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Patch wheredate.diff from Nirgal

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Nirgal Vourgre
2011-08-28 19:47:18 -04:00
committed by Brian Bruns
parent 230dfc8b2b
commit fba597765d
3 changed files with 75 additions and 24 deletions
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49
src/libmdb/data.c
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@@ -779,56 +779,63 @@ static int trim_trailing_zeros(char * buff)
/* Date/Time is stored as a double, where the whole
part is the days from 12/30/1899 and the fractional
part is the fractional part of one day. */
static char *
mdb_date_to_string(MdbHandle *mdb, int start)
void
mdb_date_to_tm(double td, struct tm *t)
{
struct tm t;
long int day, time;
int yr, q;
int *cal;
int noleap_cal[] = {0,31,59,90,120,151,181,212,243,273,304,334,365};
int leap_cal[] = {0,31,60,91,121,152,182,213,244,274,305,335,366};
char *text = (char *) g_malloc(MDB_BIND_SIZE);
double td = mdb_get_double(mdb->pg_buf, start);
day = (long int)(td);
time = (long int)(fabs(td - day) * 86400.0 + 0.5);
t.tm_hour = time / 3600;
t.tm_min = (time / 60) % 60;
t.tm_sec = time % 60;
t.tm_year = 1 - 1900;
t->tm_hour = time / 3600;
t->tm_min = (time / 60) % 60;
t->tm_sec = time % 60;
t->tm_year = 1 - 1900;
day += 693593; /* Days from 1/1/1 to 12/31/1899 */
t.tm_wday = (day+1) % 7;
t->tm_wday = (day+1) % 7;
q = day / 146097; /* 146097 days in 400 years */
t.tm_year += 400 * q;
t->tm_year += 400 * q;
day -= q * 146097;
q = day / 36524; /* 36524 days in 100 years */
if (q > 3) q = 3;
t.tm_year += 100 * q;
t->tm_year += 100 * q;
day -= q * 36524;
q = day / 1461; /* 1461 days in 4 years */
t.tm_year += 4 * q;
t->tm_year += 4 * q;
day -= q * 1461;
q = day / 365; /* 365 days in 1 year */
if (q > 3) q = 3;
t.tm_year += q;
t->tm_year += q;
day -= q * 365;
yr = t.tm_year + 1900;
yr = t->tm_year + 1900;
cal = ((yr)%4==0 && ((yr)%100!=0 || (yr)%400==0)) ?
leap_cal : noleap_cal;
for (t.tm_mon=0; t.tm_mon<12; t.tm_mon++) {
if (day < cal[t.tm_mon+1]) break;
for (t->tm_mon=0; t->tm_mon<12; t->tm_mon++) {
if (day < cal[t->tm_mon+1]) break;
}
t.tm_mday = day - cal[t.tm_mon] + 1;
t.tm_yday = day;
t.tm_isdst = -1;
t->tm_mday = day - cal[t->tm_mon] + 1;
t->tm_yday = day;
t->tm_isdst = -1;
}
static char *
mdb_date_to_string(MdbHandle *mdb, int start)
{
struct tm t;
char *text = (char *) g_malloc(MDB_BIND_SIZE);
double td = mdb_get_double(mdb->pg_buf, start);
mdb_date_to_tm(td, &t);
strftime(text, MDB_BIND_SIZE, date_fmt, &t);