68 lines
2.5 KiB
C
68 lines
2.5 KiB
C
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// Copyright (c) 2000 Microsoft Corporation. All rights reserved.
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//
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// Declaration of CSourceText.
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//
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// This is a DirectMusic object whose sole purpose is to load a plain text file and return the text.
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// It is used by the CDirectMusicScript object to read its source code from a separate non-riff text file.
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#pragma once
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//////////////////////////////////////////////////////////////////////
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// Interface for getting the text
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extern const GUID CLSID_DirectMusicSourceText;
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extern const GUID IID_IDirectMusicSourceText;
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#undef INTERFACE
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#define INTERFACE IDirectMusicSourceText
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DECLARE_INTERFACE_(IDirectMusicSourceText, IUnknown)
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{
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STDMETHOD_(void, GetTextLength)(DWORD *pcwchRequiredBufferSize); // size of buffer to allocate (includes a space for the terminator)
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STDMETHOD_(void, GetText)(WCHAR *pwszText); // buffer must be of size from GetTextLength
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};
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//////////////////////////////////////////////////////////////////////
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// The object iteself
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// <20><> Does this object need a critical section? GetObject should serialize access and nobody but the
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// script can hold onto it.
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class CSourceText
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: public IDirectMusicSourceText,
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public IPersistStream,
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public IDirectMusicObject
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{
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public:
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static HRESULT CreateInstance(IUnknown* pUnknownOuter, const IID& iid, void** ppv);
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// IUnknown
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STDMETHOD(QueryInterface)(const IID &iid, void **ppv);
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STDMETHOD_(ULONG, AddRef)();
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STDMETHOD_(ULONG, Release)();
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// IPersistStream functions (only Load is implemented)
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STDMETHOD(GetClassID)(CLSID* pClassID) {return E_NOTIMPL;}
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STDMETHOD(IsDirty)() {return S_FALSE;}
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STDMETHOD(Load)(IStream* pStream);
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STDMETHOD(Save)(IStream* pStream, BOOL fClearDirty) {return E_NOTIMPL;}
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STDMETHOD(GetSizeMax)(ULARGE_INTEGER* pcbSize) {return E_NOTIMPL;}
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// IDirectMusicObject
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// (This interface must exist in order for the object to be loaded, but the methods aren't actually
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// implemented to provide/save any information.)
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STDMETHOD(GetDescriptor)(LPDMUS_OBJECTDESC pDesc) { pDesc->dwValidData = 0; return S_OK; }
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STDMETHOD(SetDescriptor)(LPDMUS_OBJECTDESC pDesc) { return S_OK; }
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STDMETHOD(ParseDescriptor)(LPSTREAM pStream, LPDMUS_OBJECTDESC pDesc) { pDesc->dwValidData = 0; return S_OK; }
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// IDirectMusicSourceText
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STDMETHOD_(void, GetTextLength)(DWORD *pcwchRequiredBufferSize); // size of buffer to allocate (includes a space for the terminator)
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STDMETHOD_(void, GetText)(WCHAR *pwszText); // buffer must be of size from GetTextLength
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private:
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CSourceText();
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long m_cRef;
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SmartRef::WString m_wstrText;
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DWORD m_cwchText;
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};
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