Function icu_to_uchar_core

pg_documentdb_core/src/collation/collation.c:1080–1094

* Ported from pg_locale.c in Postgres 17: * See https://github.com/postgres/postgres/blob/REL_17_STABLE/src/backend/utils/adt/pg_locale.c#L2758 * Convert a string in the database encoding into a string of UChars. * * The source string at buff is of length nbytes * (it needn't be nul-terminated) * * *buff_uchar receives a pointer to the palloc'd result string, and * the function's result is

 * result length instead.
 */
static int32_t
icu_to_uchar_core(UChar **buff_uchar, const char *buff, size_t nbytes)
{
	int32_t len_uchar;

	init_icu_converter();

	len_uchar = uchar_length(icu_converter, buff, nbytes);

	*buff_uchar = palloc((len_uchar + 1) * sizeof(**buff_uchar));
	len_uchar = uchar_convert(icu_converter,
							  *buff_uchar, len_uchar + 1, buff, nbytes);

	return len_uchar;
}