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-rw-r--r--toolkit/modules/subprocess/subprocess_shared.js98
1 files changed, 98 insertions, 0 deletions
diff --git a/toolkit/modules/subprocess/subprocess_shared.js b/toolkit/modules/subprocess/subprocess_shared.js
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+++ b/toolkit/modules/subprocess/subprocess_shared.js
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+/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
+/* vim: set sts=2 sw=2 et tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+/* exported Library, SubprocessConstants */
+
+if (!ArrayBuffer.transfer) {
+ /**
+ * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/ArrayBuffer/transfer
+ *
+ * @param {ArrayBuffer} buffer
+ * @param {integer} [size = buffer.byteLength]
+ * @returns {ArrayBuffer}
+ */
+ ArrayBuffer.transfer = function(buffer, size = buffer.byteLength) {
+ let u8out = new Uint8Array(size);
+ let u8buffer = new Uint8Array(buffer, 0, Math.min(size, buffer.byteLength));
+
+ u8out.set(u8buffer);
+
+ return u8out.buffer;
+ };
+}
+
+var libraries = {};
+
+class Library {
+ constructor(name, names, definitions) {
+ if (name in libraries) {
+ return libraries[name];
+ }
+
+ for (let name of names) {
+ try {
+ if (!this.library) {
+ this.library = ctypes.open(name);
+ }
+ } catch (e) {
+ // Ignore errors until we've tried all the options.
+ }
+ }
+ if (!this.library) {
+ throw new Error("Could not load libc");
+ }
+
+ libraries[name] = this;
+
+ for (let symbol of Object.keys(definitions)) {
+ this.declare(symbol, ...definitions[symbol]);
+ }
+ }
+
+ declare(name, ...args) {
+ Object.defineProperty(this, name, {
+ configurable: true,
+ get() {
+ Object.defineProperty(this, name, {
+ configurable: true,
+ value: this.library.declare(name, ...args),
+ });
+
+ return this[name];
+ },
+ });
+ }
+}
+
+/**
+ * Holds constants which apply to various Subprocess operations.
+ * @namespace
+ * @lends Subprocess
+ */
+const SubprocessConstants = {
+ /**
+ * @property {integer} ERROR_END_OF_FILE
+ * The operation failed because the end of the file was reached.
+ * @constant
+ */
+ ERROR_END_OF_FILE: 0xff7a0001,
+ /**
+ * @property {integer} ERROR_INVALID_JSON
+ * The operation failed because an invalid JSON was encountered.
+ * @constant
+ */
+ ERROR_INVALID_JSON: 0xff7a0002,
+ /**
+ * @property {integer} ERROR_BAD_EXECUTABLE
+ * The operation failed because the given file did not exist, or
+ * could not be executed.
+ * @constant
+ */
+ ERROR_BAD_EXECUTABLE: 0xff7a0003,
+};
+
+Object.freeze(SubprocessConstants);