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 #include "porting.h"
  30 #include "config.h"
  31
  32 std::list<ILogOutput*> log_outputs[LMT_NUM_VALUES];
  33 std::map<threadid_t, std::string> log_threadnames;
  34 JMutex                            log_threadnamemutex;
  35
  36 void log_add_output(ILogOutput *out, enum LogMessageLevel lev)
  37 {
  38         log_outputs[lev].push_back(out);
  39 }
  40
  41 void log_add_output_maxlev(ILogOutput *out, enum LogMessageLevel lev)
  42 {
  43         for(int i=0; i<=lev; i++)
  44                 log_outputs[i].push_back(out);
  45 }
  46
  47 void log_add_output_all_levs(ILogOutput *out)
  48 {
  49         for(int i=0; i<LMT_NUM_VALUES; i++)
  50                 log_outputs[i].push_back(out);
  51 }
  52
  53 void log_remove_output(ILogOutput *out)
  54 {
  55         for(int i=0; i<LMT_NUM_VALUES; i++){
  56                 std::list<ILogOutput*>::iterator it =
  57                                 std::find(log_outputs[i].begin(), log_outputs[i].end(), out);
  58                 if(it != log_outputs[i].end())
  59                         log_outputs[i].erase(it);
  60         }
  61 }
  62
  63 void log_register_thread(const std::string &name)
  64 {
  65         threadid_t id = get_current_thread_id();
  66         log_threadnamemutex.Lock();
  67         log_threadnames[id] = name;
  68         log_threadnamemutex.Unlock();
  69 }
  70
  71 void log_deregister_thread()
  72 {
  73         threadid_t id = get_current_thread_id();
  74         log_threadnamemutex.Lock();
  75         log_threadnames.erase(id);
  76         log_threadnamemutex.Unlock();
  77 }
  78
  79 static std::string get_lev_string(enum LogMessageLevel lev)
  80 {
  81         switch(lev){
  82         case LMT_ERROR:
  83                 return "ERROR";
  84         case LMT_ACTION:
  85                 return "ACTION";
  86         case LMT_INFO:
  87                 return "INFO";
  88         case LMT_VERBOSE:
  89                 return "VERBOSE";
  90         case LMT_NUM_VALUES:
  91                 break;
  92         }
  93         return "(unknown level)";
  94 }
  95
  96 void log_printline(enum LogMessageLevel lev, const std::string &text)
  97 {
  98         log_threadnamemutex.Lock();
  99         std::string threadname = "(unknown thread)";
 100         std::map<threadid_t, std::string>::const_iterator i;
 101         i = log_threadnames.find(get_current_thread_id());
 102         if(i != log_threadnames.end())
 103                 threadname = i->second;
 104         std::string levelname = get_lev_string(lev);
 105         std::ostringstream os(std::ios_base::binary);
 106         os<<getTimestamp()<<": "<<levelname<<"["<<threadname<<"]: "<<text;
 107         for(std::list<ILogOutput*>::iterator i = log_outputs[lev].begin();
 108                         i != log_outputs[lev].end(); i++){
 109                 ILogOutput *out = *i;
 110                 out->printLog(os.str());
 111                 out->printLog(os.str(), lev);
 112                 out->printLog(lev, text);
 113         }
 114         log_threadnamemutex.Unlock();
 115 }
 116
 117 class Logbuf : public std::streambuf
 118 {
 119 public:
 120         Logbuf(enum LogMessageLevel lev):
 121                 m_lev(lev)
 122         {
 123         }
 124
 125         ~Logbuf()
 126         {
 127         }
 128
 129         int overflow(int c)
 130         {
 131                 bufchar(c);
 132                 return c;
 133         }
 134         std::streamsize xsputn(const char *s, std::streamsize n)
 135         {
 136                 for(int i=0; i<n; i++)
 137                         bufchar(s[i]);
 138                 return n;
 139         }
 140
 141         void printbuf()
 142         {
 143                 log_printline(m_lev, m_buf);
 144 #ifdef __ANDROID__
 145                 __android_log_print(ANDROID_LOG_ERROR, PROJECT_NAME, "%s", m_buf.c_str());
 146 #endif
 147         }
 148
 149         void bufchar(char c)
 150         {
 151                 if(c == '\n' || c == '\r'){
 152                         if(m_buf != "")
 153                                 printbuf();
 154                         m_buf = "";
 155                         return;
 156                 }
 157                 m_buf += c;
 158         }
 159
 160 private:
 161         enum LogMessageLevel m_lev;
 162         std::string m_buf;
 163 };
 164
 165 Logbuf errorbuf(LMT_ERROR);
 166 Logbuf actionbuf(LMT_ACTION);
 167 Logbuf infobuf(LMT_INFO);
 168 Logbuf verbosebuf(LMT_VERBOSE);
 169 std::ostream errorstream(&errorbuf);
 170 std::ostream actionstream(&actionbuf);
 171 std::ostream infostream(&infobuf);
 172 std::ostream verbosestream(&verbosebuf);
 173
 174 bool log_trace_level_enabled = false;
 175