зеркало из https://github.com/mozilla/gecko-dev.git
534 строки
14 KiB
C++
534 строки
14 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Google Inc.
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* Portions created by the Initial Developer are Copyright (C) 2005
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Darin Fisher <darin@meer.net>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include <windows.h>
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#include <shlwapi.h>
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#include <stdlib.h>
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#include "nsWindowsRegKey.h"
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#include "nsString.h"
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#include "nsCOMPtr.h"
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// The Platform SDK included with VC6 does not define REG_QWORD. VC 7's
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// WinNT.h defines REG_QWORD as follows:
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#ifndef REG_QWORD
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# define REG_QWORD 11
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#endif
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//-----------------------------------------------------------------------------
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// According to MSDN, the following limits apply (in characters excluding room
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// for terminating null character):
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#define MAX_KEY_NAME_LEN 255
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#define MAX_VALUE_NAME_LEN 16383
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class nsWindowsRegKey : public nsIWindowsRegKey
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSIWINDOWSREGKEY
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nsWindowsRegKey()
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: mKey(NULL)
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, mWatchEvent(NULL)
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, mWatchRecursive(FALSE)
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{
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}
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private:
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~nsWindowsRegKey()
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{
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Close();
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}
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HKEY mKey;
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HANDLE mWatchEvent;
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BOOL mWatchRecursive;
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};
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NS_IMPL_ISUPPORTS1(nsWindowsRegKey, nsIWindowsRegKey)
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NS_IMETHODIMP
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nsWindowsRegKey::GetKey(HKEY *key)
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{
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*key = mKey;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::SetKey(HKEY key)
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{
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// We do not close the older key!
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StopWatching();
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mKey = key;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::Close()
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{
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StopWatching();
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if (mKey) {
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RegCloseKey(mKey);
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mKey = NULL;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::Open(PRUint32 rootKey, const nsAString &path, PRUint32 mode)
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{
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Close();
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LONG rv = RegOpenKeyExW((HKEY) rootKey, PromiseFlatString(path).get(), 0,
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(REGSAM) mode, &mKey);
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return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::Create(PRUint32 rootKey, const nsAString &path, PRUint32 mode)
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{
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Close();
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DWORD disposition;
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LONG rv = RegCreateKeyExW((HKEY) rootKey, PromiseFlatString(path).get(), 0,
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NULL, REG_OPTION_NON_VOLATILE, (REGSAM) mode, NULL,
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&mKey, &disposition);
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return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::OpenChild(const nsAString &path, PRUint32 mode,
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nsIWindowsRegKey **result)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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nsCOMPtr<nsIWindowsRegKey> child = new nsWindowsRegKey();
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if (!child)
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return NS_ERROR_OUT_OF_MEMORY;
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nsresult rv = child->Open((PRUint32) mKey, path, mode);
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if (NS_FAILED(rv))
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return rv;
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child.swap(*result);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::CreateChild(const nsAString &path, PRUint32 mode,
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nsIWindowsRegKey **result)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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nsCOMPtr<nsIWindowsRegKey> child = new nsWindowsRegKey();
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if (!child)
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return NS_ERROR_OUT_OF_MEMORY;
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nsresult rv = child->Create((PRUint32) mKey, path, mode);
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if (NS_FAILED(rv))
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return rv;
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child.swap(*result);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::GetChildCount(PRUint32 *result)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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DWORD numSubKeys;
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LONG rv = RegQueryInfoKeyW(mKey, NULL, NULL, NULL, &numSubKeys, NULL, NULL,
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NULL, NULL, NULL, NULL, NULL);
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NS_ENSURE_STATE(rv == ERROR_SUCCESS);
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*result = numSubKeys;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::GetChildName(PRUint32 index, nsAString &result)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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FILETIME lastWritten;
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PRUnichar nameBuf[MAX_KEY_NAME_LEN + 1];
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DWORD nameLen = sizeof(nameBuf) / sizeof(nameBuf[0]);
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LONG rv = RegEnumKeyExW(mKey, index, nameBuf, &nameLen, NULL, NULL, NULL,
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&lastWritten);
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if (rv != ERROR_SUCCESS)
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return NS_ERROR_NOT_AVAILABLE; // XXX what's the best error code here?
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result.Assign(nameBuf, nameLen);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::HasChild(const nsAString &name, PRBool *result)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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// Check for the existance of a child key by opening the key with minimal
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// rights. Perhaps there is a more efficient way to do this?
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HKEY key;
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LONG rv = RegOpenKeyExW(mKey, PromiseFlatString(name).get(), 0,
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STANDARD_RIGHTS_READ, &key);
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if (*result = (rv == ERROR_SUCCESS && key))
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RegCloseKey(key);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::GetValueCount(PRUint32 *result)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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DWORD numValues;
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LONG rv = RegQueryInfoKeyW(mKey, NULL, NULL, NULL, NULL, NULL, NULL,
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&numValues, NULL, NULL, NULL, NULL);
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NS_ENSURE_STATE(rv == ERROR_SUCCESS);
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*result = numValues;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::GetValueName(PRUint32 index, nsAString &result)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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PRUnichar nameBuf[MAX_VALUE_NAME_LEN];
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DWORD nameLen = sizeof(nameBuf) / sizeof(nameBuf[0]);
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LONG rv = RegEnumValueW(mKey, index, nameBuf, &nameLen, NULL, NULL, NULL,
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NULL);
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if (rv != ERROR_SUCCESS)
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return NS_ERROR_NOT_AVAILABLE; // XXX what's the best error code here?
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result.Assign(nameBuf, nameLen);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::HasValue(const nsAString &name, PRBool *result)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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LONG rv = RegQueryValueExW(mKey, PromiseFlatString(name).get(), 0, NULL, NULL,
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NULL);
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*result = (rv == ERROR_SUCCESS);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::RemoveChild(const nsAString &name)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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LONG rv = RegDeleteKeyW(mKey, PromiseFlatString(name).get());
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return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::RemoveValue(const nsAString &name)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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LONG rv = RegDeleteValueW(mKey, PromiseFlatString(name).get());
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return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::GetValueType(const nsAString &name, PRUint32 *result)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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LONG rv = RegQueryValueExW(mKey, PromiseFlatString(name).get(), 0,
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(LPDWORD) result, NULL, NULL);
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return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::ReadStringValue(const nsAString &name, nsAString &result)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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DWORD type, size;
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const nsString &flatName = PromiseFlatString(name);
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LONG rv = RegQueryValueExW(mKey, flatName.get(), 0, &type, NULL, &size);
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if (rv != ERROR_SUCCESS)
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return NS_ERROR_FAILURE;
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// This must be a string type in order to fetch the value as a string.
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// We're being a bit forgiving here by allowing types other than REG_SZ.
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NS_ENSURE_STATE(type == REG_SZ ||
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type == REG_EXPAND_SZ ||
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type == REG_MULTI_SZ);
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// The buffer size must be a multiple of 2.
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NS_ENSURE_STATE(size % 2 == 0);
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if (size == 0) {
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result.Truncate();
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return NS_OK;
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}
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// |size| includes room for the terminating null character
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DWORD resultLen = size / 2 - 1;
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result.SetLength(resultLen);
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nsAString::iterator begin;
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result.BeginWriting(begin);
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if (begin.size_forward() != resultLen)
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return NS_ERROR_OUT_OF_MEMORY;
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rv = RegQueryValueExW(mKey, flatName.get(), 0, NULL, (LPBYTE) begin.get(),
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&size);
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return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::ReadIntValue(const nsAString &name, PRUint32 *result)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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DWORD size = sizeof(*result);
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LONG rv = RegQueryValueExW(mKey, PromiseFlatString(name).get(), 0, NULL,
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(LPBYTE) result, &size);
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return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::ReadInt64Value(const nsAString &name, PRUint64 *result)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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DWORD size = sizeof(*result);
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LONG rv = RegQueryValueExW(mKey, PromiseFlatString(name).get(), 0, NULL,
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(LPBYTE) result, &size);
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return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::ReadBinaryValue(const nsAString &name, nsACString &result)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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DWORD size;
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LONG rv = RegQueryValueExW(mKey, PromiseFlatString(name).get(), 0,
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NULL, NULL, &size);
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if (rv != ERROR_SUCCESS)
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return NS_ERROR_FAILURE;
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result.SetLength(size);
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nsACString::iterator begin;
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result.BeginWriting(begin);
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if (begin.size_forward() != size)
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return NS_ERROR_OUT_OF_MEMORY;
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rv = RegQueryValueExW(mKey, PromiseFlatString(name).get(), 0, NULL,
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(LPBYTE) begin.get(), &size);
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return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::WriteStringValue(const nsAString &name, const nsAString &value)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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// Need to indicate complete size of buffer including null terminator.
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const nsString &flatValue = PromiseFlatString(value);
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LONG rv = RegSetValueExW(mKey, PromiseFlatString(name).get(), 0, REG_SZ,
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(const BYTE *) flatValue.get(),
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(flatValue.Length() + 1) * sizeof(PRUnichar));
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return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::WriteIntValue(const nsAString &name, PRUint32 value)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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LONG rv = RegSetValueExW(mKey, PromiseFlatString(name).get(), 0, REG_DWORD,
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(const BYTE *) &value, sizeof(value));
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return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::WriteInt64Value(const nsAString &name, PRUint64 value)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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LONG rv = RegSetValueExW(mKey, PromiseFlatString(name).get(), 0, REG_QWORD,
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(const BYTE *) &value, sizeof(value));
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return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::WriteBinaryValue(const nsAString &name, const nsACString &value)
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{
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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const nsCString &flatValue = PromiseFlatCString(value);
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LONG rv = RegSetValueExW(mKey, PromiseFlatString(name).get(), 0, REG_BINARY,
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(const BYTE *) flatValue.get(), flatValue.Length());
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return (rv == ERROR_SUCCESS) ? NS_OK : NS_ERROR_FAILURE;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::StartWatching(PRBool recurse)
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{
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#ifdef WINCE
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return NS_ERROR_NOT_IMPLEMENTED;
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#else
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NS_ENSURE_TRUE(mKey, NS_ERROR_NOT_INITIALIZED);
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if (mWatchEvent)
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return NS_OK;
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mWatchEvent = CreateEvent(NULL, TRUE, FALSE, NULL);
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if (!mWatchEvent)
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return NS_ERROR_OUT_OF_MEMORY;
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DWORD filter = REG_NOTIFY_CHANGE_NAME |
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REG_NOTIFY_CHANGE_ATTRIBUTES |
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REG_NOTIFY_CHANGE_LAST_SET |
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REG_NOTIFY_CHANGE_SECURITY;
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LONG rv = RegNotifyChangeKeyValue(mKey, recurse, filter, mWatchEvent, TRUE);
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if (rv != ERROR_SUCCESS) {
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StopWatching();
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// On older versions of Windows, this call is not implemented, so simply
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// return NS_OK in those cases and pretend that the watching is happening.
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return (rv == ERROR_CALL_NOT_IMPLEMENTED) ? NS_OK : NS_ERROR_FAILURE;
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}
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mWatchRecursive = recurse;
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return NS_OK;
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#endif
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}
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NS_IMETHODIMP
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nsWindowsRegKey::StopWatching()
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{
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if (mWatchEvent) {
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CloseHandle(mWatchEvent);
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mWatchEvent = NULL;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::HasChanged(PRBool *result)
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{
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if (mWatchEvent && WaitForSingleObject(mWatchEvent, 0) == WAIT_OBJECT_0) {
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// An event only gets signaled once, then it's done, so we have to set up
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// another event to watch.
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StopWatching();
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StartWatching(mWatchRecursive);
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*result = PR_TRUE;
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} else {
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*result = PR_FALSE;
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}
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return NS_OK;
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}
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NS_IMETHODIMP
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nsWindowsRegKey::IsWatching(PRBool *result)
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{
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*result = (mWatchEvent != NULL);
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return NS_OK;
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}
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//-----------------------------------------------------------------------------
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nsresult
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NS_NewWindowsRegKey(nsIWindowsRegKey **result)
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{
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*result = new nsWindowsRegKey();
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if (!*result)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(*result);
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return NS_OK;
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}
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//-----------------------------------------------------------------------------
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NS_METHOD
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nsWindowsRegKeyConstructor(nsISupports *delegate, const nsIID &iid,
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void **result)
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{
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if (delegate)
|
|
return NS_ERROR_NO_AGGREGATION;
|
|
|
|
nsCOMPtr<nsIWindowsRegKey> key;
|
|
nsresult rv = NS_NewWindowsRegKey(getter_AddRefs(key));
|
|
if (NS_SUCCEEDED(rv))
|
|
rv = key->QueryInterface(iid, result);
|
|
return rv;
|
|
}
|