[bytes] fix bytesFindIndex and bytesFindLastIndex (denoland/deno_std#381)

Original: https://github.com/denoland/deno_std/commit/87142529163ea047066a2991f51cb2cf3001df74

1 files changed, 8 insertions, 6 deletions

diff --git a/bytes/bytes.ts b/bytes/bytes.ts
index 080ec4445..a79a9ed56 100644
--- a/bytes/bytes.ts
+++ b/bytes/bytes.ts
@@ -6,10 +6,11 @@ export function bytesFindIndex(a: Uint8Array, pat: Uint8Array): number {
   for (let i = 0; i < a.length; i++) {
     if (a[i] !== s) continue;
     const pin = i;
-    let matched = 1;
+    let matched = 1,
+      j = i;
     while (matched < pat.length) {
-      i++;
-      if (a[i] !== pat[i - pin]) {
+      j++;
+      if (a[j] !== pat[j - pin]) {
         break;
       }
       matched++;
@@ -27,10 +28,11 @@ export function bytesFindLastIndex(a: Uint8Array, pat: Uint8Array): number {
   for (let i = a.length - 1; i >= 0; i--) {
     if (a[i] !== e) continue;
     const pin = i;
-    let matched = 1;
+    let matched = 1,
+      j = i;
     while (matched < pat.length) {
-      i--;
-      if (a[i] !== pat[pat.length - 1 - (pin - i)]) {
+      j--;
+      if (a[j] !== pat[pat.length - 1 - (pin - j)]) {
         break;
       }
       matched++;