1 /*
2  * compiler directive on Plan 9
3  */
4 #ifndef USED
5 #define USED(x) if(x);else
6 #endif
7 
8 /*
9  * easiest way to make sure these are defined
10  */
11 #define uchar	_utfuchar
12 #define ushort	_utfushort
13 #define uint	_utfuint
14 #define ulong	_utfulong
15 typedef unsigned char		uchar;
16 typedef unsigned short		ushort;
17 typedef unsigned int		uint;
18 typedef unsigned long		ulong;
19 
20 /*
21  * nil cannot be ((void*)0) on ANSI C,
22  * because it is used for function pointers
23  */
24 #undef	nil
25 #define	nil	0
26 
27 #undef	nelem
28 #define	nelem(x)	(sizeof (x)/sizeof (x)[0])