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Diffstat (limited to 'basic/source/comp/buffer.cxx')
| -rw-r--r-- | basic/source/comp/buffer.cxx | 253 |
1 files changed, 253 insertions, 0 deletions
diff --git a/basic/source/comp/buffer.cxx b/basic/source/comp/buffer.cxx new file mode 100644 index 000000000000..7fc27bb233cc --- /dev/null +++ b/basic/source/comp/buffer.cxx @@ -0,0 +1,253 @@ +/************************************************************************* + * + * $RCSfile: buffer.cxx,v $ + * + * $Revision: 1.1.1.1 $ + * + * last change: $Author: hr $ $Date: 2000-09-18 16:12:10 $ + * + * The Contents of this file are made available subject to the terms of + * either of the following licenses + * + * - GNU Lesser General Public License Version 2.1 + * - Sun Industry Standards Source License Version 1.1 + * + * Sun Microsystems Inc., October, 2000 + * + * GNU Lesser General Public License Version 2.1 + * ============================================= + * Copyright 2000 by Sun Microsystems, Inc. + * 901 San Antonio Road, Palo Alto, CA 94303, USA + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License version 2.1, as published by the Free Software Foundation. + * + * This library 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, + * MA 02111-1307 USA + * + * + * Sun Industry Standards Source License Version 1.1 + * ================================================= + * The contents of this file are subject to the Sun Industry Standards + * Source License Version 1.1 (the "License"); You may not use this file + * except in compliance with the License. You may obtain a copy of the + * License at http://www.openoffice.org/license.html. + * + * Software provided under this License is provided on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, + * WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS, + * MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING. + * See the License for the specific provisions governing your rights and + * obligations concerning the Software. + * + * The Initial Developer of the Original Code is: Sun Microsystems, Inc. + * + * Copyright: 2000 by Sun Microsystems, Inc. + * + * All Rights Reserved. + * + * Contributor(s): _______________________________________ + * + * + ************************************************************************/ + +#include "sbcomp.hxx" +#pragma hdrstop +#include "buffer.hxx" +#include <string.h> + +#include "segmentc.hxx" +#pragma SW_SEGMENT_CLASS( SBCOMP, SBCOMP_CODE ) + +// Der SbiBuffer wird in Inkrements von mindestens 16 Bytes erweitert. +// Dies ist notwendig, da viele Klassen von einer Pufferlaenge +// von x*16 Bytes ausgehen. + +SbiBuffer::SbiBuffer( SbiParser* p, short n ) +{ + pParser = p; + n = ( (n + 15 ) / 16 ) * 16; + if( !n ) n = 16; + pBuf = NULL; + pCur = NULL; + nInc = n; + nSize = + nOff = 0; +} + +SbiBuffer::~SbiBuffer() +{ + delete pBuf; +} + +// Rausreichen des Puffers +// Dies fuehrt zur Loeschung des Puffers! + +char* SbiBuffer::GetBuffer() +{ + char* p = pBuf; + pBuf = NULL; + pCur = NULL; + return p; +} + +// Test, ob der Puffer n Bytes aufnehmen kann. +// Im Zweifelsfall wird er vergroessert + +BOOL SbiBuffer::Check( USHORT n ) +{ + if( !n ) return TRUE; + if( ((long) nOff + n ) > (long) nSize ) + { + USHORT nn = 0; + while( nn < n ) nn += nInc; + char* p; + if( ((long) nSize + nn ) > 0xFF00L ) p = NULL; + else p = new char [nSize + nn]; + if( !p ) + { + pParser->Error( SbERR_PROG_TOO_LARGE ); + nInc = 0; + delete pBuf; pBuf = NULL; + return FALSE; + } + else + { + if( nSize ) memcpy( p, pBuf, nSize ); + delete pBuf; + pBuf = p; + pCur = pBuf + nOff; + nSize += nn; + } + } + return TRUE; +} + +// Angleich des Puffers auf die uebergebene Byte-Grenze + +void SbiBuffer::Align( short n ) +{ + if( nOff % n ) { + USHORT nn =( ( nOff + n ) / n ) * n; + if( nn <= 0xFF00 ) + { + nn -= nOff; + if( Check( nn ) ) + { + memset( pCur, 0, nn ); + pCur += nn; + nOff += nn; + } + } + } +} + +// Patch einer Location + +void SbiBuffer::Patch( USHORT off, UINT16 val ) +{ + if( ( off + sizeof( UINT16 ) ) < nOff ) + { + BYTE* p = (BYTE*) pBuf + off; + *p++ = (char) ( val & 0xFF ); + *p = (char) ( val >> 8 ); + } +} + +// Forward References auf Labels und Prozeduren +// bauen eine Kette auf. Der Anfang der Kette ist beim uebergebenen +// Parameter, das Ende der Kette ist 0. + +void SbiBuffer::Chain( USHORT off ) +{ + if( off && pBuf ) + { + BYTE *ip; + USHORT i = off; + USHORT val = nOff; + do + { + ip = (BYTE*) pBuf + i; + i = ( *ip ) | ( *(ip+1) << 8 ); + if( i >= nOff ) + { + pParser->Error( SbERR_INTERNAL_ERROR, "BACKCHAIN" ); + break; + } + *ip++ = (char) ( val & 0xFF ); + *ip = (char) ( val >> 8 ); + } while( i ); + } +} + +BOOL SbiBuffer::operator +=( INT8 n ) +{ + if( Check( 1 ) ) + { + *pCur++ = (char) n; nOff++; return TRUE; + } else return FALSE; +} + +BOOL SbiBuffer::operator +=( UINT8 n ) +{ + if( Check( 1 ) ) + { + *pCur++ = (char) n; nOff++; return TRUE; + } else return FALSE; +} + +BOOL SbiBuffer::operator +=( INT16 n ) +{ + if( Check( 2 ) ) + { + *pCur++ = (char) ( n & 0xFF ); + *pCur++ = (char) ( n >> 8 ); + nOff += 2; return TRUE; + } else return FALSE; +} + +BOOL SbiBuffer::operator +=( UINT16 n ) +{ + if( Check( 2 ) ) + { + *pCur++ = (char) ( n & 0xFF ); + *pCur++ = (char) ( n >> 8 ); + nOff += 2; return TRUE; + } else return FALSE; +} + +BOOL SbiBuffer::operator +=( const String& n ) +{ + USHORT l = n.Len() + 1; + if( Check( l ) ) + { + ByteString aByteStr( n, gsl_getSystemTextEncoding() ); + memcpy( pCur, aByteStr.GetBuffer(), l ); + pCur += l; + nOff += l; + return TRUE; + } + else return FALSE; +} + +BOOL SbiBuffer::Add( const void* p, USHORT len ) +{ + if( Check( len ) ) + { + memcpy( pCur, p, len ); + pCur += len; + nOff += len; + return TRUE; + } else return FALSE; +} + + + |