1 //===-- FDReader.cpp ------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "FDReader.h"
10 #include "llvm/Support/MemoryBuffer.h"
11 #include <cassert>
12 #include <cstring>
13 #include <unistd.h>
14 
15 namespace __llvm_libc {
16 namespace testutils {
17 
18 FDReader::FDReader() {
19   if (::pipe(pipefd))
20     llvm::report_fatal_error("pipe(2) failed");
21 }
22 
23 FDReader::~FDReader() {
24   ::close(pipefd[0]);
25   ::close(pipefd[1]);
26 }
27 
28 bool FDReader::matchWritten(const char *str) {
29   llvm::ErrorOr<std::unique_ptr<llvm::MemoryBuffer>> bufOrErr =
30       llvm::MemoryBuffer::getOpenFile(pipefd[0], "<pipe>",
31                                       /* FileSize (irrelevant) */ 0);
32   if (!bufOrErr) {
33     assert(0 && "Error reading from pipe");
34     return false;
35   }
36   const llvm::MemoryBuffer &buf = **bufOrErr;
37   return !std::strncmp(buf.getBufferStart(), str, buf.getBufferSize());
38 }
39 
40 } // namespace testutils
41 } // namespace __llvm_libc
42