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denoland-deno/js/truncate.ts

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// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
import * as msg from "gen/cli/msg_generated";
import * as flatbuffers from "./flatbuffers";
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import * as dispatch from "./dispatch";
function req(
name: string,
len?: number
): [flatbuffers.Builder, msg.Any, flatbuffers.Offset] {
const builder = flatbuffers.createBuilder();
const name_ = builder.createString(name);
len = len && len > 0 ? Math.floor(len) : 0;
const inner = msg.Truncate.createTruncate(builder, name_, len);
return [builder, msg.Any.Truncate, inner];
}
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/** Truncates or extends the specified file synchronously, updating the size of
* this file to become size.
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*
* Deno.truncateSync("hello.txt", 10);
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*/
export function truncateSync(name: string, len?: number): void {
dispatch.sendSync(...req(name, len));
}
/**
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* Truncates or extends the specified file, updating the size of this file to
* become size.
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*
* await Deno.truncate("hello.txt", 10);
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*/
export async function truncate(name: string, len?: number): Promise<void> {
await dispatch.sendAsync(...req(name, len));
}