ccf905a9d5
* harbour/source/rtl/hbstrfmt.c
+ added precision support for %s and %d.
COMMENT: I've used GNU printf() function for test. Some of
formats is not supported by it. For example, zero padding is
ignored if left alignment is used, etc. I'm not sure if it is
intentional.
492 lines
14 KiB
C
492 lines
14 KiB
C
/*
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* $Id$
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*/
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/*
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* HB_STRFORMAT()/hb_strFormat() functions.
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*
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* Copyright 2008 Mindaugas Kavaliauskas <dbtopas at dbtopas.lt>
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* www - http://www.harbour-project.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
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*
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* As a special exception, the Harbour Project gives permission for
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* additional uses of the text contained in its release of Harbour.
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*
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* The exception is that, if you link the Harbour libraries with other
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* files to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the Harbour library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the Harbour
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* Project under the name Harbour. If you copy code from other
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* Harbour Project or Free Software Foundation releases into a copy of
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* Harbour, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for Harbour, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice.
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*
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*/
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#include "hbapi.h"
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#include "hbapiitm.h"
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#include "hbapierr.h"
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typedef struct
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{
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char * pData;
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ULONG ulLen;
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ULONG ulMax;
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} BUFFERTYPE;
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static void bufadd( BUFFERTYPE * pBuf, const char * pAdd, ULONG ulLen )
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{
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if( pBuf->ulLen + ulLen >= pBuf->ulMax )
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{
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pBuf->ulMax += ( pBuf->ulMax >> 1 ) + ulLen;
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pBuf->pData = ( char * ) hb_xrealloc( pBuf->pData, pBuf->ulMax );
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}
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memcpy( pBuf->pData + pBuf->ulLen, pAdd, ulLen );
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pBuf->ulLen += ulLen;
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pBuf->pData[ pBuf->ulLen ] = '\0';
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}
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PHB_ITEM hb_strFormat( PHB_ITEM pItemReturn, PHB_ITEM pItemFormat, int iCount, PHB_ITEM * pItemArray )
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{
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BUFFERTYPE buffer;
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PHB_ITEM pItem;
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char *pFmt, *pFmtEnd, *pFmtSave;
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int i, iParam, iParamNo, iWidth, iDec;
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ULONG ulSize;
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BOOL fLeftAlign, fForceSign, fPadZero, fSpaceSign, fSign;
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pFmt = hb_itemGetCPtr( pItemFormat );
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ulSize = hb_itemGetCLen( pItemFormat );
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pFmtEnd = pFmt + ulSize;
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buffer.ulMax = ulSize + 16;
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buffer.ulLen = 0;
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buffer.pData = ( char* ) hb_xgrab( buffer.ulMax );
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buffer.pData[ 0 ] = '\0';
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iParam = 0;
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while( pFmt < pFmtEnd )
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{
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if( *pFmt != '%' )
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{
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bufadd( &buffer, pFmt++, 1 );
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continue;
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}
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pFmtSave = pFmt;
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if( ++pFmt >= pFmtEnd )
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continue;
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if( *pFmt == '%' )
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{
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bufadd( &buffer, pFmt++, 1 );
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continue;
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}
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iWidth = iDec = -1;
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fLeftAlign = fForceSign = fPadZero = fSpaceSign = 0;
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/* parse parameter number */
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iParamNo = 0;
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while( HB_ISDIGIT( *pFmt ) )
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iParamNo = iParamNo * 10 + *pFmt++ - '0';
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if( iParamNo > 0 && *pFmt == '$' )
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{
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pFmt++;
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}
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else
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{
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iParamNo = -1;
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pFmt = pFmtSave + 1;
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}
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/* Parse flags */
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do
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{
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switch( *pFmt )
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{
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case '-':
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fLeftAlign = 1;
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continue;
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case '+':
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fForceSign = 1;
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continue;
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case ' ':
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fSpaceSign = 1;
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continue;
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case '0':
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fPadZero = 1;
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continue;
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}
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break;
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} while( * ++pFmt );
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/* Parse width */
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if( HB_ISDIGIT( *pFmt ) )
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{
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iWidth = 0;
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while( HB_ISDIGIT( *pFmt ) )
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iWidth = iWidth * 10 + *pFmt++ - '0';
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}
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/* Parse decimals */
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if( *pFmt == '.' )
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{
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pFmt++;
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iDec = 0;
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if( HB_ISDIGIT( *pFmt ) )
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{
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while( HB_ISDIGIT( *pFmt ) )
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iDec = iDec * 10 + *pFmt++ - '0';
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}
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}
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/* Parse specifier */
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if( *pFmt == 'c' || *pFmt == 'd' || *pFmt == 'f' || *pFmt == 's' )
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{
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if( iParamNo == -1 )
