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Diffstat (limited to 'tools/addon-sdk-1.3/packages/api-utils/lib/byte-streams.js')
-rw-r--r-- | tools/addon-sdk-1.3/packages/api-utils/lib/byte-streams.js | 135 |
1 files changed, 0 insertions, 135 deletions
diff --git a/tools/addon-sdk-1.3/packages/api-utils/lib/byte-streams.js b/tools/addon-sdk-1.3/packages/api-utils/lib/byte-streams.js deleted file mode 100644 index b44357e..0000000 --- a/tools/addon-sdk-1.3/packages/api-utils/lib/byte-streams.js +++ /dev/null @@ -1,135 +0,0 @@ -/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- - * vim:set ts=2 sw=2 sts=2 et filetype=javascript - * ***** 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 Jetpack. - * - * The Initial Developer of the Original Code is - * the Mozilla Foundation. - * Portions created by the Initial Developer are Copyright (C) 2010 - * the Initial Developer. All Rights Reserved. - * - * Contributor(s): - * Drew Willcoxon <adw@mozilla.com> (Original Author) - * - * 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 - * 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 ***** */ - -"use strict"; - -exports.ByteReader = ByteReader; -exports.ByteWriter = ByteWriter; - -const {Cc, Ci} = require("chrome"); - -// This just controls the maximum number of bytes we read in at one time. -const BUFFER_BYTE_LEN = 0x8000; - -function ByteReader(inputStream) { - const self = this; - - let stream = Cc["@mozilla.org/binaryinputstream;1"]. - createInstance(Ci.nsIBinaryInputStream); - stream.setInputStream(inputStream); - - let manager = new StreamManager(this, stream); - - this.read = function ByteReader_read(numBytes) { - manager.ensureOpened(); - if (typeof(numBytes) !== "number") - numBytes = Infinity; - - let data = ""; - let read = 0; - try { - while (true) { - let avail = stream.available(); - let toRead = Math.min(numBytes - read, avail, BUFFER_BYTE_LEN); - if (toRead <= 0) - break; - data += stream.readBytes(toRead); - read += toRead; - } - } - catch (err) { - throw new Error("Error reading from stream: " + err); - } - - return data; - }; -} - -function ByteWriter(outputStream) { - const self = this; - - let stream = Cc["@mozilla.org/binaryoutputstream;1"]. - createInstance(Ci.nsIBinaryOutputStream); - stream.setOutputStream(outputStream); - - let manager = new StreamManager(this, stream); - - this.write = function ByteWriter_write(str) { - manager.ensureOpened(); - try { - stream.writeBytes(str, str.length); - } - catch (err) { - throw new Error("Error writing to stream: " + err); - } - }; -} - - -// This manages the lifetime of stream, a ByteReader or ByteWriter. It defines -// closed and close() on stream and registers an unload listener that closes -// rawStream if it's still opened. It also provides ensureOpened(), which -// throws an exception if the stream is closed. -function StreamManager(stream, rawStream) { - const self = this; - this.rawStream = rawStream; - this.opened = true; - - stream.__defineGetter__("closed", function stream_closed() { - return !self.opened; - }); - - stream.close = function stream_close() { - self.ensureOpened(); - self.unload(); - }; - - require("./unload").ensure(this); -} - -StreamManager.prototype = { - ensureOpened: function StreamManager_ensureOpened() { - if (!this.opened) - throw new Error("The stream is closed and cannot be used."); - }, - unload: function StreamManager_unload() { - this.rawStream.close(); - this.opened = false; - } -}; |