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/* Symbol concatenation utilities. |
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Copyright (C) 1998-2021 Free Software Foundation, Inc. |
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License along |
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with this program; if not, write to the Free Software Foundation, Inc., |
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51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
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#ifndef SYM_CAT_H |
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#define SYM_CAT_H |
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|
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#if defined (__STDC__) || defined (ALMOST_STDC) || defined (HAVE_STRINGIZE) |
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#define CONCAT2(a,b) a##b |
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#define CONCAT3(a,b,c) a##b##c |
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#define CONCAT4(a,b,c,d) a##b##c##d |
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#define CONCAT5(a,b,c,d,e) a##b##c##d##e |
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#define CONCAT6(a,b,c,d,e,f) a##b##c##d##e##f |
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#define STRINGX(s) #s |
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#else |
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/* Note one should never pass extra whitespace to the CONCATn macros, |
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e.g. CONCAT2(foo, bar) because traditonal C will keep the space between |
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the two labels instead of concatenating them. Instead, make sure to |
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write CONCAT2(foo,bar). */ |
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#define CONCAT2(a,b) a/**/b |
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#define CONCAT3(a,b,c) a/**/b/**/c |
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#define CONCAT4(a,b,c,d) a/**/b/**/c/**/d |
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#define CONCAT5(a,b,c,d,e) a/**/b/**/c/**/d/**/e |
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#define CONCAT6(a,b,c,d,e,f) a/**/b/**/c/**/d/**/e/**/f |
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#define STRINGX(s) "s" |
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#endif |
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|
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#define XCONCAT2(a,b) CONCAT2(a,b) |
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#define XCONCAT3(a,b,c) CONCAT3(a,b,c) |
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#define XCONCAT4(a,b,c,d) CONCAT4(a,b,c,d) |
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#define XCONCAT5(a,b,c,d,e) CONCAT5(a,b,c,d,e) |
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#define XCONCAT6(a,b,c,d,e,f) CONCAT6(a,b,c,d,e,f) |
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/* Note the layer of indirection here is typically used to allow |
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stringification of the expansion of macros. I.e. "#define foo |
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bar", "XSTRING(foo)", to yield "bar". Be aware that this only |
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works for __STDC__, not for traditional C which will still resolve |
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to "foo". */ |
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#define XSTRING(s) STRINGX(s) |
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|
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#endif /* SYM_CAT_H */ |
