* lisp.h (str_collate):

* sysdep.c (str_collate): Return int.
(str_collate) [__STDC_ISO_10646__]: Propagate error of wcscoll.

3 files changed, 12 insertions, 3 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 33fea805898..d7066b823b9 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,9 @@
+2014-08-27  Michael Albinus  <michael.albinus@gmx.de>
+
+        * lisp.h (str_collate):
+        * sysdep.c (str_collate): Return int.
+        (str_collate) [__STDC_ISO_10646__]: Propagate error of wcscoll.
+
 2014-08-27  Dmitry Antipov  <dmantipov@yandex.ru>
 
         Fix some glitches in previous change.
diff --git a/src/lisp.h b/src/lisp.h
index 012e5fad18d..b9f456b3745 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -4298,7 +4298,7 @@ extern void lock_file (Lisp_Object);
 extern void unlock_file (Lisp_Object);
 extern void unlock_buffer (struct buffer *);
 extern void syms_of_filelock (void);
-extern ptrdiff_t str_collate (Lisp_Object, Lisp_Object);
+extern int str_collate (Lisp_Object, Lisp_Object);
 
 /* Defined in sound.c.  */
 extern void syms_of_sound (void);
diff --git a/src/sysdep.c b/src/sysdep.c
index 7b93cb93b85..4b0f54ebe6e 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -3606,7 +3606,7 @@ system_process_attributes (Lisp_Object pid)
 #  define setlocale(category, locale) ((char *) 0)
 # endif
 
-ptrdiff_t
+int
 str_collate (Lisp_Object s1, Lisp_Object s2)
 {
   ptrdiff_t res, len, i, i_byte;
@@ -3653,7 +3653,10 @@ str_collate (Lisp_Object s1, Lisp_Object s2)
 #endif
     }
 
+  errno = 0;
   res = wcscoll (p1, p2);
+  if (errno)
+    error ("Wrong argument: %s", strerror (errno));
 
 #ifdef HAVE_USELOCALE
   /* Free the locale object, and reset.  */
@@ -3674,7 +3677,7 @@ str_collate (Lisp_Object s1, Lisp_Object s2)
 #endif /* __STDC_ISO_10646__ */
 
 #ifdef WINDOWSNT
-ptrdiff_t
+int
 str_collate (Lisp_Object s1, Lisp_Object s2)
 {
   Lisp_Object lc_collate =