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/* Setup.c */
#include "../Bridge.h"
/*--------------------------------------------------------------------*/
/*
-------------------------------------------------------------------
purpose --
given an InpMtx object that contains the structure of A, initialize
the bridge data structure for the serial factor's and solve's.
return value --
1 -- normal return
-1 -- bridge is NULL
-2 -- mtxA is NULL
created -- 98sep17, cca
-------------------------------------------------------------------
*/
int
Bridge_setup (
Bridge *bridge,
InpMtx *mtxA
) {
double t0, t1, t2 ;
ETree *frontETree ;
FILE *msgFile ;
Graph *graph ;
int compressed, msglvl, nedges, neqns, Neqns ;
IV *eqmapIV ;
IVL *adjIVL, *symbfacIVL ;
MARKTIME(t0) ;
/*
--------------------
check the input data
--------------------
*/
if ( bridge == NULL ) {
fprintf(stderr, "\n fatal error in Bridge_setup()"
"\n data is NULL\n") ;
return(-1) ;
}
if ( mtxA == NULL ) {
fprintf(stderr, "\n fatal error in Bridge_setup()"
"\n A is NULL\n") ;
return(-2) ;
}
msglvl = bridge->msglvl ;
msgFile = bridge->msgFile ;
neqns = bridge->neqns ;
if ( ! (INPMTX_IS_BY_ROWS(mtxA) || INPMTX_IS_BY_COLUMNS(mtxA)) ) {
/*
------------------------------
change coordinate type to rows
------------------------------
*/
InpMtx_changeCoordType(mtxA, INPMTX_BY_ROWS) ;
}
if ( ! INPMTX_IS_BY_VECTORS(mtxA) ) {
/*
------------------------------
change storage mode to vectors
------------------------------
*/
InpMtx_changeStorageMode(mtxA, INPMTX_BY_VECTORS) ;
}
/*
---------------------------
create a Graph object for A
---------------------------
*/
MARKTIME(t1) ;
graph = Graph_new() ;
adjIVL = InpMtx_fullAdjacency(mtxA);
nedges = bridge->nedges = IVL_tsize(adjIVL),
Graph_init2(graph, 0, neqns, 0, nedges,
neqns, nedges, adjIVL, NULL, NULL) ;
MARKTIME(t2) ;
bridge->cpus[0] += t2 - t1 ;
if ( msglvl > 1 ) {
fprintf(msgFile, "\n CPU %8.3f : time to create Graph", t2 - t1) ;
fflush(msgFile) ;
}
if ( msglvl > 3 ) {
fprintf(msgFile, "\n\n graph of the input matrix") ;
Graph_writeForHumanEye(graph, msgFile) ;
fflush(msgFile) ;
}
/*
-----------------------
get the equivalence map
-----------------------
*/
MARKTIME(t1) ;
eqmapIV = Graph_equivMap(graph) ;
Neqns = bridge->Neqns = 1 + IV_max(eqmapIV) ;
if ( msglvl > 2 ) {
fprintf(msgFile, "\n\n graph's equivalence map") ;
IV_writeForHumanEye(eqmapIV, msgFile) ;
fflush(msgFile) ;
}
if ( Neqns < bridge->compressCutoff * neqns ) {
Graph *cgraph ;
/*
------------------
compress the graph
------------------
*/
cgraph = Graph_compress2(graph, eqmapIV, 1) ;
Graph_free(graph) ;
graph = cgraph ;
compressed = 1 ;
bridge->Nedges = graph->nedges ;
} else {
compressed = 0 ;
}
MARKTIME(t2) ;
bridge->cpus[1] += t2 - t1 ;
if ( msglvl > 1 ) {
fprintf(msgFile, "\n CPU %8.3f : time to create compressed graph",
t2 - t1) ;
fflush(msgFile) ;
}
if ( msglvl > 3 ) {
fprintf(msgFile, "\n\n graph to order") ;
Graph_writeForHumanEye(graph, msgFile) ;
fflush(msgFile) ;
}
/*
---------------
order the graph
---------------
*/
MARKTIME(t1) ;
if ( bridge->maxdomainsize <= 0 ) {
bridge->maxdomainsize = neqns/32 ;
}
if ( bridge->maxdomainsize <= 0 ) {
bridge->maxdomainsize = 1 ;
}
if ( bridge->maxnzeros < 0 ) {
bridge->maxnzeros = 0.01*neqns ;
