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Add an upper limit to IS_VALID_JULIAN() to defend against overflow in 

date2j().  This ensures we give reasonable errors instead of bizarre
behavior for input dates far in the future.
This commit is contained in:
Tom Lane 2003-07-17 22:28:42 +00:00
parent 0347d310d7
commit 157e17e20d
2 changed files with 19 additions and 11 deletions
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16
src/include/utils/datetime.h
View File

@ -9,7 +9,7 @@
* Portions Copyright (c) 1996-2002, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $Id: datetime.h,v 1.40 2003/07/17 00:55:37 tgl Exp $
* $Id: datetime.h,v 1.41 2003/07/17 22:28:42 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -237,17 +237,21 @@ extern int day_tab[2][13];
#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
/* Julian date support for date2j() and j2date()
* Set the minimum year to one greater than the year of the first valid day
* to avoid having to check year and day both. - tgl 97/05/08
*
* IS_VALID_JULIAN checks the minimum date exactly, but is a bit sloppy
* about the maximum, since it's far enough out to not be especially
* interesting.
*/
#define JULIAN_MINYEAR (-4713)
#define JULIAN_MINMONTH (11)
#define JULIAN_MINDAY (24)
#define JULIAN_MAXYEAR (5874898)
#define IS_VALID_JULIAN(y,m,d) (((y) > JULIAN_MINYEAR) \
|| (((y) == JULIAN_MINYEAR) && (((m) > JULIAN_MINMONTH) \
|| (((m) == JULIAN_MINMONTH) && ((d) >= JULIAN_MINDAY)))))
#define IS_VALID_JULIAN(y,m,d) ((((y) > JULIAN_MINYEAR) \
|| (((y) == JULIAN_MINYEAR) && (((m) > JULIAN_MINMONTH) \
|| (((m) == JULIAN_MINMONTH) && ((d) >= JULIAN_MINDAY))))) \
&& ((y) < JULIAN_MAXYEAR))
#define UTIME_MINYEAR (1901)
#define UTIME_MINMONTH (12)

14
src/interfaces/ecpg/pgtypeslib/dt.h
View File

@ -232,17 +232,21 @@ extern int day_tab[2][13];
#define isleap(y) (((y) % 4) == 0 && (((y) % 100) != 0 || ((y) % 400) == 0))
/* Julian date support for date2j() and j2date()
* Set the minimum year to one greater than the year of the first valid day
* to avoid having to check year and day both. - tgl 97/05/08
*
* IS_VALID_JULIAN checks the minimum date exactly, but is a bit sloppy
* about the maximum, since it's far enough out to not be especially
* interesting.
*/
#define JULIAN_MINYEAR (-4713)
#define JULIAN_MINMONTH (11)
#define JULIAN_MINDAY (24)
#define JULIAN_MAXYEAR (5874898)
#define IS_VALID_JULIAN(y,m,d) (((y) > JULIAN_MINYEAR) \
|| (((y) == JULIAN_MINYEAR) && (((m) > JULIAN_MINMONTH) \
|| (((m) == JULIAN_MINMONTH) && ((d) >= JULIAN_MINDAY)))))
#define IS_VALID_JULIAN(y,m,d) ((((y) > JULIAN_MINYEAR) \
|| (((y) == JULIAN_MINYEAR) && (((m) > JULIAN_MINMONTH) \
|| (((m) == JULIAN_MINMONTH) && ((d) >= JULIAN_MINDAY))))) \
&& ((y) < JULIAN_MAXYEAR))
#define UTIME_MINYEAR (1901)
#define UTIME_MINMONTH (12)