/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
/* libwpd
* Version: MPL 2.0 / LGPLv2.1+
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* Major Contributor(s):
* Copyright (C) 2004-2005 William Lachance (wrlach@gmail.com)
* Copyright (C) 2006 Fridrich Strba (fridrich.strba@bluewin.ch)
*
* For minor contributions see the git repository.
*
* Alternatively, the contents of this file may be used under the terms
* of the GNU Lesser General Public License Version 2.1 or later
* (LGPLv2.1+), in which case the provisions of the LGPLv2.1+ are
* applicable instead of those above.
*
* For further information visit http://libwpd.sourceforge.net
*/
/* "This product is not manufactured, approved, or supported by
* Corel Corporation or Corel Corporation Limited."
*/
#include "WPXMemoryStream.h"
#include "libwpd_internal.h"
WPXMemoryInputStream::WPXMemoryInputStream(unsigned char *data, unsigned long size) :
librevenge::RVNGInputStream(),
m_offset(0),
m_size(size),
m_data(data)
{
}
WPXMemoryInputStream::~WPXMemoryInputStream()
{
}
const unsigned char *WPXMemoryInputStream::read(unsigned long numBytes, unsigned long &numBytesRead)
{
numBytesRead = 0;
if (numBytes == 0)
return nullptr;
long numBytesToRead;
if ((m_offset+numBytes) < m_size)
numBytesToRead = numBytes;
else
numBytesToRead = m_size - m_offset;
numBytesRead = numBytesToRead; // about as paranoid as we can be..
if (numBytesToRead == 0)
return nullptr;
long oldOffset = m_offset;
m_offset += numBytesToRead;
return &m_data[oldOffset];
}
int WPXMemoryInputStream::seek(long offset, librevenge::RVNG_SEEK_TYPE seekType)
{
if (seekType == librevenge::RVNG_SEEK_CUR)
m_offset += offset;
else if (seekType == librevenge::RVNG_SEEK_SET)
m_offset = offset;
else if (seekType == librevenge::RVNG_SEEK_END)
m_offset = m_size+offset;
if (m_offset < 0)
{
m_offset = 0;
return 1;
}
if ((long)m_offset > (long)m_size)
{
m_offset = m_size;
return 1;
}
return 0;
}
long WPXMemoryInputStream::tell()
{
return m_offset;
}
bool WPXMemoryInputStream::isEnd()
{
if ((long)m_offset == (long)m_size)
return true;
return false;
}
/* vim:set shiftwidth=4 softtabstop=4 noexpandtab: */