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// GetDP - Copyright (C) 1997-2018 P. Dular and C. Geuzaine, University of Liege
//
// See the LICENSE.txt file for license information. Please report all
// issues on https://gitlab.onelab.info/getdp/getdp/issues
#include <string.h>
#include "ProData.h"
#include "ListUtils.h"
#include "MallocUtils.h"
#include "Message.h"
extern int Flag_NETWORK_CACHE;
extern char *Name_Path ;
/* ------------------------------------------------------------------------ */
/* G e n e r a t e _ N e t w o r k */
/* ------------------------------------------------------------------------ */
/* Determination of the matrix 'Loop - Branch' from the matrix 'Node - Branch' */
struct ConstraintActive * Generate_Network(char *Name, List_T * ConstraintPerRegion_L)
{
/* List of the Nodes of the Network */
List_T *ListInt_L = List_Create(10, 10, sizeof(int)) ;
int Nbr_Branch = List_Nbr(ConstraintPerRegion_L) ;
if (!Nbr_Branch) Message::Error("No branch in Network") ;
struct ConstraintPerRegion * CPR ;
for (int j = 0 ; j < Nbr_Branch ; j++) {
CPR = (struct ConstraintPerRegion *)List_Pointer(ConstraintPerRegion_L, j) ;
List_Replace(ListInt_L, &(CPR->Case.Network.Node1), fcmp_int) ;
List_Replace(ListInt_L, &(CPR->Case.Network.Node2), fcmp_int) ;
}
if (Nbr_Branch) List_Sort(ListInt_L, fcmp_int) ;
int n = List_Nbr(ListInt_L) - 1 ; /* Nbr_Node - 1 */
int Nbr_Loop = Nbr_Branch - n ; /* Nbr of independent loops */
Message::Info("Network has %d branch(es), %d node(s) and %d loop(s)",
Nbr_Branch, n + 1, Nbr_Loop);
/* Active data */
struct ConstraintActive * Active =
(struct ConstraintActive *)Malloc(sizeof(struct ConstraintActive)) ;
Active->Case.Network.NbrNode = n ; Active->Case.Network.NbrBranch = Nbr_Branch ;
Active->Case.Network.NbrLoop = Nbr_Loop ;
int ** MatNode, ** MatLoop ;
Active->Case.Network.MatNode = MatNode = (int **)Malloc(n*sizeof(int *));
for (int i=0 ; i<n ; i++) MatNode[i] = (int *)Malloc(Nbr_Branch*sizeof(int)) ;
Active->Case.Network.MatLoop = MatLoop = (int **)Malloc(Nbr_Loop*sizeof(int *));
for (int i=0 ; i<Nbr_Loop ; i++){
MatLoop[i] = (int *)Malloc(Nbr_Branch*sizeof(int)) ;
for(int j = 0; j < Nbr_Branch; j++) MatLoop[i][j] = 0;
}
/* Fill matrix MatNode */
for (int i=0 ; i<n ; i++) for (int j=0 ; j<Nbr_Branch ; j++) MatNode[i][j] = 0 ;
for (int j = 0 ; j < Nbr_Branch ; j++) {
CPR = (struct ConstraintPerRegion*)List_Pointer(ConstraintPerRegion_L, j) ;
int i;
if ((i = List_ISearch(ListInt_L, &(CPR->Case.Network.Node1), fcmp_int)) > 0)
MatNode[i-1][j] = -1 ; /* skip index 0, i.e. node 1 */
if ((i = List_ISearch(ListInt_L, &(CPR->Case.Network.Node2), fcmp_int)) > 0)
MatNode[i-1][j] = 1 ;
}
/* Transformation of MatNode -> MatA ... Welsh algorithm */
int ** MatA = (int **)Malloc(n*sizeof(int *)) ;
for (int i=0 ; i<n ; i++) MatA[i] = (int *)Malloc(Nbr_Branch*sizeof(int)) ;
for (int i=0 ; i<n ; i++)
