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Doc format refactored
x2t compiled.
This commit is contained in:
Vikulov Dmitry
216
MsBinaryFile/DocFile/MemoryStream.cpp
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216
MsBinaryFile/DocFile/MemoryStream.cpp
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/*
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* (c) Copyright Ascensio System SIA 2010-2019
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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 20A-12 Ernesta Birznieka-Upisha
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* street, Riga, Latvia, EU, LV-1050.
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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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#include "MemoryStream.h"
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MemoryStream::MemoryStream (unsigned char* data, unsigned long size, bool bMemCopy) : m_Data(NULL), m_Size(0), m_Position(0), bMemoryCopy(bMemCopy)
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{
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if ( ( data != NULL ) && ( size != 0 ) )
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{
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m_Size = size;
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if (bMemoryCopy)
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{
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m_Data = new unsigned char[m_Size];
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if (m_Data)
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{
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memcpy (m_Data, data, m_Size);
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}
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}
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else
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{
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m_Data = data;
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}
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}
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}
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MemoryStream::~MemoryStream()
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{
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if (bMemoryCopy)
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RELEASEARRAYOBJECTS (m_Data);
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}
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_UINT64 MemoryStream::ReadUInt64()
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{
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_UINT64 rdU64 = 0;
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if (m_Data)
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{
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rdU64 = DocFileFormat::FormatUtils::BytesToUInt64(m_Data, m_Position, m_Size);
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m_Position += 8;
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}
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return rdU64;
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}
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unsigned short MemoryStream::ReadUInt16()
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{
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unsigned short rdUShort = 0;
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if (m_Data)
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{
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rdUShort = DocFileFormat::FormatUtils::BytesToUInt16 (m_Data, m_Position, m_Size);
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m_Position += 2;
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}
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return rdUShort;
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}
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void MemoryStream::WriteUInt16(unsigned short val)
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{
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if (m_Data && (m_Position + sizeof(unsigned short) <= m_Size))
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{
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((unsigned short *)(m_Data + m_Position))[0] = val;
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m_Position += 2;
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}
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}
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short MemoryStream::ReadInt16()
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{
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short rdShort = 0;
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if (m_Data)
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{
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rdShort = DocFileFormat::FormatUtils::BytesToInt16 (m_Data, m_Position, m_Size);
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m_Position += 2;
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}
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return rdShort;
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}
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int MemoryStream::ReadInt32()
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{
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int rdInt = 0;
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if (m_Data)
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{
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rdInt = DocFileFormat::FormatUtils::BytesToInt32 (m_Data, m_Position, m_Size);
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m_Position += 4;
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}
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return rdInt;
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}
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void MemoryStream::WriteInt32(_INT32 val)
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{
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if (m_Data && (m_Position + sizeof(_INT32) <= m_Size))
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{
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((_INT32 *)(m_Data + m_Position))[0] = val;
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m_Position += 4;
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}
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}
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void MemoryStream::Align(_UINT32 val)
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{
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_UINT32 padding = val - (m_Position % val);
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if (padding > 0 && padding < 4)
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m_Position += padding;
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}
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unsigned int MemoryStream::ReadUInt32()
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{
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int rdUInt = 0;
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if (m_Data )
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{
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rdUInt = DocFileFormat::FormatUtils::BytesToUInt32 (m_Data, m_Position, m_Size);
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m_Position += 4;
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}
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return rdUInt;
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}
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void MemoryStream::WriteByte(unsigned char val)
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{
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if (m_Data && (m_Position + 1 <= m_Size))
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{
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m_Data[m_Position] = val;
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m_Position += 1;
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}
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}
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void MemoryStream::WriteUInt32(_UINT32 val)
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{
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if (m_Data && (m_Position + sizeof(_UINT32) <= m_Size))
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{
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((_UINT32 *)(m_Data + m_Position))[0] = val;
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m_Position += sizeof(_UINT32);
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}
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}
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unsigned char MemoryStream::ReadByte()
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{
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unsigned char rdByte = 0;
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if (m_Data)
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{
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rdByte = (m_Position < m_Size) ? m_Data[m_Position] : 0;
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m_Position += sizeof(rdByte);
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}
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return rdByte;
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}
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unsigned char* MemoryStream::ReadBytes (unsigned int count, bool isResultNeeded)
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{
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if (!m_Data) return NULL;
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unsigned int size = ( count <= (m_Size - m_Position) ) ? (count) : (m_Size - m_Position);
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unsigned char* pBytes = (isResultNeeded && count > 0) ? new unsigned char[count] : NULL;
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if (pBytes)
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{
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memcpy(pBytes, (m_Data + m_Position), size);
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}
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m_Position += size;
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return pBytes;
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}
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void MemoryStream::WriteBytes(unsigned char* pData, int size)
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{
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if (m_Data && (m_Position + size <= m_Size))
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{
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memcpy(m_Data + m_Position, pData, size);
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m_Position += size;
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}
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}
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unsigned long MemoryStream::GetPosition() const
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{
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return m_Position;
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}
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unsigned long MemoryStream::GetSize() const
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{
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return m_Size;
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}
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int MemoryStream::Seek (int offset, int origin)
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{
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if (origin == 2) offset = m_Position + offset;
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if (origin == 1) offset = m_Size - offset;
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if ( (m_Data != NULL) && (offset >= 0) && ((unsigned int)offset < m_Size) )
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return m_Position = offset;
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return 0;
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}
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