g_car_base.h

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#pragma once

#ifndef size_t 
    typedef unsigned int size_t;
#endif

namespace g
{
namespace car
{

template < class T > bool is_between ( T aChar , T aStart , T aStop );

template < class T > bool is_char_a_digit  ( T aChar ) { return is_between <T> ( aChar , '0' , '9' ); }

template < class T >    bool is_char_ucase    ( T aChar ) { return is_between <T> ( aChar , 'A' , 'Z' ); }

template < class T > bool is_char_lcase    ( T aChar ) { return is_between <T> ( aChar , 'a' , 'z' ); }

template < class T > bool is_char_a_letter ( T aChar ) { return is_char_lcase ( aChar ) || is_char_ucase ( aChar ); };

template < class T > T  u_case ( T aChar ) { return ( is_char_lcase ( aChar ) )? ( aChar - 'a' + 'A' ) : aChar; }

template < class T >    T  l_case ( T aChar ) { return ( is_char_ucase ( aChar ) )? ( aChar - 'A' + 'a' ) : aChar; }

//template < class T > bool str_equal ( T  , T , bool case_sens = true );

template <> inline bool is_between ( char aChar , char aStart , char aStop )
{
    return ( aChar >= aStart && aChar <= aStop );
}

template <> inline bool is_between ( wchar_t aChar , wchar_t aStart , wchar_t aStop )
{
    return is_between <char>( 
        (char)(0xff & aChar) , (char)(0xff & aStart) , (char)(0xff & aStop) );
}

template < class T > bool chr_equal ( T aC1 , T aC2 , bool aIsCaseSensitive )
{
    return ( aIsCaseSensitive ) ?
        ( aC1 == aC2 ) : ( u_case ( aC1 ) == u_case ( aC2 ) );
}

template < class T> GUint64_t get_chr_ordinal_code ( T aChar )
{
    if ( is_char_a_digit ( aChar ) )
    {
        return (GUint64_t)( aChar - (T)'0' );
    }
    else if ( is_char_lcase ( aChar ) )
    {
        return (GUint64_t)( aChar - (T)'a' ) | (GUint64_t)0xf0;
    }
    else if ( is_char_ucase ( aChar ) )
    {
        return (GUint64_t)( aChar - (T)'A' ) | (GUint64_t)0xf00;
    }
    else 
    {
        return (GUint64_t)( aChar ) | (GUint64_t)0xf000;
    }
}

template < class T > int chr_compare ( T aC1 , T aC2 , bool aIsCaseSensitive )
{
    if ( !aIsCaseSensitive )
    {
        aC1 = l_case ( aC1 );
        aC2 = l_case ( aC2 );
    }

    GUint64_t ordinal_code_1 = get_chr_ordinal_code ( aC1 );
    GUint64_t ordinal_code_2 = get_chr_ordinal_code ( aC2 );

    if ( ordinal_code_1 < ordinal_code_2 )
    {
        return -1;
    }
    if ( ordinal_code_1 > ordinal_code_2 )
    {
        return +1;
    }
    else
    {
        return 0;
    }
}

}// namespace car
}// namespace g