mirror of
https://github.com/ONLYOFFICE/core.git
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331 lines
6.8 KiB
C++
331 lines
6.8 KiB
C++
/*
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* (c) Copyright Ascensio System SIA 2010-2017
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*
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* This program is a free software product. You can redistribute it and/or
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* modify it under the terms of the GNU Affero General Public License (AGPL)
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* version 3 as published by the Free Software Foundation. In accordance with
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* Section 7(a) of the GNU AGPL its Section 15 shall be amended to the effect
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* that Ascensio System SIA expressly excludes the warranty of non-infringement
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* of any third-party rights.
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*
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* This program is distributed WITHOUT ANY WARRANTY; without even the implied
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* warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. For
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* details, see the GNU AGPL at: http://www.gnu.org/licenses/agpl-3.0.html
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*
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* You can contact Ascensio System SIA at Lubanas st. 125a-25, Riga, Latvia,
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* EU, LV-1021.
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*
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* The interactive user interfaces in modified source and object code versions
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* of the Program must display Appropriate Legal Notices, as required under
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* Section 5 of the GNU AGPL version 3.
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*
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* Pursuant to Section 7(b) of the License you must retain the original Product
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* logo when distributing the program. Pursuant to Section 7(e) we decline to
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* grant you any rights under trademark law for use of our trademarks.
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*
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* All the Product's GUI elements, including illustrations and icon sets, as
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* well as technical writing content are licensed under the terms of the
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* Creative Commons Attribution-ShareAlike 4.0 International. See the License
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* terms at http://creativecommons.org/licenses/by-sa/4.0/legalcode
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*
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*/
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#pragma once
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class CDataStream
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{
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public:
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CDataStream() : pBuffer(NULL)
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{
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}
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CDataStream(BYTE* pBuf, unsigned int unSize)
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{
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SetStream(pBuf, unSize);
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}
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~CDataStream()
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{
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}
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void SetStream(BYTE* pBuf, unsigned int unSize)
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{
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pBuffer = pBuf;
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pCur = pBuf;
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pEnd = pBuf + unSize + 1;
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};
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BYTE* GetCurPtr()
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{
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return pCur;
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}
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unsigned char ReadUChar()
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{
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if (pCur + 1 >= pEnd)
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return 0;
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unsigned char unResult = pCur[0];
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pCur++;
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return unResult;
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};
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unsigned short ReadUShort()
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{
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if (pCur + 2 >= pEnd)
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return 0;
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unsigned short ushResult = (pCur[0]) | ((pCur[1]) << 8);
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pCur += 2;
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return ushResult;
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};
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unsigned int ReadULong()
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{
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if (pCur + 4 >= pEnd)
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return 0;
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unsigned int unResult = (unsigned int)((pCur[0] << 0) | ((pCur[1]) << 8) | ((pCur[2]) << 16) | ((pCur[3]) << 24));
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pCur += 4;
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return unResult;
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};
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double ReadDouble()
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{
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if (pCur + 4 >= pEnd)
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return 0;
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float output;
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*((unsigned char*)(&output) + 0) = pCur[0];
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*((unsigned char*)(&output) + 1) = pCur[1];
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*((unsigned char*)(&output) + 2) = pCur[2];
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*((unsigned char*)(&output) + 3) = pCur[3];
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pCur += 4;
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return output;
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int lIntValue = (int)((pCur[0] << 16) | ((pCur[1]) << 8) | ((pCur[2]) << 0));
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int lFracValue = (int)(pCur[3]);
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pCur += 4;
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return (double)(lIntValue + (lFracValue / 16.0));
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};
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char ReadChar()
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{
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return (char)ReadUChar();
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};
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short ReadShort()
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{
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return (short)ReadUShort();
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};
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int ReadLong()
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{
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return (int)ReadULong();
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};
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void ReadBytes(char* pBuffer, unsigned int ulSize)
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{
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size_t ulRemainSize = (pEnd - pCur);
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size_t ulFinalSize = (ulRemainSize > ulSize ? ulSize : ulRemainSize);
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for (size_t ulIndex = 0; ulIndex < ulFinalSize; ulIndex++)
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{
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pBuffer[ulIndex] = ReadChar();
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}
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};
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void ReadBytes(unsigned char* pBuffer, unsigned int ulSize)
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{
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size_t ulRemainSize = (pEnd - pCur);
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size_t ulFinalSize = (ulRemainSize > ulSize ? ulSize : ulRemainSize);
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for (size_t ulIndex = 0; ulIndex < ulFinalSize; ulIndex++)
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{
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pBuffer[ulIndex] = ReadChar();
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}
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};
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void ReadBytes(unsigned short* pBuffer, unsigned int ulSize)
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{
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size_t ulRemainSize = (pEnd - pCur) / 2;
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size_t ulFinalSize = (ulRemainSize > ulSize ? ulSize : ulRemainSize);
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for (size_t ulIndex = 0; ulIndex < ulFinalSize; ulIndex++)
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{
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pBuffer[ulIndex] = ReadUShort();
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}
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}
