From 230cb3b0cb9664839c56f80d6dff3706fffc2243 Mon Sep 17 00:00:00 2001
From: Andreas Kling <kling@serenityos.org>
Date: Sat, 28 Jan 2023 21:08:14 +0100
Subject: [PATCH] AK: Add DeprecatedString::from_utf8()

This will be used in Jakt to help transition off of DeprecatedString.
---
 AK/DeprecatedString.cpp | 7 +++++++
 AK/DeprecatedString.h   | 2 ++
 2 files changed, 9 insertions(+)

diff --git a/AK/DeprecatedString.cpp b/AK/DeprecatedString.cpp
index 0b1064f9900..9c45cced074 100644
--- a/AK/DeprecatedString.cpp
+++ b/AK/DeprecatedString.cpp
@@ -455,4 +455,11 @@ DeprecatedStringCodePointIterator DeprecatedString::code_points() const
     return DeprecatedStringCodePointIterator(*this);
 }
 
+ErrorOr<DeprecatedString> DeprecatedString::from_utf8(ReadonlyBytes bytes)
+{
+    if (!Utf8View(bytes).validate())
+        return Error::from_string_literal("DeprecatedString::from_utf8: Input was not valid UTF-8");
+    return DeprecatedString { StringImpl::create(bytes) };
+}
+
 }
diff --git a/AK/DeprecatedString.h b/AK/DeprecatedString.h
index 0155fcdf19a..35474f9bffc 100644
--- a/AK/DeprecatedString.h
+++ b/AK/DeprecatedString.h
@@ -95,6 +95,8 @@ public:
 
     DeprecatedString(DeprecatedFlyString const&);
 
+    static ErrorOr<DeprecatedString> from_utf8(ReadonlyBytes);
+
     [[nodiscard]] static DeprecatedString repeated(char, size_t count);
     [[nodiscard]] static DeprecatedString repeated(StringView, size_t count);