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25 lines
770 B
TypeScript
25 lines
770 B
TypeScript
// Copyright 2018-2019 the Deno authors. All rights reserved. MIT license.
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import { Buffer, Reader } from "deno";
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// `off` is the offset into `dst` where it will at which to begin writing values
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// from `src`.
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// Returns the number of bytes copied.
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export function copyBytes(dst: Uint8Array, src: Uint8Array, off = 0): number {
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off = Math.max(0, Math.min(off, dst.byteLength));
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const r = dst.byteLength - off;
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if (src.byteLength > r) {
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src = src.subarray(0, r);
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}
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dst.set(src, off);
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return src.byteLength;
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}
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export function charCode(s: string): number {
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return s.charCodeAt(0);
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}
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const encoder = new TextEncoder();
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export function stringsReader(s: string): Reader {
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const ui8 = encoder.encode(s);
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return new Buffer(ui8.buffer as ArrayBuffer);
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}
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