Implement locale-sensitive string collation for MS-Windows. (Bug#18051)

 src/w32proc.c (get_lcid_callback, get_lcid, w32_compare_strings):
 New functions.
 src/w32.h (w32_compare_strings): Add prototype.
 src/w32.c <g_b_init_compare_string_w>: New global flag.
 (globals_of_w32): Initialize it.
 src/sysdep.c (str_collate) [WINDOWSNT]: Implementation for MS-Windows.
 src/fns.c (Fstring_collate_lessp, Fstring_collate_equalp)
 [WINDOWSNT]: Call str_collate on MS-Windows.

 etc/NEWS: Mention that string-collate-* functions are supported on
 MS-Windows as well.

1 files changed, 3 insertions, 0 deletions

diff --git a/src/w32.h b/src/w32.h
index 94f7a962833..68ee14c70e3 100644
--- a/src/w32.h
+++ b/src/w32.h
@@ -210,6 +210,9 @@ extern int sys_link (const char *, const char *);
 extern int w32_memory_info (unsigned long long *, unsigned long long *,
                             unsigned long long *, unsigned long long *);
 
+/* Compare 2 UTF-8 strings in locale-dependent fashion.  */
+extern int w32_compare_strings (const char *, const char *, char *);
+
 #ifdef HAVE_GNUTLS
 #include <gnutls/gnutls.h>