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Diffstat (limited to 'basic/source/comp/buffer.cxx')
| -rw-r--r-- | basic/source/comp/buffer.cxx | 250 |
1 files changed, 250 insertions, 0 deletions
diff --git a/basic/source/comp/buffer.cxx b/basic/source/comp/buffer.cxx new file mode 100644 index 000000000000..74559bf0e6c4 --- /dev/null +++ b/basic/source/comp/buffer.cxx @@ -0,0 +1,250 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2000, 2010 Oracle and/or its affiliates. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * This file is part of OpenOffice.org. + * + * OpenOffice.org is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 3 + * only, as published by the Free Software Foundation. + * + * OpenOffice.org 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 version 3 for more details + * (a copy is included in the LICENSE file that accompanied this code). + * + * You should have received a copy of the GNU Lesser General Public License + * version 3 along with OpenOffice.org. If not, see + * <http://www.openoffice.org/license.html> + * for a copy of the LGPLv3 License. + * + ************************************************************************/ + +// MARKER(update_precomp.py): autogen include statement, do not remove +#include "precompiled_basic.hxx" + +#include "sbcomp.hxx" +#include "buffer.hxx" +#include <string.h> + +const static UINT32 UP_LIMIT=0xFFFFFF00L; + +// 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( ( static_cast<UINT32>( nOff )+ n ) > static_cast<UINT32>( nSize ) ) + { + if( nInc == 0 ) + return FALSE; + USHORT nn = 0; + while( nn < n ) nn = nn + nInc; + char* p; + if( ( static_cast<UINT32>( nSize ) + nn ) > UP_LIMIT ) 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 = nSize + nn; + } + } + return TRUE; +} + +// Angleich des Puffers auf die uebergebene Byte-Grenze + +void SbiBuffer::Align( INT32 n ) +{ + if( nOff % n ) { + UINT32 nn =( ( nOff + n ) / n ) * n; + if( nn <= UP_LIMIT ) + { + nn = nn - nOff; + if( Check( static_cast<USHORT>(nn) ) ) + { + memset( pCur, 0, nn ); + pCur += nn; + nOff = nOff + nn; + } + } + } +} + +// Patch einer Location + +void SbiBuffer::Patch( UINT32 off, UINT32 val ) +{ + if( ( off + sizeof( UINT32 ) ) < nOff ) + { + UINT16 val1 = static_cast<UINT16>( val & 0xFFFF ); + UINT16 val2 = static_cast<UINT16>( val >> 16 ); + BYTE* p = (BYTE*) pBuf + off; + *p++ = (char) ( val1 & 0xFF ); + *p++ = (char) ( val1 >> 8 ); + *p++ = (char) ( val2 & 0xFF ); + *p = (char) ( val2 >> 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( UINT32 off ) +{ + if( off && pBuf ) + { + BYTE *ip; + UINT32 i = off; + UINT32 val1 = (nOff & 0xFFFF); + UINT32 val2 = (nOff >> 16); + do + { + ip = (BYTE*) pBuf + i; + BYTE* pTmp = ip; + i = *pTmp++; i |= *pTmp++ << 8; i |= *pTmp++ << 16; i |= *pTmp++ << 24; + + if( i >= nOff ) + { + pParser->Error( SbERR_INTERNAL_ERROR, "BACKCHAIN" ); + break; + } + *ip++ = (char) ( val1 & 0xFF ); + *ip++ = (char) ( val1 >> 8 ); + *ip++ = (char) ( val2 & 0xFF ); + *ip = (char) ( val2 >> 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 +=( UINT32 n ) +{ + if( Check( 4 ) ) + { + UINT16 n1 = static_cast<UINT16>( n & 0xFFFF ); + UINT16 n2 = static_cast<UINT16>( n >> 16 ); + if ( operator +=( n1 ) && operator +=( n2 ) ) + return TRUE; + return TRUE; + } + return FALSE; +} + +BOOL SbiBuffer::operator +=( INT32 n ) +{ + return operator +=( (UINT32) n ); +} + + +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 = 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 = nOff + len; + return TRUE; + } else return FALSE; +} + + + |