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gnu / gcc / 1a04ce6cb15f00e92a10c9fb3271700f202aa78a / . / libstdc++-v3 / testsuite / 22_locale / codecvt / codecvt_unicode.h
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// Copyright (C) 2020-2025 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library 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, or (at your option)
// any later version.
// This library 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 library; see the file COPYING3. If not see
// <http://www.gnu.org/licenses/>.
#include <algorithm>
#include <locale>
#include <testsuite_hooks.h>
struct test_offsets_ok
{
size_t in_size, out_size;
};
struct test_offsets_partial
{
size_t in_size, out_size, expected_in_next, expected_out_next;
};
template <class CharT> struct test_offsets_error
{
size_t in_size, out_size, expected_in_next, expected_out_next;
CharT replace_char;
size_t replace_pos;
};
template <class T, size_t N>
auto constexpr array_size (const T (&)[N]) -> size_t
{
return N;
}
template <class InternT, class ExternT>
void
utf8_to_utf32_in_ok (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
using namespace std;
// UTF-8 string of 1-byte CP, 2-byte CP, 3-byte CP and 4-byte CP
const unsigned char input[] = "b\u0448\uAAAA\U0010AAAA";
const char32_t expected[] = U"b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 11, "");
static_assert (array_size (expected) == 5, "");
ExternT in[array_size (input)];
InternT exp[array_size (expected)];
copy (begin (input), end (input), begin (in));
copy (begin (expected), end (expected), begin (exp));
VERIFY (char_traits<ExternT>::length (in) == 10);
VERIFY (char_traits<InternT>::length (exp) == 4);
test_offsets_ok offsets[] = {{0, 0}, {1, 1}, {3, 2}, {6, 3}, {10, 4}};
for (auto t : offsets)
{
InternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
auto state = mbstate_t{};
auto in_next = (const ExternT *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.in (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.ok);
VERIFY (in_next == in + t.in_size);
VERIFY (out_next == out + t.out_size);
VERIFY (char_traits<InternT>::compare (out, exp, t.out_size) == 0);
if (t.out_size < array_size (out))
VERIFY (out[t.out_size] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, t.out_size);
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.in_size);
}
for (auto t : offsets)
{
InternT out[array_size (exp)] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
auto state = mbstate_t{};
auto in_next = (const ExternT *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res
= cvt.in (state, in, in + t.in_size, in_next, out, end (out), out_next);
VERIFY (res == cvt.ok);
VERIFY (in_next == in + t.in_size);
VERIFY (out_next == out + t.out_size);
VERIFY (char_traits<InternT>::compare (out, exp, t.out_size) == 0);
if (t.out_size < array_size (out))
VERIFY (out[t.out_size] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, array_size (out));
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.in_size);
}
}
template <class InternT, class ExternT>
void
utf8_to_utf32_in_partial (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
using namespace std;
// UTF-8 string of 1-byte CP, 2-byte CP, 3-byte CP and 4-byte CP
const unsigned char input[] = "b\u0448\uAAAA\U0010AAAA";
const char32_t expected[] = U"b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 11, "");
static_assert (array_size (expected) == 5, "");
ExternT in[array_size (input)];
InternT exp[array_size (expected)];
copy (begin (input), end (input), begin (in));
copy (begin (expected), end (expected), begin (exp));
VERIFY (char_traits<ExternT>::length (in) == 10);
VERIFY (char_traits<InternT>::length (exp) == 4);
test_offsets_partial offsets[] = {
{1, 0, 0, 0}, // no space for first CP
{3, 1, 1, 1}, // no space for second CP
{2, 2, 1, 1}, // incomplete second CP
{2, 1, 1, 1}, // incomplete second CP, and no space for it
{6, 2, 3, 2}, // no space for third CP
{4, 3, 3, 2}, // incomplete third CP
{5, 3, 3, 2}, // incomplete third CP
{4, 2, 3, 2}, // incomplete third CP, and no space for it
{5, 2, 3, 2}, // incomplete third CP, and no space for it
{10, 3, 6, 3}, // no space for fourth CP
{7, 4, 6, 3}, // incomplete fourth CP
{8, 4, 6, 3}, // incomplete fourth CP
{9, 4, 6, 3}, // incomplete fourth CP
{7, 3, 6, 3}, // incomplete fourth CP, and no space for it
{8, 3, 6, 3}, // incomplete fourth CP, and no space for it
{9, 3, 6, 3}, // incomplete fourth CP, and no space for it
};
for (auto t : offsets)
{
InternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto state = mbstate_t{};
auto in_next = (const ExternT *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.in (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.partial);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<InternT>::compare (out, exp, t.expected_out_next)
== 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, t.out_size);
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.expected_in_next);
}
}
template <class InternT, class ExternT>
void
utf8_to_utf32_in_error (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
using namespace std;
// UTF-8 string of 1-byte CP, 2-byte CP, 3-byte CP, 4-byte CP
const unsigned char input[] = "b\u0448\uD700\U0010AAAA";
const char32_t expected[] = U"b\u0448\uD700\U0010AAAA";
static_assert (array_size (input) == 11, "");
static_assert (array_size (expected) == 5, "");
ExternT in[array_size (input)];
InternT exp[array_size (expected)];
copy (begin (input), end (input), begin (in));
copy (begin (expected), end (expected), begin (exp));
VERIFY (char_traits<ExternT>::length (in) == 10);
VERIFY (char_traits<InternT>::length (exp) == 4);
// There are 5 classes of errors in UTF-8 decoding
// 1. Missing leading byte
// 2. Missing trailing byte
// 3. Surrogate CP
// 4. Overlong sequence
// 5. CP out of Unicode range
test_offsets_error<unsigned char> offsets[] = {
// 1. Missing leading byte. We will replace the leading byte with
// non-leading byte, such as a byte that is always invalid or a trailing
// byte.
// replace leading byte with invalid byte
{1, 4, 0, 0, 0xFF, 0},
{3, 4, 1, 1, 0xFF, 1},
{6, 4, 3, 2, 0xFF, 3},
{10, 4, 6, 3, 0xFF, 6},
// replace leading byte with trailing byte
{1, 4, 0, 0, 0b10101010, 0},
{3, 4, 1, 1, 0b10101010, 1},
{6, 4, 3, 2, 0b10101010, 3},
{10, 4, 6, 3, 0b10101010, 6},
// 2. Missing trailing byte. We will replace the trailing byte with
// non-trailing byte, such as a byte that is always invalid or a leading
// byte (simple ASCII byte in our case).
// replace first trailing byte with ASCII byte
{3, 4, 1, 1, 'z', 2},
{6, 4, 3, 2, 'z', 4},
{10, 4, 6, 3, 'z', 7},
// replace first trailing byte with invalid byte
{3, 4, 1, 1, 0xFF, 2},
{6, 4, 3, 2, 0xFF, 4},
{10, 4, 6, 3, 0xFF, 7},
// replace second trailing byte with ASCII byte
{6, 4, 3, 2, 'z', 5},
{10, 4, 6, 3, 'z', 8},
// replace second trailing byte with invalid byte
{6, 4, 3, 2, 0xFF, 5},
{10, 4, 6, 3, 0xFF, 8},
// replace third trailing byte
{10, 4, 6, 3, 'z', 9},
{10, 4, 6, 3, 0xFF, 9},
// 2.1 The following test-cases raise doubt whether error or partial should
// be returned. For example, we have 4-byte sequence with valid leading
// byte. If we hide the last byte we need to return partial. But, if the
// second or third byte, which are visible to the call to codecvt, are
// malformed then error should be returned.
// replace first trailing byte with ASCII byte, also incomplete at end
{5, 4, 3, 2, 'z', 4},
{8, 4, 6, 3, 'z', 7},
{9, 4, 6, 3, 'z', 7},
// replace first trailing byte with invalid byte, also incomplete at end
{5, 4, 3, 2, 0xFF, 4},
{8, 4, 6, 3, 0xFF, 7},
{9, 4, 6, 3, 0xFF, 7},
// replace second trailing byte with ASCII byte, also incomplete at end
{9, 4, 6, 3, 'z', 8},
// replace second trailing byte with invalid byte, also incomplete at end
{9, 4, 6, 3, 0xFF, 8},
// 3. Surrogate CP. We modify the second byte (first trailing) of the 3-byte
// CP U+D700
{6, 4, 3, 2, 0b10100000, 4}, // turn U+D700 into U+D800
{6, 4, 3, 2, 0b10101100, 4}, // turn U+D700 into U+DB00
{6, 4, 3, 2, 0b10110000, 4}, // turn U+D700 into U+DC00
{6, 4, 3, 2, 0b10111100, 4}, // turn U+D700 into U+DF00
// 4. Overlong sequence. The CPs in the input are chosen such as modifying
// just the leading byte is enough to make them overlong, i.e. for the
// 3-byte and 4-byte CP the second byte (first trailing) has enough leading
// zeroes.
