win32: add local dirent implementation

Add a cut down version of the dirent implementation from git.
The git developers said:

  The mingw-runtime implemenation of opendir, readdir and closedir
  sets errno to 0 on success, something that POSIX explicitly
  forbids.

This also avoids having to link against libssp.a (commit 13eb34205)
and reduces the size of the binary by 2KB.

1 files changed, 19 insertions, 0 deletions

diff --git a/win32/dirent.h b/win32/dirent.h
new file mode 100644
index 000000000..b38d0d133
--- /dev/null
+++ b/win32/dirent.h
@@ -0,0 +1,19 @@
+#ifndef DIRENT_H
+#define DIRENT_H
+
+typedef struct DIR DIR;
+
+#define DT_UNKNOWN 0
+#define DT_DIR     1
+#define DT_REG     2
+#define DT_LNK     3
+
+struct dirent {
+        char d_name[PATH_MAX];  // file name
+};
+
+DIR *opendir(const char *dirname);
+struct dirent *readdir(DIR *dir);
+int closedir(DIR *dir);
+
+#endif /* DIRENT_H */