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// Copyright Catch2 Authors
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.txt or copy at
// https://www.boost.org/LICENSE_1_0.txt)
// SPDX-License-Identifier: BSL-1.0
#include <Progmasoft/Catch3/Internal/ReusableStringStream.hpp>
#include <Progmasoft/Catch3/Internal/Singletons.hpp>
#include <Progmasoft/Catch3/Internal/ThreadSupport.hpp>
#include <Progmasoft/Catch3/Internal/UniquePtr.hpp>
#include <cstdio>
#include <list>
#include <sstream>
#include <tuple>
#include <vector>
namespace Catch {
// This class encapsulates the idea of a pool of ostringstreams that can be reused.
struct StringStreams {
std::vector<Detail::unique_ptr<std::ostringstream>> m_streams;
// The library can be linked into ASan-instrumented clients without
// instrumenting Catch3 itself. A list avoids mixed-mode libc++ vector
// container annotations for the reusable-index pool.
std::list<std::size_t> m_unused;
std::ostringstream m_referenceStream; // Used for copy state/ flags from
Detail::Mutex m_mutex;
auto add() -> std::pair<std::size_t, std::ostringstream*> {
Detail::LockGuard _( m_mutex );
if( m_unused.empty() ) {
m_streams.push_back( Detail::make_unique<std::ostringstream>() );
return { m_streams.size()-1, m_streams.back().get() };
}
else {
auto index = m_unused.back();
m_unused.pop_back();
return { index, m_streams[index].get() };
}
}
void release( std::size_t index, std::ostream* originalPtr ) {
assert( originalPtr );
originalPtr->copyfmt( m_referenceStream ); // Restore initial flags and other state
Detail::LockGuard _( m_mutex );
assert( originalPtr == m_streams[index].get() && "Mismatch between release index and stream ptr" );
m_unused.push_back( index );
}
};
ReusableStringStream::ReusableStringStream() {
std::tie( m_index, m_oss ) =
Singleton<StringStreams>::getMutable().add();
}
ReusableStringStream::~ReusableStringStream() {
static_cast<std::ostringstream*>( m_oss )->str("");
m_oss->clear();
Singleton<StringStreams>::getMutable().release( m_index, m_oss );
}
std::string ReusableStringStream::str() const {
return static_cast<std::ostringstream*>( m_oss )->str();
}
void ReusableStringStream::str( std::string const& str ) {
static_cast<std::ostringstream*>( m_oss )->str( str );
}
}
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