[2] | 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 | #ifndef _LOG4CXX_STREAM_H
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| 19 | #define _LOG4CXX_STREAM_H
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| 20 |
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| 21 | #include <log4cxx/logger.h>
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| 22 | #include <sstream>
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| 23 | #include <log4cxx/spi/location/locationinfo.h>
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| 24 |
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| 25 | namespace log4cxx
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| 26 | {
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| 27 |
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| 28 | /**
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| 29 | * Base class for the basic_logstream template which attempts
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| 30 | * to emulate std::basic_ostream but attempts to short-circuit
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| 31 | * unnecessary operations.
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| 32 | *
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| 33 | * The logstream has a logger and level that are used for logging
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| 34 | * requests. The level of the stream is compared against the
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| 35 | * current level of the logger to determine if the request should be processed.
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| 36 | */
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| 37 | class LOG4CXX_EXPORT logstream_base {
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| 38 | public:
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| 39 | /**
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| 40 | * Create new instance.
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| 41 | * @param logger logger logger used in log requests.
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| 42 | * @param level indicates level that will be used in log requests. Can
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| 43 | * be modified later by inserting a level or calling setLevel.
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| 44 | */
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| 45 | logstream_base(const log4cxx::LoggerPtr& logger,
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| 46 | const log4cxx::LevelPtr& level);
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| 47 | /**
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| 48 | * Destructor.
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| 49 | */
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| 50 | virtual ~logstream_base();
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| 51 | /**
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| 52 | * Insertion operator for std::fixed and similar manipulators.
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| 53 | */
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| 54 | void insert(std::ios_base& (*manip)(std::ios_base&));
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| 55 |
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| 56 | /**
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| 57 | * get precision.
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| 58 | */
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| 59 | int precision();
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| 60 | /**
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| 61 | * get width.
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| 62 | */
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| 63 | int width();
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| 64 | /**
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| 65 | * set precision. This should be used in preference to inserting an std::setprecision(n)
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| 66 | * since the other requires construction of an STL stream which may be expensive.
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| 67 | */
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| 68 | int precision(int newval);
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| 69 | /**
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| 70 | * set width. This should be used in preference to inserting an std::setw(n)
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| 71 | * since the other requires construction of an STL stream which may be expensive.
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| 72 | */
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| 73 | int width(int newval);
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| 74 | /**
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| 75 | * Get fill character.
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| 76 | */
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| 77 | int fill();
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| 78 | /**
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| 79 | * Set fill character.
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| 80 | */
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| 81 | int fill(int newval);
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| 82 |
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| 83 | /**
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| 84 | * Set flags. see std::ios_base.
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| 85 | */
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| 86 | std::ios_base::fmtflags flags(std::ios_base::fmtflags newflags);
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| 87 | /**
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| 88 | * Set flags. see std::ios_base.
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| 89 | */
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| 90 | std::ios_base::fmtflags setf(std::ios_base::fmtflags newflags, std::ios_base::fmtflags mask);
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| 91 | /**
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| 92 | * Set flags. see std::ios_base.
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| 93 | */
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| 94 | std::ios_base::fmtflags setf(std::ios_base::fmtflags newflags);
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| 95 |
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| 96 |
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| 97 | /**
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| 98 | * end of message manipulator, triggers logging.
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| 99 | */
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| 100 | static logstream_base& endmsg(logstream_base&);
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| 101 |
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| 102 | /**
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| 103 | * no-operation manipulator, Used to avoid ambiguity with VC6.
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| 104 | */
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| 105 | static logstream_base& nop(logstream_base&);
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| 106 |
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| 107 | /**
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| 108 | * end of message action.
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| 109 | */
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| 110 | void end_message();
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| 111 |
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| 112 |
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| 113 |
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| 114 | /**
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| 115 | * Set the level.