{3, 4, 1, 1, 0b11000000, 1}, // make the 2-byte CP overlong
{3, 4, 1, 1, 0b11000001, 1}, // make the 2-byte CP overlong
{6, 4, 3, 2, 0b11100000, 3}, // make the 3-byte CP overlong
{10, 4, 6, 3, 0b11110000, 6}, // make the 4-byte CP overlong
// 5. CP above range
// turn U+10AAAA into U+14AAAA by changing its leading byte
{10, 4, 6, 3, 0b11110101, 6},
// turn U+10AAAA into U+11AAAA by changing its 2nd byte
{10, 4, 6, 3, 0b10011010, 7},
};
for (auto t : offsets)
{
InternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto old_char = in[t.replace_pos];
in[t.replace_pos] = t.replace_char;
auto state = mbstate_t{};
auto in_next = (const ExternT *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.in (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.error);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<InternT>::compare (out, exp, t.expected_out_next)
== 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, t.out_size);
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.expected_in_next);
in[t.replace_pos] = old_char;
}
}
template <class InternT, class ExternT>
void
utf8_to_utf32_in (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
utf8_to_utf32_in_ok (cvt);
utf8_to_utf32_in_partial (cvt);
utf8_to_utf32_in_error (cvt);
}
template <class InternT, class ExternT>
void
utf32_to_utf8_out_ok (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
using namespace std;
// UTF-8 string of 1-byte CP, 2-byte CP, 3-byte CP and 4-byte CP
const char32_t input[] = U"b\u0448\uAAAA\U0010AAAA";
const unsigned char expected[] = "b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 5, "");
static_assert (array_size (expected) == 11, "");
InternT in[array_size (input)];
ExternT exp[array_size (expected)];
copy (begin (input), end (input), begin (in));
copy (begin (expected), end (expected), begin (exp));
VERIFY (char_traits<InternT>::length (in) == 4);
VERIFY (char_traits<ExternT>::length (exp) == 10);
test_offsets_ok offsets[] = {{0, 0}, {1, 1}, {2, 3}, {3, 6}, {4, 10}};
for (auto t : offsets)
{
ExternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
auto state = mbstate_t{};
auto in_next = (const InternT *) nullptr;
auto out_next = (ExternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.out (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.ok);
VERIFY (in_next == in + t.in_size);
VERIFY (out_next == out + t.out_size);
VERIFY (char_traits<ExternT>::compare (out, exp, t.out_size) == 0);
if (t.out_size < array_size (out))
VERIFY (out[t.out_size] == 0);
}
}
template <class InternT, class ExternT>
void
utf32_to_utf8_out_partial (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
using namespace std;
// UTF-8 string of 1-byte CP, 2-byte CP, 3-byte CP and 4-byte CP
const char32_t input[] = U"b\u0448\uAAAA\U0010AAAA";
const unsigned char expected[] = "b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 5, "");
static_assert (array_size (expected) == 11, "");
InternT in[array_size (input)];
ExternT exp[array_size (expected)];
copy (begin (input), end (input), begin (in));
copy (begin (expected), end (expected), begin (exp));
VERIFY (char_traits<InternT>::length (in) == 4);
VERIFY (char_traits<ExternT>::length (exp) == 10);
test_offsets_partial offsets[] = {
{1, 0, 0, 0}, // no space for first CP
{2, 1, 1, 1}, // no space for second CP
{2, 2, 1, 1}, // no space for second CP
{3, 3, 2, 3}, // no space for third CP
{3, 4, 2, 3}, // no space for third CP
{3, 5, 2, 3}, // no space for third CP
{4, 6, 3, 6}, // no space for fourth CP
{4, 7, 3, 6}, // no space for fourth CP
{4, 8, 3, 6}, // no space for fourth CP
{4, 9, 3, 6}, // no space for fourth CP
};
for (auto t : offsets)
{
ExternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto state = mbstate_t{};
auto in_next = (const InternT *) nullptr;
auto out_next = (ExternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.out (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.partial);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<ExternT>::compare (out, exp, t.expected_out_next)
== 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
}
}
template <class InternT, class ExternT>
void
utf32_to_utf8_out_error (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
using namespace std;
// UTF-8 string of 1-byte CP, 2-byte CP, 3-byte CP and 4-byte CP
const char32_t input[] = U"b\u0448\uAAAA\U0010AAAA";
const unsigned char expected[] = "b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 5, "");
static_assert (array_size (expected) == 11, "");
InternT in[array_size (input)];
ExternT exp[array_size (expected)];
copy (begin (input), end (input), begin (in));
copy (begin (expected), end (expected), begin (exp));
VERIFY (char_traits<InternT>::length (in) == 4);
VERIFY (char_traits<ExternT>::length (exp) == 10);
test_offsets_error<InternT> offsets[] = {
// Surrogate CP
{4, 10, 0, 0, 0xD800, 0},
{4, 10, 1, 1, 0xDBFF, 1},
{4, 10, 2, 3, 0xDC00, 2},
{4, 10, 3, 6, 0xDFFF, 3},
// CP out of range
{4, 10, 0, 0, 0x00110000, 0},
{4, 10, 1, 1, 0x00110000, 1},
{4, 10, 2, 3, 0x00110000, 2},
{4, 10, 3, 6, 0x00110000, 3}};
for (auto t : offsets)
{
ExternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto old_char = in[t.replace_pos];
in[t.replace_pos] = t.replace_char;
auto state = mbstate_t{};
auto in_next = (const InternT *) nullptr;
auto out_next = (ExternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.out (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.error);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<ExternT>::compare (out, exp, t.expected_out_next)
== 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
in[t.replace_pos] = old_char;
}
}
template <class InternT, class ExternT>
void
utf32_to_utf8_out (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
utf32_to_utf8_out_ok (cvt);
utf32_to_utf8_out_partial (cvt);
utf32_to_utf8_out_error (cvt);
}
template <class InternT, class ExternT>
void
test_utf8_utf32_cvt (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
utf8_to_utf32_in (cvt);
utf32_to_utf8_out (cvt);
}
template <class InternT, class ExternT>
void
utf8_to_utf16_in_ok (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
using namespace std;
// UTF-8 string of 1-byte CP, 2-byte CP, 3-byte CP and 4-byte CP
const unsigned char input[] = "b\u0448\uAAAA\U0010AAAA";
const char16_t expected[] = u"b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 11, "");
static_assert (array_size (expected) == 6, "");
ExternT in[array_size (input)];
InternT exp[array_size (expected)];
copy (begin (input), end (input), begin (in));
copy (begin (expected), end (expected), begin (exp));
VERIFY (char_traits<ExternT>::length (in) == 10);
VERIFY (char_traits<InternT>::length (exp) == 5);
test_offsets_ok offsets[] = {{0, 0}, {1, 1}, {3, 2}, {6, 3}, {10, 5}};
for (auto t : offsets)
{
InternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
auto state = mbstate_t{};
auto in_next = (const ExternT *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.in (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.ok);
VERIFY (in_next == in + t.in_size);
VERIFY (out_next == out + t.out_size);
VERIFY (char_traits<InternT>::compare (out, exp, t.out_size) == 0);
if (t.out_size < array_size (out))
VERIFY (out[t.out_size] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, t.out_size);
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.in_size);
}
for (auto t : offsets)
{
InternT out[array_size (exp)] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
auto state = mbstate_t{};
auto in_next = (const ExternT *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res
= cvt.in (state, in, in + t.in_size, in_next, out, end (out), out_next);
VERIFY (res == cvt.ok);
VERIFY (in_next == in + t.in_size);
VERIFY (out_next == out + t.out_size);
VERIFY (char_traits<InternT>::compare (out, exp, t.out_size) == 0);
if (t.out_size < array_size (out))
VERIFY (out[t.out_size] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, array_size (out));
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.in_size);
}
}
template <class InternT, class ExternT>
void
utf8_to_utf16_in_partial (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
using namespace std;
// UTF-8 string of 1-byte CP, 2-byte CP, 3-byte CP and 4-byte CP
const unsigned char input[] = "b\u0448\uAAAA\U0010AAAA";
const char16_t expected[] = u"b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 11, "");
static_assert (array_size (expected) == 6, "");
ExternT in[array_size (input)];
InternT exp[array_size (expected)];
copy (begin (input), end (input), begin (in));
copy (begin (expected), end (expected), begin (exp));
VERIFY (char_traits<ExternT>::length (in) == 10);
VERIFY (char_traits<InternT>::length (exp) == 5);
test_offsets_partial offsets[] = {
{1, 0, 0, 0}, // no space for first CP
{3, 1, 1, 1}, // no space for second CP
{2, 2, 1, 1}, // incomplete second CP
{2, 1, 1, 1}, // incomplete second CP, and no space for it
{6, 2, 3, 2}, // no space for third CP
{4, 3, 3, 2}, // incomplete third CP
{5, 3, 3, 2}, // incomplete third CP
{4, 2, 3, 2}, // incomplete third CP, and no space for it
{5, 2, 3, 2}, // incomplete third CP, and no space for it
{10, 3, 6, 3}, // no space for fourth CP
{10, 4, 6, 3}, // no space for fourth CP
{7, 5, 6, 3}, // incomplete fourth CP
{8, 5, 6, 3}, // incomplete fourth CP
{9, 5, 6, 3}, // incomplete fourth CP
{7, 3, 6, 3}, // incomplete fourth CP, and no space for it
{8, 3, 6, 3}, // incomplete fourth CP, and no space for it
{9, 3, 6, 3}, // incomplete fourth CP, and no space for it
{7, 4, 6, 3}, // incomplete fourth CP, and no space for it
{8, 4, 6, 3}, // incomplete fourth CP, and no space for it
{9, 4, 6, 3}, // incomplete fourth CP, and no space for it
};
for (auto t : offsets)
{
InternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto state = mbstate_t{};
auto in_next = (const ExternT *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.in (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.partial);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<InternT>::compare (out, exp, t.expected_out_next)
== 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, t.out_size);
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.expected_in_next);
}
}
template <class InternT, class ExternT>
void
utf8_to_utf16_in_error (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
using namespace std;
// UTF-8 string of 1-byte CP, 2-byte CP, 3-byte CP, 4-byte CP
const unsigned char input[] = "b\u0448\uD700\U0010AAAA";
const char16_t expected[] = u"b\u0448\uD700\U0010AAAA";
static_assert (array_size (input) == 11, "");
static_assert (array_size (expected) == 6, "");
ExternT in[array_size (input)];
InternT exp[array_size (expected)];
copy (begin (input), end (input), begin (in));
copy (begin (expected), end (expected), begin (exp));
VERIFY (char_traits<ExternT>::length (in) == 10);
VERIFY (char_traits<InternT>::length (exp) == 5);
// There are 5 classes of errors in UTF-8 decoding
// 1. Missing leading byte
// 2. Missing trailing byte
// 3. Surrogate CP
// 4. Overlong sequence
// 5. CP out of Unicode range
test_offsets_error<unsigned char> offsets[] = {
// 1. Missing leading byte. We will replace the leading byte with
// non-leading byte, such as a byte that is always invalid or a trailing
// byte.
// replace leading byte with invalid byte
{1, 5, 0, 0, 0xFF, 0},
{3, 5, 1, 1, 0xFF, 1},
{6, 5, 3, 2, 0xFF, 3},
{10, 5, 6, 3, 0xFF, 6},
// replace leading byte with trailing byte
{1, 5, 0, 0, 0b10101010, 0},
{3, 5, 1, 1, 0b10101010, 1},
{6, 5, 3, 2, 0b10101010, 3},
{10, 5, 6, 3, 0b10101010, 6},
// 2. Missing trailing byte. We will replace the trailing byte with
// non-trailing byte, such as a byte that is always invalid or a leading
// byte (simple ASCII byte in our case).
// replace first trailing byte with ASCII byte
{3, 5, 1, 1, 'z', 2},
{6, 5, 3, 2, 'z', 4},
{10, 5, 6, 3, 'z', 7},
// replace first trailing byte with invalid byte
{3, 5, 1, 1, 0xFF, 2},
{6, 5, 3, 2, 0xFF, 4},
{10, 5, 6, 3, 0xFF, 7},
// replace second trailing byte with ASCII byte
{6, 5, 3, 2, 'z', 5},
{10, 5, 6, 3, 'z', 8},
// replace second trailing byte with invalid byte
{6, 5, 3, 2, 0xFF, 5},
{10, 5, 6, 3, 0xFF, 8},
// replace third trailing byte
{10, 5, 6, 3, 'z', 9},
{10, 5, 6, 3, 0xFF, 9},
// 2.1 The following test-cases raise doubt whether error or partial should
// be returned. For example, we have 4-byte sequence with valid leading
// byte. If we hide the last byte we need to return partial. But, if the
// second or third byte, which are visible to the call to codecvt, are
// malformed then error should be returned.
// replace first trailing byte with ASCII byte, also incomplete at end
{5, 5, 3, 2, 'z', 4},
{8, 5, 6, 3, 'z', 7},
{9, 5, 6, 3, 'z', 7},
// replace first trailing byte with invalid byte, also incomplete at end
{5, 5, 3, 2, 0xFF, 4},
{8, 5, 6, 3, 0xFF, 7},
{9, 5, 6, 3, 0xFF, 7},
// replace second trailing byte with ASCII byte, also incomplete at end
{9, 5, 6, 3, 'z', 8},
// replace second trailing byte with invalid byte, also incomplete at end
{9, 5, 6, 3, 0xFF, 8},
// 3. Surrogate CP. We modify the second byte (first trailing) of the 3-byte
// CP U+D700
{6, 5, 3, 2, 0b10100000, 4}, // turn U+D700 into U+D800
{6, 5, 3, 2, 0b10101100, 4}, // turn U+D700 into U+DB00
{6, 5, 3, 2, 0b10110000, 4}, // turn U+D700 into U+DC00
{6, 5, 3, 2, 0b10111100, 4}, // turn U+D700 into U+DF00
// 4. Overlong sequence. The CPs in the input are chosen such as modifying
// just the leading byte is enough to make them overlong, i.e. for the
// 3-byte and 4-byte CP the second byte (first trailing) has enough leading
// zeroes.
{3, 5, 1, 1, 0b11000000, 1}, // make the 2-byte CP overlong
{3, 5, 1, 1, 0b11000001, 1}, // make the 2-byte CP overlong
{6, 5, 3, 2, 0b11100000, 3}, // make the 3-byte CP overlong
{10, 5, 6, 3, 0b11110000, 6}, // make the 4-byte CP overlong
// 5. CP above range
// turn U+10AAAA into U+14AAAA by changing its leading byte
{10, 5, 6, 3, 0b11110101, 6},
// turn U+10AAAA into U+11AAAA by changing its 2nd byte
{10, 5, 6, 3, 0b10011010, 7},
};
for (auto t : offsets)
{
InternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto old_char = in[t.replace_pos];
in[t.replace_pos] = t.replace_char;
auto state = mbstate_t{};
auto in_next = (const ExternT *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.in (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.error);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<InternT>::compare (out, exp, t.expected_out_next)
== 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, t.out_size);
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.expected_in_next);
in[t.replace_pos] = old_char;
}
}
template <class InternT, class ExternT>
void
utf8_to_utf16_in (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
utf8_to_utf16_in_ok (cvt);
utf8_to_utf16_in_partial (cvt);
utf8_to_utf16_in_error (cvt);
}
template <class InternT, class ExternT>
void
utf16_to_utf8_out_ok (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
using namespace std;
// UTF-8 string of 1-byte CP, 2-byte CP, 3-byte CP and 4-byte CP
const char16_t input[] = u"b\u0448\uAAAA\U0010AAAA";
const unsigned char expected[] = "b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 6, "");
static_assert (array_size (expected) == 11, "");
InternT in[array_size (input)];
ExternT exp[array_size (expected)];
copy (begin (input), end (input), begin (in));
copy (begin (expected), end (expected), begin (exp));
VERIFY (char_traits<InternT>::length (in) == 5);
VERIFY (char_traits<ExternT>::length (exp) == 10);
test_offsets_ok offsets[] = {{0, 0}, {1, 1}, {2, 3}, {3, 6}, {5, 10}};
for (auto t : offsets)
{
ExternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
auto state = mbstate_t{};
auto in_next = (const InternT *) nullptr;
auto out_next = (ExternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.out (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.ok);
VERIFY (in_next == in + t.in_size);
VERIFY (out_next == out + t.out_size);
VERIFY (char_traits<ExternT>::compare (out, exp, t.out_size) == 0);
if (t.out_size < array_size (out))
VERIFY (out[t.out_size] == 0);
}
}
template <class InternT, class ExternT>
void
utf16_to_utf8_out_partial (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
using namespace std;
// UTF-8 string of 1-byte CP, 2-byte CP, 3-byte CP and 4-byte CP
const char16_t input[] = u"b\u0448\uAAAA\U0010AAAA";
const unsigned char expected[] = "b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 6, "");
static_assert (array_size (expected) == 11, "");
InternT in[array_size (input)];
ExternT exp[array_size (expected)];
copy (begin (input), end (input), begin (in));
copy (begin (expected), end (expected), begin (exp));
VERIFY (char_traits<InternT>::length (in) == 5);
VERIFY (char_traits<ExternT>::length (exp) == 10);
test_offsets_partial offsets[] = {
{1, 0, 0, 0}, // no space for first CP
{2, 1, 1, 1}, // no space for second CP
{2, 2, 1, 1}, // no space for second CP
{3, 3, 2, 3}, // no space for third CP
{3, 4, 2, 3}, // no space for third CP
{3, 5, 2, 3}, // no space for third CP
{5, 6, 3, 6}, // no space for fourth CP
{5, 7, 3, 6}, // no space for fourth CP
{5, 8, 3, 6}, // no space for fourth CP
{5, 9, 3, 6}, // no space for fourth CP
{4, 10, 3, 6}, // incomplete fourth CP
{4, 6, 3, 6}, // incomplete fourth CP, and no space for it
{4, 7, 3, 6}, // incomplete fourth CP, and no space for it
{4, 8, 3, 6}, // incomplete fourth CP, and no space for it
{4, 9, 3, 6}, // incomplete fourth CP, and no space for it
};
for (auto t : offsets)
{
ExternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto state = mbstate_t{};
auto in_next = (const InternT *) nullptr;
auto out_next = (ExternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.out (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.partial);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<ExternT>::compare (out, exp, t.expected_out_next)
== 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
}
}
template <class InternT, class ExternT>
void
utf16_to_utf8_out_error (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
using namespace std;
// UTF-8 string of 1-byte CP, 2-byte CP, 3-byte CP and 4-byte CP
const char16_t input[] = u"b\u0448\uAAAA\U0010AAAA";
const unsigned char expected[] = "b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 6, "");
static_assert (array_size (expected) == 11, "");
InternT in[array_size (input)];
ExternT exp[array_size (expected)];
copy (begin (input), end (input), begin (in));
copy (begin (expected), end (expected), begin (exp));
VERIFY (char_traits<InternT>::length (in) == 5);
VERIFY (char_traits<ExternT>::length (exp) == 10);
// The only possible error in UTF-16 is unpaired surrogate code units.
// So we replace valid code points (scalar values) with lone surrogate CU.
test_offsets_error<InternT> offsets[] = {
{5, 10, 0, 0, 0xD800, 0},
{5, 10, 0, 0, 0xDBFF, 0},
{5, 10, 0, 0, 0xDC00, 0},
{5, 10, 0, 0, 0xDFFF, 0},
{5, 10, 1, 1, 0xD800, 1},
{5, 10, 1, 1, 0xDBFF, 1},
{5, 10, 1, 1, 0xDC00, 1},
{5, 10, 1, 1, 0xDFFF, 1},
{5, 10, 2, 3, 0xD800, 2},
{5, 10, 2, 3, 0xDBFF, 2},
{5, 10, 2, 3, 0xDC00, 2},
{5, 10, 2, 3, 0xDFFF, 2},
// make the leading surrogate a trailing one
{5, 10, 3, 6, 0xDC00, 3},
{5, 10, 3, 6, 0xDFFF, 3},
// make the trailing surrogate a leading one
{5, 10, 3, 6, 0xD800, 4},
{5, 10, 3, 6, 0xDBFF, 4},
// make the trailing surrogate a BMP char
{5, 10, 3, 6, u'z', 4},
};
for (auto t : offsets)
{
ExternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto old_char = in[t.replace_pos];
in[t.replace_pos] = t.replace_char;
auto state = mbstate_t{};
auto in_next = (const InternT *) nullptr;
auto out_next = (ExternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.out (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.error);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<ExternT>::compare (out, exp, t.expected_out_next)
== 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
in[t.replace_pos] = old_char;
}
}
template <class InternT, class ExternT>
void
utf16_to_utf8_out (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
utf16_to_utf8_out_ok (cvt);
utf16_to_utf8_out_partial (cvt);
utf16_to_utf8_out_error (cvt);
}
template <class InternT, class ExternT>
void
test_utf8_utf16_cvt (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
utf8_to_utf16_in (cvt);
utf16_to_utf8_out (cvt);
}
template <class InternT, class ExternT>
void
utf8_to_ucs2_in_ok (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
using namespace std;
// UTF-8 string of 1-byte CP, 2-byte CP and 3-byte CP
const unsigned char input[] = "b\u0448\uAAAA";
const char16_t expected[] = u"b\u0448\uAAAA";
static_assert (array_size (input) == 7, "");
static_assert (array_size (expected) == 4, "");
ExternT in[array_size (input)];
InternT exp[array_size (expected)];
copy (begin (input), end (input), begin (in));
copy (begin (expected), end (expected), begin (exp));
VERIFY (char_traits<ExternT>::length (in) == 6);
VERIFY (char_traits<InternT>::length (exp) == 3);
test_offsets_ok offsets[] = {{0, 0}, {1, 1}, {3, 2}, {6, 3}};
for (auto t : offsets)
{
InternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
auto state = mbstate_t{};
auto in_next = (const ExternT *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.in (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.ok);
VERIFY (in_next == in + t.in_size);
VERIFY (out_next == out + t.out_size);
VERIFY (char_traits<InternT>::compare (out, exp, t.out_size) == 0);
if (t.out_size < array_size (out))
VERIFY (out[t.out_size] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, t.out_size);
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.in_size);
}
for (auto t : offsets)
{
InternT out[array_size (exp)] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
auto state = mbstate_t{};
auto in_next = (const ExternT *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res
= cvt.in (state, in, in + t.in_size, in_next, out, end (out), out_next);
VERIFY (res == cvt.ok);
VERIFY (in_next == in + t.in_size);
VERIFY (out_next == out + t.out_size);
VERIFY (char_traits<InternT>::compare (out, exp, t.out_size) == 0);
if (t.out_size < array_size (out))
VERIFY (out[t.out_size] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, array_size (out));
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.in_size);
}
}
template <class InternT, class ExternT>
void
utf8_to_ucs2_in_partial (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
using namespace std;
// UTF-8 string of 1-byte CP, 2-byte CP and 3-byte CP
const unsigned char input[] = "b\u0448\uAAAA";
const char16_t expected[] = u"b\u0448\uAAAA";
static_assert (array_size (input) == 7, "");
static_assert (array_size (expected) == 4, "");
ExternT in[array_size (input)];
InternT exp[array_size (expected)];
copy (begin (input), end (input), begin (in));
copy (begin (expected), end (expected), begin (exp));
VERIFY (char_traits<ExternT>::length (in) == 6);
VERIFY (char_traits<InternT>::length (exp) == 3);
test_offsets_partial offsets[] = {
{1, 0, 0, 0}, // no space for first CP
{3, 1, 1, 1}, // no space for second CP
{2, 2, 1, 1}, // incomplete second CP
{2, 1, 1, 1}, // incomplete second CP, and no space for it
{6, 2, 3, 2}, // no space for third CP
{4, 3, 3, 2}, // incomplete third CP
{5, 3, 3, 2}, // incomplete third CP
{4, 2, 3, 2}, // incomplete third CP, and no space for it
{5, 2, 3, 2}, // incomplete third CP, and no space for it
};
for (auto t : offsets)
{
InternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto state = mbstate_t{};
auto in_next = (const ExternT *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.in (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.partial);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<InternT>::compare (out, exp, t.expected_out_next)
== 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, t.out_size);
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.expected_in_next);
}
}
template <class InternT, class ExternT>
void
utf8_to_ucs2_in_error (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
using namespace std;
const unsigned char input[] = "b\u0448\uD700\U0010AAAA";
const char16_t expected[] = u"b\u0448\uD700\U0010AAAA";
static_assert (array_size (input) == 11, "");
static_assert (array_size (expected) == 6, "");
ExternT in[array_size (input)];
InternT exp[array_size (expected)];
copy (begin (input), end (input), begin (in));
copy (begin (expected), end (expected), begin (exp));
VERIFY (char_traits<ExternT>::length (in) == 10);
VERIFY (char_traits<InternT>::length (exp) == 5);
// There are 5 classes of errors in UTF-8 decoding
// 1. Missing leading byte
// 2. Missing trailing byte
// 3. Surrogate CP
// 4. Overlong sequence
// 5. CP out of Unicode range
test_offsets_error<unsigned char> offsets[] = {
// 1. Missing leading byte. We will replace the leading byte with
// non-leading byte, such as a byte that is always invalid or a trailing
// byte.
