text: #include "sofam.h"
  
  void iauPpsp(double a[3], double s, double b[3], double apsb[3])
  /*
  **  - - - - - - - -
  **   i a u P p s p
  **  - - - - - - - -
  **
  **  P-vector plus scaled p-vector.
  **
  **  This function is part of the International Astronomical Union's
  **  SOFA (Standards Of Fundamental Astronomy) software collection.
  **
  **  Status:  vector/matrix support function.
  **
  **  Given:
  **     a      double[3]     first p-vector
  **     s      double        scalar (multiplier for b)
  **     b      double[3]     second p-vector
  **
  **  Returned:
  **     apsb   double[3]     a + s*b
  **
  **  Note:
  **     It is permissible for any of a, b and apsb to be the same array.
  **
  **  Called:
  **     iauSxp       multiply p-vector by scalar
  **     iauPpp       p-vector plus p-vector
  **
  **  This revision:  2008 November 18
  **
  **  SOFA release 2010-12-01
  **
  **  Copyright (C) 2010 IAU SOFA Board.  See notes at end.
  */
  {
     double sb[3];
  
  
  /* s*b. */
     iauSxp(s, b, sb);
  
  /* a + s*b. */
     iauPpp(a, sb, apsb);
  
     return;
  
  /*----------------------------------------------------------------------
  **
  **  Copyright (C) 2010
  **  Standards Of Fundamental Astronomy Board
  **  of the International Astronomical Union.
  **
  **  =====================
  **  SOFA Software License
  **  =====================
  **
  **  NOTICE TO USER:
  **
  **  BY USING THIS SOFTWARE YOU ACCEPT THE FOLLOWING TERMS AND CONDITIONS
  **  WHICH APPLY TO ITS USE.
  **
  **  1. The Software is owned by the IAU SOFA Board ("SOFA").
  **
  **  2. Permission is granted to anyone to use the SOFA software for any
  **     purpose, including commercial applications, free of charge and
  **     without payment of royalties, subject to the conditions and
  **     restrictions listed below.
  **
  **  3. You (the user) may copy and distribute SOFA source code to others,
  **     and use and adapt its code and algorithms in your own software,
  **     on a world-wide, royalty-free basis.  That portion of your
  **     distribution that does not consist of intact and unchanged copies
  **     of SOFA source code files is a "derived work" that must comply
  **     with the following requirements:
  **
  **     a) Your work shall be marked or carry a statement that it
  **        (i) uses routines and computations derived by you from
  **        software provided by SOFA under license to you; and
  **        (ii) does not itself constitute software provided by and/or
  **        endorsed by SOFA.
  **
  **     b) The source code of your derived work must contain descriptions
  **        of how the derived work is based upon, contains and/or differs
  **        from the original SOFA software.
  **
  **     c) The name(s) of all routine(s) in your derived work shall not
  **        include the prefix "iau".
  **
  **     d) The origin of the SOFA components of your derived work must
  **        not be misrepresented;  you must not claim that you wrote the
  **        original software, nor file a patent application for SOFA
  **        software or algorithms embedded in the SOFA software.
  **
  **     e) These requirements must be reproduced intact in any source
  **        distribution and shall apply to anyone to whom you have
  **        granted a further right to modify the source code of your
  **        derived work.
  **
  **     Note that, as originally distributed, the SOFA software is
  **     intended to be a definitive implementation of the IAU standards,
  **     and consequently third-party modifications are discouraged.  All
  **     variations, no matter how minor, must be explicitly marked as
  **     such, as explained above.
  **
  **  4. In any published work or commercial products which includes
  **     results achieved by using the SOFA software, you shall
  **     acknowledge that the SOFA software was used in obtaining those
  **     results.
  **
  **  5. You shall not cause the SOFA software to be brought into
  **     disrepute, either by misuse, or use for inappropriate tasks, or
  **     by inappropriate modification.
  **
  **  6. The SOFA software is provided "as is" and SOFA makes no warranty
  **     as to its use or performance.   SOFA does not and cannot warrant
  **     the performance or results which the user may obtain by using the
  **     SOFA software.  SOFA makes no warranties, express or implied, as
  **     to non-infringement of third party rights, merchantability, or
  **     fitness for any particular purpose.  In no event will SOFA be
  **     liable to the user for any consequential, incidental, or special
  **     damages, including any lost profits or lost savings, even if a
  **     SOFA representative has been advised of such damages, or for any
  **     claim by any third party.
  **
  **  7. The provision of any version of the SOFA software under the terms
  **     and conditions specified herein does not imply that future
  **     versions will also be made available under the same terms and
  **     conditions.
  **
  **  Correspondence concerning SOFA software should be addressed as
  **  follows:
  **
  **      By email:  sofa@ukho.gov.uk
  **      By post:   IAU SOFA Center
  **                 HM Nautical Almanac Office
  **                 UK Hydrographic Office
  **                 Admiralty Way, Taunton
  **                 Somerset, TA1 2DN
  **                 United Kingdom
  **
  **--------------------------------------------------------------------*/
  }
  