lib/gcrypt/MD5: move code to Hash.hxx

Makefile.am

@@ -1460,6 +1460,7 @@ if ENABLE_QOBUZ
 libinput_a_SOURCES += \
 	$(YAJL_SOURCES) \
 	src/lib/gcrypt/MD5.cxx src/lib/gcrypt/MD5.hxx \
+	src/lib/gcrypt/Hash.hxx \
 	src/input/plugins/QobuzSession.hxx \
 	src/input/plugins/QobuzClient.cxx src/input/plugins/QobuzClient.hxx \
 	src/input/plugins/QobuzErrorParser.cxx src/input/plugins/QobuzErrorParser.hxx \

src/lib/gcrypt/Hash.hxx

@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2018 Max Kellermann <max.kellermann@gmail.com>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * - Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
+ * FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
+ * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
+ * OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef GCRYPT_HASH_HXX
+#define GCRYPT_HASH_HXX
+
+#include "util/ConstBuffer.hxx"
+#include "Compiler.h"
+
+#include <gcrypt.h>
+
+#include <array>
+
+namespace Gcrypt {
+
+template<int algo, size_t size>
+gcc_pure
+auto
+Hash(ConstBuffer<void> input) noexcept
+{
+	std::array<uint8_t, size> result;
+	gcry_md_hash_buffer(GCRY_MD_MD5, &result.front(),
+			    input.data, input.size);
+	return result;
+}
+
+} /* namespace Gcrypt */
+
+#endif

src/lib/gcrypt/MD5.cxx

@@ -28,19 +28,14 @@
  */
 
 #include "MD5.hxx"
-#include "util/ConstBuffer.hxx"
-
-#include <gcrypt.h>
+#include "Hash.hxx"
 
 #include <stdio.h>
 
 std::array<uint8_t, 16>
 MD5(ConstBuffer<void> input) noexcept
 {
-	std::array<uint8_t, 16> result;
-	gcry_md_hash_buffer(GCRY_MD_MD5, &result.front(),
-			    input.data, input.size);
-	return result;
+	return Gcrypt::Hash<GCRY_MD_MD5, 16>(input);
 }
 
 std::array<char, 33>