Factor out DiskInterface class into its own source/header files.

This is a TODO in src/ninja_jumble.cc

Signed-off-by: Thiago Farina <tfarina@chromium.org>

1 files changed, 51 insertions, 0 deletions

diff --git a/src/disk_interface.cc b/src/disk_interface.cc
new file mode 100644
index 0000000..70564d7
--- /dev/null
+++ b/src/disk_interface.cc
@@ -0,0 +1,51 @@
+// Copyright 2011 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include "disk_interface.h"
+
+namespace {
+
+std::string DirName(const std::string& path) {
+#ifdef WIN32
+  const char kPathSeparator = '\\';
+#else
+  const char kPathSeparator = '/';
+#endif
+
+  std::string::size_type slash_pos = path.rfind(kPathSeparator);
+  if (slash_pos == std::string::npos)
+    return std::string();  // Nothing to do.
+  while (slash_pos > 0 && path[slash_pos - 1] == kPathSeparator)
+    --slash_pos;
+  return path.substr(0, slash_pos);
+}
+
+}  // namespace
+
+bool DiskInterface::MakeDirs(const std::string& path) {
+  std::string dir = DirName(path);
+  if (dir.empty())
+    return true;  // Reached root; assume it's there.
+  int mtime = Stat(dir);
+  if (mtime < 0)
+    return false;  // Error.
+  if (mtime > 0)
+    return true;  // Exists already; we're done.
+
+  // Directory doesn't exist.  Try creating its parent first.
+  bool success = MakeDirs(dir);
+  if (!success)
+    return false;
+  return MakeDir(dir);
+}