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| 1 // Copyright (c) 2011 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 | |
| 8 #include <string> | |
| 9 #include <vector> | |
| 10 | |
| 11 #include "base/base_export.h" | |
| 12 #include "base/basictypes.h" | |
| 13 #include "base/strings/string_piece.h" | |
| 14 | |
| 15 namespace logging { | |
| 16 | |
| 17 // A helper class containing all the settings for vlogging. | |
| 18 class BASE_EXPORT VlogInfo { | |
| 19 public: | |
| 20 static const int kDefaultVlogLevel; | |
| 21 | |
| 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 // | |
| 32 // |log_severity| points to an int that stores the log level. If a valid | |
| 33 // |v_switch| is provided, it will set the log level, and the default | |
| 34 // vlog severity will be read from there.. | |
| 35 // | |
| 36 // Any pattern containing a forward or backward slash will be tested | |
| 37 // against the whole pathname and not just the module. E.g., | |
| 38 // "*/foo/bar/*=2" would change the logging level for all code in | |
| 39 // source files under a "foo/bar" directory. | |
| 40 VlogInfo(const std::string& v_switch, | |
| 41 const std::string& vmodule_switch, | |
| 42 int* min_log_level); | |
| 43 ~VlogInfo(); | |
| 44 | |
| 45 // Returns the vlog level for a given file (usually taken from | |
| 46 // __FILE__). | |
| 47 int GetVlogLevel(const base::StringPiece& file) const; | |
| 48 | |
| 49 private: | |
| 50 void SetMaxVlogLevel(int level); | |
| 51 int GetMaxVlogLevel() const; | |
| 52 | |
| 53 // VmodulePattern holds all the information for each pattern parsed | |
| 54 // from |vmodule_switch|. | |
| 55 struct VmodulePattern; | |
| 56 std::vector<VmodulePattern> vmodule_levels_; | |
| 57 int* min_log_level_; | |
| 58 | |
| 59 DISALLOW_COPY_AND_ASSIGN(VlogInfo); | |
| 60 }; | |
| 61 | |
| 62 // Returns true if the string passed in matches the vlog pattern. The | |
| 63 // vlog pattern string can contain wildcards like * and ?. ? matches | |
| 64 // exactly one character while * matches 0 or more characters. Also, | |
| 65 // as a special case, a / or \ character matches either / or \. | |
| 66 // | |
| 67 // Examples: | |
| 68 // "kh?n" matches "khan" but not "khn" or "khaan" | |
| 69 // "kh*n" matches "khn", "khan", or even "khaaaaan" | |
| 70 // "/foo\bar" matches "/foo/bar", "\foo\bar", or "/foo\bar" | |
| 71 // (disregarding C escaping rules) | |
| 72 BASE_EXPORT bool MatchVlogPattern(const base::StringPiece& string, | |
| 73 const base::StringPiece& vlog_pattern); | |
| 74 | |
| 75 } // namespace logging | |
| 76 | |
| 77 #endif // BASE_VLOG_H_ | |
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