/* Symbol concatenation utilities.

    Copyright (C) 1998, 2000 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

    the Free Software Foundation; either version 2 of the License, or

    (at your option) any later version.

    This program is distributed in the hope that it will be useful,

    but WITHOUT ANY WARRANTY; without even the implied warranty of

    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along

    with this program; if not, write to the Free Software Foundation, Inc.,

    59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */

 #ifndef SYM_CAT_H

 #define SYM_CAT_H

 #if defined (__STDC__) || defined (ALMOST_STDC) || defined (HAVE_STRINGIZE)

 #define CONCAT2(a,b)	 a##b

 #define CONCAT3(a,b,c)	 a##b##c

 #define CONCAT4(a,b,c,d) a##b##c##d

 #define STRINGX(s) #s

 #else

 /* Note one should never pass extra whitespace to the CONCATn macros,

    e.g. CONCAT2(foo, bar) because traditonal C will keep the space between

    the two labels instead of concatenating them.  Instead, make sure to

    write CONCAT2(foo,bar).  */

 #define CONCAT2(a,b)	 a/**/b

 #define CONCAT3(a,b,c)	 a/**/b/**/c

 #define CONCAT4(a,b,c,d) a/**/b/**/c/**/d

 #define STRINGX(s) "s"

 #endif

 #define XCONCAT2(a,b)     CONCAT2(a,b)

 #define XCONCAT3(a,b,c)   CONCAT3(a,b,c)

 #define XCONCAT4(a,b,c,d) CONCAT4(a,b,c,d)

 /* Note the layer of indirection here is typically used to allow

    stringification of the expansion of macros.  I.e. "#define foo

    bar", "XSTRING(foo)", to yield "bar".  Be aware that this only

    works for __STDC__, not for traditional C which will still resolve

    to "foo".  */

 #define XSTRING(s) STRINGX(s) 

 #endif /* SYM_CAT_H */