Switch over to the google3 unix_file File*.
I also moved macros.h to base/macros.h to ease google3 porting, at
the expense of a larger than necessary change. (I learned my lesson,
though, and didn't make the equivalent base/logging.h change.)
I'm not sure whether we want to keep the unix_file MappedFile given
our existing MemMap, but it's easier to bring it over and then remove
it (and possibly revert the removal) than to bring it over later.
Change-Id: Id50a66faa5ab17b9bc936cc9043dbc26f791f0ca
diff --git a/src/base/unix_file/null_file.cc b/src/base/unix_file/null_file.cc
new file mode 100644
index 0000000..050decb
--- /dev/null
+++ b/src/base/unix_file/null_file.cc
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * 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 "base/unix_file/null_file.h"
+#include <errno.h>
+
+namespace unix_file {
+
+NullFile::NullFile() {
+}
+
+NullFile::~NullFile() {
+}
+
+int NullFile::Close() {
+ return 0;
+}
+
+int NullFile::Flush() {
+ return 0;
+}
+
+int64_t NullFile::Read(char* buf, int64_t byte_count, int64_t offset) const {
+ if (offset < 0) {
+ return -EINVAL;
+ }
+ return 0;
+}
+
+int NullFile::SetLength(int64_t new_length) {
+ if (new_length < 0) {
+ return -EINVAL;
+ }
+ return 0;
+}
+
+int64_t NullFile::GetLength() const {
+ return 0;
+}
+
+int64_t NullFile::Write(const char* buf, int64_t byte_count, int64_t offset) {
+ if (offset < 0) {
+ return -EINVAL;
+ }
+ return byte_count;
+}
+
+} // namespace unix_file