Fixed bug in day of week processing.

Author: Michael Meskes

src/interfaces/ecpg/ChangeLog

@@ -1665,6 +1665,10 @@ Fri Sep 26 17:14:07 CEST 2003
 Fri Oct  3 12:04:57 CEST 2003
 
 	- Hide Informix datatypes in PostgreSQL built process.
+	
+Sun Oct  5 13:08:47 CEST 2003
+
+	- Fixed bug in day of week calculation.
 	- Set ecpg version to 3.0.0
 	- Set ecpg library to 4.0.0
 	- Set pgtypes library to 1.0.0

src/interfaces/ecpg/pgtypeslib/datetime.c

@@ -123,10 +123,10 @@ int
 PGTYPESdate_dayofweek(date dDate)
 {
 	/*
-	 * Sunday:		0 Monday:	   1 Tuesday:	  2 Wednesday:	 3
+	 * Sunday:	0 Monday:	   1 Tuesday:	  2 Wednesday:	 3
 	 * Thursday:	4 Friday:	   5 Saturday:	  6
 	 */
-	return 6 - j2day(dDate + 3);
+	return (int) (dDate + date2j(2000, 1, 1) + 1) % 7;
 }
 
 void

src/interfaces/ecpg/pgtypeslib/dt.h

@@ -300,8 +300,6 @@ int			tm2timestamp(struct tm *, fsec_t, int *, timestamp *);
 int			DecodeUnits(int field, char *lowtoken, int *val);
 bool		ClearDateCache(bool, bool, bool);
 
-int			j2day(int jd);
-
 bool		CheckDateTokenTables(void);
 
 int			EncodeDateOnly(struct tm *, int, char *, bool);

src/interfaces/ecpg/pgtypeslib/dt_common.c

@@ -637,17 +637,6 @@ j2date(int jd, int *year, int *month, int *day)
 	return;
 }	/* j2date() */
 
-int
-j2day(int date)
-{
-	unsigned int day;
-
-	day = date;
-	day += 1;
-	day %= 7;
-	return (int) day;
-}	/* j2day() */
-
 /* DecodeSpecial()
  * Decode text string using lookup table.
  * Implement a cache lookup since it is likely that dates
@@ -931,7 +920,7 @@ EncodeDateTime(struct tm * tm, fsec_t fsec, int *tzp, char **tzn, int style, cha
 			/* Backward-compatible with traditional Postgres abstime dates */
 
 			day = date2j(tm->tm_year, tm->tm_mon, tm->tm_mday);
-			tm->tm_wday = j2day(day);
+			tm->tm_wday = (int) ((day + date2j(2000, 1, 1) + 1) % 7);
 
 			strncpy(str, days[tm->tm_wday], 3);
 			strcpy((str + 3), " ");

src/interfaces/ecpg/pgtypeslib/timestamp.c

@@ -11,7 +11,6 @@
 #include "dt.h"
 #include "pgtypes_timestamp.h"
 #include "pgtypes_date.h"
-#include "datetime.h"
 
 int PGTYPEStimestamp_defmt_scan(char **, char *, timestamp *, int *, int *, int *,
 							int *, int *, int *, int *);