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office-gobmx/basic/source/comp/token.cxx
Pragat Pandya 6abc09926c tdf#147021 Use std::size() instead of SAL_N_ELEMENTS() macro 
Change-Id: I54257e87da0cd66da59d820c7960c3e4b020fda3
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/134027
Reviewed-by: Bartosz Kosiorek <gang65@poczta.onet.pl>
Tested-by: Jenkins
2022-05-09 20:42:03 +02:00

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/* -*- 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 <array>
#include <basic/sberrors.hxx>
#include <sal/macros.h>
#include <basiccharclass.hxx>
#include <token.hxx>
namespace {
struct TokenTable { SbiToken t; const char *s; };
}
const TokenTable aTokTable_Basic [] = {
{ CAT, "&" },
{ MUL, "*" },
{ PLUS, "+" },
{ MINUS, "-" },
{ DIV, "/" },
{ EOS, ":" },
{ ASSIGN, ":=" },
{ LT, "<" },
{ LE, "<=" },
{ NE, "<>" },
{ EQ, "=" },
{ GT, ">" },
{ GE, ">=" },
{ ACCESS, "Access" },
{ ALIAS, "Alias" },
{ AND, "And" },
{ ANY, "Any" },
{ APPEND, "Append" },
{ AS, "As" },
{ ATTRIBUTE,"Attribute" },
{ BASE, "Base" },
{ BINARY, "Binary" },
{ TBOOLEAN, "Boolean" },
{ BYREF, "ByRef", },
{ TBYTE, "Byte", },
{ BYVAL, "ByVal", },
{ CALL, "Call" },
{ CASE, "Case" },
{ CDECL_, "Cdecl" },
{ CLASSMODULE, "ClassModule" },
{ CLOSE, "Close" },
{ COMPARE, "Compare" },
{ COMPATIBLE,"Compatible" },
{ CONST_, "Const" },
{ TCURRENCY,"Currency" },
{ TDATE, "Date" },
{ DECLARE, "Declare" },
{ DEFBOOL, "DefBool" },
{ DEFCUR, "DefCur" },
{ DEFDATE, "DefDate" },
{ DEFDBL, "DefDbl" },
{ DEFERR, "DefErr" },
{ DEFINT, "DefInt" },
{ DEFLNG, "DefLng" },
{ DEFOBJ, "DefObj" },
{ DEFSNG, "DefSng" },
{ DEFSTR, "DefStr" },
{ DEFVAR, "DefVar" },
{ DIM, "Dim" },
{ DO, "Do" },
{ TDOUBLE, "Double" },
{ EACH, "Each" },
{ ELSE, "Else" },
{ ELSEIF, "ElseIf" },
{ END, "End" },
{ ENDENUM, "End Enum" },
{ ENDFUNC, "End Function" },
{ ENDIF, "End If" },
{ ENDPROPERTY, "End Property" },
{ ENDSELECT,"End Select" },
{ ENDSUB, "End Sub" },
{ ENDTYPE, "End Type" },
{ ENDIF, "EndIf" },
{ ENUM, "Enum" },
{ EQV, "Eqv" },
{ ERASE, "Erase" },
{ ERROR_, "Error" },
{ EXIT, "Exit" },
{ BASIC_EXPLICIT, "Explicit" },
{ FOR, "For" },
{ FUNCTION, "Function" },
{ GET, "Get" },
{ GLOBAL, "Global" },
{ GOSUB, "GoSub" },
{ GOTO, "GoTo" },
{ IF, "If" },
{ IMP, "Imp" },
{ IMPLEMENTS, "Implements" },
{ IN_, "In" },
{ INPUT, "Input" }, // also INPUT #
{ TINTEGER, "Integer" },
{ IS, "Is" },
{ LET, "Let" },
{ LIB, "Lib" },
{ LIKE, "Like" },
{ LINE, "Line" },
{ LINEINPUT,"Line Input" },
{ LOCAL, "Local" },
{ LOCK, "Lock" },
{ TLONG, "Long" },
{ LOOP, "Loop" },
{ LPRINT, "LPrint" },
{ LSET, "LSet" }, // JSM
{ MOD, "Mod" },