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| 116 | * @param level level
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| 117 | */
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| 118 | void setLevel(const LevelPtr& level);
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| 119 | /**
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| 120 | * Returns true if the current level is the same or high as the
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| 121 | * level of logger at time of construction or last setLevel.
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| 122 | */
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| 123 | inline bool isEnabled() const {
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| 124 | return enabled;
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| 125 | }
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| 126 |
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| 127 | /**
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| 128 | * Returns if logger is currently enabled for the specified level.
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| 129 | */
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| 130 | bool isEnabledFor(const LevelPtr& level) const;
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| 131 |
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| 132 | /**
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| 133 | * Sets the location for subsequent log requests.
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| 134 | */
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| 135 | void setLocation(const log4cxx::spi::LocationInfo& location);
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| 136 |
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| 137 | /**
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| 138 | * Sets the state of the embedded stream (if any)
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| 139 | * to the state of the formatting info.
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| 140 | * @param os stream to receive formatting info.
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| 141 | * @param fillchar receives fill charater.
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| 142 | * @return true if fill character was specified.
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| 143 | */
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| 144 | bool set_stream_state(std::ios_base& os, int& fillchar);
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| 145 |
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| 146 | protected:
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| 147 | /**
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| 148 | * Dispatches the pending log request.
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| 149 | */
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| 150 | virtual void log(LoggerPtr& logger,
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| 151 | const LevelPtr& level,
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| 152 | const log4cxx::spi::LocationInfo& location) = 0;
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| 153 | /**
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| 154 | * Erase any content in the message construction buffer.
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| 155 | */
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| 156 | virtual void erase() = 0;
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| 157 | /**
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| 158 | * Copy state of embedded stream (if any)
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| 159 | * to value and mask instances of std::ios_base
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| 160 | * and return fill character value.
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| 161 | */
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| 162 | virtual void get_stream_state(std::ios_base& base,
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| 163 | std::ios_base& mask,
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| 164 | int& fill,
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| 165 | bool& fillSet) const = 0;
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| 166 | virtual void refresh_stream_state() = 0;
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| 167 |
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| 168 | private:
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| 169 | /**
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| 170 | * prevent copy constructor.
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| 171 | */
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| 172 | logstream_base(logstream_base&);
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| 173 | /**
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| 174 | * prevent copy operatpr.
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| 175 | */
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| 176 | logstream_base& operator=(logstream_base&);
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| 177 | /**
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| 178 | * Minimal extension of std::ios_base to allow creation
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| 179 | * of embedded IO states.
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| 180 | */
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| 181 | class LOG4CXX_EXPORT logstream_ios_base : public std::ios_base {
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| 182 | public:
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| 183 | logstream_ios_base(std::ios_base::fmtflags initval,
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| 184 | int initsize);
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| 185 | } initset, initclear;
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| 186 | /**
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| 187 | * fill character.
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| 188 | */
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| 189 | int fillchar;
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| 190 | /**
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| 191 | * true if fill character is set.
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| 192 | */
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| 193 | bool fillset;
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| 194 | /**
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| 195 | * true if assigned level was same or higher than level of associated logger.
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| 196 | */
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| 197 | bool enabled;
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| 198 | /**
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| 199 | * associated logger.
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| 200 | */
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| 201 | log4cxx::LoggerPtr logger;
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| 202 | /**
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| 203 | * associated level.
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| 204 | */
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| 205 | log4cxx::LevelPtr level;
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| 206 | /**
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| 207 | * associated level.
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| 208 | */
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| 209 | log4cxx::spi::LocationInfo location;
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| 210 | };
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| 211 |
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| 212 | typedef logstream_base& (*logstream_manipulator)(logstream_base&);
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| 213 |
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| 214 | /**
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| 215 | * An STL-like stream API for log4cxx using char as the character type.
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| 216 | *. Instances of log4cxx::logstream
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| 217 | * are not designedfor use by multiple threads and in general should be short-lived
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| 218 | * function scoped objects. Using log4cxx::basic_logstream as a class member or
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| 219 | * static instance should be avoided in the same manner as you would avoid placing a std::ostringstream
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| 220 | * in those locations. Insertion operations are generally short-circuited if the
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| 221 | * level for the stream is not the same of higher that the level of the associated logger.
