Change time function names to be more consistent, and check for zero divides,...

Change time function names to be more consistent, and check for zero divides, from Michael Reifenberg.

src/backend/utils/adt/cash.c

@@ -9,7 +9,7 @@
  * workings can be found in the book "Software Solutions in C" by
  * Dale Schumacher, Academic Press, ISBN: 0-12-632360-7.
  * 
- * $Header: /cvsroot/pgsql/src/backend/utils/adt/cash.c,v 1.7 1997/04/28 16:15:13 scrappy Exp $
+ * $Header: /cvsroot/pgsql/src/backend/utils/adt/cash.c,v 1.8 1997/08/21 23:56:37 momjian Exp $
  */
 
 #include <stdio.h>
@@ -371,6 +371,9 @@ cash_div(Cash *c, float8 *f)
     if (!PointerIsValid(result = PALLOCTYPE(Cash)))
         elog(WARN,"Memory allocation failed, can't divide cash",NULL);
 
+    if (*f == 0.0)
+        elog(WARN,"cash_div:  divide by 0.0 error");
+
     *result = rint(*c / *f);
 
     return(result);

src/backend/utils/adt/dt.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *    $Header: /cvsroot/pgsql/src/backend/utils/adt/Attic/dt.c,v 1.32 1997/08/19 21:34:34 momjian Exp $
+ *    $Header: /cvsroot/pgsql/src/backend/utils/adt/Attic/dt.c,v 1.33 1997/08/21 23:56:40 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -645,7 +645,7 @@ datetime_larger(DateTime *datetime1, DateTime *datetime2)
 
 
 TimeSpan *
-datetime_sub(DateTime *datetime1, DateTime *datetime2)
+datetime_mi(DateTime *datetime1, DateTime *datetime2)
 {
     TimeSpan *result;
 
@@ -672,10 +672,10 @@ datetime_sub(DateTime *datetime1, DateTime *datetime2)
     result->month = 0;
 
     return(result);
-} /* datetime_sub() */
+} /* datetime_mi() */
 
 
-/* datetime_add_span()
+/* datetime_pl_span()
  * Add a timespan to a datetime data type.
  * Note that timespan has provisions for qualitative year/month
  *  units, so try to do the right thing with them.
@@ -684,7 +684,7 @@ datetime_sub(DateTime *datetime1, DateTime *datetime2)
  *  to the last day of month.
  */
 DateTime *
-datetime_add_span(DateTime *datetime, TimeSpan *span)
+datetime_pl_span(DateTime *datetime, TimeSpan *span)
 {
     DateTime *result;
     DateTime dt;
@@ -697,7 +697,7 @@ datetime_add_span(DateTime *datetime, TimeSpan *span)
     result = PALLOCTYPE(DateTime);
 
 #ifdef DATEDEBUG
-printf( "datetime_add_span- add %f to %d %f\n", *datetime, span->month, span->time);
+printf( "datetime_pl_span- add %f to %d %f\n", *datetime, span->month, span->time);
 #endif
 
     if (DATETIME_NOT_FINITE(*datetime)) {
@@ -721,7 +721,7 @@ printf( "datetime_add_span- add %f to %d %f\n", *datetime, span->month, span->ti
 
 	    if (datetime2tm( dt, &tz, tm, &fsec, &tzn) == 0) {
 #ifdef DATEDEBUG
-printf( "datetime_add_span- date was %04d-%02d-%02d %02d:%02d:%02d\n",
+printf( "datetime_pl_span- date was %04d-%02d-%02d %02d:%02d:%02d\n",
  tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
 #endif
 		tm->tm_mon += span->month;
@@ -743,7 +743,7 @@ printf( "datetime_add_span- date was %04d-%02d-%02d %02d:%02d:%02d\n",
 		};
 
 #ifdef DATEDEBUG
-printf( "datetime_add_span- date becomes %04d-%02d-%02d %02d:%02d:%02d\n",
+printf( "datetime_pl_span- date becomes %04d-%02d-%02d %02d:%02d:%02d\n",
  tm->tm_year, tm->tm_mon, tm->tm_mday, tm->tm_hour, tm->tm_min, tm->tm_sec);
 #endif
 		if (tm2datetime( tm, fsec, &tz, &dt) != 0)
@@ -758,10 +758,10 @@ printf( "datetime_add_span- date becomes %04d-%02d-%02d %02d:%02d:%02d\n",
     };
 
     return(result);
-} /* datetime_add_span() */
+} /* datetime_pl_span() */
 
 DateTime *
-datetime_sub_span(DateTime *datetime, TimeSpan *span)
+datetime_mi_span(DateTime *datetime, TimeSpan *span)
 {
     DateTime *result;
     TimeSpan tspan;
@@ -772,10 +772,10 @@ datetime_sub_span(DateTime *datetime, TimeSpan *span)
     tspan.month = -span->month;
     tspan.time = -span->time;
 
-    result = datetime_add_span( datetime, &tspan);
+    result = datetime_pl_span( datetime, &tspan);
 
     return(result);
-} /* datetime_sub_span() */
+} /* datetime_mi_span() */
 
 
 TimeSpan *
@@ -885,7 +885,7 @@ printf( "timespan_larger- months %d %d times %f %f spans %f %f\n",
 
 
 TimeSpan *
-timespan_add(TimeSpan *span1, TimeSpan *span2)
+timespan_pl(TimeSpan *span1, TimeSpan *span2)
 {
     TimeSpan *result;
 
@@ -898,10 +898,10 @@ timespan_add(TimeSpan *span1, TimeSpan *span2)
     result->time = JROUND(span1->time + span2->time);
 
     return(result);
-} /* timespan_add() */
+} /* timespan_pl() */
 
 TimeSpan *
-timespan_sub(TimeSpan *span1, TimeSpan *span2)
+timespan_mi(TimeSpan *span1, TimeSpan *span2)
 {
     TimeSpan *result;
 
@@ -914,8 +914,27 @@ timespan_sub(TimeSpan *span1, TimeSpan *span2)
     result->time = JROUND(span1->time - span2->time);
 
     return(result);
-} /* timespan_sub() */
+} /* timespan_mi() */
 
+TimeSpan *
+timespan_div(TimeSpan *span1, float8 *arg2)
+{
+    TimeSpan *result;
+
+    if ((!PointerIsValid(span1)) || (!PointerIsValid(arg2)))
+        return NULL;
+
+    if (!PointerIsValid(result = PALLOCTYPE(TimeSpan)))
+        elog(WARN,"Memory allocation failed, can't subtract timespans",NULL);
+
+    if (*arg2 == 0.0)
+        elog(WARN,"timespan_div:  divide by 0.0 error");
+
+    result->month = rint(span1->month / *arg2);
+    result->time = JROUND(span1->time / *arg2);
+
+    return(result);
+} /* timespan_div() */
 
 /* datetime_age()
  * Calculate time difference while retaining year/month fields.

src/backend/utils/adt/geo_ops.c

@@ -7,7 +7,7 @@
  *
  *
  * IDENTIFICATION
- *    $Header: /cvsroot/pgsql/src/backend/utils/adt/geo_ops.c,v 1.15 1997/08/19 21:34:39 momjian Exp $
+ *    $Header: /cvsroot/pgsql/src/backend/utils/adt/geo_ops.c,v 1.16 1997/08/21 23:56:41 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -2555,6 +2555,9 @@ point_div(Point *p1, Point *p2)
 
     div = (p2->x*p2->x) + (p2->y*p2->y);
 
+    if (div == 0.0)
+        elog(WARN,"point_div:  divide by 0.0 error");
+
     result->x = ((p1->x*p2->x) + (p1->y*p2->y)) / div;
     result->y = ((p2->x*p1->y) - (p2->y*p1->x)) / div;
 

src/include/catalog/pg_aggregate.h

@@ -7,7 +7,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: pg_aggregate.h,v 1.7 1997/04/27 19:22:36 thomas Exp $
+ * $Id: pg_aggregate.h,v 1.8 1997/08/21 23:56:45 momjian Exp $
  *
  * NOTES
  *    the genbki.sh script reads this file and generates .bki
@@ -92,12 +92,14 @@ DATA(insert OID = 0 ( avg   PGUID int2pl   int2inc   int2div     21   21   21
 DATA(insert OID = 0 ( avg   PGUID float4pl float4inc float4div  700  700  700  700 _null_ 0.0 ));
 DATA(insert OID = 0 ( avg   PGUID float8pl float8inc float8div  701  701  701  701 _null_ 0.0 ));
 DATA(insert OID = 0 ( avg   PGUID cash_pl  float8inc cash_div   790  790  701  790 _null_ 0.0 ));
+DATA(insert OID = 0 ( avg   PGUID timespan_pl  float8inc timespan_div   1186  1186  701  1186 _null_ 0.0 ));
 
 DATA(insert OID = 0 ( sum   PGUID int4pl        - -   23   23 0   23 _null_ _null_ ));
 DATA(insert OID = 0 ( sum   PGUID int2pl        - -   21   21 0   21 _null_ _null_ ));
 DATA(insert OID = 0 ( sum   PGUID float4pl      - -  700  700 0  700 _null_ _null_ ));
 DATA(insert OID = 0 ( sum   PGUID float8pl      - -  701  701 0  701 _null_ _null_ ));
 DATA(insert OID = 0 ( sum   PGUID cash_pl       - -  790  790 0  790 _null_ _null_ ));
+DATA(insert OID = 0 ( sum   PGUID timespan_pl   - -  1186 1186 0 1186 _null_ _null_ ));
 
 DATA(insert OID = 0 ( max   PGUID int4larger      - -   23   23 0   23 _null_ _null_ ));
 DATA(insert OID = 0 ( max   PGUID int2larger      - -   21   21 0   21 _null_ _null_ ));

src/include/catalog/pg_operator.h

@@ -7,7 +7,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: pg_operator.h,v 1.12 1997/07/29 16:17:50 thomas Exp $
+ * $Id: pg_operator.h,v 1.13 1997/08/21 23:56:48 momjian Exp $
  *
  * NOTES
  *    the genbki.sh script reads this file and generates .bki
@@ -487,9 +487,9 @@ DATA(insert OID = 1323 (  "<="     PGUID 0 b t f 1184 1184   16 1324 1324 0 0 da
 DATA(insert OID = 1324 (  ">"      PGUID 0 b t f 1184 1184   16 1323 1323 0 0 datetime_gt intltsel intltjoinsel ));
 DATA(insert OID = 1325 (  ">="     PGUID 0 b t f 1184 1184   16 1322 1322 0 0 datetime_ge intltsel intltjoinsel ));
 
-DATA(insert OID = 1327 (  "+"      PGUID 0 b t f 1184 1186 1184 1327    0 0 0 datetime_add_span - - ));
-DATA(insert OID = 1328 (  "-"      PGUID 0 b t f 1184 1184 1186    0    0 0 0 datetime_sub - - ));
-DATA(insert OID = 1329 (  "-"      PGUID 0 b t f 1184 1186 1184    0    0 0 0 datetime_sub_span - - ));
+DATA(insert OID = 1327 (  "+"      PGUID 0 b t f 1184 1186 1184 1327    0 0 0 datetime_pl_span - - ));
+DATA(insert OID = 1328 (  "-"      PGUID 0 b t f 1184 1184 1186    0    0 0 0 datetime_mi - - ));
+DATA(insert OID = 1329 (  "-"      PGUID 0 b t f 1184 1186 1184    0    0 0 0 datetime_mi_span - - ));
 
 /* timespan operators */
 DATA(insert OID = 1330 (  "="      PGUID 0 b t f 1186 1186   16 1330 1331 1332 1332 timespan_eq eqsel eqjoinsel ));
@@ -500,8 +500,8 @@ DATA(insert OID = 1334 (  ">"      PGUID 0 b t f 1186 1186   16 1333 1333 0 0 ti
 DATA(insert OID = 1335 (  ">="     PGUID 0 b t f 1186 1186   16 1332 1332 0 0 timespan_ge intltsel intltjoinsel ));
 
 DATA(insert OID = 1336 (  "-"      PGUID 0 l t f    0 1186 1186    0    0 0 0 timespan_um 0 0 ));
-DATA(insert OID = 1337 (  "+"      PGUID 0 b t f 1186 1186 1186 1337    0 0 0 timespan_add - - ));
-DATA(insert OID = 1338 (  "-"      PGUID 0 b t f 1186 1186 1186    0    0 0 0 timespan_sub - - ));
+DATA(insert OID = 1337 (  "+"      PGUID 0 b t f 1186 1186 1186 1337    0 0 0 timespan_pl - - ));
+DATA(insert OID = 1338 (  "-"      PGUID 0 b t f 1186 1186 1186    0    0 0 0 timespan_mi - - ));
 
 /* float48 operators */
 DATA(insert OID = 1116 (  "+"       PGUID 0 b t f 700 701 701 1116   0   0   0 float48pl - - ));
@@ -628,6 +628,7 @@ DATA(insert OID = 1559 (  "##"    PGUID 0 b t f  600  603  600    0  0 0 0 close
 DATA(insert OID = 1566 (  "##"    PGUID 0 b t f  601  628  600    0  0 0 0 close_sl - - ));
 DATA(insert OID = 1567 (  "##"    PGUID 0 b t f  601  603  600    0  0 0 0 close_sb - - ));
 DATA(insert OID = 1568 (  "##"    PGUID 0 b t f  628  603  600    0  0 0 0 close_lb - - ));
+DATA(insert OID = 1585 (  "/"     PGUID 0 b t f 1186 1186 1186    0  0 0 0 timespan_div - - ));
 
 /*
  * function prototypes

src/include/catalog/pg_proc.h

@@ -6,7 +6,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: pg_proc.h,v 1.24 1997/07/29 16:17:52 thomas Exp $
+ * $Id: pg_proc.h,v 1.25 1997/08/21 23:56:51 momjian Exp $
  *
  * NOTES
  *    The script catalog/genbki.sh reads this file and generates .bki
@@ -828,8 +828,8 @@ DATA(insert OID = 1165 (  timespan_le      PGUID 11 f t f 2 f 16 "1186 1186" 100
 DATA(insert OID = 1166 (  timespan_ge      PGUID 11 f t f 2 f 16 "1186 1186" 100 0 0 100  foo bar ));
 DATA(insert OID = 1167 (  timespan_gt      PGUID 11 f t f 2 f 16 "1186 1186" 100 0 0 100  foo bar ));
 DATA(insert OID = 1168 (  timespan_um      PGUID 11 f t f 1 f 1186 "1186" 100 0 0 100  foo bar ));
-DATA(insert OID = 1169 (  timespan_add     PGUID 11 f t f 2 f 1186 "1186 1186" 100 0 0 100  foo bar ));
-DATA(insert OID = 1170 (  timespan_sub     PGUID 11 f t f 2 f 1186 "1186 1186" 100 0 0 100  foo bar ));
+DATA(insert OID = 1169 (  timespan_pl     PGUID 11 f t f 2 f 1186 "1186 1186" 100 0 0 100  foo bar ));
+DATA(insert OID = 1170 (  timespan_mi     PGUID 11 f t f 2 f 1186 "1186 1186" 100 0 0 100  foo bar ));
 DATA(insert OID = 1171 (  datetime_part    PGUID 11 f t f 2 f  701 "25 1184" 100 0 0 100  foo bar ));
 DATA(insert OID = 1172 (  timespan_part    PGUID 11 f t f 2 f  701 "25 1186" 100 0 0 100  foo bar ));
 
@@ -842,9 +842,9 @@ DATA(insert OID = 1178 (  datetime_date      PGUID 11 f t f 1 f 1082 "1184" 100
 DATA(insert OID = 1179 (  abstime_date       PGUID 11 f t f 1 f 1082  "702" 100 0 0 100  foo bar ));
 DATA(insert OID = 1180 (  datetime_abstime   PGUID 11 f t f 1 f  702 "1184" 100 0 0 100  foo bar ));
 
-DATA(insert OID = 1188 (  datetime_sub       PGUID 11 f t f 2 f 1186 "1184 1184" 100 0 0 100  foo bar ));
-DATA(insert OID = 1189 (  datetime_add_span  PGUID 11 f t f 2 f 1184 "1184 1186" 100 0 0 100  foo bar ));
-DATA(insert OID = 1190 (  datetime_sub_span  PGUID 11 f t f 2 f 1184 "1184 1186" 100 0 0 100  foo bar ));
+DATA(insert OID = 1188 (  datetime_mi       PGUID 11 f t f 2 f 1186 "1184 1184" 100 0 0 100  foo bar ));
+DATA(insert OID = 1189 (  datetime_pl_span  PGUID 11 f t f 2 f 1184 "1184 1186" 100 0 0 100  foo bar ));
+DATA(insert OID = 1190 (  datetime_mi_span  PGUID 11 f t f 2 f 1184 "1184 1186" 100 0 0 100  foo bar ));
 DATA(insert OID = 1191 (  text_datetime      PGUID 11 f t f 1 f 1184 "25" 100 0 0 100  foo bar ));
 DATA(insert OID = 1192 (  datetime_text      PGUID 11 f t f 1 f   25 "1184" 100 0 0 100  foo bar ));
 DATA(insert OID = 1193 (  timespan_text      PGUID 11 f t f 1 f 1186 "25" 100 0 0 100  foo bar ));
@@ -1088,6 +1088,8 @@ DATA(insert OID =  882 (  rtrim        PGUID 14 f t f 1 f 25 "25" 100 0 0 100  "
 DATA(insert OID =  883 (  substr       PGUID 14 f t f 2 f 25 "25 23" 100 0 0 100  "select substr($1, $2, 10000)" - ));
 DATA(insert OID =  884 (  btrim        PGUID 11 f t f 2 f 25 "25 25" 100 0 0 100  foo bar ));
 DATA(insert OID =  885 (  btrim        PGUID 14 f t f 1 f 25 "25" 100 0 0 100  "select btrim($1, \' \')" - ));
+/* XXX Help, where should I go to  */
+DATA(insert OID =  1586 (  timespan_div PGUID 11 f t f 2 f 1186 "1186 701" 100 0 0 100  foo bar ));
 
 /* SEQUENCEs nextval & currval functions */
 DATA(insert OID =  1317 (  nextval     PGUID 11 f t f 1 f 23 "25" 100 0 0 100  foo bar ));

src/include/utils/dt.h

@@ -8,7 +8,7 @@
  *
  * Copyright (c) 1994, Regents of the University of California
  *
- * $Id: dt.h,v 1.16 1997/08/19 21:40:30 momjian Exp $
+ * $Id: dt.h,v 1.17 1997/08/21 23:57:00 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -283,12 +283,13 @@ extern float64 timespan_part(text *units, TimeSpan *timespan);
 extern text *datetime_zone(text *zone, DateTime *datetime);
 
 extern TimeSpan *timespan_um(TimeSpan *span);
-extern TimeSpan *timespan_add(TimeSpan *span1, TimeSpan *span2);
-extern TimeSpan *timespan_sub(TimeSpan *span1, TimeSpan *span2);
+extern TimeSpan *timespan_pl(TimeSpan *span1, TimeSpan *span2);
+extern TimeSpan *timespan_mi(TimeSpan *span1, TimeSpan *span2);
+extern TimeSpan *timespan_div(TimeSpan *span1, float8 *arg2);
 
-extern TimeSpan *datetime_sub(DateTime *dt1, DateTime *dt2);
-extern DateTime *datetime_add_span(DateTime *dt, TimeSpan *span);
-extern DateTime *datetime_sub_span(DateTime *dt, TimeSpan *span);
+extern TimeSpan *datetime_mi(DateTime *dt1, DateTime *dt2);
+extern DateTime *datetime_pl_span(DateTime *dt, TimeSpan *span);
+extern DateTime *datetime_mi_span(DateTime *dt, TimeSpan *span);
 extern TimeSpan *datetime_age(DateTime *dt1, DateTime *dt2);
 
 extern void GetCurrentTime(struct tm *tm);