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harbour-core/harbour/source/vm/itemapi.c

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/*
* $Id$
*/
/*
* Harbour Project source code:
* The Item API
*
* 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.
*
*/
/*
* The following parts are Copyright of the individual authors.
* www - http://www.harbour-project.org
*
* Copyright 1999-2001 Viktor Szakats <viktor.szakats@syenar.hu>
* hb_itemPCount()
* hb_itemParamPtr()
* hb_itemReturnPtr()
* hb_itemPutDL()
* hb_itemPutNI()
* hb_itemGetDL()
* hb_itemGetNI()
* hb_itemGetCPtr()
* hb_itemGetCLen()
* hb_itemGetNLen()
* hb_itemPutCConst()
* hb_itemPutNLen()
* hb_itemPutNDLen()
* hb_itemPutNILen()
* hb_itemPutNLLen()
* hb_itemPutD()
* hb_itemSetCMemo()
*
* Copyright 1999 Eddie Runia <eddie@runia.com>
* hb_itemStrCmp()
*
* Copyright 1999 David G. Holm <dholm@jsd-llc.com>
* hb_itemStr(), hb_itemString(), and hb_itemValToStr().
*
* See doc/license.txt for licensing terms.
*
*/
#include <math.h> /* For log() */
#include "hbapi.h"
#include "hbstack.h"
#include "hbapiitm.h"
#include "hbapierr.h"
#include "hbdate.h"
#include "hbset.h"
/* DJGPP can sprintf a float that is almost 320 digits long */
#define HB_MAX_DOUBLE_LENGTH 320
PHB_ITEM hb_itemNew( PHB_ITEM pNull )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemNew(%p)", pNull));
return hb_gcGripGet( pNull );
}
PHB_ITEM hb_itemParam( USHORT uiParam )
{
PHB_ITEM pNew;
PHB_ITEM pItem;
HB_TRACE(HB_TR_DEBUG, ("hb_itemParam(%hu)", uiParam));
pNew = hb_itemNew( NULL );
pItem = hb_param( uiParam, HB_IT_ANY );
if( pItem )
hb_itemCopy( pNew, pItem );
return pNew;
}
/* Internal Item API. Use this with care. */
PHB_ITEM hb_itemParamPtr( USHORT uiParam, int iMask )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemParamPtr(%hu, %d)", uiParam, iMask));
return hb_param( ( int ) uiParam, iMask );
}
USHORT hb_itemPCount( void )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemPCount()"));
return ( USHORT ) hb_pcount();
}
BOOL hb_itemRelease( PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemRelease(%p)", pItem));
if( pItem )
{
hb_gcGripDrop( pItem );
return TRUE;
}
else
return FALSE;
}
PHB_ITEM hb_itemArrayNew( ULONG ulLen )
{
PHB_ITEM pItem;
HB_TRACE(HB_TR_DEBUG, ("hb_itemArrayNew(%lu)", ulLen));
pItem = hb_itemNew( NULL );
hb_arrayNew( pItem, ulLen );
return pItem;
}
PHB_ITEM hb_itemArrayGet( PHB_ITEM pArray, ULONG ulIndex )
{
PHB_ITEM pItem;
HB_TRACE(HB_TR_DEBUG, ("hb_itemArrayGet(%p, %lu)", pArray, ulIndex));
pItem = hb_itemNew( NULL );
if( pArray )
hb_arrayGet( pArray, ulIndex, pItem );
return pItem;
}
PHB_ITEM hb_itemArrayPut( PHB_ITEM pArray, ULONG ulIndex, PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemArrayPut(%p, %lu, %p)", pArray, ulIndex, pItem));
if( pArray )
hb_arraySet( pArray, ulIndex, pItem );
return pArray;
}
PHB_ITEM hb_itemPutC( PHB_ITEM pItem, char * szText )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemPutC(%p, %s)", pItem, szText));
if( pItem )
hb_itemClear( pItem );
else
pItem = hb_itemNew( NULL );
pItem->type = HB_IT_STRING;
if( szText == NULL )
{
pItem->item.asString.length = 0;
pItem->item.asString.value = "";
pItem->item.asString.bPcode = TRUE;
}
else
{
pItem->item.asString.length = strlen( szText );
pItem->item.asString.value = ( char * ) hb_xgrab( pItem->item.asString.length + 1 );
pItem->item.asString.bPcode = FALSE;
pItem->item.asString.puiHolders = ( USHORT * ) hb_xgrab( sizeof( USHORT ) );
* ( pItem->item.asString.puiHolders ) = 1;
strcpy( pItem->item.asString.value, szText );
}
return pItem;
}
PHB_ITEM hb_itemPutCConst( PHB_ITEM pItem, char * szText )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemPutCConst(%p, %s)", pItem, szText));
if( pItem )
hb_itemClear( pItem );
else
pItem = hb_itemNew( NULL );
pItem->type = HB_IT_STRING;
pItem->item.asString.bPcode = TRUE;
if( szText == NULL )
{
pItem->item.asString.length = 0;
pItem->item.asString.value = "";
}
else
{
pItem->item.asString.length = strlen( szText );
pItem->item.asString.value = szText;
}
return pItem;
}
PHB_ITEM hb_itemPutCL( PHB_ITEM pItem, char * szText, ULONG ulLen )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemPutCL(%p, %s, %lu)", pItem, szText, ulLen));
if( pItem )
hb_itemClear( pItem );
else
pItem = hb_itemNew( NULL );
/* NOTE: CA-Clipper seems to be buggy here, it will return ulLen bytes of
trash if the szText buffer is NULL, at least with hb_retclen().
