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/* makeGraph.c */
#include "../InpMtx.h"
#include "../../Graph.h"
#include "../../timings.h"
/*--------------------------------------------------------------------*/
int
main ( int argc, char *argv[] )
/*
-------------------------------------
read in an adjacency structure file
and create a unit weight Graph object
nvtx nadj
offsets[nvtx+1]
indices[nadj]
created -- 96nov15, cca
-------------------------------------
*/
{
InpMtx *inpmtx ;
double t1, t2 ;
int flag, ierr, ii, msglvl, nadj, nvtx, rc, v, vsize ;
int *adjncy, *offsets, *vadj ;
Graph *graph ;
FILE *fp, *msgFile ;
if ( argc != 6 ) {
fprintf(stdout,
"\n\n usage : %s msglvl msgFile inAdjacencyFile outGraphFile flag"
"\n msglvl -- message level"
"\n msgFile -- message file"
"\n inAdjacencyFile -- input file"
"\n outGraphFile -- output file, must be *.graphf or *.graphb"
"\n flag -- flag for 0-based or 1-based addressing"
"\n", argv[0]) ;
return(0) ;
}
msglvl = atoi(argv[1]) ;
if ( strcmp(argv[2], "stdout") == 0 ) {
msgFile = stdout ;
} else if ( (msgFile = fopen(argv[2], "a")) == NULL ) {
fprintf(stderr, "\n fatal error in %s"
"\n unable to open file %s\n",
argv[0], argv[2]) ;
return(-1) ;
}
flag = atoi(argv[5]) ;
if ( flag < 0 || flag > 1 ) {
fprintf(stderr, "\n fatal error in makeGraph %d %s %s %s %d"
"\n flag must be 0 if indices and offsets are zero-based like C"
"\n flag must be 1 if indices and offsets are one-based like Fortran"
"\n", msglvl, argv[2], argv[3], argv[4], flag) ;
exit(-1) ;
}
fprintf(msgFile,
"\n %s "
"\n msglvl -- %d"
"\n msgFile -- %s"
"\n inFile -- %s"
"\n outFile -- %s"
"\n flag -- %d"
"\n",
argv[0], msglvl, argv[2], argv[3], argv[4], flag) ;
fflush(msgFile) ;
/*
-------------------
open the input file
-------------------
*/
if ( (fp = fopen(argv[3], "r")) == NULL ) {
fprintf(stderr, "\n fatal error in %s"
"\n unable to open file %s\n", argv[0], argv[3]) ;
return(-1) ;
}
/*
-------------------------------------------------
read in the number of vertices and adjacency size
-------------------------------------------------
*/
if ( (rc = fscanf(fp, " %d %d", &nvtx, &nadj)) != 2 ) {
fprintf(stderr, "\n fatal error in %s"
"\n %d of %d items read\n", argv[0], rc, 2) ;
exit(-1) ;
}
if ( msglvl > 0 ) {
fprintf(msgFile, "\n adjacency file has %d vertices and %d indices",
nvtx, nadj) ;
fflush(msgFile) ;
}
/*
-------------------
read in the offsets
-------------------
*/
offsets = IVinit(nvtx + 1, -1) ;
rc = IVfscanf(fp, nvtx + 1, offsets) ;
if ( rc != nvtx + 1 ) {
fprintf(stderr, "\n fatal error in %s reading offsets"
"\n %d of %d items read\n",
argv[0], rc, nvtx + 1) ;
exit(-1) ;
}
if ( flag == 1 ) {
/*
---------------------------------------------
decrement the offsets by one for C addressing
---------------------------------------------
*/
for ( ii = 0 ; ii < nvtx + 1 ; ii++ ) {
offsets[ii]-- ;
}
}
if ( msglvl > 3 ) {
fprintf(msgFile, "\n offsets") ;
IVfp80(msgFile, nvtx+1, offsets, 80, &ierr) ;
fflush(msgFile) ;
}
/*
---------------------
read in the adjacency
---------------------
*/
adjncy = IVinit(nadj, -1) ;
rc = IVfscanf(fp, nadj, adjncy) ;
if ( rc != nadj ) {
fprintf(stderr, "\n fatal error in %s reading adjncy"
"\n %d of %d items read\n",
argv[0], rc, nadj) ;
exit(-1) ;
}
if ( flag == 1 ) {
