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registry.cpp
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C/C++ Source or Header
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1998-03-26
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303 lines
// Registry.cpp - Implementation of registry functions.
//
// This is a part of the Active Template Library.
// Copyright (C) 1996-1998 Microsoft Corporation
// All rights reserved.
//
// This source code is only intended as a supplement to the
// Active Template Library Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding the
// Active Template Library product.
#include <objbase.h>
#include <assert.h>
#include "Registry.h"
#include "util.h"
#include "util.cpp"
////////////////////////////////////////////////////////
//
// Internal helper functions prototypes
//
// Set the given key and its value.
BOOL setKeyAndValue(const char* pszPath,
const char* szSubkey,
const char* szValue,
const char* szName = NULL) ;
// Convert a CLSID into a char string.
void CLSIDtochar( const CLSID& clsid,
char* szCLSID,
int length) ;
// Determine if a particular subkey exists.
BOOL SubkeyExists(const char* pszPath,
const char* szSubkey) ;
// Delete szKeyChild and all of its descendents.
LONG recursiveDeleteKey(HKEY hKeyParent, const char* szKeyChild) ;
/////////////////////////////////////////////////////////
//
// Public function implementation
//
/////////////////////////////////////////////////////////
//
// Register the component in the registry.
//
HRESULT RegisterServer( HMODULE hModule, // DLL module handle
const CLSID& clsid, // Class ID
const char* szFriendlyName, // Friendly Name
const char* szVerIndProgID, // Programmatic
const char* szProgID) // IDs
{
// Get server location.
char szModule[512] ;
DWORD dwResult =
::GetModuleFileName(hModule,
szModule,
sizeof(szModule)/sizeof(char)) ;
assert(dwResult != 0) ;
// Convert a CLSID into a char string.
char szCLSID[CLSID_STRING_SIZE] ;
CLSIDtochar(clsid, szCLSID, sizeof(szCLSID)) ;
// Build the key CLSID\\{...}
char szKey[64] ;
strcpy(szKey, "CLSID\\");
strcat(szKey, szCLSID) ;
// Add the CLSID to the registry.
setKeyAndValue(szKey, NULL, szFriendlyName) ;
// Add server filename key
#ifdef _OUTPROC_SERVER_
setKeyAndValue(szKey, "LocalServer32", szModule) ;
#else
setKeyAndValue(szKey, "InprocServer32", szModule) ;
#endif
// Add the ProgID subkey under the CLSID key.
setKeyAndValue(szKey, "ProgID", szProgID) ;
// Add the version-independent ProgID subkey under CLSID key.
setKeyAndValue( szKey, "VersionIndependentProgID",
szVerIndProgID) ;
// Add the version-independent ProgID subkey under HKEY_CLASSES_ROOT.
setKeyAndValue(szVerIndProgID, NULL, szFriendlyName);
setKeyAndValue(szVerIndProgID, "CLSID", szCLSID) ;
setKeyAndValue(szVerIndProgID, "CurVer", szProgID) ;
// Add the versioned ProgID subkey under HKEY_CLASSES_ROOT.
setKeyAndValue(szProgID, NULL, szFriendlyName);
setKeyAndValue(szProgID, "CLSID", szCLSID) ;
return S_OK;
}
/////////////////////////////////////////////////////////
//
// Remove the component from the registry.
//
LONG UnregisterServer( const CLSID& clsid,
const char* szVerIndProgID,
const char* szProgID)
{
// Convert the CLSID into a char.
char szCLSID[CLSID_STRING_SIZE] ;
CLSIDtochar(clsid, szCLSID, sizeof(szCLSID)) ;
// Build the key CLSID\\{...}
char szKey[80] ;
strcpy(szKey, "CLSID\\");
strcat(szKey, szCLSID) ;
// Check for a another server for this component.
#ifdef _OUTPROC_SERVER_
if (SubkeyExists(szKey, "InprocServer32"))
#else
if (SubkeyExists(szKey, "LocalServer32"))
#endif
{
// Delete only the path for this server.
#ifdef _OUTPROC_SERVER_
strcat(szKey, "\\LocalServer32") ;
#else
strcat(szKey, "\\InprocServer32") ;
#endif
LONG lResult = recursiveDeleteKey(HKEY_CLASSES_ROOT, szKey) ;
assert(lResult == ERROR_SUCCESS) ;
}
else
{
// Delete all related keys.
// Delete the CLSID Key - CLSID\{...}
LONG lResult = recursiveDeleteKey(HKEY_CLASSES_ROOT, szKey) ;
assert((lResult == ERROR_SUCCESS) ||
(lResult == ERROR_FILE_NOT_FOUND)) ; // Subkey may not exist.
