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1da71cd5eb875be91bccf8f6d246d53379d4a911
harbour-core/src/rtl/mlcfunc.c
Viktor Szakats 5a2a287752 2017-09-08 16:00 UTC Viktor Szakats (vszakats users.noreply.github.com) 
* *
    * partial sync with the 3.4 fork codebase. These are the things
      synces for the most part:
      - copyright headers
      - grammar/typos in comments and some readmes
      - comment/whitespace/decorations
      - variable scoping in C files
      - DO CASE/SWITCH and some other alternate syntax usage
      - minimal amount of human readable text in strings
      - minor code updates
      - HB_TRACE() void * casts for pointers and few other changes to
        avoid C compiler warnings
      - various other, minor code cleanups
      - only Harbour/C code/headers were touched in src, utils, contrib,
        include. No 3rd party code, no make files, and with just a few
        exceptions, no 'tests' code was touched.
      - certain components were not touched were 3.4 diverged too much
        already, like f.e. hbmk2, hbssl, hbcurl, hbexpat
      - the goal was that no actual program logic should be altered by
        these changes. Except some possible minor exceptions, any such
        change is probably a bug in this patch.
      It's a massive patch, if you find anything broken after it, please
      open an Issue with the details. Build test was done on macOS.
      The goal is make it easier to see what actual code/logic was changed
      in 3.4 compared to 3.2 and to make patches easier to apply in both
      ways.
2017-09-08 16:25:13 +00:00

711 lines
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/*
* memo line functions: MemoLine(), MLCount(), MLPos(), MLCToPos(), MPosToLC()
*
* Copyright 2012 Przemyslaw Czerpak <druzus / at / priv.onet.pl>
*
* 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 program; see the file LICENSE.txt. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301 USA (or visit https://www.gnu.org/licenses/).
*
* 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 "hbapi.h"
#include "hbapiitm.h"
#include "hbapicdp.h"
#include "hbset.h"
#include "hbvm.h"
#define HB_EOL_BUFFER_SIZE 4
typedef struct
{
const char * szEOL;
HB_SIZE nLen;
} HB_EOL_INFO, * PHB_EOL_INFO;
typedef struct
{
const char * pszString;
HB_SIZE nLen;
HB_SIZE nLineLength;
HB_SIZE nTabSize;
HB_BOOL fWordWrap;
int iEOLs;
PHB_EOL_INFO pEOLs;
PHB_CODEPAGE cdp;
HB_SIZE nOffset;
HB_SIZE nMaxCol;
HB_SIZE nMaxPos;
HB_SIZE nCol;
HB_EOL_INFO EOL_buffer[ HB_EOL_BUFFER_SIZE ];
}
HB_MLC_INFO, * PHB_MLC_INFO;
static void hb_mlGetEOLs( PHB_MLC_INFO pMLC, int iParam )
{
int iEOLs = 0;
HB_SIZE nLen;
pMLC->pEOLs = pMLC->EOL_buffer;
/* NOTE: This is a parameter extension (HB_EXTENSION) which breaks
our effort to keep strict parameter compatibility with
Clipper 5.x. In this case we've resorted to a compromise
because there was no other idea which seemed natural enough.
