From bf064874dbbc7c132021e2fe6444b5da9d4e013f Mon Sep 17 00:00:00 2001
From: Norman Feske <norman.feske@genode-labs.com>
Date: Wed, 25 Sep 2024 16:27:15 +0200
Subject: [PATCH] util/string.h: Byte_range_ptr::with_skipped_bytes

The new method provides a safe way to narrow the byte range to a
given offset.

Issue #5351
---
 repos/base/include/util/string.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/repos/base/include/util/string.h b/repos/base/include/util/string.h
index 0088a83e8f..af2a438d2b 100644
--- a/repos/base/include/util/string.h
+++ b/repos/base/include/util/string.h
@@ -84,6 +84,15 @@ struct Genode::Byte_range_ptr : Noncopyable
 
 	Byte_range_ptr(char *start, size_t num_bytes)
 	: start(start), num_bytes(num_bytes) { }
+
+	void with_skipped_bytes(size_t const n, auto const &fn)
+	{
+		if (num_bytes <= n)
+			return;
+
+		Byte_range_ptr const remainder { start + n, num_bytes - n };
+		fn(remainder);
+	}
 };