/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
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 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is 
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 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *
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 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
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#include "nsCaseConversionImp.h"
#include "ucdata.h"

#define UCDATAFILEPATH "./res/unicharutil"

#define CAST_PRUNICHAR_TO_ULONG(u) (unsigned long) (((u) & 0x0000FFFF))
#define CAST_ULONG_TO_PRUNICHAR(l) ((PRUnichar) (l))

PRBool nsCaseConversionImp::gInit      = PR_FALSE;

NS_IMPL_ISUPPORTS1(nsCaseConversionImp, nsICaseConversion)

void nsCaseConversionImp::Init()
{
  ucdata_load(UCDATAFILEPATH, UCDATA_CASE|UCDATA_CTYPE);
  gInit = PR_TRUE;
}
nsresult nsCaseConversionImp::ToUpper(
  PRUnichar aChar, PRUnichar* aReturn
)
{
  *aReturn = CAST_ULONG_TO_PRUNICHAR( 
               uctoupper( CAST_PRUNICHAR_TO_ULONG(aChar))
             );
  return NS_OK;
}

nsresult nsCaseConversionImp::ToLower(
  PRUnichar aChar, PRUnichar* aReturn
)
{
  *aReturn = CAST_ULONG_TO_PRUNICHAR( 
                uctolower( CAST_PRUNICHAR_TO_ULONG(aChar))
             );
  return NS_OK;
}

nsresult nsCaseConversionImp::ToTitle(
  PRUnichar aChar, PRUnichar* aReturn
)
{
  *aReturn = CAST_ULONG_TO_PRUNICHAR( 
                uctotitle( CAST_PRUNICHAR_TO_ULONG(aChar))
             );
  return NS_OK;
}

nsresult nsCaseConversionImp::ToUpper(
  const PRUnichar* anArray, PRUnichar* aReturn, PRUint32 aLen
)
{
  PRUint32 i;
  for(i=0;i<aLen;i++)
    aReturn[i] = CAST_ULONG_TO_PRUNICHAR( 
                   uctoupper( CAST_PRUNICHAR_TO_ULONG(anArray[i]))
                 );
  return NS_OK;
}

nsresult nsCaseConversionImp::ToLower(
  const PRUnichar* anArray, PRUnichar* aReturn, PRUint32 aLen
)
{
  PRUint32 i;
  for(i=0;i<aLen;i++)
    aReturn[i] = CAST_ULONG_TO_PRUNICHAR( 
                   uctolower( CAST_PRUNICHAR_TO_ULONG(anArray[i]))
                 );
  return NS_OK;
}

nsresult nsCaseConversionImp::ToTitle(
  const PRUnichar* anArray, PRUnichar* aReturn, PRUint32 aLen
)
{

  PRUint32 i;
  PRBool bLastIsChar = PR_FALSE; 
  for(i=0;i<aLen;i++)
  {
   
    if(bLastIsChar)
      aReturn[i] = CAST_ULONG_TO_PRUNICHAR( 
                     uctolower( CAST_PRUNICHAR_TO_ULONG(anArray[i]))
                   );
    else
      aReturn[i] = CAST_ULONG_TO_PRUNICHAR( 
                     uctotitle( CAST_PRUNICHAR_TO_ULONG(anArray[i]))
                   );

    bLastIsChar = ucisalpha(CAST_PRUNICHAR_TO_ULONG(anArray[i]));
  }
  return NS_OK;
}