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Replace float8 with int in date2isoweek() and date2isoyear().

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The values of the "result" variables in these functions are
always integers; using a float8 variable accomplishes nothing
except to incur useless conversions to and from float.  While
that wastes a few nanoseconds, these functions aren't all that
time-critical.  But it seems worth fixing to remove possible
reader confusion.

Also, in the case of date2isoyear(), "result" is a very poorly
chosen variable name because it is *not* the function's result.
Rename it to "week", and do the same in date2isoweek() for
consistency.

Since this is mostly cosmetic, there seems little need
for back-patch.

Author: Sergey Fukanchik <s.fukanchik@postgrespro.ru>
Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Discussion: https://postgr.es/m/6323a-68726500-1-7def9d00@137821581
This commit is contained in:
Tom Lane
2025-07-12 11:50:35 -04:00
parent f2c87ac04e
commit 84ce258707
1 changed files with 10 additions and 10 deletions
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20
src/backend/utils/adt/timestamp.c
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@@ -5312,10 +5312,10 @@ isoweekdate2date(int isoweek, int wday, int *year, int *mon, int *mday)
int
date2isoweek(int year, int mon, int mday)
{
float8 result;
int day0,
day4,
dayn;
dayn,
week;
/* current day */
dayn = date2j(year, mon, mday);
@@ -5338,13 +5338,13 @@ date2isoweek(int year, int mon, int mday)
day0 = j2day(day4 - 1);
}
result = (dayn - (day4 - day0)) / 7 + 1;
week = (dayn - (day4 - day0)) / 7 + 1;
/*
* Sometimes the last few days in a year will fall into the first week of
* the next year, so check for this.
*/
if (result >= 52)
if (week >= 52)
{
day4 = date2j(year + 1, 1, 4);
@@ -5352,10 +5352,10 @@ date2isoweek(int year, int mon, int mday)
day0 = j2day(day4 - 1);
if (dayn >= day4 - day0)
result = (dayn - (day4 - day0)) / 7 + 1;
week = (dayn - (day4 - day0)) / 7 + 1;
}
return (int) result;
return week;
}
@@ -5367,10 +5367,10 @@ date2isoweek(int year, int mon, int mday)
int
date2isoyear(int year, int mon, int mday)
{
float8 result;
int day0,
day4,
dayn;
dayn,
week;
/* current day */
dayn = date2j(year, mon, mday);
@@ -5395,13 +5395,13 @@ date2isoyear(int year, int mon, int mday)
year--;
}
result = (dayn - (day4 - day0)) / 7 + 1;
week = (dayn - (day4 - day0)) / 7 + 1;
/*
* Sometimes the last few days in a year will fall into the first week of
* the next year, so check for this.
*/
if (result >= 52)
if (week >= 52)
{
day4 = date2j(year + 1, 1, 4);