vlog.h revision 3345a6884c488ff3a535c2c9acdd33d74b37e311 
1// Copyright (c) 2010 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef BASE_VLOG_H_
6#define BASE_VLOG_H_
7#pragma once
8
9#include <cstddef>
10#include <string>
11#include <utility>
12#include <vector>
13
14#include "base/basictypes.h"
15#include "base/string_piece.h"
16
17namespace logging {
18
19// A helper class containing all the settings for vlogging.
20class VlogInfo {
21 public:
22  // |v_switch| gives the default maximal active V-logging level; 0 is
23  // the default.  Normally positive values are used for V-logging
24  // levels.
25  //
26  // |vmodule_switch| gives the per-module maximal V-logging levels to
27  // override the value given by |v_switch|.
28  // E.g. "my_module=2,foo*=3" would change the logging level for all
29  // code in source files "my_module.*" and "foo*.*" ("-inl" suffixes
30  // are also disregarded for this matching).
31  VlogInfo(const std::string& v_switch,
32           const std::string& vmodule_switch);
33
34  // Returns the vlog level for a given file (usually taken from
35  // __FILE__).
36  int GetVlogLevel(const base::StringPiece& file);
37
38  static const int kDefaultVlogLevel;
39
40 private:
41  typedef std::pair<std::string, int> VmodulePattern;
42
43  int max_vlog_level_;
44  std::vector<VmodulePattern> vmodule_levels_;
45
46  DISALLOW_COPY_AND_ASSIGN(VlogInfo);
47};
48
49}  // namespace logging
50
51#endif  // BASE_VLOG_H_
52