280 lines
7.7 KiB
C
280 lines
7.7 KiB
C
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//+---------------------------------------------------------------------------
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//
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// Microsoft Windows
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// Copyright (C) Microsoft Corporation, 1999.
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//
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// File: E C O M P . H
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//
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// Contents: Implements the interface to a component's external data.
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// External data is that data controlled (or placed) by
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// PnP or the network class installer. Everything under a
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// component's instance key is considered external data.
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// (Internal data is that data we store in the persisted binary
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// for the network configuration. See persist.cpp for
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// code that deals with internal data.)
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//
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// Notes:
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//
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// Author: shaunco 15 Jan 1999
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//
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//----------------------------------------------------------------------------
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#pragma once
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#include "ncmisc.h"
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#define ECD_OFFSET(_p) (UINT)FIELD_OFFSET(CExternalComponentData, _p)
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class CExternalComponentData
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{
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friend class CImplINetCfgComponent;
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private:
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// The data buffer into which subsequent member pointers will point.
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// Always freed.
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//
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PVOID m_pvBuffer;
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// For enumerated components, this is the 'DriverDesc' value from PnP.
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// For non-enumerated components, this is read from the instance key.
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// In both cases, this is the localizable string value that comes from
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// the component's INF. It is displayed as the component's
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// display name in any UI. Note that this is the only member which
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// can be changed. Therefore, it does not point into the same buffer
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// which all the others point. Freed if it does not point into
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// m_pvBuffer.
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//
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PCWSTR m_pszDescription;
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// The CLSID of the component's notify object. Will be NULL in
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// the case the component does not have a notify object. Never freed.
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//
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const GUID* m_pNotifyObjectClsid;
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// The component's primary service. Will be NULL if the component does
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// not have a service. Never freed.
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//
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PCWSTR m_pszService;
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// The component's list of co-services as a multi-sz. Will be NULL
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// if the component does not have any co-services. Never freed.
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//
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PCWSTR m_pmszCoServices;
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// The component's bind form. Will be NULL if the component takes the
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// default bindform. Never freed.
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//
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PCWSTR m_pszBindForm;
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// The component's help text. Will be NULL if the component does not
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// have any help text. (Not recommened for visible component's)
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// Never freed.
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//
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PCWSTR m_pszHelpText;
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// Comma-separated list of sub-strings that are the
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// lower-edge binding interfaces. Never freed.
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//
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PCWSTR m_pszLowerRange;
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// Comma-separated list of sub-strings that are the
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// upper-edge binding interfaces.
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//
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PCWSTR m_pszUpperRange;
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// Comma-separated list of sub-strings that are the excluded
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// binding interfaces.
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//
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PCWSTR m_pszLowerExclude;
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// Comma-separated list of sub-strings that are the media types supported
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// by this filter component. (Only valid for filters.)
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//
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PCWSTR m_pszFilterMediaTypes;
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// This pointer is just so that we have an upper bound on the pointers
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// that point into m_pvBuffer. We use this knowledge to know
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// whether or not to free m_pszDescription as it may not be
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// pointing somewhere in this buffer for the case when it has been
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// changed and hence uses its own allocation.
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//
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PVOID m_pvBufferLast;
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// The bindname for the component. This is built from BindForm,
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// Class, Character, ServiceName, InfId, and InstanceGuid.
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// It is a seaparate allocation made with LocalAlloc (because
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// FormatMessage is used to build it.) Freed with LocalFree.
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//
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PCWSTR m_pszBindName;
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// The result of HrEnsureExternalDataLoaded. It is saved, so that on
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// subsequent calls, we return the same result we did the first time.
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//
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HRESULT m_hrLoadResult;
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// FALSE until HrEnsureExternalDataLoaded is called. TRUE thereafter
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// which prevents HrEnsureExternalDataLoaded from hitting the registry
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// again. Indicates all of the other members are cached and valid.
