refactor: shift copyBytes and tweak deps to reduce dependencies (#6469)

4 files changed, 7 insertions, 59 deletions

diff --git a/std/io/bufio.ts b/std/io/bufio.ts
index e4759dcb7..cd2573683 100644
--- a/std/io/bufio.ts
+++ b/std/io/bufio.ts
@@ -6,14 +6,14 @@
 type Reader = Deno.Reader;
 type Writer = Deno.Writer;
 type WriterSync = Deno.WriterSync;
-import { charCode, copyBytes } from "./util.ts";
+import { copyBytes } from "../bytes/mod.ts";
 import { assert } from "../_util/assert.ts";
 
 const DEFAULT_BUF_SIZE = 4096;
 const MIN_BUF_SIZE = 16;
 const MAX_CONSECUTIVE_EMPTY_READS = 100;
-const CR = charCode("\r");
-const LF = charCode("\n");
+const CR = "\r".charCodeAt(0);
+const LF = "\n".charCodeAt(0);
 
 export class BufferFullError extends Error {
   name = "BufferFullError";
diff --git a/std/io/bufio_test.ts b/std/io/bufio_test.ts
index 2a32ba135..6bfd2cff9 100644
--- a/std/io/bufio_test.ts
+++ b/std/io/bufio_test.ts
@@ -16,7 +16,8 @@ import {
 import * as iotest from "./_iotest.ts";
 import { StringReader } from "./readers.ts";
 import { StringWriter } from "./writers.ts";
-import { charCode, copyBytes } from "./util.ts";
+import { charCode } from "./util.ts";
+import { copyBytes } from "../bytes/mod.ts";
 
 const encoder = new TextEncoder();
 
diff --git a/std/io/util.ts b/std/io/util.ts
index 22ecb1331..f4b7bf8bb 100644
--- a/std/io/util.ts
+++ b/std/io/util.ts
@@ -1,25 +1,6 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
 import * as path from "../path/mod.ts";
 
-/**
- * Copy bytes from one Uint8Array to another.  Bytes from `src` which don't fit
- * into `dst` will not be copied.
- *
- * @param src Source byte array
- * @param dst Destination byte array
- * @param off Offset into `dst` at which to begin writing values from `src`.
- * @return number of bytes copied
- */
-export function copyBytes(src: Uint8Array, dst: Uint8Array, off = 0): number {
-  off = Math.max(0, Math.min(off, dst.byteLength));
-  const dstBytesAvailable = dst.byteLength - off;
-  if (src.byteLength > dstBytesAvailable) {
-    src = src.subarray(0, dstBytesAvailable);
-  }
-  dst.set(src, off);
-  return src.byteLength;
-}
-
 export function charCode(s: string): number {
   return s.charCodeAt(0);
 }
diff --git a/std/io/util_test.ts b/std/io/util_test.ts
index d33a328d6..c602a90d3 100644
--- a/std/io/util_test.ts
+++ b/std/io/util_test.ts
@@ -1,41 +1,7 @@
 // Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
-import { assert, assertEquals } from "../testing/asserts.ts";
+import { assert } from "../testing/asserts.ts";
 import * as path from "../path/mod.ts";
-import { copyBytes, tempFile } from "./util.ts";
-
-Deno.test("[io/tuil] copyBytes", function (): void {
-  const dst = new Uint8Array(4);
-
-  dst.fill(0);
-  let src = Uint8Array.of(1, 2);
-  let len = copyBytes(src, dst, 0);
-  assert(len === 2);
-  assertEquals(dst, Uint8Array.of(1, 2, 0, 0));
-
-  dst.fill(0);
-  src = Uint8Array.of(1, 2);
-  len = copyBytes(src, dst, 1);
-  assert(len === 2);
-  assertEquals(dst, Uint8Array.of(0, 1, 2, 0));
-
-  dst.fill(0);
-  src = Uint8Array.of(1, 2, 3, 4, 5);
-  len = copyBytes(src, dst);
-  assert(len === 4);
-  assertEquals(dst, Uint8Array.of(1, 2, 3, 4));
-
-  dst.fill(0);
-  src = Uint8Array.of(1, 2);
-  len = copyBytes(src, dst, 100);
-  assert(len === 0);
-  assertEquals(dst, Uint8Array.of(0, 0, 0, 0));
-
-  dst.fill(0);
-  src = Uint8Array.of(3, 4);
-  len = copyBytes(src, dst, -2);
-  assert(len === 2);
-  assertEquals(dst, Uint8Array.of(3, 4, 0, 0));
-});
+import { tempFile } from "./util.ts";
 
 Deno.test({
   name: "[io/util] tempfile",