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| 222 | */
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| 223 | class LOG4CXX_EXPORT logstream : public logstream_base {
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| 224 | typedef char Ch;
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| 225 | public:
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| 226 | /**
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| 227 | * Constructor.
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| 228 | */
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| 229 | logstream(const log4cxx::LoggerPtr& logger,
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| 230 | const log4cxx::LevelPtr& level);
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| 231 |
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| 232 | /**
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| 233 | * Constructor.
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| 234 | */
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| 235 | logstream(const Ch* loggerName,
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| 236 | const log4cxx::LevelPtr& level);
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| 237 |
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| 238 | /**
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| 239 | * Constructor.
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| 240 | */
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| 241 | logstream(const std::basic_string<Ch>& loggerName,
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| 242 | const log4cxx::LevelPtr& level);
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| 243 |
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| 244 | ~logstream();
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| 245 |
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| 246 | /**
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| 247 | * Insertion operator for std::fixed and similar manipulators.
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| 248 | */
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| 249 | logstream& operator<<(std::ios_base& (*manip)(std::ios_base&));
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| 250 |
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| 251 | /**
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| 252 | * Insertion operator for logstream_base::endmsg.
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| 253 | */
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| 254 | logstream& operator<<(logstream_manipulator manip);
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| 255 |
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| 256 | /**
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| 257 | * Insertion operator for level.
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| 258 | */
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| 259 | logstream& operator<<(const log4cxx::LevelPtr& level);
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| 260 | /**
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| 261 | * Insertion operator for location.
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| 262 | */
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| 263 | logstream& operator<<(const log4cxx::spi::LocationInfo& location);
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| 264 |
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| 265 | /**
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| 266 | * Alias for insertion operator for location. Kludge to avoid
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| 267 | * inappropriate compiler ambiguity.
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| 268 | */
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| 269 | logstream& operator>>(const log4cxx::spi::LocationInfo& location);
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| 270 |
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| 271 | /**
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| 272 | * Cast operator to provide access to embedded std::basic_ostream.
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| 273 | */
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| 274 | operator std::basic_ostream<Ch>&();
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| 275 |
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| 276 | #if !(LOG4CXX_USE_GLOBAL_SCOPE_TEMPLATE)
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| 277 | /**
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| 278 | * Template to allow any class with an std::basic_ostream inserter
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| 279 | * to be applied to this class.
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| 280 | */
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| 281 | template <class V>
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| 282 | inline log4cxx::logstream& operator<<(const V& val) {
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| 283 | if (LOG4CXX_UNLIKELY(isEnabled())) {
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| 284 | ((std::basic_ostream<char>&) *this) << val;
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| 285 | }
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| 286 | return *this;
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| 287 | }
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| 288 | #endif
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| 289 |
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| 290 |
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| 291 | protected:
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| 292 | virtual void log(LoggerPtr& logger,
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| 293 | const LevelPtr& level,
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| 294 | const log4cxx::spi::LocationInfo& location);
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| 295 |
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| 296 | virtual void erase();
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| 297 |
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| 298 | virtual void get_stream_state(std::ios_base& base,
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| 299 | std::ios_base& mask,
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| 300 | int& fill,
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| 301 | bool& fillSet) const;
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| 302 | virtual void refresh_stream_state();
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| 303 |
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| 304 |
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| 305 | private:
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| 306 | logstream(const logstream&);
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| 307 | logstream& operator=(const logstream&);
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| 308 | std::basic_stringstream<Ch>* stream;
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| 309 |
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| 310 | };
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| 311 |
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| 312 | #if LOG4CXX_WCHAR_T_API
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| 313 | /**
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| 314 | * An STL-like stream API for log4cxx using wchar_t as the character type.
