Move tool_output_file into its own file.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115973 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Support/ToolOutputFile.cpp

@@ -0,0 +1,43 @@
+//===--- ToolOutputFile.cpp - Implement the tool_output_file class --------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This implements the tool_output_file class.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/Support/ToolOutputFile.h"
+#include "llvm/System/Signals.h"
+using namespace llvm;
+
+tool_output_file::CleanupInstaller::CleanupInstaller(const char *filename)
+  : Filename(filename), Keep(false) {
+  // Arrange for the file to be deleted if the process is killed.
+  if (Filename != "-")
+    sys::RemoveFileOnSignal(sys::Path(Filename));
+}
+
+tool_output_file::CleanupInstaller::~CleanupInstaller() {
+  // Delete the file if the client hasn't told us not to.
+  if (!Keep && Filename != "-")
+    sys::Path(Filename).eraseFromDisk();
+
+  // Ok, the file is successfully written and closed, or deleted. There's no
+  // further need to clean it up on signals.
+  if (Filename != "-")
+    sys::DontRemoveFileOnSignal(sys::Path(Filename));
+}
+
+tool_output_file::tool_output_file(const char *filename, std::string &ErrorInfo,
+                                   unsigned Flags)
+  : Installer(filename),
+    OS(filename, ErrorInfo, Flags) {
+  // If open fails, no cleanup is needed.
+  if (!ErrorInfo.empty())
+    Installer.Keep = true;
+}