prepare structure for R package

[valse.git] / src / adapters / EMGLLF_interface.c

diff --git a/src/adapters/EMGLLF_interface.c b/src/adapters/EMGLLF_interface.c
new file mode 100644 (file)
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+++ b/src/adapters/EMGLLF_interface.c
@@ -0,0 +1,125 @@
+#include "ioutils.h"
+#include "EMGLLF.h"
+#include <mex.h>
+
+// nlhs, nrhs: resp. numbers of out and in parameters.
+// plhs: array of out parameters, each being a mxArray
+// plhs: array of in parameters (immutable), each being a mxArray
+//
+// MATLAB translates a call [A,B] = fun(C,D) into mexFunction(2,{A,B},2,{C,D}). 
+// Then mxArrayS are adapted to be passed to a regular C function, 
+// and the results are translated back to mxArrayS into plhs.
+void mexFunction(
+       int nlhs, 
+       mxArray* plhs[], 
+       int nrhs, 
+       const mxArray* prhs[])
+{
+       // Basic sanity checks
+       if (nrhs!=11) 
+               mexErrMsgIdAndTxt("select:EMGLLF:nrhs","11 inputs required.");
+       if (nlhs!=5) 
+               mexErrMsgIdAndTxt("select:EMGLLF:nlhs","5 outputs required.");
+       
+       // Get matrices dimensions
+       const mwSize n = mxGetDimensions(prhs[8])[0];
+       const mwSize p = mxGetDimensions(prhs[0])[0];
+       const mwSize m = mxGetDimensions(prhs[0])[1];
+       const mwSize k = mxGetDimensions(prhs[0])[2];
+
+       ////////////
+       // INPUTS //
+       ////////////
+
+       // phiInit
+       const mwSize* dimPhiInit = mxGetDimensions(prhs[0]);
+       Real* brPhiInit = matlabToBrArray_real(mxGetPr(prhs[0]), dimPhiInit, 3);
+       
+       // rhoInit
+       const mwSize* dimRhoInit = mxGetDimensions(prhs[1]);
+       Real* brRhoInit = matlabToBrArray_real(mxGetPr(prhs[1]), dimRhoInit, 3);
+
+       // piInit
+       Real* piInit = mxGetPr(prhs[2]);
+
+       // gamInit
+       const mwSize* dimGamInit = mxGetDimensions(prhs[3]);
+       Real* brGamInit = matlabToBrArray_real(mxGetPr(prhs[3]), dimGamInit, 2);
+
+       // min number of iterations
+       Int mini = ((Int*)mxGetData(prhs[4]))[0];
+
+       // max number of iterations
+       Int maxi = ((Int*)mxGetData(prhs[5]))[0];
+
+       // gamma
+       Real gamma = mxGetScalar(prhs[6]);
+
+       // lambda
+       Real lambda = mxGetScalar(prhs[7]);
+
+       // X
+       const mwSize* dimX = mxGetDimensions(prhs[8]);
+       Real* brX = matlabToBrArray_real(mxGetPr(prhs[8]), dimX, 2);
+       
+       // Y
+       const mwSize* dimY = mxGetDimensions(prhs[9]);
+       Real* brY = matlabToBrArray_real(mxGetPr(prhs[9]), dimY, 2);
+       
+       // tau
+       Real tau = mxGetScalar(prhs[10]);
+
+       /////////////
+       // OUTPUTS //
+       /////////////
+
+       // phi
+       const mwSize dimPhi[] = {dimPhiInit[0], dimPhiInit[1], dimPhiInit[2]};
+       plhs[0] = mxCreateNumericArray(3,dimPhi,mxDOUBLE_CLASS,mxREAL);
+       Real* phi = mxGetPr(plhs[0]);
+
+       // rho
+       const mwSize dimRho[] = {dimRhoInit[0], dimRhoInit[1], dimRhoInit[2]};
+       plhs[1] = mxCreateNumericArray(3,dimRho,mxDOUBLE_CLASS,mxREAL);
+       Real* rho = mxGetPr(plhs[1]);
+
+       // pi
+       plhs[2] = mxCreateNumericMatrix(k,1,mxDOUBLE_CLASS,mxREAL);
+       Real* pi = mxGetPr(plhs[2]);
+
+       // LLF
+       plhs[3] = mxCreateNumericMatrix(maxi,1,mxDOUBLE_CLASS,mxREAL);
+       Real* LLF = mxGetPr(plhs[3]);
+
+       // S
+       const mwSize dimS[] = {p, m, k};
+    plhs[4] = mxCreateNumericArray(3,dimS,mxDOUBLE_CLASS,mxREAL);
+       Real* S = mxGetPr(plhs[4]);
+
+       ////////////////////
+       // Call to EMGLLF //
+       ////////////////////
+
+       EMGLLF(brPhiInit,brRhoInit,piInit,brGamInit,mini,maxi,gamma,lambda,brX,brY,tau,
+               phi,rho,pi,LLF,S,
+               n,p,m,k);
+       
+       free(brPhiInit);
+       free(brRhoInit);
+       free(brGamInit);
+       free(brX);
+       free(brY);
+       
+       //post-processing: convert by-rows outputs to MATLAB matrices
+       Real* mlPhi = brToMatlabArray_real(phi, dimPhi, 3);
+       copyArray(mlPhi, phi, dimPhi[0]*dimPhi[1]*dimPhi[2]);
+       free(mlPhi);
+       
+       Real* mlRho = brToMatlabArray_real(rho, dimRho, 3);
+       copyArray(mlRho, rho, dimRho[0]*dimRho[1]*dimRho[2]);
+       free(mlRho);
+    
+    Real* mlS = brToMatlabArray_real(S, dimS, 3);
+       copyArray(mlS, S, dimS[0]*dimS[1]*dimS[2]);
+       free(mlS);
+}