Clipper will ignore these parameters and use CRLF EOL hard
coded. [vszakats] */
#ifndef HB_CLP_STRICT /* HB_EXTENSION */
nLen = hb_parclen( iParam );
if( nLen )
{
pMLC->pEOLs[ 0 ].szEOL = hb_parc( iParam );
pMLC->pEOLs[ 0 ].nLen = nLen;
iEOLs = 1;
}
else if( HB_ISARRAY( iParam ) )
{
PHB_ITEM pArray = hb_param( iParam, HB_IT_ARRAY );
HB_SIZE nSize = hb_arrayLen( pArray ), n;
for( n = 1; n <= nSize; ++n )
{
if( hb_arrayGetCLen( pArray, n ) > 0 )
++iEOLs;
}
if( iEOLs )
{
if( iEOLs > HB_EOL_BUFFER_SIZE )
pMLC->pEOLs = ( PHB_EOL_INFO ) hb_xgrab( sizeof( HB_EOL_INFO ) * iEOLs );
iEOLs = 0;
for( n = 1; n <= nSize; ++n )
{
nLen = hb_arrayGetCLen( pArray, n );
if( nLen > 0 )
{
pMLC->pEOLs[ iEOLs ].szEOL = hb_arrayGetCPtr( pArray, n );
pMLC->pEOLs[ iEOLs ].nLen = nLen;
++iEOLs;
}
}
}
}
#else
HB_SYMBOL_UNUSED( iParam );
HB_SYMBOL_UNUSED( nLen );
#endif
if( iEOLs == 0 )
{
pMLC->pEOLs[ 0 ].szEOL = hb_setGetEOL();
if( ! pMLC->pEOLs[ 0 ].szEOL || ! pMLC->pEOLs[ 0 ].szEOL[ 0 ] )
pMLC->pEOLs[ 0 ].szEOL = hb_conNewLine();
pMLC->pEOLs[ 0 ].nLen = strlen( pMLC->pEOLs[ 0 ].szEOL );
iEOLs = pMLC->pEOLs[ 0 ].nLen ? 1 : 0;
}
pMLC->iEOLs = iEOLs;
}
static HB_BOOL hb_mlInit( PHB_MLC_INFO pMLC, int iParAdd )
{
HB_ISIZ nSize = hb_parnsdef( 2, 79 );
pMLC->pszString = hb_parc( 1 );
if( pMLC->pszString && nSize > 0 )
{
pMLC->nOffset = pMLC->nMaxCol = pMLC->nMaxPos = pMLC->nCol = 0;
pMLC->nLineLength = nSize;
pMLC->nLen = hb_parclen( 1 );
pMLC->nTabSize = hb_parnsdef( 3 + iParAdd, 4 );
pMLC->fWordWrap = hb_parldef( 4 + iParAdd, HB_TRUE );
#ifdef HB_CLP_STRICT
if( pMLC->nLineLength > 254 )
pMLC->nLineLength = 79;
#endif
if( pMLC->nTabSize >= pMLC->nLineLength )
pMLC->nTabSize = pMLC->nLineLength - 1;
if( pMLC->nTabSize == 0 )
pMLC->nTabSize = 1;
pMLC->cdp = hb_vmCDP();
if( ! HB_CDP_ISCHARIDX( pMLC->cdp ) )
pMLC->cdp = NULL;
hb_mlGetEOLs( pMLC, 5 + iParAdd );
return HB_TRUE;
}
return HB_FALSE;
}
static void hb_mlExit( PHB_MLC_INFO pMLC )
{
if( pMLC->iEOLs > HB_EOL_BUFFER_SIZE )
hb_xfree( pMLC->pEOLs );
}
static int hb_mlEol( PHB_MLC_INFO pMLC )
{
const char * pszString = pMLC->pszString + pMLC->nOffset;
HB_SIZE nLen = pMLC->nLen - pMLC->nOffset;
PHB_EOL_INFO pEOLs = pMLC->pEOLs;
int i;
for( i = 0; i < pMLC->iEOLs; ++i )
{
