src/log.cpp

   1 /*
   2 Minetest-c55
   3 Copyright (C) 2011 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 General Public License as published by
   7 the Free Software Foundation; either version 2 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 General Public License for more details.
  14
  15 You should have received a copy of the GNU 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 "threads.h"
  26 #include "debug.h"
  27 #include "gettime.h"
  28
  29 std::list<ILogOutput*> log_outputs[LMT_NUM_VALUES];
  30 std::map<threadid_t, std::string> log_threadnames;
  31
  32 void log_add_output(ILogOutput *out, enum LogMessageLevel lev)
  33 {
  34         log_outputs[lev].push_back(out);
  35 }
  36
  37 void log_add_output_maxlev(ILogOutput *out, enum LogMessageLevel lev)
  38 {
  39         for(int i=0; i<=lev; i++)
  40                 log_outputs[i].push_back(out);
  41 }
  42
  43 void log_add_output_all_levs(ILogOutput *out)
  44 {
  45         for(int i=0; i<LMT_NUM_VALUES; i++)
  46                 log_outputs[i].push_back(out);
  47 }
  48
  49 void log_register_thread(const std::string &name)
  50 {
  51         threadid_t id = get_current_thread_id();
  52         log_threadnames[id] = name;
  53 }
  54
  55 static std::string get_lev_string(enum LogMessageLevel lev)
  56 {
  57         switch(lev){
  58         case LMT_ERROR:
  59                 return "ERROR";
  60         case LMT_ACTION:
  61                 return "ACTION";
  62         case LMT_INFO:
  63                 return "INFO";
  64         case LMT_VERBOSE:
  65                 return "VERBOSE";
  66         case LMT_NUM_VALUES:
  67                 break;
  68         }
  69         return "(unknown level)";
  70 }
  71
  72 void log_printline(enum LogMessageLevel lev, const std::string &text)
  73 {
  74         std::string threadname = "(unknown thread)";
  75         std::map<threadid_t, std::string>::const_iterator i;
  76         i = log_threadnames.find(get_current_thread_id());
  77         if(i != log_threadnames.end())
  78                 threadname = i->second;
  79         std::string levelname = get_lev_string(lev);
  80         std::ostringstream os(std::ios_base::binary);
  81         os<<getTimestamp()<<": "<<levelname<<"["<<threadname<<"]: "<<text;
  82         for(std::list<ILogOutput*>::iterator i = log_outputs[lev].begin();
  83                         i != log_outputs[lev].end(); i++){
  84                 ILogOutput *out = *i;
  85                 out->printLog(os.str());
  86                 out->printLog(lev, text);
  87         }
  88 }
  89
  90 class Logbuf : public std::streambuf
  91 {
  92 public:
  93         Logbuf(enum LogMessageLevel lev):
  94                 m_lev(lev)
  95         {
  96         }
  97
  98         ~Logbuf()
  99         {
 100         }
 101
 102         int overflow(int c)
 103         {
 104                 bufchar(c);
 105                 return c;
 106         }
 107         std::streamsize xsputn(const char *s, std::streamsize n)
 108         {
 109                 for(int i=0; i<n; i++)
 110                         bufchar(s[i]);
 111                 return n;
 112         }
 113
 114         void printbuf()
 115         {
 116                 log_printline(m_lev, m_buf);
 117         }
 118
 119         void bufchar(char c)
 120         {
 121                 if(c == '\n' || c == '\r'){
 122                         if(m_buf != "")
 123                                 printbuf();
 124                         m_buf = "";
 125                         return;
 126                 }
 127                 m_buf += c;
 128         }
 129
 130 private:
 131         enum LogMessageLevel m_lev;
 132         std::string m_buf;
 133 };
 134
 135 Logbuf errorbuf(LMT_ERROR);
 136 Logbuf actionbuf(LMT_ACTION);
 137 Logbuf infobuf(LMT_INFO);
 138 Logbuf verbosebuf(LMT_VERBOSE);
 139 std::ostream errorstream(&errorbuf);
 140 std::ostream actionstream(&actionbuf);
 141 std::ostream infostream(&infobuf);
 142 std::ostream verbosestream(&verbosebuf);
 143
 144