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#include "nsCP949ToUnicode.h"
#include "nsUCvKODll.h"
#include "nsUCConstructors.h"

//----------------------------------------------------------------------
// Global functions and data [declaration]

static const PRUint16 g_ASCIIShiftTable[] =  {
  0, u1ByteCharset,
  ShiftCell(0,0,0,0,0,0,0,0)
};

// This is necessary to decode 8byte sequence representation of Hangul
// syllables. This representation is uniq to EUC-KR and is not used
// in CP949. However, this conveter is for both EUC-KR and CP949
// so that this shift table is put here. See bug 131388. 
static const PRUint16 g_DecomposedHangulShiftTable[] =  {
  0, uDecomposedHangulCharset,  
  ShiftCell(0,   0, 0, 0, 0, 0, 0, 0),
};

static const PRUint16 g_EUCKRShiftTable[] =  {
  0, u2BytesGRCharset,  
  ShiftCell(0,  0, 0, 0, 0, 0, 0, 0)
};

static const PRUint16 g_CP949HighShiftTable[] =  {
  0, u2BytesGR128Charset,  
  ShiftCell(0,  0, 0, 0, 0, 0, 0, 0)
};

static const PRUint16 g_CP949LowShiftTable[] =  {
  0, u2BytesCharset,  
  ShiftCell(0,  0, 0, 0, 0, 0, 0, 0)
};

// CP949(non-EUC-KR portion) to Unicode
static const PRUint16 g_utCP949NoKSCHangulMapping[] = {
#include "u20cp949hangul.ut"
};

static const uRange g_CP949Ranges[] = {
  { 0x00, 0x7E },
  { 0xA4, 0xA4 },   // 8byte seq. for Hangul syllables not available
                    // in pre-composed form in KS X 1001
  { 0xA1, 0xFE },
  { 0xA1, 0xC6 },   // CP949 extension B. ends at 0xC6.
  { 0x80, 0xA0 }
};


static const PRUint16 *g_CP949ShiftTableSet [] = {
  g_ASCIIShiftTable,
  g_DecomposedHangulShiftTable,
  g_EUCKRShiftTable,
  g_CP949HighShiftTable,
  g_CP949LowShiftTable
};

static const PRUint16 *g_CP949MappingTableSet [] ={
  g_ucvko_AsciiMapping,
  g_HangulNullMapping,
  g_utKSC5601Mapping,
  g_utCP949NoKSCHangulMapping,
  g_utCP949NoKSCHangulMapping
//g_CP949HighMapping,
//g_CP949LowMapping
};


NS_METHOD
nsCP949ToUnicodeConstructor(nsISupports *aOuter, REFNSIID aIID,
                            void **aResult)
{
  return CreateMultiTableDecoder(sizeof(g_CP949Ranges) / sizeof(g_CP949Ranges[0]),
                                 (const uRange*) &g_CP949Ranges,
                                 (uShiftTable**) &g_CP949ShiftTableSet, 
                                 (uMappingTable**) &g_CP949MappingTableSet, 1,
                                 aOuter, aIID, aResult);
}