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)
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)))
134 /* ECMA-262 3rd Edition 7.3 */
135 static BOOL is_endline(WCHAR c)
137 return c == '\n' || c == '\r' || c == 0x2028 || c == 0x2029;
140 static int hex_to_int(WCHAR c)
142 if('0' <= c && c <= '9')
145 if('a' <= c && c <= 'f')
148 if('A' <= c && c <= 'F')
154 static int check_keywords(parser_ctx_t *ctx, const WCHAR **lval)
156 int min = 0, max = sizeof(keywords)/sizeof(keywords[0])-1, r, i;
161 r = check_keyword(ctx, keywords[i].word, lval);
163 return keywords[i].token;
174 static void skip_spaces(parser_ctx_t *ctx)
176 while(ctx->ptr < ctx->end && isspaceW(*ctx->ptr)) {
177 if(is_endline(*ctx->ptr++))
182 static BOOL skip_html_comment(parser_ctx_t *ctx)
184 const WCHAR html_commentW[] = {'<','!','-','-',0};
186 if(!ctx->is_html || ctx->ptr+3 >= ctx->end ||
187 memcmp(ctx->ptr, html_commentW, sizeof(WCHAR)*4))
191 while(ctx->ptr < ctx->end && !is_endline(*ctx->ptr++));
196 static BOOL skip_comment(parser_ctx_t *ctx)
198 if(ctx->ptr+1 >= ctx->end)
201 if(*ctx->ptr != '/') {
202 if(*ctx->ptr == '@' && ctx->ptr+2 < ctx->end && ctx->ptr[1] == '*' && ctx->ptr[2] == '/') {
210 switch(ctx->ptr[1]) {
213 if(ctx->ptr+2 < ctx->end && *ctx->ptr == '@' && is_identifier_char(ctx->ptr[1]))
215 while(ctx->ptr+1 < ctx->end && (ctx->ptr[0] != '*' || ctx->ptr[1] != '/'))
218 if(ctx->ptr[0] == '*' && ctx->ptr[1] == '/') {
221 WARN("unexpected end of file (missing end of comment)\n");
227 if(ctx->ptr+2 < ctx->end && *ctx->ptr == '@' && is_identifier_char(ctx->ptr[1]))
229 while(ctx->ptr < ctx->end && !is_endline(*ctx->ptr))
239 static BOOL unescape(WCHAR *str)
275 i = hex_to_int(*++p);
280 i = hex_to_int(*++p);
286 i = hex_to_int(*++p);
291 i = hex_to_int(*++p);
296 i = hex_to_int(*++p);
301 i = hex_to_int(*++p);
310 c = c*8 + (*p++ - '0');
312 c = c*8 + (*p++ - '0');
328 static int parse_identifier(parser_ctx_t *ctx, const WCHAR **ret)
330 const WCHAR *ptr = ctx->ptr++;
334 while(ctx->ptr < ctx->end && is_identifier_char(*ctx->ptr))
339 *ret = wstr = parser_alloc(ctx, (len+1)*sizeof(WCHAR));
340 memcpy(wstr, ptr, len*sizeof(WCHAR));
343 /* FIXME: unescape */
347 static int parse_string_literal(parser_ctx_t *ctx, const WCHAR **ret, WCHAR endch)
349 const WCHAR *ptr = ++ctx->ptr;
353 while(ctx->ptr < ctx->end && *ctx->ptr != endch) {
354 if(*ctx->ptr++ == '\\')
358 if(ctx->ptr == ctx->end)
359 return lex_error(ctx, JS_E_UNTERMINATED_STRING);
363 *ret = wstr = parser_alloc(ctx, (len+1)*sizeof(WCHAR));
364 memcpy(wstr, ptr, len*sizeof(WCHAR));
369 if(!unescape(wstr)) {
370 WARN("unescape failed\n");
371 return lex_error(ctx, E_FAIL);
374 return tStringLiteral;
377 static literal_t *new_int_literal(parser_ctx_t *ctx, LONG l)
379 literal_t *ret = parser_alloc(ctx, sizeof(literal_t));
387 static literal_t *new_double_literal(parser_ctx_t *ctx, DOUBLE d)
389 literal_t *ret = parser_alloc(ctx, sizeof(literal_t));
391 ret->type = LT_DOUBLE;
396 literal_t *new_boolean_literal(parser_ctx_t *ctx, VARIANT_BOOL bval)
398 literal_t *ret = parser_alloc(ctx, sizeof(literal_t));
406 static int parse_double_literal(parser_ctx_t *ctx, LONG int_part, literal_t **literal)
411 if(ctx->ptr == ctx->end || (!isdigitW(*ctx->ptr) &&
412 *ctx->ptr!='.' && *ctx->ptr!='e' && *ctx->ptr!='E')) {
413 ERR("Illegal character\n");
418 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr)) {
419 hlp = d*10 + *(ctx->ptr++) - '0';
420 if(d>LONGLONG_MAX/10 || hlp<0) {
427 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr)) {
432 if(*ctx->ptr == '.') ctx->ptr++;
434 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr)) {
435 hlp = d*10 + *(ctx->ptr++) - '0';
436 if(d>LONGLONG_MAX/10 || hlp<0)
442 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr))
445 if(ctx->ptr < ctx->end && (*ctx->ptr == 'e' || *ctx->ptr == 'E')) {
449 if(ctx->ptr < ctx->end) {