// Delete the version-independent ProgID Key.
lResult = recursiveDeleteKey(HKEY_CLASSES_ROOT, szVerIndProgID) ;
assert((lResult == ERROR_SUCCESS) ||
(lResult == ERROR_FILE_NOT_FOUND)) ; // Subkey may not exist.
// Delete the ProgID key.
lResult = recursiveDeleteKey(HKEY_CLASSES_ROOT, szProgID) ;
assert((lResult == ERROR_SUCCESS) ||
(lResult == ERROR_FILE_NOT_FOUND)) ; // Subkey may not exist.
}
return S_OK;
}
///////////////////////////////////////////////////////////
//
// Internal helper functions
//
/////////////////////////////////////////////////////////
//
// Convert a CLSID to a char string.
//
void CLSIDtochar( const CLSID& clsid,
char* szCLSID,
int length)
{
assert(length >= CLSID_STRING_SIZE) ;
// Get CLSID
LPOLESTR wszCLSID = NULL ;
HRESULT hr = StringFromCLSID(clsid, &wszCLSID) ;
assert(SUCCEEDED(hr)) ;
// Convert from wide characters to non-wide characters.
wcstombs(szCLSID, wszCLSID, length);
// Free memory.
CoTaskMemFree(wszCLSID) ;
}
/////////////////////////////////////////////////////////
//
// Delete a key and all of its descendents.
//
LONG recursiveDeleteKey(HKEY hKeyParent, // Parent of key to delete.
const char* lpszKeyChild) // Key to delete.
{
// Open the child.
HKEY hKeyChild;
LONG lRes = RegOpenKeyEx( hKeyParent, lpszKeyChild, 0,
KEY_ALL_ACCESS, &hKeyChild);
if (lRes != ERROR_SUCCESS)
{
return lRes;
}
// Enumerate all of the decendents of this child.
FILETIME time;
char szBuffer[256];
DWORD dwSize = 256;
while (RegEnumKeyEx(hKeyChild, 0, szBuffer, &dwSize, NULL,
NULL, NULL, &time) == S_OK)
{
// Delete the decendents of this child.
lRes = recursiveDeleteKey(hKeyChild, szBuffer);
if (lRes != ERROR_SUCCESS)
{
// Cleanup before exiting.
RegCloseKey(hKeyChild);
return lRes;
}
dwSize = 256;
}
// Close the child.
RegCloseKey(hKeyChild);
// Delete this child.
return RegDeleteKey(hKeyParent, lpszKeyChild);
}
/////////////////////////////////////////////////////////
//
// Determine if a particular subkey exists.
//
BOOL SubkeyExists(const char* pszPath, // Path of key to check
const char* szSubkey) // Key to check
{
HKEY hKey ;
char szKeyBuf[80] ;
// Copy keyname into buffer.
strcpy(szKeyBuf, pszPath) ;
// Add subkey name to buffer.
if (szSubkey != NULL)
{
strcat(szKeyBuf, "\\") ;
strcat(szKeyBuf, szSubkey ) ;
}
// Determine if key exists by trying to open it.
LONG lResult = ::RegOpenKeyEx(HKEY_CLASSES_ROOT,
szKeyBuf,
0,
KEY_ALL_ACCESS,
&hKey) ;
if (lResult == ERROR_SUCCESS)
{
RegCloseKey(hKey) ;
return TRUE ;
}
return FALSE ;
}
/////////////////////////////////////////////////////////
//
// Create a key and set its value.
//
// This helper function was borrowed and modifed from Kraig Brockschmidt's
// book Inside OLE.
//
BOOL setKeyAndValue(const char* szKey,
const char* szSubkey,
const char* szValue,
const char* szName)
{
HKEY hKey;
char szKeyBuf[1024] ;
// Copy keyname into buffer.
strcpy(szKeyBuf, szKey);
// Add subkey name to buffer.
if (szSubkey != NULL)
{
strcat(szKeyBuf, "\\");
strcat(szKeyBuf, szSubkey );
}
// Create and open key and subkey.
long lResult = RegCreateKeyEx( HKEY_CLASSES_ROOT,
szKeyBuf,
0, NULL, REG_OPTION_NON_VOLATILE,
KEY_ALL_ACCESS, NULL,
&hKey, NULL) ;
if (lResult != ERROR_SUCCESS)
{
return FALSE ;
}
// Set the Value.
if (szValue != NULL)
{
RegSetValueEx(hKey, szName, 0, REG_SZ,
(BYTE *)szValue,
strlen(szValue)+1);
}
RegCloseKey(hKey);
return TRUE;
}