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Added lots of functions from time.h

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git-svn-id: svn://svn.cc65.org/cc65/trunk@1507 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz
2002-11-12 22:06:02 +00:00
parent cae19c1a8a
commit 43d8ecd567
8 changed files with 469 additions and 0 deletions
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69
libsrc/common/localtime.c Normal file
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/*****************************************************************************/
/* */
/* 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>
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;
}