givens.h

/* ************************************************************
   HEADER givens.h
   For use with mex-files in self-dual-minimization package.

% This file is part of SeDuMi 1.1 by Imre Polik and Oleksandr Romanko
% Copyright (C) 2005 McMaster University, Hamilton, CANADA  (since 1.1)
%
% Copyright (C) 2001 Jos F. Sturm (up to 1.05R5)
%   Dept. Econometrics & O.R., Tilburg University, the Netherlands.
%   Supported by the Netherlands Organization for Scientific Research (NWO).
%
% Affiliation SeDuMi 1.03 and 1.04Beta (2000):
%   Dept. Quantitative Economics, Maastricht University, the Netherlands.
%
% Affiliations up to SeDuMi 1.02 (AUG1998):
%   CRL, McMaster University, Canada.
%   Supported by the Netherlands Organization for Scientific Research (NWO).
%
% This program is free software; you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation; either version 2 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 General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program; if not, write to the Free Software
% Foundation, Inc.,  51 Franklin Street, Fifth Floor, Boston, MA
% 02110-1301, USA


   ************************************************************ */

#if !defined(GIVENS_H)
#define GIVENS_H

#include "mex.h"

typedef struct{
  double x,y;} twodouble;

typedef struct{
  double x,xim,y;} tridouble;

void givensrot(double *z, const twodouble *g, const mwIndex n);
void givensrotuj(double *z, const twodouble *g, const mwIndex n);
void prpigivensrot(double *z, double *zpi, const tridouble *g, const mwIndex n);
void prpigivensrotuj(double *z, double *zpi, const tridouble *g, const mwIndex n);
#endif