made a lot of changes

lang/cem/libcc.ansi/time/clock.c

@@ -4,16 +4,82 @@
 /* $Header$ */
 
 #include	<time.h>
-#include	<sys/time.h>
-#include	<sys/resource.h>
+
+#if	defined(__BSD4_2)
+
+struct timeval {
+	long	tv_sec;			/* seconds */
+	long	tv_usec;		/* and microseconds */
+};
+
+#define	RUSAGE_SELF	0
+#define	RUSAGE_CHILDREN	-1
+
+struct rusage {
+	struct timeval ru_utime;	/* user time used */
+	struct timeval ru_stime;	/* system time used */
+	long	ru_maxrss;
+	long	ru_ixrss;		/* integral shared memory size */
+	long	ru_idrss;		/* integral unshared data size */
+	long	ru_isrss;		/* integral unshared stack size */
+	long	ru_minflt;		/* page reclaims */
+	long	ru_majflt;		/* page faults */
+	long	ru_nswap;		/* swaps */
+	long	ru_inblock;		/* block input operations */
+	long	ru_oublock;		/* block output operations */
+	long	ru_msgsnd;		/* messages sent */
+	long	ru_msgrcv;		/* messages received */
+	long	ru_nsignals;		/* signals received */
+	long	ru_nvcsw;		/* voluntary context switches */
+	long	ru_nivcsw;		/* involuntary context switches */
+};
+
+void getrusage(int who, struct rusage *rusage);
+
+#elif	defined(_POSIX_SOURCE) || defined(__USG)
+
+struct tms {
+	time_t	tms_utime;		/* user time */
+	time_t	tms_stime;		/* system time */
+	time_t	tms_cutime;		/* user time, children */
+	time_t	tms_cstime;		/* system time, children */
+};
+
+long times(struct tms *buffer);
+
+#else					/* Version 7 UNIX */
+
+struct tbuffer {
+	long proc_user_time;
+	long proc_system_time;
+	long child_user_time;
+	long child_system_time;
+};
+
+long times(struct tbuffer *buffer);
+
+#endif
 
 clock_t
 clock(void)
 {
+#if	defined(__BSD4_2)
 	struct rusage rusage;
 
 	getrusage(RUSAGE_SELF, &rusage);
 
-	return (((unsigned long)rusage.ru_utime.tv_sec * CLK_TCK)
-		    + rusage.ru_utime.tv_usec);
+	return (((unsigned long)rusage.ru_utime.tv_sec * CLOCKS_PER_SEC)
+		+ rusage.ru_utime.tv_usec);
+#elif	defined(_POSIX_SOURCE) || defined(__USG)
+	struct tms tms;
+
+	times(&tms);
+	/* Assume that time_t can be converted to clock_t for Sys5 */
+	return tms.tms_utime;
+#else
+	struct tbuffer tbuffer;
+
+	times(&tbuffer);
+	return tbuffer.proc_user_time;
+#endif
 }