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Diffstat (limited to 'basic/source/comp/buffer.cxx')
| -rw-r--r-- | basic/source/comp/buffer.cxx | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/basic/source/comp/buffer.cxx b/basic/source/comp/buffer.cxx new file mode 100644 index 000000000000..2e0fb542d3c2 --- /dev/null +++ b/basic/source/comp/buffer.cxx @@ -0,0 +1,252 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/************************************************************************* + * + * 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 sal_uInt32 UP_LIMIT=0xFFFFFF00L; + +// The SbiBuffer will be expanded in increments of at least 16 Bytes. +// This is necessary, because many classes emanate from a buffer length +// of x*16 Bytes. + +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; +} + +// Reach out the buffer +// This lead to the deletion of the buffer! + +char* SbiBuffer::GetBuffer() +{ + char* p = pBuf; + pBuf = NULL; + pCur = NULL; + return p; +} + +// Test, if the buffer can contain n Bytes. +// In case of doubt it will be enlarged + +sal_Bool SbiBuffer::Check( sal_uInt16 n ) +{ + if( !n ) return sal_True; + if( ( static_cast<sal_uInt32>( nOff )+ n ) > static_cast<sal_uInt32>( nSize ) ) + { + if( nInc == 0 ) + return sal_False; + sal_uInt16 nn = 0; + while( nn < n ) nn = nn + nInc; + char* p; + if( ( static_cast<sal_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 sal_False; + } + else + { + if( nSize ) memcpy( p, pBuf, nSize ); + delete[] pBuf; + pBuf = p; + pCur = pBuf + nOff; + nSize = nSize + nn; + } + } + return sal_True; +} + +// Conditioning of the buffer onto the passed Byte limit + +void SbiBuffer::Align( sal_Int32 n ) +{ + if( nOff % n ) { + sal_uInt32 nn =( ( nOff + n ) / n ) * n; + if( nn <= UP_LIMIT ) + { + nn = nn - nOff; + if( Check( static_cast<sal_uInt16>(nn) ) ) + { + memset( pCur, 0, nn ); + pCur += nn; + nOff = nOff + nn; + } + } + } +} + +// Patch of a Location + +void SbiBuffer::Patch( sal_uInt32 off, sal_uInt32 val ) +{ + if( ( off + sizeof( sal_uInt32 ) ) < nOff ) + { + sal_uInt16 val1 = static_cast<sal_uInt16>( val & 0xFFFF ); + sal_uInt16 val2 = static_cast<sal_uInt16>( val >> 16 ); + sal_uInt8* p = (sal_uInt8*) pBuf + off; + *p++ = (char) ( val1 & 0xFF ); + *p++ = (char) ( val1 >> 8 ); + *p++ = (char) ( val2 & 0xFF ); + *p = (char) ( val2 >> 8 ); + } +} + +// Forward References upon label und procedures +// establish a linkage. The beginning of the linkage is at the passed parameter, +// the end of the linkage is 0. + +void SbiBuffer::Chain( sal_uInt32 off ) +{ + if( off && pBuf ) + { + sal_uInt8 *ip; + sal_uInt32 i = off; + sal_uInt32 val1 = (nOff & 0xFFFF); + sal_uInt32 val2 = (nOff >> 16); + do + { + ip = (sal_uInt8*) pBuf + i; + sal_uInt8* 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 ); + } +} + +sal_Bool SbiBuffer::operator +=( sal_Int8 n ) +{ + if( Check( 1 ) ) + { + *pCur++ = (char) n; nOff++; return sal_True; + } else return sal_False; +} + +sal_Bool SbiBuffer::operator +=( sal_uInt8 n ) +{ + if( Check( 1 ) ) + { + *pCur++ = (char) n; nOff++; return sal_True; + } else return sal_False; +} + +sal_Bool SbiBuffer::operator +=( sal_Int16 n ) +{ + if( Check( 2 ) ) + { + *pCur++ = (char) ( n & 0xFF ); + *pCur++ = (char) ( n >> 8 ); + nOff += 2; return sal_True; + } else return sal_False; +} + +sal_Bool SbiBuffer::operator +=( sal_uInt16 n ) +{ + if( Check( 2 ) ) + { + *pCur++ = (char) ( n & 0xFF ); + *pCur++ = (char) ( n >> 8 ); + nOff += 2; return sal_True; + } else return sal_False; +} + +sal_Bool SbiBuffer::operator +=( sal_uInt32 n ) +{ + if( Check( 4 ) ) + { + sal_uInt16 n1 = static_cast<sal_uInt16>( n & 0xFFFF ); + sal_uInt16 n2 = static_cast<sal_uInt16>( n >> 16 ); + if ( operator +=( n1 ) && operator +=( n2 ) ) + return sal_True; + return sal_True; + } + return sal_False; +} + +sal_Bool SbiBuffer::operator +=( sal_Int32 n ) +{ + return operator +=( (sal_uInt32) n ); +} + + +sal_Bool SbiBuffer::operator +=( const String& n ) +{ + sal_uInt16 l = n.Len() + 1; + if( Check( l ) ) + { + ByteString aByteStr( n, gsl_getSystemTextEncoding() ); + memcpy( pCur, aByteStr.GetBuffer(), l ); + pCur += l; + nOff = nOff + l; + return sal_True; + } + else return sal_False; +} + +sal_Bool SbiBuffer::Add( const void* p, sal_uInt16 len ) +{ + if( Check( len ) ) + { + memcpy( pCur, p, len ); + pCur += len; + nOff = nOff + len; + return sal_True; + } else return sal_False; +} + + + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |