/*
 * $Id$
 */

/*
 * Harbour Project source code:
 * Uppercase/lowercase string functions
 *
 * Copyright 1999 Antonio Linares <alinares@fivetech.com>
 * www - http://www.harbour-project.org
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this software; see the file COPYING.  If not, write to
 * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 * Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
 *
 * As a special exception, the Harbour Project gives permission for
 * additional uses of the text contained in its release of Harbour.
 *
 * The exception is that, if you link the Harbour libraries with other
 * files to produce an executable, this does not by itself cause the
 * resulting executable to be covered by the GNU General Public License.
 * Your use of that executable is in no way restricted on account of
 * linking the Harbour library code into it.
 *
 * This exception does not however invalidate any other reasons why
 * the executable file might be covered by the GNU General Public License.
 *
 * This exception applies only to the code released by the Harbour
 * Project under the name Harbour.  If you copy code from other
 * Harbour Project or Free Software Foundation releases into a copy of
 * Harbour, as the General Public License permits, the exception does
 * not apply to the code that you add in this way.  To avoid misleading
 * anyone as to the status of such modified files, you must delete
 * this exception notice from them.
 *
 * If you write modifications of your own for Harbour, it is your choice
 * whether to permit this exception to apply to your modifications.
 * If you do not wish that, delete this exception notice.
 *
 */

#include <ctype.h>

#include "hbapi.h"
#include "hbapiitm.h"
#include "hbapierr.h"
#include "hbapicdp.h"

extern PHB_CODEPAGE s_cdpage;

/* converts szText to lower case. Does not create a new string! */
char * hb_strLower( char * szText, ULONG ulLen )
{
   ULONG i;

   HB_TRACE(HB_TR_DEBUG, ("hb_strLower(%s, %lu)", szText, ulLen));

   if( s_cdpage->nChars )
      for( i = 0; i < ulLen; i++ )
         szText[ i ] = (char) s_cdpage->s_lower[szText[i]&255];
   else
      for( i = 0; i < ulLen; i++ )
         szText[ i ] = tolower( (unsigned char) szText[ i ] );

   return szText;
}

/* converts szText to upper case. Does not create a new string! */
char * hb_strUpper( char * szText, ULONG ulLen )
{
   ULONG i;

   HB_TRACE(HB_TR_DEBUG, ("hb_strUpper(%s, %lu)", szText, ulLen));

   if( s_cdpage->nChars )
      for( i = 0; i < ulLen; i++ )
         szText[ i ] = (char) s_cdpage->s_upper[szText[i]&255];
   else
      for( i = 0; i < ulLen; i++ )
         szText[ i ] = toupper( (unsigned char) szText[ i ] );

   return szText;
}

/* This function copies and converts szText to upper case.
 */
char * hb_strncpyUpper( char * pDest, const char * pSource, ULONG ulLen )
{
   HB_TRACE(HB_TR_DEBUG, ("hb_strncpyUpper(%p, %s, %lu)", pDest, pSource, ulLen));

   pDest[ ulLen ] ='\0';
   while( ulLen-- )
   {
      /* some compilers impliment toupper as a macro, and this has side effects! */
      /* *pDest++ = toupper( *pSource++ ); */
      pDest[ ulLen ] = toupper( (unsigned char) pSource[ ulLen ] );
   }

   return pDest;
}

/* This function copies and converts szText to upper case AND Trims it
 */
char * hb_strncpyUpperTrim( char * pDest, const char * pSource, ULONG ulLen )
{
   HB_TRACE(HB_TR_DEBUG, ("hb_strncpyUpper(%p, %s, %lu)", pDest, pSource, ulLen));

   pDest[ ulLen ] ='\0';

   while( ulLen-- && pSource[ ulLen ] == ' ')
      pDest[ ulLen ] = '\0';

   ulLen++;
   while( ulLen-- )
   {
      /* some compilers impliment toupper as a macro, and this has side effects! */
      /* *pDest++ = toupper( *pSource++ ); */
      pDest[ ulLen ] = toupper( (unsigned char) pSource[ ulLen ] );
   }

   return pDest;
}


/* converts string to lower case */
HB_FUNC( LOWER )
{
   PHB_ITEM pText = hb_param( 1, HB_IT_STRING );

   if( pText )
   {
      char * pszBuffer = hb_itemGetC( pText );
      ULONG ulLen = hb_itemGetCLen( pText );

      hb_retclen_buffer( hb_strLower( pszBuffer, ulLen ), ulLen );
   }
   else
      hb_errRT_BASE_SubstR( EG_ARG, 1103, NULL, "LOWER", 1, hb_paramError( 1 ) );
}

/* converts string to upper case */
HB_FUNC( UPPER )
{
   PHB_ITEM pText = hb_param( 1, HB_IT_STRING );

   if( pText )
   {
      char * pszBuffer = hb_itemGetC( pText );
      ULONG ulLen = hb_itemGetCLen( pText );

      hb_retclen_buffer( hb_strUpper( pszBuffer, ulLen ), ulLen );
   }
   else
      hb_errRT_BASE_SubstR( EG_ARG, 1102, NULL, "UPPER", 1, hb_paramError( 1 ) );
}