mirror of
https://github.com/cc65/cc65.git
synced 2024-12-27 15:29:46 +00:00
76 lines
3.5 KiB
C
76 lines
3.5 KiB
C
/*****************************************************************************/
|
|
/* */
|
|
/* localtime.c */
|
|
/* */
|
|
/* Convert calendar time into broken down local time */
|
|
/* */
|
|
/* */
|
|
/* */
|
|
/* (C) 2002 Ullrich von Bassewitz */
|
|
/* Wacholderweg 14 */
|
|
/* D-70597 Stuttgart */
|
|
/* EMail: uz@musoftware.de */
|
|
/* */
|
|
/* */
|
|
/* This software is provided 'as-is', without any expressed or implied */
|
|
/* warranty. In no event will the authors be held liable for any damages */
|
|
/* arising from the use of this software. */
|
|
/* */
|
|
/* Permission is granted to anyone to use this software for any purpose, */
|
|
/* including commercial applications, and to alter it and redistribute it */
|
|
/* freely, subject to the following restrictions: */
|
|
/* */
|
|
/* 1. The origin of this software must not be misrepresented; you must not */
|
|
/* claim that you wrote the original software. If you use this software */
|
|
/* in a product, an acknowledgment in the product documentation would be */
|
|
/* appreciated but is not required. */
|
|
/* 2. Altered source versions must be plainly marked as such, and must not */
|
|
/* be misrepresented as being the original software. */
|
|
/* 3. This notice may not be removed or altered from any source */
|
|
/* distribution. */
|
|
/* */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
#include <time.h>
|
|
|
|
|
|
|
|
/*****************************************************************************/
|
|
/* Code */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
struct tm* __fastcall__ localtime (const time_t* timep)
|
|
{
|
|
static struct tm timebuf;
|
|
time_t t;
|
|
|
|
/* Check the argument */
|
|
if (timep == 0 || (long) (t = *timep) < 0) {
|
|
/* Invalid arg */
|
|
return 0;
|
|
}
|
|
|
|
/* Since our ints are just 16 bits, split the given time into seconds,
|
|
* hours and days. Each of the values will fit in a 16 bit variable.
|
|
* The mktime routine will then do the rest.
|
|
*/
|
|
timebuf.tm_sec = t % 3600;
|
|
timebuf.tm_min = 0;
|
|
timebuf.tm_hour = (t / 3600) % 24;
|
|
timebuf.tm_mday = (t / (3600UL * 24UL)) + 1;
|
|
timebuf.tm_mon = 0;
|
|
timebuf.tm_year = 70; /* Base value is 1/1/1970 */
|
|
|
|
/* Call mktime to do the final conversion */
|
|
mktime (&timebuf);
|
|
|
|
/* Return the result */
|
|
return &timebuf;
|
|
}
|
|
|
|
|