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/*  GNU Ocrad - Optical Character Recognition program
    Copyright (C) 2003, 2004, 2005 Antonio Diaz Diaz.

    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 2 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
    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, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

namespace Ocrad
  void internal_error( const char * msg ) throw() __attribute__ ((noreturn));
  bool similar( int a, int b, int percent_dif, int abs_dif = 1 ) throw();

class Charset
  int _charset;

  enum Value { ascii = 1, iso_8859_9 = 2, iso_8859_15 = 4 };

  Charset() throw() : _charset( 0 ) {}
  bool enable( const char * name ) throw();
  bool enabled( Value cset ) const throw();
  bool only( Value cset ) const throw();
  void show_error( const char * program_name, const char * arg ) const throw();

class Transformation
  enum Type { none, rotate90, rotate180, rotate270,
              mirror_lr, mirror_tb, mirror_d1, mirror_d2 };
  Type _type;

  Transformation() throw() : _type( none ) {}
  bool set( const char * name ) throw();
  Type type() const throw() { return _type; }
  void show_error( const char * program_name, const char * arg ) const throw();

struct Control
  enum Format { byte, utf8 };

  Charset charset;
  Format format;
  FILE *outfile, *exportfile;
  int debug_level;
  char filetype;
  bool verbose;

  Control() throw()
    : format( byte ), outfile( stdout ), exportfile( 0 ),
      debug_level( 0 ), filetype( 0 ), verbose( false ) {}

  bool set_format( const char * name ) throw();

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