mingw: move common functionality to win32.h

Some small Win32 specific functions will be shared by MinGW and
Cygwin compatibility layer. Place them into a separate header.

Signed-off-by: Dmitry Potapov <dpotapov@gmail.com>
Signed-off-by: Shawn O. Pearce <spearce@spearce.org>

diff --git a/compat/mingw.c b/compat/mingw.c
index fc45d240f579ab3e1e0f867859f24132c593410e..09858f6c593d9a8301c857c81e09bfa24b955eac 100644 (file)
--- a/compat/mingw.c
+++ b/compat/mingw.c
@@ -1,4 +1,5 @@
 #include "../git-compat-util.h"
+#include "win32.h"
 #include "../strbuf.h"
 
 unsigned int _CRT_fmode = _O_BINARY;
@@ -39,46 +40,19 @@ static int do_lstat(const char *file_name, struct stat *buf)
 {
        WIN32_FILE_ATTRIBUTE_DATA fdata;
 
-       if (GetFileAttributesExA(file_name, GetFileExInfoStandard, &fdata)) {
-               int fMode = S_IREAD;
-               if (fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
-                       fMode |= S_IFDIR;
-               else
-                       fMode |= S_IFREG;
-               if (!(fdata.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
-                       fMode |= S_IWRITE;
-
+       if (!(errno = get_file_attr(file_name, &fdata))) {
                buf->st_ino = 0;
                buf->st_gid = 0;
                buf->st_uid = 0;
                buf->st_nlink = 1;
-               buf->st_mode = fMode;
+               buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
                buf->st_size = fdata.nFileSizeLow; /* Can't use nFileSizeHigh, since it's not a stat64 */
                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));
-               errno = 0;
                return 0;
        }
-
-       switch (GetLastError()) {
-       case ERROR_ACCESS_DENIED:
-       case ERROR_SHARING_VIOLATION:
-       case ERROR_LOCK_VIOLATION:
-       case ERROR_SHARING_BUFFER_EXCEEDED:
-               errno = EACCES;
-               break;
-       case ERROR_BUFFER_OVERFLOW:
-               errno = ENAMETOOLONG;
-               break;
-       case ERROR_NOT_ENOUGH_MEMORY:
-               errno = ENOMEM;
-               break;
-       default:
-               errno = ENOENT;
-               break;
-       }
        return -1;
 }
 
@@ -130,19 +104,11 @@ int mingw_fstat(int fd, struct stat *buf)
                return fstat(fd, buf);
 
        if (GetFileInformationByHandle(fh, &fdata)) {
-               int fMode = S_IREAD;
-               if (fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
-                       fMode |= S_IFDIR;
-               else
-                       fMode |= S_IFREG;
-               if (!(fdata.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
-                       fMode |= S_IWRITE;
-
                buf->st_ino = 0;
                buf->st_gid = 0;
                buf->st_uid = 0;
                buf->st_nlink = 1;
-               buf->st_mode = fMode;
+               buf->st_mode = file_attr_to_st_mode(fdata.dwFileAttributes);
                buf->st_size = fdata.nFileSizeLow; /* Can't use nFileSizeHigh, since it's not a stat64 */
                buf->st_dev = buf->st_rdev = 0; /* not used by Git */
                buf->st_atime = filetime_to_time_t(&(fdata.ftLastAccessTime));

diff --git a/compat/win32.h b/compat/win32.h
new file mode 100644 (file)
index 0000000..c26384e
--- /dev/null
+++ b/compat/win32.h
@@ -0,0 +1,34 @@
+/* common Win32 functions for MinGW and Cygwin */
+#include <windows.h>
+
+static inline int file_attr_to_st_mode (DWORD attr)
+{
+       int fMode = S_IREAD;
+       if (attr & FILE_ATTRIBUTE_DIRECTORY)
+               fMode |= S_IFDIR;
+       else
+               fMode |= S_IFREG;
+       if (!(attr & FILE_ATTRIBUTE_READONLY))
+               fMode |= S_IWRITE;
+       return fMode;
+}
+
+static inline int get_file_attr(const char *fname, WIN32_FILE_ATTRIBUTE_DATA *fdata)
+{
+       if (GetFileAttributesExA(fname, GetFileExInfoStandard, fdata))
+               return 0;
+
+       switch (GetLastError()) {
+       case ERROR_ACCESS_DENIED:
+       case ERROR_SHARING_VIOLATION:
+       case ERROR_LOCK_VIOLATION:
+       case ERROR_SHARING_BUFFER_EXCEEDED:
+               return EACCES;
+       case ERROR_BUFFER_OVERFLOW:
+               return ENAMETOOLONG;
+       case ERROR_NOT_ENOUGH_MEMORY:
+               return ENOMEM;
+       default:
+               return ENOENT;
+       }
+}