database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-14 18:42:34 +03:00
Code Activity

Simplify and standardize conversions between TEXT datums and ordinary C

Browse Source 
strings.  This patch introduces four support functions cstring_to_text,
cstring_to_text_with_len, text_to_cstring, and text_to_cstring_buffer, and
two macros CStringGetTextDatum and TextDatumGetCString.  A number of
existing macros that provided variants on these themes were removed.

Most of the places that need to make such conversions now require just one
function or macro call, in place of the multiple notational layers that used
to be needed.  There are no longer any direct calls of textout or textin,
and we got most of the places that were using handmade conversions via
memcpy (there may be a few still lurking, though).

This commit doesn't make any serious effort to eliminate transient memory
leaks caused by detoasting toasted text objects before they reach
text_to_cstring.  We changed PG_GETARG_TEXT_P to PG_GETARG_TEXT_PP in a few
places where it was easy, but much more could be done.

Brendan Jurd and Tom Lane
This commit is contained in:
Tom Lane
2008-03-25 22:42:46 +00:00
parent f948197b40
commit 220db7ccd8
94 changed files with 771 additions and 1211 deletions
Download Patch File Download Diff File Expand all files Collapse all files

70
src/backend/utils/adt/timestamp.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.186 2008/03/21 01:31:42 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.187 2008/03/25 22:42:44 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -3242,7 +3242,7 @@ timestamptz_age(PG_FUNCTION_ARGS)
Datum
timestamp_trunc(PG_FUNCTION_ARGS)
{
text *units = PG_GETARG_TEXT_P(0);
text *units = PG_GETARG_TEXT_PP(0);
Timestamp timestamp = PG_GETARG_TIMESTAMP(1);
Timestamp result;
int type,
@ -3255,8 +3255,8 @@ timestamp_trunc(PG_FUNCTION_ARGS)
if (TIMESTAMP_NOT_FINITE(timestamp))
PG_RETURN_TIMESTAMP(timestamp);
lowunits = downcase_truncate_identifier(VARDATA(units),
VARSIZE(units) - VARHDRSZ,
lowunits = downcase_truncate_identifier(VARDATA_ANY(units),
VARSIZE_ANY_EXHDR(units),
false);
type = DecodeUnits(0, lowunits, &val);
@ -3374,7 +3374,7 @@ timestamp_trunc(PG_FUNCTION_ARGS)
Datum
timestamptz_trunc(PG_FUNCTION_ARGS)
{
text *units = PG_GETARG_TEXT_P(0);
text *units = PG_GETARG_TEXT_PP(0);
TimestampTz timestamp = PG_GETARG_TIMESTAMPTZ(1);
TimestampTz result;
int tz;
@ -3390,8 +3390,8 @@ timestamptz_trunc(PG_FUNCTION_ARGS)
if (TIMESTAMP_NOT_FINITE(timestamp))
PG_RETURN_TIMESTAMPTZ(timestamp);
lowunits = downcase_truncate_identifier(VARDATA(units),
VARSIZE(units) - VARHDRSZ,
lowunits = downcase_truncate_identifier(VARDATA_ANY(units),
VARSIZE_ANY_EXHDR(units),
false);
type = DecodeUnits(0, lowunits, &val);
@ -3532,7 +3532,7 @@ timestamptz_trunc(PG_FUNCTION_ARGS)
Datum
interval_trunc(PG_FUNCTION_ARGS)
{
text *units = PG_GETARG_TEXT_P(0);
text *units = PG_GETARG_TEXT_PP(0);
Interval *interval = PG_GETARG_INTERVAL_P(1);
Interval *result;
int type,
@ -3544,8 +3544,8 @@ interval_trunc(PG_FUNCTION_ARGS)
result = (Interval *) palloc(sizeof(Interval));
lowunits = downcase_truncate_identifier(VARDATA(units),
VARSIZE(units) - VARHDRSZ,
lowunits = downcase_truncate_identifier(VARDATA_ANY(units),
VARSIZE_ANY_EXHDR(units),
false);
type = DecodeUnits(0, lowunits, &val);
@ -3615,9 +3615,7 @@ interval_trunc(PG_FUNCTION_ARGS)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("interval units \"%s\" not recognized",
DatumGetCString(DirectFunctionCall1(textout,
PointerGetDatum(units))))));
*result = *interval;
lowunits)));
}
PG_RETURN_INTERVAL_P(result);
@ -3803,7 +3801,7 @@ date2isoyearday(int year, int mon, int mday)
Datum
timestamp_part(PG_FUNCTION_ARGS)
{
text *units = PG_GETARG_TEXT_P(0);
text *units = PG_GETARG_TEXT_PP(0);
Timestamp timestamp = PG_GETARG_TIMESTAMP(1);
float8 result;
int type,
