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/*
** Copyright 2001 Double Precision, Inc. See COPYING for
** distribution information.
*/
#include "config.h"
#include "pcp.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
#include <fcntl.h>
#include <errno.h>
#include "pcp.h"
#define leap(y) ( \
((y) % 400) == 0 || \
(((y) % 4) == 0 && (y) % 100) )
static unsigned mlength[]={31,28,31,30,31,30,31,31,30,31,30,31};
#define mdays(m,y) ( (m) != 2 ? mlength[(m)-1] : leap(y) ? 29:28)
static int tmcmp(int y1, int m1, int d1,
int y2, int m2, int d2)
{
if (y1 < y2)
return (-1);
if (y1 > y2)
return (1);
if (m1 < m2)
return (-1);
if (m1 > m2)
return (1);
if (d1 < d2)
return (-1);
if (d1 > d2)
return (1);
return (0);
}
time_t pcp_gmtime(int y, int m, int d, int hh, int mm, int ss)
{
time_t t;
struct tm *tmptr;
struct tm mytm;
int n;
if (y < 1970 || y > 3000 || m < 1 || m > 12 || d < 1 ||
d > mdays(m, y) || hh < 0 || mm < 0 || ss < 0 || hh > 23 ||
mm > 59 || ss > 59)
return (0);
time(&t);
tmptr=localtime(&t);
if (!tmptr)
return (0);
mytm= *tmptr;
mytm.tm_year = y - 1900;
mytm.tm_mon = m - 1;
mytm.tm_mday = d;
mytm.tm_hour=0;
mytm.tm_min=0;
mytm.tm_sec=0;
t=mktime(&mytm);
if (t == (time_t)-1)
return (0);
/* Do it again, due to a potential timezone change */
tmptr=localtime(&t);
mytm= *tmptr;
mytm.tm_year = y - 1900;
mytm.tm_mon = m - 1;
mytm.tm_mday = d;
mytm.tm_hour=0;
mytm.tm_min=0;
mytm.tm_sec=0;
t=mktime(&mytm);
if (t == (time_t)-1)
return (0);
/* Sanity check */
tmptr=localtime(&t);
if (tmptr->tm_hour || tmptr->tm_min || tmptr->tm_sec)
{
return (0);
}
tmptr=gmtime(&t);
n=tmcmp(tmptr->tm_year + 1900,
tmptr->tm_mon + 1,
tmptr->tm_mday,
y, m, d);
if (n < 0)
{
while (n < 0)
{
t += 24 * 60 * 60;
tmptr=gmtime(&t);
n=tmcmp(tmptr->tm_year + 1900,
tmptr->tm_mon + 1,
tmptr->tm_mday,
y, m, d);
}
}
else while (n > 0)
{
t -= 24 * 60 * 60;
tmptr=gmtime(&t);
n=tmcmp(tmptr->tm_year + 1900,
tmptr->tm_mon + 1,
tmptr->tm_mday,
y, m, d);
}
t -= tmptr->tm_hour * 60 * 60 + tmptr->tm_min * 60 + tmptr->tm_sec;
return (t + hh * 60 * 60 + mm * 60 + ss);
}
time_t pcp_gmtime_s(const char *p)
{
int y, m, d, hh, mm, ss;
if (sscanf(p, "%4d%2d%2d%2d%2d%2d", &y, &m, &d, &hh, &mm, &ss)
!= 6)
return (0);
return (pcp_gmtime(y, m, d, hh, mm, ss));
}
void pcp_gmtimestr(time_t t, char *buf)
{
struct tm *tmptr=gmtime(&t);
sprintf(buf, "%04d%02d%02d%02d%02d%02d",
tmptr->tm_year + 1900,
tmptr->tm_mon+1,
tmptr->tm_mday,
tmptr->tm_hour,
tmptr->tm_min,
tmptr->tm_sec);
}
