Make this module usable in shared libraries.

[gnulib.git] / lib / strnlen.c

diff --git a/lib/strnlen.c b/lib/strnlen.c
index a2fcf73..e7ad6d2 100644 (file)
--- a/lib/strnlen.c
+++ b/lib/strnlen.c
@@ -1,5 +1,5 @@
 /* Find the length of STRING, but scan at most MAXLEN characters.
-   Copyright (C) 1996, 1997, 1998, 2000 Free Software Foundation, Inc.
+   Copyright (C) 1996, 1997, 1998, 2000-2003 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -17,7 +17,37 @@
    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    Boston, MA 02111-1307, USA.  */
 
-#include <string.h>
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+#undef strnlen
+
+#if HAVE_STRING_H
+# if !STDC_HEADERS && HAVE_MEMORY_H
+#  include <memory.h>
+# endif
+# include <string.h>
+#else
+# include <strings.h>
+#endif
+
+#ifndef HAVE_DECL_MEMCHR
+"this configure-time declaration test was not run"
+#endif
+#if !HAVE_DECL_MEMCHR
+char *memchr ();
+#endif
+
+#undef __strnlen
+#undef strnlen
+
+#ifndef _LIBC
+# define strnlen rpl_strnlen
+#endif
+
+#ifndef weak_alias
+# define __strnlen strnlen
+#endif
 
 /* Find the length of STRING, but scan at most MAXLEN characters.
    If no '\0' terminator is found in that many characters, return MAXLEN.  */
@@ -26,7 +56,7 @@ size_t
 __strnlen (const char *string, size_t maxlen)
 {
   const char *end = memchr (string, '\0', maxlen);
-  return end ? end - string : maxlen;
+  return end ? (size_t) (end - string) : maxlen;
 }
 #ifdef weak_alias
 weak_alias (__strnlen, strnlen)