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| 315 | *. Instances of log4cxx::logstream
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| 316 | * are not designedfor use by multiple threads and in general should be short-lived
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| 317 | * function scoped objects. Using log4cxx::basic_logstream as a class member or
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| 318 | * static instance should be avoided in the same manner as you would avoid placing a std::ostringstream
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| 319 | * in those locations. Insertion operations are generally short-circuited if the
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| 320 | * level for the stream is not the same of higher that the level of the associated logger.
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| 321 | */
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| 322 | class LOG4CXX_EXPORT wlogstream : public logstream_base {
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| 323 | typedef wchar_t Ch;
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| 324 | public:
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| 325 | /**
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| 326 | * Constructor.
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| 327 | */
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| 328 | wlogstream(const log4cxx::LoggerPtr& logger,
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| 329 | const log4cxx::LevelPtr& level);
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| 330 |
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| 331 | /**
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| 332 | * Constructor.
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| 333 | */
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| 334 | wlogstream(const Ch* loggerName,
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| 335 | const log4cxx::LevelPtr& level);
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| 336 |
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| 337 | /**
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| 338 | * Constructor.
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| 339 | */
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| 340 | wlogstream(const std::basic_string<Ch>& loggerName,
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| 341 | const log4cxx::LevelPtr& level);
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| 342 |
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| 343 | ~wlogstream();
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| 344 |
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| 345 | /**
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| 346 | * Insertion operator for std::fixed and similar manipulators.
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| 347 | */
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| 348 | wlogstream& operator<<(std::ios_base& (*manip)(std::ios_base&));
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| 349 |
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| 350 | /**
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| 351 | * Insertion operator for logstream_base::endmsg.
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| 352 | */
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| 353 | wlogstream& operator<<(logstream_manipulator manip);
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| 354 |
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| 355 | /**
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| 356 | * Insertion operator for level.
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| 357 | */
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| 358 | wlogstream& operator<<(const log4cxx::LevelPtr& level);
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| 359 | /**
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| 360 | * Insertion operator for location.
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| 361 | */
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| 362 | wlogstream& operator<<(const log4cxx::spi::LocationInfo& location);
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| 363 |
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| 364 | /**
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| 365 | * Alias for insertion operator for location. Kludge to avoid
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| 366 | * inappropriate compiler ambiguity.
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| 367 | */
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| 368 | wlogstream& operator>>(const log4cxx::spi::LocationInfo& location);
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| 369 |
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| 370 |
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| 371 | /**
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| 372 | * Cast operator to provide access to embedded std::basic_ostream.
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| 373 | */
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| 374 | operator std::basic_ostream<Ch>&();
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| 375 |
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| 376 | #if !(LOG4CXX_USE_GLOBAL_SCOPE_TEMPLATE)
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| 377 | /**
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| 378 | * Template to allow any class with an std::basic_ostream inserter
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| 379 | * to be applied to this class.
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| 380 | */
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| 381 | template <class V>
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| 382 | inline log4cxx::wlogstream& operator<<(const V& val) {
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| 383 | if (LOG4CXX_UNLIKELY(isEnabled())) {
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| 384 | ((std::basic_ostream<wchar_t>&) *this) << val;
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| 385 | }
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| 386 | return *this;
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| 387 | }
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| 388 | #endif
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| 389 |
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| 390 | protected:
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| 391 | virtual void log(LoggerPtr& logger,
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| 392 | const LevelPtr& level,
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| 393 | const log4cxx::spi::LocationInfo& location);
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| 394 |
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| 395 | virtual void erase();
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| 396 |
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| 397 | virtual void get_stream_state(std::ios_base& base,
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| 398 | std::ios_base& mask,
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| 399 | int& fill,
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| 400 | bool& fillSet) const;
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| 401 | virtual void refresh_stream_state();
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| 402 |
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| 403 |
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| 404 | private:
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| 405 | wlogstream(const wlogstream&);
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| 406 | wlogstream& operator=(const wlogstream&);
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| 407 | std::basic_stringstream<Ch>* stream;
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| 408 |
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| 409 | };
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| 410 | #endif
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| 411 |
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| 412 | #if LOG4CXX_UNICHAR_API || LOG4CXX_CFSTRING_API
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| 413 | /**
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| 414 | * An STL-like stream API for log4cxx using UniChar as the character type.
