Daniel@0: /* divide_by_table.c  ../potential/tables  */
Daniel@0: 
Daniel@0: 
Daniel@0: /******************************************/
Daniel@0: /* 6 input & 1 output                     */
Daniel@0: /* Big table    [0]                       */
Daniel@0: /* Big domain   [1]                       */
Daniel@0: /* big sizes    [2]                       */
Daniel@0: /* Small table  [3]                       */
Daniel@0: /* small domain [4]                       */
Daniel@0: /* small sizes  [5]                       */
Daniel@0: /*                                        */
Daniel@0: /* New big table[0]                       */
Daniel@0: /******************************************/
Daniel@0: 
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, count, NB, NS, siz_b, siz_s, ndim, temp;
Daniel@0: 	int     *mask, *sx, *sy, *cpsy, *subs, *s, *cpsy2;
Daniel@0: 	double  *pbDomain, *psDomain, *sp, *zp, *bs, value;
Daniel@0: 
Daniel@0: 	plhs[0] = mxDuplicateArray(prhs[0]);
Daniel@0: 	zp = mxGetPr(plhs[0]);
Daniel@0: 
Daniel@0: 	siz_b = mxGetNumberOfElements(prhs[1]);
Daniel@0: 	siz_s = mxGetNumberOfElements(prhs[4]);
Daniel@0: 	pbDomain = mxGetPr(prhs[1]);
Daniel@0: 	psDomain = mxGetPr(prhs[4]);
Daniel@0: 
Daniel@0: 	NB = mxGetNumberOfElements(prhs[0]);
Daniel@0: 	NS = mxGetNumberOfElements(prhs[3]);
Daniel@0: 	sp = mxGetPr(prhs[3]);
Daniel@0: 
Daniel@0: 	bs = mxGetPr(prhs[2]);
Daniel@0: 
Daniel@0: 	if(NS == 1){
Daniel@0: 		value = *sp;
Daniel@0: 		if(value == 0) value = 1;
Daniel@0: 		for(i=0; i<NB; i++){
Daniel@0: 			zp[i] /= value;
Daniel@0: 		}
Daniel@0: 		return;
Daniel@0: 	}
Daniel@0: 
Daniel@0: 	if(NS == NB){
Daniel@0: 		for(i=0; i<NB; i++){
Daniel@0: 			value = sp[i];
Daniel@0: 			if(value == 0) value = 1;
Daniel@0: 			zp[i] /= value;
Daniel@0: 		}
Daniel@0: 		return;
Daniel@0: 	}
Daniel@0: 
Daniel@0: 	mask = malloc(siz_s * sizeof(int));
Daniel@0: 	count = 0;
Daniel@0: 	for(i=0; i<siz_s; i++){
Daniel@0: 		for(j=0; j<siz_b; j++){
Daniel@0: 			if(psDomain[i] == pbDomain[j]){
Daniel@0: 				mask[count] = j;
Daniel@0: 				count++;
Daniel@0: 				break;
Daniel@0: 			}
Daniel@0: 		}
Daniel@0: 	}
Daniel@0: 	
Daniel@0: 	ndim = siz_b;
Daniel@0: 	sx = (int *)malloc(sizeof(int)*ndim);
Daniel@0: 	sy = (int *)malloc(sizeof(int)*ndim);
Daniel@0: 	for(i=0; i<ndim; i++){
Daniel@0: 		sx[i] = (int)bs[i];
Daniel@0: 		sy[i] = 1;
Daniel@0: 	}
Daniel@0: 	for(i=0; i<count; i++){
Daniel@0: 		temp = mask[i];
Daniel@0: 		sy[temp] = sx[temp];
Daniel@0: 	}
Daniel@0: 
Daniel@0: 	s = (int *)malloc(sizeof(int)*ndim);
Daniel@0: 	*(cpsy = (int *)malloc(sizeof(int)*ndim)) = 1;
Daniel@0: 	subs =   (int *)malloc(sizeof(int)*ndim);
Daniel@0: 	cpsy2 =  (int *)malloc(sizeof(int)*ndim);
Daniel@0: 	for(i = 0; i < ndim; i++){
Daniel@0: 		subs[i] = 0;
Daniel@0: 		s[i] = sx[i] - 1;
Daniel@0: 	}
Daniel@0: 			
Daniel@0: 	for(i = 0; i < ndim-1; i++){
Daniel@0: 		cpsy[i+1] = cpsy[i]*sy[i]--;
Daniel@0: 		cpsy2[i] = cpsy[i]*sy[i];
Daniel@0: 	}
Daniel@0: 	cpsy2[ndim-1] = cpsy[ndim-1]*(--sy[ndim-1]);
Daniel@0: 
Daniel@0: 	for(j=0; j<NB; j++){
Daniel@0: 		value = *sp;
Daniel@0: 		if(value == 0) value = 1;
Daniel@0: 		*zp++ /= value;
Daniel@0: 		for(i = 0; i < ndim; i++){
Daniel@0: 			if(subs[i] == s[i]){
Daniel@0: 				subs[i] = 0;
Daniel@0: 				if(sy[i])
Daniel@0: 					sp -= cpsy2[i];
Daniel@0: 			}
Daniel@0: 			else{
Daniel@0: 				subs[i]++;
Daniel@0: 				if(sy[i])
Daniel@0: 					sp += cpsy[i];
Daniel@0: 				break;
Daniel@0: 			}
Daniel@0: 		}
Daniel@0: 	}
Daniel@0: 	free(sx);
Daniel@0: 	free(sy);
Daniel@0: 	free(s);
Daniel@0: 	free(cpsy);
Daniel@0: 	free(subs);
Daniel@0: 	free(cpsy2);
Daniel@0:     free(mask);
Daniel@0: }
Daniel@0: