windows-nt-4.0/private/crt32/time/ctime.c

/***
*ctime.c - convert time argument into ASCII string
*
*	Copyright (c) 1985-1991, Microsoft Corporation. All rights reserved.
*
*Purpose:
*	contains ctime() - convert time value to string
*
*Revision History:
*	03-??-84  RLB	initial version
*	05-??-84  DFW	split off into seperate module
*	02-18-87  JCR	put in NULL ptr support
*	04-10-87  JCR	changed long declaration ot time_t and added const.
*	12-11-87  JCR	Added "_LOAD_DS" to declaration
*	03-20-90  GJF	Replaced _LOAD_DS with _CALLTYPE1, added #include
*			<cruntime.h> and fixed the copyright. Also, cleaned
*			up the formatting a bit.
*	05-21-90  GJF	Fixed compiler warning.
*	10-04-90  GJF	New-style function declarators.
*
*******************************************************************************/

#include <cruntime.h>
#include <time.h>
#include <stddef.h>

/***
*char *ctime(time) - converts a time stored as a long to a ASCII string
*
*Purpose:
*	Converts a time stored as a long (time_t) to an ASCII string of
*	the form:
*	       Tue May 1 14:25:03 1984
*
*Entry:
*	long *time - time value in XENIX format
*
*Exit:
*	returns pointer to static string or NULL if time is before
*	Jan 1 1980.
*
*Exceptions:
*
*******************************************************************************/

char * _CALLTYPE1 ctime (
	const time_t *timp
	)
{
	struct tm *tmtemp;

	if ((tmtemp=localtime(timp)) != NULL)
		return(asctime((const struct tm *)tmtemp));
	else
		return(NULL);
}