1*e4b17023SJohn Marino /* Symbol concatenation utilities. 2*e4b17023SJohn Marino 3*e4b17023SJohn Marino Copyright (C) 1998, 2000, 2010 Free Software Foundation, Inc. 4*e4b17023SJohn Marino 5*e4b17023SJohn Marino This program is free software; you can redistribute it and/or modify 6*e4b17023SJohn Marino it under the terms of the GNU General Public License as published by 7*e4b17023SJohn Marino the Free Software Foundation; either version 2 of the License, or 8*e4b17023SJohn Marino (at your option) any later version. 9*e4b17023SJohn Marino 10*e4b17023SJohn Marino This program is distributed in the hope that it will be useful, 11*e4b17023SJohn Marino but WITHOUT ANY WARRANTY; without even the implied warranty of 12*e4b17023SJohn Marino MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13*e4b17023SJohn Marino GNU General Public License for more details. 14*e4b17023SJohn Marino 15*e4b17023SJohn Marino You should have received a copy of the GNU General Public License along 16*e4b17023SJohn Marino with this program; if not, write to the Free Software Foundation, Inc., 17*e4b17023SJohn Marino 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 18*e4b17023SJohn Marino 19*e4b17023SJohn Marino #ifndef SYM_CAT_H 20*e4b17023SJohn Marino #define SYM_CAT_H 21*e4b17023SJohn Marino 22*e4b17023SJohn Marino #if defined (__STDC__) || defined (ALMOST_STDC) || defined (HAVE_STRINGIZE) 23*e4b17023SJohn Marino #define CONCAT2(a,b) a##b 24*e4b17023SJohn Marino #define CONCAT3(a,b,c) a##b##c 25*e4b17023SJohn Marino #define CONCAT4(a,b,c,d) a##b##c##d 26*e4b17023SJohn Marino #define CONCAT5(a,b,c,d,e) a##b##c##d##e 27*e4b17023SJohn Marino #define CONCAT6(a,b,c,d,e,f) a##b##c##d##e##f 28*e4b17023SJohn Marino #define STRINGX(s) #s 29*e4b17023SJohn Marino #else 30*e4b17023SJohn Marino /* Note one should never pass extra whitespace to the CONCATn macros, 31*e4b17023SJohn Marino e.g. CONCAT2(foo, bar) because traditonal C will keep the space between 32*e4b17023SJohn Marino the two labels instead of concatenating them. Instead, make sure to 33*e4b17023SJohn Marino write CONCAT2(foo,bar). */ 34*e4b17023SJohn Marino #define CONCAT2(a,b) a/**/b 35*e4b17023SJohn Marino #define CONCAT3(a,b,c) a/**/b/**/c 36*e4b17023SJohn Marino #define CONCAT4(a,b,c,d) a/**/b/**/c/**/d 37*e4b17023SJohn Marino #define CONCAT5(a,b,c,d,e) a/**/b/**/c/**/d/**/e 38*e4b17023SJohn Marino #define CONCAT6(a,b,c,d,e,f) a/**/b/**/c/**/d/**/e/**/f 39*e4b17023SJohn Marino #define STRINGX(s) "s" 40*e4b17023SJohn Marino #endif 41*e4b17023SJohn Marino 42*e4b17023SJohn Marino #define XCONCAT2(a,b) CONCAT2(a,b) 43*e4b17023SJohn Marino #define XCONCAT3(a,b,c) CONCAT3(a,b,c) 44*e4b17023SJohn Marino #define XCONCAT4(a,b,c,d) CONCAT4(a,b,c,d) 45*e4b17023SJohn Marino #define XCONCAT5(a,b,c,d,e) CONCAT5(a,b,c,d,e) 46*e4b17023SJohn Marino #define XCONCAT6(a,b,c,d,e,f) CONCAT6(a,b,c,d,e,f) 47*e4b17023SJohn Marino 48*e4b17023SJohn Marino /* Note the layer of indirection here is typically used to allow 49*e4b17023SJohn Marino stringification of the expansion of macros. I.e. "#define foo 50*e4b17023SJohn Marino bar", "XSTRING(foo)", to yield "bar". Be aware that this only 51*e4b17023SJohn Marino works for __STDC__, not for traditional C which will still resolve 52*e4b17023SJohn Marino to "foo". */ 53*e4b17023SJohn Marino #define XSTRING(s) STRINGX(s) 54*e4b17023SJohn Marino 55*e4b17023SJohn Marino #endif /* SYM_CAT_H */ 56