{ NAME, "Name" },
{ NEW, "New" },
{ NEXT, "Next" },
{ NOT, "Not" },
{ TOBJECT, "Object" },
{ ON, "On" },
{ OPEN, "Open" },
{ OPTION, "Option" },
{ OPTIONAL_, "Optional" },
{ OR, "Or" },
{ OUTPUT, "Output" },
{ PARAMARRAY, "ParamArray" },
{ PRESERVE, "Preserve" },
{ PRINT, "Print" },
{ PRIVATE, "Private" },
{ PROPERTY, "Property" },
{ PTRSAFE, "PtrSafe" },
{ PUBLIC, "Public" },
{ RANDOM, "Random" },
{ READ, "Read" },
{ REDIM, "ReDim" },
{ REM, "Rem" },
{ RESUME, "Resume" },
{ RETURN, "Return" },
{ RSET, "RSet" }, // JSM
{ SELECT, "Select" },
{ SET, "Set" },
{ SHARED, "Shared" },
{ TSINGLE, "Single" },
{ STATIC, "Static" },
{ STEP, "Step" },
{ STOP, "Stop" },
{ TSTRING, "String" },
{ SUB, "Sub" },
{ STOP, "System" },
{ TEXT, "Text" },
{ THEN, "Then" },
{ TO, "To", },
{ TYPE, "Type" },
{ TYPEOF, "TypeOf" },
{ UNTIL, "Until" },
{ TVARIANT, "Variant" },
{ VBASUPPORT, "VbaSupport" },
{ WEND, "Wend" },
{ WHILE, "While" },
{ WITH, "With" },
{ WITHEVENTS, "WithEvents" },
{ WRITE, "Write" }, // also WRITE #
{ XOR, "Xor" },
};
namespace {
// #i109076
class TokenLabelInfo
{
std::array<bool,VBASUPPORT+1> m_pTokenCanBeLabelTab;
public:
TokenLabelInfo();
bool canTokenBeLabel( SbiToken eTok )
{ return m_pTokenCanBeLabelTab[eTok]; }
};
}
// #i109076
TokenLabelInfo::TokenLabelInfo()
{
m_pTokenCanBeLabelTab.fill(false);
// Token accepted as label by VBA
static const SbiToken eLabelToken[] = { ACCESS, ALIAS, APPEND, BASE, BINARY, CLASSMODULE,
COMPARE, COMPATIBLE, DEFERR, ERROR_, BASIC_EXPLICIT, LIB, LINE, LPRINT, NAME,
TOBJECT, OUTPUT, PROPERTY, RANDOM, READ, STEP, STOP, TEXT, VBASUPPORT };
for( SbiToken eTok : eLabelToken )
{
m_pTokenCanBeLabelTab[eTok] = true;
}
}
SbiTokenizer::SbiTokenizer( const OUString& rSrc, StarBASIC* pb )
: SbiScanner(rSrc, pb)
, eCurTok(NIL)
, ePush(NIL)
, nPLine(0)
, nPCol1(0)
, nPCol2(0)
, bEof(false)
, bEos(true)
, bAs(false)
, bErrorIsSymbol(true)
{
}
void SbiTokenizer::Push( SbiToken t )
{
if( ePush != NIL )
Error( ERRCODE_BASIC_INTERNAL_ERROR, "PUSH" );
else ePush = t;
}
void SbiTokenizer::Error( ErrCode code, const OUString &aMsg )
{
aError = aMsg;
Error( code );
}
void SbiTokenizer::Error( ErrCode code, SbiToken tok )
{
aError = Symbol( tok );
Error( code );
}
// reading in the next token without absorbing it
SbiToken SbiTokenizer::Peek()
{
if( ePush == NIL )
{
sal_Int32 nOldLine = nLine;
sal_Int32 nOldCol1 = nCol1;
sal_Int32 nOldCol2 = nCol2;
ePush = Next();
nPLine = nLine; nLine = nOldLine;
nPCol1 = nCol1; nCol1 = nOldCol1;
nPCol2 = nCol2; nCol2 = nOldCol2;
}
eCurTok = ePush;
return eCurTok;
}
// For decompilation. Numbers and symbols return an empty string.
