/* vim: set ts=4 sts=4 sw=4 noet : */
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#include<stdlib.h>
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#include "general.h"
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#include "cluster.h"
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#include <math.h>
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ts_cluster_list *init_cluster_list(){
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ts_cluster_list *cstlist=(ts_cluster_list *)malloc(sizeof(ts_cluster_list));
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cstlist->n=0;
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cstlist->cluster=NULL;
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return cstlist;
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}
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ts_cluster *new_cluster(ts_cluster_list *cstlist){
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cstlist->n++;
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cstlist->cluster=(ts_cluster **)realloc(cstlist->cluster,cstlist->n*sizeof(ts_cluster *));
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if(cstlist->cluster==NULL) fatal("Cannot reallocate memory for additional **ts_cluster.",100);
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cstlist->cluster[cstlist->n-1]=(ts_cluster *)calloc(1,sizeof(ts_cluster));
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if(cstlist->cluster[cstlist->n-1]==NULL) fatal("Cannot allocate memory for additional *ts_cluster.",100);
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return cstlist->cluster[cstlist->n-1];
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}
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ts_bool cluster_add_vertex(ts_cluster *cluster, ts_vertex *vtx){
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cluster->nvtx++;
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cluster->vtx=(ts_vertex **)realloc(cluster->vtx, cluster->nvtx*sizeof(ts_vertex *));
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cluster->vtx[cluster->nvtx-1]=vtx;
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vtx->cluster=cluster;
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return TS_SUCCESS;
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}
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ts_bool cluster_list_compact(ts_cluster_list *cstlist){
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ts_uint i,n=cstlist->n;
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for(i=0;i<cstlist->n;i++){
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if(cstlist->cluster[i]==NULL){
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if(i>=n) break;
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//printf("Have to do compacting n=%d\n ",n);
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do{
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n--;
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} while(cstlist->cluster[n]==NULL && n>i);
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cstlist->cluster[i]=cstlist->cluster[n];
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cstlist->cluster[n]=NULL;
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//printf("After compacting n=%d\n",n);
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}
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}
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cstlist->cluster=(ts_cluster **)realloc(cstlist->cluster,n*sizeof(ts_cluster *));
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cstlist->n=n;
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return TS_SUCCESS;
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}
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ts_bool cluster_join(ts_cluster_list *cstlist, ts_cluster *cluster1, ts_cluster *cluster2){
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ts_cluster *master_cluster,*slave_cluster;
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ts_uint i;
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if(cluster1->idx<cluster2->idx){
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master_cluster=cluster1;
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slave_cluster=cluster2;
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} else {
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master_cluster=cluster2;
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slave_cluster=cluster1;
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}
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for(i=0;i<slave_cluster->nvtx;i++){
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cluster_add_vertex(master_cluster,slave_cluster->vtx[i]);
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}
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//find cluster in the list and free the location of the cluster
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for(i=0;i<cstlist->n;i++){
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if(cstlist->cluster[i]==slave_cluster){
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cluster_free(slave_cluster);
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cstlist->cluster[i]=NULL;
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}
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}
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return TS_SUCCESS;
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}
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ts_bool cluster_free(ts_cluster *cluster){
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if(cluster!=NULL){
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if(cluster->vtx!=NULL)
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free(cluster->vtx);
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free(cluster);
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}
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return TS_SUCCESS;
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}
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ts_bool cluster_list_free(ts_cluster_list *cstlist){
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ts_uint i;
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if(cstlist!=NULL){
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for(i=0;i<cstlist->n;i++){
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cluster_free(cstlist->cluster[i]);
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}
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free(cstlist->cluster);
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free(cstlist);
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}
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return TS_SUCCESS;
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}
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/* This is a stub function. User should check whether the vertex is clustering or not. */
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ts_bool is_clusterable(ts_vertex *vtx){
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if(fabs(vtx->c)>1e-6){
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return 1;
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}
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else {
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return 0;
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}
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}
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ts_cluster *cluster_vertex_neighbor(ts_vertex *vtx){
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int j;
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for(j=0;j<vtx->neigh_no;j++){
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if(vtx->neigh[j]->cluster!=NULL)
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return vtx->neigh[j]->cluster;
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}
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return NULL;
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}
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ts_bool cluster_vertex_neighbor_check(ts_cluster_list *cstlist, ts_vertex *vtx){
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int j;
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for(j=0;j<vtx->neigh_no;j++){
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if(vtx->neigh[j]->cluster!=NULL){
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if(vtx->neigh[j]->cluster!=vtx->cluster){
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cluster_join(cstlist, vtx->cluster, vtx->neigh[j]->cluster);
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}
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}
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}
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return TS_SUCCESS;
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}
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ts_bool clusterize_vesicle(ts_vesicle *vesicle, ts_cluster_list *cstlist){
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int i;
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ts_vertex *vtx;
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ts_cluster *cst;
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for(i=0;i<vesicle->vlist->n;i++){
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//for each vertex
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vtx=vesicle->vlist->vtx[i];
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if(is_clusterable(vtx)){
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if(vtx->cluster==NULL){
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//find first neigbor with cluster index
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cst=cluster_vertex_neighbor(vtx);
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if(cst==NULL){
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//no clusters are around us, vo we are probably lonely vertex or no surronding vertex has been mapped yet.
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cst=new_cluster(cstlist);
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cluster_add_vertex(cst,vtx);
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} else {
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//we are added to the first cluster found
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cluster_add_vertex(cst,vtx);
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cluster_vertex_neighbor_check(cstlist, vtx);
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cluster_list_compact(cstlist);
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}
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}
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}
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}
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return TS_SUCCESS;
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}
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