1 files changed, 52 insertions, 0 deletions
diff --git a/js/utime.ts b/js/utime.ts
new file mode 100644
index 000000000..02c423d24
--- /dev/null
+++ b/js/utime.ts
@@ -0,0 +1,52 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+import * as msg from "gen/cli/msg_generated";
+import * as flatbuffers from "./flatbuffers";
+import * as dispatch from "./dispatch";
+import * as util from "./util";
+
+function req(
+  filename: string,
+  atime: number | Date,
+  mtime: number | Date
+): [flatbuffers.Builder, msg.Any, flatbuffers.Offset] {
+  const atimeSec = atime instanceof Date ? Math.floor(+atime / 1000) : atime;
+  const mtimeSec = mtime instanceof Date ? Math.floor(+mtime / 1000) : mtime;
+
+  const builder = flatbuffers.createBuilder();
+  const filename_ = builder.createString(filename);
+  const atimeParts = util.splitNumberToParts(atimeSec);
+  const atimeMS_ = builder.createLong(atimeParts[0], atimeParts[1]);
+  const mtimeParts = util.splitNumberToParts(mtimeSec);
+  const mtimeMS_ = builder.createLong(mtimeParts[0], mtimeParts[1]);
+
+  const inner = msg.Utime.createUtime(builder, filename_, atimeMS_, mtimeMS_);
+  return [builder, msg.Any.Utime, inner];
+}
+
+/** Synchronously changes the access and modification times of a file system
+ * object referenced by `filename`. Given times are either in seconds
+ * (Unix epoch time) or as `Date` objects.
+ *
+ *       Deno.utimeSync("myfile.txt", 1556495550, new Date());
+ */
+export function utimeSync(
+  filename: string,
+  atime: number | Date,
+  mtime: number | Date
+): void {
+  dispatch.sendSync(...req(filename, atime, mtime));
+}
+
+/** Changes the access and modification times of a file system object
+ * referenced by `filename`. Given times are either in seconds
+ * (Unix epoch time) or as `Date` objects.
+ *
+ *       await Deno.utime("myfile.txt", 1556495550, new Date());
+ */
+export async function utime(
+  filename: string,
+  atime: number | Date,
+  mtime: number | Date
+): Promise<void> {
+  await dispatch.sendAsync(...req(filename, atime, mtime));
+}