const OUString& SbiTokenizer::Symbol( SbiToken t )
{
// character token?
if( t < FIRSTKWD )
{
aSym = OUString(sal::static_int_cast<sal_Unicode>(t));
return aSym;
}
switch( t )
{
case NEG :
aSym = "-";
return aSym;
case EOS :
aSym = ":/CRLF";
return aSym;
case EOLN :
aSym = "CRLF";
return aSym;
default:
break;
}
for( auto& rTok : aTokTable_Basic )
{
if( rTok.t == t )
{
aSym = OStringToOUString(rTok.s, RTL_TEXTENCODING_ASCII_US);
return aSym;
}
}
const sal_Unicode *p = aSym.getStr();
if (*p <= ' ')
{
aSym = "???";
}
return aSym;
}
// Reading in the next token and put it down.
// Tokens that don't appear in the token table
// are directly returned as a character.
// Some words are treated in a special way.
SbiToken SbiTokenizer::Next()
{
if (bEof)
{
return EOLN;
}
// have read in one already?
if( ePush != NIL )
{
eCurTok = ePush;
ePush = NIL;
nLine = nPLine;
nCol1 = nPCol1;
nCol2 = nPCol2;
bEos = IsEoln( eCurTok );
return eCurTok;
}
const TokenTable *tp;
if( !NextSym() )
{
bEof = bEos = true;
eCurTok = EOLN;
return eCurTok;
}
if( aSym.startsWith("\n") )
{
bEos = true;
eCurTok = EOLN;
return eCurTok;
}
bEos = false;
if( bNumber )
{
eCurTok = NUMBER;
return eCurTok;
}
else if( ( eScanType == SbxDATE || eScanType == SbxSTRING ) && !bSymbol )
{
eCurTok = FIXSTRING;
return eCurTok;
}
else if( aSym.isEmpty() )
{
//something went wrong
bEof = bEos = true;
eCurTok = EOLN;
return eCurTok;
}
// Special cases of characters that are between "Z" and "a". ICompare()
// evaluates the position of these characters in different ways.
else if( aSym[0] == '^' )
{
eCurTok = EXPON;
return eCurTok;
}
else if( aSym[0] == '\\' )
{
eCurTok = IDIV;
return eCurTok;
}
else
{
if( eScanType != SbxVARIANT )
{
eCurTok = SYMBOL;
return eCurTok;
}
// valid token?
short lb = 0;
short ub = std::size(aTokTable_Basic)-1;
short delta;
do
{
delta = (ub - lb) >> 1;
tp = &aTokTable_Basic[ lb + delta ];
sal_Int32 res = aSym.compareToIgnoreAsciiCaseAscii( tp->s );
if( res == 0 )
{
goto special;
}
if( res < 0 )
{
if ((ub - lb) == 2)
{
ub = lb;
}
else
{
ub = ub - delta;
}
}
else
{
if ((ub -lb) == 2)
{
lb = ub;
}
else
{
lb = lb + delta;
}
}
}
while( delta );
// Symbol? if not >= token
sal_Unicode ch = aSym[0];
if( !BasicCharClass::isAlpha( ch, bCompatible ) && !bSymbol )
{
eCurTok = static_cast<SbiToken>(ch & 0x00FF);
return eCurTok;
}
eCurTok = SYMBOL;
return eCurTok;
}
special:
// #i92642
bool bStartOfLine = (eCurTok == NIL || eCurTok == REM || eCurTok == EOLN ||
eCurTok == THEN || eCurTok == ELSE); // single line If
if( !bStartOfLine && (tp->t == NAME || tp->t == LINE) )
{
eCurTok = SYMBOL;
return eCurTok;
}
else if( tp->t == TEXT )
{
eCurTok = SYMBOL;
return eCurTok;
}
// maybe we can expand this for other statements that have parameters
// that are keywords ( and those keywords are only used within such
// statements )
// what's happening here is that if we come across 'append' ( and we are
// not in the middle of parsing a special statement ( like 'Open')
// we just treat keyword 'append' as a normal 'SYMBOL'.
