+
+/* opt_isdir section */
+#ifdef _WIN32
+# include <windows.h>
+int opt_isdir(const char *name)
+{
+ DWORD attr;
+# if defined(UNICODE) || defined(_UNICODE)
+ size_t i, len_0 = strlen(name) + 1;
+ WCHAR tempname[MAX_PATH];
+
+ if (len_0 > MAX_PATH)
+ return -1;
+
+# if !defined(_WIN32_WCE) || _WIN32_WCE>=101
+ if (!MultiByteToWideChar(CP_ACP, 0, name, len_0, tempname, MAX_PATH))
+# endif
+ for (i = 0; i < len_0; i++)
+ tempname[i] = (WCHAR)name[i];
+
+ attr = GetFileAttributes(tempname);
+# else
+ attr = GetFileAttributes(name);
+# endif
+ if (attr == INVALID_FILE_ATTRIBUTES)
+ return -1;
+ return ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0);
+}
+#else
+# include <sys/stat.h>
+# ifndef S_ISDIR
+# if defined(_S_IFMT) && defined(_S_IFDIR)
+# define S_ISDIR(a) (((a) & _S_IFMT) == _S_IFDIR)
+# else
+# define S_ISDIR(a) (((a) & S_IFMT) == S_IFDIR)
+# endif
+# endif
+
+int opt_isdir(const char *name)
+{
+# if defined(S_ISDIR)
+ struct stat st;
+
+ if (stat(name, &st) == 0)
+ return S_ISDIR(st.st_mode);
+ else
+ return -1;
+# else
+ return -1;
+# endif
+}
+#endif