1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
/* -*- 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>

struct TokenTable { SbiToken t; const char *s; };

static 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" },
};

// #i109076
class TokenLabelInfo
{
    std::array<bool,VBASUPPORT+1> m_pTokenCanBeLabelTab;

public:
    TokenLabelInfo();

    bool canTokenBeLabel( SbiToken eTok )
        { return m_pTokenCanBeLabelTab[eTok]; }
};

class StaticTokenLabelInfo: public ::rtl::Static< TokenLabelInfo, StaticTokenLabelInfo >{};

// #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_uInt16 nOldLine = nLine;
        sal_uInt16 nOldCol1 = nCol1;
        sal_uInt16 nOldCol2 = nCol2;
        ePush = Next();
        nPLine = nLine; nLine = nOldLine;
        nPCol1 = nCol1; nCol1 = nOldCol1;
        nPCol2 = nCol2; nCol2 = nOldCol2;
    }
    return eCurTok = ePush;
}

// 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 )
        {<--- Consider using std::find_if algorithm instead of a raw loop.
            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;
        return eCurTok = EOLN;
    }

    if( aSym.startsWith("\n") )
    {
        bEos = true;
        return eCurTok = EOLN;
    }
    bEos = false;

    if( bNumber )
    {
        return eCurTok = NUMBER;
    }
    else if( ( eScanType == SbxDATE || eScanType == SbxSTRING ) && !bSymbol )
    {
        return eCurTok = FIXSTRING;
    }
    else if( aSym.isEmpty() )
    {
        //something went wrong
        bEof = bEos = true;
        return eCurTok = EOLN;
    }
    // Special cases of characters that are between "Z" and "a". ICompare()
    // evaluates the position of these characters in different ways.
    else if( aSym[0] == '^' )
    {
        return eCurTok = EXPON;
    }
    else if( aSym[0] == '\\' )
    {
        return eCurTok = IDIV;
    }
    else
    {
        if( eScanType != SbxVARIANT )
            return eCurTok = SYMBOL;
        // valid token?
        short lb = 0;
        short ub = SAL_N_ELEMENTS(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 )
        {
            return eCurTok = static_cast<SbiToken>(ch & 0x00FF);
        }
        return eCurTok = SYMBOL;
    }
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) )
    {
        return eCurTok = SYMBOL;
    }
    else if( tp->t == TEXT )
    {
        return eCurTok = SYMBOL;
    }
    // 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 )
    {
        return eCurTok = SYMBOL;
    }
    // #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_uInt16 nOldLine = nLine;
        sal_uInt16 nOldCol  = nCol;
        sal_uInt16 nOldCol1 = nCol1;
        sal_uInt16 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 )
{
    if( eCurTok == SYMBOL || StaticTokenLabelInfo::get().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) )<--- Consider using std::find_if algorithm instead of a raw loop.
            return OStringToOUString(rTok.s, RTL_TEXTENCODING_ASCII_US);
    }
    return OUString();
}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */