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#include "TimeUtils.h"
#include <stdio.h>
#include <cutils/tztime.h>
namespace android {
static void
dump(const Time& t)
{
#ifdef HAVE_TM_GMTOFF
long tm_gmtoff = t.t.tm_gmtoff;
#else
long tm_gmtoff = 0;
#endif
printf("%04d-%02d-%02d %02d:%02d:%02d (%d,%ld,%d,%d)\n",
t.t.tm_year+1900, t.t.tm_mon+1, t.t.tm_mday,
t.t.tm_hour, t.t.tm_min, t.t.tm_sec,
t.t.tm_isdst, tm_gmtoff, t.t.tm_wday, t.t.tm_yday);
}
Time::Time()
{
t.tm_sec = 0;
t.tm_min = 0;
t.tm_hour = 0;
t.tm_mday = 0;
t.tm_mon = 0;
t.tm_year = 0;
t.tm_wday = 0;
t.tm_yday = 0;
t.tm_isdst = -1; // we don't know, so let the C library determine
#ifdef HAVE_TM_GMTOFF
t.tm_gmtoff = 0;
#endif
}
#define COMPARE_FIELD(field) do { \
int diff = a.t.field - b.t.field; \
if (diff != 0) return diff; \
} while(0)
int
Time::compare(Time& a, Time& b)
{
if (0 == strcmp(a.timezone, b.timezone)) {
// if the timezones are the same, we can easily compare the two
// times. Otherwise, convert to milliseconds and compare that.
// This requires that object be normalized.
COMPARE_FIELD(tm_year);
COMPARE_FIELD(tm_mon);
COMPARE_FIELD(tm_mday);
COMPARE_FIELD(tm_hour);
COMPARE_FIELD(tm_min);
COMPARE_FIELD(tm_sec);
return 0;
} else {
int64_t am = a.toMillis(false /* use isDst */);
int64_t bm = b.toMillis(false /* use isDst */);
int64_t diff = am-bm;
return (diff < 0) ? -1 : ((diff > 0) ? 1 : 0);
}
}
static const int DAYS_PER_MONTH[] = {
31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31
};
static inline int days_this_month(int year, int month)
{
int n = DAYS_PER_MONTH[month];
if (n != 28) {
return n;
} else {
int y = year;
return ((y%4)==0&&((y%100)!=0||(y%400)==0)) ? 29 : 28;
}
}
void
Time::switchTimezone(const char* timezone)
{
time_t seconds = mktime_tz(&(this->t), this->timezone);
localtime_tz(&seconds, &(this->t), timezone);
}
String8
Time::format(const char *format, const struct strftime_locale *locale) const
{
char buf[257];
int n = strftime_tz(buf, 257, format, &(this->t), locale);
if (n > 0) {
return String8(buf);
} else {
return String8();
}
}
static inline short
tochar(int n)
{
return (n >= 0 && n <= 9) ? ('0'+n) : ' ';
}
static inline short
next_char(int *m, int k)
{
int n = *m / k;
*m = *m % k;
return tochar(n);
}
void
Time::format2445(short* buf, bool hasTime) const
{
int n;
n = t.tm_year+1900;
buf[0] = next_char(&n, 1000);
buf[1] = next_char(&n, 100);
buf[2] = next_char(&n, 10);
buf[3] = tochar(n);
n = t.tm_mon+1;
buf[4] = next_char(&n, 10);
buf[5] = tochar(n);
n = t.tm_mday;
buf[6] = next_char(&n, 10);
buf[7] = tochar(n);
if (hasTime) {
buf[8] = 'T';
n = t.tm_hour;
buf[9] = next_char(&n, 10);
buf[10] = tochar(n);
n = t.tm_min;
buf[11] = next_char(&n, 10);
buf[12] = tochar(n);
n = t.tm_sec;
buf[13] = next_char(&n, 10);
buf[14] = tochar(n);
bool inUtc = strcmp("UTC", timezone) == 0;
if (inUtc) {
buf[15] = 'Z';
}
}
}
String8
Time::toString() const
{
String8 str;
char* s = str.lockBuffer(150);
#ifdef HAVE_TM_GMTOFF
long tm_gmtoff = t.tm_gmtoff;
#else
long tm_gmtoff = 0;
#endif
sprintf(s, "%04d%02d%02dT%02d%02d%02d%s(%d,%d,%ld,%d,%d)",
t.tm_year+1900, t.tm_mon+1, t.tm_mday, t.tm_hour, t.tm_min,
t.tm_sec, timezone, t.tm_wday, t.tm_yday, tm_gmtoff, t.tm_isdst,
(int)(((Time*)this)->toMillis(false /* use isDst */)/1000));
str.unlockBuffer();
return str;
}
void
Time::setToNow()
{
time_t seconds;
time(&seconds);
localtime_tz(&seconds, &(this->t), this->timezone);
}
int64_t
Time::toMillis(bool ignoreDst)
{
if (ignoreDst) {
this->t.tm_isdst = -1;
}
int64_t r = mktime_tz(&(this->t), this->timezone);
if (r == -1)
return -1;
return r * 1000;
}
void
Time::set(int64_t millis)
{
time_t seconds = millis / 1000;
localtime_tz(&seconds, &(this->t), this->timezone);
}
}; // namespace android
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