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// Copyright (c) 2005-2018 Jay Berkenbilt
//
// This file is part of qpdf.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// Versions of qpdf prior to version 7 were released under the terms
// of version 2.0 of the Artistic License. At your option, you may
// continue to consider qpdf to be licensed under those terms. Please
// see the manual for additional information.

#ifndef __PL_COUNT_HH__
#define __PL_COUNT_HH__

// This pipeline is reusable; i.e., it is safe to call write() after
// calling finish().

#include <qpdf/Types.h>
#include <qpdf/Pipeline.hh>

class Pl_Count: public Pipeline
{
  public:
    QPDF_DLL
    Pl_Count(char const* identifier, Pipeline* next);
    QPDF_DLL
    virtual ~Pl_Count();
    QPDF_DLL
    virtual void write(unsigned char*, size_t);
    QPDF_DLL
    virtual void finish();
    // Returns the number of bytes written
    QPDF_DLL
    qpdf_offset_t getCount() const;
    // Returns the last character written, or '\0' if no characters
    // have been written (in which case getCount() returns 0)
    QPDF_DLL
    unsigned char getLastChar() const;

  private:
    qpdf_offset_t count;
    unsigned char last_char;
};

#endif // __PL_COUNT_HH__