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/* Test of u8_mbsnlen() function.
Copyright (C) 2010-2024 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2010. */
#include <config.h>
#include "unistr.h"
#include "macros.h"
int
main ()
{
/* Simple string. */
{ /* "Grüß Gott. Здравствуйте! x=(-b±sqrt(b²-4ac))/(2a) 日本語,中文,한글" */
static const uint8_t input[] =
{ 'G', 'r', 0xC3, 0xBC, 0xC3, 0x9F, ' ', 'G', 'o', 't', 't', '.', ' ',
0xD0, 0x97, 0xD0, 0xB4, 0xD1, 0x80, 0xD0, 0xB0, 0xD0, 0xB2, 0xD1, 0x81,
0xD1, 0x82, 0xD0, 0xB2, 0xD1, 0x83, 0xD0, 0xB9, 0xD1, 0x82, 0xD0, 0xB5,
'!', ' ', 'x', '=', '(', '-', 'b', 0xC2, 0xB1, 's', 'q', 'r', 't', '(',
'b', 0xC2, 0xB2, '-', '4', 'a', 'c', ')', ')', '/', '(', '2', 'a', ')',
' ', ' ', 0xE6, 0x97, 0xA5, 0xE6, 0x9C, 0xAC, 0xE8, 0xAA, 0x9E, ',',
0xE4, 0xB8, 0xAD, 0xE6, 0x96, 0x87, ',',
0xED, 0x95, 0x9C, 0xEA, 0xB8, 0x80, '\n'
};
static const size_t expected[SIZEOF (input) + 1] =
{ 0,
1, 2, 3, 3, 4, 4, 5, 6, 7, 8, 9, 10, 11,
12, 12, 13, 13, 14, 14, 15, 15, 16, 16, 17, 17,
18, 18, 19, 19, 20, 20, 21, 21, 22, 22, 23, 23,
24, 25, 26, 27, 28, 29, 30, 31, 31, 32, 33, 34, 35, 36,
37, 38, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49,
50, 51, 52, 52, 52, 53, 53, 53, 54, 54, 54, 55,
56, 56, 56, 57, 57, 57, 58,
59, 59, 59, 60, 60, 60, 61
};
size_t n;
for (n = 0; n <= SIZEOF (input); n++)
{
size_t len = u8_mbsnlen (input, n);
ASSERT (len == expected[n]);
}
}
/* Test behaviour required by ISO 10646-1, sections R.7 and 2.3c, namely,
that a "malformed sequence" is interpreted in the same way as
"a character that is outside the adopted subset".
Reference:
ISO 10646-1 amendment 2
<https://www.cl.cam.ac.uk/~mgk25/ucs/ISO-10646-UTF-8.html>
Markus Kuhn: UTF-8 decoder capability and stress test
<https://www.cl.cam.ac.uk/~mgk25/ucs/examples/UTF-8-test.txt>
<https://www.w3.org/2001/06/utf-8-wrong/UTF-8-test.html>
These old specifications (from ca. 2000) were a bit ambiguous, and the
definition of UTF-8 has changed a bit as well. The newer specification
we obey is the Unicode Standard, version 15.
Reference:
Unicode Standard 15.0.0, section 3.9
<https://www.unicode.org/versions/Unicode15.0.0/ch03.pdf>
pages 124..129, especially table 3-7.
*/
/* 3.1. Test that each unexpected continuation byte is signalled as a
malformed sequence of its own. */
{
static const uint8_t input[] = { '"', 0x80, 0xBF, 0x80, 0xBF, '"' };
ASSERT (u8_mbsnlen (input, 6) == 6);
}
/* 3.2. Lonely start characters. */
{
ucs4_t c;
uint8_t input[2];
for (c = 0xC0; c <= 0xFF; c++)
{
input[0] = c;
input[1] = ' ';
ASSERT (u8_mbsnlen (input, 2) == 2);
}
}
/* 3.3. Sequences with last continuation byte missing. */
/* 3.3.1. 2-byte sequence with last byte missing. */
{
static const uint8_t input[] = { '"', 0xC0, '"' };
ASSERT (u8_mbsnlen (input, 3) == 3);
}
/* 3.3.6. 2-byte sequence with last byte missing. */
{
static const uint8_t input[] = { '"', 0xDF, '"' };
ASSERT (u8_mbsnlen (input, 3) == 3);
}
/* 3.3.2. 3-byte sequence with last byte missing. */
{
static const uint8_t input[] = { '"', 0xE0, 0xA0, '"' };
ASSERT (u8_mbsnlen (input, 4) == 3);
}
{
/* Outdated example: 0xE0 0x80 is an ill-formed sequence. */
static const uint8_t input[] = { '"', 0xE0, 0x80, '"' };
ASSERT (u8_mbsnlen (input, 4) == 4);
}
/* 3.3.7. 3-byte sequence with last byte missing. */
{
static const uint8_t input[] = { '"', 0xEF, 0xBF, '"' };
ASSERT (u8_mbsnlen (input, 4) == 3);
}
/* 3.3.3. 4-byte sequence with last byte missing. */
{
static const uint8_t input[] = { '"', 0xF0, 0x90, 0x80, '"' };
ASSERT (u8_mbsnlen (input, 5) == 3);
}
{
/* Outdated example: 0xF0 0x80 is an ill-formed sequence. */
static const uint8_t input[] = { '"', 0xF0, 0x80, 0x80, '"' };
ASSERT (u8_mbsnlen (input, 5) == 5);
}
/* 3.3.8. 4-byte sequence with last byte missing. */
{
static const uint8_t input[] = { '"', 0xF3, 0xBF, 0xBF, '"' };
ASSERT (u8_mbsnlen (input, 5) == 3);
}
{
/* Outdated example: 0xF7 is an invalid first byte. */
static const uint8_t input[] = { '"', 0xF7, 0xBF, 0xBF, '"' };
ASSERT (u8_mbsnlen (input, 5) == 5);
}
return test_exit_status;
}
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