text: /*====================================================================*
   -  Copyright (C) 2001 Leptonica.  All rights reserved.
   -  This software is distributed in the hope that it will be
   -  useful, but with NO WARRANTY OF ANY KIND.
   -  No author or distributor accepts responsibility to anyone for the
   -  consequences of using this software, or for whether it serves any
   -  particular purpose or works at all, unless he or she says so in
   -  writing.  Everyone is granted permission to copy, modify and
   -  redistribute this source code, for commercial or non-commercial
   -  purposes, with the following restrictions: (1) the origin of this
   -  source code must not be misrepresented; (2) modified versions must
   -  be plainly marked as such; and (3) this notice may not be removed
   -  or altered from any source or modified source distribution.
   *====================================================================*/
  
  /*
   * sudokutest.c
   *
   *   Tests sudoku solver and generator.
   */
  
  #include "allheaders.h"
  
  static const char *startsol = "3 8 7 2 6 4 1 9 5 "
                                "2 6 5 8 9 1 4 3 7 "
                                "1 4 9 5 3 7 6 8 2 "
                                "5 2 3 7 1 6 8 4 9 "
                                "7 1 6 9 4 8 2 5 3 "
                                "8 9 4 3 5 2 7 1 6 "
                                "9 7 2 1 8 5 3 6 4 "
                                "4 3 1 6 7 9 5 2 8 "
                                "6 5 8 4 2 3 9 7 1";
  
  main(int    argc,
       char **argv)
  {
  l_int32      unique;
  l_int32     *array;
  L_SUDOKU    *sud;
  static char  mainName[] = "sudokutest";
  
      if (argc != 1 && argc != 2)
  	return ERROR_INT(" Syntax: sudokutest [filein]", mainName, 1);
  
      if (argc == 1) {
              /* Generate a new sudoku by element elimination */
          array = sudokuReadString(startsol);
          sud = sudokuGenerate(array, 3693, 28, 7);
          sudokuDestroy(&sud);
          lept_free(array);
          return 0;
      }
  
          /* Solve the input sudoku */
      if ((array = sudokuReadFile(argv[1])) == NULL)
          return ERROR_INT("invalid input", mainName, 1);
      if ((sud = sudokuCreate(array)) == NULL)
          return ERROR_INT("sud not made", mainName, 1);
      sudokuOutput(sud, L_SUDOKU_INIT);
      startTimer();
      sudokuSolve(sud);
      fprintf(stderr, "Time: %7.3f sec\n", stopTimer());
      sudokuOutput(sud, L_SUDOKU_STATE);
      sudokuDestroy(&sud);
  
          /* Test for uniqueness */
      sudokuTestUniqueness(array, &unique);
      if (unique)
          fprintf(stderr, "Sudoku is unique\n");
      else
          fprintf(stderr, "Sudoku is NOT unique\n");
      lept_free(array);
  
      return 0;
  }
  
  
  