// replace leading byte with invalid byte
{1, 5, 0, 0, 0xFF, 0},
{3, 5, 1, 1, 0xFF, 1},
{6, 5, 3, 2, 0xFF, 3},
{10, 5, 6, 3, 0xFF, 6},
// replace leading byte with trailing byte
{1, 5, 0, 0, 0b10101010, 0},
{3, 5, 1, 1, 0b10101010, 1},
{6, 5, 3, 2, 0b10101010, 3},
{10, 5, 6, 3, 0b10101010, 6},
// 2. Missing trailing byte. We will replace the trailing byte with
// non-trailing byte, such as a byte that is always invalid or a leading
// byte (simple ASCII byte in our case).
// replace first trailing byte with ASCII byte
{3, 5, 1, 1, 'z', 2},
{6, 5, 3, 2, 'z', 4},
{10, 5, 6, 3, 'z', 7},
// replace first trailing byte with invalid byte
{3, 5, 1, 1, 0xFF, 2},
{6, 5, 3, 2, 0xFF, 4},
{10, 5, 6, 3, 0xFF, 7},
// replace second trailing byte with ASCII byte
{6, 5, 3, 2, 'z', 5},
{10, 5, 6, 3, 'z', 8},
// replace second trailing byte with invalid byte
{6, 5, 3, 2, 0xFF, 5},
{10, 5, 6, 3, 0xFF, 8},
// replace third trailing byte
{10, 5, 6, 3, 'z', 9},
{10, 5, 6, 3, 0xFF, 9},
// 2.1 The following test-cases raise doubt whether error or partial should
// be returned. For example, we have 4-byte sequence with valid leading
// byte. If we hide the last byte we need to return partial. But, if the
// second or third byte, which are visible to the call to codecvt, are
// malformed then error should be returned.
// replace first trailing byte with ASCII byte, also incomplete at end
{5, 5, 3, 2, 'z', 4},
{8, 5, 6, 3, 'z', 7},
{9, 5, 6, 3, 'z', 7},
// replace first trailing byte with invalid byte, also incomplete at end
{5, 5, 3, 2, 0xFF, 4},
{8, 5, 6, 3, 0xFF, 7},
{9, 5, 6, 3, 0xFF, 7},
// replace second trailing byte with ASCII byte, also incomplete at end
{9, 5, 6, 3, 'z', 8},
// replace second trailing byte with invalid byte, also incomplete at end
{9, 5, 6, 3, 0xFF, 8},
// 3. Surrogate CP. We modify the second byte (first trailing) of the 3-byte
// CP U+D700
{6, 5, 3, 2, 0b10100000, 4}, // turn U+D700 into U+D800
{6, 5, 3, 2, 0b10101100, 4}, // turn U+D700 into U+DB00
{6, 5, 3, 2, 0b10110000, 4}, // turn U+D700 into U+DC00
{6, 5, 3, 2, 0b10111100, 4}, // turn U+D700 into U+DF00
// 4. Overlong sequence. The CPs in the input are chosen such as modifying
// just the leading byte is enough to make them overlong, i.e. for the
// 3-byte and 4-byte CP the second byte (first trailing) has enough leading
// zeroes.
{3, 5, 1, 1, 0b11000000, 1}, // make the 2-byte CP overlong
{3, 5, 1, 1, 0b11000001, 1}, // make the 2-byte CP overlong
{6, 5, 3, 2, 0b11100000, 3}, // make the 3-byte CP overlong
{10, 5, 6, 3, 0b11110000, 6}, // make the 4-byte CP overlong
// 5. CP above range
// turn U+10AAAA into U+14AAAA by changing its leading byte
{10, 5, 6, 3, 0b11110101, 6},
// turn U+10AAAA into U+11AAAA by changing its 2nd byte
{10, 5, 6, 3, 0b10011010, 7},
// Don't replace anything, show full 4-byte CP U+10AAAA
{10, 4, 6, 3, 'b', 0},
{10, 5, 6, 3, 'b', 0},
// Don't replace anything, show incomplete 4-byte CP at the end. It's still
// out of UCS2 range just by seeing the first byte.
{7, 4, 6, 3, 'b', 0}, // incomplete fourth CP
{8, 4, 6, 3, 'b', 0}, // incomplete fourth CP
{9, 4, 6, 3, 'b', 0}, // incomplete fourth CP
{7, 5, 6, 3, 'b', 0}, // incomplete fourth CP
{8, 5, 6, 3, 'b', 0}, // incomplete fourth CP
{9, 5, 6, 3, 'b', 0}, // incomplete fourth CP
};
for (auto t : offsets)
{
InternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto old_char = in[t.replace_pos];
in[t.replace_pos] = t.replace_char;
auto state = mbstate_t{};
auto in_next = (const ExternT *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.in (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.error);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<InternT>::compare (out, exp, t.expected_out_next)
== 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, t.out_size);
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.expected_in_next);
in[t.replace_pos] = old_char;
}
}
template <class InternT, class ExternT>
void
utf8_to_ucs2_in (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
utf8_to_ucs2_in_ok (cvt);
utf8_to_ucs2_in_partial (cvt);
utf8_to_ucs2_in_error (cvt);
}
template <class InternT, class ExternT>
void
ucs2_to_utf8_out_ok (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
using namespace std;
// UTF-8 string of 1-byte CP, 2-byte CP and 3-byte CP
const char16_t input[] = u"b\u0448\uAAAA";
const unsigned char expected[] = "b\u0448\uAAAA";
static_assert (array_size (input) == 4, "");
static_assert (array_size (expected) == 7, "");
InternT in[array_size (input)];
ExternT exp[array_size (expected)];
copy (begin (input), end (input), begin (in));
copy (begin (expected), end (expected), begin (exp));
VERIFY (char_traits<InternT>::length (in) == 3);
VERIFY (char_traits<ExternT>::length (exp) == 6);
test_offsets_ok offsets[] = {{0, 0}, {1, 1}, {2, 3}, {3, 6}};
for (auto t : offsets)
{
ExternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
auto state = mbstate_t{};
auto in_next = (const InternT *) nullptr;
auto out_next = (ExternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.out (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.ok);
VERIFY (in_next == in + t.in_size);
VERIFY (out_next == out + t.out_size);
VERIFY (char_traits<ExternT>::compare (out, exp, t.out_size) == 0);
if (t.out_size < array_size (out))
VERIFY (out[t.out_size] == 0);
}
}
template <class InternT, class ExternT>
void
ucs2_to_utf8_out_partial (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
using namespace std;
// UTF-8 string of 1-byte CP, 2-byte CP and 3-byte CP
const char16_t input[] = u"b\u0448\uAAAA";
const unsigned char expected[] = "b\u0448\uAAAA";
static_assert (array_size (input) == 4, "");
static_assert (array_size (expected) == 7, "");
InternT in[array_size (input)];
ExternT exp[array_size (expected)];
copy (begin (input), end (input), begin (in));
copy (begin (expected), end (expected), begin (exp));
VERIFY (char_traits<InternT>::length (in) == 3);
VERIFY (char_traits<ExternT>::length (exp) == 6);
test_offsets_partial offsets[] = {
{1, 0, 0, 0}, // no space for first CP
{2, 1, 1, 1}, // no space for second CP
{2, 2, 1, 1}, // no space for second CP
{3, 3, 2, 3}, // no space for third CP
{3, 4, 2, 3}, // no space for third CP
{3, 5, 2, 3}, // no space for third CP
};
for (auto t : offsets)
{
ExternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto state = mbstate_t{};
auto in_next = (const InternT *) nullptr;
auto out_next = (ExternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.out (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.partial);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<ExternT>::compare (out, exp, t.expected_out_next)
== 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
}
}
template <class InternT, class ExternT>
void
ucs2_to_utf8_out_error (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
using namespace std;
const char16_t input[] = u"b\u0448\uAAAA\U0010AAAA";
const unsigned char expected[] = "b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 6, "");
static_assert (array_size (expected) == 11, "");
InternT in[array_size (input)];
ExternT exp[array_size (expected)];
copy (begin (input), end (input), begin (in));
copy (begin (expected), end (expected), begin (exp));
VERIFY (char_traits<InternT>::length (in) == 5);
VERIFY (char_traits<ExternT>::length (exp) == 10);
test_offsets_error<InternT> offsets[] = {
{3, 6, 0, 0, 0xD800, 0},
{3, 6, 0, 0, 0xDBFF, 0},
{3, 6, 0, 0, 0xDC00, 0},
{3, 6, 0, 0, 0xDFFF, 0},
{3, 6, 1, 1, 0xD800, 1},
{3, 6, 1, 1, 0xDBFF, 1},
{3, 6, 1, 1, 0xDC00, 1},
{3, 6, 1, 1, 0xDFFF, 1},
{3, 6, 2, 3, 0xD800, 2},
{3, 6, 2, 3, 0xDBFF, 2},
{3, 6, 2, 3, 0xDC00, 2},
{3, 6, 2, 3, 0xDFFF, 2},
// make the leading surrogate a trailing one
{5, 10, 3, 6, 0xDC00, 3},
{5, 10, 3, 6, 0xDFFF, 3},
// make the trailing surrogate a leading one
{5, 10, 3, 6, 0xD800, 4},
{5, 10, 3, 6, 0xDBFF, 4},
// make the trailing surrogate a BMP char
{5, 10, 3, 6, u'z', 4},
// don't replace anything in the test cases bellow, just show the surrogate
// pair (fourth CP) fully or partially
{5, 10, 3, 6, u'b', 0},
{5, 7, 3, 6, u'b', 0}, // no space for fourth CP
{5, 8, 3, 6, u'b', 0}, // no space for fourth CP
{5, 9, 3, 6, u'b', 0}, // no space for fourth CP
{4, 10, 3, 6, u'b', 0}, // incomplete fourth CP
{4, 7, 3, 6, u'b', 0}, // incomplete fourth CP, and no space for it
{4, 8, 3, 6, u'b', 0}, // incomplete fourth CP, and no space for it
{4, 9, 3, 6, u'b', 0}, // incomplete fourth CP, and no space for it
};
for (auto t : offsets)
{
ExternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto old_char = in[t.replace_pos];
in[t.replace_pos] = t.replace_char;
auto state = mbstate_t{};
auto in_next = (const InternT *) nullptr;
auto out_next = (ExternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.out (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.error);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<ExternT>::compare (out, exp, t.expected_out_next)
== 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
in[t.replace_pos] = old_char;
}
}
template <class InternT, class ExternT>
void
ucs2_to_utf8_out (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
ucs2_to_utf8_out_ok (cvt);
ucs2_to_utf8_out_partial (cvt);
ucs2_to_utf8_out_error (cvt);
}
template <class InternT, class ExternT>
void
test_utf8_ucs2_cvt (const std::codecvt<InternT, ExternT, mbstate_t> &cvt)
{
utf8_to_ucs2_in (cvt);
ucs2_to_utf8_out (cvt);
}
enum utf16_endianess
{
utf16_big_endian,
utf16_little_endian
};
template <class Iter1, class Iter2>
Iter2
utf16_to_bytes (Iter1 f, Iter1 l, Iter2 o, utf16_endianess e)
{
if (e == utf16_big_endian)
for (; f != l; ++f)
{
*o++ = (*f >> 8) & 0xFF;
*o++ = *f & 0xFF;
}
else
for (; f != l; ++f)
{
*o++ = *f & 0xFF;
*o++ = (*f >> 8) & 0xFF;
}
return o;
}
template <class InternT>
void
utf16_to_utf32_in_ok (const std::codecvt<InternT, char, mbstate_t> &cvt,
utf16_endianess endianess)
{
using namespace std;
const char16_t input[] = u"b\u0448\uAAAA\U0010AAAA";
const char32_t expected[] = U"b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 6, "");
static_assert (array_size (expected) == 5, "");
char in[array_size (input) * 2];
InternT exp[array_size (expected)];
utf16_to_bytes (begin (input), end (input), begin (in), endianess);
copy (begin (expected), end (expected), begin (exp));
test_offsets_ok offsets[] = {{0, 0}, {2, 1}, {4, 2}, {6, 3}, {10, 4}};
for (auto t : offsets)
{
InternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
auto state = mbstate_t{};
auto in_next = (const char *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.in (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.ok);
VERIFY (in_next == in + t.in_size);
VERIFY (out_next == out + t.out_size);
VERIFY (char_traits<InternT>::compare (out, exp, t.out_size) == 0);
if (t.out_size < array_size (out))
VERIFY (out[t.out_size] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, t.out_size);
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.in_size);
}
for (auto t : offsets)
{
InternT out[array_size (exp)] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
auto state = mbstate_t{};
auto in_next = (const char *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res
= cvt.in (state, in, in + t.in_size, in_next, out, end (out), out_next);
VERIFY (res == cvt.ok);
VERIFY (in_next == in + t.in_size);
VERIFY (out_next == out + t.out_size);
VERIFY (char_traits<InternT>::compare (out, exp, t.out_size) == 0);
if (t.out_size < array_size (out))
VERIFY (out[t.out_size] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, array_size (out));
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.in_size);
}
}
template <class InternT>
void
utf16_to_utf32_in_partial (const std::codecvt<InternT, char, mbstate_t> &cvt,
utf16_endianess endianess)
{
using namespace std;
const char16_t input[] = u"b\u0448\uAAAA\U0010AAAA";
const char32_t expected[] = U"b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 6, "");
static_assert (array_size (expected) == 5, "");
char in[array_size (input) * 2];
InternT exp[array_size (expected)];
utf16_to_bytes (begin (input), end (input), begin (in), endianess);
copy (begin (expected), end (expected), begin (exp));
test_offsets_partial offsets[] = {
{2, 0, 0, 0}, // no space for first CP
{1, 1, 0, 0}, // incomplete first CP
{1, 0, 0, 0}, // incomplete first CP, and no space for it
{4, 1, 2, 1}, // no space for second CP
{3, 2, 2, 1}, // incomplete second CP
{3, 1, 2, 1}, // incomplete second CP, and no space for it
{6, 2, 4, 2}, // no space for third CP
{5, 3, 4, 2}, // incomplete third CP
{5, 2, 4, 2}, // incomplete third CP, and no space for it
{10, 3, 6, 3}, // no space for fourth CP
{7, 4, 6, 3}, // incomplete fourth CP
{8, 4, 6, 3}, // incomplete fourth CP
{9, 4, 6, 3}, // incomplete fourth CP
{7, 3, 6, 3}, // incomplete fourth CP, and no space for it
{8, 3, 6, 3}, // incomplete fourth CP, and no space for it
{9, 3, 6, 3}, // incomplete fourth CP, and no space for it
};
for (auto t : offsets)
{
InternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto state = mbstate_t{};
auto in_next = (const char *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.in (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.partial);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<InternT>::compare (out, exp, t.expected_out_next)
== 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, t.out_size);
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.expected_in_next);
}
}
template <class InternT>
void
utf16_to_utf32_in_error (const std::codecvt<InternT, char, mbstate_t> &cvt,
utf16_endianess endianess)
{
using namespace std;
char16_t input[] = u"b\u0448\uAAAA\U0010AAAA";
const char32_t expected[] = U"b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 6, "");
static_assert (array_size (expected) == 5, "");
InternT exp[array_size (expected)];
copy (begin (expected), end (expected), begin (exp));
// The only possible error in UTF-16 is unpaired surrogate code units.
// So we replace valid code points (scalar values) with lone surrogate CU.
test_offsets_error<char16_t> offsets[] = {
{10, 4, 0, 0, 0xD800, 0},
{10, 4, 0, 0, 0xDBFF, 0},
{10, 4, 0, 0, 0xDC00, 0},
{10, 4, 0, 0, 0xDFFF, 0},
{10, 4, 2, 1, 0xD800, 1},
{10, 4, 2, 1, 0xDBFF, 1},
{10, 4, 2, 1, 0xDC00, 1},
{10, 4, 2, 1, 0xDFFF, 1},
{10, 4, 4, 2, 0xD800, 2},
{10, 4, 4, 2, 0xDBFF, 2},
{10, 4, 4, 2, 0xDC00, 2},
{10, 4, 4, 2, 0xDFFF, 2},
// make the leading surrogate a trailing one
{10, 4, 6, 3, 0xDC00, 3},
{10, 4, 6, 3, 0xDFFF, 3},
// make the trailing surrogate a leading one
{10, 4, 6, 3, 0xD800, 4},
{10, 4, 6, 3, 0xDBFF, 4},
// make the trailing surrogate a BMP char
{10, 4, 6, 3, u'z', 4},
};
for (auto t : offsets)
{
char in[array_size (input) * 2];
InternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto old_char = input[t.replace_pos];
input[t.replace_pos] = t.replace_char; // replace in input, not in in
utf16_to_bytes (begin (input), end (input), begin (in), endianess);
auto state = mbstate_t{};
auto in_next = (const char *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.in (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.error);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<InternT>::compare (out, exp, t.expected_out_next)
== 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, t.out_size);
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.expected_in_next);
input[t.replace_pos] = old_char;
}
}
template <class InternT>
void
utf32_to_utf16_out_ok (const std::codecvt<InternT, char, mbstate_t> &cvt,
utf16_endianess endianess)
{
using namespace std;
const char32_t input[] = U"b\u0448\uAAAA\U0010AAAA";
const char16_t expected[] = u"b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 5, "");
static_assert (array_size (expected) == 6, "");
InternT in[array_size (input)];
char exp[array_size (expected) * 2];
copy (begin (input), end (input), begin (in));
utf16_to_bytes (begin (expected), end (expected), begin (exp), endianess);
test_offsets_ok offsets[] = {{0, 0}, {1, 2}, {2, 4}, {3, 6}, {4, 10}};
for (auto t : offsets)
{
char out[array_size (exp) - 2] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
auto state = mbstate_t{};
auto in_next = (const InternT *) nullptr;
auto out_next = (char *) nullptr;
auto res = codecvt_base::result ();
res = cvt.out (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.ok);
VERIFY (in_next == in + t.in_size);
VERIFY (out_next == out + t.out_size);
VERIFY (char_traits<char>::compare (out, exp, t.out_size) == 0);
if (t.out_size < array_size (out))
VERIFY (out[t.out_size] == 0);
}
}
template <class InternT>
void
utf32_to_utf16_out_partial (const std::codecvt<InternT, char, mbstate_t> &cvt,
utf16_endianess endianess)
{
using namespace std;
const char32_t input[] = U"b\u0448\uAAAA\U0010AAAA";
const char16_t expected[] = u"b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 5, "");
static_assert (array_size (expected) == 6, "");
InternT in[array_size (input)];
char exp[array_size (expected) * 2];
copy (begin (input), end (input), begin (in));
utf16_to_bytes (begin (expected), end (expected), begin (exp), endianess);
test_offsets_partial offsets[] = {
{1, 0, 0, 0}, // no space for first CP
{1, 1, 0, 0}, // no space for first CP
{2, 2, 1, 2}, // no space for second CP
{2, 3, 1, 2}, // no space for second CP
{3, 4, 2, 4}, // no space for third CP
{3, 5, 2, 4}, // no space for third CP
{4, 6, 3, 6}, // no space for fourth CP
{4, 7, 3, 6}, // no space for fourth CP
{4, 8, 3, 6}, // no space for fourth CP
{4, 9, 3, 6}, // no space for fourth CP
};
for (auto t : offsets)
{
char out[array_size (exp) - 2] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto state = mbstate_t{};
auto in_next = (const InternT *) nullptr;
auto out_next = (char *) nullptr;
auto res = codecvt_base::result ();
res = cvt.out (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.partial);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<char>::compare (out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
}
}
template <class InternT>
void
utf32_to_utf16_out_error (const std::codecvt<InternT, char, mbstate_t> &cvt,
utf16_endianess endianess)
{
using namespace std;
const char32_t input[] = U"b\u0448\uAAAA\U0010AAAA";
const char16_t expected[] = u"b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 5, "");
static_assert (array_size (expected) == 6, "");
InternT in[array_size (input)];
char exp[array_size (expected) * 2];
copy (begin (input), end (input), begin (in));
utf16_to_bytes (begin (expected), end (expected), begin (exp), endianess);
test_offsets_error<InternT> offsets[] = {
// Surrogate CP
{4, 10, 0, 0, 0xD800, 0},
{4, 10, 1, 2, 0xDBFF, 1},
{4, 10, 2, 4, 0xDC00, 2},
{4, 10, 3, 6, 0xDFFF, 3},
// CP out of range
{4, 10, 0, 0, 0x00110000, 0},
{4, 10, 1, 2, 0x00110000, 1},
{4, 10, 2, 4, 0x00110000, 2},
{4, 10, 3, 6, 0x00110000, 3}};
for (auto t : offsets)
{
char out[array_size (exp) - 2] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto old_char = in[t.replace_pos];
in[t.replace_pos] = t.replace_char;
auto state = mbstate_t{};
auto in_next = (const InternT *) nullptr;
auto out_next = (char *) nullptr;
auto res = codecvt_base::result ();
res = cvt.out (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.error);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<char>::compare (out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
in[t.replace_pos] = old_char;
}
}
template <class InternT>
void
test_utf16_utf32_cvt (const std::codecvt<InternT, char, mbstate_t> &cvt,
utf16_endianess endianess)
{
utf16_to_utf32_in_ok (cvt, endianess);
utf16_to_utf32_in_partial (cvt, endianess);
utf16_to_utf32_in_error (cvt, endianess);
utf32_to_utf16_out_ok (cvt, endianess);
utf32_to_utf16_out_partial (cvt, endianess);
utf32_to_utf16_out_error (cvt, endianess);
}
template <class InternT>
void
utf16_to_ucs2_in_ok (const std::codecvt<InternT, char, mbstate_t> &cvt,
utf16_endianess endianess)
{
using namespace std;
const char16_t input[] = u"b\u0448\uAAAA";
const char16_t expected[] = u"b\u0448\uAAAA";
static_assert (array_size (input) == 4, "");
static_assert (array_size (expected) == 4, "");
char in[array_size (input) * 2];
InternT exp[array_size (expected)];
utf16_to_bytes (begin (input), end (input), begin (in), endianess);
copy (begin (expected), end (expected), begin (exp));
test_offsets_ok offsets[] = {{0, 0}, {2, 1}, {4, 2}, {6, 3}};
for (auto t : offsets)
{
InternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
auto state = mbstate_t{};
auto in_next = (const char *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.in (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.ok);
VERIFY (in_next == in + t.in_size);
VERIFY (out_next == out + t.out_size);
VERIFY (char_traits<InternT>::compare (out, exp, t.out_size) == 0);
if (t.out_size < array_size (out))
VERIFY (out[t.out_size] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, t.out_size);
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.in_size);
}
for (auto t : offsets)
{
InternT out[array_size (exp)] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
auto state = mbstate_t{};
auto in_next = (const char *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res
= cvt.in (state, in, in + t.in_size, in_next, out, end (out), out_next);
VERIFY (res == cvt.ok);
VERIFY (in_next == in + t.in_size);
VERIFY (out_next == out + t.out_size);
VERIFY (char_traits<InternT>::compare (out, exp, t.out_size) == 0);
if (t.out_size < array_size (out))
VERIFY (out[t.out_size] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, array_size (out));
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.in_size);
}
}
template <class InternT>
void
utf16_to_ucs2_in_partial (const std::codecvt<InternT, char, mbstate_t> &cvt,
utf16_endianess endianess)
{
using namespace std;
const char16_t input[] = u"b\u0448\uAAAA";
const char16_t expected[] = u"b\u0448\uAAAA";
static_assert (array_size (input) == 4, "");
static_assert (array_size (expected) == 4, "");
char in[array_size (input) * 2];
InternT exp[array_size (expected)];
utf16_to_bytes (begin (input), end (input), begin (in), endianess);
copy (begin (expected), end (expected), begin (exp));
test_offsets_partial offsets[] = {
{2, 0, 0, 0}, // no space for first CP
{1, 1, 0, 0}, // incomplete first CP
{1, 0, 0, 0}, // incomplete first CP, and no space for it
{4, 1, 2, 1}, // no space for second CP
{3, 2, 2, 1}, // incomplete second CP
{3, 1, 2, 1}, // incomplete second CP, and no space for it
{6, 2, 4, 2}, // no space for third CP
{5, 3, 4, 2}, // incomplete third CP
{5, 2, 4, 2}, // incomplete third CP, and no space for it
};
for (auto t : offsets)
{
InternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto state = mbstate_t{};
auto in_next = (const char *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.in (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.partial);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<InternT>::compare (out, exp, t.expected_out_next)
== 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, t.out_size);
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.expected_in_next);
}
}
template <class InternT>
void
utf16_to_ucs2_in_error (const std::codecvt<InternT, char, mbstate_t> &cvt,
utf16_endianess endianess)
{
using namespace std;
char16_t input[] = u"b\u0448\uAAAA\U0010AAAA";
const char16_t expected[] = u"b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 6, "");
static_assert (array_size (expected) == 6, "");
InternT exp[array_size (expected)];
copy (begin (expected), end (expected), begin (exp));
// The only possible error in UTF-16 is unpaired surrogate code units.