@ -3819,8 +3817,8 @@ timestamp_part(PG_FUNCTION_ARGS)
PG_RETURN_FLOAT8(result);
}
lowunits = downcase_truncate_identifier(VARDATA(units),
VARSIZE(units) - VARHDRSZ,
lowunits = downcase_truncate_identifier(VARDATA_ANY(units),
VARSIZE_ANY_EXHDR(units),
false);
type = DecodeUnits(0, lowunits, &val);
@ -4031,7 +4029,7 @@ timestamp_part(PG_FUNCTION_ARGS)
Datum
timestamptz_part(PG_FUNCTION_ARGS)
{
text *units = PG_GETARG_TEXT_P(0);
text *units = PG_GETARG_TEXT_PP(0);
TimestampTz timestamp = PG_GETARG_TIMESTAMPTZ(1);
float8 result;
int tz;
@ -4050,8 +4048,8 @@ timestamptz_part(PG_FUNCTION_ARGS)
PG_RETURN_FLOAT8(result);
}
lowunits = downcase_truncate_identifier(VARDATA(units),
VARSIZE(units) - VARHDRSZ,
lowunits = downcase_truncate_identifier(VARDATA_ANY(units),
VARSIZE_ANY_EXHDR(units),
false);
type = DecodeUnits(0, lowunits, &val);
@ -4246,7 +4244,7 @@ timestamptz_part(PG_FUNCTION_ARGS)
Datum
interval_part(PG_FUNCTION_ARGS)
{
text *units = PG_GETARG_TEXT_P(0);
text *units = PG_GETARG_TEXT_PP(0);
Interval *interval = PG_GETARG_INTERVAL_P(1);
float8 result;
int type,
@ -4256,8 +4254,8 @@ interval_part(PG_FUNCTION_ARGS)
struct pg_tm tt,
*tm = &tt;
lowunits = downcase_truncate_identifier(VARDATA(units),
VARSIZE(units) - VARHDRSZ,
lowunits = downcase_truncate_identifier(VARDATA_ANY(units),
VARSIZE_ANY_EXHDR(units),
false);
type = DecodeUnits(0, lowunits, &val);
@ -4337,8 +4335,7 @@ interval_part(PG_FUNCTION_ARGS)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("interval units \"%s\" not supported",
DatumGetCString(DirectFunctionCall1(textout,
PointerGetDatum(units))))));
lowunits)));
result = 0;
}
@ -4365,8 +4362,7 @@ interval_part(PG_FUNCTION_ARGS)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("interval units \"%s\" not recognized",
DatumGetCString(DirectFunctionCall1(textout,
PointerGetDatum(units))))));
lowunits)));
result = 0;
}
@ -4385,13 +4381,12 @@ interval_part(PG_FUNCTION_ARGS)
Datum
timestamp_zone(PG_FUNCTION_ARGS)
{
text *zone = PG_GETARG_TEXT_P(0);
text *zone = PG_GETARG_TEXT_PP(0);
Timestamp timestamp = PG_GETARG_TIMESTAMP(1);
TimestampTz result;
int tz;
pg_tz *tzp;
char tzname[TZ_STRLEN_MAX + 1];
int len;
if (TIMESTAMP_NOT_FINITE(timestamp))
PG_RETURN_TIMESTAMPTZ(timestamp);
@ -4401,9 +4396,7 @@ timestamp_zone(PG_FUNCTION_ARGS)
* (to handle cases like "America/New_York"), and if that fails, we look
* in the date token table (to handle cases like "EST").
*/
len = Min(VARSIZE(zone) - VARHDRSZ, TZ_STRLEN_MAX);
memcpy(tzname, VARDATA(zone), len);
tzname[len] = '\0';
text_to_cstring_buffer(zone, tzname, sizeof(tzname));
tzp = pg_tzset(tzname);
if (tzp)
{
@ -4428,8 +4421,8 @@ timestamp_zone(PG_FUNCTION_ARGS)
int type,
val;
lowzone = downcase_truncate_identifier(VARDATA(zone),
VARSIZE(zone) - VARHDRSZ,
lowzone = downcase_truncate_identifier(tzname,
strlen(tzname),
false);
type = DecodeSpecial(0, lowzone, &val);
@ -4558,13 +4551,12 @@ timestamptz_timestamp(PG_FUNCTION_ARGS)
Datum
timestamptz_zone(PG_FUNCTION_ARGS)
{
text *zone = PG_GETARG_TEXT_P(0);
text *zone = PG_GETARG_TEXT_PP(0);
TimestampTz timestamp = PG_GETARG_TIMESTAMPTZ(1);
Timestamp result;
int tz;
pg_tz *tzp;
char tzname[TZ_STRLEN_MAX + 1];
int len;
if (TIMESTAMP_NOT_FINITE(timestamp))
PG_RETURN_TIMESTAMP(timestamp);
@ -4574,9 +4566,7 @@ timestamptz_zone(PG_FUNCTION_ARGS)
* (to handle cases like "America/New_York"), and if that fails, we look
* in the date token table (to handle cases like "EST").
*/
len = Min(VARSIZE(zone) - VARHDRSZ, TZ_STRLEN_MAX);
memcpy(tzname, VARDATA(zone), len);
tzname[len] = '\0';
text_to_cstring_buffer(zone, tzname, sizeof(tzname));
tzp = pg_tzset(tzname);
if (tzp)
{
@ -4600,8 +4590,8 @@ timestamptz_zone(PG_FUNCTION_ARGS)
int type,
val;
lowzone = downcase_truncate_identifier(VARDATA(zone),
VARSIZE(zone) - VARHDRSZ,
lowzone = downcase_truncate_identifier(tzname,
strlen(tzname),
false);
type = DecodeSpecial(0, lowzone, &val);