[vszakats] */
pItem->type = HB_IT_STRING;
if( szText == NULL )
{
pItem->item.asString.length = 0;
pItem->item.asString.value = "";
pItem->item.asString.bPcode = TRUE;
}
else
{
pItem->item.asString.length = ulLen;
pItem->item.asString.value = ( char * ) hb_xgrab( ulLen + 1 );
hb_xmemcpy( pItem->item.asString.value, szText, ulLen );
pItem->item.asString.value[ ulLen ] = '\0';
pItem->item.asString.bPcode = FALSE;
pItem->item.asString.puiHolders = ( USHORT * ) hb_xgrab( sizeof( USHORT ) );
* ( pItem->item.asString.puiHolders ) = 1;
}
return pItem;
}
PHB_ITEM hb_itemPutCPtr( PHB_ITEM pItem, char * szText, ULONG ulLen )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemPutCPtr(%p, %s, %lu)", pItem, szText, ulLen));
if( pItem )
hb_itemClear( pItem );
else
pItem = hb_itemNew( NULL );
pItem->type = HB_IT_STRING;
pItem->item.asString.length = ulLen;
pItem->item.asString.value = szText;
pItem->item.asString.value[ ulLen ] = '\0';
pItem->item.asString.bPcode = FALSE;
pItem->item.asString.puiHolders = ( USHORT * ) hb_xgrab( sizeof( USHORT ) );
* ( pItem->item.asString.puiHolders ) = 1;
return pItem;
}
void hb_itemSetCMemo( PHB_ITEM pItem )
{
if( pItem && HB_IS_STRING( pItem ) )
pItem->type |= HB_IT_MEMOFLAG;
}
/* NOTE: The caller should free the pointer if it's not NULL. [vszakats] */
char * hb_itemGetC( PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemGetC(%p)", pItem));
if( pItem && HB_IS_STRING( pItem ) )
{
char * szResult = ( char * ) hb_xgrab( pItem->item.asString.length + 1 );
hb_xmemcpy( szResult, pItem->item.asString.value, pItem->item.asString.length );
szResult[ pItem->item.asString.length ] = '\0';
return szResult;
}
else
return NULL;
}
/* NOTE: Caller should not modify the buffer returned by this function.
[vszakats] */
char * hb_itemGetCPtr( PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemGetCPtr(%p)", pItem));
if( pItem && HB_IS_STRING( pItem ) )
return pItem->item.asString.value;
else
return "";
}
ULONG hb_itemGetCLen( PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemGetCLen(%p)", pItem));
if( pItem && HB_IS_STRING( pItem ) )
return pItem->item.asString.length;
else
return 0;
}
ULONG hb_itemCopyC( PHB_ITEM pItem, char * szBuffer, ULONG ulLen )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemCopyC(%p, %s, %lu)", pItem, szBuffer, ulLen));
if( pItem && HB_IS_STRING( pItem ) )
{
if( ulLen == 0 )
ulLen = pItem->item.asString.length;
hb_xmemcpy( szBuffer, pItem->item.asString.value, ulLen );
return ulLen;
}
else
return 0;
}
BOOL hb_itemFreeC( char * szText )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemFreeC(%s)", szText));
if( szText )
{
hb_xfree( szText );
return TRUE;
}
else
return FALSE;
}
/* NOTE: Clipper is buggy and will not append a trailing zero, although
the NG says that it will. Check your buffers, since what may have
worked with Clipper could overrun the buffer with Harbour.
