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
27 #include "parser.tab.h"
29 #include "wine/debug.h"
30 #include "wine/unicode.h"
32 WINE_DEFAULT_DEBUG_CHANNEL(jscript);
34 #define LONGLONG_MAX (((LONGLONG)0x7fffffff<<32)|0xffffffff)
36 static const WCHAR breakW[] = {'b','r','e','a','k',0};
37 static const WCHAR caseW[] = {'c','a','s','e',0};
38 static const WCHAR catchW[] = {'c','a','t','c','h',0};
39 static const WCHAR continueW[] = {'c','o','n','t','i','n','u','e',0};
40 static const WCHAR defaultW[] = {'d','e','f','a','u','l','t',0};
41 static const WCHAR deleteW[] = {'d','e','l','e','t','e',0};
42 static const WCHAR doW[] = {'d','o',0};
43 static const WCHAR elseW[] = {'e','l','s','e',0};
44 static const WCHAR falseW[] = {'f','a','l','s','e',0};
45 static const WCHAR finallyW[] = {'f','i','n','a','l','l','y',0};
46 static const WCHAR forW[] = {'f','o','r',0};
47 static const WCHAR functionW[] = {'f','u','n','c','t','i','o','n',0};
48 static const WCHAR ifW[] = {'i','f',0};
49 static const WCHAR inW[] = {'i','n',0};
50 static const WCHAR instanceofW[] = {'i','n','s','t','a','n','c','e','o','f',0};
51 static const WCHAR newW[] = {'n','e','w',0};
52 static const WCHAR nullW[] = {'n','u','l','l',0};
53 static const WCHAR returnW[] = {'r','e','t','u','r','n',0};
54 static const WCHAR switchW[] = {'s','w','i','t','c','h',0};
55 static const WCHAR thisW[] = {'t','h','i','s',0};
56 static const WCHAR throwW[] = {'t','h','r','o','w',0};
57 static const WCHAR trueW[] = {'t','r','u','e',0};
58 static const WCHAR tryW[] = {'t','r','y',0};
59 static const WCHAR typeofW[] = {'t','y','p','e','o','f',0};
60 static const WCHAR undefinedW[] = {'u','n','d','e','f','i','n','e','d',0};
61 static const WCHAR varW[] = {'v','a','r',0};
62 static const WCHAR voidW[] = {'v','o','i','d',0};
63 static const WCHAR whileW[] = {'w','h','i','l','e',0};
64 static const WCHAR withW[] = {'w','i','t','h',0};
73 {continueW, kCONTINUE},
81 {functionW, kFUNCTION},
84 {instanceofW, kINSTANCEOF},
100 static int lex_error(parser_ctx_t *ctx, HRESULT hres)
102 ctx->hres = MAKE_JSERROR(hres);
103 ctx->lexer_error = TRUE;
107 /* ECMA-262 3rd Edition 7.6 */
108 static BOOL is_identifier_char(WCHAR c)
110 return isalnumW(c) || c == '$' || c == '_' || c == '\\';
113 static int check_keyword(parser_ctx_t *ctx, const WCHAR *word, const WCHAR **lval)
115 const WCHAR *p1 = ctx->ptr;
116 const WCHAR *p2 = word;
118 while(p1 < ctx->end && *p2) {
125 if(*p2 || (p1 < ctx->end && is_identifier_char(*p1)))
133 /* ECMA-262 3rd Edition 7.3 */
134 static BOOL is_endline(WCHAR c)
136 return c == '\n' || c == '\r' || c == 0x2028 || c == 0x2029;
139 static int hex_to_int(WCHAR c)
141 if('0' <= c && c <= '9')
144 if('a' <= c && c <= 'f')
147 if('A' <= c && c <= 'F')
153 static int check_keywords(parser_ctx_t *ctx, const WCHAR **lval)
155 int min = 0, max = sizeof(keywords)/sizeof(keywords[0])-1, r, i;
160 r = check_keyword(ctx, keywords[i].word, lval);
162 return keywords[i].token;
173 static void skip_spaces(parser_ctx_t *ctx)
175 while(ctx->ptr < ctx->end && isspaceW(*ctx->ptr)) {
176 if(is_endline(*ctx->ptr++))
181 static BOOL skip_html_comment(parser_ctx_t *ctx)
183 const WCHAR html_commentW[] = {'<','!','-','-',0};
185 if(!ctx->is_html || ctx->ptr+3 >= ctx->end ||
186 memcmp(ctx->ptr, html_commentW, sizeof(WCHAR)*4))
190 while(ctx->ptr < ctx->end && !is_endline(*ctx->ptr++));
195 static BOOL skip_comment(parser_ctx_t *ctx)
197 if(ctx->ptr+1 >= ctx->end || *ctx->ptr != '/')
200 switch(ctx->ptr[1]) {
203 while(ctx->ptr+1 < ctx->end && (ctx->ptr[0] != '*' || ctx->ptr[1] != '/'))
206 if(ctx->ptr[0] == '*' && ctx->ptr[1] == '/') {
209 WARN("unexpected end of file (missing end of comment)\n");
215 while(ctx->ptr < ctx->end && !is_endline(*ctx->ptr))
225 static BOOL unescape(WCHAR *str)
265 i = hex_to_int(*++p);
270 i = hex_to_int(*++p);
276 i = hex_to_int(*++p);
281 i = hex_to_int(*++p);
286 i = hex_to_int(*++p);
291 i = hex_to_int(*++p);
300 c = c*8 + (*p++ - '0');
302 c = c*8 + (*p++ - '0');
318 static int parse_identifier(parser_ctx_t *ctx, const WCHAR **ret)
320 const WCHAR *ptr = ctx->ptr++;
324 while(ctx->ptr < ctx->end && is_identifier_char(*ctx->ptr))
329 *ret = wstr = parser_alloc(ctx, (len+1)*sizeof(WCHAR));
330 memcpy(wstr, ptr, (len+1)*sizeof(WCHAR));
333 /* FIXME: unescape */
337 static int parse_string_literal(parser_ctx_t *ctx, const WCHAR **ret, WCHAR endch)
339 const WCHAR *ptr = ++ctx->ptr;
343 while(ctx->ptr < ctx->end && *ctx->ptr != endch) {
344 if(*ctx->ptr++ == '\\')
348 if(ctx->ptr == ctx->end)
349 return lex_error(ctx, IDS_UNTERMINATED_STR);
353 *ret = wstr = parser_alloc(ctx, (len+1)*sizeof(WCHAR));
354 memcpy(wstr, ptr, (len+1)*sizeof(WCHAR));
359 if(!unescape(wstr)) {
360 WARN("unescape failed\n");
361 return lex_error(ctx, E_FAIL);
364 return tStringLiteral;
367 static literal_t *alloc_int_literal(parser_ctx_t *ctx, LONG l)
369 literal_t *ret = parser_alloc(ctx, sizeof(literal_t));
377 static int parse_double_literal(parser_ctx_t *ctx, LONG int_part, literal_t **literal)
382 if(ctx->ptr == ctx->end || (!isdigitW(*ctx->ptr) &&
383 *ctx->ptr!='.' && *ctx->ptr!='e' && *ctx->ptr!='E')) {
384 ERR("Illegal character\n");
389 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr)) {
390 hlp = d*10 + *(ctx->ptr++) - '0';
391 if(d>LONGLONG_MAX/10 || hlp<0) {
398 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr)) {
403 if(*ctx->ptr == '.') ctx->ptr++;
405 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr)) {
406 hlp = d*10 + *(ctx->ptr++) - '0';
407 if(d>LONGLONG_MAX/10 || hlp<0)
413 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr))
416 if(ctx->ptr < ctx->end && (*ctx->ptr == 'e' || *ctx->ptr == 'E')) {
420 if(ctx->ptr < ctx->end) {
421 if(*ctx->ptr == '+') {
423 }else if(*ctx->ptr == '-') {
426 }else if(!isdigitW(*ctx->ptr)) {
427 WARN("Expected exponent part\n");
428 return lex_error(ctx, E_FAIL);
432 if(ctx->ptr == ctx->end) {
433 WARN("unexpected end of file\n");
434 return lex_error(ctx, E_FAIL);
437 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr)) {
438 if(e > INT_MAX/10 || (e = e*10 + *ctx->ptr++ - '0')<0)
443 if(exp<0 && e<0 && e+exp>0) exp = INT_MIN;
444 else if(exp>0 && e>0 && e+exp<0) exp = INT_MAX;
448 *literal = parser_alloc(ctx, sizeof(literal_t));
449 (*literal)->type = LT_DOUBLE;
450 (*literal)->u.dval = (double)d*pow(10, exp);
452 return tNumericLiteral;
455 static int parse_numeric_literal(parser_ctx_t *ctx, literal_t **literal)
459 l = *ctx->ptr++ - '0';
460 if(ctx->ptr == ctx->end) {
461 *literal = alloc_int_literal(ctx, l);
462 return tNumericLiteral;
466 if(*ctx->ptr == 'x' || *ctx->ptr == 'X') {
467 if(++ctx->ptr == ctx->end) {
468 ERR("unexpexted end of file\n");
472 while(ctx->ptr < ctx->end && (d = hex_to_int(*ctx->ptr)) != -1) {
477 if(ctx->ptr < ctx->end && is_identifier_char(*ctx->ptr)) {
478 WARN("unexpected identifier char\n");
479 return lex_error(ctx, E_FAIL);
482 *literal = alloc_int_literal(ctx, l);
483 return tNumericLiteral;
486 if(isdigitW(*ctx->ptr) || is_identifier_char(*ctx->ptr)) {
487 WARN("wrong char after zero\n");
488 return lex_error(ctx, E_FAIL);
491 *literal = alloc_int_literal(ctx, 0);
494 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr))
