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//===-- FDReader.cpp ------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "FDReader.h"
#include <cassert>
#include <cstring>
#include <iostream>
#include <unistd.h>
namespace __llvm_libc {
namespace testutils {
FDReader::FDReader() {
if (::pipe(pipefd)) {
std::cerr << "pipe(2) failed";
abort();
}
}
FDReader::~FDReader() {
::close(pipefd[0]);
::close(pipefd[1]);
}
bool FDReader::matchWritten(const char *str) {
::close(pipefd[1]);
constexpr ssize_t ChunkSize = 4096 * 4;
char Buffer[ChunkSize];
std::string PipeStr;
std::string InputStr(str);
for (int BytesRead; (BytesRead = ::read(pipefd[0], Buffer, ChunkSize));) {
if (BytesRead > 0) {
PipeStr.insert(PipeStr.size(), Buffer, BytesRead);
} else {
assert(0 && "Error reading from pipe");
return false;
}
}
return PipeStr == InputStr;
}
} // namespace testutils
} // namespace __llvm_libc
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