The correct buffer size is 9 bytes: char szDate[ 9 ]
[vszakats] */
char * hb_itemGetDS( PHB_ITEM pItem, char * szDate )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemGetDS(%p, %s)", szDate));
if( pItem && HB_IS_DATE( pItem ) )
return hb_dateDecStr( szDate, pItem->item.asDate.value );
else
return hb_dateDecStr( szDate, 0 );
}
long hb_itemGetDL( PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemGetDL(%p)", pItem));
if( pItem && HB_IS_DATE( pItem ) )
return pItem->item.asDate.value;
else
return 0;
}
BOOL hb_itemGetL( PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemGetL(%p)", pItem));
if( pItem )
{
switch( pItem->type )
{
case HB_IT_LOGICAL:
return pItem->item.asLogical.value;
case HB_IT_INTEGER:
return pItem->item.asInteger.value != 0;
case HB_IT_LONG:
return pItem->item.asLong.value != 0;
case HB_IT_DOUBLE:
return pItem->item.asDouble.value != 0.0;
}
}
return FALSE;
}
double hb_itemGetND( PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemGetND(%p)", pItem));
if( pItem )
{
switch( pItem->type )
{
case HB_IT_DOUBLE:
return pItem->item.asDouble.value;
case HB_IT_INTEGER:
return ( double ) pItem->item.asInteger.value;
case HB_IT_LONG:
return ( double ) pItem->item.asLong.value;
}
}
return 0;
}
int hb_itemGetNI( PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemGetNI(%p)", pItem));
if( pItem )
{
switch( pItem->type )
{
case HB_IT_INTEGER:
return pItem->item.asInteger.value;
case HB_IT_LONG:
return ( int ) pItem->item.asLong.value;
case HB_IT_DOUBLE:
return ( int ) pItem->item.asDouble.value;
}
}
return 0;
}
long hb_itemGetNL( PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemGetNL(%p)", pItem));
if( pItem )
{
switch( pItem->type )
{
case HB_IT_LONG:
return pItem->item.asLong.value;
case HB_IT_INTEGER:
return ( long ) pItem->item.asInteger.value;
case HB_IT_DOUBLE:
return ( long ) pItem->item.asDouble.value;
case HB_IT_DATE:
return pItem->item.asDate.value;
}
}
return 0;
}
void * hb_itemGetPtr( PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemGetPtr(%p)", pItem));
if( pItem )
return pItem->item.asPointer.value;
else
return NULL;
}
PHB_ITEM hb_itemReturn( PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemReturn(%p)", pItem));
if( pItem )
hb_itemCopy( &hb_stack.Return, pItem );
return pItem;
}
/* Internal Item API. Use this with care. */
PHB_ITEM hb_itemReturnPtr( void )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemReturnPtr()"));
return &hb_stack.Return;
}
PHB_ITEM hb_itemPutDS( PHB_ITEM pItem, char * szDate )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemPutDS(%p, %s)", pItem, szDate));
if( pItem )
hb_itemClear( pItem );
else
pItem = hb_itemNew( NULL );
pItem->type = HB_IT_DATE;
pItem->item.asDate.value = hb_dateEncStr( szDate );
return pItem;
}
PHB_ITEM hb_itemPutD( PHB_ITEM pItem, long lYear, long lMonth, long lDay )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemPutD(%p, %04i, %02i, %02i)", pItem, lYear, lMonth, lDay));
if( pItem )
hb_itemClear( pItem );
else
pItem = hb_itemNew( NULL );
pItem->type = HB_IT_DATE;
pItem->item.asDate.value = hb_dateEncode( lYear, lMonth, lDay );
return pItem;
}
PHB_ITEM hb_itemPutDL( PHB_ITEM pItem, long lJulian )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemPutDL(%p, %ld)", pItem, lJulian));
if( pItem )
hb_itemClear( pItem );
else
pItem = hb_itemNew( NULL );
pItem->type = HB_IT_DATE;
pItem->item.asDate.value = lJulian;
