1 /*

     2 * Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).

     3 * All rights reserved.

     4 * This component and the accompanying materials are made available

     5 * under the terms of the License "Eclipse Public License v1.0"

     6 * which accompanies this distribution, and is available

     7 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

     8 *

     9 * Initial Contributors:

    10 * Nokia Corporation - initial contribution.

    11 *

    12 * Contributors:

    13 *

    14 * Description: 

    15 * Definitions supporting character set mapping functionality.

    16 * Supported conversion is currently only between one of a set of

    17 * supported 8-bit character sets and Unicode.

    18 * Author:  Pute, January 1997.

    19 *

    20 */

    21 

    22 

    23 #ifndef __CTABLE_H__

    24 #define __CTABLE_H__

    25 #include <stdlib.h>

    26 #include "wide.h"

    27 

    28 #if defined(__VC32__)

    29 #pragma warning( disable : 4200 ) // nonstandard extension used : zero-sized array in struct/union

    30 #endif

    31 

    32 //

    33 // Structures that can be easily initialised from an initialiser list.

    34 // These are then used by the mapping classes defined underneath.

    35 // An alternative mode of operation would be to initialise the

    36 // classes from filed data, which would remove the need for the

    37 // structures.

    38 //

    39 

    40 

    41 struct S_mapping_range

    42     {

    43     int first;

    44     int last;

    45     UTF16 mappings[32];

    46     };

    47 

    48 // Intended to hold a set of contiguous mappings from characters in

    49 // the range defined by first and last.

    50 

    51 

    52 

    53 

    54 

    55 class Range

    56     {

    57 private:

    58     int i_first;

    59     int i_last;

    60     // these define the range.  Arguably this could be a template class,

    61     // but the STL needs to be explored for this stuff.

    62 

    63 public:

    64 

    65     Range ();

    66     Range ( int afirst, int alast );

    67     int count() const;                       // how many entries?

    68     int part_of( int avalue ) const;         // is avalue part of the range?

    69     int first() const;                       // return the first value

    70     void define ( int afirst, int alast );   // define new range.

    71 

    72     };

    73 

    74 

    75 

    76 class Mapping_range

    77     {

    78 private:

    79     Range range;

    80     UTF16 *mappings;

    81 

    82 public:

    83     Mapping_range();

    84     Mapping_range( S_mapping_range *data );

    85 

    86     int map( unsigned char an8_bit_character, UTF16 &aUnicode_character ) const;

    87     //

    88     // If the 8-bit character is within range, the Unicode character is set

    89     // to its mapping, otherwise the Unicode character is unmodified.

    90     // The return value is true or false to indicate whether or not a

    91     // mapping took place.

    92 

    93     };

    94 

    95 

    96 // Need to supply an escape mechanism for Unicode characters enbedded in CP1252 strings

    97 const unsigned char UnicodeEscape = 0x81;	// indicates embedded UTF8 encoding of Unicode character

    98 

    99 

   100 #endif // CTABLE_H not defined

   101 // end of CTABLE.H

   102