From cc3e71d8c7e2eb177dfcec95f75640c694fd83c0 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@musicpd.org>
Date: Mon, 6 Apr 2020 12:59:33 +0200
Subject: [PATCH] util/CharUtil: add IsHexDigit()

---
 src/util/CharUtil.hxx | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/util/CharUtil.hxx b/src/util/CharUtil.hxx
index 2dc7e34eb..44c3ad1f8 100644
--- a/src/util/CharUtil.hxx
+++ b/src/util/CharUtil.hxx
@@ -130,4 +130,12 @@ ToLowerASCII(char ch) noexcept
 		: ch;
 }
 
+constexpr bool
+IsHexDigit(char ch) noexcept
+{
+	return IsDigitASCII(ch) ||
+		(ch >= 'a' && ch <= 'f') ||
+		(ch >= 'A' && ch <= 'F');
+}
+
 #endif