/src/libwpg/src/lib/WPGXParser.cpp
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1 | | /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */ |
2 | | /* libwpg |
3 | | * Version: MPL 2.0 / LGPLv2.1+ |
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 | | * Major Contributor(s): |
10 | | * Copyright (C) 2006 Ariya Hidayat (ariya@kde.org) |
11 | | * Copyright (C) 2004 Marc Oude Kotte (marc@solcon.nl) |
12 | | * Copyright (C) 2005 Fridrich Strba (fridrich.strba@bluewin.ch) |
13 | | * |
14 | | * For minor contributions see the git repository. |
15 | | * |
16 | | * Alternatively, the contents of this file may be used under the terms |
17 | | * of the GNU Lesser General Public License Version 2.1 or later |
18 | | * (LGPLv2.1+), in which case the provisions of the LGPLv2.1+ are |
19 | | * applicable instead of those above. |
20 | | * |
21 | | * For further information visit http://libwpg.sourceforge.net |
22 | | */ |
23 | | |
24 | | /* "This product is not manufactured, approved, or supported by |
25 | | * Corel Corporation or Corel Corporation Limited." |
26 | | */ |
27 | | |
28 | | #include "WPGXParser.h" |
29 | | |
30 | | WPGXParser::WPGXParser(librevenge::RVNGInputStream *input, librevenge::RVNGDrawingInterface *painter): |
31 | 0 | m_input(input), m_painter(painter), m_colorPalette(std::map<int,libwpg::WPGColor>()) |
32 | 0 | { |
33 | 0 | } |
34 | | |
35 | | WPGXParser::WPGXParser(const WPGXParser &parser): |
36 | 0 | m_input(parser.m_input), m_painter(parser.m_painter), |
37 | 0 | m_colorPalette(parser.m_colorPalette) |
38 | 0 | { |
39 | 0 | } |
40 | | |
41 | | unsigned char WPGXParser::readU8() |
42 | 0 | { |
43 | 0 | if (!m_input || m_input->isEnd()) |
44 | 0 | return (unsigned char)0; |
45 | 0 | unsigned long numBytesRead; |
46 | 0 | unsigned char const *p = m_input->read(1, numBytesRead); |
47 | |
|
48 | 0 | if (p && numBytesRead == 1) |
49 | 0 | return *(unsigned char const *)(p); |
50 | 0 | return (unsigned char)0; |
51 | 0 | } |
52 | | |
53 | | unsigned short WPGXParser::readU16() |
54 | 0 | { |
55 | 0 | auto p0 = (unsigned short)readU8(); |
56 | 0 | auto p1 = (unsigned short)readU8(); |
57 | 0 | return (unsigned short)(p0|(p1<<8)); |
58 | 0 | } |
59 | | |
60 | | unsigned int WPGXParser::readU32() |
61 | 0 | { |
62 | 0 | auto p0 = (unsigned int)readU8(); |
63 | 0 | auto p1 = (unsigned int)readU8(); |
64 | 0 | auto p2 = (unsigned int)readU8(); |
65 | 0 | auto p3 = (unsigned int)readU8(); |
66 | 0 | return (unsigned int)(p0|(p1<<8)|(p2<<16)|(p3<<24)); |
67 | 0 | } |
68 | | |
69 | | short WPGXParser::readS16() |
70 | 0 | { |
71 | 0 | return (short)readU16(); |
72 | 0 | } |
73 | | |
74 | | int WPGXParser::readS32() |
75 | 0 | { |
76 | 0 | return (int)readU32(); |
77 | 0 | } |
78 | | |
79 | | unsigned int WPGXParser::readVariableLengthInteger() |
80 | 0 | { |
81 | | // read a byte |
82 | 0 | unsigned char value8 = readU8(); |
83 | | // if it's in the range 0-0xFE, then we have a 8-bit value |
84 | 0 | if (value8<=0xFE) |
85 | 0 | { |
86 | 0 | return (unsigned int)value8; |
87 | 0 | } |
88 | 0 | else |
89 | 0 | { |
90 | | // now read a 16 bit value |
91 | 0 | unsigned short value16 = readU16(); |
92 | | // if the MSB is 1, we have a 32 bit value |
93 | 0 | if (value16>>15) |
94 | 0 | { |
95 | | // read the next 16 bit value (LSB part, in value16 resides the MSB part) |
96 | 0 | unsigned long lvalue16 = readU16(); |
97 | 0 | unsigned long value32 = value16 & 0x7fff; // mask out the MSB |
98 | 0 | return (unsigned int)((value32<<16)+lvalue16); |
99 | 0 | } |
100 | 0 | else |
101 | 0 | { |
102 | | // we have a 16 bit value, return it |
103 | 0 | return (unsigned int)value16; |
104 | 0 | } |
105 | 0 | } |
106 | 0 | } |
107 | | |
108 | | WPGXParser &WPGXParser::operator=(const WPGXParser &parser) |
109 | 0 | { |
110 | 0 | if (this != &parser) |
111 | 0 | { |
112 | 0 | m_input = parser.m_input; |
113 | 0 | m_painter = parser.m_painter; |
114 | 0 | m_colorPalette = parser.m_colorPalette; |
115 | 0 | } |
116 | 0 | return *this; |
117 | 0 | } |
118 | | |
119 | | /* vim:set shiftwidth=4 softtabstop=4 noexpandtab: */ |