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cell-binutils  2.17cvs20070401
symcat.h
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00001 /* Symbol concatenation utilities.
00002 
00003    Copyright (C) 1998, 2000 Free Software Foundation, Inc.
00004 
00005    This program is free software; you can redistribute it and/or modify
00006    it under the terms of the GNU General Public License as published by
00007    the Free Software Foundation; either version 2 of the License, or
00008    (at your option) any later version.
00009 
00010    This program is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013    GNU General Public License for more details.
00014  
00015    You should have received a copy of the GNU General Public License along
00016    with this program; if not, write to the Free Software Foundation, Inc.,
00017    51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
00018 
00019 #ifndef SYM_CAT_H
00020 #define SYM_CAT_H
00021 
00022 #if defined (__STDC__) || defined (ALMOST_STDC) || defined (HAVE_STRINGIZE)
00023 #define CONCAT2(a,b)  a##b
00024 #define CONCAT3(a,b,c)       a##b##c
00025 #define CONCAT4(a,b,c,d) a##b##c##d
00026 #define STRINGX(s) #s
00027 #else
00028 /* Note one should never pass extra whitespace to the CONCATn macros,
00029    e.g. CONCAT2(foo, bar) because traditonal C will keep the space between
00030    the two labels instead of concatenating them.  Instead, make sure to
00031    write CONCAT2(foo,bar).  */
00032 #define CONCAT2(a,b)  ab
00033 #define CONCAT3(a,b,c)       abc
00034 #define CONCAT4(a,b,c,d) abcd
00035 #define STRINGX(s) "s"
00036 #endif
00037 
00038 #define XCONCAT2(a,b)     CONCAT2(a,b)
00039 #define XCONCAT3(a,b,c)   CONCAT3(a,b,c)
00040 #define XCONCAT4(a,b,c,d) CONCAT4(a,b,c,d)
00041 
00042 /* Note the layer of indirection here is typically used to allow
00043    stringification of the expansion of macros.  I.e. "#define foo
00044    bar", "XSTRING(foo)", to yield "bar".  Be aware that this only
00045    works for __STDC__, not for traditional C which will still resolve
00046    to "foo".  */
00047 #define XSTRING(s) STRINGX(s) 
00048 
00049 #endif /* SYM_CAT_H */