2 * Copyright 2008 Jacek Caban for CodeWeavers
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License as published by the Free Software Foundation; either
7 * version 2.1 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser General Public
15 * License along with this library; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
26 #include "parser.tab.h"
28 #include "wine/debug.h"
29 #include "wine/unicode.h"
31 WINE_DEFAULT_DEBUG_CHANNEL(jscript);
33 static const WCHAR breakW[] = {'b','r','e','a','k',0};
34 static const WCHAR caseW[] = {'c','a','s','e',0};
35 static const WCHAR catchW[] = {'c','a','t','c','h',0};
36 static const WCHAR continueW[] = {'c','o','n','t','i','n','u','e',0};
37 static const WCHAR defaultW[] = {'d','e','f','a','u','l','t',0};
38 static const WCHAR deleteW[] = {'d','e','l','e','t','e',0};
39 static const WCHAR doW[] = {'d','o',0};
40 static const WCHAR elseW[] = {'e','l','s','e',0};
41 static const WCHAR falseW[] = {'f','a','l','s','e',0};
42 static const WCHAR finallyW[] = {'f','i','n','a','l','l','y',0};
43 static const WCHAR forW[] = {'f','o','r',0};
44 static const WCHAR functionW[] = {'f','u','n','c','t','i','o','n',0};
45 static const WCHAR ifW[] = {'i','f',0};
46 static const WCHAR inW[] = {'i','n',0};
47 static const WCHAR instanceofW[] = {'i','n','s','t','a','n','c','e','o','f',0};
48 static const WCHAR newW[] = {'n','e','w',0};
49 static const WCHAR nullW[] = {'n','u','l','l',0};
50 static const WCHAR returnW[] = {'r','e','t','u','r','n',0};
51 static const WCHAR switchW[] = {'s','w','i','t','c','h',0};
52 static const WCHAR thisW[] = {'t','h','i','s',0};
53 static const WCHAR throwW[] = {'t','h','r','o','w',0};
54 static const WCHAR trueW[] = {'t','r','u','e',0};
55 static const WCHAR tryW[] = {'t','r','y',0};
56 static const WCHAR typeofW[] = {'t','y','p','e','o','f',0};
57 static const WCHAR undefinedW[] = {'u','n','d','e','f','i','n','e','d',0};
58 static const WCHAR varW[] = {'v','a','r',0};
59 static const WCHAR voidW[] = {'v','o','i','d',0};
60 static const WCHAR whileW[] = {'w','h','i','l','e',0};
61 static const WCHAR withW[] = {'w','i','t','h',0};
70 {continueW, kCONTINUE},
78 {functionW, kFUNCTION},
81 {instanceofW, kINSTANCEOF},
91 {undefinedW, kUNDEFINED},
98 static int lex_error(parser_ctx_t *ctx, HRESULT hres)
104 static int check_keyword(parser_ctx_t *ctx, const WCHAR *word, const WCHAR **lval)
106 const WCHAR *p1 = ctx->ptr;
107 const WCHAR *p2 = word;
109 while(p1 < ctx->end && *p2) {
116 if(*p2 || (p1 < ctx->end && isalnumW(*p1)))
124 /* ECMA-262 3rd Edition 7.3 */
125 static BOOL is_endline(WCHAR c)
127 return c == '\n' || c == '\r' || c == 0x2028 || c == 0x2029;
130 static BOOL is_identifier_char(WCHAR c)
132 return isalnumW(c) || c == '$' || c == '_' || c == '\\';
135 static int hex_to_int(WCHAR c)
137 if('0' <= c && c <= '9')
140 if('a' <= c && c <= 'f')
143 if('A' <= c && c <= 'F')
149 static int check_keywords(parser_ctx_t *ctx, const WCHAR **lval)
151 int min = 0, max = sizeof(keywords)/sizeof(keywords[0])-1, r, i;
156 r = check_keyword(ctx, keywords[i].word, lval);
158 return keywords[i].token;
169 static void skip_spaces(parser_ctx_t *ctx)
171 while(ctx->ptr < ctx->end && isspaceW(*ctx->ptr)) {
172 if(is_endline(*ctx->ptr++))
177 static BOOL skip_comment(parser_ctx_t *ctx)
