system/Clock, fs/FileInfo: move FILETIME specific code to time/FileTime.hxx

src/fs/FileInfo.hxx

@@ -24,7 +24,7 @@
 #include "system/Error.hxx"
 
 #ifdef _WIN32
-#include <fileapi.h>
+#include "time/FileTime.hxx"
 #else
 #include <sys/stat.h>
 #endif
@@ -33,30 +33,6 @@
 
 #include <stdint.h>
 
-#ifdef _WIN32
-
-static constexpr uint64_t
-ConstructUint64(DWORD lo, DWORD hi)
-{
-	return uint64_t(lo) | (uint64_t(hi) << 32);
-}
-
-static constexpr time_t
-FileTimeToTimeT(FILETIME ft)
-{
-	return (ConstructUint64(ft.dwLowDateTime, ft.dwHighDateTime)
-		- 116444736000000000) / 10000000;
-}
-
-static std::chrono::system_clock::time_point
-FileTimeToChrono(FILETIME ft)
-{
-	// TODO: eliminate the time_t roundtrip, preserve sub-second resolution
-	return std::chrono::system_clock::from_time_t(FileTimeToTimeT(ft));
-}
-
-#endif
-
 class FileInfo {
 	friend bool GetFileInfo(Path path, FileInfo &info,
 				bool follow_symlinks);

src/system/Clock.cxx

@@ -1,5 +1,5 @@
 /*
- * Copyright 2003-2018 The Music Player Daemon Project
+ * Copyright 2003-2019 The Music Player Daemon Project
  * http://www.musicpd.org
  *
  * This program is free software; you can redistribute it and/or modify
@@ -20,19 +20,9 @@
 #include "Clock.hxx"
 
 #ifdef _WIN32
-#include <windows.h>
+#include "time/FileTime.hxx"
 
-gcc_const
+#include <windows.h>
-static std::chrono::seconds
-DeltaFileTimeS(FILETIME a, FILETIME b)
-{
-	ULARGE_INTEGER a2, b2;
-	b2.LowPart = b.dwLowDateTime;
-	b2.HighPart = b.dwHighDateTime;
-	a2.LowPart = a.dwLowDateTime;
-	a2.HighPart = a.dwHighDateTime;
-	return std::chrono::seconds((a2.QuadPart - b2.QuadPart) / 10000000);
-}
 
 std::chrono::seconds
 GetProcessUptimeS()

src/time/FileTime.hxx

@@ -0,0 +1,71 @@
+/*
+ * Copyright 2013-2019 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 FILE_TIME_HXX
+#define FILE_TIME_HXX
+
+#include <fileapi.h>
+
+#include <chrono>
+
+#include <stdint.h>
+
+static constexpr uint64_t
+ConstructUint64(DWORD lo, DWORD hi)
+{
+	return uint64_t(lo) | (uint64_t(hi) << 32);
+}
+
+static constexpr time_t
+FileTimeToTimeT(FILETIME ft)
+{
+	return (ConstructUint64(ft.dwLowDateTime, ft.dwHighDateTime)
+		- 116444736000000000) / 10000000;
+}
+
+static inline std::chrono::system_clock::time_point
+FileTimeToChrono(FILETIME ft)
+{
+	// TODO: eliminate the time_t roundtrip, preserve sub-second resolution
+	return std::chrono::system_clock::from_time_t(FileTimeToTimeT(ft));
+}
+
+gcc_const
+static inline std::chrono::seconds
+DeltaFileTimeS(FILETIME a, FILETIME b)
+{
+	ULARGE_INTEGER a2, b2;
+	b2.LowPart = b.dwLowDateTime;
+	b2.HighPart = b.dwHighDateTime;
+	a2.LowPart = a.dwLowDateTime;
+	a2.HighPart = a.dwHighDateTime;
+	return std::chrono::seconds((a2.QuadPart - b2.QuadPart) / 10000000);
+}
+
+#endif