1 files changed, 50 insertions, 0 deletions
diff --git a/llvm/lib/Support/VirtualOutputConfig.cpp b/llvm/lib/Support/VirtualOutputConfig.cpp
new file mode 100644
index 000000000000..f1d3c0fe3c6e
--- /dev/null
+++ b/llvm/lib/Support/VirtualOutputConfig.cpp
@@ -0,0 +1,50 @@
+//===- VirtualOutputConfig.cpp - Virtual output configuration -------------===//
+//
+// 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 "llvm/Support/VirtualOutputConfig.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/raw_ostream.h"
+
+using namespace llvm;
+using namespace llvm::vfs;
+
+OutputConfig &OutputConfig::setOpenFlags(const sys::fs::OpenFlags &Flags) {
+  // Ignore CRLF on its own as invalid.
+  using namespace llvm::sys::fs;
+  return Flags & OF_Text
+             ? setText().setCRLF(Flags & OF_CRLF).setAppend(Flags & OF_Append)
+             : setBinary().setAppend(Flags & OF_Append);
+}
+
+void OutputConfig::print(raw_ostream &OS) const {
+  OS << "{";
+  bool IsFirst = true;
+  auto printFlag = [&](StringRef FlagName, bool Value) {
+    if (IsFirst)
+      IsFirst = false;
+    else
+      OS << ",";
+    if (!Value)
+      OS << "No";
+    OS << FlagName;
+  };
+
+#define HANDLE_OUTPUT_CONFIG_FLAG(NAME, DEFAULT)                               \
+  if (get##NAME() != DEFAULT)                                                  \
+    printFlag(#NAME, get##NAME());
+#include "llvm/Support/VirtualOutputConfig.def"
+  OS << "}";
+}
+
+LLVM_DUMP_METHOD void OutputConfig::dump() const { print(dbgs()); }
+
+raw_ostream &llvm::operator<<(raw_ostream &OS, OutputConfig Config) {
+  Config.print(OS);
+  return OS;
+}