Changes to m4/m4/m4module.h,v

[Eric Blake]

CVSROOT:        /sources/m4
Module name:    m4
Changes by:     Eric Blake <ericb>      07/01/06 19:56:54

Index: m4/m4module.h
===================================================================
RCS file: /sources/m4/m4/m4/m4module.h,v
retrieving revision 1.102
retrieving revision 1.103
diff -u -b -r1.102 -r1.103
--- m4/m4module.h       23 Dec 2006 00:02:20 -0000      1.102
+++ m4/m4module.h       6 Jan 2007 19:56:53 -0000       1.103
@@ -1,7 +1,7 @@
 /* GNU m4 -- A simple macro processor
 
    Copyright (C) 1989, 1990, 1991, 1992, 1993, 1994, 1999, 2000, 2003,
-   2004, 2005, 2006 Free Software Foundation, Inc.
+   2004, 2005, 2006, 2007 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -440,6 +440,16 @@
 #define obstack_chunk_alloc    xmalloc
 #define obstack_chunk_free     free
 
+
+/* Convert a possibly-signed character to an unsigned character.  This is
+   a bit safer than casting to unsigned char, since it catches some type
+   errors that the cast doesn't.  */
+#if HAVE_INLINE
+static inline unsigned char to_uchar (char ch) { return ch; }
+#else
+# define to_uchar(C) ((unsigned char) (C))
+#endif
+
 END_C_DECLS
 
 #endif /* !M4MODULE_H */