From bcb88d48a6291d568ff635888c272a99aa826000 Mon Sep 17 00:00:00 2001
From: streamich <streamich@gmail.com>
Date: Tue, 7 Oct 2025 22:42:46 +0200
Subject: [PATCH] =?UTF-8?q?feat:=20=F0=9F=8E=B8=20add=20`.subarray()`=20me?=
 =?UTF-8?q?thod?=
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---
 src/Reader.ts          | 7 +++++++
 src/StreamingReader.ts | 7 +++++++
 src/types.ts           | 2 ++
 3 files changed, 16 insertions(+)

diff --git a/src/Reader.ts b/src/Reader.ts
index 697a524..e7cbbe1 100644
--- a/src/Reader.ts
+++ b/src/Reader.ts
@@ -45,6 +45,13 @@ export class Reader implements IReader, IReaderResettable {
     return bin;
   }
 
+  public subarray(start: number = 0, end?: number): Uint8Array {
+    const x = this.x;
+    const actualStart = x + start;
+    const actualEnd = typeof end === 'number' ? x + end : this.end;
+    return this.uint8.subarray(actualStart, actualEnd);
+  }
+
   /**
    * Creates a new {@link Reader} that references the same underlying memory
    * buffer. But with independent cursor and end.
diff --git a/src/StreamingReader.ts b/src/StreamingReader.ts
index 28292e3..a64a39e 100644
--- a/src/StreamingReader.ts
+++ b/src/StreamingReader.ts
@@ -95,6 +95,13 @@ export class StreamingReader implements IReader, IReaderResettable {
     return bin;
   }
 
+  public subarray(start: number = 0, end?: number): Uint8Array {
+    const x = this.x;
+    const actualStart = x + start;
+    const actualEnd = typeof end === 'number' ? x + end : this.size() + x - start;
+    return this.uint8.subarray(actualStart, actualEnd);
+  }
+
   /**
    * Creates a new {@link Reader} that references the same underlying memory
    * buffer. But with independent cursor and end.
diff --git a/src/types.ts b/src/types.ts
index d891134..3ae3713 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -91,6 +91,8 @@ export interface IReaderBase {
    */
   cut(size?: number): IReaderBase;
 
+  subarray(start?: number, end?: number): Uint8Array;
+
   /** Get current byte value without advancing the cursor. */
   peek(): number;