win32: try to get link count for directories

On Unix the link count of a directory reflects the number of
subdirectories it contains.  Enhance readdir(3) to return file
types and use this to count subdirectories when stat(2) is called
for a directory.

As with other features that might slow down stat(2) this is
controlled by the build-time setting FEATURE_EXTRA_FILE_DATA.
(Commit d82db8e9a 'win32: make stat(2) fetch additional metadata').

(GitHub issue #254)

1 files changed, 3 insertions, 0 deletions

diff --git a/win32/dirent.h b/win32/dirent.h
index b38d0d133..214f80547 100644
--- a/win32/dirent.h
+++ b/win32/dirent.h
@@ -9,6 +9,9 @@ typedef struct DIR DIR;
 #define DT_LNK     3
 
 struct dirent {
+#if ENABLE_FEATURE_EXTRA_FILE_DATA
+        unsigned char d_type;
+#endif
         char d_name[PATH_MAX];  // file name
 };