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void ReadBytes(short* pBuffer, unsigned int ulSize)
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{
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size_t ulRemainSize = (pEnd - pCur) / 2;
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size_t ulFinalSize = (ulRemainSize > ulSize ? ulSize : ulRemainSize);
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for (size_t ulIndex = 0; ulIndex < ulFinalSize; ulIndex++)
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{
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pBuffer[ulIndex] = ReadShort();
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}
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}
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void ReadBytes(unsigned int* pBuffer, unsigned int ulSize)
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{
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size_t ulRemainSize = (pEnd - pCur) / 4;
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size_t ulFinalSize = (ulRemainSize > ulSize ? ulSize : ulRemainSize);
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for (size_t ulIndex = 0; ulIndex < ulFinalSize; ulIndex++)
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{
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pBuffer[ulIndex] = ReadULong();
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}
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}
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CDataStream& operator>>(unsigned char& nValue)
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{
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nValue = ReadUChar();
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return *this;
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}
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CDataStream& operator>>(unsigned short& nValue)
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{
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nValue = ReadUShort();
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return *this;
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}
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CDataStream& operator>>(unsigned int& nValue)
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{
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nValue = ReadULong();
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return *this;
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}
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CDataStream& operator>>(unsigned long& nValue)
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{
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nValue = ReadULong();
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return *this;
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}
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CDataStream& operator>>(double& dValue)
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{
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dValue = ReadDouble();
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return *this;
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}
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CDataStream& operator>>(char& nValue)
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{
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nValue = ReadChar();
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return *this;
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}
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CDataStream& operator>>(bool& nValue)
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{
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nValue = !!ReadChar();
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return *this;
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}
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CDataStream& operator>>(short& nValue)
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{
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nValue = ReadShort();
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return *this;
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}
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CDataStream& operator>>(int& nValue)
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{
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nValue = ReadLong();
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return *this;
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}
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CDataStream& operator>>(long& nValue)
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{
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nValue = ReadLong();
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return *this;
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}
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bool IsValid() const
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{
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if (NULL == pBuffer)
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return false;
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return true;
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}
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bool IsEof() const
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{
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if (pCur >= pEnd)
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return true;
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return false;
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}
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unsigned int Tell()
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{
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return (unsigned int)(pCur - pBuffer);
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}
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void Skip(unsigned int ulSkip)
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{
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pCur += ulSkip;
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}
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void SeekBack(unsigned int ulSkipBack)
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{
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pCur -= ulSkipBack;
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}
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void SeekToStart()
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{
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pCur = pBuffer;
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}
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unsigned int CanRead()
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{
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return (unsigned int)(pEnd - pCur);
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}
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private:
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BYTE *pBuffer;
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BYTE *pCur;
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BYTE *pEnd;
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};
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struct LengthPrefixedAnsiString
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{
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_UINT32 size;
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std::string val;
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};
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CDataStream & operator >> (CDataStream & strm, LengthPrefixedAnsiString & str)
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{
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strm >> str.size;
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char *s = new char[str.size];
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strm.ReadBytes(s, str.size);
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str.val = std::string(s,str.size);
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delete []s;
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return strm;
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}
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struct ObjectHeader
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{
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_UINT32 OLEVersion;
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_UINT32 FormatID;
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LengthPrefixedAnsiString ClassName;
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_UINT32 Width;
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_UINT32 Height;
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};
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class Ole1FormatReader
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{
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public:
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Ole1FormatReader(BYTE *pData, int Size)
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{
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if (!pData || Size < 8) return;
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CDataStream stream(pData, Size);
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stream >> Header.OLEVersion >> Header.FormatID;
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if (Header.OLEVersion & 0x00000500)
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{
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stream >> Header.ClassName;
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}
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stream >> Header.Width >> Header.Height;
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stream >> NativeDataSize;
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NativeData = stream.GetCurPtr();
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stream.Skip(NativeDataSize);
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int sz = stream.CanRead();
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/// далее графическое представление
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}
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ObjectHeader Header;
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_UINT32 NativeDataSize;
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BYTE *NativeData;
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//PresentationObjectHeader PresentationHeader;
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};
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