1/*
2 * Copyright 2010, 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#ifndef BCC_FILEHANDLE_H
18#define BCC_FILEHANDLE_H
19
20#include <sys/types.h>
21
22#include <stddef.h>
23#include <stdint.h>
24
25namespace bcc {
26  namespace OpenMode {
27    enum ModeType {
28      Read = 0,
29      Write = 1,
30    };
31  }
32
33  class FileHandle {
34  private:
35    int mFD;
36
37  public:
38    FileHandle() : mFD(-1) {
39    }
40
41    ~FileHandle() {
42      if (mFD >= 0) {
43        close();
44      }
45    }
46
47    int open(char const *filename, OpenMode::ModeType mode);
48
49    void close();
50
51    int getFD() {
52      // Note: This function is designed not being qualified by const.
53      // Because once the file descriptor is given, the user can do every
54      // thing on file descriptor.
55
56      return mFD;
57    }
58
59    off_t seek(off_t offset, int whence);
60
61    ssize_t read(char *buf, size_t count);
62
63    ssize_t write(char const *buf, size_t count);
64
65    void truncate();
66
67  };
68
69} // namespace bcc
70
71#endif // BCC_FILEHANDLE_H
72