[89] | 1 | /*
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| 2 | * Licensed to the Apache Software Foundation (ASF) under one or more
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| 3 | * contributor license agreements. See the NOTICE file distributed with
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| 4 | * this work for additional information regarding copyright ownership.
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| 5 | * The ASF licenses this file to You under the Apache License, Version 2.0
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| 6 | * (the "License"); you may not use this file except in compliance with
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| 7 | * the License. You may obtain a copy of the License at
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| 8 | *
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| 9 | * http://www.apache.org/licenses/LICENSE-2.0
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| 10 | *
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| 11 | * Unless required by applicable law or agreed to in writing, software
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| 12 | * distributed under the License is distributed on an "AS IS" BASIS,
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| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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| 14 | * See the License for the specific language governing permissions and
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| 15 | * limitations under the License.
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| 16 | */
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| 17 |
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| 18 |
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| 19 | #ifndef _LOG4CXX_HELPER_PATTERN_CONVERTER_H
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| 20 | #define _LOG4CXX_HELPER_PATTERN_CONVERTER_H
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| 21 |
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| 22 | #if defined(_MSC_VER)
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| 23 | #pragma warning (push)
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| 24 | #pragma warning ( disable: 4231 4251 4275 4786 )
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| 25 | #endif
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| 26 |
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| 27 |
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| 28 |
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| 29 | #include <map>
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| 30 | #include <vector>
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| 31 | #include <log4cxx/helpers/class.h>
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| 32 | #include <log4cxx/pattern/patternconverter.h>
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| 33 | #include <log4cxx/pattern/formattinginfo.h>
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| 34 |
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| 35 | namespace log4cxx {
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| 36 | namespace pattern {
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| 37 |
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| 38 | typedef PatternConverterPtr (*PatternConstructor)(const std::vector<LogString>& options);
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| 39 | typedef std::map<LogString, PatternConstructor> PatternMap;
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| 40 |
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| 41 |
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| 42 | // Contributors: Nelson Minar <(nelson@monkey.org>
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| 43 | // Igor E. Poteryaev <jah@mail.ru>
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| 44 | // Reinhard Deschler <reinhard.deschler@web.de>
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| 45 |
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| 46 | /**
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| 47 | * Most of the work of the {@link log4cxx::PatternLayout PatternLayout} class
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| 48 | * is delegated to the PatternParser class.
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| 49 | * <p>It is this class that parses conversion patterns and creates
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| 50 | * a chained list of {@link PatternConverter PatternConverters}.
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| 51 | *
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| 52 | *
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| 53 | */
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| 54 | class LOG4CXX_EXPORT PatternParser {
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| 55 | /**
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| 56 | * Escape character for format specifier.
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| 57 | */
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| 58 | static const logchar ESCAPE_CHAR;
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| 59 |
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| 60 | enum {
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| 61 | LITERAL_STATE = 0,
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| 62 | CONVERTER_STATE = 1,
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| 63 | DOT_STATE = 3,
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| 64 | MIN_STATE = 4,
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| 65 | MAX_STATE = 5
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| 66 | };
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| 67 |
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| 68 | /**
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| 69 | * Private constructor.
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| 70 | */
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| 71 | PatternParser();
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| 72 |
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| 73 | private:
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| 74 | /** Extract the converter identifier found at position i.
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| 75 | *
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| 76 | * After this function returns, the variable i will point to the
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| 77 | * first char after the end of the converter identifier.
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| 78 | *
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| 79 | * If i points to a char which is not a character acceptable at the
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| 80 | * start of a unicode identifier, the value null is returned.
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| 81 | *
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| 82 | * @param lastChar last processed character.
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| 83 | * @param pattern format string.
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| 84 | * @param i current index into pattern format.
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| 85 | * @param convBuf buffer to receive conversion specifier.
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| 86 | * @param currentLiteral literal to be output in case format specifier in unrecognized.
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| 87 | * @return position in pattern after converter.
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| 88 | */
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| 89 | static int extractConverter(
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| 90 | logchar lastChar, const LogString& pattern,
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| 91 | LogString::size_type i, LogString& convBuf,
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| 92 | LogString& currentLiteral);
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| 93 |
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| 94 | /**
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| 95 | * Extract options.
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| 96 | * @param pattern conversion pattern.
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| 97 | * @param i start of options.
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| 98 | * @param options array to receive extracted options
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| 99 | * @return position in pattern after options.
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| 100 | */
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| 101 | static int extractOptions(const LogString& pattern, LogString::size_type i,
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| 102 | std::vector<LogString>& options);
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| 103 |
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| 104 | public:
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| 105 | /**
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| 106 | * Parse a format specifier.
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| 107 | * @param pattern pattern to parse.
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| 108 | * @param patternConverters list to receive pattern converters.
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| 109 | * @param formattingInfos list to receive field specifiers corresponding to pattern converters.
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| 110 | * @param rules map of stock pattern converters keyed by format specifier.
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| 111 | */
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| 112 | static void parse(
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| 113 | const LogString& pattern,
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| 114 | std::vector<PatternConverterPtr>& patternConverters,
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| 115 | std::vector<FormattingInfoPtr>& formattingInfos,
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| 116 | const PatternMap& rules);
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| 117 |
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| 118 | private:
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| 119 | /**
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| 120 | * Creates a new PatternConverter.
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| 121 | *
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| 122 | *
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| 123 | * @param converterId converterId.
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| 124 | * @param currentLiteral literal to be used if converter is unrecognized or following converter
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| 125 | * if converterId contains extra characters.
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| 126 | * @param rules map of stock pattern converters keyed by format specifier.
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| 127 | * @param options converter options.
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| 128 | * @return converter or null.
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| 129 | */
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| 130 | static PatternConverterPtr createConverter(
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| 131 | const LogString& converterId,
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| 132 | LogString& currentLiteral,
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| 133 | const PatternMap& rules,
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| 134 | std::vector<LogString>& options);
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| 135 |
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| 136 | /**
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| 137 | * Processes a format specifier sequence.
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| 138 | *
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| 139 | * @param c initial character of format specifier.
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| 140 | * @param pattern conversion pattern
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| 141 | * @param i current position in conversion pattern.
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| 142 | * @param currentLiteral current literal.
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| 143 | * @param formattingInfo current field specifier.
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| 144 | * @param rules map of stock pattern converters keyed by format specifier.
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| 145 | * @param patternConverters list to receive parsed pattern converter.
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| 146 | * @param formattingInfos list to receive corresponding field specifier.
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| 147 | * @return position after format specifier sequence.
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| 148 | */
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| 149 | static int finalizeConverter(
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| 150 | logchar c, const LogString& pattern, int i,
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| 151 | LogString& currentLiteral, const FormattingInfoPtr& formattingInfo,
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| 152 | const PatternMap& rules,
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| 153 | std::vector<PatternConverterPtr>& patternConverters,
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| 154 | std::vector<FormattingInfoPtr>& formattingInfos);
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| 155 |
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| 156 | static bool isUnicodeIdentifierStart(logchar c);
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| 157 | static bool isUnicodeIdentifierPart(logchar c);
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| 158 |
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| 159 |
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| 160 | };
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| 161 |
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| 162 | }
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| 163 | }
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| 164 |
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| 165 |
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| 166 | #if defined(_MSC_VER)
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| 167 | #pragma warning (pop)
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| 168 | #endif
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| 169 |
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| 170 |
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| 171 | #endif
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