mirror/postgresql
2
0
Fork 0
mirror of https://git.postgresql.org/git/postgresql.git synced 2025-01-18 18:44:06 +08:00
Code Issues Packages Projects Releases Wiki Activity

Apply date patch from tiemann@cygnus.com,Michael Tiemann.

Browse Source
This commit is contained in:
Bruce Momjian 1997-03-02 02:05:33 +00:00
parent 162c2a6e4c
commit 3ce0236c69
1 changed files with 37 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

52
src/backend/utils/adt/datetimes.c
View File

@ -7,7 +7,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/Attic/datetimes.c,v 1.8 1997/01/26 15:31:12 scrappy Exp $ * $Header: /cvsroot/pgsql/src/backend/utils/adt/Attic/datetimes.c,v 1.9 1997/03/02 02:05:33 momjian Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -240,32 +240,54 @@ date_smaller(int4 dateVal1, int4 dateVal2)
int32 int32
date_mi(int4 dateVal1, int4 dateVal2) date_mi(int4 dateVal1, int4 dateVal2)
{ {
int4 dv1, dv2;
DateADT *date1, *date2; DateADT *date1, *date2;
int32 days = 0; int32 days = 0;
int i; int i;
date1 = (DateADT *) &dateVal1; /* This circumlocution allows us to assume that date1 is always
date2 = (DateADT *) &dateVal2; before date2. */
dv1 = date_smaller (dateVal1, dateVal2);
dv2 = date_larger (dateVal1, dateVal2);
date1 = (DateADT *) &dv1;
date2 = (DateADT *) &dv2;
/* Sum number of days in each full year between date1 and date2. */ /* Sum number of days in each full year between date1 and date2. */
for (i = date1->year + 1; i < date2->year; ++i) for (i = date1->year + 1; i < date2->year; ++i)
days += isleap (i) ? 366 : 365; days += isleap (i) ? 366 : 365;
/* Add in number of days in each full month from date1 to end of if (days)
year. */ {
for (i = date1->month + 1; i <= 12; ++i) /* We need to wrap around the year. Add in number of days in each
days += day_tab[isleap (date1->year)][i - 1]; full month from date1 to end of year. */
for (i = date1->month + 1; i <= 12; ++i)
days += day_tab[isleap (date1->year)][i - 1];
/* Add in number of days in each full month from start of year to /* Add in number of days in each full month from start of year to
date2. */ date2. */
for (i = 1; i < date2->month; ++i) for (i = 1; i < date2->month; ++i)
days += day_tab[isleap (date2->year)][i - 1]; days += day_tab[isleap (date2->year)][i - 1];
}
else
{
/* Add in number of days in each full month from date1 to date2. */
for (i = date1->month + 1; i < date2->month; ++i)
days += day_tab[isleap (date1->year)][i - 1];
}
/* Add in number of days left in month for date1. */ if (days || date1->month != date2->month)
days += day_tab[isleap (date1->year)][date1->month - 1] - date1->day; {
/* Add in number of days left in month for date1. */
days += day_tab[isleap (date1->year)][date1->month - 1] - date1->day;
/* Add in day of month of date2. */ /* Add in day of month of date2. */
days += date2->day; days += date2->day;
}
else
{
/* Everything's in the same month, so just subtract the days! */
days = date2->day - date1->day;
}
return (days); return (days);
} }