From b7eb241c3569ead990d28b4f4889c2c52fc7894c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bartek=20Iwa=C5=84czuk?= <biwanczuk@gmail.com>
Date: Tue, 10 Mar 2020 00:22:15 +0100
Subject: reorg: move JS ops implementations to cli/js/ops/, part 3 (#4302)

Following JS ops were moved to separate files in cli/js/ops directory:
- net
- tls
- fs
---
 cli/js/ops/fs/truncate.ts | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 cli/js/ops/fs/truncate.ts

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

diff --git a/cli/js/ops/fs/truncate.ts b/cli/js/ops/fs/truncate.ts
new file mode 100644
index 000000000..578e37aa3
--- /dev/null
+++ b/cli/js/ops/fs/truncate.ts
@@ -0,0 +1,33 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+import { sendSync, sendAsync } from "../dispatch_json.ts";
+
+function coerceLen(len?: number): number {
+  if (!len) {
+    return 0;
+  }
+
+  if (len < 0) {
+    return 0;
+  }
+
+  return len;
+}
+
+/** Synchronously truncates or extends the specified file, to reach the
+ * specified `len`.
+ *
+ *       Deno.truncateSync("hello.txt", 10);
+ *
+ * Requires `allow-write` permission. */
+export function truncateSync(path: string, len?: number): void {
+  sendSync("op_truncate", { path, len: coerceLen(len) });
+}
+
+/** Truncates or extends the specified file, to reach the specified `len`.
+ *
+ *       await Deno.truncate("hello.txt", 10);
+ *
+ * Requires `allow-write` permission. */
+export async function truncate(path: string, len?: number): Promise<void> {
+  await sendAsync("op_truncate", { path, len: coerceLen(len) });
+}
-- 
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