hwpfilter/source/hiodev.h

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20 /**
  21  * hwpio.h
  22  * (C) 1999 Mizi Research, All rights are reserved
  23  */
  24
  25 #ifndef INCLUDED_HWPFILTER_SOURCE_HIODEV_H
  26 #define INCLUDED_HWPFILTER_SOURCE_HIODEV_H
  27
  28 #include <sal/config.h>
  29
  30 #include <stdio.h>
  31
  32 #include <memory>
  33 #include <sal/types.h>
  34
  35 #include "hwplib.h"
  36 /**
  37  * @short Abstract IO class
  38  */
  39 class DLLEXPORT HIODev
  40 {
  41     protected:
  42         bool compressed;
  43         virtual void init();
  44     public:
  45         HIODev();
  46         virtual ~HIODev();
  47
  48         virtual bool open() = 0;
  49         virtual void flush() = 0;
  50         virtual bool state() const = 0;
  51 /* gzip routine wrapper */
  52         virtual bool setCompressed( bool ) = 0;
  53
  54         virtual bool read1b(unsigned char &out) = 0;
  55         virtual bool read1b(char &out) = 0;
  56         virtual bool read2b(unsigned short &out) = 0;
  57         virtual bool read4b(unsigned int &out) = 0;
  58         virtual bool read4b(int &out) = 0;
  59         virtual size_t readBlock( void *ptr, size_t size ) = 0;
  60         virtual size_t skipBlock( size_t size ) = 0;
  61
  62         size_t read2b( void *ptr, size_t nmemb );
  63         size_t read4b( void *ptr, size_t nmemb );
  64 };
  65
  66 struct gz_stream;
  67
  68 /* File input and output devices */
  69
  70 /**
  71  * This controls the HStream given by constructor
  72  * @short Stream IO device
  73  */
  74 class HStreamIODev final: public HIODev
  75 {
  76     private:
  77 /* zlib으로 압축을 풀기 위한 자료 구조 */
  78         std::unique_ptr<HStream> _stream;
  79         gz_stream *_gzfp;
  80     public:
  81         explicit HStreamIODev(std::unique_ptr<HStream> stream);
  82         virtual ~HStreamIODev() override;
  83 /**
  84  * Check whether the stream is available
  85  */
  86         virtual bool open() override;
  87 /**
  88  * If the stream is gzipped, flush the stream.
  89  */
  90         virtual void flush() override;
  91 /**
  92  * Not implemented.
  93  */
  94         virtual bool state() const override;
  95 /**
  96  * Set whether the stream is compressed or not
  97  */
  98         virtual bool setCompressed( bool ) override;
  99 /**
 100  * Read one byte from stream
 101  */
 102         virtual bool read1b(unsigned char &out) override;
 103         virtual bool read1b(char &out) override;
 104 /**
 105  * Read 2 bytes from stream
 106  */
 107         using HIODev::read2b;
 108         virtual bool read2b(unsigned short &out) override;
 109 /**
 110  * Read 4 bytes from stream
 111  */
 112         using HIODev::read4b;
 113         virtual bool read4b(unsigned int &out) override;
 114         virtual bool read4b(int &out) override;
 115 /**
 116  * Read some bytes from stream to given pointer as amount of size
 117  */
 118         virtual size_t readBlock( void *ptr, size_t size ) override;
 119 /**
 120  * Move current pointer of stream as amount of size
 121  */
 122         virtual size_t skipBlock( size_t size ) override;
 123     private:
 124 /**
 125  * Initialize this object
 126  */
 127         virtual void init() override;
 128 };
 129
 130 /* Memory, input and output devices */
 131 /**
 132  * The HMemIODev class controls the Input/Output device.
 133  * @short Memory IO device
 134  */
 135 class HMemIODev final: public HIODev
 136 {
 137     uchar *ptr;
 138     size_t pos, length;
 139     public:
 140         HMemIODev(char *s, size_t len);
 141         virtual ~HMemIODev() override;
 142
 143         virtual bool open() override;
 144         virtual void flush() override;
 145         virtual bool state() const override;
 146 /* gzip routine wrapper */
 147         virtual bool setCompressed( bool ) override;
 148         virtual bool read1b(unsigned char &out) override;
 149         virtual bool read1b(char &out) override;
 150         using HIODev::read2b;
 151         virtual bool read2b(unsigned short &out) override;
 152         using HIODev::read4b;
 153         virtual bool read4b(unsigned int &out) override;
 154         virtual bool read4b(int &out) override;
 155         virtual size_t readBlock( void *ptr, size_t size ) override;
 156         virtual size_t skipBlock( size_t size ) override;
 157     private:
 158         virtual void init() override;
 159 };
 160 #endif // INCLUDED_HWPFILTER_SOURCE_HIODEV_H
 161
 162 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */