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// Copyright (c) 2005-2024 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/Pipeline.hh>
#include <qpdf/Types.h>
class QPDF_DLL_CLASS Pl_Count: public Pipeline
{
public:
QPDF_DLL
Pl_Count(char const* identifier, Pipeline* next);
QPDF_DLL
~Pl_Count() override;
QPDF_DLL
void write(unsigned char const*, size_t) override;
QPDF_DLL
void finish() override;
// 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:
class QPDF_DLL_PRIVATE Members
{
friend class Pl_Count;
public:
QPDF_DLL
~Members() = default;
private:
Members();
Members(Members const&) = delete;
// Must be qpdf_offset_t, not size_t, to handle writing more than size_t can handle.
qpdf_offset_t count;
unsigned char last_char;
};
std::shared_ptr<Members> m;
};
#endif // PL_COUNT_HH
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