// Also we accept Dim APPEND
else if ( ( !bInStatement || eCurTok == DIM ) && tp->t == APPEND )
{
eCurTok = SYMBOL;
return eCurTok;
}
// #i92642: Special LINE token handling -> SbiParser::Line()
// END IF, CASE, SUB, DEF, FUNCTION, TYPE, CLASS, WITH
if( tp->t == END )
{
// from 15.3.96, special treatment for END, at Peek() the current
// time is lost, so memorize everything and restore after
sal_Int32 nOldLine = nLine;
sal_Int32 nOldCol = nCol;
sal_Int32 nOldCol1 = nCol1;
sal_Int32 nOldCol2 = nCol2;
OUString aOldSym = aSym;
SaveLine(); // save pLine in the scanner
eCurTok = Peek();
switch( eCurTok )
{
case IF: Next(); eCurTok = ENDIF; break;
case SELECT: Next(); eCurTok = ENDSELECT; break;
case SUB: Next(); eCurTok = ENDSUB; break;
case FUNCTION: Next(); eCurTok = ENDFUNC; break;
case PROPERTY: Next(); eCurTok = ENDPROPERTY; break;
case TYPE: Next(); eCurTok = ENDTYPE; break;
case ENUM: Next(); eCurTok = ENDENUM; break;
case WITH: Next(); eCurTok = ENDWITH; break;
default : eCurTok = END; break;
}
nCol1 = nOldCol1;
if( eCurTok == END )
{
// reset everything so that token is read completely newly after END
ePush = NIL;
nLine = nOldLine;
nCol = nOldCol;
nCol2 = nOldCol2;
aSym = aOldSym;
RestoreLine();
}
return eCurTok;
}
// are data types keywords?
// there is ERROR(), DATA(), STRING() etc.
eCurTok = tp->t;
// AS: data types are keywords
if( tp->t == AS )
{
bAs = true;
}
else
{
if( bAs )
{
bAs = false;
}
else if( eCurTok >= DATATYPE1 && eCurTok <= DATATYPE2 && (bErrorIsSymbol || eCurTok != ERROR_) )
{
eCurTok = SYMBOL;
}
}
// CLASSMODULE, PROPERTY, GET, ENUM token only visible in compatible mode
SbiToken eTok = tp->t;
if( bCompatible )
{
// #129904 Suppress system
if( eTok == STOP && aSym.equalsIgnoreAsciiCase("system") )
{
eCurTok = SYMBOL;
}
if( eTok == GET && bStartOfLine )
{
eCurTok = SYMBOL;
}
}
else
{
if( eTok == CLASSMODULE ||
eTok == IMPLEMENTS ||
eTok == PARAMARRAY ||
eTok == ENUM ||
eTok == PROPERTY ||
eTok == GET ||
eTok == TYPEOF )
{
eCurTok = SYMBOL;
}
}
bEos = IsEoln( eCurTok );
return eCurTok;
}
bool SbiTokenizer::MayBeLabel( bool bNeedsColon )
{
static TokenLabelInfo gaStaticTokenLabelInfo;
if( eCurTok == SYMBOL || gaStaticTokenLabelInfo.canTokenBeLabel( eCurTok ) )
{
return !bNeedsColon || DoesColonFollow();
}
else
{
return ( eCurTok == NUMBER
&& eScanType == SbxINTEGER
&& nVal >= 0 );
}
}
OUString SbiTokenizer::GetKeywordCase( const OUString& sKeyword )
{
for( auto& rTok : aTokTable_Basic )
{
if( sKeyword.equalsIgnoreAsciiCaseAscii(rTok.s) )
return OStringToOUString(rTok.s, RTL_TEXTENCODING_ASCII_US);
}
return OUString();
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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