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/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*/
#include <boost/test/unit_test.hpp>
#include <codecvt>
#include <cstdint>
#include <locale>
#include <random>
#include <stdexcept>
#include <string>
#include <vector>
#include "private/svn_utf_private.h"
#include "../src/aprwrap.hpp"
namespace {
std::string to_utf8(const std::u32string& str)
{
static const int32_t endiancheck = 0xa5cbbc5a;
static const bool arch_big_endian =
(reinterpret_cast<const char*>(&endiancheck)[sizeof(endiancheck) - 1] == '\x5a');
apr::pool scratch_pool;
const svn_string_t* utf8_string;
auto err = svn_utf__utf32_to_utf8(
&utf8_string,
reinterpret_cast<const apr_int32_t*>(str.c_str()),
str.size(), arch_big_endian, scratch_pool.get(), scratch_pool.get());
if (err)
{
svn_error_clear(err);
throw std::range_error("bad unicode code point");
}
return std::string(utf8_string->data, utf8_string->len);
}
template<typename C> struct codepoint;
template<> struct codepoint<void>
{
using src_type = char32_t;
static constexpr std::uint_least32_t min = 0;
static constexpr std::uint_least32_t max = 0x10ffff;
static constexpr std::uint_least32_t surrogate_min = 0xd800;
static constexpr std::uint_least32_t surrogate_max = 0xdfff;
};
template<> struct codepoint<char32_t> : public codepoint<void>
{
using dst_type = char32_t;
static std::u32string convert(const std::u32string& str)
{
return str;
};
};
template<> struct codepoint<char16_t> : public codepoint<void>
{
using dst_type = char16_t;
static std::u16string convert(const std::u32string& str)
{
std::wstring_convert<std::codecvt_utf8_utf16<dst_type>, dst_type> u;
return u.from_bytes(to_utf8(str));
}
};
template<> struct codepoint<wchar_t> : public codepoint<void>
{
using dst_type = wchar_t;
#ifdef WIN32
// Be conservative, use UCS-2 for wchar_t on Windows
static_assert(sizeof(wchar_t) == sizeof(char16_t),
"I thought we had 2-byte wide chars on Windows");
static constexpr std::uint_least32_t max = 0xffff;
#endif
static std::wstring convert(const std::u32string& str)
{
#ifdef WIN32
const auto from_utf8 =
[](const std::string& sstr)
{
apr::pool scratch_pool;
const wchar_t* result;
auto err = svn_utf__win32_utf8_to_utf16(
&result, sstr.c_str(), nullptr, scratch_pool.get());
if (err)
{
svn_error_clear(err);
throw std::range_error("bad conversion to utf16");
}
return std::wstring(result);
}
#else
std::wstring_convert<std::codecvt_utf8<dst_type>, dst_type> u;
const auto from_utf8 = [&u](const std::string& sstr)
{
return u.from_bytes(sstr);
};
#endif
return from_utf8(to_utf8(str));
}
};
// Generate random strings.
template<typename C>
inline std::vector<std::basic_string<C>> generate_string_data(int count)
{
using cp = codepoint<C>;
std::mt19937 mt{std::random_device()()};
std::uniform_int_distribution<> cgen{typename cp::src_type(cp::min),
typename cp::src_type(cp::max)};
std::uniform_int_distribution<> lgen{7U, 31U};
std::vector<std::basic_string<C>> result;
result.reserve(count);
for (int i = 0; i < count; ++i)
{
const unsigned len = lgen(mt);
std::u32string val;
val.reserve(len);
for (unsigned j = 0; j < len; ++j)
{
repeat:
auto c = cgen(mt);
if (uint_least32_t(c) >= cp::surrogate_min
&& uint_least32_t(c) <= cp::surrogate_max)
goto repeat;
val.push_back(c);
}
result.emplace_back(cp::convert(val));
}
return result;
}
} // anonymous namespace
#include "../src/private/strings_private.hpp"
#include "fixture_init.hpp"
namespace svn = ::apache::subversion::svnxx;
namespace impl = ::apache::subversion::svnxx::impl;
BOOST_AUTO_TEST_SUITE(strings,
* boost::unit_test::fixture<init>());
BOOST_AUTO_TEST_CASE(wstring_conversion_roundtrip)
{
for (const auto& sample : generate_string_data<wchar_t>(100))
BOOST_TEST((sample == impl::convert<wchar_t>(impl::convert(sample))));
}
BOOST_AUTO_TEST_CASE(u16string_conversion_roundtrip)
{
for (const auto& sample : generate_string_data<char16_t>(100))
BOOST_TEST((sample == impl::convert<char16_t>(impl::convert(sample))));
}
BOOST_AUTO_TEST_CASE(u32string_conversion_roundtrip)
{
for (const auto& sample : generate_string_data<char32_t>(100))
BOOST_TEST((sample == impl::convert<char32_t>(impl::convert(sample))));
}
BOOST_AUTO_TEST_CASE(nulchar)
{
const std::string nulstr("\0", 1);
const std::wstring wnulstr(L"\0", 1);
const std::u16string u16nulstr(u"\0", 1);
const std::u32string u32nulstr(U"\0", 1);
BOOST_TEST(nulstr.size() == 1);
BOOST_TEST(wnulstr.size() == 1);
BOOST_TEST(u16nulstr.size() == 1);
BOOST_TEST(u32nulstr.size() == 1);
BOOST_TEST(impl::convert<wchar_t>(nulstr).size() == 1);
BOOST_TEST(impl::convert<char16_t>(nulstr).size() == 1);
BOOST_TEST(impl::convert<char32_t>(nulstr).size() == 1);
BOOST_TEST((impl::convert<wchar_t>(nulstr) == wnulstr));
BOOST_TEST((impl::convert<char16_t>(nulstr) == u16nulstr));
BOOST_TEST((impl::convert<char32_t>(nulstr) == u32nulstr));
BOOST_TEST(impl::convert(wnulstr).size() == 1);
BOOST_TEST(impl::convert(u16nulstr).size() == 1);
BOOST_TEST(impl::convert(u32nulstr).size() == 1);
BOOST_TEST((impl::convert(wnulstr) == nulstr));
BOOST_TEST((impl::convert(u16nulstr) == nulstr));
BOOST_TEST((impl::convert(u32nulstr) == nulstr));
}
BOOST_AUTO_TEST_SUITE_END();
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