Repo created

TMessagesProj/jni/voip/webrtc/base/vlog.h

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+// Copyright (c) 2011 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_
+
+#include <string>
+#include <vector>
+
+#include "base/base_export.h"
+#include "base/macros.h"
+#include "base/strings/string_piece.h"
+
+namespace logging {
+
+// A helper class containing all the settings for vlogging.
+class BASE_EXPORT VlogInfo {
+ public:
+  static const int kDefaultVlogLevel;
+
+  // |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;
+
+ private:
+  void SetMaxVlogLevel(int level);
+  int GetMaxVlogLevel() const;
+
+  // VmodulePattern holds all the information for each pattern parsed
+  // from |vmodule_switch|.
+  struct VmodulePattern;
+  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)
+BASE_EXPORT bool MatchVlogPattern(const base::StringPiece& string,
+                                  const base::StringPiece& vlog_pattern);
+
+}  // namespace logging
+
+#endif  // BASE_VLOG_H_