if( pszString[ 0 ] == pEOLs[ i ].szEOL[ 0 ] &&
( pEOLs[ i ].nLen == 1 ||
( nLen >= pEOLs[ i ].nLen &&
memcmp( pszString, pEOLs[ i ].szEOL, pEOLs[ i ].nLen ) == 0 ) ) )
return i;
}
return -1;
}
static HB_SIZE hb_mlGetLine( PHB_MLC_INFO pMLC )
{
HB_SIZE nBlankCol = 0, nBlankPos = 0, nLastCol = 0, nLastPos;
int i;
pMLC->nCol = 0;
if( pMLC->nOffset >= pMLC->nLen )
return HB_FALSE;
while( pMLC->nOffset < pMLC->nLen )
{
HB_WCHAR ch;
if( pMLC->pszString[ pMLC->nOffset ] == HB_CHAR_SOFT1 &&
pMLC->pszString[ pMLC->nOffset + 1 ] == HB_CHAR_SOFT2 )
{
if( pMLC->nMaxCol && pMLC->nCol )
break;
if( pMLC->nOffset < pMLC->nMaxPos )
nLastCol = pMLC->nCol;
pMLC->nOffset += 2;
if( ! pMLC->fWordWrap )
break;
else if( nBlankPos + 2 == pMLC->nOffset )
nBlankPos += 2;
continue;
}
i = hb_mlEol( pMLC );
if( i >= 0 )
{
if( pMLC->nOffset < pMLC->nMaxPos )
nLastCol = pMLC->nCol;
if( pMLC->nMaxCol == 0 )
pMLC->nOffset += pMLC->pEOLs[ i ].nLen;
break;
}
else if( ! pMLC->fWordWrap && pMLC->nCol >= pMLC->nLineLength )
break;
nLastPos = pMLC->nOffset;
if( pMLC->cdp )
{
if( ! HB_CDPCHAR_GET( pMLC->cdp, pMLC->pszString, pMLC->nLen, &pMLC->nOffset, &ch ) )
break;
}
else
ch = pMLC->pszString[ pMLC->nOffset++ ];
if( pMLC->nOffset <= pMLC->nMaxPos )
nLastCol = pMLC->nCol;
pMLC->nCol += ch == HB_CHAR_HT ?
pMLC->nTabSize - ( pMLC->nCol % pMLC->nTabSize ) : 1;
if( pMLC->nMaxCol && pMLC->nCol >= pMLC->nMaxCol )
{
if( pMLC->nCol > pMLC->nMaxCol )
pMLC->nOffset = nLastPos;
break;
}
else if( pMLC->nCol > pMLC->nLineLength )
{
if( pMLC->fWordWrap )
{
if( ch == ' ' || ch == HB_CHAR_HT )
break;
else if( nBlankCol != 0 )
{
pMLC->nCol = nBlankCol;
pMLC->nOffset = nBlankPos;
}
else
pMLC->nOffset = nLastPos;
}
else
pMLC->nOffset = nLastPos;
break;
}
if( pMLC->nCol > 1 && ( ch == ' ' || ch == HB_CHAR_HT ) )
{
nBlankCol = pMLC->nCol;
nBlankPos = pMLC->nOffset;
}
}
if( pMLC->nMaxPos && pMLC->nCol > nLastCol )
pMLC->nCol = nLastCol;
else if( pMLC->nCol > pMLC->nLineLength )
pMLC->nCol = pMLC->nLineLength;
return HB_TRUE;
}
/* MemoLine( <cString>, [ <nLineLength>=79 ],
* [ <nLineNumber>=1 ],
* [ <nTabSize>=4 ], [ <lWrap>=.T. ],
* [ <cEOL>|<acEOLs> ],
* [ <lPad>=.T. ] ) --> <cLine>
*
* NOTE: <lPad> is undocumented parameter and will be removed and
* replaced by other solution in the future.
