54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
/***
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*difftime.c - return difference between two times as a double
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*
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* Copyright (c) 1985-2001, Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* Find difference between two time in seconds.
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*
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*Revision History:
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* 12-11-87 JCR Added "_LOAD_DS" to declaration
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* 08-15-89 PHG Made MTHREAD version _pascal
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* 11-20-89 JCR difftime() always _cdecl (not pascal even under
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* mthread)
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* 03-20-90 GJF Replaced _LOAD_DS with CALLTYPE1, added #include
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* <cruntime.h> and fixed the copyright. Also, cleaned
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* up the formatting a bit.
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* 10-04-90 GJF New-style function declarator.
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* 05-19-92 DJM ifndef for POSIX build.
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* 04-06-93 SKS Replace _CRTAPI* with __cdecl
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* 08-30-99 PML Fix function header comment, detab.
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*
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*******************************************************************************/
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#ifndef _POSIX_
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#include <cruntime.h>
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#include <time.h>
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/***
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*double difftime(b, a) - find difference between two times
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*
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*Purpose:
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* returns difference between two times (b-a)
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*
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*Entry:
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* time_t a, b - times to difference
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*
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*Exit:
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* returns a double with the time in seconds between two times
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*
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*Exceptions:
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*
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*******************************************************************************/
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double __cdecl difftime (
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time_t b,
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time_t a
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)
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{
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return( (double)( b - a ) );
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}
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#endif /* _POSIX_ */
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