1 files changed, 111 insertions, 0 deletions
diff --git a/ast/erfa/pvdpv.c b/ast/erfa/pvdpv.c
new file mode 100644
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+++ b/ast/erfa/pvdpv.c
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+#include "erfa.h"
+
+void eraPvdpv(double a[2][3], double b[2][3], double adb[2])
+/*
+**  - - - - - - - - -
+**   e r a P v d p v
+**  - - - - - - - - -
+**
+**  Inner (=scalar=dot) product of two pv-vectors.
+**
+**  Given:
+**     a        double[2][3]      first pv-vector
+**     b        double[2][3]      second pv-vector
+**
+**  Returned:
+**     adb      double[2]         a . b (see note)
+**
+**  Note:
+**
+**     If the position and velocity components of the two pv-vectors are
+**     ( ap, av ) and ( bp, bv ), the result, a . b, is the pair of
+**     numbers ( ap . bp , ap . bv + av . bp ).  The two numbers are the
+**     dot-product of the two p-vectors and its derivative.
+**
+**  Called:
+**     eraPdp       scalar product of two p-vectors
+**
+**  Copyright (C) 2013-2014, NumFOCUS Foundation.
+**  Derived, with permission, from the SOFA library.  See notes at end of file.
+*/
+{
+   double adbd, addb;
+
+
+/* a . b = constant part of result. */
+   adb[0] = eraPdp(a[0], b[0]);
+
+/* a . bdot */
+   adbd = eraPdp(a[0], b[1]);
+
+/* adot . b */
+   addb = eraPdp(a[1], b[0]);
+
+/* Velocity part of result. */
+   adb[1] = adbd + addb;
+
+   return;
+
+}
+/*----------------------------------------------------------------------
+**  
+**  
+**  Copyright (C) 2013-2014, 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.
+**  
+*/