496 d = l*10 + *(ctx->ptr)-'0';
498 /* Check for integer overflow */
499 if (l > INT_MAX/10 || d < 0)
500 return parse_double_literal(ctx, l, literal);
506 if(ctx->ptr < ctx->end) {
507 if(*ctx->ptr == '.' || *ctx->ptr == 'e' || *ctx->ptr == 'E')
508 return parse_double_literal(ctx, l, literal);
510 if(is_identifier_char(*ctx->ptr)) {
511 WARN("unexpected identifier char\n");
512 return lex_error(ctx, E_FAIL);
516 *literal = alloc_int_literal(ctx, l);
517 return tNumericLiteral;
520 int parser_lex(void *lval, parser_ctx_t *ctx)
524 ctx->nl = ctx->ptr == ctx->begin;
528 if(ctx->ptr == ctx->end)
530 }while(skip_comment(ctx) || skip_html_comment(ctx));
532 if(isalphaW(*ctx->ptr)) {
533 ret = check_keywords(ctx, lval);
537 return parse_identifier(ctx, lval);
540 if(isdigitW(*ctx->ptr))
541 return parse_numeric_literal(ctx, lval);
557 *(const WCHAR**)lval = ctx->ptr++;
561 if(++ctx->ptr < ctx->end && isdigitW(*ctx->ptr))
562 return parse_double_literal(ctx, 0, lval);
566 if(++ctx->ptr == ctx->end) {
567 *(int*)lval = EXPR_LESS;
574 *(int*)lval = EXPR_LESSEQ;
577 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* <<= */
579 *(int*)lval = EXPR_ASSIGNLSHIFT;
582 *(int*)lval = EXPR_LSHIFT;
585 *(int*)lval = EXPR_LESS;
590 if(++ctx->ptr == ctx->end) { /* > */
591 *(int*)lval = EXPR_GREATER;
598 *(int*)lval = EXPR_GREATEREQ;
601 if(++ctx->ptr < ctx->end) {
602 if(*ctx->ptr == '=') { /* >>= */
604 *(int*)lval = EXPR_ASSIGNRSHIFT;
607 if(*ctx->ptr == '>') { /* >>> */
608 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* >>>= */
610 *(int*)lval = EXPR_ASSIGNRRSHIFT;
613 *(int*)lval = EXPR_RRSHIFT;
617 *(int*)lval = EXPR_RSHIFT;
620 *(int*)lval = EXPR_GREATER;
626 if(ctx->ptr < ctx->end) {
633 *(int*)lval = EXPR_ASSIGNADD;
641 if(ctx->ptr < ctx->end) {
643 case '-': /* -- or --> */
645 if(ctx->is_html && ctx->nl && ctx->ptr < ctx->end && *ctx->ptr == '>') {
652 *(int*)lval = EXPR_ASSIGNSUB;
659 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* *= */
661 *(int*)lval = EXPR_ASSIGNMUL;
667 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* %= */
669 *(int*)lval = EXPR_ASSIGNMOD;
675 if(++ctx->ptr < ctx->end) {
679 *(int*)lval = EXPR_ASSIGNAND;
689 if(++ctx->ptr < ctx->end) {
693 *(int*)lval = EXPR_ASSIGNOR;
703 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* ^= */
705 *(int*)lval = EXPR_ASSIGNXOR;
711 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* != */
712 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* !== */
714 *(int*)lval = EXPR_NOTEQEQ;
717 *(int*)lval = EXPR_NOTEQ;
723 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* == */
724 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* === */
726 *(int*)lval = EXPR_EQEQ;
729 *(int*)lval = EXPR_EQ;
735 if(++ctx->ptr < ctx->end) {
736 if(*ctx->ptr == '=') { /* /= */
738 *(int*)lval = EXPR_ASSIGNDIV;
746 return parse_string_literal(ctx, lval, *ctx->ptr);
750 return parse_identifier(ctx, lval);
753 WARN("unexpected char '%c' %d\n", *ctx->ptr, *ctx->ptr);
757 literal_t *parse_regexp(parser_ctx_t *ctx)
759 const WCHAR *re, *flags_ptr;
766 while(*ctx->ptr != '/')
770 while(ctx->ptr < ctx->end && *ctx->ptr != '/') {
771 if(*ctx->ptr++ == '\\' && ctx->ptr < ctx->end)
775 if(ctx->ptr == ctx->end) {
776 WARN("unexpected end of file\n");
780 re_len = ctx->ptr-re;
782 flags_ptr = ++ctx->ptr;
783 while(ctx->ptr < ctx->end && isalnumW(*ctx->ptr))
786 hres = parse_regexp_flags(flags_ptr, ctx->ptr-flags_ptr, &flags);
790 ret = parser_alloc(ctx, sizeof(literal_t));
791 ret->type = LT_REGEXP;
792 ret->u.regexp.str = re;
793 ret->u.regexp.str_len = re_len;
794 ret->u.regexp.flags = flags;