1/**************************************************************************** 2** libebml : parse EBML files, see http://embl.sourceforge.net/ 3** 4** <file/class description> 5** 6** Copyright (C) 2002-2005 Steve Lhomme. All rights reserved. 7** 8** This file is part of libebml. 9** 10** This library is free software; you can redistribute it and/or 11** modify it under the terms of the GNU Lesser General Public 12** License as published by the Free Software Foundation; either 13** version 2.1 of the License, or (at your option) any later version. 14** 15** This library is distributed in the hope that it will be useful, 16** but WITHOUT ANY WARRANTY; without even the implied warranty of 17** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18** Lesser General Public License for more details. 19** 20** You should have received a copy of the GNU Lesser General Public 21** License along with this library; if not, write to the Free Software 22** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 23** 24** See http://www.matroska.org/license/lgpl/ for LGPL licensing information. 25** 26** Contact license@matroska.org if any conditions of this licensing are 27** not clear to you. 28** 29**********************************************************************/ 30 31/*! 32 \file 33 \version \$Id: EbmlString.cpp 1079 2005-03-03 13:18:14Z robux4 $ 34 \author Steve Lhomme <robux4 @ users.sf.net> 35*/ 36#include <cassert> 37 38#include "ebml/EbmlString.h" 39 40START_LIBEBML_NAMESPACE 41 42EbmlString::EbmlString() 43 :EbmlElement(0, false) 44{ 45 DefaultSize = 0; 46/* done automatically 47 Size = Value.length(); 48 if (DefaultSize > Size) 49 Size = DefaultSize;*/ 50} 51 52EbmlString::EbmlString(const std::string & aDefaultValue) 53 :EbmlElement(0, true), Value(aDefaultValue), DefaultValue(aDefaultValue) 54{ 55 DefaultSize = 0; 56 DefaultIsSet = true; 57/* done automatically 58 Size = Value.length(); 59 if (DefaultSize > Size) 60 Size = DefaultSize;*/ 61} 62 63/*! 64 \todo Cloning should be on the same exact type ! 65*/ 66EbmlString::EbmlString(const EbmlString & ElementToClone) 67 :EbmlElement(ElementToClone) 68 ,Value(ElementToClone.Value) 69 ,DefaultValue(ElementToClone.DefaultValue) 70{ 71} 72 73/*! 74 \todo handle exception on errors 75*/ 76uint32 EbmlString::RenderData(IOCallback & output, bool bForceRender, bool bKeepIntact) 77{ 78 uint32 Result; 79 output.writeFully(Value.c_str(), Value.length()); 80 Result = Value.length(); 81 82 if (Result < DefaultSize) { 83 // pad the rest with 0 84 binary *Pad = new binary[DefaultSize - Result]; 85 if (Pad == NULL) 86 { 87 return Result; 88 } 89 memset(Pad, 0x00, DefaultSize - Result); 90 output.writeFully(Pad, DefaultSize - Result); 91 Result = DefaultSize; 92 delete [] Pad; 93 } 94 95 return Result; 96} 97 98EbmlString & EbmlString::operator=(const std::string NewString) 99{ 100 Value = NewString; 101 bValueIsSet = true; 102/* done automatically 103 Size = Value.length(); 104 if (DefaultSize > Size) 105 Size = DefaultSize;*/ 106 return *this; 107} 108 109uint64 EbmlString::UpdateSize(bool bKeepIntact, bool bForceRender) 110{ 111 if (!bKeepIntact && IsDefaultValue()) 112 return 0; 113 114 if (Value.length() < DefaultSize) { 115 Size = DefaultSize; 116 } else { 117 Size = Value.length(); 118 } 119 return Size; 120} 121 122uint64 EbmlString::ReadData(IOCallback & input, ScopeMode ReadFully) 123{ 124 if (ReadFully != SCOPE_NO_DATA) 125 { 126 if (Size == 0) { 127 Value = ""; 128 bValueIsSet = true; 129 } else { 130 char *Buffer = new char[Size + 1]; 131 if (Buffer == NULL) { 132 // unable to store the data, skip it 133 input.setFilePointer(Size, seek_current); 134 } else { 135 input.readFully(Buffer, Size); 136 if (Buffer[Size-1] != '\0') { 137 Buffer[Size] = '\0'; 138 } 139 Value = Buffer; 140 delete [] Buffer; 141 bValueIsSet = true; 142 } 143 } 144 } 145 146 return Size; 147} 148 149END_LIBEBML_NAMESPACE 150