1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
|
//C- -*- C++ -*-
//C- -------------------------------------------------------------------
//C- DjVuLibre-3.5
//C- Copyright (c) 2002 Leon Bottou and Yann Le Cun.
//C- Copyright (c) 2001 AT&T
//C-
//C- This software is subject to, and may be distributed under, the
//C- GNU General Public License, Version 2. The license should have
//C- accompanied the software or you may obtain a copy of the license
//C- from the Free Software Foundation at http://www.fsf.org .
//C-
//C- This program is distributed in the hope that it will be useful,
//C- but WITHOUT ANY WARRANTY; without even the implied warranty of
//C- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
//C- GNU General Public License for more details.
//C-
//C- DjVuLibre-3.5 is derived from the DjVu(r) Reference Library
//C- distributed by Lizardtech Software. On July 19th 2002, Lizardtech
//C- Software authorized us to replace the original DjVu(r) Reference
//C- Library notice by the following text (see doc/lizard2002.djvu):
//C-
//C- ------------------------------------------------------------------
//C- | DjVu (r) Reference Library (v. 3.5)
//C- | Copyright (c) 1999-2001 LizardTech, Inc. All Rights Reserved.
//C- | The DjVu Reference Library is protected by U.S. Pat. No.
//C- | 6,058,214 and patents pending.
//C- |
//C- | This software is subject to, and may be distributed under, the
//C- | GNU General Public License, Version 2. The license should have
//C- | accompanied the software or you may obtain a copy of the license
//C- | from the Free Software Foundation at http://www.fsf.org .
//C- |
//C- | The computer code originally released by LizardTech under this
//C- | license and unmodified by other parties is deemed "the LIZARDTECH
//C- | ORIGINAL CODE." Subject to any third party intellectual property
//C- | claims, LizardTech grants recipient a worldwide, royalty-free,
//C- | non-exclusive license to make, use, sell, or otherwise dispose of
//C- | the LIZARDTECH ORIGINAL CODE or of programs derived from the
//C- | LIZARDTECH ORIGINAL CODE in compliance with the terms of the GNU
//C- | General Public License. This grant only confers the right to
//C- | infringe patent claims underlying the LIZARDTECH ORIGINAL CODE to
//C- | the extent such infringement is reasonably necessary to enable
//C- | recipient to make, have made, practice, sell, or otherwise dispose
//C- | of the LIZARDTECH ORIGINAL CODE (or portions thereof) and not to
//C- | any greater extent that may be necessary to utilize further
//C- | modifications or combinations.
//C- |
//C- | The LIZARDTECH ORIGINAL CODE is provided "AS IS" WITHOUT WARRANTY
//C- | OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
//C- | TO ANY WARRANTY OF NON-INFRINGEMENT, OR ANY IMPLIED WARRANTY OF
//C- | MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
//C- +------------------------------------------------------------------
//
// $Id: UnicodeByteStream.h,v 1.9 2003/11/07 22:08:22 leonb Exp $
// $Name: release_3_5_15 $
#ifndef _UNICODEBYTESTREAM_H_
#define _UNICODEBYTESTREAM_H_
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#if NEED_GNUG_PRAGMAS
# pragma interface
#endif
/** @name UnicodeByteStream.h
Files #"UnicodeByteStream.h"# and #"UnicodeByteStream.cpp"# implement a parser for
files structured W3C Extensible Markup Language (XML) 1.0 (Second Edition).
Class \Ref{UnicodeByteStream} provides a way to read or write XML files.
files. Member functions provide an easy mean to position the underlying
\Ref{ByteStream}.
{\bf References} --- W3C Extensible Markup Language (XML) 1.0
(Second Edition)
\URL{http://www.w3.org/TR/2000/REC-xml-20001006.html}
@memo
XML file parser.
@author
Bill C Riemers <docbill@sourceforge.net>
@version
#$Id: UnicodeByteStream.h,v 1.9 2003/11/07 22:08:22 leonb Exp $# */
//@{
#include "DjVuGlobal.h"
#include "GString.h"
#include "ByteStream.h"
#ifdef HAVE_NAMESPACES
namespace DJVU {
# ifdef NOT_DEFINED // Just to fool emacs c++ mode
}
#endif
#endif
/** ByteStream interface for an Unicode file.
Class #UnicodeByteStream# augments the #ByteStream# interface with
functions for navigating Unicode documents. It works in relation
with a ByteStream specified at construction time.
{\bf Reading an Unicode file} --- You can read an Unicode file by
constructing an #UnicodeByteStream# object attached to the ByteStream
containing the Unicode file.
{\bf Writing an Unicode file} --- You can write an Unicode file by
constructing an #UnicodeByteStream# object attached to the seekable
ByteStream object that will contain the XML file.
Writing an XML file requires a seekable ByteStream (see
\Ref{ByteStream::is_seekable}). This is not much of a problem because you
can always create the XML file into a \Ref{MemoryByteStream} and then use
\Ref{ByteStream::copy} to transfer the XML file into a non seekable
ByteStream. */
class UnicodeByteStream : public ByteStream
{
protected:
UnicodeByteStream(const UnicodeByteStream &bs);
UnicodeByteStream(GP<ByteStream> bs,
const GStringRep::EncodeType encodetype=GStringRep::XUTF8);
public:
/** Constructs an UnicodeByteStream object attached to ByteStream #bs#.
Any ByteStream can be used when reading an XML file. Writing
an XML file however requires a seekable ByteStream. */
static GP<UnicodeByteStream> create(GP<ByteStream> bs,
const GStringRep::EncodeType encodetype=GStringRep::XUTF8)
{ return new UnicodeByteStream(bs,encodetype); }
// --- BYTESTREAM INTERFACE
~UnicodeByteStream();
/// Sets the encoding type and seek's to position 0.
void set_encodetype(const GStringRep::EncodeType et=GStringRep::XUTF8);
void set_encoding(const GUTF8String &encoding);
/// Simmular to fgets(), except read aheads effect the tell() position.
virtual GUTF8String gets(size_t const t=0,unsigned long const stopat='\n',bool const inclusive=true);
/// Resets the gets buffering as well as physically seeking.
virtual int seek(long offset, int whence = SEEK_SET, bool nothrow=false);
/** Physically reads the specified bytes, and truncate the read ahead buffer.
*/
virtual size_t read(void *buffer, size_t size);
/// Not correctly implimented...
virtual size_t write(const void *buffer, size_t size);
/// tell will tell you the read position, including read ahead for gets()...
virtual long tell(void) const;
/// Does a flush, and clears the read ahead buffer.
virtual void flush(void);
/// Find out how many lines have been read with gets.
int get_lines_read(void) const { return linesread; }
protected:
/// The real byte stream.
GP<ByteStream> bs;
GUTF8String buffer;
int bufferpos;
int linesread;
long startpos;
private:
// Cancel C++ default stuff
UnicodeByteStream & operator=(UnicodeByteStream &);
};
class XMLByteStream : public UnicodeByteStream
{
protected:
XMLByteStream(GP<ByteStream> &bs);
XMLByteStream(UnicodeByteStream &bs);
void init(void);
public:
static GP<XMLByteStream> create(GP<ByteStream> bs);
static GP<XMLByteStream> create(UnicodeByteStream &bs);
// --- BYTESTREAM INTERFACE
~XMLByteStream();
};
inline GP<XMLByteStream>
XMLByteStream::create(UnicodeByteStream &bs)
{
return new XMLByteStream(bs);
}
//@}
#ifdef HAVE_NAMESPACES
}
# ifndef NOT_USING_DJVU_NAMESPACE
using namespace DJVU;
# endif
#endif
#endif
|
