toolkit/modules/WindowsRegistry.jsm@6474c204b198 (annotated)
toolkit/modules/WindowsRegistry.jsm
Wed, 31 Dec 2014 06:09:35 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Wed, 31 Dec 2014 06:09:35 +0100
- changeset 0
- 6474c204b198
- permissions
- -rw-r--r--
Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.
| michael@0 | 1 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 2 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 3 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 4 | |
| michael@0 | 5 | "use strict"; |
| michael@0 | 6 | const {classes: Cc, interfaces: Ci, utils: Cu, results: Cr} = Components; |
| michael@0 | 7 | |
| michael@0 | 8 | this.EXPORTED_SYMBOLS = ["WindowsRegistry"]; |
| michael@0 | 9 | |
| michael@0 | 10 | const WindowsRegistry = { |
| michael@0 | 11 | /** |
| michael@0 | 12 | * Safely reads a value from the registry. |
| michael@0 | 13 | * |
| michael@0 | 14 | * @param aRoot |
| michael@0 | 15 | * The root registry to use. |
| michael@0 | 16 | * @param aPath |
| michael@0 | 17 | * The registry path to the key. |
| michael@0 | 18 | * @param aKey |
| michael@0 | 19 | * The key name. |
| michael@0 | 20 | * @return The key value or undefined if it doesn't exist. If the key is |
| michael@0 | 21 | * a REG_MULTI_SZ, an array is returned. |
| michael@0 | 22 | */ |
| michael@0 | 23 | readRegKey: function(aRoot, aPath, aKey) { |
| michael@0 | 24 | const kRegMultiSz = 7; |
| michael@0 | 25 | let registry = Cc["@mozilla.org/windows-registry-key;1"]. |
| michael@0 | 26 | createInstance(Ci.nsIWindowsRegKey); |
| michael@0 | 27 | try { |
| michael@0 | 28 | registry.open(aRoot, aPath, Ci.nsIWindowsRegKey.ACCESS_READ); |
| michael@0 | 29 | if (registry.hasValue(aKey)) { |
| michael@0 | 30 | let type = registry.getValueType(aKey); |
| michael@0 | 31 | switch (type) { |
| michael@0 | 32 | case kRegMultiSz: |
| michael@0 | 33 | // nsIWindowsRegKey doesn't support REG_MULTI_SZ type out of the box. |
| michael@0 | 34 | let str = registry.readStringValue(aKey); |
| michael@0 | 35 | return [v for each (v in str.split("\0")) if (v)]; |
| michael@0 | 36 | case Ci.nsIWindowsRegKey.TYPE_STRING: |
| michael@0 | 37 | return registry.readStringValue(aKey); |
| michael@0 | 38 | case Ci.nsIWindowsRegKey.TYPE_INT: |
| michael@0 | 39 | return registry.readIntValue(aKey); |
| michael@0 | 40 | default: |
| michael@0 | 41 | throw new Error("Unsupported registry value."); |
| michael@0 | 42 | } |
| michael@0 | 43 | } |
| michael@0 | 44 | } catch (ex) { |
| michael@0 | 45 | } finally { |
| michael@0 | 46 | registry.close(); |
| michael@0 | 47 | } |
| michael@0 | 48 | return undefined; |
| michael@0 | 49 | }, |
| michael@0 | 50 | }; |
