[PATCH 1/3] mingw: factor out code to set stat() data

From

Johannes Schindelin via GitGitGadget <gitgitgadget@gmail.com>

Date

Oct 23, 2018, 10:23 UTC

Message-ID

<85485598a8c391262612929ad4b98e79517e01a4.1540290197.git.gitgitgadget@gmail.com>

In-Reply-To

<pull.53.git.gitgitgadget@gmail.com>

From: Johannes Schindelin <johannes.schindelin@gmx.de>

Note: it would be tempting to try to unify this code with the part of
do_lstat() that does the same thing, but they operate on different data
structures: BY_HANDLE_FILE_INFORMATION vs WIN32_FILE_ATTRIBUTE_DATA. So
unfortunately, they cannot be unified.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---
 compat/mingw.c | 39 +++++++++++++++++++++++++--------------
 1 file changed, 25 insertions(+), 14 deletions(-)

diff --git a/compat/mingw.c b/compat/mingw.c
index 18caf2196..d2e7d86db 100644
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -736,6 +736,29 @@ static int do_stat_internal(int follow, const char *file_name, struct stat *buf)
 	return do_lstat(follow, alt_name, buf);
 }
 
+static int get_file_info_by_handle(HANDLE hnd, struct stat *buf)
+{
+	BY_HANDLE_FILE_INFORMATION fdata;
+
+	if (!GetFileInformationByHandle(hnd, &fdata)) {
+		errno = err_win_to_posix(GetLastError());
+		return -1;
+	}
+
+	buf->st_ino = 0;
+	buf->st_gid = 0;
+	buf->st_uid = 0;
+	buf->st_nlink = 1;
+	buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
+	buf->st_size = fdata.nFileSizeLow |
+		(((off_t)fdata.nFileSizeHigh)<<32);
+	buf->st_dev = buf->st_rdev = 0; /* not used by Git */
+	buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
+	buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
+	buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
+	return 0;
+}
+
 int mingw_lstat(const char *file_name, struct stat *buf)
 {
 	return do_stat_internal(0, file_name, buf);
@@ -748,7 +771,6 @@ int mingw_stat(const char *file_name, struct stat *buf)
 int mingw_fstat(int fd, struct stat *buf)
 {
 	HANDLE fh = (HANDLE)_get_osfhandle(fd);
-	BY_HANDLE_FILE_INFORMATION fdata;
 
 	if (fh == INVALID_HANDLE_VALUE) {
 		errno = EBADF;
@@ -758,20 +780,9 @@ int mingw_fstat(int fd, struct stat *buf)
 	if (GetFileType(fh) != FILE_TYPE_DISK)
 		return _fstati64(fd, buf);
 
-	if (GetFileInformationByHandle(fh, &fdata)) {
-		buf->st_ino = 0;
-		buf->st_gid = 0;
-		buf->st_uid = 0;
-		buf->st_nlink = 1;
-		buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
-		buf->st_size = fdata.nFileSizeLow |
-			(((off_t)fdata.nFileSizeHigh)<<32);
-		buf->st_dev = buf->st_rdev = 0; /* not used by Git */
-		buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));
-		buf->st_mtime = filetime_to_time_t(&(fdata.ftLastWriteTime));
-		buf->st_ctime = filetime_to_time_t(&(fdata.ftCreationTime));
+	if (!get_file_info_by_handle(fh, buf))
 		return 0;
-	}
+
 	errno = EBADF;
 	return -1;
 }

-- 
gitgitgadget