW: Patrick T. Wallace -* {enter_new_authors_here} - -* History: -* 2012-05-09 (DSB): -* Initial version with documentation taken from Fortran SLA -* Adapted with permission from the Fortran SLALIB library. -* {enter_further_changes_here} - -* Copyright: -* Copyright (C) 1995 Rutherford Appleton Laboratory -* Copyright (C) 2012 Science and Technology Facilities Council. -* All Rights Reserved. - -* Licence: -* This program is free software: you can redistribute it and/or -* modify it under the terms of the GNU Lesser General Public -* License as published by the Free Software Foundation, either -* version 3 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 Lesser General Public License for more details. -* -* You should have received a copy of the GNU Lesser General -* License along with this program. If not, see -* <http://www.gnu.org/licenses/>. - -* Bugs: -* {note_any_bugs_here} -*- -*/ - -#include "pal.h" -#include "palmac.h" -#include <math.h> - -double palDrange( double angle ){ - double result = fmod( angle, PAL__D2PI ); - if( result > PAL__DPI ) { - result -= PAL__D2PI; - } else if( result < -PAL__DPI ) { - result += PAL__D2PI; - } - return result; -} - |