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Added a macro for concatenation of two strings, which may be macro expansions

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adamdunkels 2008-01-14 09:22:22 +00:00
parent 4c131d6975
commit 3d17762735
1 changed files with 12 additions and 1 deletions
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13
core/sys/cc.h
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@ -39,7 +39,7 @@
* *
* This file is part of the Contiki desktop OS * This file is part of the Contiki desktop OS
* *
* $Id: cc.h,v 1.4 2007/11/18 01:37:48 oliverschmidt Exp $ * $Id: cc.h,v 1.5 2008/01/14 09:22:22 adamdunkels Exp $
* *
*/ */
#ifndef __CC_H__ #ifndef __CC_H__
@ -117,4 +117,15 @@
#ifndef NULL #ifndef NULL
#define NULL 0 #define NULL 0
#endif /* NULL */ #endif /* NULL */
#define CC_CONCAT2(s1, s2) s1##s2
/**
* A C preprocessing macro for concatenating to
* strings.
*
* We need use two macros (CC_CONCAT and CC_CONCAT2) in order to allow
* concatenation of two #defined macros.
*/
#define CC_CONCAT(s1, s2) CC_CONCAT2(s1, s2)
#endif /* __CC_H__ */ #endif /* __CC_H__ */