| // Copyright (c) 2010 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef BASE_VLOG_H_ |
| #define BASE_VLOG_H_ |
| #pragma once |
| |
| #include <cstddef> |
| #include <string> |
| #include <vector> |
| |
| #include "base/basictypes.h" |
| #include "base/string_piece.h" |
| |
| namespace logging { |
| |
| // A helper class containing all the settings for vlogging. |
| class VlogInfo { |
| public: |
| // |v_switch| gives the default maximal active V-logging level; 0 is |
| // the default. Normally positive values are used for V-logging |
| // levels. |
| // |
| // |vmodule_switch| gives the per-module maximal V-logging levels to |
| // override the value given by |v_switch|. |
| // E.g. "my_module=2,foo*=3" would change the logging level for all |
| // code in source files "my_module.*" and "foo*.*" ("-inl" suffixes |
| // are also disregarded for this matching). |
| // |
| // |log_severity| points to an int that stores the log level. If a valid |
| // |v_switch| is provided, it will set the log level, and the default |
| // vlog severity will be read from there.. |
| // |
| // Any pattern containing a forward or backward slash will be tested |
| // against the whole pathname and not just the module. E.g., |
| // "*/foo/bar/*=2" would change the logging level for all code in |
| // source files under a "foo/bar" directory. |
| VlogInfo(const std::string& v_switch, |
| const std::string& vmodule_switch, |
| int* min_log_level); |
| ~VlogInfo(); |
| |
| // Returns the vlog level for a given file (usually taken from |
| // __FILE__). |
| int GetVlogLevel(const base::StringPiece& file) const; |
| |
| static const int kDefaultVlogLevel; |
| |
| private: |
| void SetMaxVlogLevel(int level); |
| int GetMaxVlogLevel() const; |
| |
| // VmodulePattern holds all the information for each pattern parsed |
| // from |vmodule_switch|. |
| struct VmodulePattern { |
| enum MatchTarget { MATCH_MODULE, MATCH_FILE }; |
| |
| explicit VmodulePattern(const std::string& pattern); |
| |
| VmodulePattern(); |
| |
| std::string pattern; |
| int vlog_level; |
| MatchTarget match_target; |
| }; |
| |
| std::vector<VmodulePattern> vmodule_levels_; |
| int* min_log_level_; |
| |
| DISALLOW_COPY_AND_ASSIGN(VlogInfo); |
| }; |
| |
| // Returns true if the string passed in matches the vlog pattern. The |
| // vlog pattern string can contain wildcards like * and ?. ? matches |
| // exactly one character while * matches 0 or more characters. Also, |
| // as a special case, a / or \ character matches either / or \. |
| // |
| // Examples: |
| // "kh?n" matches "khan" but not "khn" or "khaan" |
| // "kh*n" matches "khn", "khan", or even "khaaaaan" |
| // "/foo\bar" matches "/foo/bar", "\foo\bar", or "/foo\bar" |
| // (disregarding C escaping rules) |
| bool MatchVlogPattern(const base::StringPiece& string, |
| const base::StringPiece& vlog_pattern); |
| |
| } // namespace logging |
| |
| #endif // BASE_VLOG_H_ |