src/log.cpp

   1 /*
   2 Minetest
   3 Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
   4
   5 This program is free software; you can redistribute it and/or modify
   6 it under the terms of the GNU Lesser General Public License as published by
   7 the Free Software Foundation; either version 2.1 of the License, or
   8 (at your option) any later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU Lesser General Public License for more details.
  14
  15 You should have received a copy of the GNU Lesser General Public License along
  16 with this program; if not, write to the Free Software Foundation, Inc.,
  17 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "log.h"
  21
  22 #include <map>
  23 #include <list>
  24 #include <sstream>
  25 #include <algorithm>
  26 #include "threads.h"
  27 #include "debug.h"
  28 #include "gettime.h"
  29
  30 std::list<ILogOutput*> log_outputs[LMT_NUM_VALUES];
  31 std::map<threadid_t, std::string> log_threadnames;
  32 JMutex                            log_threadnamemutex;
  33
  34 void log_add_output(ILogOutput *out, enum LogMessageLevel lev)
  35 {
  36         log_outputs[lev].push_back(out);
  37 }
  38
  39 void log_add_output_maxlev(ILogOutput *out, enum LogMessageLevel lev)
  40 {
  41         for(int i=0; i<=lev; i++)
  42                 log_outputs[i].push_back(out);
  43 }
  44
  45 void log_add_output_all_levs(ILogOutput *out)
  46 {
  47         for(int i=0; i<LMT_NUM_VALUES; i++)
  48                 log_outputs[i].push_back(out);
  49 }
  50
  51 void log_remove_output(ILogOutput *out)
  52 {
  53         for(int i=0; i<LMT_NUM_VALUES; i++){
  54                 std::list<ILogOutput*>::iterator it =
  55                                 std::find(log_outputs[i].begin(), log_outputs[i].end(), out);
  56                 if(it != log_outputs[i].end())
  57                         log_outputs[i].erase(it);
  58         }
  59 }
  60
  61 void log_register_thread(const std::string &name)
  62 {
  63         threadid_t id = get_current_thread_id();
  64         log_threadnamemutex.Lock();
  65         log_threadnames[id] = name;
  66         log_threadnamemutex.Unlock();
  67 }
  68
  69 void log_deregister_thread()
  70 {
  71         threadid_t id = get_current_thread_id();
  72         log_threadnamemutex.Lock();
  73         log_threadnames.erase(id);
  74         log_threadnamemutex.Unlock();
  75 }
  76
  77 static std::string get_lev_string(enum LogMessageLevel lev)
  78 {
  79         switch(lev){
  80         case LMT_ERROR:
  81                 return "ERROR";
  82         case LMT_ACTION:
  83                 return "ACTION";
  84         case LMT_INFO:
  85                 return "INFO";
  86         case LMT_VERBOSE:
  87                 return "VERBOSE";
  88         case LMT_NUM_VALUES:
  89                 break;
  90         }
  91         return "(unknown level)";
  92 }
  93
  94 void log_printline(enum LogMessageLevel lev, const std::string &text)
  95 {
  96         log_threadnamemutex.Lock();
  97         std::string threadname = "(unknown thread)";
  98         std::map<threadid_t, std::string>::const_iterator i;
  99         i = log_threadnames.find(get_current_thread_id());
 100         if(i != log_threadnames.end())
 101                 threadname = i->second;
 102         std::string levelname = get_lev_string(lev);
 103         std::ostringstream os(std::ios_base::binary);
 104         os<<getTimestamp()<<": "<<levelname<<"["<<threadname<<"]: "<<text;
 105         for(std::list<ILogOutput*>::iterator i = log_outputs[lev].begin();
 106                         i != log_outputs[lev].end(); i++){
 107                 ILogOutput *out = *i;
 108                 out->printLog(os.str());
 109                 out->printLog(os.str(), lev);
 110                 out->printLog(lev, text);
 111         }
 112         log_threadnamemutex.Unlock();
 113 }
 114
 115 class Logbuf : public std::streambuf
 116 {
 117 public:
 118         Logbuf(enum LogMessageLevel lev):
 119                 m_lev(lev)
 120         {
 121         }
 122
 123         ~Logbuf()
 124         {
 125         }
 126
 127         int overflow(int c)
 128         {
 129                 bufchar(c);
 130                 return c;
 131         }
 132         std::streamsize xsputn(const char *s, std::streamsize n)
 133         {
 134                 for(int i=0; i<n; i++)
 135                         bufchar(s[i]);
 136                 return n;
 137         }
 138
 139         void printbuf()
 140         {
 141                 log_printline(m_lev, m_buf);
 142         }
 143
 144         void bufchar(char c)
 145         {
 146                 if(c == '\n' || c == '\r'){
 147                         if(m_buf != "")
 148                                 printbuf();
 149                         m_buf = "";
 150                         return;
 151                 }
 152                 m_buf += c;
 153         }
 154
 155 private:
 156         enum LogMessageLevel m_lev;
 157         std::string m_buf;
 158 };
 159
 160 Logbuf errorbuf(LMT_ERROR);
 161 Logbuf actionbuf(LMT_ACTION);
 162 Logbuf infobuf(LMT_INFO);
 163 Logbuf verbosebuf(LMT_VERBOSE);
 164 std::ostream errorstream(&errorbuf);
 165 std::ostream actionstream(&actionbuf);
 166 std::ostream infostream(&infobuf);
 167 std::ostream verbosestream(&verbosebuf);
 168
 169 bool log_trace_level_enabled = false;
 170