--- a/lib/ChangeLog
+++ b/lib/ChangeLog
@@ -1,3 +1,11 @@
+2004-12-28  Simon Josefsson  <jas@extundo.com>
+
+	* base64.h (isbase64): Add.
+
+	* base64.c (isb64): Rename to isbase64, use to_uchar instead of
+	using a unsigned prototype, don't inline.
+	(base64_decode): Use it.
+
 2005-01-19  Bruno Haible  <bruno@clisp.org>
 
 	* sh-quote.h: New file, from GNU gettext.

--- a/lib/base64.c
+++ b/lib/base64.c
@@ -274,10 +274,10 @@
   B64 (252), B64 (253), B64 (254), B64 (255)
 };
 
-static inline bool
-isb64 (unsigned char ch)
+bool
+isbase64 (char ch)
 {
-  return ch <= 255 && 0 <= b64[ch];
+  return to_uchar (ch) <= 255 && 0 <= b64[to_uchar (ch)];
 }
 
 /* Decode base64 encoded input array IN of length INLEN to output
@@ -295,7 +295,7 @@
 
   while (inlen >= 2)
     {
-      if (!isb64 (in[0]) || !isb64 (in[1]))
+      if (!isbase64 (in[0]) || !isbase64 (in[1]))
 	break;
 
       if (outleft)
@@ -319,7 +319,7 @@
 	}
       else
 	{
-	  if (!isb64 (in[2]))
+	  if (!isbase64 (in[2]))
 	    break;
 
 	  if (outleft)
@@ -339,7 +339,7 @@
 	    }
 	  else
 	    {
-	      if (!isb64 (in[3]))
+	      if (!isbase64 (in[3]))
 		break;
 
 	      if (outleft)

--- a/lib/base64.h
+++ b/lib/base64.h
@@ -29,6 +29,8 @@
    integer >= n/k, i.e., the ceiling of n/k.  */
 #define BASE64_LENGTH(inlen) ((((inlen) + 2) / 3) * 4)
 
+extern bool isbase64 (char ch);
+
 extern void base64_encode (const char *restrict in, size_t inlen,
 			   char *restrict out, size_t outlen);