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iParamNo = ++iParam;
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if( iParamNo > iCount )
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{
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hb_xfree( buffer.pData );
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hb_errRT_BASE_SubstR( EG_ARG, 1099, NULL, HB_ERR_FUNCNAME, HB_ERR_ARGS_BASEPARAMS );
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return NULL;
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}
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pItem = pItemArray[ iParamNo - 1 ];
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}
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else
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pItem = NULL;
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switch( *pFmt )
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{
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case 'c':
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{
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char buf[ 1 ];
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buf[ 0 ] = ( char ) hb_itemGetNI( pItem );
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if( fLeftAlign )
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{
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bufadd( &buffer, buf, 1 );
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}
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if( iWidth > 1 )
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{
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for( i = 1; i < iWidth; i++ )
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bufadd( &buffer, " ", 1 );
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}
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if( ! fLeftAlign )
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{
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bufadd( &buffer, buf, 1 );
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}
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break;
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}
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case 'd':
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{
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char * pStr = NULL;
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const char * pStr2;
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int iSize, iExtra;
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fSign = 0;
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if( HB_IS_NUMERIC( pItem ) )
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{
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iSize = sizeof( HB_LONG ) * 3 + 1;
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pStr2 = pStr = ( char * ) hb_xgrab( iSize + 1 );
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hb_itemStrBuf( pStr, pItem, iSize, 0 );
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while( *pStr2 == ' ' )
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pStr2++;
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iSize = strlen( pStr2 );
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if( *pStr2 == '-' )
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{
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fSign = 1;
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iSize--;
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pStr2++;
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}
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}
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else if( HB_IS_LOGICAL( pItem ) )
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{
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iSize = 1;
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if( hb_itemGetL( pItem ) )
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pStr2 = "1";
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else
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pStr2 = "0";
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}
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else
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{
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iSize = 1;
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pStr2 = "0";
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}
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iExtra = 0;
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if( fForceSign || fSpaceSign || fSign )
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iExtra = 1;
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/* If decimals is set, zero padding flag is ignored */
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if( iDec >= 0 ) fPadZero = 0;
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if( fLeftAlign )
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{
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/* Zero padding is ignored on left Align */
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/* ForceSign has priority over SpaceSign */
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if( fSign )
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bufadd( &buffer, "-", 1 );
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else if( fForceSign )
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bufadd( &buffer, "+", 1 );
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else if( fSpaceSign )
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bufadd( &buffer, " ", 1 );
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for( i = iSize; i < iDec; i++ )
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bufadd( &buffer, "0", 1 );
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bufadd( &buffer, pStr2, ( ULONG ) iSize );
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if( iDec > iSize )
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iSize = iDec;
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for( i = iSize + iExtra; i < iWidth; i++ )
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bufadd( &buffer, " ", 1 );
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}
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else
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{
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/* Right align */
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if( fPadZero )
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{
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/* ForceSign has priority over SpaceSign */
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if( fSign )
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bufadd( &buffer, "-", 1 );
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else if( fForceSign )
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bufadd( &buffer, "+", 1 );
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else if( fSpaceSign )
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bufadd( &buffer, " ", 1 );
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for( i = iSize + iExtra; i < iWidth; i++ )
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bufadd( &buffer, "0", 1 );
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bufadd( &buffer, pStr2, strlen( pStr2 ) );
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}
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else
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{
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for( i = (iSize > iDec ? iSize : iDec) + iExtra; i < iWidth; i++ )
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bufadd( &buffer, " ", 1 );
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/* ForceSign has priority over SpaceSign */
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if( fSign )
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bufadd( &buffer, "-", 1 );
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else if( fForceSign )
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bufadd( &buffer, "+", 1 );
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else if( fSpaceSign )
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bufadd( &buffer, " ", 1 );
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for( i = iSize; i < iDec; i++ )
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bufadd( &buffer, "0", 1 );
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bufadd( &buffer, pStr2, ( ULONG ) iSize );
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}
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}
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if( pStr )
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hb_xfree( pStr );
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break;
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}
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case 'f':
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{
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char * pStr = NULL;
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const char * pStr2;
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int iSize, iExtra, iD;
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if( HB_IS_NUMERIC( pItem ) )
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{
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hb_itemGetNLen( pItem, &iSize, &iD );
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if( iDec != -1 )
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{
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iSize += iDec - iD + 1;
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iD = iDec;
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}
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/* Let 255 be a limit for number length */
