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-'\" t
-.\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
-.\"
-.\" SPDX-License-Identifier: Linux-man-pages-copyleft
-.\"
-.\" References consulted:
-.\" Linux libc source code
-.\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
-.\" 386BSD man pages
-.\" Modified Sat Jul 24 19:48:17 1993 by Rik Faith (faith@cs.unc.edu)
-.TH difftime 3 (date) "Linux man-pages (unreleased)"
-.SH NAME
-difftime \- calculate time difference
-.SH LIBRARY
-Standard C library
-.RI ( libc ", " \-lc )
-.SH SYNOPSIS
-.nf
-.B #include <time.h>
-.P
-.BI "double difftime(time_t " time1 ", time_t " time0 );
-.fi
-.SH DESCRIPTION
-The
-.BR difftime ()
-function returns the number of seconds elapsed
-between time \fItime1\fP and time \fItime0\fP, represented as a
-.IR double .
-Each time is a count of seconds.
-.P
-.I difftime(b,\~a)
-acts like
-.I (b\-a)
-except that the result does not overflow and is rounded to
-.IR double .
-.SH ATTRIBUTES
-For an explanation of the terms used in this section, see
-.BR attributes (7).
-.TS
-allbox;
-lbx lb lb
-l l l.
-Interface Attribute Value
-T{
-.na
-.nh
-.BR difftime ()
-T} Thread safety MT-Safe
-.TE
-.SH STANDARDS
-C11, POSIX.1-2008.
-.SH HISTORY
-POSIX.1-2001, C89, SVr4, 4.3BSD.
-.SH SEE ALSO
-.BR date (1),
-.BR gettimeofday (2),
-.BR time (2),
-.BR ctime (3),
-.BR gmtime (3),
-.BR localtime (3)