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},
94 {undefinedW, kUNDEFINED},
101 static int lex_error(parser_ctx_t *ctx, HRESULT hres)
107 static int check_keyword(parser_ctx_t *ctx, const WCHAR *word, const WCHAR **lval)
109 const WCHAR *p1 = ctx->ptr;
110 const WCHAR *p2 = word;
112 while(p1 < ctx->end && *p2) {
119 if(*p2 || (p1 < ctx->end && isalnumW(*p1)))
127 /* ECMA-262 3rd Edition 7.3 */
128 static BOOL is_endline(WCHAR c)
130 return c == '\n' || c == '\r' || c == 0x2028 || c == 0x2029;
133 static BOOL is_identifier_char(WCHAR c)
135 return isalnumW(c) || c == '$' || c == '_' || c == '\\';
138 static int hex_to_int(WCHAR c)
140 if('0' <= c && c <= '9')
143 if('a' <= c && c <= 'f')
146 if('A' <= c && c <= 'F')
152 static int check_keywords(parser_ctx_t *ctx, const WCHAR **lval)
154 int min = 0, max = sizeof(keywords)/sizeof(keywords[0])-1, r, i;
159 r = check_keyword(ctx, keywords[i].word, lval);
161 return keywords[i].token;
172 static void skip_spaces(parser_ctx_t *ctx)
174 while(ctx->ptr < ctx->end && isspaceW(*ctx->ptr)) {
175 if(is_endline(*ctx->ptr++))
180 static BOOL skip_html_comment(parser_ctx_t *ctx)
182 const WCHAR html_commentW[] = {'<','!','-','-',0};
184 if(!ctx->is_html || ctx->ptr+3 >= ctx->end ||
185 memcmp(ctx->ptr, html_commentW, sizeof(WCHAR)*4))
189 while(ctx->ptr < ctx->end && !is_endline(*ctx->ptr++));
194 static BOOL skip_comment(parser_ctx_t *ctx)
196 if(ctx->ptr+1 >= ctx->end || *ctx->ptr != '/')
199 switch(ctx->ptr[1]) {
202 while(ctx->ptr+1 < ctx->end && (ctx->ptr[0] != '*' || ctx->ptr[1] != '/'))
205 if(ctx->ptr[0] == '*' && ctx->ptr[1] == '/') {
208 WARN("unexpected end of file (missing end of comment)\n");
214 while(ctx->ptr < ctx->end && !is_endline(*ctx->ptr))
224 static BOOL unescape(WCHAR *str)
264 i = hex_to_int(*++p);
269 i = hex_to_int(*++p);
275 i = hex_to_int(*++p);
280 i = hex_to_int(*++p);
285 i = hex_to_int(*++p);
290 i = hex_to_int(*++p);
299 c = c*10 + (*p++ - '0');
315 static int parse_identifier(parser_ctx_t *ctx, const WCHAR **ret)
317 const WCHAR *ptr = ctx->ptr++;
321 while(ctx->ptr < ctx->end && is_identifier_char(*ctx->ptr))
326 *ret = wstr = parser_alloc(ctx, (len+1)*sizeof(WCHAR));
327 memcpy(wstr, ptr, (len+1)*sizeof(WCHAR));
330 /* FIXME: unescape */
334 static int parse_string_literal(parser_ctx_t *ctx, const WCHAR **ret, WCHAR endch)
336 const WCHAR *ptr = ++ctx->ptr;
340 while(ctx->ptr < ctx->end && *ctx->ptr != endch) {
341 if(*ctx->ptr++ == '\\')
345 if(ctx->ptr == ctx->end) {
346 WARN("unexpected end of file\n");
347 return lex_error(ctx, E_FAIL);
352 *ret = wstr = parser_alloc(ctx, (len+1)*sizeof(WCHAR));
353 memcpy(wstr, ptr, (len+1)*sizeof(WCHAR));
358 if(!unescape(wstr)) {
359 WARN("unescape failed\n");
360 return lex_error(ctx, E_FAIL);
363 return tStringLiteral;
366 static literal_t *alloc_int_literal(parser_ctx_t *ctx, LONG l)
368 literal_t *ret = parser_alloc(ctx, sizeof(literal_t));
376 static int parse_double_literal(parser_ctx_t *ctx, LONG int_part, literal_t **literal)
