--
-- create user defined conversion
--

-- directory paths and dlsuffix are passed to us in environment variables
\getenv libdir PG_LIBDIR
\getenv dlsuffix PG_DLSUFFIX

\set regresslib :libdir '/regress' :dlsuffix

CREATE FUNCTION test_enc_conversion(bytea, name, name, bool, validlen OUT int, result OUT bytea)
    AS :'regresslib', 'test_enc_conversion'
    LANGUAGE C STRICT;

CREATE USER regress_conversion_user WITH NOCREATEDB NOCREATEROLE;
SET SESSION AUTHORIZATION regress_conversion_user;
CREATE CONVERSION myconv FOR 'LATIN1' TO 'UTF8' FROM iso8859_1_to_utf8;
--
-- cannot make same name conversion in same schema
--
CREATE CONVERSION myconv FOR 'LATIN1' TO 'UTF8' FROM iso8859_1_to_utf8;
--
-- create default conversion with qualified name
--
CREATE DEFAULT CONVERSION public.mydef FOR 'LATIN1' TO 'UTF8' FROM iso8859_1_to_utf8;
--
-- cannot make default conversion with same schema/for_encoding/to_encoding
--
CREATE DEFAULT CONVERSION public.mydef2 FOR 'LATIN1' TO 'UTF8' FROM iso8859_1_to_utf8;
-- test comments
COMMENT ON CONVERSION myconv_bad IS 'foo';
COMMENT ON CONVERSION myconv IS 'bar';
COMMENT ON CONVERSION myconv IS NULL;
--
-- drop user defined conversion
--
DROP CONVERSION myconv;
DROP CONVERSION mydef;
--
-- Note: the built-in conversions are exercised in opr_sanity.sql,
-- so there's no need to do that here.
--
--
-- return to the superuser
--
RESET SESSION AUTHORIZATION;
DROP USER regress_conversion_user;

--
-- Test built-in conversion functions.
--

-- Helper function to test a conversion. Uses the test_enc_conversion function
-- that was created in the create_function_0 test.
create or replace function test_conv(
  input IN bytea,
  src_encoding IN text,
  dst_encoding IN text,

  result OUT bytea,
  errorat OUT bytea,
  error OUT text)
language plpgsql as
$$
declare
  validlen int;
begin
  -- First try to perform the conversion with noError = false. If that errors out,
  -- capture the error message, and try again with noError = true. The second call
  -- should succeed and return the position of the error, return that too.
  begin
    select * into validlen, result from test_enc_conversion(input, src_encoding, dst_encoding, false);
    errorat = NULL;
    error := NULL;
  exception when others then
    error := sqlerrm;
    select * into validlen, result from test_enc_conversion(input, src_encoding, dst_encoding, true);
    errorat = substr(input, validlen + 1);
  end;
  return;
end;
$$;


--
-- UTF-8
--
-- The description column must be unique.
CREATE TABLE utf8_verification_inputs (inbytes bytea, description text PRIMARY KEY);
insert into utf8_verification_inputs  values
  ('\x66006f',	'NUL byte'),
  ('\xaf',		'bare continuation'),
  ('\xc5',		'missing second byte in 2-byte char'),
  ('\xc080',	'smallest 2-byte overlong'),
  ('\xc1bf',	'largest 2-byte overlong'),
  ('\xc280',	'next 2-byte after overlongs'),
  ('\xdfbf',	'largest 2-byte'),
  ('\xe9af',	'missing third byte in 3-byte char'),
  ('\xe08080',	'smallest 3-byte overlong'),
  ('\xe09fbf',	'largest 3-byte overlong'),
  ('\xe0a080',	'next 3-byte after overlong'),
  ('\xed9fbf',	'last before surrogates'),
  ('\xeda080',	'smallest surrogate'),
  ('\xedbfbf',	'largest surrogate'),
  ('\xee8080',	'next after surrogates'),
  ('\xefbfbf',	'largest 3-byte'),
  ('\xf1afbf',	'missing fourth byte in 4-byte char'),
  ('\xf0808080',	'smallest 4-byte overlong'),
  ('\xf08fbfbf',	'largest 4-byte overlong'),
  ('\xf0908080',	'next 4-byte after overlong'),
  ('\xf48fbfbf',	'largest 4-byte'),
  ('\xf4908080',	'smallest too large'),
  ('\xfa9a9a8a8a',	'5-byte');

-- Test UTF-8 verification slow path
select description, (test_conv(inbytes, 'utf8', 'utf8')).* from utf8_verification_inputs;

-- Test UTF-8 verification with ASCII padding appended to provide
-- coverage for algorithms that work on multiple bytes at a time.
-- The error message for a sequence starting with a 4-byte lead
-- will contain all 4 bytes if they are present, so various
-- expressions below add 3 ASCII bytes to the end to ensure
-- consistent error messages.
-- The number 64 below needs to be at least the value of STRIDE_LENGTH in wchar.c.

-- Test multibyte verification in fast path
with test_bytes as (
  select
    inbytes,
    description,
    (test_conv(inbytes || repeat('.', 3)::bytea, 'utf8', 'utf8')).error
  from utf8_verification_inputs
), test_padded as (
  select
    description,
    (test_conv(inbytes || repeat('.', 64)::bytea, 'utf8', 'utf8')).error
  from test_bytes
)
select
  description,
  b.error as orig_error,
  p.error as error_after_padding
from test_padded p
join test_bytes b
using (description)
where p.error is distinct from b.error
order by description;

-- Test ASCII verification in fast path where incomplete
-- UTF-8 sequences fall at the end of the preceding chunk.
with test_bytes as (
  select
    inbytes,
    description,
    (test_conv(inbytes || repeat('.', 3)::bytea, 'utf8', 'utf8')).error
  from utf8_verification_inputs
), test_padded as (
  select
    description,
    (test_conv(repeat('.', 64 - length(inbytes))::bytea || inbytes || repeat('.', 64)::bytea, 'utf8', 'utf8')).error
  from test_bytes
)
select
  description,
  b.error as orig_error,
  p.error as error_after_padding
from test_padded p
join test_bytes b
using (description)
where p.error is distinct from b.error
order by description;

-- Test cases where UTF-8 sequences within short text
-- come after the fast path returns.
with test_bytes as (
  select
    inbytes,
    description,
    (test_conv(inbytes || repeat('.', 3)::bytea, 'utf8', 'utf8')).error
  from utf8_verification_inputs
), test_padded as (
  select
    description,
    (test_conv(repeat('.', 64)::bytea || inbytes || repeat('.', 3)::bytea, 'utf8', 'utf8')).error
  from test_bytes
)
select
  description,
  b.error as orig_error,
  p.error as error_after_padding
from test_padded p
join test_bytes b
using (description)
where p.error is distinct from b.error
order by description;

-- Test cases where incomplete UTF-8 sequences fall at the
-- end of the part checked by the fast path.
with test_bytes as (
  select
    inbytes,
    description,
    (test_conv(inbytes || repeat('.', 3)::bytea, 'utf8', 'utf8')).error
  from utf8_verification_inputs
), test_padded as (
  select
    description,
    (test_conv(repeat('.', 64 - length(inbytes))::bytea || inbytes || repeat('.', 3)::bytea, 'utf8', 'utf8')).error
  from test_bytes
)
select
  description,
  b.error as orig_error,
  p.error as error_after_padding
from test_padded p
join test_bytes b
using (description)
where p.error is distinct from b.error
order by description;

CREATE TABLE utf8_inputs (inbytes bytea, description text);
insert into utf8_inputs  values
  ('\x666f6f',		'valid, pure ASCII'),
  ('\xc3a4c3b6',	'valid, extra latin chars'),
  ('\xd184d0bed0be',	'valid, cyrillic'),
  ('\x666f6fe8b1a1',	'valid, kanji/Chinese'),
  ('\xe382abe3829a',	'valid, two chars that combine to one in EUC_JIS_2004'),
  ('\xe382ab',		'only first half of combined char in EUC_JIS_2004'),
  ('\xe382abe382',	'incomplete combination when converted EUC_JIS_2004'),
  ('\xecbd94eb81bceba6ac', 'valid, Hangul, Korean'),
  ('\x666f6fefa8aa',	'valid, needs mapping function to convert to GB18030'),
  ('\x66e8b1ff6f6f',	'invalid byte sequence'),
  ('\x66006f',		'invalid, NUL byte'),
  ('\x666f6fe8b100',	'invalid, NUL byte'),
  ('\x666f6fe8b1',	'incomplete character at end');

-- Test UTF-8 verification
select description, (test_conv(inbytes, 'utf8', 'utf8')).* from utf8_inputs;
-- Test conversions from UTF-8
select description, inbytes, (test_conv(inbytes, 'utf8', 'euc_jis_2004')).* from utf8_inputs;
select description, inbytes, (test_conv(inbytes, 'utf8', 'latin1')).* from utf8_inputs;
select description, inbytes, (test_conv(inbytes, 'utf8', 'latin2')).* from utf8_inputs;
select description, inbytes, (test_conv(inbytes, 'utf8', 'latin5')).* from utf8_inputs;
select description, inbytes, (test_conv(inbytes, 'utf8', 'koi8r')).* from utf8_inputs;
select description, inbytes, (test_conv(inbytes, 'utf8', 'gb18030')).* from utf8_inputs;

--
-- EUC_JIS_2004
--
CREATE TABLE euc_jis_2004_inputs (inbytes bytea, description text);
insert into euc_jis_2004_inputs  values
  ('\x666f6f',		'valid, pure ASCII'),
  ('\x666f6fbedd',	'valid'),
  ('\xa5f7',		'valid, translates to two UTF-8 chars '),
  ('\xbeddbe',		'incomplete char '),
  ('\x666f6f00bedd',	'invalid, NUL byte'),
  ('\x666f6fbe00dd',	'invalid, NUL byte'),
  ('\x666f6fbedd00',	'invalid, NUL byte'),
  ('\xbe04',		'invalid byte sequence');

-- Test EUC_JIS_2004 verification
select description, inbytes, (test_conv(inbytes, 'euc_jis_2004', 'euc_jis_2004')).* from euc_jis_2004_inputs;
-- Test conversions from EUC_JIS_2004
select description, inbytes, (test_conv(inbytes, 'euc_jis_2004', 'utf8')).* from euc_jis_2004_inputs;

--
-- SHIFT-JIS-2004
--
CREATE TABLE shiftjis2004_inputs (inbytes bytea, description text);
insert into shiftjis2004_inputs  values
  ('\x666f6f',		'valid, pure ASCII'),
  ('\x666f6f8fdb',	'valid'),
  ('\x666f6f81c0',	'valid, no translation to UTF-8'),
  ('\x666f6f82f5',	'valid, translates to two UTF-8 chars '),
  ('\x666f6f8fdb8f',	'incomplete char '),
  ('\x666f6f820a',	'incomplete char, followed by newline '),
  ('\x666f6f008fdb',	'invalid, NUL byte'),
  ('\x666f6f8f00db',	'invalid, NUL byte'),
  ('\x666f6f8fdb00',	'invalid, NUL byte');

-- Test SHIFT-JIS-2004 verification
select description, inbytes, (test_conv(inbytes, 'shiftjis2004', 'shiftjis2004')).* from shiftjis2004_inputs;
-- Test conversions from SHIFT-JIS-2004
select description, inbytes, (test_conv(inbytes, 'shiftjis2004', 'utf8')).* from shiftjis2004_inputs;
select description, inbytes, (test_conv(inbytes, 'shiftjis2004', 'euc_jis_2004')).* from shiftjis2004_inputs;

--
-- GB18030
--
CREATE TABLE gb18030_inputs (inbytes bytea, description text);
insert into gb18030_inputs  values
  ('\x666f6f',		'valid, pure ASCII'),
  ('\x666f6fcff3',	'valid'),
  ('\x666f6f8431a530',	'valid, no translation to UTF-8'),
  ('\x666f6f84309c38',	'valid, translates to UTF-8 by mapping function'),
  ('\x666f6f84309c',	'incomplete char '),
  ('\x666f6f84309c0a',	'incomplete char, followed by newline '),
  ('\x666f6f84309c3800', 'invalid, NUL byte'),
  ('\x666f6f84309c0038', 'invalid, NUL byte');

-- Test GB18030 verification
select description, inbytes, (test_conv(inbytes, 'gb18030', 'gb18030')).* from gb18030_inputs;
-- Test conversions from GB18030
select description, inbytes, (test_conv(inbytes, 'gb18030', 'utf8')).* from gb18030_inputs;


--
-- ISO-8859-5
--
CREATE TABLE iso8859_5_inputs (inbytes bytea, description text);
insert into iso8859_5_inputs  values
  ('\x666f6f',		'valid, pure ASCII'),
  ('\xe4dede',		'valid'),
  ('\x00',		'invalid, NUL byte'),
  ('\xe400dede',	'invalid, NUL byte'),
  ('\xe4dede00',	'invalid, NUL byte');

-- Test ISO-8859-5 verification
select description, inbytes, (test_conv(inbytes, 'iso8859-5', 'iso8859-5')).* from iso8859_5_inputs;
-- Test conversions from ISO-8859-5
select description, inbytes, (test_conv(inbytes, 'iso8859-5', 'utf8')).* from iso8859_5_inputs;
select description, inbytes, (test_conv(inbytes, 'iso8859-5', 'koi8r')).* from iso8859_5_inputs;
select description, inbytes, (test_conv(inbytes, 'iso8859_5', 'mule_internal')).* from iso8859_5_inputs;

--
-- Big5
--
CREATE TABLE big5_inputs (inbytes bytea, description text);
insert into big5_inputs  values
  ('\x666f6f',		'valid, pure ASCII'),
  ('\x666f6fb648',	'valid'),
  ('\x666f6fa27f',	'valid, no translation to UTF-8'),
  ('\x666f6fb60048',	'invalid, NUL byte'),
  ('\x666f6fb64800',	'invalid, NUL byte');

-- Test Big5 verification
select description, inbytes, (test_conv(inbytes, 'big5', 'big5')).* from big5_inputs;
-- Test conversions from Big5
select description, inbytes, (test_conv(inbytes, 'big5', 'utf8')).* from big5_inputs;
select description, inbytes, (test_conv(inbytes, 'big5', 'mule_internal')).* from big5_inputs;

--
-- MULE_INTERNAL
--
CREATE TABLE mic_inputs (inbytes bytea, description text);
insert into mic_inputs  values
  ('\x666f6f',		'valid, pure ASCII'),
  ('\x8bc68bcf8bcf',	'valid (in KOI8R)'),
  ('\x8bc68bcf8b',	'invalid,incomplete char'),
  ('\x92bedd',		'valid (in SHIFT_JIS)'),
  ('\x92be',		'invalid, incomplete char)'),
  ('\x666f6f95a3c1',	'valid (in Big5)'),
  ('\x666f6f95a3',	'invalid, incomplete char'),
  ('\x9200bedd',	'invalid, NUL byte'),
  ('\x92bedd00',	'invalid, NUL byte'),
  ('\x8b00c68bcf8bcf',	'invalid, NUL byte');

-- Test MULE_INTERNAL verification
select description, inbytes, (test_conv(inbytes, 'mule_internal', 'mule_internal')).* from mic_inputs;
-- Test conversions from MULE_INTERNAL
select description, inbytes, (test_conv(inbytes, 'mule_internal', 'koi8r')).* from mic_inputs;
select description, inbytes, (test_conv(inbytes, 'mule_internal', 'iso8859-5')).* from mic_inputs;
select description, inbytes, (test_conv(inbytes, 'mule_internal', 'sjis')).* from mic_inputs;
select description, inbytes, (test_conv(inbytes, 'mule_internal', 'big5')).* from mic_inputs;
select description, inbytes, (test_conv(inbytes, 'mule_internal', 'euc_jp')).* from mic_inputs;