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78 lines
2.6 KiB
C++
78 lines
2.6 KiB
C++
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef BASE_VLOG_H_
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#define BASE_VLOG_H_
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#include <string>
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#include <vector>
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#include "base/base_export.h"
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#include "base/macros.h"
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#include "base/strings/string_piece.h"
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namespace logging {
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// A helper class containing all the settings for vlogging.
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class BASE_EXPORT VlogInfo {
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public:
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static const int kDefaultVlogLevel;
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// |v_switch| gives the default maximal active V-logging level; 0 is
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// the default. Normally positive values are used for V-logging
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// levels.
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//
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// |vmodule_switch| gives the per-module maximal V-logging levels to
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// override the value given by |v_switch|.
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// E.g. "my_module=2,foo*=3" would change the logging level for all
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// code in source files "my_module.*" and "foo*.*" ("-inl" suffixes
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// are also disregarded for this matching).
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//
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// |log_severity| points to an int that stores the log level. If a valid
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// |v_switch| is provided, it will set the log level, and the default
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// vlog severity will be read from there..
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//
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// Any pattern containing a forward or backward slash will be tested
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// against the whole pathname and not just the module. E.g.,
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// "*/foo/bar/*=2" would change the logging level for all code in
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// source files under a "foo/bar" directory.
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VlogInfo(const std::string& v_switch,
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const std::string& vmodule_switch,
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int* min_log_level);
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~VlogInfo();
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// Returns the vlog level for a given file (usually taken from
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// __FILE__).
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int GetVlogLevel(const base::StringPiece& file) const;
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private:
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void SetMaxVlogLevel(int level);
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int GetMaxVlogLevel() const;
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// VmodulePattern holds all the information for each pattern parsed
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// from |vmodule_switch|.
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struct VmodulePattern;
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std::vector<VmodulePattern> vmodule_levels_;
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int* min_log_level_;
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DISALLOW_COPY_AND_ASSIGN(VlogInfo);
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};
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// Returns true if the string passed in matches the vlog pattern. The
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// vlog pattern string can contain wildcards like * and ?. ? matches
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// exactly one character while * matches 0 or more characters. Also,
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// as a special case, a / or \ character matches either / or \.
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//
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// Examples:
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// "kh?n" matches "khan" but not "khn" or "khaan"
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// "kh*n" matches "khn", "khan", or even "khaaaaan"
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// "/foo\bar" matches "/foo/bar", "\foo\bar", or "/foo\bar"
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// (disregarding C escaping rules)
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BASE_EXPORT bool MatchVlogPattern(const base::StringPiece& string,
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const base::StringPiece& vlog_pattern);
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} // namespace logging
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#endif // BASE_VLOG_H_
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