NEWS.stable: log cherry-pick [e446f25]->[c092018] relocatable-shell: Update suggested...

[gnulib.git] / lib / unistr / u8-mbsnlen.c

diff --git a/lib/unistr/u8-mbsnlen.c b/lib/unistr/u8-mbsnlen.c
index 913bbf0..e21ae32 100644 (file)
--- a/lib/unistr/u8-mbsnlen.c
+++ b/lib/unistr/u8-mbsnlen.c
@@ -1,5 +1,5 @@
 /* Count characters in UTF-8 string.
-   Copyright (C) 2007, 2009-2010 Free Software Foundation, Inc.
+   Copyright (C) 2007, 2009-2014 Free Software Foundation, Inc.
    Written by Bruno Haible <bruno@clisp.org>, 2007.
 
    This program is free software: you can redistribute it and/or modify it
@@ -28,12 +28,17 @@ u8_mbsnlen (const uint8_t *s, size_t n)
   characters = 0;
   while (n > 0)
     {
-      int count = u8_mblen (s, n);
-      if (count <= 0)
+      ucs4_t uc;
+      int count = u8_mbtoucr (&uc, s, n);
+      characters++;
+      if (count == -2)
+        break;
+      if (count < 0)
+        count = u8_mbtouc (&uc, s, n);
+      else if (count == 0)
         count = 1;
       s += count;
       n -= count;
-      characters++;
     }
   return characters;
 }