source: arduino-1-6-7/trunk/fuentes/arduino-ide-amd64/hardware/tools/avr/x86_64-pc-linux-gnu/avr/include/symcat.h @ 4837

Last change on this file since 4837 was 4837, checked in by daduve, 2 years ago

Adding new version

File size: 2.1 KB
Line 
1/* Symbol concatenation utilities.
2
3   Copyright (C) 1998-2015 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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