740 lines
22 KiB
C++
740 lines
22 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#include <basiccharclass.hxx>
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#include <scanner.hxx>
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#include <sbintern.hxx>
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#include <runtime.hxx>
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#include <basic/sberrors.hxx>
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#include <i18nlangtag/lang.h>
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#include <svl/numformat.hxx>
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#include <svl/zforlist.hxx>
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#include <rtl/character.hxx>
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#include <o3tl/string_view.hxx>
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#include <utility>
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#include <vector>
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SbiScanner::SbiScanner(OUString _aBuf, StarBASIC* p)
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: aBuf(std::move(_aBuf))
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, nLineIdx(-1)
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, nSaveLineIdx(-1)
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, pBasic(p)
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, eScanType(SbxVARIANT)
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, nVal(0)
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, nSavedCol1(0)
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, nCol(0)
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, nErrors(0)
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, nColLock(0)
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, nBufPos(0)
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, nLine(0)
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, nCol1(0)
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, nCol2(0)
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, bSymbol(false)
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, bNumber(false)
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, bSpaces(false)
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, bAbort(false)
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, bHash(true)
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, bError(false)
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, bCompatible(false)
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, bVBASupportOn(false)
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, bPrevLineExtentsComment(false)
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, bClosingUnderscore(false)
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, bLineEndsWithWhitespace(false)
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, bInStatement(false)
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{
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}
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void SbiScanner::LockColumn()
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{
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if( !nColLock++ )
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nSavedCol1 = nCol1;
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}
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void SbiScanner::UnlockColumn()
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{
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if( nColLock )
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nColLock--;
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}
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void SbiScanner::GenError( ErrCode code )
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{
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if( GetSbData()->bBlockCompilerError )
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{
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bAbort = true;
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return;
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}
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if( !bError )
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{
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bool bRes = true;
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// report only one error per statement
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bError = true;
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if( pBasic )
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{
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// in case of EXPECTED or UNEXPECTED it always refers
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// to the last token, so take the Col1 over
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sal_Int32 nc = nColLock ? nSavedCol1 : nCol1;
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if ( code.anyOf(
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ERRCODE_BASIC_EXPECTED,
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ERRCODE_BASIC_UNEXPECTED,
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ERRCODE_BASIC_SYMBOL_EXPECTED,
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ERRCODE_BASIC_LABEL_EXPECTED) )
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{
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nc = nCol1;
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if( nc > nCol2 ) nCol2 = nc;
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}
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bRes = pBasic->CError( code, aError, nLine, nc, nCol2 );
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}
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bAbort = bAbort || !bRes || ( code == ERRCODE_BASIC_NO_MEMORY || code == ERRCODE_BASIC_PROG_TOO_LARGE );
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}
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nErrors++;
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}
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// used by SbiTokenizer::MayBeLabel() to detect a label
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bool SbiScanner::DoesColonFollow()
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{
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if(nCol < aLine.getLength() && aLine[nCol] == ':')
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{
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++nLineIdx; ++nCol;
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return true;
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}
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else
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return false;
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}
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// test for legal suffix
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static SbxDataType GetSuffixType( sal_Unicode c )
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{
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switch (c)
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{
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case '%':
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return SbxINTEGER;
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case '&':
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return SbxLONG;
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case '!':
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return SbxSINGLE;
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case '#':
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return SbxDOUBLE;
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case '@':
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return SbxCURRENCY;
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case '$':
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return SbxSTRING;
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default:
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return SbxVARIANT;
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}
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}
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// reading the next symbol into the variables aSym, nVal and eType
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// return value is sal_False at EOF or errors
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#define BUF_SIZE 80
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void SbiScanner::scanAlphanumeric()
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{
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sal_Int32 n = nCol;
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while(nCol < aLine.getLength() && (BasicCharClass::isAlphaNumeric(aLine[nCol], bCompatible) || aLine[nCol] == '_'))
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{
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++nLineIdx;
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++nCol;
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}
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aSym = aLine.copy(n, nCol - n);
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}
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void SbiScanner::scanGoto()
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{
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sal_Int32 n = nCol;
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while(n < aLine.getLength() && BasicCharClass::isWhitespace(aLine[n]))
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++n;
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if(n + 1 < aLine.getLength())
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{
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std::u16string_view aTemp = aLine.subView(n, 2);
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if(o3tl::equalsIgnoreAsciiCase(aTemp, u"to"))
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{
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aSym = "goto";
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nLineIdx += n + 2 - nCol;
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nCol = n + 2;
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}
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}
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}
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bool SbiScanner::readLine()
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{
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if(nBufPos >= aBuf.getLength())
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return false;
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sal_Int32 n = nBufPos;
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sal_Int32 nLen = aBuf.getLength();
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while(n < nLen && aBuf[n] != '\r' && aBuf[n] != '\n')
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++n;
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// Trim trailing whitespace
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sal_Int32 nEnd = n;
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while(nBufPos < nEnd && BasicCharClass::isWhitespace(aBuf[nEnd - 1]))
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--nEnd;
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// tdf#149402 - check if line ends with a whitespace
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bLineEndsWithWhitespace = (n > nEnd);
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aLine = aBuf.copy(nBufPos, nEnd - nBufPos);
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// Fast-forward past the line ending
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if(n + 1 < nLen && aBuf[n] == '\r' && aBuf[n + 1] == '\n')
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n += 2;
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else if(n < nLen)
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++n;
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nBufPos = n;
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nLineIdx = 0;
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++nLine;
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nCol = nCol1 = nCol2 = 0;
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nColLock = 0;
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return true;
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}
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// Function to check if a string is a valid compiler directive
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static bool isValidCompilerDirective(std::u16string_view directive) {
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static const std::vector<std::u16string_view> validDirectives = {
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u"if", u"elseif", u"else", u"end", u"const"
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};
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return std::any_of(validDirectives.begin(), validDirectives.end(), [&](const auto& valid) {
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return o3tl::matchIgnoreAsciiCase(directive, valid);
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});
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}
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bool SbiScanner::NextSym()
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{
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// memorize for the EOLN-case
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sal_Int32 nOldLine = nLine;
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sal_Int32 nOldCol1 = nCol1;
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sal_Int32 nOldCol2 = nCol2;
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sal_Unicode buf[ BUF_SIZE ], *p = buf;
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eScanType = SbxVARIANT;
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aSym.clear();
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bHash = bSymbol = bNumber = bSpaces = false;
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// read in line?
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if (nLineIdx == -1)
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{
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if(!readLine())
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return false;
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nOldLine = nLine;
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nOldCol1 = nOldCol2 = 0;
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}
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const sal_Int32 nLineIdxScanStart = nLineIdx;
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if(nCol < aLine.getLength() && BasicCharClass::isWhitespace(aLine[nCol]))
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{
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bSpaces = true;
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while(nCol < aLine.getLength() && BasicCharClass::isWhitespace(aLine[nCol]))
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{
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++nLineIdx;
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++nCol;
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}
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}
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nCol1 = nCol;
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// only blank line?
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if(nCol >= aLine.getLength())
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goto eoln;
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if( bPrevLineExtentsComment )
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goto PrevLineCommentLbl;
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if(nCol < aLine.getLength() && aLine[nCol] == '#')
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{
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sal_Int32 nLineTempIdx = nLineIdx;
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std::u16string_view candidate(aLine.subView(nCol + 1));
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do
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{
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nLineTempIdx++;
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} while (nLineTempIdx < aLine.getLength() && !BasicCharClass::isWhitespace(aLine[nLineTempIdx])
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&& aLine[nLineTempIdx] != '#' && aLine[nLineTempIdx] != ',');
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// leave it if it is a date literal - it will be handled later
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if (nLineTempIdx >= aLine.getLength() || aLine[nLineTempIdx] != '#')
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{
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++nLineIdx;
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++nCol;
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//handle compiler directives (# is first non-space character)
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if (nOldCol2 == 0)
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{
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if (isValidCompilerDirective(candidate))
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{
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// Skip the whole line if starts with a hash and is a valid compiler directive
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nCol = 0;
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goto eoln;
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}
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else
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{
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GenError(ERRCODE_BASIC_SYNTAX);
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}
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}
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else
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bHash = true;
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}
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}
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// copy character if symbol
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if(nCol < aLine.getLength() && (BasicCharClass::isAlpha(aLine[nCol], bCompatible) || aLine[nCol] == '_'))
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{
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// if there's nothing behind '_' , it's the end of a line!
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if(nCol + 1 == aLine.getLength() && aLine[nCol] == '_')
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{
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// Note that nCol is not incremented here...
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++nLineIdx;
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goto eoln;
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}
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bSymbol = true;
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scanAlphanumeric();
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// Special handling for "go to"
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if(nCol < aLine.getLength() && bCompatible && aSym.equalsIgnoreAsciiCase("go"))
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scanGoto();
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// tdf#125637 - check for closing underscore
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if (nCol == aLine.getLength() && aLine[nCol - 1] == '_')
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{
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bClosingUnderscore = true;
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}
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// type recognition?
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// don't test the exclamation mark
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// if there's a symbol behind it
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else if((nCol >= aLine.getLength() || aLine[nCol] != '!') ||
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(nCol + 1 >= aLine.getLength() || !BasicCharClass::isAlpha(aLine[nCol + 1], bCompatible)))
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{
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if(nCol < aLine.getLength())
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{
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SbxDataType t(GetSuffixType(aLine[nCol]));
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if( t != SbxVARIANT )
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{
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eScanType = t;
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++nLineIdx;
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++nCol;
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}
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}
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}
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}
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// read in and convert if number
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else if((nCol < aLine.getLength() && rtl::isAsciiDigit(aLine[nCol])) ||
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(nCol + 1 < aLine.getLength() && aLine[nCol] == '.' && rtl::isAsciiDigit(aLine[nCol + 1])))
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{
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short exp = 0;
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short dec = 0;
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eScanType = SbxDOUBLE;
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bool bScanError = false;
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bool bBufOverflow = false;
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// All this because of 'D' or 'd' floating point type, sigh...
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while(!bScanError && nCol < aLine.getLength() && strchr("0123456789.DEde", aLine[nCol]))
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{
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// from 4.1.1996: buffer full? -> go on scanning empty
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if( (p-buf) == (BUF_SIZE-1) )
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{
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bBufOverflow = true;
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++nLineIdx;
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++nCol;
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continue;
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}
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// point or exponent?
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if(aLine[nCol] == '.')
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{
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if( ++dec > 1 )
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bScanError = true;
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else
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*p++ = '.';
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}
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else if(strchr("DdEe", aLine[nCol]))
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{
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if (++exp > 1)
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bScanError = true;
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else
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{
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*p++ = 'E';
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if (nCol + 1 < aLine.getLength() && (aLine[nCol+1] == '+' || aLine[nCol+1] == '-'))
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{
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++nLineIdx;
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++nCol;
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if( (p-buf) == (BUF_SIZE-1) )
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{
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bBufOverflow = true;
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continue;
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}
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*p++ = aLine[nCol];
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}
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}
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}
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else
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{
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*p++ = aLine[nCol];
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}
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++nLineIdx;
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++nCol;
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}
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*p = 0;
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aSym = p; bNumber = true;
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// For bad characters, scan and parse errors generate only one error.
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ErrCode nError = ERRCODE_NONE;
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if (bScanError)
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{
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--nLineIdx;
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--nCol;
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aError = OUString( aLine[nCol]);
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nError = ERRCODE_BASIC_BAD_CHAR_IN_NUMBER;
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}
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rtl_math_ConversionStatus eStatus = rtl_math_ConversionStatus_Ok;
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const sal_Unicode* pParseEnd = buf;
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nVal = rtl_math_uStringToDouble( buf, buf+(p-buf), '.', ',', &eStatus, &pParseEnd );
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if (pParseEnd != buf+(p-buf))
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{
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// e.g. "12e" or "12e+", or with bScanError "12d"+"E".
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sal_Int32 nChars = buf+(p-buf) - pParseEnd;
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nLineIdx -= nChars;
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nCol -= nChars;
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// For bScanError, nLineIdx and nCol were already decremented, just
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// add that character to the parse end.
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if (bScanError)
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++nChars;
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// Copy error position from original string, not the buffer
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// replacement where "12dE" => "12EE".
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aError = aLine.copy( nCol, nChars);
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nError = ERRCODE_BASIC_BAD_CHAR_IN_NUMBER;
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}
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else if (eStatus != rtl_math_ConversionStatus_Ok)
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{
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// Keep the scan error and character at position, if any.
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if (!nError)
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nError = ERRCODE_BASIC_MATH_OVERFLOW;
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}
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if (nError)
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GenError( nError );
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if( !dec && !exp )
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{
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if( nVal >= SbxMININT && nVal <= SbxMAXINT )
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eScanType = SbxINTEGER;
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else if( nVal >= SbxMINLNG && nVal <= SbxMAXLNG )
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eScanType = SbxLONG;
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}
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if( bBufOverflow )
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GenError( ERRCODE_BASIC_MATH_OVERFLOW );
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// type recognition?
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if( nCol < aLine.getLength() )
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{
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SbxDataType t(GetSuffixType(aLine[nCol]));
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if( t != SbxVARIANT )
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{
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eScanType = t;
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++nLineIdx;
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++nCol;
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}
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// tdf#130476 - don't allow String trailing data type character with numbers
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if ( t == SbxSTRING )
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{
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GenError( ERRCODE_BASIC_SYNTAX );
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}
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}
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}
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// Hex/octal number? Read in and convert:
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else if(aLine.getLength() - nCol > 1 && aLine[nCol] == '&')
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{
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++nLineIdx; ++nCol;
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sal_Unicode base = 16;
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sal_Unicode xch = aLine[nCol];
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++nLineIdx; ++nCol;
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switch( rtl::toAsciiUpperCase( xch ) )
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{
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case 'O':
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base = 8;
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break;
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case 'H':
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break;
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default :
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// treated as an operator
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--nLineIdx; --nCol; nCol1 = nCol-1;
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aSym = "&";
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return true;
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}
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bNumber = true;
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// Hex literals are signed Integers ( as defined by basic
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// e.g. -2,147,483,648 through 2,147,483,647 (signed)
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sal_uInt64 lu = 0;
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bool bOverflow = false;
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while(nCol < aLine.getLength() && BasicCharClass::isAlphaNumeric(aLine[nCol], false))
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{
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sal_Unicode ch = rtl::toAsciiUpperCase(aLine[nCol]);
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++nLineIdx; ++nCol;
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if( ((base == 16 ) && rtl::isAsciiHexDigit( ch ) ) ||
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((base == 8) && rtl::isAsciiOctalDigit( ch )))
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{
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int i = ch - '0';
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if( i > 9 ) i -= 7;
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lu = ( lu * base ) + i;
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if( lu > SAL_MAX_UINT32 )
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{
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bOverflow = true;
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}
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}
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else
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{
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aError = OUString(ch);
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GenError( ERRCODE_BASIC_BAD_CHAR_IN_NUMBER );
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}
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}
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// tdf#130476 - take into account trailing data type characters
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if( nCol < aLine.getLength() )
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{
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SbxDataType t(GetSuffixType(aLine[nCol]));
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if( t != SbxVARIANT )
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{
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eScanType = t;
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++nLineIdx;
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++nCol;
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}
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// tdf#130476 - don't allow String trailing data type character with numbers
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if ( t == SbxSTRING )
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{
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GenError( ERRCODE_BASIC_SYNTAX );
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}
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}
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|
|
// tdf#130476 - take into account trailing data type characters
|
|
switch ( eScanType )
|
|
{
|
|
case SbxINTEGER:
|
|
nVal = static_cast<double>( static_cast<sal_Int16>(lu) );
|
|
if ( lu > SbxMAXUINT )
|
|
{
|
|
bOverflow = true;
|
|
}
|
|
break;
|
|
case SbxLONG: nVal = static_cast<double>( static_cast<sal_Int32>(lu) ); break;
|
|
case SbxVARIANT:
|
|
{
|
|
// tdf#62326 - If the value of the hex string without explicit type character lies within
|
|
// the range of 0x8000 (SbxMAXINT + 1) and 0xFFFF (SbxMAXUINT) inclusive, cast the value
|
|
// to 16 bit in order to get signed integers, e.g., SbxMININT through SbxMAXINT
|
|
sal_Int32 ls = (lu > SbxMAXINT && lu <= SbxMAXUINT) ? static_cast<sal_Int16>(lu) : static_cast<sal_Int32>(lu);
|
|
eScanType = ( ls >= SbxMININT && ls <= SbxMAXINT ) ? SbxINTEGER : SbxLONG;
|
|
nVal = static_cast<double>(ls);
|
|
break;
|
|
}
|
|
default:
|
|
nVal = static_cast<double>(lu);
|
|
break;
|
|
}
|
|
if( bOverflow )
|
|
GenError( ERRCODE_BASIC_MATH_OVERFLOW );
|
|
}
|
|
|
|
// Strings:
|
|
else if (nLineIdx < aLine.getLength() && (aLine[nLineIdx] == '"' || aLine[nLineIdx] == '['))
|
|
{
|
|
sal_Unicode cSep = aLine[nLineIdx];
|
|
if( cSep == '[' )
|
|
{
|
|
bSymbol = true;
|
|
cSep = ']';
|
|
}
|
|
sal_Int32 n = nCol + 1;
|
|
while (nLineIdx < aLine.getLength())
|
|
{
|
|
do
|
|
{
|
|
nLineIdx++;
|
|
nCol++;
|
|
}
|
|
while (nLineIdx < aLine.getLength() && (aLine[nLineIdx] != cSep));
|
|
if (nLineIdx < aLine.getLength() && aLine[nLineIdx] == cSep)
|
|
{
|
|
nLineIdx++; nCol++;
|
|
if (nLineIdx >= aLine.getLength() || aLine[nLineIdx] != cSep || cSep == ']')
|
|
{
|
|
// If VBA Interop then doesn't eat the [] chars
|
|
if ( cSep == ']' && bVBASupportOn )
|
|
aSym = aLine.copy( n - 1, nCol - n + 1);
|
|
else
|
|
aSym = aLine.copy( n, nCol - n - 1 );
|
|
// get out duplicate string delimiters
|
|
OUStringBuffer aSymBuf(aSym.getLength());
|
|
for ( sal_Int32 i = 0, len = aSym.getLength(); i < len; ++i )
|
|
{
|
|
aSymBuf.append( aSym[i] );
|
|
if ( aSym[i] == cSep && ( i+1 < len ) && aSym[i+1] == cSep )
|
|
++i;
|
|
}
|
|
aSym = aSymBuf.makeStringAndClear();
|
|
if( cSep != ']' )
|
|
eScanType = SbxSTRING;
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
aError = OUString(cSep);
|
|
GenError( ERRCODE_BASIC_EXPECTED );
|
|
}
|
|
}
|
|
}
|
|
|
|
// Date:
|
|
else if (nLineIdx < aLine.getLength() && aLine[nLineIdx] == '#')
|
|
{
|
|
sal_Int32 n = nCol + 1;
|
|
do
|
|
{
|
|
nLineIdx++;
|
|
nCol++;
|
|
}
|
|
while (nLineIdx < aLine.getLength() && (aLine[nLineIdx] != '#'));
|
|
if (nLineIdx < aLine.getLength() && aLine[nLineIdx] == '#')
|
|
{
|
|
nLineIdx++; nCol++;
|
|
aSym = aLine.copy( n, nCol - n - 1 );
|
|
|
|
// parse date literal
|
|
std::shared_ptr<SvNumberFormatter> pFormatter;
|
|
if (GetSbData()->pInst)
|
|
{
|
|
pFormatter = GetSbData()->pInst->GetNumberFormatter();
|
|
}
|
|
else
|
|
{
|
|
sal_uInt32 nDummy;
|
|
pFormatter = SbiInstance::PrepareNumberFormatter( nDummy, nDummy, nDummy );
|
|
}
|
|
sal_uInt32 nIndex = pFormatter->GetStandardIndex( LANGUAGE_ENGLISH_US);
|
|
bool bSuccess = pFormatter->IsNumberFormat(aSym, nIndex, nVal);
|
|
if( bSuccess )
|
|
{
|
|
SvNumFormatType nType_ = pFormatter->GetType(nIndex);
|
|
if( !(nType_ & SvNumFormatType::DATE) )
|
|
bSuccess = false;
|
|
}
|
|
|
|
if (!bSuccess)
|
|
GenError( ERRCODE_BASIC_CONVERSION );
|
|
|
|
bNumber = true;
|
|
eScanType = SbxDOUBLE;
|
|
}
|
|
else
|
|
{
|
|
aError = OUString('#');
|
|
GenError( ERRCODE_BASIC_EXPECTED );
|
|
}
|
|
}
|
|
// invalid characters:
|
|
else if (nLineIdx < aLine.getLength() && aLine[nLineIdx] >= 0x7F)
|
|
{
|
|
GenError( ERRCODE_BASIC_SYNTAX ); nLineIdx++; nCol++;
|
|
}
|
|
// other groups:
|
|
else
|
|
{
|
|
sal_Int32 n = 1;
|
|
auto nChar = nLineIdx < aLine.getLength() ? aLine[nLineIdx] : 0;
|
|
++nLineIdx;
|
|
if (nLineIdx < aLine.getLength())
|
|
{
|
|
switch (nChar)
|
|
{
|
|
case '<': if( aLine[nLineIdx] == '>' || aLine[nLineIdx] == '=' ) n = 2; break;
|
|
case '>': if( aLine[nLineIdx] == '=' ) n = 2; break;
|
|
case ':': if( aLine[nLineIdx] == '=' ) n = 2; break;
|
|
}
|
|
}
|
|
aSym = aLine.copy(nCol, std::min(n, aLine.getLength() - nCol));
|
|
nLineIdx += n-1; nCol = nCol + n;
|
|
}
|
|
|
|
nCol2 = nCol-1;
|
|
|
|
PrevLineCommentLbl:
|
|
|
|
if (bPrevLineExtentsComment ||
|
|
(eScanType != SbxSTRING &&
|
|
(aSym.startsWith("'") || aSym.equalsIgnoreAsciiCase("REM") || aSym.startsWith("#"))))
|
|
{
|
|
bPrevLineExtentsComment = false;
|
|
aSym = "REM";
|
|
sal_Int32 nLen = aLine.getLength() - nLineIdx;
|
|
// tdf#149402 - don't extend comment if line ends in a whitespace (BasicCharClass::isWhitespace)
|
|
if (bCompatible && !bLineEndsWithWhitespace && aLine[nLineIdx + nLen - 1] == '_'
|
|
&& aLine[nLineIdx + nLen - 2] == ' ')
|
|
bPrevLineExtentsComment = true;
|
|
nCol2 = nCol2 + nLen;
|
|
nLineIdx = -1;
|
|
}
|
|
|
|
if (nLineIdx == nLineIdxScanStart)
|
|
{
|
|
GenError( ERRCODE_BASIC_SYMBOL_EXPECTED );
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
|
|
|
|
eoln:
|
|
if (nCol && aLine[--nLineIdx] == '_' && !bClosingUnderscore)
|
|
{
|
|
nLineIdx = -1;
|
|
bool bRes = NextSym();
|
|
if( aSym.startsWith(".") )
|
|
{
|
|
// object _
|
|
// .Method
|
|
// ^^^ <- spaces is legal in MSO VBA
|
|
bSpaces = false;
|
|
}
|
|
return bRes;
|
|
}
|
|
else
|
|
{
|
|
nLineIdx = -1;
|
|
nLine = nOldLine;
|
|
nCol1 = nOldCol1;
|
|
nCol2 = nOldCol2;
|
|
aSym = "\n";
|
|
nColLock = 0;
|
|
bClosingUnderscore = false;
|
|
// tdf#149157 - break multiline continuation in a comment after a new line
|
|
bPrevLineExtentsComment = false;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|