381 if(ctx->ptr == ctx->end || (!isdigitW(*ctx->ptr) &&
382 *ctx->ptr!='.' && *ctx->ptr!='e' && *ctx->ptr!='E')) {
383 ERR("Illegal character\n");
388 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr)) {
389 hlp = d*10 + *(ctx->ptr++) - '0';
390 if(d>LONGLONG_MAX/10 || hlp<0) {
397 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr)) {
402 if(*ctx->ptr == '.') ctx->ptr++;
404 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr)) {
405 hlp = d*10 + *(ctx->ptr++) - '0';
406 if(d>LONGLONG_MAX/10 || hlp<0)
412 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr))
415 if(ctx->ptr < ctx->end && (*ctx->ptr == 'e' || *ctx->ptr == 'E')) {
419 if(ctx->ptr < ctx->end) {
420 if(*ctx->ptr == '+') {
422 }else if(*ctx->ptr == '-') {
425 }else if(!isdigitW(*ctx->ptr)) {
426 WARN("Expected exponent part\n");
427 return lex_error(ctx, E_FAIL);
431 if(ctx->ptr == ctx->end) {
432 WARN("unexpected end of file\n");
433 return lex_error(ctx, E_FAIL);
436 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr)) {
437 if(e > INT_MAX/10 || (e = e*10 + *ctx->ptr++ - '0')<0)
442 if(exp<0 && e<0 && e+exp>0) exp = INT_MIN;
443 else if(exp>0 && e>0 && e+exp<0) exp = INT_MAX;
447 *literal = parser_alloc(ctx, sizeof(literal_t));
448 (*literal)->vt = VT_R8;
449 (*literal)->u.dval = (double)d*pow(10, exp);
451 return tNumericLiteral;
454 static int parse_numeric_literal(parser_ctx_t *ctx, literal_t **literal)
458 l = *ctx->ptr++ - '0';
459 if(ctx->ptr == ctx->end) {
460 *literal = alloc_int_literal(ctx, l);
461 return tNumericLiteral;
465 if(*ctx->ptr == 'x' || *ctx->ptr == 'X') {
466 if(++ctx->ptr == ctx->end) {
467 ERR("unexpexted end of file\n");
471 while(ctx->ptr < ctx->end && (d = hex_to_int(*ctx->ptr)) != -1) {
476 if(ctx->ptr < ctx->end && is_identifier_char(*ctx->ptr)) {
477 WARN("unexpected identifier char\n");
478 return lex_error(ctx, E_FAIL);
481 *literal = alloc_int_literal(ctx, l);
482 return tNumericLiteral;
485 if(isdigitW(*ctx->ptr) || is_identifier_char(*ctx->ptr)) {
486 WARN("wrong char after zero\n");
487 return lex_error(ctx, E_FAIL);
490 *literal = alloc_int_literal(ctx, 0);
493 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr))
495 d = l*10 + *(ctx->ptr)-'0';
497 /* Check for integer overflow */
498 if (l > INT_MAX/10 || d < 0)
499 return parse_double_literal(ctx, l, literal);
505 if(ctx->ptr < ctx->end) {
506 if(*ctx->ptr == '.' || *ctx->ptr == 'e' || *ctx->ptr == 'E')
507 return parse_double_literal(ctx, l, literal);
509 if(is_identifier_char(*ctx->ptr)) {
510 WARN("unexpected identifier char\n");
511 return lex_error(ctx, E_FAIL);
515 *literal = alloc_int_literal(ctx, l);
516 return tNumericLiteral;
519 int parser_lex(void *lval, parser_ctx_t *ctx)
523 ctx->nl = ctx->ptr == ctx->begin;
527 if(ctx->ptr == ctx->end)
529 }while(skip_comment(ctx) || skip_html_comment(ctx));
531 if(isalphaW(*ctx->ptr)) {
532 ret = check_keywords(ctx, lval);
536 return parse_identifier(ctx, lval);
539 if(isdigitW(*ctx->ptr))
