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https://github.com/Alfresco/alfresco-community-repo.git
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4e2300f095
git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/HEAD/root@5186 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
159 lines
4.3 KiB
C++
159 lines
4.3 KiB
C++
/*
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* Copyright (C) 2005-2007 Alfresco Software Limited.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* As a special exception to the terms and conditions of version 2.0 of
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* the GPL, you may redistribute this Program in connection with Free/Libre
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* and Open Source Software ("FLOSS") applications as described in Alfresco's
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* FLOSS exception. You should have recieved a copy of the text describing
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* the FLOSS exception, and it is also available here:
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* http://www.alfresco.com/legal/licensing"
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*/
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#ifndef _DataBuffer_H
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#define _DataBuffer_H
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// Includes
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#include "util\DataPacker.h"
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// Classes defined in this header file
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namespace Alfresco {
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class DataBuffer;
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typedef std::auto_ptr<DataBuffer> PTR_DataBuffer;
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}
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// Constants
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namespace Alfresco {
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// Default data buffer size
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#define DataBufferDefaultSize 256
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}
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/**
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* Data Buffer Class
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*
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* Dynamic buffer for getting/setting data blocks.
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*/
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class Alfresco::DataBuffer {
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public:
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// Class constructors
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DataBuffer( unsigned int siz = DataBufferDefaultSize);
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DataBuffer( BUFPTR buf, BUFPOS off, BUFLEN len);
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// Class destructor
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~DataBuffer();
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// Getter methods
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inline BUFPTR getBuffer( void) { return m_buf; }
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BUFLEN getLength( void) const;
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unsigned int getLengthInWords( void) const;
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BUFLEN getAvailableLength( void) const;
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inline BUFLEN getBufferLength(void) const { return m_buflen; }
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inline unsigned int getDisplacement( void) const { return m_pos - m_offset; }
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inline BUFPOS getOffset( void) { return m_offset; }
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inline BUFPOS getPosition( void) { return m_pos; }
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// Get data items from the buffer
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unsigned char getByte( void);
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unsigned int getShort( void);
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unsigned int getInt( void);
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LONG64 getLong( void);
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String getString( bool uni = true);
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String getString( unsigned int maxLen, bool uni = true);
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unsigned int getShortAt( unsigned int idx);
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unsigned int getIntAt( unsigned int idx);
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LONG64 getLongAt( unsigned int idx);
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// Put data items into the buffer
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void putByte( unsigned char byt);
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void putShort( unsigned int sval);
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void putInt( unsigned int ival);
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void putLong( LONG64 lval);
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void putShortAt( unsigned int idx, unsigned int sval);
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void putIntAt( unsigned int idx, unsigned int ival);
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void putLongAt( unsigned int idx, LONG64 lval);
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void putString( const String& str, bool uni = true, bool nulTerm = true);
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void putFixedString( const String& str, unsigned int len);
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BUFPOS putStringAt( const String& str, BUFPOS pos, bool uni = true, bool nulTerm = true);
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BUFPOS putFixedStringAt( const String& str, unsigned int len, BUFPOS pos);
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void putStringPointer( unsigned int off);
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void putZeros( unsigned int cnt);
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// Align the buffer position
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void wordAlign( void);
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void longwordAlign( void);
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// Append a raw data block to the buffer
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void appendData( BUFPTR buf, BUFPOS off, BUFLEN len);
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// Copy the data to the user buffer and update the read position
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unsigned int copyData( BUFPTR buf, BUFPOS pos, unsigned int cnt);
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// Skip data items in the buffer
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void skipBytes( unsigned int len);
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// Setter methods
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inline void setPosition( BUFPOS pos) { m_pos = pos; }
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void setEndOfBuffer( void);
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void setLength( BUFLEN len);
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private:
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// Extend the buffer
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void extendBuffer( BUFLEN ext);
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void extendBuffer( void);
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protected:
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// Instance variables
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//
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// Data buffer
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BUFPTR m_buf;
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unsigned int m_buflen;
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// Flag to indicate if the buffer is owned by this object
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bool m_owner;
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// Buffer positions/offsets
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BUFPOS m_pos;
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BUFPOS m_endpos;
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BUFPOS m_offset;
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};
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#endif
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