gecko-dev/mailnews/import/oexpress/nsOERegUtil.cpp
2004-04-17 18:33:16 +00:00

86 lines
2.7 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsOERegUtil.h"
#include "OEDebugLog.h"
BYTE * nsOERegUtil::GetValueBytes( HKEY hKey, const char *pValueName)
{
LONG err;
DWORD bufSz;
LPBYTE pBytes = NULL;
DWORD type = 0;
err = ::RegQueryValueEx( hKey, pValueName, NULL, &type, NULL, &bufSz);
if (err == ERROR_SUCCESS) {
pBytes = new BYTE[bufSz];
err = ::RegQueryValueEx( hKey, pValueName, NULL, NULL, pBytes, &bufSz);
if (err != ERROR_SUCCESS) {
delete [] pBytes;
pBytes = NULL;
}
else {
if (type == REG_EXPAND_SZ) {
DWORD sz = bufSz;
LPBYTE pExpand = NULL;
DWORD rSz;
do {
if (pExpand)
delete [] pExpand;
sz += 1024;
pExpand = new BYTE[sz];
rSz = ::ExpandEnvironmentStrings( (LPCSTR) pBytes, (LPSTR) pExpand, sz);
} while (rSz > sz);
delete [] pBytes;
return( pExpand);
}
}
}
return( pBytes);
}
void nsOERegUtil::FreeValueBytes( BYTE *pBytes)
{
if (pBytes)
delete [] pBytes;
}