gecko-dev/mailnews/import/oexpress/nsOERegUtil.cpp

86 строки
2.7 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "License"); you may not use this file except in
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*
* Software distributed under the License is distributed on an "AS IS" basis,
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* 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.
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* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either 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
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#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;
}