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Diffstat (limited to 'basic/source/sbx/sbxexec.cxx')
| -rw-r--r-- | basic/source/sbx/sbxexec.cxx | 381 |
1 files changed, 381 insertions, 0 deletions
diff --git a/basic/source/sbx/sbxexec.cxx b/basic/source/sbx/sbxexec.cxx new file mode 100644 index 000000000..d830061f0 --- /dev/null +++ b/basic/source/sbx/sbxexec.cxx @@ -0,0 +1,381 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 . + */ + +#include <basic/sbx.hxx> +#include <basic/sberrors.hxx> +#include <rtl/character.hxx> +#include <rtl/ustrbuf.hxx> + + +static SbxVariableRef Element + ( SbxObject* pObj, SbxObject* pGbl, const sal_Unicode** ppBuf, + SbxClassType ); + +static const sal_Unicode* SkipWhitespace( const sal_Unicode* p ) +{ + while( *p && ( *p == ' ' || *p == '\t' ) ) + p++; + return p; +} + +// Scanning of a symbol. The symbol were inserted in rSym, the return value +// is the new scan position. The symbol is at errors empty. + +static const sal_Unicode* Symbol( const sal_Unicode* p, OUString& rSym ) +{ + sal_uInt16 nLen = 0; + // Did we have a nonstandard symbol? + if( *p == '[' ) + { + rSym = ++p; + while( *p && *p != ']' ) + { + p++; + nLen++; + } + p++; + } + else + { + // A symbol had to begin with an alphabetic character or an underline + if( !rtl::isAsciiAlpha( *p ) && *p != '_' ) + { + SbxBase::SetError( ERRCODE_BASIC_SYNTAX ); + } + else + { + rSym = p; + // The it can contain alphabetic characters, numbers or underlines + while( *p && (rtl::isAsciiAlphanumeric( *p ) || *p == '_') ) + { + p++; + nLen++; + } + // Ignore standard BASIC suffixes + if( *p && (*p == '%' || *p == '&' || *p == '!' || *p == '#' || *p == '$' ) ) + { + p++; + } + } + } + rSym = rSym.copy( 0, nLen ); + return p; +} + +// Qualified name. Element.Element... + +static SbxVariableRef QualifiedName + ( SbxObject* pObj, SbxObject* pGbl, const sal_Unicode** ppBuf, SbxClassType t ) +{ + + SbxVariableRef refVar; + const sal_Unicode* p = SkipWhitespace( *ppBuf ); + if( rtl::isAsciiAlpha( *p ) || *p == '_' || *p == '[' ) + { + // Read in the element + refVar = Element( pObj, pGbl, &p, t ); + while( refVar.is() && (*p == '.' || *p == '!') ) + { + // It follows still an objectelement. The current element + // had to be a SBX-Object or had to deliver such an object! + pObj = dynamic_cast<SbxObject*>( refVar.get() ); + if( !pObj ) + // Then it had to deliver an object + pObj = dynamic_cast<SbxObject*>( refVar->GetObject() ); + refVar.clear(); + if( !pObj ) + break; + p++; + // And the next element please + refVar = Element( pObj, pGbl, &p, t ); + } + } + else + SbxBase::SetError( ERRCODE_BASIC_SYNTAX ); + *ppBuf = p; + return refVar; +} + +// Read in of an operand. This could be a number, a string or +// a function (with optional parameters). + +static SbxVariableRef Operand + ( SbxObject* pObj, SbxObject* pGbl, const sal_Unicode** ppBuf, bool bVar ) +{ + SbxVariableRef refVar( new SbxVariable ); + const sal_Unicode* p = SkipWhitespace( *ppBuf ); + if( !bVar && ( rtl::isAsciiDigit( *p ) + || ( *p == '.' && rtl::isAsciiDigit( *( p+1 ) ) ) + || *p == '-' + || *p == '&' ) ) + { + // A number could be scanned in directly! + sal_uInt16 nLen; + if( !refVar->Scan( OUString( p ), &nLen ) ) + { + refVar.clear(); + } + else + { + p += nLen; + } + } + else if( !bVar && *p == '"' ) + { + // A string + OUStringBuffer aString; + p++; + for( ;; ) + { + // This is perhaps an error + if( !*p ) + { + return nullptr; + } + // Double quotes are OK + if( *p == '"' && (*++p) != '"' ) + { + break; + } + aString.append(*p++); + } + refVar->PutString( aString.makeStringAndClear() ); + } + else + { + refVar = QualifiedName( pObj, pGbl, &p, SbxClassType::DontCare ); + } + *ppBuf = p; + return refVar; +} + +// Read in of a simple term. The operands +, -, * and / +// are supported. + +static SbxVariableRef MulDiv( SbxObject* pObj, SbxObject* pGbl, const sal_Unicode** ppBuf ) +{ + const sal_Unicode* p = *ppBuf; + SbxVariableRef refVar( Operand( pObj, pGbl, &p, false ) ); + p = SkipWhitespace( p ); + while( refVar.is() && ( *p == '*' || *p == '/' ) ) + { + sal_Unicode cOp = *p++; + SbxVariableRef refVar2( Operand( pObj, pGbl, &p, false ) ); + if( refVar2.is() ) + { + // temporary variable! + SbxVariable* pVar = refVar.get(); + pVar = new SbxVariable( *pVar ); + refVar = pVar; + if( cOp == '*' ) + *refVar *= *refVar2; + else + *refVar /= *refVar2; + } + else + { + refVar.clear(); + break; + } + } + *ppBuf = p; + return refVar; +} + +static SbxVariableRef PlusMinus( SbxObject* pObj, SbxObject* pGbl, const sal_Unicode** ppBuf ) +{ + const sal_Unicode* p = *ppBuf; + SbxVariableRef refVar( MulDiv( pObj, pGbl, &p ) ); + p = SkipWhitespace( p ); + while( refVar.is() && ( *p == '+' || *p == '-' ) ) + { + sal_Unicode cOp = *p++; + SbxVariableRef refVar2( MulDiv( pObj, pGbl, &p ) ); + if( refVar2.is() ) + { + // temporary Variable! + SbxVariable* pVar = refVar.get(); + pVar = new SbxVariable( *pVar ); + refVar = pVar; + if( cOp == '+' ) + *refVar += *refVar2; + else + *refVar -= *refVar2; + } + else + { + refVar.clear(); + break; + } + } + *ppBuf = p; + return refVar; +} + +static SbxVariableRef Assign( SbxObject* pObj, SbxObject* pGbl, const sal_Unicode** ppBuf ) +{ + const sal_Unicode* p = *ppBuf; + SbxVariableRef refVar( Operand( pObj, pGbl, &p, true ) ); + p = SkipWhitespace( p ); + if( refVar.is() ) + { + if( *p == '=' ) + { + // Assign only onto properties! + if( refVar->GetClass() != SbxClassType::Property ) + { + SbxBase::SetError( ERRCODE_BASIC_BAD_ACTION ); + refVar.clear(); + } + else + { + p++; + SbxVariableRef refVar2( PlusMinus( pObj, pGbl, &p ) ); + if( refVar2.is() ) + { + SbxVariable* pVar = refVar.get(); + SbxVariable* pVar2 = refVar2.get(); + *pVar = *pVar2; + pVar->SetParameters( nullptr ); + } + } + } + else + // Simple call: once activating + refVar->Broadcast( SfxHintId::BasicDataWanted ); + } + *ppBuf = p; + return refVar; +} + +// Read in of an element. This is a symbol, optional followed +// by a parameter list. The symbol will be searched in the +// specified object and the parameter list will be attached if necessary. + +static SbxVariableRef Element + ( SbxObject* pObj, SbxObject* pGbl, const sal_Unicode** ppBuf, + SbxClassType t ) +{ + OUString aSym; + const sal_Unicode* p = Symbol( *ppBuf, aSym ); + SbxVariableRef refVar; + if( !aSym.isEmpty() ) + { + SbxFlagBits nOld = pObj->GetFlags(); + if( pObj == pGbl ) + { + pObj->SetFlag( SbxFlagBits::GlobalSearch ); + } + refVar = pObj->Find( aSym, t ); + pObj->SetFlags( nOld ); + if( refVar.is() ) + { + refVar->SetParameters( nullptr ); + // Follow still parameter? + p = SkipWhitespace( p ); + if( *p == '(' ) + { + p++; + auto refPar = tools::make_ref<SbxArray>(); + sal_uInt32 nArg = 0; + // We are once relaxed and accept as well + // the line- or command end as delimiter + // Search parameter always global! + while( *p && *p != ')' && *p != ']' ) + { + SbxVariableRef refArg = PlusMinus( pGbl, pGbl, &p ); + if( !refArg.is() ) + { + // Error during the parsing + refVar.clear(); break; + } + else + { + // One copies the parameter, so that + // one have the current status (triggers also + // the call per access) + refPar->Put(new SbxVariable(*refArg), ++nArg); + } + p = SkipWhitespace( p ); + if( *p == ',' ) + p++; + } + if( *p == ')' ) + p++; + if( refVar.is() ) + refVar->SetParameters( refPar.get() ); + } + } + else + SbxBase::SetError( ERRCODE_BASIC_NO_METHOD ); + } + *ppBuf = p; + return refVar; +} + +// Mainroutine + +SbxVariable* SbxObject::Execute( const OUString& rTxt ) +{ + SbxVariableRef pVar; + const sal_Unicode* p = rTxt.getStr(); + for( ;; ) + { + p = SkipWhitespace( p ); + if( !*p ) + { + break; + } + if( *p++ != '[' ) + { + SetError( ERRCODE_BASIC_SYNTAX ); break; + } + pVar = Assign( this, this, &p ); + if( !pVar.is() ) + { + break; + } + p = SkipWhitespace( p ); + if( *p++ != ']' ) + { + SetError( ERRCODE_BASIC_SYNTAX ); break; + } + } + return pVar.get(); +} + +SbxVariable* SbxObject::FindQualified( const OUString& rName, SbxClassType t ) +{ + SbxVariableRef pVar; + const sal_Unicode* p = rName.getStr(); + p = SkipWhitespace( p ); + if( !*p ) + { + return nullptr; + } + pVar = QualifiedName( this, this, &p, t ); + p = SkipWhitespace( p ); + if( *p ) + { + SetError( ERRCODE_BASIC_SYNTAX ); + } + return pVar.get(); +} + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |