binutils (2.41)
1 /* Symbol concatenation utilities.
2
3 Copyright (C) 1998-2023 Free Software Foundation, Inc.
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License along
16 with this program; if not, write to the Free Software Foundation, Inc.,
17 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
18
19 #ifndef SYM_CAT_H
20 #define SYM_CAT_H
21
22 #if defined (__STDC__) || defined (ALMOST_STDC) || defined (HAVE_STRINGIZE)
23 #define CONCAT2(a,b) a##b
24 #define CONCAT3(a,b,c) a##b##c
25 #define CONCAT4(a,b,c,d) a##b##c##d
26 #define CONCAT5(a,b,c,d,e) a##b##c##d##e
27 #define CONCAT6(a,b,c,d,e,f) a##b##c##d##e##f
28 #define STRINGX(s) #s
29 #else
30 /* Note one should never pass extra whitespace to the CONCATn macros,
31 e.g. CONCAT2(foo, bar) because traditonal C will keep the space between
32 the two labels instead of concatenating them. Instead, make sure to
33 write CONCAT2(foo,bar). */
34 #define CONCAT2(a,b) a/**/b
35 #define CONCAT3(a,b,c) a/**/b/**/c
36 #define CONCAT4(a,b,c,d) a/**/b/**/c/**/d
37 #define CONCAT5(a,b,c,d,e) a/**/b/**/c/**/d/**/e
38 #define CONCAT6(a,b,c,d,e,f) a/**/b/**/c/**/d/**/e/**/f
39 #define STRINGX(s) "s"
40 #endif
41
42 #define XCONCAT2(a,b) CONCAT2(a,b)
43 #define XCONCAT3(a,b,c) CONCAT3(a,b,c)
44 #define XCONCAT4(a,b,c,d) CONCAT4(a,b,c,d)
45 #define XCONCAT5(a,b,c,d,e) CONCAT5(a,b,c,d,e)
46 #define XCONCAT6(a,b,c,d,e,f) CONCAT6(a,b,c,d,e,f)
47
48 /* Note the layer of indirection here is typically used to allow
49 stringification of the expansion of macros. I.e. "#define foo
50 bar", "XSTRING(foo)", to yield "bar". Be aware that this only
51 works for __STDC__, not for traditional C which will still resolve
52 to "foo". */
53 #define XSTRING(s) STRINGX(s)
54
55 #endif /* SYM_CAT_H */
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