From f56fd7580ce74395aed7d448c490f33328884913 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?S=C3=B6nke=20Ludwig?= <sludwig@rejectedsoftware.com>
Date: Tue, 22 Oct 2019 11:41:35 +0200
Subject: [PATCH] Avoid reallocating the data in readFileUTF8 if the UTF
 encoding is valid.

Uses the immutable overload of sanitizeUTF8 to reuse the original buffer if possible.
---
 source/vibe/core/file.d | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/source/vibe/core/file.d b/source/vibe/core/file.d
index 410ddf3..db2a1ea 100644
--- a/source/vibe/core/file.d
+++ b/source/vibe/core/file.d
@@ -118,7 +118,9 @@ string readFileUTF8(NativePath path)
 {
 	import vibe.internal.string;
 
-	return stripUTF8Bom(sanitizeUTF8(readFile(path)));
+	auto data = readFile(path);
+	auto idata = () @trusted { return data.assumeUnique; } ();
+	return stripUTF8Bom(sanitizeUTF8(idata));
 }
 /// ditto
 string readFileUTF8(string path)