/*
---------------------------------------------
decrement the offsets by one for C addressing
---------------------------------------------
*/
for ( ii = 0 ; ii < nadj ; ii++ ) {
adjncy[ii]-- ;
}
}
if ( msglvl > 3 ) {
fprintf(msgFile, "\n adjncy") ;
IVfp80(msgFile, nadj, adjncy, 80, &ierr) ;
fflush(msgFile) ;
}
/*
-----------------------------------------------
check the adjacency structure for valid entries
-----------------------------------------------
*/
for ( ii = 0 ; ii < nadj ; ii++ ) {
v = adjncy[ii] ;
if ( v < 0 || v >= nvtx ) {
fprintf(stderr, "\n fatal error in mkGraph"
"\n adjncy[%d] = %d, out of range in [0,%d]"
"\n ", ii, v, nvtx-1) ;
exit(-1) ;
}
}
if ( msglvl > 3 ) {
fprintf(msgFile, "\n adjncy") ;
IVfp80(msgFile, nadj, adjncy, 80, &ierr) ;
fflush(msgFile) ;
}
/*
-------------------------
set up the InpMtx object
-------------------------
*/
inpmtx = InpMtx_new() ;
InpMtx_init(inpmtx, INPMTX_BY_ROWS, INPMTX_INDICES_ONLY,
nvtx + 2*nadj, nvtx) ;
for ( v = 0 ; v < nvtx ; v++ ) {
InpMtx_inputEntry(inpmtx, v, v) ;
if ( msglvl > 3 ) {
fprintf(msgFile, "\n inputting entry (%d,%d)", v, v) ;
fflush(msgFile) ;
}
vsize = offsets[v+1] - offsets[v] ;
vadj = &adjncy[offsets[v]] ;
if ( msglvl > 3 ) {
fprintf(msgFile, "\n inputting row %d :", v) ;
IVfp80(msgFile, vsize, vadj, 22, &ierr) ;
fflush(msgFile) ;
}
InpMtx_inputRow(inpmtx, v, vsize, vadj) ;
if ( msglvl > 3 ) {
fprintf(msgFile, "\n inputting column %d :", v) ;
IVfp80(msgFile, vsize, vadj, 22, &ierr) ;
fflush(msgFile) ;
}
InpMtx_inputColumn(inpmtx, v, vsize, vadj) ;
}
if ( msglvl > 2 ) {
fprintf(msgFile, "\n raw data") ;
InpMtx_writeForHumanEye(inpmtx, msgFile) ;
}
InpMtx_changeStorageMode(inpmtx, INPMTX_BY_VECTORS) ;
if ( msglvl > 2 ) {
fprintf(msgFile, "\n after changing to vector storage mode") ;
InpMtx_writeForHumanEye(inpmtx, msgFile) ;
}
/*
-----------------------------------
free the offsets and adjncy vectors
-----------------------------------
*/
IVfree(offsets) ;
IVfree(adjncy) ;
/*
---------------------------
initialize the Graph object
---------------------------
*/
offsets = IVinit(nvtx + 1, -1) ;
IVcopy(nvtx, offsets, IV_entries(&inpmtx->offsetsIV)) ;
offsets[nvtx] = inpmtx->nent ;
adjncy = IV_entries(&inpmtx->ivec2IV) ;
graph = Graph_new() ;
Graph_fillFromOffsets(graph, nvtx, offsets, adjncy, 0) ;
graph->type = 0 ;
graph->totvwght = nvtx ;
if ( msglvl > 0 ) {
fprintf(msgFile, "\n graph has %d vertices and %d edges",
graph->nvtx, graph->nedges) ;
fflush(msgFile) ;
}
if ( msglvl > 2 ) {
Graph_writeForHumanEye(graph, msgFile) ;
}
/*
--------------------------
write out the Graph object
--------------------------
*/
if ( strcmp(argv[4], "none") != 0 ) {
MARKTIME(t1) ;
rc = Graph_writeToFile(graph, argv[4]) ;
MARKTIME(t2) ;
fprintf(msgFile, "\n CPU %9.5f : write graph to file %s",
t2 - t1, argv[4]) ;
}
if ( rc != 1 ) {
fprintf(msgFile, "\n return value %d from Graph_writeToFile(%p,%s)",
rc, graph, argv[4]) ;
}
/*
---------------------------------
free the Graph and InpMtx object
---------------------------------
*/
Graph_free(graph) ;
InpMtx_free(inpmtx) ;
IVfree(offsets) ;
fprintf(msgFile, "\n") ;
fclose(msgFile) ;
return(1) ; }
/*--------------------------------------------------------------------*/
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