56dc1ffd50
Fixed wxStreamBuffer to support features of wxMemoryOutputStream wxMMedia2 updates (various fixes) git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4406 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
118 lines
2.7 KiB
C++
118 lines
2.7 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// Name: mstream.cpp
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// Purpose: "Memory stream" classes
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// Author: Guilhem Lavaux
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// Modified by:
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// Created: 04/01/98
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// RCS-ID: $Id$
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// Copyright: (c) Guilhem Lavaux
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// Licence: wxWindows license
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/////////////////////////////////////////////////////////////////////////////
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#ifdef __GNUG__
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#pragma implementation "mstream.h"
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#endif
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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 <stdlib.h>
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#include "wx/stream.h"
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#include "wx/mstream.h"
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// ----------------------------------------------------------------------------
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// wxMemoryInputStream
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// ----------------------------------------------------------------------------
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wxMemoryInputStream::wxMemoryInputStream(const char *data, size_t len)
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: wxInputStream()
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{
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m_i_streambuf = new wxStreamBuffer(wxStreamBuffer::read);
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m_i_streambuf->SetBufferIO((char*) data, (char*) (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()
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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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return m_i_streambuf->GetBufferStart()[m_i_streambuf->GetIntPosition()];
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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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m_lastcount = 0;
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return m_i_streambuf->Read(buffer, nbytes);
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}
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off_t wxMemoryInputStream::OnSysSeek(off_t 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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off_t 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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wxMemoryOutputStream::wxMemoryOutputStream(char *data, size_t len)
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: wxOutputStream()
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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, 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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m_lastcount = 0;
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return m_o_streambuf->Write(buffer, nbytes);
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}
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off_t wxMemoryOutputStream::OnSysSeek(off_t 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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off_t 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(char *buffer, size_t len) const
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{
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if (!buffer)
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return 0;
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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
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