Source/System/FileIO/Ogre/OSGOgreChunkReader.cpp

   1 /*---------------------------------------------------------------------------*\
   2  *                                OpenSG                                     *
   3  *                                                                           *
   4  *                                                                           *
   5  *                Copyright (C) 2010 by the OpenSG Forum                     *
   6  *                                                                           *
   7  *                            www.opensg.org                                 *
   8  *                                                                           *
   9  *   contact: dirk@opensg.org, gerrit.voss@vossg.org, jbehr@zgdv.de          *
  10  *                                                                           *
  11 \*---------------------------------------------------------------------------*/
  12 /*---------------------------------------------------------------------------*\
  13  *                                License                                    *
  14  *                                                                           *
  15  * This library is free software; you can redistribute it and/or modify it   *
  16  * under the terms of the GNU Library General Public License as published    *
  17  * by the Free Software Foundation, version 2.                               *
  18  *                                                                           *
  19  * This library is distributed in the hope that it will be useful, but       *
  20  * WITHOUT ANY WARRANTY; without even the implied warranty of                *
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU         *
  22  * Library General Public License for more details.                          *
  23  *                                                                           *
  24  * You should have received a copy of the GNU Library General Public         *
  25  * License along with this library; if not, write to the Free Software       *
  26  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.                 *
  27  *                                                                           *
  28 \*---------------------------------------------------------------------------*/
  29 /*---------------------------------------------------------------------------*\
  30  *                                Changes                                    *
  31  *                                                                           *
  32  *                                                                           *
  33  *                                                                           *
  34  *                                                                           *
  35  *                                                                           *
  36  *                                                                           *
  37 \*---------------------------------------------------------------------------*/
  38
  39 #include "OSGOgreChunkReader.h"
  40 #include "OSGOgreLog.h"
  41
  42 #include <sstream>
  43
  44 OSG_BEGIN_NAMESPACE
  45
  46 const Int32 OgreChunkReader::_chunkHeaderSize(sizeof(UInt16) + sizeof(UInt32));
  47
  48 /* explicit */
  49 OgreChunkReader::OgreChunkReader(std::istream& is)
  50     : _header(),
  51       _is    (is)
  52 {
  53 }
  54
  55 /* virtual */
  56 OgreChunkReader::~OgreChunkReader(void)
  57 {
  58 }
  59
  60 void
  61 OgreChunkReader::readChunkHeader(std::istream& is)
  62 {
  63     _header.chunkId   = readUInt16(is);
  64     _header.chunkSize = readUInt32(is);
  65 }
  66
  67 void
  68 OgreChunkReader::skip(std::istream& is, Int32 offset)
  69 {
  70     is.seekg(offset, std::ios_base::cur);
  71 }
  72
  73 std::string
  74 OgreChunkReader::readString(std::istream& is)
  75 {
  76     std::string        result;
  77     std::ostringstream oss;
  78
  79     is.get(*oss.rdbuf(), '\n');
  80     is.get();                   // remove '\n'
  81
  82     result = oss.str();
  83
  84     if(result.empty() == false && result[result.length() - 1] == '\r')
  85     {
  86         result.erase(result.length() - 1);
  87     }
  88
  89     return result;
  90 }
  91
  92 bool
  93 OgreChunkReader::readBool(std::istream& is)
  94 {
  95     bool retVal;
  96
  97     readBool(is, &retVal, 1);
  98
  99     return retVal;
 100 }
 101
 102 void
 103 OgreChunkReader::readBool(std::istream& is, bool* values, UInt32 count)
 104 {
 105     for(; count > 0; --count)
 106     {
 107         *values = is.get() != 0 ? true : false;
 108         ++values;
 109     }
 110 }
 111
 112 Int16
 113 OgreChunkReader::readInt16(std::istream& is)
 114 {
 115     Int16 retVal;
 116
 117     readInt16(is, &retVal, 1);
 118
 119     return retVal;
 120 }
 121
 122 void
 123 OgreChunkReader::readInt16(std::istream& is, Int16* values, UInt32 count)
 124 {
 125     is.read(reinterpret_cast<Char8 *>(values), count * sizeof(Int16));
 126 }
 127
 128 UInt16
 129 OgreChunkReader::readUInt16(std::istream& is)
 130 {
 131     UInt16 retVal;
 132
 133     readUInt16(is, &retVal, 1);
 134
 135     return retVal;
 136 }
 137
 138 void
 139 OgreChunkReader::readUInt16(std::istream& is, UInt16* values, UInt32 count)
 140 {
 141     is.read(reinterpret_cast<Char8 *>(values), count * sizeof(UInt16));
 142 }
 143
 144 UInt32
 145 OgreChunkReader::readUInt32(std::istream& is)
 146 {
 147     UInt32 retVal;
 148
 149     readUInt32(is, &retVal, 1);
 150
 151     return retVal;
 152 }
 153
 154 void
 155 OgreChunkReader::readUInt32(std::istream& is, UInt32* values, UInt32 count)
 156 {
 157     is.read(reinterpret_cast<Char8 *>(values), count * sizeof(UInt32));
 158 }
 159
 160 Real32
 161 OgreChunkReader::readReal32(std::istream& is)
 162 {
 163     Real32 retVal;
 164
 165     readReal32(is, &retVal, 1);
 166
 167     return retVal;
 168 }
 169
 170 void
 171 OgreChunkReader::readReal32(std::istream& is, Real32* values, UInt32 count)
 172 {
 173     is.read(reinterpret_cast<Char8 *>(values), count * sizeof(Real32));
 174 }
 175
 176 OSG_END_NAMESPACE