difftime.c
上传用户:baixin
上传日期:2008-03-13
资源大小:4795k
文件大小:1k
- /* difftime.c - difftime file for time */
- /* Copyright 1992-1993 Wind River Systems, Inc. */
- /*
- modification history
- --------------------
- 01d,04oct01,dcb Fix SPR 7191. Cast time1 and time2 before subtracting.
- 01c,05feb93,jdi documentation cleanup for 5.1.
- 01b,20sep92,smb documentation additions
- 01a,25jul92,smb written.
- */
- /*
- DESCRIPTION
-
- INCLUDE FILE: time.h
-
- SEE ALSO: American National Standard X3.159-1989
- NOMANUAL
- */
- #include "vxWorks.h"
- #include "time.h"
- /*******************************************************************************
- *
- * difftime - compute the difference between two calendar times (ANSI)
- *
- * This routine computes the difference between two calendar times:
- * <time1> - <time0>.
- *
- * INCLUDE FILES: time.h
- *
- * RETURNS: The time difference in seconds, expressed as a double.
- */
-
- double difftime
- (
- time_t time1, /* later time, in seconds */
- time_t time0 /* earlier time, in seconds */
- )
- {
- /* This function assumes that sizeof(time_t) is <= sizeof(double). */
-
- return (double)time1 - (double)time0;
- }