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lightning-sunbird  0.9+nobinonly
nsInstallBitwise.cpp
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00001 /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
00002 /* ***** BEGIN LICENSE BLOCK *****
00003  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00004  *
00005  * The contents of this file are subject to the Mozilla Public License Version
00006  * 1.1 (the "License"); you may not use this file except in compliance with
00007  * the License. You may obtain a copy of the License at
00008  * http://www.mozilla.org/MPL/
00009  *
00010  * Software distributed under the License is distributed on an "AS IS" basis,
00011  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00012  * for the specific language governing rights and limitations under the
00013  * License.
00014  *
00015  * The Original Code is Mozilla Communicator client code, released March 31,  
00016  * 1998.
00017  *
00018  * The Initial Developer of the Original Code is
00019  * Netscape Communications Corporation.
00020  * Portions created by the Initial Developer are Copyright (C) 1998
00021  * the Initial Developer. All Rights Reserved.
00022  *
00023  * Contributor(s):
00024  *   Sean Su <ssu@netscape.com>
00025  *
00026  * Alternatively, the contents of this file may be used under the terms of
00027  * either the GNU General Public License Version 2 or later (the "GPL"), or
00028  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00029  * in which case the provisions of the GPL or the LGPL are applicable instead
00030  * of those above. If you wish to allow use of your version of this file only
00031  * under the terms of either the GPL or the LGPL, and not to allow others to
00032  * use your version of this file under the terms of the MPL, indicate your
00033  * decision by deleting the provisions above and replace them with the notice
00034  * and other provisions required by the GPL or the LGPL. If you do not delete
00035  * the provisions above, a recipient may use your version of this file under
00036  * the terms of any one of the MPL, the GPL or the LGPL.
00037  *
00038  * ***** END LICENSE BLOCK ***** */
00039 
00040 #include "nscore.h"
00041 #include "nsInstall.h" // for error codes
00042 #include "prmem.h"
00043 #include "nsInstallBitwise.h"
00044 
00045 #ifdef _WINDOWS
00046 #include <windows.h>
00047 #include <winreg.h>
00048 #endif
00049 
00050 #define KEY_SHARED_DLLS "Software\\Microsoft\\Windows\\CurrentVersion\\SharedDlls"
00051 
00052 PRInt32 RegisterSharedFile(const char *file, PRBool bAlreadyExists)
00053 {
00054   PRInt32 rv = nsInstall::SUCCESS;
00055 
00056 #ifdef WIN32
00057   HKEY     root;
00058   HKEY     keyHandle = 0;
00059   LONG     result;
00060   DWORD    type = REG_DWORD;
00061   DWORD    dwDisposition;
00062   PRUint32 valbuf = 0;
00063   PRUint32 valbufsize;
00064 
00065   valbufsize = sizeof(PRUint32);
00066   root       = HKEY_LOCAL_MACHINE;
00067   result     = RegCreateKeyEx(root, KEY_SHARED_DLLS, 0, nsnull, REG_OPTION_NON_VOLATILE, KEY_READ | KEY_WRITE, nsnull, &keyHandle, &dwDisposition);
00068   if(ERROR_SUCCESS == result)
00069   {
00070     result = RegQueryValueEx(keyHandle, file, nsnull, &type, (LPBYTE)&valbuf, (LPDWORD)&valbufsize);
00071 
00072     if((ERROR_SUCCESS == result) && (type == REG_DWORD))
00073       ++valbuf;
00074     else
00075     {
00076       valbuf = 1;
00077       if(bAlreadyExists == PR_TRUE)
00078         ++valbuf;
00079     }
00080 
00081     RegSetValueEx(keyHandle, file, 0, REG_DWORD, (LPBYTE)&valbuf, valbufsize);
00082     RegCloseKey(keyHandle);
00083   }
00084   else
00085     rv = nsInstall::UNEXPECTED_ERROR;
00086 
00087 #endif
00088 
00089   return(rv);
00090 }
00091