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llvm / llvm-project / libcxx / refs/heads/main / . / test / std / localization / codecvt_unicode.pass.cpp
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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS -D_LIBCPP_ENABLE_CXX26_REMOVED_CODECVT
// XFAIL: stdlib=apple-libc++ && target={{.+}}-apple-macosx{{10.9|10.10|10.11|10.12|10.13|10.14|10.15|11.0|12.0|13.0}}
#include <algorithm>
#include <cassert>
#include <codecvt>
#include <locale>
#include "test_macros.h"
struct test_offsets_ok {
size_t in_size;
size_t out_size;
};
struct test_offsets_partial {
size_t in_size;
size_t out_size;
size_t expected_in_next;
size_t expected_out_next;
};
template <class CharT>
struct test_offsets_error {
size_t in_size;
size_t out_size;
size_t expected_in_next;
size_t expected_out_next;
CharT replace_char;
size_t replace_pos;
};
#define array_size(x) (sizeof(x) / sizeof(x)[0])
using std::begin;
using std::char_traits;
using std::codecvt_base;
using std::copy;
using std::end;
template <class InternT, class ExternT>
void utf8_to_utf32_in_ok(const std::codecvt<InternT, ExternT, mbstate_t>& cvt) {
// 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[] = {'b', 0x0448, 0xAAAA, 0x10AAAA, 0};
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));
assert(char_traits<ExternT>::length(in) == 10);
assert(char_traits<InternT>::length(exp) == 4);
test_offsets_ok offsets[] = {{0, 0}, {1, 1}, {3, 2}, {6, 3}, {10, 4}};
for (test_offsets_ok* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_ok t = *it;
InternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
mbstate_t state = {};
const ExternT* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.ok);
assert(in_next == in + t.in_size);
assert(out_next == out + t.out_size);
assert(char_traits<InternT>::compare(out, exp, t.out_size) == 0);
if (t.out_size < array_size(out))
assert(out[t.out_size] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, t.out_size);
assert(len >= 0);
assert(static_cast<size_t>(len) == t.in_size);
}
for (test_offsets_ok* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_ok t = *it;
InternT out[array_size(exp)] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
mbstate_t state = {};
const ExternT* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, end(out), out_next);
assert(res == cvt.ok);
assert(in_next == in + t.in_size);
assert(out_next == out + t.out_size);
assert(char_traits<InternT>::compare(out, exp, t.out_size) == 0);
if (t.out_size < array_size(out))
assert(out[t.out_size] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, array_size(out));
assert(len >= 0);
assert(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) {
// 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[] = {'b', 0x0448, 0xAAAA, 0x10AAAA, 0};
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));
assert(char_traits<ExternT>::length(in) == 10);
assert(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 (test_offsets_partial* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_partial t = *it;
InternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
mbstate_t state = {};
const ExternT* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.partial);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<InternT>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(out[t.expected_out_next] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, t.out_size);
assert(len >= 0);
assert(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) {
// 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[] = {'b', 0x0448, 0xD700, 0x10AAAA, 0};
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));
assert(char_traits<ExternT>::length(in) == 10);
assert(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 (test_offsets_error<unsigned char>* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_error<unsigned char> t = *it;
InternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
ExternT old_char = in[t.replace_pos];
in[t.replace_pos] = t.replace_char;
mbstate_t state = {};
const ExternT* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.error);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<InternT>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(out[t.expected_out_next] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, t.out_size);
assert(len >= 0);
assert(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) {
// UTF-8 string of 1-byte CP, 2-byte CP, 3-byte CP and 4-byte CP
const char32_t input[] = {'b', 0x0448, 0xAAAA, 0x10AAAA, 0};
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));
assert(char_traits<InternT>::length(in) == 4);
assert(char_traits<ExternT>::length(exp) == 10);
test_offsets_ok offsets[] = {{0, 0}, {1, 1}, {2, 3}, {3, 6}, {4, 10}};
for (test_offsets_ok* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_ok t = *it;
ExternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
mbstate_t state = {};
const InternT* in_next = nullptr;
ExternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.out(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.ok);
assert(in_next == in + t.in_size);
assert(out_next == out + t.out_size);
assert(char_traits<ExternT>::compare(out, exp, t.out_size) == 0);
if (t.out_size < array_size(out))
assert(out[t.out_size] == 0);
}
}
template <class InternT, class ExternT>
void utf32_to_utf8_out_partial(const std::codecvt<InternT, ExternT, mbstate_t>& cvt) {
// UTF-8 string of 1-byte CP, 2-byte CP, 3-byte CP and 4-byte CP
const char32_t input[] = {'b', 0x0448, 0xAAAA, 0x10AAAA, 0};
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));
assert(char_traits<InternT>::length(in) == 4);
assert(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 (test_offsets_partial* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_partial t = *it;
ExternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
mbstate_t state = {};
const InternT* in_next = nullptr;
ExternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.out(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.partial);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<ExternT>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(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) {
// UTF-8 string of 1-byte CP, 2-byte CP, 3-byte CP and 4-byte CP
const char32_t input[] = {'b', 0x0448, 0xAAAA, 0x10AAAA, 0};
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));
assert(char_traits<InternT>::length(in) == 4);
assert(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 (test_offsets_error<InternT>* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_error<InternT> t = *it;
ExternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
InternT old_char = in[t.replace_pos];
in[t.replace_pos] = t.replace_char;
mbstate_t state = {};
const InternT* in_next = nullptr;
ExternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.out(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.error);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<ExternT>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(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) {
// 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[] = {'b', 0x0448, 0xAAAA, 0xDBEA, 0xDEAA, 0};
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));
assert(char_traits<ExternT>::length(in) == 10);
assert(char_traits<InternT>::length(exp) == 5);
test_offsets_ok offsets[] = {{0, 0}, {1, 1}, {3, 2}, {6, 3}, {10, 5}};
for (test_offsets_ok* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_ok t = *it;
InternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
mbstate_t state = {};
const ExternT* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.ok);
assert(in_next == in + t.in_size);
assert(out_next == out + t.out_size);
assert(char_traits<InternT>::compare(out, exp, t.out_size) == 0);
if (t.out_size < array_size(out))
assert(out[t.out_size] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, t.out_size);
assert(len >= 0);
assert(static_cast<size_t>(len) == t.in_size);
}
for (test_offsets_ok* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_ok t = *it;
InternT out[array_size(exp)] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
mbstate_t state = {};
const ExternT* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, end(out), out_next);
assert(res == cvt.ok);
assert(in_next == in + t.in_size);
assert(out_next == out + t.out_size);
assert(char_traits<InternT>::compare(out, exp, t.out_size) == 0);
if (t.out_size < array_size(out))
assert(out[t.out_size] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, array_size(out));
assert(len >= 0);
assert(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) {
// 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[] = {'b', 0x0448, 0xAAAA, 0xDBEA, 0xDEAA, 0};
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));
assert(char_traits<ExternT>::length(in) == 10);
assert(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 (test_offsets_partial* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_partial t = *it;
InternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
mbstate_t state = {};
const ExternT* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.partial);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<InternT>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(out[t.expected_out_next] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, t.out_size);
assert(len >= 0);
assert(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) {
// 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[] = {'b', 0x0448, 0xD700, 0xDBEA, 0xDEAA, 0};
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));
assert(char_traits<ExternT>::length(in) == 10);
assert(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 (test_offsets_error<unsigned char>* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_error<unsigned char> t = *it;
InternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
ExternT old_char = in[t.replace_pos];
in[t.replace_pos] = t.replace_char;
mbstate_t state = {};
const ExternT* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.error);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<InternT>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(out[t.expected_out_next] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, t.out_size);
assert(len >= 0);
assert(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) {
// UTF-8 string of 1-byte CP, 2-byte CP, 3-byte CP and 4-byte CP
const char16_t input[] = {'b', 0x0448, 0xAAAA, 0xDBEA, 0xDEAA, 0};
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));
assert(char_traits<InternT>::length(in) == 5);
assert(char_traits<ExternT>::length(exp) == 10);
test_offsets_ok offsets[] = {{0, 0}, {1, 1}, {2, 3}, {3, 6}, {5, 10}};
for (test_offsets_ok* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_ok t = *it;
ExternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
mbstate_t state = {};
const InternT* in_next = nullptr;
ExternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.out(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.ok);
assert(in_next == in + t.in_size);
assert(out_next == out + t.out_size);
assert(char_traits<ExternT>::compare(out, exp, t.out_size) == 0);
if (t.out_size < array_size(out))
assert(out[t.out_size] == 0);
}
}
template <class InternT, class ExternT>
void utf16_to_utf8_out_partial(const std::codecvt<InternT, ExternT, mbstate_t>& cvt) {
// UTF-8 string of 1-byte CP, 2-byte CP, 3-byte CP and 4-byte CP
const char16_t input[] = {'b', 0x0448, 0xAAAA, 0xDBEA, 0xDEAA, 0};
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));
assert(char_traits<InternT>::length(in) == 5);
assert(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 (test_offsets_partial* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_partial t = *it;
ExternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
mbstate_t state = {};
const InternT* in_next = nullptr;
ExternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.out(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.partial);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<ExternT>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(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) {
// UTF-8 string of 1-byte CP, 2-byte CP, 3-byte CP and 4-byte CP
const char16_t input[] = {'b', 0x0448, 0xAAAA, 0xDBEA, 0xDEAA, 0};
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));
assert(char_traits<InternT>::length(in) == 5);
assert(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, 'z', 4},
};
for (test_offsets_error<InternT>* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_error<InternT> t = *it;
ExternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
InternT old_char = in[t.replace_pos];
in[t.replace_pos] = t.replace_char;
mbstate_t state = {};
const InternT* in_next = nullptr;
ExternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.out(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.error);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<ExternT>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(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) {
// 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[] = {'b', 0x0448, 0xAAAA, 0};
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));
assert(char_traits<ExternT>::length(in) == 6);
assert(char_traits<InternT>::length(exp) == 3);
test_offsets_ok offsets[] = {{0, 0}, {1, 1}, {3, 2}, {6, 3}};
for (test_offsets_ok* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_ok t = *it;
InternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
mbstate_t state = {};
const ExternT* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.ok);
assert(in_next == in + t.in_size);
assert(out_next == out + t.out_size);
assert(char_traits<InternT>::compare(out, exp, t.out_size) == 0);
if (t.out_size < array_size(out))
assert(out[t.out_size] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, t.out_size);
assert(len >= 0);
assert(static_cast<size_t>(len) == t.in_size);
}
for (test_offsets_ok* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_ok t = *it;
InternT out[array_size(exp)] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
mbstate_t state = {};
const ExternT* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, end(out), out_next);
assert(res == cvt.ok);
assert(in_next == in + t.in_size);
assert(out_next == out + t.out_size);
assert(char_traits<InternT>::compare(out, exp, t.out_size) == 0);
if (t.out_size < array_size(out))
assert(out[t.out_size] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, array_size(out));
assert(len >= 0);
assert(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) {
// 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[] = {'b', 0x0448, 0xAAAA, 0};
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));
assert(char_traits<ExternT>::length(in) == 6);
assert(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 (test_offsets_partial* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_partial t = *it;
InternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
mbstate_t state = {};
const ExternT* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.partial);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<InternT>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(out[t.expected_out_next] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, t.out_size);
assert(len >= 0);
assert(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) {
const unsigned char input[] = "b\u0448\uD700\U0010AAAA";
const char16_t expected[] = {'b', 0x0448, 0xD700, 0xDBEA, 0xDEAA, 0};
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));
assert(char_traits<ExternT>::length(in) == 10);
assert(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 (test_offsets_error<unsigned char>* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_error<unsigned char> t = *it;
InternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
ExternT old_char = in[t.replace_pos];
in[t.replace_pos] = t.replace_char;
mbstate_t state = {};
const ExternT* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.error);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<InternT>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(out[t.expected_out_next] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, t.out_size);
assert(len >= 0);
assert(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) {
// UTF-8 string of 1-byte CP, 2-byte CP and 3-byte CP
const char16_t input[] = {'b', 0x0448, 0xAAAA, 0};
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));
assert(char_traits<InternT>::length(in) == 3);
assert(char_traits<ExternT>::length(exp) == 6);
test_offsets_ok offsets[] = {{0, 0}, {1, 1}, {2, 3}, {3, 6}};
for (test_offsets_ok* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_ok t = *it;
ExternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
mbstate_t state = {};
const InternT* in_next = nullptr;
ExternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.out(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.ok);
assert(in_next == in + t.in_size);
assert(out_next == out + t.out_size);
assert(char_traits<ExternT>::compare(out, exp, t.out_size) == 0);
if (t.out_size < array_size(out))
assert(out[t.out_size] == 0);
}
}
template <class InternT, class ExternT>
void ucs2_to_utf8_out_partial(const std::codecvt<InternT, ExternT, mbstate_t>& cvt) {
// UTF-8 string of 1-byte CP, 2-byte CP and 3-byte CP
const char16_t input[] = {'b', 0x0448, 0xAAAA, 0};
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));
assert(char_traits<InternT>::length(in) == 3);
assert(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 (test_offsets_partial* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_partial t = *it;
ExternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
mbstate_t state = {};
const InternT* in_next = nullptr;
ExternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.out(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.partial);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<ExternT>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(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) {
const char16_t input[] = {'b', 0x0448, 0xAAAA, 0xDBEA, 0xDEAA, 0};
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));
assert(char_traits<InternT>::length(in) == 5);
assert(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, '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, 'b', 0},
{5, 7, 3, 6, 'b', 0}, // no space for fourth CP
{5, 8, 3, 6, 'b', 0}, // no space for fourth CP
{5, 9, 3, 6, 'b', 0}, // no space for fourth CP
{4, 10, 3, 6, 'b', 0}, // incomplete fourth CP
{4, 7, 3, 6, 'b', 0}, // incomplete fourth CP, and no space for it
{4, 8, 3, 6, 'b', 0}, // incomplete fourth CP, and no space for it
{4, 9, 3, 6, 'b', 0}, // incomplete fourth CP, and no space for it
};
for (test_offsets_error<InternT>* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_error<InternT> t = *it;
ExternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
InternT old_char = in[t.replace_pos];
in[t.replace_pos] = t.replace_char;
mbstate_t state = {};
const InternT* in_next = nullptr;
ExternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.out(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.error);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<ExternT>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(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) {
const char16_t input[] = {'b', 0x0448, 0xAAAA, 0xDBEA, 0xDEAA, 0};
const char32_t expected[] = {'b', 0x0448, 0xAAAA, 0x10AAAA, 0};
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 (test_offsets_ok* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_ok t = *it;
InternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
mbstate_t state = {};
const char* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.ok);
assert(in_next == in + t.in_size);
assert(out_next == out + t.out_size);
assert(char_traits<InternT>::compare(out, exp, t.out_size) == 0);
if (t.out_size < array_size(out))
assert(out[t.out_size] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, t.out_size);
assert(len >= 0);
assert(static_cast<size_t>(len) == t.in_size);
}
for (test_offsets_ok* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_ok t = *it;
InternT out[array_size(exp)] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
mbstate_t state = {};
const char* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, end(out), out_next);
assert(res == cvt.ok);
assert(in_next == in + t.in_size);
assert(out_next == out + t.out_size);
assert(char_traits<InternT>::compare(out, exp, t.out_size) == 0);
if (t.out_size < array_size(out))
assert(out[t.out_size] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, array_size(out));
assert(len >= 0);
assert(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) {
const char16_t input[] = {'b', 0x0448, 0xAAAA, 0xDBEA, 0xDEAA, 0};
const char32_t expected[] = {'b', 0x0448, 0xAAAA, 0x10AAAA, 0};
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 (test_offsets_partial* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_partial t = *it;
InternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
mbstate_t state = {};
const char* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.partial);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<InternT>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(out[t.expected_out_next] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, t.out_size);
assert(len >= 0);
assert(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) {
char16_t input[] = {'b', 0x0448, 0xAAAA, 0xDBEA, 0xDEAA, 0};
const char32_t expected[] = {'b', 0x0448, 0xAAAA, 0x10AAAA, 0};
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, 'z', 4},
};
for (test_offsets_error<char16_t>* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_error<char16_t> t = *it;
char in[array_size(input) * 2];
InternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
char16_t 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);
mbstate_t state = {};
const char* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.error);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<InternT>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(out[t.expected_out_next] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, t.out_size);
assert(len >= 0);
assert(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) {
const char32_t input[] = {'b', 0x0448, 0xAAAA, 0x10AAAA, 0};
const char16_t expected[] = {'b', 0x0448, 0xAAAA, 0xDBEA, 0xDEAA, 0};
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 (test_offsets_ok* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_ok t = *it;
char out[array_size(exp) - 2] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
mbstate_t state = {};
const InternT* in_next = nullptr;
char* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.out(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.ok);
assert(in_next == in + t.in_size);
assert(out_next == out + t.out_size);
assert(char_traits<char>::compare(out, exp, t.out_size) == 0);
if (t.out_size < array_size(out))
assert(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) {
const char32_t input[] = {'b', 0x0448, 0xAAAA, 0x10AAAA, 0};
const char16_t expected[] = {'b', 0x0448, 0xAAAA, 0xDBEA, 0xDEAA, 0};
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 (test_offsets_partial* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_partial t = *it;
char out[array_size(exp) - 2] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
mbstate_t state = {};
const InternT* in_next = nullptr;
char* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.out(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.partial);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<char>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(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) {
const char32_t input[] = {'b', 0x0448, 0xAAAA, 0x10AAAA, 0};
const char16_t expected[] = {'b', 0x0448, 0xAAAA, 0xDBEA, 0xDEAA, 0};
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 (test_offsets_error<InternT>* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_error<InternT> t = *it;
char out[array_size(exp) - 2] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
InternT old_char = in[t.replace_pos];
in[t.replace_pos] = t.replace_char;
mbstate_t state = {};
const InternT* in_next = nullptr;
char* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.out(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.error);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<char>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(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) {
const char16_t input[] = {'b', 0x0448, 0xAAAA, 0};
const char16_t expected[] = {'b', 0x0448, 0xAAAA, 0};
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 (test_offsets_ok* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_ok t = *it;
InternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
mbstate_t state = {};
const char* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.ok);
assert(in_next == in + t.in_size);
assert(out_next == out + t.out_size);
assert(char_traits<InternT>::compare(out, exp, t.out_size) == 0);
if (t.out_size < array_size(out))
assert(out[t.out_size] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, t.out_size);
assert(len >= 0);
assert(static_cast<size_t>(len) == t.in_size);
}
for (test_offsets_ok* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_ok t = *it;
InternT out[array_size(exp)] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
mbstate_t state = {};
const char* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, end(out), out_next);
assert(res == cvt.ok);
assert(in_next == in + t.in_size);
assert(out_next == out + t.out_size);
assert(char_traits<InternT>::compare(out, exp, t.out_size) == 0);
if (t.out_size < array_size(out))
assert(out[t.out_size] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, array_size(out));
assert(len >= 0);
assert(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) {
const char16_t input[] = {'b', 0x0448, 0xAAAA, 0};
const char16_t expected[] = {'b', 0x0448, 0xAAAA, 0};
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 (test_offsets_partial* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_partial t = *it;
InternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
mbstate_t state = {};
const char* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.partial);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<InternT>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(out[t.expected_out_next] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, t.out_size);
assert(len >= 0);
assert(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) {
char16_t input[] = {'b', 0x0448, 0xAAAA, 0xDBEA, 0xDEAA, 0};
const char16_t expected[] = {'b', 0x0448, 0xAAAA, 0xDBEA, 0xDEAA, 0};
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, '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, 'b', 0},
{8, 5, 6, 3, 'b', 0},
{9, 5, 6, 3, 'b', 0},
{10, 4, 6, 3, 'b', 0},
{8, 4, 6, 3, 'b', 0},
{9, 4, 6, 3, 'b', 0},
};
for (test_offsets_error<char16_t>* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_error<char16_t> t = *it;
char in[array_size(input) * 2];
InternT out[array_size(exp) - 1] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
char16_t 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);
mbstate_t state = {};
const char* in_next = nullptr;
InternT* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.in(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.error);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<InternT>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(out[t.expected_out_next] == 0);
state = mbstate_t();
int len = cvt.length(state, in, in + t.in_size, t.out_size);
assert(len >= 0);
assert(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) {
const char16_t input[] = {'b', 0x0448, 0xAAAA, 0};
const char16_t expected[] = {'b', 0x0448, 0xAAAA, 0};
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 (test_offsets_ok* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_ok t = *it;
char out[array_size(exp) - 2] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
mbstate_t state = {};
const InternT* in_next = nullptr;
char* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.out(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.ok);
assert(in_next == in + t.in_size);
assert(out_next == out + t.out_size);
assert(char_traits<char>::compare(out, exp, t.out_size) == 0);
if (t.out_size < array_size(out))
assert(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) {
const char16_t input[] = {'b', 0x0448, 0xAAAA, 0};
const char16_t expected[] = {'b', 0x0448, 0xAAAA, 0};
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 (test_offsets_partial* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_partial t = *it;
char out[array_size(exp) - 2] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
mbstate_t state = {};
const InternT* in_next = nullptr;
char* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.out(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.partial);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<char>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(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) {
const char16_t input[] = {'b', 0x0448, 0xAAAA, 0xDBEA, 0xDEAA, 0};
const char16_t expected[] = {'b', 0x0448, 0xAAAA, 0xDBEA, 0xDEAA, 0};
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, '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, 'b', 0},
{5, 8, 3, 6, 'b', 0},
{5, 9, 3, 6, 'b', 0},
{4, 10, 3, 6, 'b', 0},
{4, 8, 3, 6, 'b', 0},
{4, 9, 3, 6, 'b', 0},
};
for (test_offsets_error<InternT>* it = begin(offsets); it != end(offsets); ++it) {
test_offsets_error<InternT> t = *it;
char out[array_size(exp) - 2] = {};
assert(t.in_size <= array_size(in));
assert(t.out_size <= array_size(out));
assert(t.expected_in_next <= t.in_size);
assert(t.expected_out_next <= t.out_size);
InternT old_char = in[t.replace_pos];
in[t.replace_pos] = t.replace_char;
mbstate_t state = {};
const InternT* in_next = nullptr;
char* out_next = nullptr;
codecvt_base::result res = codecvt_base::ok;
res = cvt.out(state, in, in + t.in_size, in_next, out, out + t.out_size, out_next);
assert(res == cvt.error);
assert(in_next == in + t.expected_in_next);
assert(out_next == out + t.expected_out_next);
assert(char_traits<char>::compare(out, exp, t.expected_out_next) == 0);
if (t.expected_out_next < array_size(out))
assert(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);
}
using std::codecvt;
using std::codecvt_utf16;
using std::codecvt_utf8;
using std::codecvt_utf8_utf16;
using std::has_facet;
using std::locale;
using std::use_facet;
void test_utf8_utf32_codecvts() {
typedef codecvt<char32_t, char, mbstate_t> codecvt_c32;
const locale& loc_c = locale::classic();
assert(has_facet<codecvt_c32>(loc_c));
const codecvt_c32& cvt = use_facet<codecvt_c32>(loc_c);
test_utf8_utf32_cvt(cvt);
codecvt_utf8<char32_t> cvt2;
test_utf8_utf32_cvt(cvt2);
#if !defined(TEST_HAS_NO_WIDE_CHARACTERS) && !defined(TEST_SHORT_WCHAR)
codecvt_utf8<wchar_t> cvt3;
test_utf8_utf32_cvt(cvt3);
#endif
#ifndef TEST_HAS_NO_CHAR8_T
typedef codecvt<char32_t, char8_t, mbstate_t> codecvt_c32_c8;
assert(has_facet<codecvt_c32_c8>(loc_c));
const codecvt_c32_c8& cvt4 = use_facet<codecvt_c32_c8>(loc_c);
test_utf8_utf32_cvt(cvt4);
#endif
}
void test_utf8_utf16_codecvts() {
typedef codecvt<char16_t, char, mbstate_t> codecvt_c16;
const locale& loc_c = locale::classic();
assert(has_facet<codecvt_c16>(loc_c));
const codecvt_c16& cvt = use_facet<codecvt_c16>(loc_c);
test_utf8_utf16_cvt(cvt);
codecvt_utf8_utf16<char16_t> cvt2;
test_utf8_utf16_cvt(cvt2);
codecvt_utf8_utf16<char32_t> cvt3;
test_utf8_utf16_cvt(cvt3);
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
codecvt_utf8_utf16<wchar_t> cvt4;
test_utf8_utf16_cvt(cvt4);
#endif
#ifndef TEST_HAS_NO_CHAR8_T
typedef codecvt<char16_t, char8_t, mbstate_t> codecvt_c16_c8;
assert(has_facet<codecvt_c16_c8>(loc_c));
const codecvt_c16_c8& cvt5 = use_facet<codecvt_c16_c8>(loc_c);
test_utf8_utf16_cvt(cvt5);
#endif
}
void test_utf8_ucs2_codecvts() {
codecvt_utf8<char16_t> cvt;
test_utf8_ucs2_cvt(cvt);
#if !defined(TEST_HAS_NO_WIDE_CHARACTERS) && defined(TEST_SHORT_WCHAR)
codecvt_utf8<wchar_t> cvt2;
test_utf8_ucs2_cvt(cvt2);
#endif
}
void test_utf16_utf32_codecvts() {
codecvt_utf16<char32_t> cvt;
test_utf16_utf32_cvt(cvt, utf16_big_endian);
codecvt_utf16<char32_t, 0x10FFFF, std::little_endian> cvt2;
test_utf16_utf32_cvt(cvt2, utf16_little_endian);
#if !defined(TEST_HAS_NO_WIDE_CHARACTERS) && !defined(TEST_SHORT_WCHAR)
codecvt_utf16<wchar_t> cvt3;
test_utf16_utf32_cvt(cvt3, utf16_big_endian);
codecvt_utf16<wchar_t, 0x10FFFF, std::little_endian> cvt4;
test_utf16_utf32_cvt(cvt4, utf16_little_endian);
#endif
}
void test_utf16_ucs2_codecvts() {
codecvt_utf16<char16_t> cvt;
test_utf16_ucs2_cvt(cvt, utf16_big_endian);
codecvt_utf16<char16_t, 0x10FFFF, std::little_endian> cvt2;
test_utf16_ucs2_cvt(cvt2, utf16_little_endian);
#if !defined(TEST_HAS_NO_WIDE_CHARACTERS) && defined(TEST_SHORT_WCHAR)
codecvt_utf16<wchar_t> cvt3;
test_utf16_ucs2_cvt(cvt3, utf16_big_endian);
codecvt_utf16<wchar_t, 0x10FFFF, std::little_endian> cvt4;
test_utf16_ucs2_cvt(cvt4, utf16_little_endian);
#endif
}
int main() {
test_utf8_utf32_codecvts();
test_utf8_utf16_codecvts();
test_utf8_ucs2_codecvts();
test_utf16_utf32_codecvts();
test_utf16_ucs2_codecvts();
}