database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-30 21:42:05 +03:00
Code Activity

Improve EncodeDateTime and EncodeTimeOnly APIs

Browse Source 
Use an explicit argument to tell whether to include the time zone in
the output, rather than using some undocumented pointer magic.
This commit is contained in:
Peter Eisentraut
2012-03-14 23:03:34 +02:00
parent 942b63193c
commit ad4fb0d0d2
9 changed files with 84 additions and 71 deletions
Download Patch File Download Diff File Expand all files Collapse all files

65
src/backend/utils/adt/datetime.c
View File

@ -3679,39 +3679,54 @@ EncodeDateOnly(struct pg_tm * tm, int style, char *str)
/* EncodeTimeOnly()
* Encode time fields only.
*
* tm and fsec are the value to encode, print_tz determines whether to include
* a time zone (the difference between time and timetz types), tz is the
* numeric time zone offset, style is the date style, str is where to write the
* output.
*/
void
EncodeTimeOnly(struct pg_tm * tm, fsec_t fsec, int *tzp, int style, char *str)
EncodeTimeOnly(struct pg_tm * tm, fsec_t fsec, bool print_tz, int tz, int style, char *str)
{
sprintf(str, "%02d:%02d:", tm->tm_hour, tm->tm_min);
str += strlen(str);
AppendSeconds(str, tm->tm_sec, fsec, MAX_TIME_PRECISION, true);
if (tzp != NULL)
EncodeTimezone(str, *tzp, style);
if (print_tz)
EncodeTimezone(str, tz, style);
}
/* EncodeDateTime()
* Encode date and time interpreted as local time.
* Support several date styles:
*
* tm and fsec are the value to encode, print_tz determines whether to include
* a time zone (the difference between timestamp and timestamptz types), tz is
* the numeric time zone offset, tzn is the textual time zone, which if
* specified will be used instead of tz by some styles, style is the date
* style, str is where to write the output.
*
* Supported date styles:
* Postgres - day mon hh:mm:ss yyyy tz
* SQL - mm/dd/yyyy hh:mm:ss.ss tz
* ISO - yyyy-mm-dd hh:mm:ss+/-tz
* German - dd.mm.yyyy hh:mm:ss tz
* XSD - yyyy-mm-ddThh:mm:ss.ss+/-tz
* Variants (affects order of month and day for Postgres and SQL styles):
* US - mm/dd/yyyy
* European - dd/mm/yyyy
*/
void
EncodeDateTime(struct pg_tm * tm, fsec_t fsec, int *tzp, char **tzn, int style, char *str)
EncodeDateTime(struct pg_tm * tm, fsec_t fsec, bool print_tz, int tz, const char *tzn, int style, char *str)
{
int day;
Assert(tm->tm_mon >= 1 && tm->tm_mon <= MONTHS_PER_YEAR);
/*
* Negative tm_isdst means we have no valid time zone translation.
*/
if (tm->tm_isdst < 0)
print_tz = false;
switch (style)
{
case USE_ISO_DATES:
@ -3729,14 +3744,8 @@ EncodeDateTime(struct pg_tm * tm, fsec_t fsec, int *tzp, char **tzn, int style,
AppendTimestampSeconds(str + strlen(str), tm, fsec);
/*
* tzp == NULL indicates that we don't want *any* time zone info
* in the output string. *tzn != NULL indicates that we have alpha
* time zone info available. tm_isdst != -1 indicates that we have
* a valid time zone translation.
*/
if (tzp != NULL && tm->tm_isdst >= 0)
EncodeTimezone(str, *tzp, style);
if (print_tz)
EncodeTimezone(str, tz, style);
if (tm->tm_year <= 0)
sprintf(str + strlen(str), " BC");
@ -3762,12 +3771,12 @@ EncodeDateTime(struct pg_tm * tm, fsec_t fsec, int *tzp, char **tzn, int style,
* TZ abbreviations in the Olson database are plain ASCII.
*/
if (tzp != NULL && tm->tm_isdst >= 0)
if (print_tz)
{
if (*tzn != NULL)
sprintf(str + strlen(str), " %.*s", MAXTZLEN, *tzn);
if (tzn)
sprintf(str + strlen(str), " %.*s", MAXTZLEN, tzn);
else
EncodeTimezone(str, *tzp, style);
EncodeTimezone(str, tz, style);
}
if (tm->tm_year <= 0)
@ -3785,12 +3794,12 @@ EncodeDateTime(struct pg_tm * tm, fsec_t fsec, int *tzp, char **tzn, int style,
AppendTimestampSeconds(str + strlen(str), tm, fsec);
if (tzp != NULL && tm->tm_isdst >= 0)
if (print_tz)
{
if (*tzn != NULL)
sprintf(str + strlen(str), " %.*s", MAXTZLEN, *tzn);
if (tzn)
sprintf(str + strlen(str), " %.*s", MAXTZLEN, tzn);
else
EncodeTimezone(str, *tzp, style);
EncodeTimezone(str, tz, style);
}
if (tm->tm_year <= 0)
@ -3819,10 +3828,10 @@ EncodeDateTime(struct pg_tm * tm, fsec_t fsec, int *tzp, char **tzn, int style,
sprintf(str + strlen(str), " %04d",
(tm->tm_year > 0) ? tm->tm_year : -(tm->tm_year - 1));
if (tzp != NULL && tm->tm_isdst >= 0)
if (print_tz)
{
if (*tzn != NULL)
sprintf(str + strlen(str), " %.*s", MAXTZLEN, *tzn);
if (tzn)
sprintf(str + strlen(str), " %.*s", MAXTZLEN, tzn);
else
{
/*
@ -3832,7 +3841,7 @@ EncodeDateTime(struct pg_tm * tm, fsec_t fsec, int *tzp, char **tzn, int style,
* the date/time parser later. - thomas 2001-10-19
*/
sprintf(str + strlen(str), " ");
EncodeTimezone(str, *tzp, style);
EncodeTimezone(str, tz, style);
}
}