1 files changed, 81 insertions, 0 deletions
diff --git a/locale/coll-lookup.c b/locale/coll-lookup.c
new file mode 100644
index 0000000000..6c765727cc
--- /dev/null
+++ b/locale/coll-lookup.c
@@ -0,0 +1,81 @@
+/* Copyright (C) 2000, 2003 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Bruno Haible <haible@clisp.cons.org>, 2000.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <stdint.h>
+
+/* Lookup in a table of int32_t, with default value 0.  */
+int32_t
+internal_function
+__collidx_table_lookup (const char *table, uint32_t wc)
+{
+  uint32_t shift1 = ((const uint32_t *) table)[0];
+  uint32_t index1 = wc >> shift1;
+  uint32_t bound = ((const uint32_t *) table)[1];
+  if (index1 < bound)
+    {
+      uint32_t lookup1 = ((const uint32_t *) table)[5 + index1];
+      if (lookup1 != 0)
+	{
+	  uint32_t shift2 = ((const uint32_t *) table)[2];
+	  uint32_t mask2 = ((const uint32_t *) table)[3];
+	  uint32_t index2 = (wc >> shift2) & mask2;
+	  uint32_t lookup2 = ((const uint32_t *)(table + lookup1))[index2];
+	  if (lookup2 != 0)
+	    {
+	      uint32_t mask3 = ((const uint32_t *) table)[4];
+	      uint32_t index3 = wc & mask3;
+	      int32_t lookup3 = ((const int32_t *)(table + lookup2))[index3];
+
+	      return lookup3;
+	    }
+	}
+    }
+  return 0;
+}
+
+
+/* Lookup in a table of uint32_t, with default value 0xffffffff.  */
+uint32_t
+internal_function
+__collseq_table_lookup (const char *table, uint32_t wc)
+{
+  uint32_t shift1 = ((const uint32_t *) table)[0];
+  uint32_t index1 = wc >> shift1;
+  uint32_t bound = ((const uint32_t *) table)[1];
+  if (index1 < bound)
+    {
+      uint32_t lookup1 = ((const uint32_t *) table)[5 + index1];
+      if (lookup1 != 0)
+	{
+	  uint32_t shift2 = ((const uint32_t *) table)[2];
+	  uint32_t mask2 = ((const uint32_t *) table)[3];
+	  uint32_t index2 = (wc >> shift2) & mask2;
+	  uint32_t lookup2 = ((const uint32_t *)(table + lookup1))[index2];
+	  if (lookup2 != 0)
+	    {
+	      uint32_t mask3 = ((const uint32_t *) table)[4];
+	      uint32_t index3 = wc & mask3;
+	      uint32_t lookup3 = ((const uint32_t *)(table + lookup2))[index3];
+
+	      return lookup3;
+	    }
+	}
+    }
+  return ~((uint32_t) 0);
+}