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#include "nsUCS2LEToUnicode.h"

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

static const PRUint16 g_UCS2LEMappingTable[] = {
  0x0001, 0x0004, 0x0005, 0x0008, 0x0000, 0x0000, 0xFFFF, 0x0000
};

static const PRInt16 g_UCS2LEShiftTable[] =  {
  0, u2BytesSwapCharset, 
  ShiftCell(0,       0, 0, 0, 0, 0, 0, 0), 
};

//----------------------------------------------------------------------
// Class nsUCS2LEToUnicode [implementation]

nsUCS2LEToUnicode::nsUCS2LEToUnicode() 
: nsTableDecoderSupport((uShiftTable*) &g_UCS2LEShiftTable, 
                        (uMappingTable*) &g_UCS2LEMappingTable)
{
}

nsresult nsUCS2LEToUnicode::CreateInstance(nsISupports ** aResult) 
{
  *aResult = new nsUCS2LEToUnicode();
  return (*aResult == NULL)? NS_ERROR_OUT_OF_MEMORY : NS_OK;
}

//----------------------------------------------------------------------
// Subclassing of nsTableDecoderSupport class [implementation]

NS_IMETHODIMP nsUCS2LEToUnicode::GetMaxLength(const char * aSrc, 
                                            PRInt32 aSrcLength, 
                                            PRInt32 * aDestLength)
{
  if(0 == (aSrcLength % 2)) 
  {
    *aDestLength = aSrcLength / 2;
    return NS_OK_UENC_EXACTLENGTH;
  } else {
    *aDestLength = (aSrcLength  + 1) / 2;
    return NS_OK;
  }
}
