/* uniqtest.c: Test program to call the cdd library cddlib
   written by Komei Fukuda, fukuda@ifor.math.ethz.ch
   Version 0.93c, Nov. 14, 2003
   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_rowrange i;
  dd_colrange d;
  dd_ErrorType err=dd_NoError;
  dd_rowset redrows,linrows,posset;
  dd_rowindex newpos=NULL, newpos1=NULL, newpos2=NULL;
  mytype val;
  dd_DataFileType inputfile;
  FILE *reading=NULL;
  int foi;
  dd_Arow certificate;

  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 remove duplicates.\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;
  
  /* 
  printf("\nInput Matrix.\n");
  dd_WriteMatrix(stdout, M); 
  */
 
  M1=dd_MatrixSortedUniqueCopy(M,&newpos1);
  printf("\nSort and remove duplicates with dd_MatrixSortedUniqueCopy.\n");
  printf(" Row index changes -- original:new\n");
  for (i=1;i<=M->rowsize; i++){
    printf(" %ld:%ld",i,newpos1[i]);
  }
  printf("\n");
  /* dd_WriteMatrix(stdout, M1); */

  dd_InitializeArow(M1->colsize+2, &certificate);
  fprintf(stdout, "\nCheck whether the system contains an implicit linearity.\n");
  foi=dd_FreeOfImplicitLinearity(M1, certificate, &posset, &err);
  switch (foi) {
    case 1:
         fprintf(stdout, "  It is free of implicit linearity.\n");
      break;
      
    case 0:
         fprintf(stdout, "  It is not free of implicit linearity.\n");
      break;

    case -1:
         fprintf(stdout, "  The input system is trivial (i.e. the empty H-polytope or the V-rep of the whole space.\n");
      break;
  }


  fprintf(stdout, "\nOne can then remove nontrivial redundant rows with dd_RedundantRows.\n Redundant rows:\n");
  redrows=dd_RedundantRowsWithPresorting(M1, &err);
  /* redrows=dd_RedundantRows(M1, &err);  */
  set_fwrite(stdout, redrows);
  printf("\n");

  M2=dd_MatrixSubmatrix2(M1, redrows, &newpos);
  dd_FreeMatrix(M1);
  set_free(redrows);
  free(newpos);
  
  fprintf(stdout, " Implicit linearity (after removal of redundant rows): ");
  linrows=dd_ImplicitLinearityRows(M2, &err);

  if (M->representation==dd_Generator)
    fprintf(stdout," %ld  ", set_card(linrows));
  else 
    fprintf(stdout," %ld  ", set_card(linrows));
  set_fwrite(stdout,linrows);
  set_uni(M2->linset, M2->linset, linrows); 
    /* add the implicit linrows to the given linearity rows */

  printf("\nNonredundant representation (except for the linearity part):\n");
  dd_WriteMatrix(stdout, M2);
  dd_WriteLPStats(stdout);
  set_free(linrows);

  dd_FreeMatrix(M);
  dd_FreeMatrix(M2);
  dd_clear(val);
  free(newpos1); free(newpos2);

_L99:;
  /* if (err!=dd_NoError) dd_WriteErrorMessages(stderr,err); */
  return 0;
}


/* end of uniqtest.c */