/*
    y = mJdetd(detd,K)
    yields length(y)=sum(K.q) vector with y[k] = -detd(k)*J,
    where J = [1, 0'; 0, -I].

    This file is part of SeDuMi 1.05 DEVELOPMENT
    Copyright (C) 2001 Jos F. Sturm
    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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/

#include "mex.h"
#include "blksdp.h"

#define Y_OUT plhs[0]
#define NPAROUT 1
#define DETD_IN prhs[0]
#define K_IN prhs[1]
#define NPARIN 2

/* ============================================================
   MAIN: MEXFUNCTION
   ============================================================ */
/* ************************************************************
   PROCEDURE mexFunction - Entry for Matlab
   y = mJdetd(detd,K)
   ************************************************************ */
void mexFunction(const int nlhs, mxArray *plhs[],
  const int nrhs, const mxArray *prhs[])
{
 int i,nexti,k;
 double detdk;
 double *y;
 const double *detd;
 coneK cK;

/* ------------------------------------------------------------
   Check for proper number of arguments 
   ------------------------------------------------------------ */
 if(nrhs < NPARIN)
   mexErrMsgTxt("mJdetd requires more input arguments.");
 if (nlhs > NPAROUT)
   mexErrMsgTxt("mJdetd generates 1 output argument.");
/* ------------------------------------------------------------
   Disassemble cone K structure
   ------------------------------------------------------------ */
 conepars(K_IN, &cK);
/* ------------------------------------------------------------
   Get input detd
   ------------------------------------------------------------ */
 if(mxGetM(DETD_IN) * mxGetN(DETD_IN) != cK.lorN)
   mexErrMsgTxt("detd size mismatch");
 detd = mxGetPr(DETD_IN);
/* ------------------------------------------------------------
   Allocate output y(qDim)
   ------------------------------------------------------------ */
 Y_OUT =  mxCreateDoubleMatrix(cK.qDim, 1, mxREAL);
 y = mxGetPr(Y_OUT);
/* ------------------------------------------------------------
   LORENTZ: yk = [-detd(k); detd(k)* ones(nk-1,1)]
   ------------------------------------------------------------ */
 i = 0;
 nexti = 0;
 for(k = 0; k < cK.lorN; k++){
   nexti += cK.lorNL[k];
   detdk = detd[k];
   y[i] = -detdk;
   for(++i; i < nexti; i++)
     y[i] = detdk;
 }
}
