storage/FileInfo: convert mtime to std::chrono::system_clock::time_point

src/storage/FileInfo.hxx

@@ -22,7 +22,8 @@
 
 #include "check.h"
 
-#include <time.h>
+#include <chrono>
+
 #include <stdint.h>
 
 struct StorageFileInfo {
@@ -40,9 +41,10 @@ struct StorageFileInfo {
 	uint64_t size;
 
 	/**
-	 * The modification time.  0 means unknown / not applicable.
+	 * The modification time.  A negative value means unknown /
+	 * not applicable.
 	 */
-	time_t mtime;
+	std::chrono::system_clock::time_point mtime;
 
 	/**
 	 * Device id and inode number.  0 means unknown / not
@@ -55,7 +57,7 @@ struct StorageFileInfo {
 	explicit constexpr StorageFileInfo(Type _type)
 		:type(_type),
 		 size(0),
-		 mtime(0),
+		 mtime(std::chrono::system_clock::time_point::min()),
 		 device(0), inode(0) {}
 
 	constexpr bool IsRegular() const {

src/storage/plugins/CurlStorage.cxx

@@ -418,9 +418,7 @@ protected:
 			? StorageFileInfo::Type::DIRECTORY
 			: StorageFileInfo::Type::REGULAR;
 		info.size = r.length;
-		info.mtime = !IsNegative(r.mtime)
-			? std::chrono::system_clock::to_time_t(r.mtime)
-			: 0;
+		info.mtime = r.mtime;
 	}
 };
 
@@ -514,9 +512,7 @@ protected:
 				       ? StorageFileInfo::Type::DIRECTORY
 				       : StorageFileInfo::Type::REGULAR);
 		info.size = r.length;
-		info.mtime = !IsNegative(r.mtime)
-			? std::chrono::system_clock::to_time_t(r.mtime)
-			: 0;
+		info.mtime = r.mtime;
 	}
 };
 

src/storage/plugins/LocalStorage.cxx

@@ -86,7 +86,7 @@ Stat(Path path, bool follow)
 		info.type = StorageFileInfo::Type::OTHER;
 
 	info.size = src.GetSize();
-	info.mtime = std::chrono::system_clock::to_time_t(src.GetModificationTime());
+	info.mtime = src.GetModificationTime();
 #ifdef WIN32
 	info.device = info.inode = 0;
 #else

src/storage/plugins/NfsStorage.cxx

@@ -250,7 +250,7 @@ Copy(StorageFileInfo &info, const struct stat &st)
 		info.type = StorageFileInfo::Type::OTHER;
 
 	info.size = st.st_size;
-	info.mtime = st.st_mtime;
+	info.mtime = std::chrono::system_clock::from_time_t(st.st_mtime);
 	info.device = st.st_dev;
 	info.inode = st.st_ino;
 }
@@ -316,7 +316,7 @@ Copy(StorageFileInfo &info, const struct nfsdirent &ent)
 	}
 
 	info.size = ent.size;
-	info.mtime = ent.mtime.tv_sec;
+	info.mtime = std::chrono::system_clock::from_time_t(ent.mtime.tv_sec);
 	info.device = 0;
 	info.inode = ent.inode;
 }

src/storage/plugins/SmbclientStorage.cxx

@@ -111,7 +111,7 @@ GetInfo(const char *path)
 		info.type = StorageFileInfo::Type::OTHER;
 
 	info.size = st.st_size;
-	info.mtime = st.st_mtime;
+	info.mtime = std::chrono::system_clock::from_time_t(st.st_mtime);
 	info.device = st.st_dev;
 	info.inode = st.st_ino;
 	return info;