540 return parse_numeric_literal(ctx, lval);
556 *(const WCHAR**)lval = ctx->ptr++;
560 if(++ctx->ptr < ctx->end && isdigitW(*ctx->ptr))
561 return parse_double_literal(ctx, 0, lval);
565 if(++ctx->ptr == ctx->end) {
566 *(int*)lval = EXPR_LESS;
573 *(int*)lval = EXPR_LESSEQ;
576 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* <<= */
578 *(int*)lval = EXPR_ASSIGNLSHIFT;
581 *(int*)lval = EXPR_LSHIFT;
584 *(int*)lval = EXPR_LESS;
589 if(++ctx->ptr == ctx->end) { /* > */
590 *(int*)lval = EXPR_GREATER;
597 *(int*)lval = EXPR_GREATEREQ;
600 if(++ctx->ptr < ctx->end) {
601 if(*ctx->ptr == '=') { /* >>= */
603 *(int*)lval = EXPR_ASSIGNRSHIFT;
606 if(*ctx->ptr == '>') { /* >>> */
607 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* >>>= */
609 *(int*)lval = EXPR_ASSIGNRRSHIFT;
612 *(int*)lval = EXPR_RRSHIFT;
616 *(int*)lval = EXPR_RSHIFT;
619 *(int*)lval = EXPR_GREATER;
625 if(ctx->ptr < ctx->end) {
632 *(int*)lval = EXPR_ASSIGNADD;
640 if(ctx->ptr < ctx->end) {
642 case '-': /* -- or --> */
644 if(ctx->is_html && ctx->nl && ctx->ptr < ctx->end && *ctx->ptr == '>') {
651 *(int*)lval = EXPR_ASSIGNSUB;
658 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* *= */
660 *(int*)lval = EXPR_ASSIGNMUL;
666 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* %= */
668 *(int*)lval = EXPR_ASSIGNMOD;
674 if(++ctx->ptr < ctx->end) {
678 *(int*)lval = EXPR_ASSIGNAND;
688 if(++ctx->ptr < ctx->end) {
692 *(int*)lval = EXPR_ASSIGNOR;
702 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* ^= */
704 *(int*)lval = EXPR_ASSIGNXOR;
710 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* != */
711 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* !== */
713 *(int*)lval = EXPR_NOTEQEQ;
716 *(int*)lval = EXPR_NOTEQ;
722 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* == */
723 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* === */
725 *(int*)lval = EXPR_EQEQ;
728 *(int*)lval = EXPR_EQ;
734 if(++ctx->ptr < ctx->end) {
735 if(*ctx->ptr == '=') { /* /= */
737 *(int*)lval = EXPR_ASSIGNDIV;
745 return parse_string_literal(ctx, lval, *ctx->ptr);
749 return parse_identifier(ctx, lval);
752 WARN("unexpected char '%c' %d\n", *ctx->ptr, *ctx->ptr);
756 static void add_object_literal(parser_ctx_t *ctx, DispatchEx *obj)
758 obj_literal_t *literal = parser_alloc(ctx, sizeof(obj_literal_t));
761 literal->next = ctx->obj_literals;
762 ctx->obj_literals = literal;
765 literal_t *parse_regexp(parser_ctx_t *ctx)
767 const WCHAR *re, *flags;
776 while(ctx->ptr < ctx->end && *ctx->ptr != '/') {
777 if(*ctx->ptr++ == '\\' && ctx->ptr < ctx->end)
781 if(ctx->ptr == ctx->end) {
782 WARN("unexpected end of file\n");
786 re_len = ctx->ptr-re;
789 while(ctx->ptr < ctx->end && isalnumW(*ctx->ptr))
792 hres = create_regexp_str(ctx->script, re, re_len, flags, ctx->ptr-flags, ®exp);
796 add_object_literal(ctx, regexp);
798 ret = parser_alloc(ctx, sizeof(literal_t));
799 ret->vt = VT_DISPATCH;
800 ret->u.disp = (IDispatch*)_IDispatchEx_(regexp);