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
/*
* Copyright 2011 Jacek Caban for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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 for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <assert.h>
#include "vbscript.h"
#include "parse.h"
#include "parser.tab.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(vbscript);
static const WCHAR andW[] = {'a','n','d',0};
static const WCHAR byrefW[] = {'b','y','r','e','f',0};
static const WCHAR byvalW[] = {'b','y','v','a','l',0};
static const WCHAR callW[] = {'c','a','l','l',0};
static const WCHAR classW[] = {'c','l','a','s','s',0};
static const WCHAR constW[] = {'c','o','n','s','t',0};
static const WCHAR defaultW[] = {'d','e','f','a','u','l','t',0};
static const WCHAR dimW[] = {'d','i','m',0};
static const WCHAR doW[] = {'d','o',0};
static const WCHAR eachW[] = {'e','a','c','h',0};
static const WCHAR elseW[] = {'e','l','s','e',0};
static const WCHAR elseifW[] = {'e','l','s','e','i','f',0};
static const WCHAR emptyW[] = {'e','m','p','t','y',0};
static const WCHAR endW[] = {'e','n','d',0};
static const WCHAR eqvW[] = {'e','q','v',0};
static const WCHAR errorW[] = {'e','r','r','o','r',0};
static const WCHAR exitW[] = {'e','x','i','t',0};
static const WCHAR explicitW[] = {'e','x','p','l','i','c','i','t',0};
static const WCHAR falseW[] = {'f','a','l','s','e',0};
static const WCHAR forW[] = {'f','o','r',0};
static const WCHAR functionW[] = {'f','u','n','c','t','i','o','n',0};
static const WCHAR getW[] = {'g','e','t',0};
static const WCHAR gotoW[] = {'g','o','t','o',0};
static const WCHAR ifW[] = {'i','f',0};
static const WCHAR impW[] = {'i','m','p',0};
static const WCHAR inW[] = {'i','n',0};
static const WCHAR isW[] = {'i','s',0};
static const WCHAR letW[] = {'l','e','t',0};
static const WCHAR loopW[] = {'l','o','o','p',0};
static const WCHAR meW[] = {'m','e',0};
static const WCHAR modW[] = {'m','o','d',0};
static const WCHAR newW[] = {'n','e','w',0};
static const WCHAR nextW[] = {'n','e','x','t',0};
static const WCHAR notW[] = {'n','o','t',0};
static const WCHAR nothingW[] = {'n','o','t','h','i','n','g',0};
static const WCHAR nullW[] = {'n','u','l','l',0};
static const WCHAR onW[] = {'o','n',0};
static const WCHAR optionW[] = {'o','p','t','i','o','n',0};
static const WCHAR orW[] = {'o','r',0};
static const WCHAR privateW[] = {'p','r','i','v','a','t','e',0};
static const WCHAR propertyW[] = {'p','r','o','p','e','r','t','y',0};
static const WCHAR publicW[] = {'p','u','b','l','i','c',0};
static const WCHAR remW[] = {'r','e','m',0};
static const WCHAR resumeW[] = {'r','e','s','u','m','e',0};
static const WCHAR setW[] = {'s','e','t',0};
static const WCHAR stepW[] = {'s','t','e','p',0};
static const WCHAR stopW[] = {'s','t','o','p',0};
static const WCHAR subW[] = {'s','u','b',0};
static const WCHAR thenW[] = {'t','h','e','n',0};
static const WCHAR toW[] = {'t','o',0};
static const WCHAR trueW[] = {'t','r','u','e',0};
