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1 /*2 * compiler directive on Plan 93 */4 #ifndef USED5 #define USED(x) if(x);else6 #endif8 /*9 * easiest way to make sure these are defined10 */11 #define uchar _utfuchar12 #define ushort _utfushort13 #define uint _utfuint14 #define ulong _utfulong15 typedef unsigned char uchar;16 typedef unsigned short ushort;17 typedef unsigned int uint;18 typedef unsigned long ulong;20 /*21 * nil cannot be ((void*)0) on ANSI C,22 * because it is used for function pointers23 */24 #undef nil25 #define nil 027 #undef nelem28 #define nelem(x) (sizeof (x)/sizeof (x)[0])