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/* GNU Ocrad - Optical Character Recognition program
Copyright (C) 2003, 2004, 2005, 2006 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
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, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <algorithm>
#include <cstdio>
#include <cstdlib>
#include "common.h"
namespace {
const int charsets = 3;
const Charset::Value charset_value[charsets] =
{ Charset::ascii, Charset::iso_8859_9, Charset::iso_8859_15 };
const char * const charset_name[charsets] =
{ "ascii", "iso-8859-9", "iso-8859-15" };
struct F_entry
{
const char * name;
Filter::Type type;
};
const F_entry F_table[] =
{
{ "none", Filter::none },
{ "letters", Filter::letters },
{ "letters_only", Filter::letters_only },
{ "numbers", Filter::numbers },
{ "numbers_only", Filter::numbers_only },
{ 0, Filter::none }
};
struct T_entry
{
const char * name;
Transformation::Type type;
};
const T_entry T_table[] =
{
{ "none", Transformation::none },
{ "rotate90", Transformation::rotate90 },
{ "rotate180", Transformation::rotate180 },
{ "rotate270", Transformation::rotate270 },
{ "mirror_lr", Transformation::mirror_lr },
{ "mirror_tb", Transformation::mirror_tb },
{ "mirror_d1", Transformation::mirror_d1 },
{ "mirror_d2", Transformation::mirror_d2 },
{ 0, Transformation::none }
};
} // end namespace
bool Ocrad::similar( int a, int b, int percent_dif, int abs_dif ) throw()
{
int difference = std::abs( a - b );
if( percent_dif > 0 && difference <= abs_dif ) return true;
int max_abs = std::max( std::abs(a), std::abs(b) );
return ( difference * 100 <= max_abs * percent_dif );
}
bool Charset::enable( const char * name ) throw()
{
for( int i = 0; i < charsets; ++i )
if( std::strcmp( name, charset_name[i] ) == 0 )
{ _charset |= charset_value[i]; return true; }
return false;
}
bool Charset::enabled( Value cset ) const throw()
{
if( !_charset ) return cset == iso_8859_15; // default charset
return _charset & cset;
}
bool Charset::only( Value cset ) const throw()
{
if( !_charset ) return cset == iso_8859_15; // default charset
return _charset == cset;
}
void Charset::show_error( const char * program_name, const char * arg ) const throw()
{
if( arg && std::strcmp( arg, "help" ) )
std::fprintf( stderr,"%s: bad charset `%s'\n", program_name, arg );
std::fputs( "Valid charset names are:", stderr );
for( int i = 0; i < charsets; ++i )
std::fprintf( stderr, " %s", charset_name[i] );
std::fputs( "\n", stderr );
}
bool Filter::set( const char * name ) throw()
{
for( int i = 0; F_table[i].name != 0; ++i )
if( std::strcmp( name, F_table[i].name ) == 0 )
{ _type = F_table[i].type; return true; }
return false;
}
void Filter::show_error( const char * program_name, const char * arg ) const throw()
{
if( arg && std::strcmp( arg, "help" ) )
std::fprintf( stderr,"%s: bad filter `%s'\n", program_name, arg );
std::fputs( "Valid filter names are:", stderr );
for( int i = 0; F_table[i].name != 0; ++i )
std::fprintf( stderr, " %s", F_table[i].name );
std::fputs( "\n", stderr );
}
bool Transformation::set( const char * name ) throw()
{
for( int i = 0; T_table[i].name != 0; ++i )
if( std::strcmp( name, T_table[i].name ) == 0 )
{ _type = T_table[i].type; return true; }
return false;
}
void Transformation::show_error( const char * program_name, const char * arg ) const throw()
{
if( arg && std::strcmp( arg, "help" ) )
std::fprintf( stderr,"%s: bad bitmap trasformation `%s'\n", program_name, arg );
std::fputs( "Valid transformation names are:", stderr );
for( int i = 0; T_table[i].name != 0; ++i )
std::fprintf( stderr, " %s", T_table[i].name );
std::fputs( "\nRotations are made counter-clockwise.\n", stderr );
}
bool Control::set_format( const char * name ) throw()
{
if( std::strcmp( name, "byte" ) == 0 ) { format = byte; return true; }
if( std::strcmp( name, "utf8" ) == 0 ) { format = utf8; return true; }
return false;
}
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