Daniel@0: /* C mex version of subv2ind*/
Daniel@0: /* 2 inputs, 1 output       */
Daniel@0: /* siz, subv                */
Daniel@0: /* ndx                      */
Daniel@0: #include "mex.h"
Daniel@0: 
Daniel@0: void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[]){
Daniel@0: 	int    i, j, k, nCol, nRow, binary, temp;
Daniel@0: 	double *pSize, *pSubv, *pr;
Daniel@0: 	int    *cumprod;
Daniel@0: 
Daniel@0: 	pSize = mxGetPr(prhs[0]);
Daniel@0: 	pSubv = mxGetPr(prhs[1]);
Daniel@0: 	nCol  = mxGetNumberOfElements(prhs[0]);
Daniel@0: 	nRow  = mxGetM(prhs[1]);
Daniel@0: 
Daniel@0: 	
Daniel@0: 	if(mxIsEmpty(prhs[1])){
Daniel@0: 		plhs[0] = mxCreateDoubleMatrix(0, 0, mxREAL);
Daniel@0: 		return;
Daniel@0: 	}
Daniel@0: 
Daniel@0: 	if(mxIsEmpty(prhs[0])){
Daniel@0: 		plhs[0] = mxCreateDoubleMatrix(1, 1, mxREAL);
Daniel@0: 		*mxGetPr(plhs[0]) = 1;
Daniel@0: 		return;
Daniel@0: 	}
Daniel@0: 
Daniel@0: 	binary = 2;
Daniel@0: 	for (i = 0; i < nCol; i++){
Daniel@0: 		if (pSize[i] > 2.0){
Daniel@0: 			binary = 0;
Daniel@0: 			break;
Daniel@0: 		}
Daniel@0: 		else if(pSize[i] == 1.0){
Daniel@0: 			binary = 1;
Daniel@0: 		}
Daniel@0: 	}
Daniel@0: 
Daniel@0: 	plhs[0] = mxCreateDoubleMatrix(nRow, 1, mxREAL);
Daniel@0: 	pr = mxGetPr(plhs[0]);
Daniel@0: 	for(i=0; i<nRow; i++){
Daniel@0: 		pr[i] = 1.0;
Daniel@0: 	}
Daniel@0: 
Daniel@0: 	if (binary == 2){
Daniel@0: 		for(j=0; j<nCol; j++){
Daniel@0: 			temp = j * nRow;
Daniel@0: 			for(i=0; i<nRow; i++){
Daniel@0: 				pr[i] += ((int)pSubv[temp + i] - 1) << j;
Daniel@0: 			}
Daniel@0: 		}
Daniel@0: 	}
Daniel@0: 	else if(binary == 1){	
Daniel@0: 		cumprod = malloc(nCol * sizeof(int));
Daniel@0: 		cumprod[0] = 1;
Daniel@0: 		for(i=1; i<nCol; i++){
Daniel@0: 			k = (int)pSize[i-1] - 1;
Daniel@0: 			cumprod[i] = cumprod[i-1] << k;
Daniel@0: 		}
Daniel@0: 		for(j=0; j<nCol; j++){
Daniel@0: 			temp = j * nRow;
Daniel@0: 			for(i=0; i<nRow; i++){
Daniel@0: 				k = (int)pSubv[temp + i] - 1;
Daniel@0: 				if(k)pr[i] += cumprod[j];
Daniel@0: 			}
Daniel@0: 		}
Daniel@0: 		free(cumprod);
Daniel@0: 	}
Daniel@0: 	else {
Daniel@0: 		cumprod = malloc(nCol * sizeof(int));
Daniel@0: 		cumprod[0] = 1;
Daniel@0: 		for(i=1; i<nCol; i++){
Daniel@0: 			k = (int)pSize[i-1];
Daniel@0: 			cumprod[i] = cumprod[i-1] * k;
Daniel@0: 		}
Daniel@0: 		for(j=0; j<nCol; j++){
Daniel@0: 			temp = j * nRow;
Daniel@0: 			for(i=0; i<nRow; i++){
Daniel@0: 				k = (int)pSubv[temp + i] - 1;
Daniel@0: 				pr[i] += cumprod[j] * k;
Daniel@0: 			}
Daniel@0: 		}
Daniel@0: 		free(cumprod);
Daniel@0: 	}
Daniel@0: }
Daniel@0: 
Daniel@0: 
Daniel@0: