63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
|
|
// 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
|
|
|
|
// 231-Cfg-OutputStreams.cpp
|
|
// Show how to replace the streams with a simple custom made streambuf.
|
|
|
|
// Note that this reimplementation _does not_ follow `std::cerr`
|
|
// semantic, because it buffers the output. For most uses however,
|
|
// there is no important difference between having `std::cerr` buffered
|
|
// or unbuffered.
|
|
#include <catch2/catch_test_macros.hpp>
|
|
|
|
#include <sstream>
|
|
#include <cstdio>
|
|
|
|
class out_buff : public std::stringbuf {
|
|
std::FILE* m_stream;
|
|
public:
|
|
out_buff(std::FILE* stream):m_stream(stream) {}
|
|
~out_buff();
|
|
int sync() override {
|
|
int ret = 0;
|
|
for (unsigned char c : str()) {
|
|
if (putc(c, m_stream) == EOF) {
|
|
ret = -1;
|
|
break;
|
|
}
|
|
}
|
|
// Reset the buffer to avoid printing it multiple times
|
|
str("");
|
|
return ret;
|
|
}
|
|
};
|
|
|
|
out_buff::~out_buff() { pubsync(); }
|
|
|
|
#if defined(__clang__)
|
|
#pragma clang diagnostic ignored "-Wexit-time-destructors" // static variables in cout/cerr/clog
|
|
#endif
|
|
|
|
namespace Catch {
|
|
std::ostream& cout() {
|
|
static std::ostream ret(new out_buff(stdout));
|
|
return ret;
|
|
}
|
|
std::ostream& clog() {
|
|
static std::ostream ret(new out_buff(stderr));
|
|
return ret;
|
|
}
|
|
std::ostream& cerr() {
|
|
return clog();
|
|
}
|
|
}
|
|
|
|
|
|
TEST_CASE("This binary uses putc to write out output", "[compilation-only]") {
|
|
SUCCEED("Nothing to test.");
|
|
}
|