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Diffstat (limited to 'time/gm_sidereal.c')
-rw-r--r-- | time/gm_sidereal.c | 60 |
1 files changed, 0 insertions, 60 deletions
diff --git a/time/gm_sidereal.c b/time/gm_sidereal.c deleted file mode 100644 index b0984aa..0000000 --- a/time/gm_sidereal.c +++ /dev/null @@ -1,60 +0,0 @@ -/* - * (C)2012 Michael Duane Rice All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are - * met: - * - * Redistributions of source code must retain the above copyright notice, this - * list of conditions and the following disclaimer. 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. Neither the name of the copyright holders - * nor the names of 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 OWNER 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. - */ - -/* $Id: gm_sidereal.c 2369 2013-04-28 14:19:35Z swfltek $ */ - -/* - Greenwich Mean Sidereal Time. A sidereal second is somewhat shorter than a standard second, - about 1.002737909350795 sidereal seconds per standard second. - - We resort to fixed point math due to the insufficient resolution of a 'double', using... - - timestamp * ( 1.002737909350795 << 31 ) - --------------------------------------- + Te - 1 << 31 - - Where Te is the sidereal time at the epoch. - -*/ - -#include <time.h> -#include <stdint.h> - -unsigned long -gm_sidereal(const time_t * timer) -{ - uint64_t tmp; - - tmp = *timer; - tmp *= 0x8059B740; - tmp /= 0x80000000; - tmp += (uint64_t) 23991; - - tmp %= ONE_DAY; - return tmp; -} |