/*
* get the length of the string considered as text in the specified
* encoding. Raises an error if the data is not valid in that
* encoding.
*
* INT4 length (BYTEA string, NAME src_encoding_name)
*/
Datum
length_in_encoding(PG_FUNCTION_ARGS)
{
bytea *string = PG_GETARG_BYTEA_P(0);
char *src_encoding_name = NameStr(*PG_GETARG_NAME(1));
int src_encoding = pg_char_to_encoding(src_encoding_name);
int len = VARSIZE(string) - VARHDRSZ;
int retval;
if (src_encoding < 0)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("invalid encoding name \"%s\"",
src_encoding_name)));
retval = pg_verify_mbstr_len(src_encoding, VARDATA(string), len, false);
PG_RETURN_INT32(retval);
}
/*
* Verify mbstr to make sure that it is validly encoded in the specified
* encoding.
*/
bool
pg_verify_mbstr(int encoding, const char *mbstr, int len, bool noError)
{
return pg_verify_mbstr_len(encoding, mbstr, len, noError) >= 0;
}
/*
* Verify mbstr to make sure that it is validly encoded in the current
* database encoding. Otherwise same as pg_verify_mbstr().
*/
bool
pg_verifymbstr(const char *mbstr, int len, bool noError)
{
return
pg_verify_mbstr_len(GetDatabaseEncoding(), mbstr, len, noError) >= 0;
}
/*
* Verify mbstr to make sure that it is validly encoded in the current
* database encoding. Otherwise same as pg_verify_mbstr().
*/
bool
pg_verifymbstr(const char *mbstr, int len, bool noError)
{
return pg_verify_mbstr_len(get_db_encoding(), mbstr, len, noError) >= 0;
}
int postgresql_is_valid_utf8 (size_t len, char *value)
{
return pg_verify_mbstr_len(PG_UTF8, value, len, true, true) >= 0;
}
