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
  33 void log_add_output(ILogOutput *out, enum LogMessageLevel lev)
  34 {
  35         log_outputs[lev].push_back(out);
  36 }
  37
  38 void log_add_output_maxlev(ILogOutput *out, enum LogMessageLevel lev)
  39 {
  40         for(int i=0; i<=lev; i++)
  41                 log_outputs[i].push_back(out);
  42 }
  43
  44 void log_add_output_all_levs(ILogOutput *out)
  45 {
  46         for(int i=0; i<LMT_NUM_VALUES; i++)
  47                 log_outputs[i].push_back(out);
  48 }
  49
  50 void log_remove_output(ILogOutput *out)
  51 {
  52         for(int i=0; i<LMT_NUM_VALUES; i++){
  53                 std::list<ILogOutput*>::iterator it =
  54                                 std::find(log_outputs[i].begin(), log_outputs[i].end(), out);
  55                 if(it != log_outputs[i].end())
  56                         log_outputs[i].erase(it);
  57         }
  58 }
  59
  60 void log_register_thread(const std::string &name)
  61 {
  62         threadid_t id = get_current_thread_id();
  63         log_threadnames[id] = name;
  64 }
  65
  66 void log_deregister_thread()
  67 {
  68         threadid_t id = get_current_thread_id();
  69         log_threadnames.erase(id);
  70 }
  71
  72 static std::string get_lev_string(enum LogMessageLevel lev)
  73 {
  74         switch(lev){
  75         case LMT_ERROR:
  76                 return "ERROR";
  77         case LMT_ACTION:
  78                 return "ACTION";
  79         case LMT_INFO:
  80                 return "INFO";
  81         case LMT_VERBOSE:
  82                 return "VERBOSE";
  83         case LMT_NUM_VALUES:
  84                 break;
  85         }
  86         return "(unknown level)";
  87 }
  88
  89 void log_printline(enum LogMessageLevel lev, const std::string &text)
  90 {
  91         std::string threadname = "(unknown thread)";
  92         std::map<threadid_t, std::string>::const_iterator i;
  93         i = log_threadnames.find(get_current_thread_id());
  94         if(i != log_threadnames.end())
  95                 threadname = i->second;
  96         std::string levelname = get_lev_string(lev);
  97         std::ostringstream os(std::ios_base::binary);
  98         os<<getTimestamp()<<": "<<levelname<<"["<<threadname<<"]: "<<text;
  99         for(std::list<ILogOutput*>::iterator i = log_outputs[lev].begin();
 100                         i != log_outputs[lev].end(); i++){
 101                 ILogOutput *out = *i;
 102                 out->printLog(os.str());
 103                 out->printLog(os.str(), lev);
 104                 out->printLog(lev, text);
 105         }
 106 }
 107
 108 class Logbuf : public std::streambuf
 109 {
 110 public:
 111         Logbuf(enum LogMessageLevel lev):
 112                 m_lev(lev)
 113         {
 114         }
 115
 116         ~Logbuf()
 117         {
 118         }
 119
 120         int overflow(int c)
 121         {
 122                 bufchar(c);
 123                 return c;
 124         }
 125         std::streamsize xsputn(const char *s, std::streamsize n)
 126         {
 127                 for(int i=0; i<n; i++)
 128                         bufchar(s[i]);
 129                 return n;
 130         }
 131
 132         void printbuf()
 133         {
 134                 log_printline(m_lev, m_buf);
 135         }
 136
 137         void bufchar(char c)
 138         {
 139                 if(c == '\n' || c == '\r'){
 140                         if(m_buf != "")
 141                                 printbuf();
 142                         m_buf = "";
 143                         return;
 144                 }
 145                 m_buf += c;
 146         }
 147
 148 private:
 149         enum LogMessageLevel m_lev;
 150         std::string m_buf;
 151 };
 152
 153 Logbuf errorbuf(LMT_ERROR);
 154 Logbuf actionbuf(LMT_ACTION);
 155 Logbuf infobuf(LMT_INFO);
 156 Logbuf verbosebuf(LMT_VERBOSE);
 157 std::ostream errorstream(&errorbuf);
 158 std::ostream actionstream(&actionbuf);
 159 std::ostream infostream(&infobuf);
 160 std::ostream verbosestream(&verbosebuf);
 161
 162 bool log_trace_level_enabled = false;
 163