54 lines
1.0 KiB
C
54 lines
1.0 KiB
C
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/*
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FUNCTION
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<<time>>---get current calendar time (as single number)
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INDEX
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time
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ANSI_SYNOPSIS
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#include <time.h>
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time_t time(time_t *<[t]>);
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TRAD_SYNOPSIS
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#include <time.h>
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time_t time(<[t]>)
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time_t *<[t]>;
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DESCRIPTION
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<<time>> looks up the best available representation of the current
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time and returns it, encoded as a <<time_t>>. It stores the same
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value at <[t]> unless the argument is <<NULL>>.
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RETURNS
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A <<-1>> result means the current time is not available; otherwise the
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result represents the current time.
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PORTABILITY
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ANSI C requires <<time>>.
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Supporting OS subroutine required: Some implementations require
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<<gettimeofday>>.
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*/
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/* Most times we have a system call in newlib/libc/sys/.. to do this job */
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#include <_ansi.h>
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#include <reent.h>
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#include <sys/types.h>
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#include <sys/time.h>
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time_t
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_DEFUN (time, (t),
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time_t * t)
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{
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struct timeval now;
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if (_gettimeofday_r (_REENT, &now, NULL) >= 0)
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{
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if (t)
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*t = now.tv_sec;
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return now.tv_sec;
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}
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return -1;
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}
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