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//
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BOOLEAN m_fInitialized;
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private:
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HRESULT
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HrLoadData (
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IN HKEY hkeyInstance,
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OUT BYTE* pbBuf OPTIONAL,
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IN OUT ULONG* pcbBuf);
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VOID
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FreeDescription ();
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VOID
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FreeExternalData ();
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public:
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~CExternalComponentData ()
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{
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FreeExternalData ();
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}
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HRESULT
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HrEnsureExternalDataLoaded ();
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HRESULT
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HrReloadExternalData ();
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HRESULT
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HrSetDescription (
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PCWSTR pszNewDescription);
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BOOL
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FHasNotifyObject () const
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{
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AssertH (m_fInitialized && (S_OK == m_hrLoadResult));
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return (NULL != m_pNotifyObjectClsid);
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}
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BOOL
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FLoadedOkayIfLoadedAtAll () const;
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const CLSID*
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PNotifyObjectClsid () const
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{
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AssertH (m_fInitialized && (S_OK == m_hrLoadResult));
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AssertH (m_pNotifyObjectClsid);
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return m_pNotifyObjectClsid;
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}
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PCWSTR
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PszAtOffset (
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IN UINT unOffset) const
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{
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AssertH (
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(ECD_OFFSET(m_pszDescription) == unOffset) ||
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(ECD_OFFSET(m_pszService) == unOffset) ||
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(ECD_OFFSET(m_pszBindForm) == unOffset) ||
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(ECD_OFFSET(m_pszHelpText) == unOffset) ||
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(ECD_OFFSET(m_pszLowerRange) == unOffset) ||
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(ECD_OFFSET(m_pszUpperRange) == unOffset) ||
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(ECD_OFFSET(m_pszBindName) == unOffset));
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PCWSTR psz;
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psz = *(PCWSTR*)((BYTE*)this + unOffset);
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AssertH (
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(m_pszDescription == psz) ||
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(m_pszService == psz) ||
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(m_pszBindForm == psz) ||
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(m_pszHelpText == psz) ||
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(m_pszLowerRange == psz) ||
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(m_pszLowerRange == psz) ||
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(m_pszBindName == psz));
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return psz;
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}
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PCWSTR
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PszBindForm () const
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{
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AssertH (m_fInitialized && (S_OK == m_hrLoadResult));
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return m_pszBindForm;
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}
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PCWSTR
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PszBindName () const
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{
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AssertH (m_fInitialized && (S_OK == m_hrLoadResult));
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AssertH (m_pszBindName && *m_pszBindName);
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return m_pszBindName;
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}
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PCWSTR
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PszDescription () const
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{
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AssertH (m_fInitialized && (S_OK == m_hrLoadResult));
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return m_pszDescription;
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}
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PCWSTR
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PszHelpText () const
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{
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AssertH (m_fInitialized && (S_OK == m_hrLoadResult));
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return m_pszHelpText;
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}
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PCWSTR
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PszService () const
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{
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AssertH (m_fInitialized && (S_OK == m_hrLoadResult));
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return m_pszService;
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}
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PCWSTR
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PszCoServices () const
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{
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AssertH (m_fInitialized && (S_OK == m_hrLoadResult));
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return m_pmszCoServices;
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}
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PCWSTR
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PszFilterMediaTypes () const
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{
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AssertH (m_fInitialized && (S_OK == m_hrLoadResult));
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return m_pszFilterMediaTypes;
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}
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PCWSTR
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PszLowerRange () const
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{
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AssertH (m_fInitialized && (S_OK == m_hrLoadResult));
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return (m_pszLowerRange) ? m_pszLowerRange : L"";
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}
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PCWSTR
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PszLowerExclude () const
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{
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AssertH (m_fInitialized && (S_OK == m_hrLoadResult));
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return m_pszLowerExclude;
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}
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PCWSTR
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PszUpperRange () const
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{
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AssertH (m_fInitialized && (S_OK == m_hrLoadResult));
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return (m_pszUpperRange) ? m_pszUpperRange : L"";
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}
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#if DBG
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BOOL DbgIsExternalDataLoaded () const
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{
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return m_fInitialized && (S_OK == m_hrLoadResult);
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}
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VOID DbgVerifyExternalDataLoaded () const
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{
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AssertH (DbgIsExternalDataLoaded());
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}
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#else
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BOOL DbgIsExternalDataLoaded () const { return TRUE; }
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VOID DbgVerifyExternalDataLoaded () const {}
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#endif
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};
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