}
if ( bridge->maxsize < 0 ) {
bridge->maxsize = neqns ;
}
frontETree = orderViaBestOfNDandMS(graph, bridge->maxdomainsize,
bridge->maxnzeros, bridge->maxsize,
bridge->seed, msglvl, msgFile) ;
bridge->frontETree = frontETree ;
MARKTIME(t2) ;
bridge->cpus[2] += t2 - t1 ;
if ( msglvl > 1 ) {
fprintf(msgFile, "\n CPU %8.3f : time to order graph", t2 - t1) ;
fflush(msgFile) ;
}
if ( msglvl > 3 ) {
fprintf(msgFile, "\n\n front tree from ordering") ;
ETree_writeForHumanEye(bridge->frontETree, msgFile) ;
fflush(msgFile) ;
}
MARKTIME(t1) ;
if ( compressed == 1 ) {
ETree *etree ;
IVL *tempIVL ;
/*
----------------------------------------------------------
compute the symbolic factorization of the compressed graph
----------------------------------------------------------
*/
tempIVL = SymbFac_initFromGraph(frontETree, graph) ;
/*
-------------------------------------------------------
expand the symbolic factorization to the original graph
-------------------------------------------------------
*/
symbfacIVL = IVL_expand(tempIVL, eqmapIV) ;
IVL_free(tempIVL) ;
/*
---------------------
expand the front tree
---------------------
*/
etree = ETree_expand(frontETree, eqmapIV) ;
ETree_free(frontETree) ;
frontETree = etree ;
} else {
/*
--------------------------------------------------------
compute the symbolic factorization of the original graph
--------------------------------------------------------
*/
symbfacIVL = SymbFac_initFromGraph(frontETree, graph) ;
}
MARKTIME(t2) ;
bridge->frontETree = frontETree ;
bridge->symbfacIVL = symbfacIVL ;
/*
----------------------------------------------
get the old-to-new and new-to-old permutations
----------------------------------------------
*/
bridge->oldToNewIV = ETree_oldToNewVtxPerm(frontETree) ;
bridge->newToOldIV = ETree_newToOldVtxPerm(frontETree) ;
if ( msglvl > 2 ) {
fprintf(msgFile, "\n\n old-to-new permutation") ;
IV_writeForHumanEye(bridge->oldToNewIV, msgFile) ;
fprintf(msgFile, "\n\n new-to-old permutation") ;
IV_writeForHumanEye(bridge->newToOldIV, msgFile) ;
fflush(msgFile) ;
}
/*
------------------------------------------------------
overwrite the symbolic factorization with the permuted
indices and sort the lists into ascending order
------------------------------------------------------
*/
IVL_overwrite(symbfacIVL, bridge->oldToNewIV) ;
IVL_sortUp(symbfacIVL) ;
if ( msglvl > 2 ) {
fprintf(msgFile, "\n\n symbolic factorization") ;
IVL_writeForHumanEye(symbfacIVL, msgFile) ;
fflush(msgFile) ;
}
/*
--------------------------------------
permute the vertices in the front tree
--------------------------------------
*/
ETree_permuteVertices(frontETree, bridge->oldToNewIV) ;
if ( msglvl > 2 ) {
fprintf(msgFile, "\n\n permuted front etree") ;
ETree_writeForHumanEye(frontETree, msgFile) ;
fflush(msgFile) ;
}
MARKTIME(t2) ;
bridge->cpus[3] += t2 - t1 ;
if ( msglvl > 1 ) {
fprintf(msgFile, "\n CPU %8.3f : time for symbolic factorization",
t2 - t1) ;
fflush(msgFile) ;
}
/*
------------------------
free the working storage
------------------------
*/
Graph_free(graph) ;
IV_free(eqmapIV) ;
MARKTIME(t2) ;
bridge->cpus[4] += t2 - t0 ;
return(1) ; }
/*--------------------------------------------------------------------*/
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