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| 415 | *. Instances of log4cxx::logstream
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| 416 | * are not designedfor use by multiple threads and in general should be short-lived
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| 417 | * function scoped objects. Using log4cxx::basic_logstream as a class member or
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| 418 | * static instance should be avoided in the same manner as you would avoid placing a std::ostringstream
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| 419 | * in those locations. Insertion operations are generally short-circuited if the
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| 420 | * level for the stream is not the same of higher that the level of the associated logger.
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| 421 | */
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| 422 | class LOG4CXX_EXPORT ulogstream : public logstream_base {
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| 423 | typedef UniChar Ch;
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| 424 | public:
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| 425 | /**
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| 426 | * Constructor.
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| 427 | */
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| 428 | ulogstream(const log4cxx::LoggerPtr& logger,
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| 429 | const log4cxx::LevelPtr& level);
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| 430 |
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| 431 | #if LOG4CXX_UNICHAR_API
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| 432 | /**
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| 433 | * Constructor.
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| 434 | */
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| 435 | ulogstream(const Ch* loggerName,
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| 436 | const log4cxx::LevelPtr& level);
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| 437 |
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| 438 | /**
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| 439 | * Constructor.
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| 440 | */
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| 441 | ulogstream(const std::basic_string<Ch>& loggerName,
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| 442 | const log4cxx::LevelPtr& level);
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| 443 | #endif
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| 444 |
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| 445 | #if LOG4CXX_CFSTRING_API
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| 446 | ulogstream(const CFStringRef& loggerName,
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| 447 | const log4cxx::LevelPtr& level);
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| 448 | #endif
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| 449 |
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| 450 | ~ulogstream();
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| 451 |
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| 452 | /**
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| 453 | * Insertion operator for std::fixed and similar manipulators.
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| 454 | */
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| 455 | ulogstream& operator<<(std::ios_base& (*manip)(std::ios_base&));
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| 456 |
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| 457 | /**
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| 458 | * Insertion operator for logstream_base::endmsg.
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| 459 | */
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| 460 | ulogstream& operator<<(logstream_manipulator manip);
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| 461 |
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| 462 | /**
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| 463 | * Insertion operator for level.
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| 464 | */
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| 465 | ulogstream& operator<<(const log4cxx::LevelPtr& level);
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| 466 | /**
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| 467 | * Insertion operator for location.
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| 468 | */
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| 469 | ulogstream& operator<<(const log4cxx::spi::LocationInfo& location);
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| 470 |
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| 471 | /**
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| 472 | * Alias for insertion operator for location. Kludge to avoid
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| 473 | * inappropriate compiler ambiguity.
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| 474 | */
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| 475 | ulogstream& operator>>(const log4cxx::spi::LocationInfo& location);
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| 476 |
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| 477 |
|
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| 478 | /**
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| 479 | * Cast operator to provide access to embedded std::basic_ostream.
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| 480 | */
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| 481 | operator std::basic_ostream<Ch>&();
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| 482 |
|
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| 483 | #if !(LOG4CXX_USE_GLOBAL_SCOPE_TEMPLATE)
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| 484 | /**
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| 485 | * Template to allow any class with an std::basic_ostream inserter
|
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| 486 | * to be applied to this class.