return pItem;
}
PHB_ITEM hb_itemPutL( PHB_ITEM pItem, BOOL bValue )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemPutL(%p, %d)", pItem, (int) bValue));
if( pItem )
hb_itemClear( pItem );
else
pItem = hb_itemNew( NULL );
pItem->type = HB_IT_LOGICAL;
pItem->item.asLogical.value = bValue;
return pItem;
}
PHB_ITEM hb_itemPutND( PHB_ITEM pItem, double dNumber )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemPutND(%p, %lf)", pItem, dNumber));
if( pItem )
hb_itemClear( pItem );
else
pItem = hb_itemNew( NULL );
pItem->type = HB_IT_DOUBLE;
pItem->item.asDouble.length = ( dNumber >= 10000000000.0 || dNumber <= -1000000000.0 ) ? 20 : 10;
pItem->item.asDouble.decimal = hb_set.HB_SET_DECIMALS;
pItem->item.asDouble.value = dNumber;
return pItem;
}
PHB_ITEM hb_itemPutNI( PHB_ITEM pItem, int iNumber )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemPutNI(%p, %d)", pItem, iNumber));
if( pItem )
hb_itemClear( pItem );
else
pItem = hb_itemNew( NULL );
pItem->type = HB_IT_INTEGER;
pItem->item.asInteger.length = 10;
pItem->item.asInteger.value = iNumber;
return pItem;
}
PHB_ITEM hb_itemPutNL( PHB_ITEM pItem, long lNumber )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemPutNL(%p, %ld)", pItem, lNumber));
if( pItem )
hb_itemClear( pItem );
else
pItem = hb_itemNew( NULL );
pItem->type = HB_IT_LONG;
pItem->item.asLong.length = 10;
pItem->item.asLong.value = lNumber;
return pItem;
}
PHB_ITEM hb_itemPutNLen( PHB_ITEM pItem, double dNumber, int iWidth, int iDec )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemPutNLen(%p, %lf, %d, %d)", pItem, dNumber, iWidth, iDec));
if( iWidth <= 0 || iWidth > 99 )
iWidth = ( dNumber >= 10000000000.0 || dNumber <= -1000000000.0 ) ? 20 : 10;
if( iDec < 0 )
iDec = hb_set.HB_SET_DECIMALS;
if( iDec > 0 )
return hb_itemPutNDLen( pItem, dNumber, iWidth, iDec );
else if( SHRT_MIN <= dNumber && dNumber <= SHRT_MAX )
return hb_itemPutNILen( pItem, ( int ) dNumber, iWidth );
else if( LONG_MIN <= dNumber && dNumber <= LONG_MAX )
return hb_itemPutNLLen( pItem, ( long ) dNumber, iWidth );
else
return hb_itemPutNDLen( pItem, dNumber, iWidth, 0 );
}
PHB_ITEM hb_itemPutNDLen( PHB_ITEM pItem, double dNumber, int iWidth, int iDec )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemPutNDLen(%p, %lf, %d, %d)", pItem, dNumber, iWidth, iDec));
if( pItem )
hb_itemClear( pItem );
else
pItem = hb_itemNew( NULL );
if( iWidth <= 0 || iWidth > 99 )
iWidth = ( dNumber >= 10000000000.0 || dNumber <= -1000000000.0 ) ? 20 : 10;
if( iDec < 0 )
iDec = hb_set.HB_SET_DECIMALS;
pItem->type = HB_IT_DOUBLE;
pItem->item.asDouble.length = iWidth;
pItem->item.asDouble.decimal = iDec;
pItem->item.asDouble.value = dNumber;
return pItem;
}
PHB_ITEM hb_itemPutNILen( PHB_ITEM pItem, int iNumber, int iWidth )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemPutNILen(%p, %d, %d)", pItem, iNumber, iWidth));
if( pItem )
hb_itemClear( pItem );
else
pItem = hb_itemNew( NULL );
if( iWidth <= 0 || iWidth > 99 )
iWidth = 10;
pItem->type = HB_IT_INTEGER;
pItem->item.asInteger.length = iWidth;
pItem->item.asInteger.value = iNumber;
return pItem;
}
PHB_ITEM hb_itemPutNLLen( PHB_ITEM pItem, long lNumber, int iWidth )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemPutNLLen(%p, %ld, %d)", pItem, lNumber, iWidth));
if( pItem )
hb_itemClear( pItem );
else
pItem = hb_itemNew( NULL );
if( iWidth <= 0 || iWidth > 99 )
