| /* Symbol concatenation utilities. |
| |
| Copyright (C) 1998-2018 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., |
| 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, 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 CONCAT5(a,b,c,d,e) a##b##c##d##e |
| #define CONCAT6(a,b,c,d,e,f) a##b##c##d##e##f |
| #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 CONCAT5(a,b,c,d,e) a/**/b/**/c/**/d/**/e |
| #define CONCAT6(a,b,c,d,e,f) a/**/b/**/c/**/d/**/e/**/f |
| #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) |
| #define XCONCAT5(a,b,c,d,e) CONCAT5(a,b,c,d,e) |
| #define XCONCAT6(a,b,c,d,e,f) CONCAT6(a,b,c,d,e,f) |
| |
| /* 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 */ |