127 lines
2.9 KiB
C++
127 lines
2.9 KiB
C++
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/*
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Copyright (c) 1998-1999 Microsoft Corporation
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Module Name:
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blbsdp.cpp
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Abstract:
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Author:
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*/
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#include "stdafx.h"
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#include "blbgen.h"
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#include "blbsdp.h"
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const CHAR g_CharSetString[] = "\na=charset:";
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HRESULT
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SDP_BLOB::SetBstr(
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IN BSTR SdpPacketBstr
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)
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{
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// convert string to ANSI using the optional bstr base class
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HRESULT HResult = SDP_BSTRING::SetBstr(SdpPacketBstr);
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BAIL_ON_FAILURE(HResult);
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// parse the ANSI character string
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if ( !ParseSdpPacket(
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SDP_BSTRING::GetCharacterString(),
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SDP_BSTRING::GetCharacterSet()
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) )
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{
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return HRESULT_FROM_ERROR_CODE(GetLastError());
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}
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return S_OK;
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}
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HRESULT
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SDP_BLOB::SetTstr(
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IN TCHAR *SdpPacketTstr
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)
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{
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ASSERT(NULL != SdpPacketTstr);
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#ifdef _UNICODE // TCHAR is WCHAR
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BSTR SdpPacketBstr = SysAllocString(SdpPacketTstr);
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BAIL_IF_NULL(SdpPacketBstr, E_OUTOFMEMORY);
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HRESULT HResult = SetBstr(SdpPacketBstr);
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SysFreeString(SdpPacketBstr);
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return HResult;
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#else // TCHAR is CHAR
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// parse the ANSI character string
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if ( !ParseSdpPacket(SdpPacketTstr) )
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{
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return HRESULT_FROM_ERROR_CODE(GetLastError());
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}
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// associate the character string with the SDP_BSTRING base instance
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// *** need a SetCharacterStringByPtr for optimizing this copy
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if ( !SDP_BSTRING::SetCharacterStringByCopy(SdpPacketTstr) )
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{
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return HRESULT_FROM_ERROR_CODE(GetLastError());
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}
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return S_OK;
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#endif // _UNICODE
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// should never reach here
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ASSERT(FALSE);
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return S_OK;
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}
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HRESULT
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SDP_BLOB::GetBstr(
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OUT BSTR *SdpPacketBstr
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)
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{
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if ( !SDP::IsValid() )
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{
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return HRESULT_FROM_WIN32(ERROR_INVALID_DATA);
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}
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// keep track of the old SDP packet pointer for a check below because we may reallocate m_SdpPacket
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// in the call to GenerateSdpPacket, but we may have a pointer to the old SDP packet stored as a
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// string by reference. If this is the case we need to be sure to SetCharacterStringByReference(m_SdpPacket).
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CHAR * OldSdpPacket = m_SdpPacket;
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// generate the character string SDP packet
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if ( !SDP::GenerateSdpPacket() )
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{
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return HRESULT_FROM_ERROR_CODE(GetLastError());
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}
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// check if the sdp packet has changed since last time
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// ZoltanS: if the pointers are equal, we have no way of knowing
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// without doing Unicode-to-ASCII conversion; always reassociate.
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char * pszBstrVersion = SDP_BSTRING::GetCharacterString();
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if( NULL == pszBstrVersion )
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{
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return E_OUTOFMEMORY;
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}
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if ( ( pszBstrVersion == m_SdpPacket ) || ( pszBstrVersion == OldSdpPacket ) || strcmp(pszBstrVersion, m_SdpPacket) )
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{
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// associate the optional bstr instance with the sdp packet character string
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SDP_BSTRING::SetCharacterStringByReference(m_SdpPacket);
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}
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return SDP_BSTRING::GetBstr(SdpPacketBstr);
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}
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