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mJdetd.c
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Mon, Jul 14, 19:31

mJdetd.c
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/*
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 1.1 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
*/
#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[])
{
mwIndex 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;
}
}

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