src/hotspot/share/logging/logLevel.cpp
author mlarsson
Mon, 26 Feb 2018 09:34:20 +0100
changeset 49163 580bb0b85f63
parent 47216 71c04702a3d5
permissions -rw-r--r--
8198554: Add fuzzy matching for log levels and tags when parsing -Xlog Reviewed-by: hseigel, coleenp
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/*
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 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 *
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 */
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#include "precompiled.hpp"
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#include "logging/logLevel.hpp"
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#include "utilities/globalDefinitions.hpp"
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#include "utilities/stringUtils.hpp"
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const char* LogLevel::_name[] = {
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  "off",
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#define LOG_LEVEL(name, printname) #printname,
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  LOG_LEVEL_LIST
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#undef LOG_LEVEL
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};
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LogLevelType LogLevel::from_string(const char* str) {
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  for (uint i = 0; i < Count; i++) {
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    if (strcasecmp(str, _name[i]) == 0) {
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      return static_cast<LogLevelType>(i);
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    }
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  }
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  return Invalid;
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}
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LogLevelType LogLevel::fuzzy_match(const char *level) {
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  size_t len = strlen(level);
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  LogLevelType match = LogLevel::Invalid;
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  double best = 0.4; // required similarity to be considered a match
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  for (uint i = 1; i < Count; i++) {
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    LogLevelType cur = static_cast<LogLevelType>(i);
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    const char* levelname = LogLevel::name(cur);
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    double score = StringUtils::similarity(level, len, levelname, strlen(levelname));
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    if (score >= best) {
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      match = cur;
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      best= score;
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    }
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  }
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  return match;
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}