Libc-594.9.5.tar.gz

[apple/libc.git] / locale / FreeBSD / runetype.c

diff --git a/locale/FreeBSD/runetype.c b/locale/FreeBSD/runetype.c
index e84363785502ba036709b573563f0d428328d465..2536c557bd53ef59709a0f5040ac73dcc698e643 100644 (file)
--- a/locale/FreeBSD/runetype.c
+++ b/locale/FreeBSD/runetype.c
@@ -35,30 +35,34 @@
  */
 
 #include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/locale/runetype.c,v 1.8 2002/08/21 16:19:56 mike Exp $");
+__FBSDID("$FreeBSD: src/lib/libc/locale/runetype.c,v 1.11 2004/07/29 06:16:19 tjr Exp $");
 
 #include <stdio.h>
-#include <rune.h>
+#include <runetype.h>
 
 unsigned long
 ___runetype(c)
        __ct_rune_t c;
 {
-       int x;
-       _RuneRange *rr = &_CurrentRuneLocale->runetype_ext;
-       _RuneEntry *re = rr->ranges;
+       size_t lim;
+       _RuneRange *rr = &_CurrentRuneLocale->__runetype_ext;
+       _RuneEntry *base, *re;
 
        if (c < 0 || c == EOF)
                return(0L);
 
-       for (x = 0; x < rr->nranges; ++x, ++re) {
-               if (c < re->min)
-                       return(0L);
-               if (c <= re->max) {
-                       if (re->types)
-                           return(re->types[c - re->min]);
+       /* Binary search -- see bsearch.c for explanation. */
+       base = rr->__ranges;
+       for (lim = rr->__nranges; lim != 0; lim >>= 1) {
+               re = base + (lim >> 1);
+               if (re->__min <= c && c <= re->__max) {
+                       if (re->__types)
+                           return(re->__types[c - re->__min]);
                        else
-                           return(re->map);
+                           return(re->__map);
+               } else if (c > re->__max) {
+                       base = re + 1;
+                       lim--;
                }
        }