static const WCHAR untilW[] = {'u','n','t','i','l',0};
static const WCHAR wendW[] = {'w','e','n','d',0};
static const WCHAR whileW[] = {'w','h','i','l','e',0};
static const WCHAR xorW[] = {'x','o','r',0};
static const struct {
const WCHAR *word;
int token;
} keywords[] = {
{andW, tAND},
{byrefW, tBYREF},
{byvalW, tBYVAL},
{callW, tCALL},
{classW, tCLASS},
{constW, tCONST},
{defaultW, tDEFAULT},
{dimW, tDIM},
{doW, tDO},
{eachW, tEACH},
{elseW, tELSE},
{elseifW, tELSEIF},
{emptyW, tEMPTY},
{endW, tEND},
{eqvW, tEQV},
{errorW, tERROR},
{exitW, tEXIT},
{explicitW, tEXPLICIT},
{falseW, tFALSE},
{forW, tFOR},
{functionW, tFUNCTION},
{getW, tGET},
{gotoW, tGOTO},
{ifW, tIF},
{impW, tIMP},
{inW, tIN},
{isW, tIS},
{letW, tLET},
{loopW, tLOOP},
{meW, tME},
{modW, tMOD},
{newW, tNEW},
{nextW, tNEXT},
{notW, tNOT},
{nothingW, tNOTHING},
{nullW, tNULL},
{onW, tON},
{optionW, tOPTION},
{orW, tOR},
{privateW, tPRIVATE},
{propertyW, tPROPERTY},
{publicW, tPUBLIC},
{remW, tREM},
{resumeW, tRESUME},
{setW, tSET},
{stepW, tSTEP},
{stopW, tSTOP},
{subW, tSUB},
{thenW, tTHEN},
{toW, tTO},
{trueW, tTRUE},
{untilW, tUNTIL},
{wendW, tWEND},
{whileW, tWHILE},
{xorW, tXOR}
};
static inline BOOL is_identifier_char(WCHAR c)
{
return isalnumW(c) || c == '_';
}
static int check_keyword(parser_ctx_t *ctx, const WCHAR *word)
{
const WCHAR *p1 = ctx->ptr;
const WCHAR *p2 = word;
WCHAR c;
while(p1 < ctx->end && *p2) {
c = tolowerW(*p1);
if(c != *p2)
return c - *p2;
p1++;
p2++;
}
if(*p2 || (p1 < ctx->end && is_identifier_char(*p1)))
return 1;
ctx->ptr = p1;
return 0;
}
static int check_keywords(parser_ctx_t *ctx)
{
int min = 0, max = sizeof(keywords)/sizeof(keywords[0])-1, r, i;
while(min <= max) {
i = (min+max)/2;
r = check_keyword(ctx, keywords[i].word);
if(!r)
return keywords[i].token;
if(r > 0)
min = i+1;
else
max = i-1;
}
return 0;
}
static int parse_identifier(parser_ctx_t *ctx, const WCHAR **ret)
{
const WCHAR *ptr = ctx->ptr++;
WCHAR *str;
int len;
while(ctx->ptr < ctx->end && is_identifier_char(*ctx->ptr))
ctx->ptr++;
len = ctx->ptr-ptr;
str = parser_alloc(ctx, (len+1)*sizeof(WCHAR));
if(!str)
return 0;
memcpy(str, ptr, (len+1)*sizeof(WCHAR));
str[len] = 0;
*ret = str;
return tIdentifier;
}
static int parse_string_literal(parser_ctx_t *ctx, const WCHAR **ret)
{
const WCHAR *ptr = ++ctx->ptr;
WCHAR *rptr;
int len = 0;
while(ctx->ptr < ctx->end) {
if(*ctx->ptr == '\n') {
FIXME("newline inside string literal\n");
return 0;
}
if(*ctx->ptr == '"') {
if(ctx->ptr[1] != '"')
break;
len--;
ctx->ptr++;
}
ctx->ptr++;
}
if(ctx->ptr == ctx->end) {
FIXME("unterminated string literal\n");
return 0;
}
len += ctx->ptr-ptr;
*ret = rptr = parser_alloc(ctx, (len+1)*sizeof(WCHAR));
if(!rptr)
return 0;
while(ptr < ctx->ptr) {
if(*ptr == '"')
ptr++;
*rptr++ = *ptr++;
}
*rptr = 0;
ctx->ptr++;
return tString;
}
static int parse_numeric_literal(parser_ctx_t *ctx, void **ret)
{
double n = 0;
if(*ctx->ptr == '0' && !('0' <= ctx->ptr[1] && ctx->ptr[1] <= '9') && ctx->ptr[1] != '.')
return *ctx->ptr++;
do {
n = n*10 + *ctx->ptr++ - '0';
}while('0' <= *ctx->ptr && *ctx->ptr <= '9');
if(*ctx->ptr != '.') {
if((LONG)n == n) {
LONG l = n;
*(LONG*)ret = l;
return (short)l == l ? tShort : tLong;
}
}else {
double e = 1.0;
while('0' <= *++ctx->ptr && *ctx->ptr <= '9')
n += (e /= 10.0)*(*ctx->ptr-'0');
}
*(double*)ret = n;
return tDouble;
}
static int hex_to_int(WCHAR c)
{
if('0' <= c && c <= '9')
return c-'0';
if('a' <= c && c <= 'f')
return c+10-'a';
if('A' <= c && c <= 'F')
return c+10-'A';
return -1;
}
static int parse_hex_literal(parser_ctx_t *ctx, LONG *ret)
{
const WCHAR *begin = ctx->ptr;
LONG l = 0, d;
while((d = hex_to_int(*++ctx->ptr)) != -1)
l = l*16 + d;
if(begin + 9 /* max digits+1 */ < ctx->ptr || (*ctx->ptr != '&' && is_identifier_char(*ctx->ptr))) {
FIXME("invalid literal\n");
return 0;
}
if(*ctx->ptr == '&')
ctx->ptr++;
*ret = l;
return (short)l == l ? tShort : tLong;
}
static void skip_spaces(parser_ctx_t *ctx)
{
while(*ctx->ptr == ' ' || *ctx->ptr == '\t' || *ctx->ptr == '\r')
ctx->ptr++;
}
static int parse_next_token(void *lval, parser_ctx_t *ctx)
{
WCHAR c;
skip_spaces(ctx);
if(ctx->ptr == ctx->end)
return ctx->last_token == tNL ? tEOF : tNL;
c = *ctx->ptr;
if('0' <= c && c <= '9')
return parse_numeric_literal(ctx, lval);
if(isalphaW(c)) {
int ret = check_keywords(ctx);
if(!ret)
return parse_identifier(ctx, lval);
if(ret != tREM)
return ret;
c = '\'';
}
switch(c) {
case '\n':
ctx->ptr++;
return tNL;
case '\'':
ctx->ptr = strchrW(ctx->ptr, '\n');
if(ctx->ptr)
ctx->ptr++;
else
ctx->ptr = ctx->end;
return tNL;
case ':':
case ')':
case ',':
case '=':
case '+':
case '-':
case '*':
case '/':
case '^':
case '\\':
case '.':
case '_':
return *ctx->ptr++;
case '(':
/* NOTE:
* We resolve empty brackets in lexer instead of parser to avoid complex conflicts
* in call statement special case |f()| without 'call' keyword
*/
ctx->ptr++;
skip_spaces(ctx);
if(*ctx->ptr == ')') {
ctx->ptr++;
return tEMPTYBRACKETS;
}
return '(';
case '"':
return parse_string_literal(ctx, lval);
case '&':
if(*++ctx->ptr == 'h' || *ctx->ptr == 'H')
return parse_hex_literal(ctx, lval);
return '&';
case '<':
switch(*++ctx->ptr) {
case '>':
ctx->ptr++;
return tNEQ;
case '=':
ctx->ptr++;
return tLTEQ;
}
return '<';
case '>':
if(*++ctx->ptr == '=') {
ctx->ptr++;
return tGTEQ;
}
return '>';
default:
FIXME("Unhandled char %c in %s\n", *ctx->ptr, debugstr_w(ctx->ptr));
}
return 0;
}
int parser_lex(void *lval, parser_ctx_t *ctx)
{
int ret;
while(1) {
ret = parse_next_token(lval, ctx);
if(ret == '_') {
skip_spaces(ctx);
if(*ctx->ptr != '\n') {
FIXME("'_' not followed by newline\n");
return 0;
}
ctx->ptr++;
continue;
}
if(ret != tNL || ctx->last_token != tNL)
break;
ctx->last_nl = ctx->ptr-ctx->code;
}
return (ctx->last_token = ret);
}