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rippled/include/xrpl/beast/unit_test/dstream.h
2024-06-20 13:57:14 -05:00

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//
// Copyright (c) 2013-2017 Vinnie Falco (vinnie dot falco at gmail dot com)
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#ifndef BEAST_UNIT_TEST_DSTREAM_HPP
#define BEAST_UNIT_TEST_DSTREAM_HPP
#include <boost/config.hpp>
#include <ios>
#include <memory>
#include <ostream>
#include <streambuf>
#include <string>
#ifdef BOOST_WINDOWS
#include <boost/detail/winapi/basic_types.hpp>
//#include <boost/detail/winapi/debugapi.hpp>
#endif
namespace beast {
namespace unit_test {
#ifdef BOOST_WINDOWS
namespace detail {
template <class CharT, class Traits, class Allocator>
class dstream_buf : public std::basic_stringbuf<CharT, Traits, Allocator>
{
using ostream = std::basic_ostream<CharT, Traits>;
bool dbg_;
ostream& os_;
template <class T>
void
write(T const*) = delete;
void
write(char const* s)
{
if (dbg_)
/*boost::detail::winapi*/ ::OutputDebugStringA(s);
os_ << s;
}
void
write(wchar_t const* s)
{
if (dbg_)
/*boost::detail::winapi*/ ::OutputDebugStringW(s);
os_ << s;
}
public:
explicit dstream_buf(ostream& os)
: os_(os), dbg_(/*boost::detail::winapi*/ ::IsDebuggerPresent() != 0)
{
}
~dstream_buf()
{
sync();
}
int
sync() override
{
write(this->str().c_str());
this->str("");
return 0;
}
};
} // namespace detail
/** std::ostream with Visual Studio IDE redirection.
Instances of this stream wrap a specified `std::ostream`
(such as `std::cout` or `std::cerr`). If the IDE debugger
is attached when the stream is created, output will be
additionally copied to the Visual Studio Output window.
*/
template <
class CharT,
class Traits = std::char_traits<CharT>,
class Allocator = std::allocator<CharT>>
class basic_dstream : public std::basic_ostream<CharT, Traits>
{
detail::dstream_buf<CharT, Traits, Allocator> buf_;
public:
/** Construct a stream.
@param os The output stream to wrap.
*/
explicit basic_dstream(std::ostream& os)
: std::basic_ostream<CharT, Traits>(&buf_), buf_(os)
{
if (os.flags() & std::ios::unitbuf)
std::unitbuf(*this);
}
};
using dstream = basic_dstream<char>;
using dwstream = basic_dstream<wchar_t>;
#else
using dstream = std::ostream&;
using dwstream = std::wostream&;
#endif
} // namespace unit_test
} // namespace beast
#endif