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/* Symbol concatenation utilities.
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Copyright (C) 1998, Free Software Foundation, Inc.
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Copyright (C) 1998, 2000 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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#if defined (__STDC__) || defined (ALMOST_STDC)
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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 STRINGX(s) #s
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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 STRINGX(s) "?"
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#define STRINGX(s) "s"
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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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/* 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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#define XSTRING(s) STRINGX(s)
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#endif /* SYM_CAT_H */