win32: define our own POSIX struct stat, and support USE_NSEC

CMakeLists.txt

@@ -87,7 +87,7 @@ ENDIF()
 
 CHECK_STRUCT_HAS_MEMBER("struct stat" st_mtim.tv_nsec sys/stat.h
 	HAVE_STRUCT_STAT_NSEC LANGUAGE C)
-IF(HAVE_STRUCT_STAT_NSEC)
+IF(HAVE_STRUCT_STAT_NSEC OR WIN32)
 	OPTION( USE_NSEC		"Care about sub-second file mtimes and ctimes"	OFF )
 ENDIF()
 

src/common.h

@@ -41,6 +41,7 @@
 # include <ws2tcpip.h>
 # include "win32/msvc-compat.h"
 # include "win32/mingw-compat.h"
+# include "win32/win32-compat.h"
 # include "win32/error.h"
 # include "win32/version.h"
 # ifdef GIT_THREADS

src/win32/mingw-compat.h

@@ -11,12 +11,6 @@
 
 #undef stat
 
-#if _WIN32_WINNT >= 0x0601
-#define stat __stat64
-#else
-#define stat _stati64
-#endif
-
 #if _WIN32_WINNT < 0x0600 && !defined(__MINGW64_VERSION_MAJOR)
 #undef MemoryBarrier
 void __mingworg_MemoryBarrier(void);

src/win32/msvc-compat.h

@@ -9,9 +9,6 @@
 
 #if defined(_MSC_VER)
 
-/* 64-bit stat information, regardless of USE_32BIT_TIME_T define */
-#define stat __stat64
-
 typedef unsigned short mode_t;
 typedef SSIZE_T ssize_t;
 

src/win32/w32_util.h

@@ -76,17 +76,23 @@ size_t git_win32__path_trim_end(wchar_t *str, size_t len);
 size_t git_win32__canonicalize_path(wchar_t *str, size_t len);
 
 /**
- * Converts a FILETIME structure to a time_t.
+ * Converts a FILETIME structure to a struct timespec.
  *
  * @param FILETIME A pointer to a FILETIME
- * @return A time_t containing the same time
+ * @param ts A pointer to the timespec structure to fill in
  */
-GIT_INLINE(time_t) git_win32__filetime_to_time_t(const FILETIME *ft)
+GIT_INLINE(void) git_win32__filetime_to_timespec(
+	const FILETIME *ft,
+	struct timespec *ts)
 {
 	long long winTime = ((long long)ft->dwHighDateTime << 32) + ft->dwLowDateTime;
 	winTime -= 116444736000000000LL; /* Windows to Unix Epoch conversion */
-	winTime /= 10000000;             /* Nano to seconds resolution */
+	ts->tv_sec = (time_t)(winTime / 10000000);
-	return (time_t)winTime;
+#ifdef GIT_USE_NSEC
+	ts->tv_nsec = (winTime % 10000000) * 100;
+#else
+	ts->tv_nsec = 0;
+#endif
 }
 
 GIT_INLINE(void) git_win32__timeval_to_filetime(
@@ -122,9 +128,9 @@ GIT_INLINE(int) git_win32__file_attribute_to_stat(
 	st->st_size = ((git_off_t)attrdata->nFileSizeHigh << 32) + attrdata->nFileSizeLow;
 	st->st_dev = _getdrive() - 1;
 	st->st_rdev = st->st_dev;
-	st->st_atime = git_win32__filetime_to_time_t(&(attrdata->ftLastAccessTime));
+	git_win32__filetime_to_timespec(&(attrdata->ftLastAccessTime), &(st->st_atim));
-	st->st_mtime = git_win32__filetime_to_time_t(&(attrdata->ftLastWriteTime));
+	git_win32__filetime_to_timespec(&(attrdata->ftLastWriteTime), &(st->st_mtim));
-	st->st_ctime = git_win32__filetime_to_time_t(&(attrdata->ftCreationTime));
+	git_win32__filetime_to_timespec(&(attrdata->ftCreationTime), &(st->st_ctim));
 
 	if (attrdata->dwFileAttributes & FILE_ATTRIBUTE_REPARSE_POINT && path) {
 		git_win32_path target;

src/win32/win32-compat.h

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) the libgit2 contributors. All rights reserved.
+ *
+ * This file is part of libgit2, distributed under the GNU GPL v2 with
+ * a Linking Exception. For full terms see the included COPYING file.
+ */
+#ifndef INCLUDE_win32_compat__
+#define INCLUDE_win32_compat__
+
+#include <stdint.h>
+#include <time.h>
+#include <wchar.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+struct p_timespec {
+	time_t tv_sec;
+	long tv_nsec;
+};
+
+#define timespec p_timespec
+
+struct p_stat {
+	_dev_t st_dev;
+	_ino_t st_ino;
+	mode_t st_mode;
+	short st_nlink;
+	short st_uid;
+	short st_gid;
+	_dev_t st_rdev;
+	uint64_t st_size;
+	struct timespec st_atim;
+	struct timespec st_mtim;
+	struct timespec st_ctim;
+#define st_atime st_atim.tv_sec
+#define st_mtime st_mtim.tv_sec
+#define st_ctime st_ctim.tv_sec
+};
+
+#define stat p_stat
+
+#endif /* INCLUDE_win32_compat__ */