From 6f1a4a73b754810408cfbb449d0c71e63b762e82 Mon Sep 17 00:00:00 2001
From: Max Kellermann <max@musicpd.org>
Date: Tue, 27 Oct 2020 18:58:25 +0100
Subject: [PATCH] fs/Traits: add GetFilenameSuffix()

---
 src/fs/Traits.hxx | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/src/fs/Traits.hxx b/src/fs/Traits.hxx
index da899df63..b61de1833 100644
--- a/src/fs/Traits.hxx
+++ b/src/fs/Traits.hxx
@@ -88,6 +88,14 @@ struct PathTraitsFS {
 #endif
 	}
 
+	gcc_pure
+	static const_pointer GetFilenameSuffix(const_pointer filename) noexcept {
+		const_pointer dot = StringFindLast(filename, '.');
+		return dot != nullptr && dot > filename && dot[1] != 0
+			? dot + 1
+			: nullptr;
+	}
+
 #ifdef _WIN32
 	gcc_pure gcc_nonnull_all
 	static constexpr bool IsDrive(const_pointer p) noexcept {
@@ -199,6 +207,14 @@ struct PathTraitsUTF8 {
 		return std::strrchr(p, SEPARATOR);
 	}
 
+	gcc_pure
+	static const_pointer GetFilenameSuffix(const_pointer filename) noexcept {
+		const_pointer dot = StringFindLast(filename, '.');
+		return dot != nullptr && dot > filename && dot[1] != 0
+			? dot + 1
+			: nullptr;
+	}
+
 #ifdef _WIN32
 	gcc_pure gcc_nonnull_all
 	static constexpr bool IsDrive(const_pointer p) noexcept {