for (int j=0 ; j<Nbr_Branch ; j++) MatA[i][j] = MatNode[i][j] ;
int *Flag_row = (int *) Malloc(n * sizeof(int)) ;
int *Num_col = (int *) Malloc(Nbr_Branch * sizeof(int)) ;
for (int i=0 ; i<n ; i++) Flag_row[i] = 0 ;
int j_col1 = 0, j_col2 = n ;
for (int j=0 ; j<Nbr_Branch ; j++) {
int i = 0 ;
while ( i < n && (Flag_row[i] || MatA[i][j] == 0) ) { i++ ; } ;
if (i < n) {
Num_col[j_col1++] = j ; /* Column for the regular part of the matrix */
Flag_row[i] = 1 ;
int vi = MatA[i][j], vk ;
for (int k=0 ; k<n ; k++){
if ( k != i && (vk = MatA[k][j]) != 0 ){
for (int l=0 ; l<Nbr_Branch ; l++){
if (vk - vi == 0) MatA[k][l] -= MatA[i][l] ;
else if (vk + vi == 0) MatA[k][l] += MatA[i][l] ;
else Message::Error("Bad network") ;
}
}
}
}
else {
if (j_col2 < Nbr_Branch)
Num_col[j_col2++] = j ; /* Column for the complementary part of the matrix */
else Message::Error("Bad network") ;
}
}
/*
printf ("\nMatNode transformed:\n\n") ;
for (i=0 ; i<n ; i++) {
for (j=0 ; j<Nbr_Branch ; j++) printf ("%2d ", MatA[i][j]) ;
printf("\n") ;
}
printf("\nIndex columns (the first %d columns define a tree in the graph)\n", n) ;
for (j=0 ; j<Nbr_Branch ; j++) printf ("%2d ", Num_col[j]) ;
printf("\n\n") ;
*/
/* Matrix Loop - Branch */
char FileName[256];
strcpy(FileName, Name_Path);
strcat(FileName, Name);
strcat(FileName, ".cache");
if(Flag_NETWORK_CACHE){
FILE *fp = fopen(FileName, "r");
if(fp){
Message::Info("Reading network cache '%s'", FileName);
int n;
if(fscanf(fp, "%d", &n) != 1){
Message::Error("Bad cache file");
}
for(int l = 0; l < n; l++){
int i, j, val;
if(fscanf(fp, "%d %d %d", &i, &j, &val) != 3){
Message::Error("Bad cache file");
}
if(i < Nbr_Loop && j < Nbr_Branch)
MatLoop[i][j] = val;
else
Message::Error("Invalid network cache entry");
}
fclose(fp);
return Active ;
}
else{
Message::Info("Did not find network cache '%s': generating it", FileName);
}
}
Message::ResetProgressMeter();
int idx = 0;
//#pragma omp parallel for
for (int i=0 ; i<Nbr_Loop ; i++) {
int ni = Num_col[n+i];
for (int j=0 ; j<n ; j++) { /* rectangular part */
int nj = Num_col[j];
int a, b, vsum = 0 ;
for (int k=0 ; k<n ; k++){
if((a = MatA[k][ni]) && (b = MatA[k][nj])) vsum += a * b ;
}
MatLoop[i][nj] = -vsum ;
}
for (int j=0 ; j<Nbr_Loop ; j++) /* Unit matrix */
MatLoop[i][Num_col[n+j]] = (j == i)? 1 : 0 ;
Message::ProgressMeter(++idx, Nbr_Loop, "Processing (Generate Network)");
}
if(Flag_NETWORK_CACHE){
FILE *fp = fopen(FileName, "w");
if(fp){
int n = 0;
for(int i = 0; i < Nbr_Loop; i++){
for(int j = 0; j < Nbr_Branch; j++){
if(MatLoop[i][j]) n++;
}
}
fprintf(fp, "%d\n", n);
for(int i = 0; i < Nbr_Loop; i++){
for(int j = 0; j < Nbr_Branch; j++){
if(MatLoop[i][j]) fprintf(fp, "%d %d %d\n", i, j, MatLoop[i][j]);
}
}
fclose(fp);
}
else{
Message::Error("Could not create network cache '%s'", FileName);
}
}
return Active ;
}
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