/*

 * lftp - file transfer program

 *

 * Copyright (c) 1996-2016 by Alexander V. Lukyanov (lav@yars.free.net)

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation; either version 3 of the License, or

 * (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

#ifndef LOG_H

#define LOG_H

#include <unistd.h>

#include <stdlib.h>

#include <stdarg.h>

#include "Ref.h"

#include "ResMgr.h"

class Log : public ResClient

{

   const char *name;

   int output;

   bool need_close_output;

   bool tty;

   bool show_pid;

   bool show_time;

   bool show_context;

   bool at_line_start;

   typedef void (*tty_cb_t)();

   tty_cb_t tty_cb;

   void CloseOutput()

      {

	 if(need_close_output)

	    close(output);

	 output=-1;

	 need_close_output=false;

      }

   bool enabled;

   int level;

   xstring buf;

protected:

   void SetOutput(int o,bool need_close);

public:

   static Ref<Log> global;

   bool WillOutput(int l);

   void DoWrite(const char *str,int len);

   void DoWrite(const xstring &str) { DoWrite(str,str.length()); }

   void Write(int l,const char *str,int len);

   void Write(int l,const char *str) { Write(l,str,xstrlen(str)); }

   void Write(int l,const xstring &str) { Write(l,str,str.length()); }

   void Format(int l,const char *fmt,...) PRINTF_LIKE(3,4);

   void vFormat(int l,const char *fmt,va_list v);

   void SetCB(tty_cb_t cb) { tty_cb=cb; }

   bool IsTTY() { return tty; }

   Log(const char *name);

   ~Log();

   static void Cleanup();

   const char *ResPrefix() const { return "log"; }

   const char *ResClosure() const { return name; }

   void Reconfig(const char *);

};

#define debug(a) do { if(Log::global) Log::global->Format a; } while(0)

#endif // LOG_H