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Rev 1765 |
/*
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/*
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* difftime.c
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* difftime.c
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* Original Author: G. Haley
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* Original Author: G. Haley
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*/
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*/
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/*
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/*
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FUNCTION
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FUNCTION
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<<difftime>>---subtract two times
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<<difftime>>---subtract two times
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INDEX
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INDEX
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difftime
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difftime
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ANSI_SYNOPSIS
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ANSI_SYNOPSIS
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#include <time.h>
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#include <time.h>
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double difftime(time_t <[tim1]>, time_t <[tim2]>);
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double difftime(time_t <[tim1]>, time_t <[tim2]>);
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TRAD_SYNOPSIS
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TRAD_SYNOPSIS
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#include <time.h>
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#include <time.h>
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double difftime(<[tim1]>, <[tim2]>)
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double difftime(<[tim1]>, <[tim2]>)
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time_t <[tim1]>;
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time_t <[tim1]>;
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time_t <[tim2]>;
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time_t <[tim2]>;
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DESCRIPTION
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DESCRIPTION
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Subtracts the two times in the arguments: `<<<[tim1]> - <[tim2]>>>'.
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Subtracts the two times in the arguments: `<<<[tim1]> - <[tim2]>>>'.
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RETURNS
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RETURNS
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The difference (in seconds) between <[tim2]> and <[tim1]>, as a <<double>>.
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The difference (in seconds) between <[tim2]> and <[tim1]>, as a <<double>>.
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PORTABILITY
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PORTABILITY
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ANSI C requires <<difftime>>, and defines its result to be in seconds
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ANSI C requires <<difftime>>, and defines its result to be in seconds
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in all implementations.
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in all implementations.
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<<difftime>> requires no supporting OS subroutines.
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<<difftime>> requires no supporting OS subroutines.
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*/
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*/
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#include <time.h>
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#include <time.h>
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double
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double
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_DEFUN (difftime, (tim1, tim2),
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_DEFUN (difftime, (tim1, tim2),
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time_t tim1 _AND
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time_t tim1 _AND
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time_t tim2)
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time_t tim2)
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{
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{
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return ((double) tim1 - tim2);
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return ((double) tim1 - tim2);
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}
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}
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