bars2sym2of5.h

barcode readers [ from Image]

//
// Given an array of edge positions and strengths compute a string
// representing the bar code widths corresponding to those edge
// positions.
//
// Copyright (C) 2006 by Jon A. Webb
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
// 
// This library 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
// Lesser General Public License for more details.
// 
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
//

#ifndef Bars2Sym2of5_h
#define Bars2Sym2of5_h

#include "Bars2Sym.h"

#include <e32cons.h>
#include <e32math.h>


	class CBars2Sym2of5: public CBars2Sym
    {
        // Lifecycle
    public:
        IMPORT_C static CBars2Sym2of5* NewL(bool allowSkipped);
        ~CBars2Sym2of5(void);

    private:
		// Constructor
        CBars2Sym2of5(bool allowSkipped);

        // Operations
    public:
        // FindBarsL
		//   Given an array of bar widths (one byte per bar) decode the
		//   bar widths according to interlaced 2 of 5 and return the decoded
		//   string, or false if the bars don't appear to be an interlaced 2
		//   of 5 code.
        //
		// Input
		//  pBars is an array of bar widths
		// Output
		//  pCode is the decoded string
        IMPORT_C bool DecodeL(
				CArrayFix<char>* pBars, 
				CodeType*& pCode);

	private:
		bool Code2Digit(int code, TChar& digit) const;

		// Accessors
	public:
		const TDesC& Name() const;
    private:
        // Attributes
		char iLookup[32];
    };


#endif // Bars2Sym2of5_h