|
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| 487 | */
|
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| 488 | template <class V>
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| 489 | inline ulogstream& operator<<(const V& val) {
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| 490 | if (LOG4CXX_UNLIKELY(isEnabled())) {
|
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| 491 | ((std::basic_ostream<Ch>&) *this) << val;
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| 492 | }
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| 493 | return *this;
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| 494 | }
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| 495 | #endif
|
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| 496 |
|
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| 497 | protected:
|
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| 498 | virtual void log(LoggerPtr& logger,
|
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| 499 | const LevelPtr& level,
|
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| 500 | const log4cxx::spi::LocationInfo& location);
|
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| 501 |
|
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| 502 | virtual void erase();
|
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| 503 |
|
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| 504 | virtual void get_stream_state(std::ios_base& base,
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| 505 | std::ios_base& mask,
|
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| 506 | int& fill,
|
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| 507 | bool& fillSet) const;
|
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| 508 | virtual void refresh_stream_state();
|
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| 509 |
|
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| 510 |
|
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| 511 | private:
|
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| 512 | ulogstream(const ulogstream&);
|
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| 513 | ulogstream& operator=(const ulogstream&);
|
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| 514 | std::basic_stringstream<Ch>* stream;
|
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| 515 |
|
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| 516 | };
|
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| 517 | #endif
|
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| 518 |
|
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| 519 |
|
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| 520 | } // namespace log4cxx
|
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| 521 |
|
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| 522 |
|
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| 523 | #if LOG4CXX_USE_GLOBAL_SCOPE_TEMPLATE
|
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| 524 | //
|
---|
| 525 | // VC6 will fail to compile if class-scope templates
|
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| 526 | // are used to handle arbitrary insertion operations.
|
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| 527 | // However, using global namespace insertion operations
|
---|
| 528 | // run into LOGCXX-150.
|
---|
| 529 |
|
---|
| 530 | /**
|
---|
| 531 | * Template to allow any class with an std::basic_ostream inserter
|
---|
| 532 | * to be applied to this class.
|
---|
| 533 | */
|
---|
| 534 | template <class V>
|
---|
| 535 | inline log4cxx::logstream& operator<<(log4cxx::logstream& os, const V& val) {
|
---|
| 536 | if (LOG4CXX_UNLIKELY(os.isEnabled())) {
|
---|
| 537 | ((std::basic_ostream<char>&) os) << val;
|
---|
| 538 | }
|
---|
| 539 | return os;
|
---|
| 540 | }
|
---|
| 541 |
|
---|
| 542 | #if LOG4CXX_WCHAR_T_API
|
---|
| 543 | /**
|
---|
| 544 | * Template to allow any class with an std::basic_ostream inserter
|
---|
| 545 | * to be applied to this class.
|
---|
| 546 | */
|
---|
| 547 | template <class V>
|
---|
| 548 | inline log4cxx::wlogstream& operator<<(log4cxx::wlogstream& os, const V& val) {
|
---|
| 549 | if (LOG4CXX_UNLIKELY(os.isEnabled())) {
|
---|
| 550 | ((std::basic_ostream<wchar_t>&) os) << val;
|
---|
| 551 | }
|
---|
| 552 | return os;
|
---|
| 553 | }
|
---|
| 554 | #endif
|
---|
| 555 | #endif
|
---|
| 556 |
|
---|
| 557 | #if !defined(LOG4CXX_ENDMSG)
|
---|
| 558 | #if LOG4CXX_LOGSTREAM_ADD_NOP
|
---|
| 559 | #define LOG4CXX_ENDMSG (log4cxx::logstream_manipulator) log4cxx::logstream_base::nop >> LOG4CXX_LOCATION << (log4cxx::logstream_manipulator) log4cxx::logstream_base::endmsg
|
---|
| 560 | #else
|
---|
| 561 | #define LOG4CXX_ENDMSG LOG4CXX_LOCATION << (log4cxx::logstream_manipulator) log4cxx::logstream_base::endmsg
|
---|
| 562 | #endif
|
---|
| 563 | #endif
|
---|
| 564 |
|
---|
| 565 |
|
---|
| 566 | #endif //_LOG4CXX_STREAM_H
|
---|