/* fourier.c: Test program to call the cdd library cddlib written by Komei Fukuda, fukuda@ifor.math.ethz.ch Version 0.94, August 4, 2005 Standard ftp site: ftp.ifor.math.ethz.ch, Directory: pub/fukuda/cdd */ /* This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include "setoper.h" #include "cdd.h" #include <stdio.h> #include <stdlib.h> #include <time.h> #include <math.h> #include <string.h> dd_boolean SetInputFile(FILE **f, dd_DataFileType fname) { dd_boolean success=dd_FALSE; success=dd_FALSE; if ( ( *f = fopen(fname, "r") )!= NULL) { printf("input file %s is open\n", fname); success=dd_TRUE; } else{ printf("The input file %s not found\n",fname); } return success; } dd_boolean SetWriteFile(FILE **f, dd_DataFileType fname) { dd_boolean success=dd_FALSE; if ( (*f = fopen(fname, "w")) != NULL){ printf("output file %s is open\n",fname); success=dd_TRUE; } else{ printf("The output file %s cannot be opened\n",fname); } return success; } int main(int argc, char *argv[]) { dd_MatrixPtr M=NULL,M1=NULL,M2=NULL; dd_colrange j,s,d; dd_ErrorType err=dd_NoError; dd_rowset redset,impl_linset; dd_rowindex newpos; mytype val; dd_DataFileType inputfile; FILE *reading=NULL; dd_set_global_constants(); /* First, this must be called. */ dd_init(val); if (argc>1) strcpy(inputfile,argv[1]); if (argc<=1 || !SetInputFile(&reading,argv[1])){ dd_WriteProgramDescription(stdout); fprintf(stdout,"\ncddlib test program to apply Fourier's Elimination to an H-polyhedron.\n"); dd_SetInputFile(&reading,inputfile, &err); } if (err==dd_NoError) { M=dd_PolyFile2Matrix(reading, &err); } else { fprintf(stderr,"Input file not found\n"); goto _L99; } if (err!=dd_NoError) goto _L99; d=M->colsize; M2=dd_CopyMatrix(M); printf("How many variables to elminate? (max %ld): ",d-1); scanf("%ld",&s); if (s>0 && s < d){ for (j=1; j<=s; j++){ M1=dd_FourierElimination(M2, &err); printf("\nRemove the variable %ld. The resulting redundant system.\n",j); dd_WriteMatrix(stdout, M1); dd_MatrixCanonicalize(&M1, &impl_linset, &redset, &newpos, &err); if (err!=dd_NoError) goto _L99; fprintf(stdout, "\nRedundant rows: "); set_fwrite(stdout, redset); dd_FreeMatrix(M2); M2=M1; set_free(redset); set_free(impl_linset); free(newpos); } printf("\nNonredundant representation:\n"); dd_WriteMatrix(stdout, M1); } else { printf("Value out of range\n"); } dd_FreeMatrix(M); dd_FreeMatrix(M1); dd_clear(val); _L99:; /* if (err!=dd_NoError) dd_WriteErrorMessages(stderr,err); */ dd_free_global_constants(); /* At the end, this should be called. */ return 0; } /* end of fourier.c */