// Additionally, because the target encoding is UCS-2, a proper pair of
// surrogates is also error. Simply, any surrogate CU is error.
test_offsets_error<char16_t> offsets[] = {
{6, 3, 0, 0, 0xD800, 0},
{6, 3, 0, 0, 0xDBFF, 0},
{6, 3, 0, 0, 0xDC00, 0},
{6, 3, 0, 0, 0xDFFF, 0},
{6, 3, 2, 1, 0xD800, 1},
{6, 3, 2, 1, 0xDBFF, 1},
{6, 3, 2, 1, 0xDC00, 1},
{6, 3, 2, 1, 0xDFFF, 1},
{6, 3, 4, 2, 0xD800, 2},
{6, 3, 4, 2, 0xDBFF, 2},
{6, 3, 4, 2, 0xDC00, 2},
{6, 3, 4, 2, 0xDFFF, 2},
// make the leading surrogate a trailing one
{10, 5, 6, 3, 0xDC00, 3},
{10, 5, 6, 3, 0xDFFF, 3},
// make the trailing surrogate a leading one
{10, 5, 6, 3, 0xD800, 4},
{10, 5, 6, 3, 0xDBFF, 4},
// make the trailing surrogate a BMP char
{10, 5, 6, 3, u'z', 4},
// don't replace anything in the test cases bellow, just show the surrogate
// pair (fourth CP) fully or partially (just the first surrogate)
{10, 5, 6, 3, u'b', 0},
{8, 5, 6, 3, u'b', 0},
{9, 5, 6, 3, u'b', 0},
{10, 4, 6, 3, u'b', 0},
{8, 4, 6, 3, u'b', 0},
{9, 4, 6, 3, u'b', 0},
};
for (auto t : offsets)
{
char in[array_size (input) * 2];
InternT out[array_size (exp) - 1] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto old_char = input[t.replace_pos];
input[t.replace_pos] = t.replace_char; // replace in input, not in in
utf16_to_bytes (begin (input), end (input), begin (in), endianess);
auto state = mbstate_t{};
auto in_next = (const char *) nullptr;
auto out_next = (InternT *) nullptr;
auto res = codecvt_base::result ();
res = cvt.in (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.error);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<InternT>::compare (out, exp, t.expected_out_next)
== 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
state = {};
auto len = cvt.length (state, in, in + t.in_size, t.out_size);
VERIFY (len >= 0);
VERIFY (static_cast<size_t> (len) == t.expected_in_next);
input[t.replace_pos] = old_char;
}
}
template <class InternT>
void
ucs2_to_utf16_out_ok (const std::codecvt<InternT, char, mbstate_t> &cvt,
utf16_endianess endianess)
{
using namespace std;
const char16_t input[] = u"b\u0448\uAAAA";
const char16_t expected[] = u"b\u0448\uAAAA";
static_assert (array_size (input) == 4, "");
static_assert (array_size (expected) == 4, "");
InternT in[array_size (input)];
char exp[array_size (expected) * 2];
copy (begin (input), end (input), begin (in));
utf16_to_bytes (begin (expected), end (expected), begin (exp), endianess);
test_offsets_ok offsets[] = {{0, 0}, {1, 2}, {2, 4}, {3, 6}};
for (auto t : offsets)
{
char out[array_size (exp) - 2] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
auto state = mbstate_t{};
auto in_next = (const InternT *) nullptr;
auto out_next = (char *) nullptr;
auto res = codecvt_base::result ();
res = cvt.out (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.ok);
VERIFY (in_next == in + t.in_size);
VERIFY (out_next == out + t.out_size);
VERIFY (char_traits<char>::compare (out, exp, t.out_size) == 0);
if (t.out_size < array_size (out))
VERIFY (out[t.out_size] == 0);
}
}
template <class InternT>
void
ucs2_to_utf16_out_partial (const std::codecvt<InternT, char, mbstate_t> &cvt,
utf16_endianess endianess)
{
using namespace std;
const char16_t input[] = u"b\u0448\uAAAA";
const char16_t expected[] = u"b\u0448\uAAAA";
static_assert (array_size (input) == 4, "");
static_assert (array_size (expected) == 4, "");
InternT in[array_size (input)];
char exp[array_size (expected) * 2];
copy (begin (input), end (input), begin (in));
utf16_to_bytes (begin (expected), end (expected), begin (exp), endianess);
test_offsets_partial offsets[] = {
{1, 0, 0, 0}, // no space for first CP
{1, 1, 0, 0}, // no space for first CP
{2, 2, 1, 2}, // no space for second CP
{2, 3, 1, 2}, // no space for second CP
{3, 4, 2, 4}, // no space for third CP
{3, 5, 2, 4}, // no space for third CP
};
for (auto t : offsets)
{
char out[array_size (exp) - 2] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto state = mbstate_t{};
auto in_next = (const InternT *) nullptr;
auto out_next = (char *) nullptr;
auto res = codecvt_base::result ();
res = cvt.out (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.partial);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<char>::compare (out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
}
}
template <class InternT>
void
ucs2_to_utf16_out_error (const std::codecvt<InternT, char, mbstate_t> &cvt,
utf16_endianess endianess)
{
using namespace std;
const char16_t input[] = u"b\u0448\uAAAA\U0010AAAA";
const char16_t expected[] = u"b\u0448\uAAAA\U0010AAAA";
static_assert (array_size (input) == 6, "");
static_assert (array_size (expected) == 6, "");
InternT in[array_size (input)];
char exp[array_size (expected) * 2];
copy (begin (input), end (input), begin (in));
utf16_to_bytes (begin (expected), end (expected), begin (exp), endianess);
test_offsets_error<InternT> offsets[] = {
{3, 6, 0, 0, 0xD800, 0},
{3, 6, 0, 0, 0xDBFF, 0},
{3, 6, 0, 0, 0xDC00, 0},
{3, 6, 0, 0, 0xDFFF, 0},
{3, 6, 1, 2, 0xD800, 1},
{3, 6, 1, 2, 0xDBFF, 1},
{3, 6, 1, 2, 0xDC00, 1},
{3, 6, 1, 2, 0xDFFF, 1},
{3, 6, 2, 4, 0xD800, 2},
{3, 6, 2, 4, 0xDBFF, 2},
{3, 6, 2, 4, 0xDC00, 2},
{3, 6, 2, 4, 0xDFFF, 2},
// make the leading surrogate a trailing one
{5, 10, 3, 6, 0xDC00, 3},
{5, 10, 3, 6, 0xDFFF, 3},
// make the trailing surrogate a leading one
{5, 10, 3, 6, 0xD800, 4},
{5, 10, 3, 6, 0xDBFF, 4},
// make the trailing surrogate a BMP char
{5, 10, 3, 6, u'z', 4},
// don't replace anything in the test cases bellow, just show the surrogate
// pair (fourth CP) fully or partially (just the first surrogate)
{5, 10, 3, 6, u'b', 0},
{5, 8, 3, 6, u'b', 0},
{5, 9, 3, 6, u'b', 0},
{4, 10, 3, 6, u'b', 0},
{4, 8, 3, 6, u'b', 0},
{4, 9, 3, 6, u'b', 0},
};
for (auto t : offsets)
{
char out[array_size (exp) - 2] = {};
VERIFY (t.in_size <= array_size (in));
VERIFY (t.out_size <= array_size (out));
VERIFY (t.expected_in_next <= t.in_size);
VERIFY (t.expected_out_next <= t.out_size);
auto old_char = in[t.replace_pos];
in[t.replace_pos] = t.replace_char;
auto state = mbstate_t{};
auto in_next = (const InternT *) nullptr;
auto out_next = (char *) nullptr;
auto res = codecvt_base::result ();
res = cvt.out (state, in, in + t.in_size, in_next, out, out + t.out_size,
out_next);
VERIFY (res == cvt.error);
VERIFY (in_next == in + t.expected_in_next);
VERIFY (out_next == out + t.expected_out_next);
VERIFY (char_traits<char>::compare (out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size (out))
VERIFY (out[t.expected_out_next] == 0);
in[t.replace_pos] = old_char;
}
}
template <class InternT>
void
test_utf16_ucs2_cvt (const std::codecvt<InternT, char, mbstate_t> &cvt,
utf16_endianess endianess)
{
utf16_to_ucs2_in_ok (cvt, endianess);
utf16_to_ucs2_in_partial (cvt, endianess);
utf16_to_ucs2_in_error (cvt, endianess);
ucs2_to_utf16_out_ok (cvt, endianess);
ucs2_to_utf16_out_partial (cvt, endianess);
ucs2_to_utf16_out_error (cvt, endianess);
}