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if( iSize > 255 )
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iSize = 255;
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if( iD > 253 )
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iD = 253;
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if( iSize < iD + 2 )
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iSize = iD + 2;
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pStr2 = pStr = ( char * ) hb_xgrab( iSize + 1 );
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hb_itemStrBuf( pStr, pItem, iSize, iD );
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if( pStr[ 0 ] == '*' && iSize < 255 )
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{
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pStr2 = pStr = ( char * ) hb_xrealloc( pStr, 256 );
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hb_itemStrBuf( pStr, pItem, 255, iD );
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}
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while( *pStr2 == ' ' )
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pStr2++;
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iSize = strlen( pStr2 );
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}
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else
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{
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iSize = 1;
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pStr2 = "0";
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}
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iExtra = 0;
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if( ( fForceSign || fSpaceSign ) && *pStr2 != '-' )
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iExtra = 1;
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if( fLeftAlign )
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{
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/* Zero padding is ignored on left Align */
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if( *pStr2 != '-' )
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{
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/* ForceSign has priority over SpaceSign */
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if( fForceSign )
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bufadd( &buffer, "+", 1 );
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else
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{
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if( fSpaceSign )
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bufadd( &buffer, " ", 1 );
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}
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}
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bufadd( &buffer, pStr2, ( ULONG ) iSize );
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for( i = iSize + iExtra; i < iWidth; i++ )
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bufadd( &buffer, " ", 1 );
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}
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else
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{
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/* Right align */
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if( fPadZero )
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{
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if( *pStr2 == '-' )
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{
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bufadd( &buffer, pStr2++, 1 );
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}
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else
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{
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/* ForceSign has priority over SpaceSign */
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if( fForceSign )
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bufadd( &buffer, "+", 1 );
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else
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{
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if( fSpaceSign )
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bufadd( &buffer, " ", 1 );
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}
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}
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for( i = iSize + iExtra; i < iWidth; i++ )
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bufadd( &buffer, "0", 1 );
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bufadd( &buffer, pStr2, strlen( pStr2 ) );
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}
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else
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{
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for( i = iSize + iExtra; i < iWidth; i++ )
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bufadd( &buffer, " ", 1 );
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if( *pStr2 != '-' )
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{
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/* ForceSign has priority over SpaceSign */
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if( fForceSign )
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bufadd( &buffer, "+", 1 );
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else
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{
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if( fSpaceSign )
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bufadd( &buffer, " ", 1 );
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}
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}
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bufadd( &buffer, pStr2, ( ULONG ) iSize );
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}
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}
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if( pStr )
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hb_xfree( pStr );
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break;
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}
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case 's':
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{
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char * pStr = hb_itemGetCPtr( pItem );
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ulSize = hb_itemGetCLen( pItem );
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if( iDec >= 0 )
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{
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if( ( ULONG ) iDec < ulSize )
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ulSize = iDec;
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}
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if( fLeftAlign )
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bufadd( &buffer, pStr, ulSize );
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if( iWidth > 1 )
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{
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for( i = ( int ) ulSize; i < iWidth; i++ )
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bufadd( &buffer, " ", 1 );
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}
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if( ! fLeftAlign )
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bufadd( &buffer, pStr, ulSize );
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break;
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}
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default:
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bufadd( &buffer, pFmtSave, pFmt - pFmtSave + 1 );
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}
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pFmt++;
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}
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pItemReturn = hb_itemPutCL( pItemReturn, buffer.pData, buffer.ulLen );
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hb_xfree( buffer.pData );
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return pItemReturn;
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}
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HB_FUNC( HB_STRFORMAT )
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{
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PHB_ITEM pFormat = hb_param( 1, HB_IT_STRING );
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int i, iParams = hb_pcount();
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PHB_ITEM * pItemArray = NULL;
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if( pFormat )
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{
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if( iParams > 1 )
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{
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pItemArray = ( PHB_ITEM * ) hb_xgrab( ( iParams - 1 ) * sizeof( PHB_ITEM ) );
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for( i = 1; i < iParams; i++ )
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pItemArray[ i - 1 ] = hb_param( i + 1, HB_IT_ANY );
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}
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hb_itemReturnRelease( hb_strFormat( NULL, pFormat, iParams - 1, pItemArray ) );
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if( iParams > 1 )
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hb_xfree( pItemArray );
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}
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else
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hb_errRT_BASE_SubstR( EG_ARG, 1099, NULL, HB_ERR_FUNCNAME, HB_ERR_ARGS_BASEPARAMS );
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}
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