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// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
import { sendSync, sendAsync } from "../dispatch_json.ts";
import { SeekMode } from "../../io.ts";
/** Synchronously seek a file ID to the given offset under mode given by `whence`.
*
* Returns the number of cursor position.
*
* const file = Deno.openSync("/foo/bar.txt");
* const position = Deno.seekSync(file.rid, 0, 0);
*/
export function seekSync(
rid: number,
offset: number,
whence: SeekMode
): number {
return sendSync("op_seek", { rid, offset, whence });
}
/** Seek a file ID to the given offset under mode given by `whence`.
*
* Resolves with the number of cursor position.
*
* const file = await Deno.open("/foo/bar.txt");
* const position = await Deno.seek(file.rid, 0, 0);
*/
export async function seek(
rid: number,
offset: number,
whence: SeekMode
): Promise<number> {
return await sendAsync("op_seek", { rid, offset, whence });
}
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