*/
HB_FUNC( MEMOLINE )
{
HB_ISIZ nLine = hb_parnsdef( 3, 1 );
char * szLine = NULL;
HB_SIZE nLen = 0;
if( nLine >= 1 )
{
HB_MLC_INFO MLC;
if( hb_mlInit( &MLC, 1 ) )
{
while( --nLine )
{
if( ! hb_mlGetLine( &MLC ) )
break;
}
if( nLine == 0 )
{
HB_BOOL fPad = hb_parldef( 7, HB_TRUE );
HB_SIZE nIndex, nSize, nCol;
nIndex = MLC.nOffset;
/* CA-Cl*pper also does not check if line exists and always
* fill one line more, i.e.:
* for i := 0 to 4
* ? "[" + MemoLine( " ", 20, i ) + "]"
* next
* [druzus]
*/
hb_mlGetLine( &MLC );
if( MLC.cdp )
nSize = ( MLC.nOffset - nIndex ) + MLC.nLineLength;
else
nSize = MLC.nLineLength;
szLine = ( char * ) hb_xgrab( nSize + 1 );
nCol = 0;
while( nIndex < MLC.nLen && nCol < MLC.nCol )
{
if( MLC.pszString[ nIndex ] == HB_CHAR_SOFT1 &&
MLC.pszString[ nIndex + 1 ] == HB_CHAR_SOFT2 )
nIndex += 2 ;
else
{
HB_WCHAR wc;
if( MLC.cdp )
{
if( ! HB_CDPCHAR_GET( MLC.cdp, MLC.pszString, MLC.nLen, &nIndex, &wc ) )
break;
}
else
wc = MLC.pszString[ nIndex++ ];
if( wc == HB_CHAR_HT )
{
HB_SIZE n = MLC.nTabSize - ( nLen % MLC.nTabSize );
do
{
szLine[ nLen++ ] = ' ';
}
while( ++nCol < MLC.nCol && --n );
}
else
{
if( MLC.cdp )
{
if( ! HB_CDPCHAR_PUT( MLC.cdp, szLine, nSize, &nLen, wc ) )
break;
}
else
szLine[ nLen++ ] = ( char ) wc;
++nCol;
}
}
}
if( nCol < MLC.nLineLength )
{
nCol = MLC.nLineLength - nCol;
if( nCol > nSize - nLen )
nCol = nSize - nLen;
if( ! fPad && nCol > 0 )
nCol = nIndex < MLC.nLen &&
( MLC.pszString[ nIndex ] == ' ' ||
MLC.pszString[ nIndex ] == HB_CHAR_HT ) ? 1 : 0;
if( nCol > 0 )
{
memset( szLine + nLen, ' ', nCol );
nLen += nCol;
}
}
}
hb_mlExit( &MLC );
}
}
if( szLine == NULL )
hb_retc_null();
else
hb_retclen_buffer( szLine, nLen );
}
/* MLCount( <cString>, [ <nLineLength>=79 ],
* [ <nTabSize>=4 ], [ <lWrap>=.T. ],
* [ <cEOL>|<acEOLs> ] ) --> <nLines>
*/
HB_FUNC( MLCOUNT )
{
HB_MLC_INFO MLC;
HB_SIZE nLines = 0;
if( hb_mlInit( &MLC, 0 ) )
{
while( hb_mlGetLine( &MLC ) )
++nLines;
hb_mlExit( &MLC );
}
hb_retns( nLines );
}
/* MLPos( <cString>, [ <nLineLength>=79 ],
* [ <nLineNumber>=1 ],
* [ <nTabSize>=4 ], [ <lWrap>=.T. ],
* [ <cEOL>|<acEOLs> ] ) --> <nLinePos>
*/
HB_FUNC( MLPOS )
{
HB_MLC_INFO MLC;
HB_ISIZ nLine = hb_parnsdef( 3, 1 );
HB_SIZE nOffset = 0;
if( nLine >= 1 )
{
if( hb_mlInit( &MLC, 1 ) )
{
while( --nLine )
{
if( ! hb_mlGetLine( &MLC ) )
break;
}
if( nLine <= 1 )
{
nOffset = MLC.nOffset;
if( MLC.cdp )