iWidth = 10;
pItem->type = HB_IT_LONG;
pItem->item.asLong.length = iWidth;
pItem->item.asLong.value = lNumber;
return pItem;
}
PHB_ITEM hb_itemPutPtr( PHB_ITEM pItem, void * pValue )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemPutPtr(%p, %p)", pItem, pValue));
if( pItem )
hb_itemClear( pItem );
else
pItem = hb_itemNew( NULL );
pItem->type = HB_IT_POINTER;
pItem->item.asPointer.value = pValue;
return pItem;
}
void hb_itemGetNLen( PHB_ITEM pItem, int * piWidth, int * piDecimal )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemGetNLen(%p, %p, %p)", pItem, piWidth, piDecimal));
if( pItem )
{
switch( pItem->type )
{
case HB_IT_DOUBLE:
if( piWidth ) *piWidth = ( int ) pItem->item.asDouble.length;
if( piDecimal ) *piDecimal = ( int ) pItem->item.asDouble.decimal;
break;
case HB_IT_LONG:
if( piWidth ) *piWidth = ( int ) pItem->item.asLong.length;
if( piDecimal ) *piDecimal = 0;
break;
case HB_IT_INTEGER:
if( piWidth ) *piWidth = ( int ) pItem->item.asInteger.length;
if( piDecimal ) *piDecimal = 0;
break;
default:
if( piWidth ) *piWidth = 0;
if( piDecimal ) *piDecimal = 0;
}
}
}
ULONG hb_itemSize( PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemSize(%p)", pItem));
if( pItem )
{
switch( pItem->type )
{
case HB_IT_ARRAY:
return hb_arrayLen( pItem );
case HB_IT_STRING:
return pItem->item.asString.length;
}
}
return 0;
}
USHORT hb_itemType( PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemType(%p)", pItem));
if( pItem )
return ( USHORT ) pItem->type;
else
return HB_IT_NIL;
}
char * hb_itemTypeStr( PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemTypeStr(%p)", pItem));
switch( pItem->type & ~HB_IT_BYREF )
{
case HB_IT_ARRAY:
return ( hb_arrayIsObject( pItem ) ? "O" : "A" );
case HB_IT_BLOCK:
return "B";
case HB_IT_DATE:
return "D";
case HB_IT_LOGICAL:
return "L";
case HB_IT_INTEGER:
case HB_IT_LONG:
case HB_IT_DOUBLE:
return "N";
case HB_IT_STRING:
return "C";
case HB_IT_MEMO:
return "M";
}
return "U";
}
/* Internal API, not standard Clipper */
void hb_itemInit( PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemInit(%p)", pItem));
if( pItem )
pItem->type = HB_IT_NIL;
}
void hb_itemClear( PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemClear(%p)", pItem));
if( HB_IS_STRING( pItem ) )
{
if( pItem->item.asString.bPcode )
pItem->item.asString.value = NULL;
else
{
if( --*( pItem->item.asString.puiHolders ) == 0 )
{
hb_xfree( pItem->item.asString.value );
pItem->item.asString.value = NULL;
hb_xfree( pItem->item.asString.puiHolders );
}
}
pItem->item.asString.length = 0;
}
else if( HB_IS_ARRAY( pItem ) && pItem->item.asArray.value )
{
if( --( pItem->item.asArray.value )->uiHolders == 0 )
hb_arrayRelease( pItem );
}
else if( HB_IS_BLOCK( pItem ) )
hb_codeblockDelete( pItem );
else if( HB_IS_MEMVAR( pItem ) )
hb_memvarValueDecRef( pItem->item.asMemvar.value );
pItem->type = HB_IT_NIL;
}
/* Internal API, not standard Clipper */
void hb_itemCopy( PHB_ITEM pDest, PHB_ITEM pSource )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemCopy(%p, %p)", pDest, pSource));
if( pDest->type )
hb_itemClear( pDest );
if( pDest == pSource )
hb_errInternal( HB_EI_ITEMBADCOPY, NULL, "hb_itemCopy()", NULL );
memcpy( pDest, pSource, sizeof( HB_ITEM ) );
if( HB_IS_STRING( pSource ) && ! pSource->item.asString.bPcode )
{
++*( pSource->item.asString.puiHolders );
}
else if( HB_IS_ARRAY( pSource ) )
