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/*-----------------------------------------------------------------------
*
* PostgreSQL locale utilities for builtin provider
*
* Portions Copyright (c) 2002-2024, PostgreSQL Global Development Group
*
* src/backend/utils/adt/pg_locale_builtin.c
*
*-----------------------------------------------------------------------
*/
#include "postgres.h"
#include "catalog/pg_database.h"
#include "catalog/pg_collation.h"
#include "mb/pg_wchar.h"
#include "miscadmin.h"
#include "utils/builtins.h"
#include "utils/memutils.h"
#include "utils/pg_locale.h"
#include "utils/syscache.h"
extern pg_locale_t create_pg_locale_builtin(Oid collid,
MemoryContext context);
pg_locale_t
create_pg_locale_builtin(Oid collid, MemoryContext context)
{
const char *locstr;
pg_locale_t result;
if (collid == DEFAULT_COLLATION_OID)
{
HeapTuple tp;
Datum datum;
tp = SearchSysCache1(DATABASEOID, ObjectIdGetDatum(MyDatabaseId));
if (!HeapTupleIsValid(tp))
elog(ERROR, "cache lookup failed for database %u", MyDatabaseId);
datum = SysCacheGetAttrNotNull(DATABASEOID, tp,
Anum_pg_database_datlocale);
locstr = TextDatumGetCString(datum);
ReleaseSysCache(tp);
}
else
{
HeapTuple tp;
Datum datum;
tp = SearchSysCache1(COLLOID, ObjectIdGetDatum(collid));
if (!HeapTupleIsValid(tp))
elog(ERROR, "cache lookup failed for collation %u", collid);
datum = SysCacheGetAttrNotNull(COLLOID, tp,
Anum_pg_collation_colllocale);
locstr = TextDatumGetCString(datum);
ReleaseSysCache(tp);
}
builtin_validate_locale(GetDatabaseEncoding(), locstr);
result = MemoryContextAllocZero(context, sizeof(struct pg_locale_struct));
result->info.builtin.locale = MemoryContextStrdup(context, locstr);
result->provider = COLLPROVIDER_BUILTIN;
result->deterministic = true;
result->collate_is_c = true;
result->ctype_is_c = (strcmp(locstr, "C") == 0);
return result;
}
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