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Import r67258 of the wxWidgets trunk, which I expect will before
long become wxWidgets 2.9.2, which in turn is expected to be the last 2.9 release before the 3.0 stable release. Since the full wxWidgets distribution is rather large, I have imported only the parts that we use, on a subdirectory basis: art include/wx/*.* include/wx/aui include/wx/cocoa include/wx/generic include/wx/gtk include/wx/meta include/wx/msw include/wx/osx include/wx/persist include/wx/private include/wx/protocol include/wx/unix src/aui src/common src/generic src/gtk src/msw src/osx src/unix git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@7380 8ced0084-cf51-0410-be5f-012b33b47a6e
This commit is contained in:
Soren Jorvang
207
Externals/wxWidgets3/src/common/mstream.cpp
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207
Externals/wxWidgets3/src/common/mstream.cpp
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/////////////////////////////////////////////////////////////////////////////
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// Name: src/common/mstream.cpp
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// Purpose: "Memory stream" classes
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// Author: Guilhem Lavaux
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// Modified by: VZ (23.11.00): general code review
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// Created: 04/01/98
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// RCS-ID: $Id: mstream.cpp 65861 2010-10-22 14:17:30Z VZ $
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// Copyright: (c) Guilhem Lavaux
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// Licence: wxWindows licence
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/////////////////////////////////////////////////////////////////////////////
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// ============================================================================
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// declarations
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// ============================================================================
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// ----------------------------------------------------------------------------
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// headers
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// ----------------------------------------------------------------------------
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// For compilers that support precompilation, includes "wx.h".
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#include "wx/wxprec.h"
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#ifdef __BORLANDC__
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#pragma hdrstop
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#endif
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#if wxUSE_STREAMS
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#include "wx/mstream.h"
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#ifndef WX_PRECOMP
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#include "wx/stream.h"
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#endif //WX_PRECOMP
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#include <stdlib.h>
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// ============================================================================
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// implementation
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// ============================================================================
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// ----------------------------------------------------------------------------
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// wxMemoryInputStream
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// ----------------------------------------------------------------------------
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IMPLEMENT_ABSTRACT_CLASS(wxMemoryInputStream, wxInputStream)
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wxMemoryInputStream::wxMemoryInputStream(const void *data, size_t len)
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{
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m_i_streambuf = new wxStreamBuffer(wxStreamBuffer::read);
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m_i_streambuf->SetBufferIO(const_cast<void *>(data), len);
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m_i_streambuf->SetIntPosition(0); // seek to start pos
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m_i_streambuf->Fixed(true);
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m_length = len;
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}
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wxMemoryInputStream::wxMemoryInputStream(const wxMemoryOutputStream& stream)
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{
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const wxFileOffset lenFile = stream.GetLength();
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if ( lenFile == wxInvalidOffset )
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{
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m_i_streambuf = NULL;
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m_lasterror = wxSTREAM_EOF;
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return;
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}
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const size_t len = wx_truncate_cast(size_t, lenFile);
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wxASSERT_MSG( len == lenFile + size_t(0), wxT("huge files not supported") );
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m_i_streambuf = new wxStreamBuffer(wxStreamBuffer::read);
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m_i_streambuf->SetBufferIO(len); // create buffer
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stream.CopyTo(m_i_streambuf->GetBufferStart(), len);
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m_i_streambuf->SetIntPosition(0); // seek to start pos
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m_i_streambuf->Fixed(true);
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m_length = len;
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}
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void
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wxMemoryInputStream::InitFromStream(wxInputStream& stream, wxFileOffset lenFile)
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{
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if ( lenFile == wxInvalidOffset )
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lenFile = stream.GetLength();
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if ( lenFile == wxInvalidOffset )
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{
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m_i_streambuf = NULL;
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m_lasterror = wxSTREAM_EOF;
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return;
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}
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const size_t len = wx_truncate_cast(size_t, lenFile);
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wxASSERT_MSG( (wxFileOffset)len == lenFile, wxT("huge files not supported") );
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m_i_streambuf = new wxStreamBuffer(wxStreamBuffer::read);
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m_i_streambuf->SetBufferIO(len); // create buffer
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stream.Read(m_i_streambuf->GetBufferStart(), len);
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m_i_streambuf->SetIntPosition(0); // seek to start pos
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m_i_streambuf->Fixed(true);
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m_length = stream.LastRead();
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}
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bool wxMemoryInputStream::CanRead() const
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{
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return m_i_streambuf->GetIntPosition() != m_length;
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}
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wxMemoryInputStream::~wxMemoryInputStream()
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{
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delete m_i_streambuf;
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}
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char wxMemoryInputStream::Peek()
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{
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char *buf = (char *)m_i_streambuf->GetBufferStart();
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size_t pos = m_i_streambuf->GetIntPosition();
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if ( pos == m_length )
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{
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m_lasterror = wxSTREAM_READ_ERROR;
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return 0;
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}
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return buf[pos];
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}
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size_t wxMemoryInputStream::OnSysRead(void *buffer, size_t nbytes)
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{
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size_t pos = m_i_streambuf->GetIntPosition();
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if ( pos == m_length )
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{
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m_lasterror = wxSTREAM_EOF;
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return 0;
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}
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m_i_streambuf->Read(buffer, nbytes);
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m_lasterror = wxSTREAM_NO_ERROR;
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return m_i_streambuf->GetIntPosition() - pos;
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}
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wxFileOffset wxMemoryInputStream::OnSysSeek(wxFileOffset pos, wxSeekMode mode)
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{
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return m_i_streambuf->Seek(pos, mode);
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}
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wxFileOffset wxMemoryInputStream::OnSysTell() const
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{
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return m_i_streambuf->Tell();
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}
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// ----------------------------------------------------------------------------
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// wxMemoryOutputStream
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// ----------------------------------------------------------------------------
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IMPLEMENT_DYNAMIC_CLASS(wxMemoryOutputStream, wxOutputStream)
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wxMemoryOutputStream::wxMemoryOutputStream(void *data, size_t len)
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{
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m_o_streambuf = new wxStreamBuffer(wxStreamBuffer::write);
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if ( data )
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m_o_streambuf->SetBufferIO(data, len);
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m_o_streambuf->Fixed(false);
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m_o_streambuf->Flushable(false);
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}
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wxMemoryOutputStream::~wxMemoryOutputStream()
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{
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delete m_o_streambuf;
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}
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size_t wxMemoryOutputStream::OnSysWrite(const void *buffer, size_t nbytes)
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{
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size_t oldpos = m_o_streambuf->GetIntPosition();
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m_o_streambuf->Write(buffer, nbytes);
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size_t newpos = m_o_streambuf->GetIntPosition();
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// FIXME can someone please explain what this does? (VZ)
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if ( !newpos )
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newpos = m_o_streambuf->GetBufferSize();
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return newpos - oldpos;
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}
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wxFileOffset wxMemoryOutputStream::OnSysSeek(wxFileOffset pos, wxSeekMode mode)
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{
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return m_o_streambuf->Seek(pos, mode);
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}
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wxFileOffset wxMemoryOutputStream::OnSysTell() const
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{
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return m_o_streambuf->Tell();
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}
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size_t wxMemoryOutputStream::CopyTo(void *buffer, size_t len) const
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{
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wxCHECK_MSG( buffer, 0, wxT("must have buffer to CopyTo") );
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if ( len > GetSize() )
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len = GetSize();
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memcpy(buffer, m_o_streambuf->GetBufferStart(), len);
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return len;
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}
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#endif // wxUSE_STREAMS
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