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63 lines
2.7 KiB
C
63 lines
2.7 KiB
C
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/*====================================================================*
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- Copyright (C) 2001 Leptonica. All rights reserved.
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- This software is distributed in the hope that it will be
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- useful, but with NO WARRANTY OF ANY KIND.
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- No author or distributor accepts responsibility to anyone for the
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- consequences of using this software, or for whether it serves any
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- particular purpose or works at all, unless he or she says so in
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- writing. Everyone is granted permission to copy, modify and
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- redistribute this source code, for commercial or non-commercial
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- purposes, with the following restrictions: (1) the origin of this
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- source code must not be misrepresented; (2) modified versions must
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- be plainly marked as such; and (3) this notice may not be removed
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- or altered from any source or modified source distribution.
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*====================================================================*/
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#ifndef SUDOKU_H_INCLUDED
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#define SUDOKU_H_INCLUDED
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/*
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* sudoku.h
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*
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* The L_Sudoku holds all the information of the current state.
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*
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* The input to sudokuCreate() is a file with any number of lines
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* starting with '#', followed by 9 lines consisting of 9 numbers
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* in each line. These have the known values and use 0 for the unknowns.
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* Blank lines are ignored.
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*
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* The @locs array holds the indices of the unknowns, numbered
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* left-to-right and top-to-bottom from 0 to 80. The array size
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* is initialized to @num. @current is the index into the @locs
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* array of the current guess: locs[current].
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*
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* The @state array is used to determine the validity of each guess.
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* It is of size 81, and is initialized by setting the unknowns to 0
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* and the knowns to their input values.
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*/
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struct L_Sudoku
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{
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l_int32 num; /* number of unknowns */
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l_int32 *locs; /* location of unknowns */
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l_int32 current; /* index into @locs of current location */
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l_int32 *init; /* initial state, with 0 representing */
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/* the unknowns */
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l_int32 *state; /* present state, including inits and */
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/* guesses of unknowns up to @current */
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l_int32 nguess; /* shows current number of guesses */
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l_int32 finished; /* set to 1 when solved */
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l_int32 failure; /* set to 1 if no solution is possible */
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};
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typedef struct L_Sudoku L_SUDOKU;
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/* For printing out array data */
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enum {
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L_SUDOKU_INIT = 0,
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L_SUDOKU_STATE = 1
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};
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#endif /* SUDOKU_H_INCLUDED */
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