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comparison: toolkit/components/osfile/modules/osfile_native.jsm
toolkit/components/osfile/modules/osfile_native.jsm
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| 1 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 2 * License, v. 2.0. If a copy of the MPL was not distributed with this file, | |
| 3 * You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 4 | |
| 5 /** | |
| 6 * Native (xpcom) implementation of key OS.File functions | |
| 7 */ | |
| 8 | |
| 9 "use strict"; | |
| 10 | |
| 11 this.EXPORTED_SYMBOLS = ["read"]; | |
| 12 | |
| 13 let {results: Cr, utils: Cu, interfaces: Ci} = Components; | |
| 14 | |
| 15 let SharedAll = Cu.import("resource://gre/modules/osfile/osfile_shared_allthreads.jsm", {}); | |
| 16 | |
| 17 let SysAll = {}; | |
| 18 if (SharedAll.Constants.Win) { | |
| 19 Cu.import("resource://gre/modules/osfile/osfile_win_allthreads.jsm", SysAll); | |
| 20 } else if (SharedAll.Constants.libc) { | |
| 21 Cu.import("resource://gre/modules/osfile/osfile_unix_allthreads.jsm", SysAll); | |
| 22 } else { | |
| 23 throw new Error("I am neither under Windows nor under a Posix system"); | |
| 24 } | |
| 25 let {Promise} = Cu.import("resource://gre/modules/Promise.jsm", {}); | |
| 26 let {XPCOMUtils} = Cu.import("resource://gre/modules/XPCOMUtils.jsm", {}); | |
| 27 | |
| 28 /** | |
| 29 * The native service holding the implementation of the functions. | |
| 30 */ | |
| 31 XPCOMUtils.defineLazyServiceGetter(this, | |
| 32 "Internals", | |
| 33 "@mozilla.org/toolkit/osfile/native-internals;1", | |
| 34 "nsINativeOSFileInternalsService"); | |
| 35 | |
| 36 /** | |
| 37 * Native implementation of OS.File.read | |
| 38 * | |
| 39 * This implementation does not handle option |compression|. | |
| 40 */ | |
| 41 this.read = function(path, options = {}) { | |
| 42 // Sanity check on types of options | |
| 43 if ("encoding" in options && typeof options.encoding != "string") { | |
| 44 return Promise.reject(new TypeError("Invalid type for option encoding")); | |
| 45 } | |
| 46 if ("compression" in options && typeof options.compression != "string") { | |
| 47 return Promise.reject(new TypeError("Invalid type for option compression")); | |
| 48 } | |
| 49 if ("bytes" in options && typeof options.bytes != "number") { | |
| 50 return Promise.reject(new TypeError("Invalid type for option bytes")); | |
| 51 } | |
| 52 | |
| 53 let deferred = Promise.defer(); | |
| 54 Internals.read(path, | |
| 55 options, | |
| 56 function onSuccess(success) { | |
| 57 success.QueryInterface(Ci.nsINativeOSFileResult); | |
| 58 if ("outExecutionDuration" in options) { | |
| 59 options.outExecutionDuration = | |
| 60 success.executionDurationMS + | |
| 61 (options.outExecutionDuration || 0); | |
| 62 } | |
| 63 deferred.resolve(success.result); | |
| 64 }, | |
| 65 function onError(operation, oserror) { | |
| 66 deferred.reject(new SysAll.Error(operation, oserror, path)); | |
| 67 } | |
| 68 ); | |
| 69 return deferred.promise; | |
| 70 }; |