{
( pSource->item.asArray.value )->uiHolders++;
}
else if( HB_IS_BLOCK( pSource ) )
{
( pSource->item.asBlock.value )->ulCounter++;
}
else if( HB_IS_MEMVAR( pSource ) )
hb_memvarValueIncRef( pSource->item.asMemvar.value );
}
void hb_itemSwap( PHB_ITEM pItem1, PHB_ITEM pItem2 )
{
HB_ITEM temp;
HB_TRACE(HB_TR_DEBUG, ("hb_itemSwap(%p, %p)", pItem1, pItem2));
temp.type = HB_IT_NIL;
hb_itemCopy( &temp, pItem2 );
hb_itemCopy( pItem2, pItem1 );
hb_itemCopy( pItem1, &temp );
hb_itemClear( &temp );
/* Faster, but less safe way
memcpy( &temp, pItem2, sizeof( HB_ITEM ) );
memcpy( pItem2, pItem1, sizeof( HB_ITEM ) );
memcpy( pItem1, &temp, sizeof( HB_ITEM ) );
*/
}
/* Internal API, not standard Clipper */
/* De-references item passed by the reference */
PHB_ITEM hb_itemUnRef( PHB_ITEM pItem )
{
HB_TRACE(HB_TR_DEBUG, ("hb_itemUnRef(%p)", pItem));
while( HB_IS_BYREF( pItem ) )
{
if( HB_IS_MEMVAR( pItem ) )
{
HB_VALUE_PTR pValue;
pValue = *( pItem->item.asMemvar.itemsbase ) + pItem->item.asMemvar.offset +
pItem->item.asMemvar.value;
pItem = &pValue->item;
}
else
{
if( pItem->item.asRefer.value >= 0 )
{
if( pItem->item.asRefer.offset == 0 )
{
/* a reference to a static variable */
pItem = *( pItem->item.asRefer.BasePtr.itemsbase ) +
pItem->item.asRefer.value;
}
else
{
/* a reference to a local variable */
HB_ITEM_PTR *pLocal;
pLocal = *( pItem->item.asRefer.BasePtr.itemsbasePtr ) + pItem->item.asRefer.offset + pItem->item.asRefer.value;
pItem = *pLocal;
}
}
else
{
/* local variable referenced in a codeblock
*/
pItem = hb_codeblockGetRef( pItem->item.asRefer.BasePtr.block, pItem );
}
}
}
return pItem;
}
/* Internal API, not standard Clipper */
/* Check whether two strings are equal (0), smaller (-1), or greater (1) */
int hb_itemStrCmp( PHB_ITEM pFirst, PHB_ITEM pSecond, BOOL bForceExact )
{
char * szFirst;
char * szSecond;
ULONG ulLenFirst;
ULONG ulLenSecond;
ULONG ulMinLen;
ULONG ulCounter;
int iRet = 0; /* Current status */
HB_TRACE(HB_TR_DEBUG, ("hb_itemStrCmp(%p, %p, %d)", pFirst, pSecond, (int) bForceExact));
szFirst = pFirst->item.asString.value;
szSecond = pSecond->item.asString.value;
ulLenFirst = pFirst->item.asString.length;
ulLenSecond = pSecond->item.asString.length;
if( hb_set.HB_SET_EXACT && !bForceExact )
{
/* SET EXACT ON and not using == */
/* Don't include trailing spaces */
while( ulLenFirst > 0 && szFirst[ ulLenFirst - 1 ] == ' ' ) ulLenFirst--;
while( ulLenSecond > 0 && szSecond[ ulLenSecond - 1 ] == ' ' ) ulLenSecond--;
}
ulMinLen = ulLenFirst < ulLenSecond ? ulLenFirst : ulLenSecond;
/* One of the strings is empty */
if( ulMinLen )
{
for( ulCounter = 0; ulCounter < ulMinLen && !iRet; ulCounter++ )
{
/* Difference found */
if( *szFirst != *szSecond )
iRet = ( ( BYTE ) *szFirst < ( BYTE ) *szSecond ) ? -1 : 1;
else /* TODO : #define some constants */
{
szFirst++;
szSecond++;
}
}
if( hb_set.HB_SET_EXACT || bForceExact || ulLenSecond > ulCounter )
{
/* Force an exact comparison */
if( !iRet && ulLenFirst != ulLenSecond )
/* If length is different ! */
iRet = ( ulLenFirst < ulLenSecond ) ? -1 : 1;
}
}
else
{
/* Both empty ? */
if( ulLenFirst != ulLenSecond )
{
if( hb_set.HB_SET_EXACT || bForceExact )
iRet = ( ulLenFirst < ulLenSecond ) ? -1 : 1;
else
iRet = ( ulLenSecond == 0 ) ? 0 : -1;
}
else
/* Both empty => Equal ! */
iRet = 0;
}
return iRet;
}
/* converts a numeric to a string with optional width & precision.
