1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#include "base/unix_file/null_file.h"
18#include <errno.h>
19
20namespace unix_file {
21
22NullFile::NullFile() {
23}
24
25NullFile::~NullFile() {
26}
27
28int NullFile::Close() {
29  return 0;
30}
31
32int NullFile::Flush() {
33  return 0;
34}
35
36int64_t NullFile::Read(char* buf, int64_t byte_count, int64_t offset) const {
37  if (offset < 0) {
38    return -EINVAL;
39  }
40  return 0;
41}
42
43int NullFile::SetLength(int64_t new_length) {
44  if (new_length < 0) {
45    return -EINVAL;
46  }
47  return 0;
48}
49
50int64_t NullFile::GetLength() const {
51  return 0;
52}
53
54int64_t NullFile::Write(const char* buf, int64_t byte_count, int64_t offset) {
55  if (offset < 0) {
56    return -EINVAL;
57  }
58  return byte_count;
59}
60
61}  // namespace unix_file
62