hmz007
36ed224bac
Signed-off-by: hmz007 <hmz007@gmail.com> Change-Id: Ib87fdbe7a0be7dc961af3500fe9ea4589a127f9f
57 lines
1.4 KiB
C++
57 lines
1.4 KiB
C++
// 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.
|
|
|
|
#define CATCH_CONFIG_NOSTDOUT
|
|
#define CATCH_CONFIG_MAIN
|
|
#include <catch2/catch.hpp>
|
|
|
|
|
|
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.");
|
|
}
|