179 if(ctx->ptr+1 >= ctx->end || *ctx->ptr != '/')
182 switch(ctx->ptr[1]) {
185 while(ctx->ptr+1 < ctx->end && (ctx->ptr[0] != '*' || ctx->ptr[1] != '/'))
188 if(ctx->ptr[0] == '*' && ctx->ptr[1] == '/') {
191 WARN("unexpected end of file (missing end of comment)\n");
197 while(ctx->ptr < ctx->end && !is_endline(*ctx->ptr))
207 static BOOL unescape(WCHAR *str)
249 i = hex_to_int(*++p);
254 i = hex_to_int(*++p);
260 i = hex_to_int(*++p);
265 i = hex_to_int(*++p);
270 i = hex_to_int(*++p);
275 i = hex_to_int(*++p);
292 static int parse_identifier(parser_ctx_t *ctx, const WCHAR **ret)
294 const WCHAR *ptr = ctx->ptr++;
298 while(ctx->ptr < ctx->end && is_identifier_char(*ctx->ptr))
303 *ret = wstr = parser_alloc(ctx, (len+1)*sizeof(WCHAR));
304 memcpy(wstr, ptr, (len+1)*sizeof(WCHAR));
307 /* FIXME: unescape */
311 static int parse_string_literal(parser_ctx_t *ctx, const WCHAR **ret, WCHAR endch)
313 const WCHAR *ptr = ++ctx->ptr;
317 while(ctx->ptr < ctx->end && *ctx->ptr != endch) {
318 if(*ctx->ptr++ == '\\')
322 if(ctx->ptr == ctx->end) {
323 WARN("unexpected end of file\n");
324 return lex_error(ctx, E_FAIL);
329 *ret = wstr = parser_alloc(ctx, (len+1)*sizeof(WCHAR));
330 memcpy(wstr, ptr, (len+1)*sizeof(WCHAR));
335 if(!unescape(wstr)) {
336 WARN("unescape failed\n");
337 return lex_error(ctx, E_FAIL);
340 return tStringLiteral;
343 static literal_t *alloc_int_literal(parser_ctx_t *ctx, LONG l)
345 literal_t *ret = parser_alloc(ctx, sizeof(literal_t));
353 static int parse_double_literal(parser_ctx_t *ctx, LONG int_part, literal_t **literal)
357 if(ctx->ptr == ctx->end || !isdigitW(*ctx->ptr)) {
358 ERR("No digit after point\n");
363 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr))
364 d += (tmp /= 10.0)*(*ctx->ptr++ - '0');
366 if(ctx->ptr < ctx->end && (*ctx->ptr == 'e' || *ctx->ptr == 'E')) {
370 if(ctx->ptr < ctx->end) {
371 if(*ctx->ptr == '+') {
373 }else if(*ctx->ptr == '-') {
376 }else if(!isdigitW(*ctx->ptr)) {
377 WARN("Expected exponent part\n");
378 return lex_error(ctx, E_FAIL);
382 if(ctx->ptr == ctx->end) {
383 WARN("unexpected end of file\n");
384 return lex_error(ctx, E_FAIL);
387 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr))
388 e = e*10 + *ctx->ptr++ - '0';
394 *literal = parser_alloc(ctx, sizeof(literal_t));
395 (*literal)->vt = VT_R8;
396 (*literal)->u.dval = d;
398 return tNumericLiteral;
401 static int parse_numeric_literal(parser_ctx_t *ctx, literal_t **literal)
405 l = *ctx->ptr++ - '0';
406 if(ctx->ptr == ctx->end) {
407 *literal = alloc_int_literal(ctx, l);
408 return tNumericLiteral;
412 if(*ctx->ptr == 'x' || *ctx->ptr == 'X') {
413 if(++ctx->ptr == ctx->end) {
414 ERR("unexpexted end of file\n");
418 while(ctx->ptr < ctx->end && (d = hex_to_int(*ctx->ptr)) != -1) {
423 if(ctx->ptr < ctx->end && is_identifier_char(*ctx->ptr)) {
424 WARN("unexpected identifier char\n");
425 return lex_error(ctx, E_FAIL);
428 *literal = alloc_int_literal(ctx, l);
429 return tNumericLiteral;
432 if(isdigitW(*ctx->ptr) || is_identifier_char(*ctx->ptr)) {
433 WARN("wrong char after zero\n");
434 return lex_error(ctx, E_FAIL);
437 *literal = alloc_int_literal(ctx, 0);
440 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr))
441 l = l*10 + *(ctx->ptr++)-'0';
443 if(ctx->ptr < ctx->end) {
444 if(*ctx->ptr == '.') {
446 return parse_double_literal(ctx, l, literal);
449 if(is_identifier_char(*ctx->ptr)) {
450 WARN("unexpected identifier char\n");
451 return lex_error(ctx, E_FAIL);
455 *literal = alloc_int_literal(ctx, l);
456 return tNumericLiteral;
459 int parser_lex(void *lval, parser_ctx_t *ctx)
467 if(ctx->ptr == ctx->end)
469 }while(skip_comment(ctx));
471 if(isalphaW(*ctx->ptr)) {
472 ret = check_keywords(ctx, lval);
476 return parse_identifier(ctx, (const WCHAR**)lval);
479 if(isdigitW(*ctx->ptr))
480 return parse_numeric_literal(ctx, lval);
496 *(const WCHAR**)lval = ctx->ptr++;
500 if(++ctx->ptr < ctx->end && isdigitW(*ctx->ptr))
501 return parse_double_literal(ctx, 0, lval);
505 if(++ctx->ptr == ctx->end) {
506 *(int*)lval = EXPR_LESS;
513 *(int*)lval = EXPR_LESSEQ;
516 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* <<= */
518 *(int*)lval = EXPR_ASSIGNLSHIFT;
521 *(int*)lval = EXPR_LSHIFT;
524 *(int*)lval = EXPR_LESS;
529 if(++ctx->ptr == ctx->end) { /* > */
530 *(int*)lval = EXPR_GREATER;
537 *(int*)lval = EXPR_GREATEREQ;
540 if(++ctx->ptr < ctx->end) {
541 if(*ctx->ptr == '=') { /* >>= */
543 *(int*)lval = EXPR_ASSIGNRSHIFT;
546 if(*ctx->ptr == '>') { /* >>> */
547 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* >>>= */
549 *(int*)lval = EXPR_ASSIGNRRSHIFT;
552 *(int*)lval = EXPR_RRSHIFT;
556 *(int*)lval = EXPR_RSHIFT;
559 *(int*)lval = EXPR_GREATER;
565 if(ctx->ptr < ctx->end) {
572 *(int*)lval = EXPR_ASSIGNADD;
580 if(ctx->ptr < ctx->end) {
587 *(int*)lval = EXPR_ASSIGNSUB;
594 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* *= */
596 *(int*)lval = EXPR_ASSIGNMUL;
602 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* %= */
604 *(int*)lval = EXPR_ASSIGNMOD;
610 if(++ctx->ptr < ctx->end) {
614 *(int*)lval = EXPR_ASSIGNAND;
624 if(++ctx->ptr < ctx->end) {
628 *(int*)lval = EXPR_ASSIGNOR;
638 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* ^= */
640 *(int*)lval = EXPR_ASSIGNXOR;
646 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* != */
647 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* !== */
649 *(int*)lval = EXPR_NOTEQEQ;
652 *(int*)lval = EXPR_NOTEQ;
658 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* == */
659 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* === */
661 *(int*)lval = EXPR_EQEQ;
664 *(int*)lval = EXPR_EQ;
670 if(++ctx->ptr < ctx->end) {
671 if(*ctx->ptr == '=') { /* /= */
673 *(int*)lval = EXPR_ASSIGNDIV;
681 return parse_string_literal(ctx, (const WCHAR**)lval, *ctx->ptr);
685 return parse_identifier(ctx, lval);
688 WARN("unexpected char '%c' %d\n", *ctx->ptr, *ctx->ptr);
692 static void add_object_literal(parser_ctx_t *ctx, DispatchEx *obj)
694 obj_literal_t *literal = parser_alloc(ctx, sizeof(obj_literal_t));
697 literal->next = ctx->obj_literals;
698 ctx->obj_literals = literal;
701 literal_t *parse_regexp(parser_ctx_t *ctx)
703 const WCHAR *re, *flags;
712 while(ctx->ptr < ctx->end && (*ctx->ptr != '/' || *(ctx->ptr-1) == '\\'))
715 if(ctx->ptr == ctx->end) {
716 WARN("unexpected end of file\n");
720 re_len = ctx->ptr-re;
723 while(ctx->ptr < ctx->end && isalnumW(*ctx->ptr))
726 hres = create_regexp_str(ctx->script, re, re_len, flags, ctx->ptr-flags, ®exp);
730 add_object_literal(ctx, regexp);
732 ret = parser_alloc(ctx, sizeof(literal_t));
733 ret->vt = VT_DISPATCH;
734 ret->u.disp = (IDispatch*)_IDispatchEx_(regexp);