nOffset = hb_cdpTextLen( MLC.cdp, MLC.pszString, nOffset );
if( MLC.nOffset < MLC.nLen )
++nOffset;
}
hb_mlExit( &MLC );
}
}
hb_retns( nOffset );
}
/* MLCToPos( <cString>, [ <nLineLength>=79 ],
* [ <nLine>=1 ], [ <nCol>=0 ],
* [ <nTabSize>=4 ], [ <lWrap>=.T. ],
* [ <cEOL>|<acEOLs> ] ) --> <nPos>
*/
HB_FUNC( MLCTOPOS )
{
HB_SIZE nLine = hb_parns( 3 );
HB_SIZE nCol = hb_parns( 4 );
HB_SIZE nOffset = 0;
if( nLine > 0 && HB_ISNUM( 4 ) )
{
HB_MLC_INFO MLC;
if( hb_mlInit( &MLC, 2 ) )
{
if( MLC.nLineLength > 4 )
{
while( --nLine )
{
if( ! hb_mlGetLine( &MLC ) )
break;
}
if( nCol && nLine == 0 )
{
MLC.nMaxCol = nCol;
MLC.nLineLength = nCol;
hb_mlGetLine( &MLC );
}
nOffset = MLC.nOffset;
if( MLC.cdp )
nOffset = hb_cdpTextLen( MLC.cdp, MLC.pszString, nOffset );
}
hb_mlExit( &MLC );
}
}
hb_retns( nOffset + 1 );
}
/* MPosToLC( <cString>, [ <nLineLength>=79 ],
* [ <nPos>=1 ],
* [ <nTabSize>=4 ], [ <lWrap>=.T. ],
* [ <cEOL>|<acEOLs> ] ) --> <aLineCol>
*/
HB_FUNC( MPOSTOLC )
{
HB_ISIZ nPos = hb_parns( 3 );
HB_SIZE nLine = 0;
HB_SIZE nCol = 0;
if( nPos > 0 )
{
HB_MLC_INFO MLC;
if( hb_mlInit( &MLC, 1 ) )
{
if( MLC.cdp )
{
HB_SIZE nRest = nPos;
nPos = hb_cdpTextPosEx( MLC.cdp, MLC.pszString, MLC.nLen, &nRest );
nPos += nRest;
}
MLC.nMaxPos = nPos;
if( MLC.nMaxPos <= MLC.nLen + 1 )
{
for( ;; )
{
HB_SIZE nOffset = MLC.nOffset;
hb_mlGetLine( &MLC );
nCol = MLC.nCol;
++nLine;
if( MLC.nOffset == nOffset || MLC.nOffset >= MLC.nMaxPos )
break;
}
}
hb_mlExit( &MLC );
}
}
hb_reta( 2 );
hb_storvns( nLine, -1, 1 );
hb_storvns( nCol, -1, 2 );
}
/* hb_MLEval( <cString>, <bCode>, [ <nLineLength>=79 ],
* [ <nTabSize>=4 ], [ <lWrap>=.T. ],
* [ <nPos> ], [ @<nRow> ], [ @<nCol> ] ) --> <nLines>
*/
HB_FUNC( HB_MLEVAL )
{
const char * pszString = hb_parc( 1 );
PHB_ITEM pBlock = hb_param( 2, HB_IT_EVALITEM );
HB_ISIZ nSize = hb_parnsdef( 3, 79 );
HB_SIZE nRowPos = 0, nColPos = 0, nLines = 0;
if( pszString && pBlock && nSize > 0 )
{
HB_SIZE nOffset = 0;
HB_SIZE nLineLength = nSize;
HB_SIZE nLen = hb_parclen( 1 );
HB_SIZE nTabSize = hb_parnsdef( 4, 4 );
HB_SIZE nPos = hb_parns( 6 ) - 1;
HB_BOOL fWordWrap = hb_parldef( 5, HB_TRUE );
PHB_CODEPAGE cdp = hb_vmCDP();
PHB_ITEM pLineItem = NULL, pSoftItem = NULL;
HB_BOOL fSoftCR, fEOL;
char * pszLine;
if( ! HB_CDP_ISCHARIDX( cdp ) )
cdp = NULL;
#ifdef HB_CLP_STRICT
if( nLineLength > 254 )
nLineLength = 79;
#else
if( nLineLength > 0xFFFF )
nLineLength = 0xFFFF;
#endif
if( nTabSize >= nLineLength )
nTabSize = nLineLength - 1;
if( nTabSize == 0 )
nTabSize = 1;
pszLine = ( char * ) hb_xgrab( nLineLength + 1 );
do
{
HB_SIZE nBlankCol = 0, nBlankPos = 0, nBlankDst = 0, nCol = 0, nDst = 0;
fSoftCR = fEOL = HB_FALSE;
++nLines;
while( ! fSoftCR && nOffset < nLen )
{
HB_SIZE nRepl;
HB_WCHAR ch;
if( pszString[ nOffset ] == HB_CHAR_SOFT1 &&
pszString[ nOffset + 1 ] == HB_CHAR_SOFT2 )
{
nOffset += 2;
if( fWordWrap )
continue;
break;
}
else if( pszString[ nOffset ] == HB_CHAR_CR )
{
++nOffset;
if( pszString[ nOffset ] == HB_CHAR_LF )
++nOffset;
fEOL = HB_TRUE;
break;
}
else if( pszString[ nOffset ] == HB_CHAR_LF )
{
++nOffset;
if( pszString[ nOffset ] == HB_CHAR_CR )
++nOffset;
fEOL = HB_TRUE;
break;
}
if( cdp )
{
if( ! HB_CDPCHAR_GET( cdp, pszString, nLen, &nOffset, &ch ) )
continue;
if( ! HB_CDPCHAR_PUT( cdp, pszLine, nLineLength + 1, &nDst, ch ) )
break;
}
else
ch = pszLine[ nDst++ ] = pszString[ nOffset++ ];
if( nRowPos == 0 && nOffset > nPos )
{
nRowPos = nLines;
nColPos = nCol;
}
if( ch == ' ' || ch == HB_CHAR_HT )
{
nBlankPos = nOffset;
nBlankCol = nCol;
nBlankDst = nDst;
}
nRepl = ch == HB_CHAR_HT ? nTabSize - ( nCol % nTabSize ) -1 : 0;
for( ;; )
{
if( ++nCol >= nLineLength )
{
if( fWordWrap && nBlankCol > 0 )
{
nOffset = nBlankPos;
nCol = nBlankCol;
nDst = nBlankDst;
if( nOffset <= nPos )
nRowPos = nColPos = 0;
}
fSoftCR = HB_TRUE;
break;
}
if( nRepl-- == 0 )
break;
if( !cdp )
pszLine[ nDst++ ] = ( char ) ch;
else if( ! HB_CDPCHAR_PUT( cdp, pszLine, nLineLength + 1, &nDst, ch ) )
break;
}
}
if( nRowPos == 0 && nOffset >= nPos && ! fSoftCR )
{
nRowPos = nLines;
nColPos = nCol;
}
pLineItem = hb_itemPutCL( pLineItem, pszLine, nDst );
pSoftItem = hb_itemPutL( pSoftItem, fSoftCR );
hb_vmEvalBlockV( pBlock, 2, pLineItem, pSoftItem );
}
while( nOffset < nLen && hb_vmRequestQuery() == 0 );
if( fSoftCR || fEOL )
{
++nLines;
pLineItem = hb_itemPutC( pLineItem, NULL );
pSoftItem = hb_itemPutL( pSoftItem, HB_FALSE );
hb_vmEvalBlockV( pBlock, 2, pLineItem, pSoftItem );
}
if( nRowPos == 0 && nOffset >= nPos )
{
nRowPos = nLines;
nColPos = 0;
}
hb_itemRelease( pLineItem );
hb_itemRelease( pSoftItem );
hb_xfree( pszLine );
}
if( hb_vmRequestQuery() == 0 )
{
hb_storns( nRowPos, 7 );
hb_storns( nColPos, 8 );
hb_retns( nLines );
}
}
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