thread_safe_ole_stream_reader.h

/*********************************************************************************************************************************************/
/*  DocWire SDK: Award-winning modern data processing in C++20. SourceForge Community Choice & Microsoft support. AI-driven processing.      */
/*  Supports nearly 100 data formats, including email boxes and OCR. Boost efficiency in text extraction, web data extraction, data mining,  */
/*  document analysis. Offline processing possible for security and confidentiality                                                          */
/*                                                                                                                                           */
/*  Copyright (c) SILVERCODERS Ltd, http://silvercoders.com                                                                                  */
/*  Project homepage: https://github.com/docwire/docwire                                                                                     */
/*                                                                                                                                           */
/*  SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-DocWire-Commercial                                                                  */
/*********************************************************************************************************************************************/
 
#ifndef DOCWIRE_THREAD_SAFE_OLE_STREAM_READER_H
#define DOCWIRE_THREAD_SAFE_OLE_STREAM_READER_H
 
#include "core_export.h"
#include <cstdint>
#include <cstdio>
#include "pimpl.h"
#include <string>
#include <vector>
#include "wv2/src/olestream.h"
 
namespace docwire
{
 
class thread_safe_ole_storage;
using namespace wvWare;
class data_stream;
 
class DOCWIRE_CORE_EXPORT thread_safe_ole_stream_reader : public wvWare::OLEStreamReader, public with_pimpl<thread_safe_ole_stream_reader>
{
    friend class thread_safe_ole_storage;
    public:
        struct stream
        {
            uint64_t m_size;
            std::vector<uint32_t> m_file_positions;
            uint32_t m_sector_size;
            data_stream* m_data_stream;
        };
        thread_safe_ole_stream_reader(thread_safe_ole_storage* storage, stream& stream);
    public:
        ~thread_safe_ole_stream_reader() override;
        std::string getLastError() const;
        bool isValid() const override;
        int tell() const override;
        size_t size() const override;
        bool seek(int offset, int whence = SEEK_SET) override;
        bool readU8(U8& data);
        U8 readU8() override;
        bool readS8(S8& data);
        S8 readS8() override;
        bool readU16(U16& data);
        U16 readU16() override;
        bool readS16(S16& data);
        S16 readS16() override;
        bool readU32(U32& data);
        U32 readU32() override;
        bool readS32(S32& data);
        S32 readS32() override;
        bool read(U8 *buffer, size_t length) override;
};
 
} // namespace docwire
 
#endif // DOCWIRE_THREAD_SAFE_OLE_STREAM_READER_H