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      1       1.1     skrll /* Symbol concatenation utilities.
      2       1.1     skrll 
      3  1.1.1.10  christos    Copyright (C) 1998-2026 Free Software Foundation, Inc.
      4       1.1     skrll 
      5       1.1     skrll    This program is free software; you can redistribute it and/or modify
      6       1.1     skrll    it under the terms of the GNU General Public License as published by
      7       1.1     skrll    the Free Software Foundation; either version 2 of the License, or
      8       1.1     skrll    (at your option) any later version.
      9       1.1     skrll 
     10       1.1     skrll    This program is distributed in the hope that it will be useful,
     11       1.1     skrll    but WITHOUT ANY WARRANTY; without even the implied warranty of
     12       1.1     skrll    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     13       1.1     skrll    GNU General Public License for more details.
     14       1.1     skrll 
     15       1.1     skrll    You should have received a copy of the GNU General Public License along
     16       1.1     skrll    with this program; if not, write to the Free Software Foundation, Inc.,
     17       1.1     skrll    51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
     18       1.1     skrll 
     19       1.1     skrll #ifndef SYM_CAT_H
     20       1.1     skrll #define SYM_CAT_H
     21       1.1     skrll 
     22       1.1     skrll #if defined (__STDC__) || defined (ALMOST_STDC) || defined (HAVE_STRINGIZE)
     23       1.1     skrll #define CONCAT2(a,b)	 a##b
     24       1.1     skrll #define CONCAT3(a,b,c)	 a##b##c
     25       1.1     skrll #define CONCAT4(a,b,c,d) a##b##c##d
     26   1.1.1.2  christos #define CONCAT5(a,b,c,d,e) a##b##c##d##e
     27   1.1.1.2  christos #define CONCAT6(a,b,c,d,e,f) a##b##c##d##e##f
     28       1.1     skrll #define STRINGX(s) #s
     29       1.1     skrll #else
     30       1.1     skrll /* Note one should never pass extra whitespace to the CONCATn macros,
     31       1.1     skrll    e.g. CONCAT2(foo, bar) because traditonal C will keep the space between
     32       1.1     skrll    the two labels instead of concatenating them.  Instead, make sure to
     33       1.1     skrll    write CONCAT2(foo,bar).  */
     34       1.1     skrll #define CONCAT2(a,b)	 a/**/b
     35       1.1     skrll #define CONCAT3(a,b,c)	 a/**/b/**/c
     36       1.1     skrll #define CONCAT4(a,b,c,d) a/**/b/**/c/**/d
     37   1.1.1.2  christos #define CONCAT5(a,b,c,d,e) a/**/b/**/c/**/d/**/e
     38   1.1.1.2  christos #define CONCAT6(a,b,c,d,e,f) a/**/b/**/c/**/d/**/e/**/f
     39       1.1     skrll #define STRINGX(s) "s"
     40       1.1     skrll #endif
     41       1.1     skrll 
     42       1.1     skrll #define XCONCAT2(a,b)     CONCAT2(a,b)
     43       1.1     skrll #define XCONCAT3(a,b,c)   CONCAT3(a,b,c)
     44       1.1     skrll #define XCONCAT4(a,b,c,d) CONCAT4(a,b,c,d)
     45   1.1.1.2  christos #define XCONCAT5(a,b,c,d,e) CONCAT5(a,b,c,d,e)
     46   1.1.1.2  christos #define XCONCAT6(a,b,c,d,e,f) CONCAT6(a,b,c,d,e,f)
     47       1.1     skrll 
     48       1.1     skrll /* Note the layer of indirection here is typically used to allow
     49       1.1     skrll    stringification of the expansion of macros.  I.e. "#define foo
     50       1.1     skrll    bar", "XSTRING(foo)", to yield "bar".  Be aware that this only
     51       1.1     skrll    works for __STDC__, not for traditional C which will still resolve
     52       1.1     skrll    to "foo".  */
     53       1.1     skrll #define XSTRING(s) STRINGX(s)
     54       1.1     skrll 
     55       1.1     skrll #endif /* SYM_CAT_H */
     56