This function should be used by any function that wants to format numeric
data for displaying, printing, or putting in a database.
Note: The caller is responsible for calling hb_xfree to free the results
buffer, but ONLY if the return value is not a NULL pointer! (If a NULL
pointer is returned, then there was a conversion error.)
*/
char * hb_itemStr( PHB_ITEM pNumber, PHB_ITEM pWidth, PHB_ITEM pDec )
{
char * szResult = NULL;
HB_TRACE(HB_TR_DEBUG, ("hb_itemStr(%p, %p, %p)", pNumber, pWidth, pDec));
if( pNumber )
{
/* Default to the width and number of decimals specified by the item,
with a limit of 90 integer places, plus one space for the sign. */
int iWidth;
int iDec;
hb_itemGetNLen( pNumber, &iWidth, &iDec );
if( iWidth > 90 )
iWidth = 90;
/* Limit the number of decimal places. */
if( hb_set.HB_SET_FIXED )
/* If fixed mode is enabled, always use the default. */
iDec = hb_set.HB_SET_DECIMALS;
else if( iDec > 9 )
/* Otherwise, the maximum is 9. */
iDec = 9;
if( pWidth )
{
/* If the width parameter is specified, override the default value
and set the number of decimals to zero */
int iWidthPar = hb_itemGetNI( pWidth );
if( iWidthPar < 1 )
iWidth = 10; /* If 0 or negative, use default */
else
iWidth = iWidthPar;
iDec = 0;
}
if( pDec )
{
/* This function does not include the decimal places in the width,
so the width must be adjusted downwards, if the decimal places
parameter is greater than 0 */
int iDecPar = hb_itemGetNI( pDec );
if( iDecPar < 0 )
iDec = 0;
else if( iDecPar > 0 )
{
iDec = iDecPar;
iWidth -= ( iDec + 1 );
}
}
if( iWidth )
{
/* We at least have a width value */
int iBytes;
int iSize = ( iDec ? iWidth + 1 + iDec : iWidth );
/* Be paranoid and use a large amount of padding */
szResult = ( char * ) hb_xgrab( HB_MAX_DOUBLE_LENGTH );
if( HB_IS_DOUBLE( pNumber ) || iDec != 0 )
{
double dNumber = hb_itemGetND( pNumber );
#if defined(__BORLANDC__) || defined(__WATCOMC__)
#else
static double s_dInfinity = 0;
static double s_bInfinityInit = FALSE;
if( ! s_bInfinityInit )
{
s_dInfinity = -log( ( double ) 0 );
s_bInfinityInit = TRUE;
}
#endif
if( pNumber->item.asDouble.length == 99
#if defined(__BORLANDC__) || defined(__WATCOMC__)
/* No more checks for Borland C, which returns 0 for log( 0 ),
and is therefore unable to test for infinity */
#else
|| dNumber == s_dInfinity || dNumber == -s_dInfinity
#endif
)
/* Numeric overflow */
iBytes = iSize + 1;
else
{
if( HB_IS_DOUBLE( pNumber ) && iDec < pNumber->item.asDouble.decimal )
dNumber = hb_numRound( dNumber, iDec );
if( iDec == 0 )
iBytes = sprintf( szResult, "%*.0f", iSize, dNumber );
else
iBytes = sprintf( szResult, "%*.*f", iSize, iDec, dNumber );
}
}
else
{
switch( pNumber->type & ~HB_IT_BYREF )
{
case HB_IT_INTEGER:
iBytes = sprintf( szResult, "%*i", iWidth, pNumber->item.asInteger.value );
break;
case HB_IT_LONG:
iBytes = sprintf( szResult, "%*li", iWidth, pNumber->item.asLong.value );
break;
default:
iBytes = 0;
szResult[ 0 ] = '\0'; /* null string */
break;
}
}
/* Set to asterisks in case of overflow */
if( iBytes > iSize )
{
memset( szResult, '*', iSize );
szResult[ iSize ] = '\0';
}
}
}
return szResult;
}
/* NOTE: The caller must free the pointer if the bFreeReq param gets set to
TRUE, this trick is required to stay thread safe, while minimize
memory allocation and buffer copying.
As a side effect the caller should never modify the returned buffer
since it may point to a constant value. [vszakats] */
char * hb_itemString( PHB_ITEM pItem, ULONG * ulLen, BOOL * bFreeReq )
{
char * buffer;
HB_TRACE(HB_TR_DEBUG, ("hb_itemString(%p, %p, %p)", pItem, ulLen, bFreeReq));
switch( pItem->type )
{
case HB_IT_STRING:
case HB_IT_MEMO:
buffer = hb_itemGetCPtr( pItem );
* ulLen = hb_itemGetCLen( pItem );
* bFreeReq = FALSE;
break;
case HB_IT_DATE:
{
char szDate[ 9 ];
hb_dateDecStr( szDate, pItem->item.asDate.value );
buffer = ( char * ) hb_xgrab( 11 );
hb_dateFormat( szDate, buffer, hb_set.HB_SET_DATEFORMAT );
* ulLen = strlen( buffer );
* bFreeReq = TRUE;
}
break;
case HB_IT_DOUBLE:
case HB_IT_INTEGER:
case HB_IT_LONG:
buffer = hb_itemStr( pItem, NULL, NULL );
if( buffer )
{
* ulLen = strlen( buffer );
* bFreeReq = TRUE;
}
else
{
buffer = "";
* ulLen = 0;
* bFreeReq = FALSE;
}
break;
case HB_IT_NIL:
buffer = "NIL";
* ulLen = 3;
* bFreeReq = FALSE;
break;
case HB_IT_LOGICAL:
buffer = ( hb_itemGetL( pItem ) ? ".T." : ".F." );
* ulLen = 3;
* bFreeReq = FALSE;
break;
default:
buffer = "";
* ulLen = 0;
* bFreeReq = FALSE;
}
return buffer;
}
/* This function is used by all of the PAD functions to prepare the argument
being padded. If date, convert to string using hb_dateFormat(). If numeric,
convert to unpadded string. Return pointer to string and set string length */
char * hb_itemPadConv( PHB_ITEM pItem, char * buffer, ULONG * pulSize )
{
char * szText;
HB_TRACE(HB_TR_DEBUG, ("hb_itemPadConv(%p, %p, %p)", pItem, buffer, pulSize));
if( pItem )
{
if( HB_IS_STRING( pItem ) )
{
szText = hb_itemGetCPtr( pItem );
*pulSize = hb_itemGetCLen( pItem );
}
else if( HB_IS_DATE( pItem ) )
{
char szDate[ 9 ];
szText = hb_dateFormat( hb_pardsbuff( szDate, 1 ), buffer, hb_set.HB_SET_DATEFORMAT );
*pulSize = strlen( szText );
}
else if( HB_IS_INTEGER( pItem ) )
{
sprintf( buffer, "%d", hb_itemGetNI( pItem ) );
szText = buffer;
*pulSize = strlen( szText );
}
else if( HB_IS_LONG( pItem ) )
{
sprintf( buffer, "%ld", hb_itemGetNL( pItem ) );
szText = buffer;
*pulSize = strlen( szText );
}
else if( HB_IS_DOUBLE( pItem ) )
{
int iDecimal;
hb_itemGetNLen( pItem, NULL, &iDecimal );
sprintf( buffer, "%.*f", iDecimal, hb_itemGetND( pItem ) );
szText = buffer;
*pulSize = strlen( szText );
}
else
szText = NULL;
}
else
szText = NULL;
return szText;
}
PHB_ITEM hb_itemValToStr( PHB_ITEM pItem )
{
PHB_ITEM pResult;
char * buffer;
ULONG ulLen;
BOOL bFreeReq;
HB_TRACE(HB_TR_DEBUG, ("hb_itemValToStr(%p)", pItem));
buffer = hb_itemString( pItem, &ulLen, &bFreeReq );
pResult = hb_itemPutCL( NULL, buffer, ulLen );
if( bFreeReq )
hb_xfree( buffer );
return pResult;
}
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