1*404b540aSrobert /* Symbol concatenation utilities. 2*404b540aSrobert 3*404b540aSrobert Copyright (C) 1998, 2000 Free Software Foundation, Inc. 4*404b540aSrobert 5*404b540aSrobert This program is free software; you can redistribute it and/or modify 6*404b540aSrobert it under the terms of the GNU General Public License as published by 7*404b540aSrobert the Free Software Foundation; either version 2 of the License, or 8*404b540aSrobert (at your option) any later version. 9*404b540aSrobert 10*404b540aSrobert This program is distributed in the hope that it will be useful, 11*404b540aSrobert but WITHOUT ANY WARRANTY; without even the implied warranty of 12*404b540aSrobert MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13*404b540aSrobert GNU General Public License for more details. 14*404b540aSrobert 15*404b540aSrobert You should have received a copy of the GNU General Public License along 16*404b540aSrobert with this program; if not, write to the Free Software Foundation, Inc., 17*404b540aSrobert 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ 18*404b540aSrobert 19*404b540aSrobert #ifndef SYM_CAT_H 20*404b540aSrobert #define SYM_CAT_H 21*404b540aSrobert 22*404b540aSrobert #if defined (__STDC__) || defined (ALMOST_STDC) || defined (HAVE_STRINGIZE) 23*404b540aSrobert #define CONCAT2(a,b) a##b 24*404b540aSrobert #define CONCAT3(a,b,c) a##b##c 25*404b540aSrobert #define CONCAT4(a,b,c,d) a##b##c##d 26*404b540aSrobert #define STRINGX(s) #s 27*404b540aSrobert #else 28*404b540aSrobert /* Note one should never pass extra whitespace to the CONCATn macros, 29*404b540aSrobert e.g. CONCAT2(foo, bar) because traditonal C will keep the space between 30*404b540aSrobert the two labels instead of concatenating them. Instead, make sure to 31*404b540aSrobert write CONCAT2(foo,bar). */ 32*404b540aSrobert #define CONCAT2(a,b) a/**/b 33*404b540aSrobert #define CONCAT3(a,b,c) a/**/b/**/c 34*404b540aSrobert #define CONCAT4(a,b,c,d) a/**/b/**/c/**/d 35*404b540aSrobert #define STRINGX(s) "s" 36*404b540aSrobert #endif 37*404b540aSrobert 38*404b540aSrobert #define XCONCAT2(a,b) CONCAT2(a,b) 39*404b540aSrobert #define XCONCAT3(a,b,c) CONCAT3(a,b,c) 40*404b540aSrobert #define XCONCAT4(a,b,c,d) CONCAT4(a,b,c,d) 41*404b540aSrobert 42*404b540aSrobert /* Note the layer of indirection here is typically used to allow 43*404b540aSrobert stringification of the expansion of macros. I.e. "#define foo 44*404b540aSrobert bar", "XSTRING(foo)", to yield "bar". Be aware that this only 45*404b540aSrobert works for __STDC__, not for traditional C which will still resolve 46*404b540aSrobert to "foo". */ 47*404b540aSrobert #define XSTRING(s) STRINGX(s) 48*404b540aSrobert 49*404b540aSrobert #endif /* SYM_CAT_H */ 50