From b81e5db17aa8b3088d6034ddf86b79c69410f012 Mon Sep 17 00:00:00 2001
From: Ryan Dahl <ry@tinyclouds.org>
Date: Fri, 4 Oct 2019 20:28:51 -0400
Subject: Merge deno_cli_snapshots into deno_cli (#3064)

---
 cli/js/truncate.ts | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 cli/js/truncate.ts

(limited to 'cli/js/truncate.ts')

diff --git a/cli/js/truncate.ts b/cli/js/truncate.ts
new file mode 100644
index 000000000..5ce7b5158
--- /dev/null
+++ b/cli/js/truncate.ts
@@ -0,0 +1,34 @@
+// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
+import { sendSync, sendAsync } from "./dispatch_json.ts";
+import * as dispatch from "./dispatch.ts";
+
+function coerceLen(len?: number): number {
+  if (!len) {
+    return 0;
+  }
+
+  if (len < 0) {
+    return 0;
+  }
+
+  return len;
+}
+
+/** Truncates or extends the specified file synchronously, updating the size of
+ * this file to become size.
+ *
+ *       Deno.truncateSync("hello.txt", 10);
+ */
+export function truncateSync(name: string, len?: number): void {
+  sendSync(dispatch.OP_TRUNCATE, { name, len: coerceLen(len) });
+}
+
+/**
+ * Truncates or extends the specified file, updating the size of this file to
+ * become size.
+ *
+ *       await Deno.truncate("hello.txt", 10);
+ */
+export async function truncate(name: string, len?: number): Promise<void> {
+  await sendAsync(dispatch.OP_TRUNCATE, { name, len: coerceLen(len) });
+}
-- 
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