LogFormat.h++

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/* ---------------------------------------------------------------------------
   commonc++ - A C++ Common Class Library
   Copyright (C) 2005-2014  Mark A Lindner

   This file is part of commonc++.

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with this library; if not, write to the Free
   Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
   ---------------------------------------------------------------------------
*/

#ifndef __ccxx_LogFormat_hxx
#define __ccxx_LogFormat_hxx

#include <commonc++/Common.h++>
#include <commonc++/Buffer.h++>
#include <commonc++/DateTimeFormat.h++>
#include <commonc++/String.h++>

#include <cstdio>
#include <cstdarg>

#ifdef CCXX_OS_POSIX
#include <unistd.h>
#include <sys/utsname.h>
#endif

#include <vector>

namespace ccxx {

enum LogLevel {
  LogDebug = 1 << 0,
  LogInfo = 1 << 1,
  LogWarning = 1 << 2,
  LogError = 1 << 3
};

class COMMONCPP_API LogFormat
{
 private:

  class TokenList; // fwd decl

  enum TokenCode { TOK_INVALID = -1, TOK_LITERAL = 0, TOK_TIME_LONG,
                   TOK_TIME_SHORT, TOK_DATE_LONG, TOK_DATE_SHORT, TOK_FILE,
                   TOK_LINE, TOK_MESSAGE, TOK_THREAD, TOK_PID, TOK_OSNAME,
                   TOK_ARCH, TOK_OSVER, TOK_USERNAME, TOK_HOST, TOK_LEVEL,
                   TOK_PERCENT, TOK_BOLD, TOK_UNDERLINE, TOK_INVERSE,
                   TOK_PLAIN, TOK_DEFAULT, TOK_BLACK, TOK_RED, TOK_GREEN,
                   TOK_YELLOW, TOK_BLUE, TOK_MAGENTA, TOK_CYAN, TOK_WHITE,
                   TOK_STYLESOFF, TOK_AUTOCOLOR, TOK_NEWLINE, TOK_APPNAME,
                   TOK_MAX };

  TokenCode lookupToken(char c);
  void clearTokens();

  struct Token
  {
    Token(TokenCode token = TOK_LITERAL, const char* text = NULL, int len = 0);
    ~Token();

    TokenCode _token;
    char* _text;
  };

  String _format;
  TokenList* _tokens;

 public:

  LogFormat(String format = "[%D %T] %F:%L %m");

  virtual ~LogFormat();

  void setFormat(const String& format);

  void format(CharBuffer& buffer, LogLevel level, const char* file,
              int line, const char* message, va_list args);

  void setShortDateFormat(const String& format);

  void setLongDateFormat(const String& format);

  void setShortTimeFormat(const String& format);

  void setLongTimeFormat(const String& format);

 private:

  static size_t _eolLen;

  DateTimeFormat _shortDateFormat;
  DateTimeFormat _longDateFormat;
  DateTimeFormat _shortTimeFormat;
  DateTimeFormat _longTimeFormat;

  CCXX_COPY_DECLS(LogFormat);
};

} // namespace ccxx

#endif // __ccxx_LogFormat_hxx