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//
// Copyright (c) 2009-2011 Artyom Beilis (Tonkikh)
//
// Distributed under the Boost Software License, Version 1.0.
// https://www.boost.org/LICENSE_1_0.txt
#include <boost/locale/localization_backend.hpp>
#include <boost/thread/locks.hpp>
#include <boost/thread/mutex.hpp>
#include <functional>
#include <memory>
#include <vector>
#ifdef BOOST_LOCALE_WITH_ICU
# include "../icu/icu_backend.hpp"
#endif
#ifndef BOOST_LOCALE_NO_POSIX_BACKEND
# include "../posix/posix_backend.hpp"
#endif
#ifndef BOOST_LOCALE_NO_STD_BACKEND
# include "../std/std_backend.hpp"
#endif
#ifndef BOOST_LOCALE_NO_WINAPI_BACKEND
# include "../win32/win_backend.hpp"
#endif
namespace boost { namespace locale {
static std::unique_ptr<localization_backend> clone(const localization_backend& backend)
{
return std::unique_ptr<localization_backend>(backend.clone());
}
localization_backend::~localization_backend() = default;
class localization_backend_manager::impl {
public:
impl(const impl& other) : default_backends_(other.default_backends_)
{
for(const auto& i : other.all_backends_)
all_backends_.push_back({i.first, clone(*i.second)});
}
impl() : default_backends_(32, -1) {}
impl& operator=(const impl&) = delete;
localization_backend* create() const
{
std::vector<std::reference_wrapper<const localization_backend>> backends;
for(const auto& i : all_backends_)
backends.push_back(std::cref(*i.second));
return new actual_backend(backends, default_backends_);
}
int find_backend(const std::string& name) const
{
int id = 0;
for(const auto& i : all_backends_) {
if(i.first == name)
return id;
++id;
}
return -1;
}
void add_backend(const std::string& name, std::unique_ptr<localization_backend> ptr)
{
if(all_backends_.empty())
std::fill(default_backends_.begin(), default_backends_.end(), 0);
if(BOOST_LIKELY(find_backend(name) < 0))
all_backends_.push_back(std::make_pair(name, std::move(ptr)));
}
void select(const std::string& backend_name, category_t category = all_categories)
{
const int id = find_backend(backend_name);
if(id >= 0) {
category_t flag = category_first;
for(int& defBackend : default_backends_) {
if(category & flag)
defBackend = id;
++flag;
}
}
}
void remove_all_backends()
{
all_backends_.clear();
std::fill(default_backends_.begin(), default_backends_.end(), -1);
}
std::vector<std::string> get_all_backends() const
{
std::vector<std::string> res;
for(const auto& i : all_backends_)
res.push_back(i.first);
return res;
}
private:
class actual_backend : public localization_backend {
public:
actual_backend(const std::vector<std::reference_wrapper<const localization_backend>>& backends,
const std::vector<int>& index) :
index_(index)
{
for(const localization_backend& b : backends)
backends_.push_back(boost::locale::clone(b));
}
actual_backend* clone() const override
{
std::vector<std::reference_wrapper<const localization_backend>> backends;
for(const auto& b : backends_)
backends.push_back(std::cref(*b));
return new actual_backend(backends, index_);
}
void set_option(const std::string& name, const std::string& value) override
{
for(const auto& b : backends_)
b->set_option(name, value);
}
void clear_options() override
{
for(const auto& b : backends_)
b->clear_options();
}
std::locale install(const std::locale& l, category_t category, char_facet_t type) override
{
unsigned id = 0;
for(category_t v = category_first; v != category; ++v, ++id) {
if(v == category_last)
return l;
}
if(id >= index_.size() || index_[id] == -1)
return l;
return backends_[index_[id]]->install(l, category, type);
}
private:
std::vector<std::unique_ptr<localization_backend>> backends_;
std::vector<int> index_;
};
std::vector<std::pair<std::string, std::unique_ptr<localization_backend>>> all_backends_;
std::vector<int> default_backends_;
};
localization_backend_manager::localization_backend_manager() : pimpl_(new impl()) {}
localization_backend_manager::~localization_backend_manager() = default;
localization_backend_manager::localization_backend_manager(const localization_backend_manager& other) :
pimpl_(new impl(*other.pimpl_))
{}
localization_backend_manager& localization_backend_manager::operator=(const localization_backend_manager& other)
{
pimpl_.reset(new impl(*other.pimpl_));
return *this;
}
localization_backend_manager::localization_backend_manager(localization_backend_manager&&) noexcept = default;
localization_backend_manager&
localization_backend_manager::operator=(localization_backend_manager&&) noexcept = default;
std::unique_ptr<localization_backend> localization_backend_manager::create() const
{
return std::unique_ptr<localization_backend>(pimpl_->create());
}
void localization_backend_manager::add_backend(const std::string& name,
std::unique_ptr<localization_backend> backend)
{
pimpl_->add_backend(name, std::move(backend));
}
void localization_backend_manager::remove_all_backends()
{
pimpl_->remove_all_backends();
}
std::vector<std::string> localization_backend_manager::get_all_backends() const
{
return pimpl_->get_all_backends();
}
void localization_backend_manager::select(const std::string& backend_name, category_t category)
{
pimpl_->select(backend_name, category);
}
namespace {
localization_backend_manager make_default_backend_mgr()
{
localization_backend_manager mgr;
#ifdef BOOST_LOCALE_WITH_ICU
mgr.add_backend("icu", impl_icu::create_localization_backend());
#endif
#ifndef BOOST_LOCALE_NO_POSIX_BACKEND
mgr.add_backend("posix", impl_posix::create_localization_backend());
#endif
#ifndef BOOST_LOCALE_NO_WINAPI_BACKEND
mgr.add_backend("winapi", impl_win::create_localization_backend());
#endif
#ifndef BOOST_LOCALE_NO_STD_BACKEND
mgr.add_backend("std", impl_std::create_localization_backend());
#endif
return mgr;
}
boost::mutex& localization_backend_manager_mutex()
{
static boost::mutex the_mutex;
return the_mutex;
}
localization_backend_manager& localization_backend_manager_global()
{
static localization_backend_manager the_manager = make_default_backend_mgr();
return the_manager;
}
} // namespace
localization_backend_manager localization_backend_manager::global()
{
boost::unique_lock<boost::mutex> lock(localization_backend_manager_mutex());
return localization_backend_manager_global();
}
localization_backend_manager localization_backend_manager::global(const localization_backend_manager& in)
{
boost::unique_lock<boost::mutex> lock(localization_backend_manager_mutex());
return exchange(localization_backend_manager_global(), in);
}
}} // namespace boost::locale
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