450 if(*ctx->ptr == '+') {
452 }else if(*ctx->ptr == '-') {
455 }else if(!isdigitW(*ctx->ptr)) {
456 WARN("Expected exponent part\n");
457 return lex_error(ctx, E_FAIL);
461 if(ctx->ptr == ctx->end) {
462 WARN("unexpected end of file\n");
463 return lex_error(ctx, E_FAIL);
466 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr)) {
467 if(e > INT_MAX/10 || (e = e*10 + *ctx->ptr++ - '0')<0)
472 if(exp<0 && e<0 && e+exp>0) exp = INT_MIN;
473 else if(exp>0 && e>0 && e+exp<0) exp = INT_MAX;
477 *literal = new_double_literal(ctx, (DOUBLE)d*pow(10, exp));
478 return tNumericLiteral;
481 static int parse_numeric_literal(parser_ctx_t *ctx, literal_t **literal)
485 l = *ctx->ptr++ - '0';
486 if(ctx->ptr == ctx->end) {
487 *literal = new_int_literal(ctx, l);
488 return tNumericLiteral;
492 if(*ctx->ptr == 'x' || *ctx->ptr == 'X') {
493 if(++ctx->ptr == ctx->end) {
494 ERR("unexpexted end of file\n");
498 while(ctx->ptr < ctx->end && (d = hex_to_int(*ctx->ptr)) != -1) {
503 if(ctx->ptr < ctx->end && is_identifier_char(*ctx->ptr)) {
504 WARN("unexpected identifier char\n");
505 return lex_error(ctx, E_FAIL);
508 *literal = new_int_literal(ctx, l);
509 return tNumericLiteral;
512 if(isdigitW(*ctx->ptr) || is_identifier_char(*ctx->ptr)) {
513 WARN("wrong char after zero\n");
514 return lex_error(ctx, E_FAIL);
517 *literal = new_int_literal(ctx, 0);
520 while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr))
522 d = l*10 + *(ctx->ptr)-'0';
524 /* Check for integer overflow */
525 if (l > INT_MAX/10 || d < 0)
526 return parse_double_literal(ctx, l, literal);
532 if(ctx->ptr < ctx->end) {
533 if(*ctx->ptr == '.' || *ctx->ptr == 'e' || *ctx->ptr == 'E')
534 return parse_double_literal(ctx, l, literal);
536 if(is_identifier_char(*ctx->ptr)) {
537 WARN("unexpected identifier char\n");
538 return lex_error(ctx, E_FAIL);
542 *literal = new_int_literal(ctx, l);
543 return tNumericLiteral;
546 static int next_token(parser_ctx_t *ctx, void *lval)
550 if(ctx->ptr == ctx->end)
552 }while(skip_comment(ctx) || skip_html_comment(ctx));
554 if(isalphaW(*ctx->ptr)) {
555 int ret = check_keywords(ctx, lval);
559 return parse_identifier(ctx, lval);
562 if(isdigitW(*ctx->ptr))
563 return parse_numeric_literal(ctx, lval);
579 *(const WCHAR**)lval = ctx->ptr++;
583 if(++ctx->ptr < ctx->end && isdigitW(*ctx->ptr))
584 return parse_double_literal(ctx, 0, lval);
588 if(++ctx->ptr == ctx->end) {
589 *(int*)lval = EXPR_LESS;
596 *(int*)lval = EXPR_LESSEQ;
599 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* <<= */
601 *(int*)lval = EXPR_ASSIGNLSHIFT;
604 *(int*)lval = EXPR_LSHIFT;
607 *(int*)lval = EXPR_LESS;
612 if(++ctx->ptr == ctx->end) { /* > */
613 *(int*)lval = EXPR_GREATER;
620 *(int*)lval = EXPR_GREATEREQ;
623 if(++ctx->ptr < ctx->end) {
624 if(*ctx->ptr == '=') { /* >>= */
626 *(int*)lval = EXPR_ASSIGNRSHIFT;
629 if(*ctx->ptr == '>') { /* >>> */
630 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* >>>= */
632 *(int*)lval = EXPR_ASSIGNRRSHIFT;
635 *(int*)lval = EXPR_RRSHIFT;
639 *(int*)lval = EXPR_RSHIFT;
642 *(int*)lval = EXPR_GREATER;
648 if(ctx->ptr < ctx->end) {
655 *(int*)lval = EXPR_ASSIGNADD;
663 if(ctx->ptr < ctx->end) {
665 case '-': /* -- or --> */
667 if(ctx->is_html && ctx->nl && ctx->ptr < ctx->end && *ctx->ptr == '>') {
674 *(int*)lval = EXPR_ASSIGNSUB;
681 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* *= */
683 *(int*)lval = EXPR_ASSIGNMUL;
689 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* %= */
691 *(int*)lval = EXPR_ASSIGNMOD;
697 if(++ctx->ptr < ctx->end) {
701 *(int*)lval = EXPR_ASSIGNAND;
711 if(++ctx->ptr < ctx->end) {
715 *(int*)lval = EXPR_ASSIGNOR;
725 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* ^= */
727 *(int*)lval = EXPR_ASSIGNXOR;
733 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* != */
734 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* !== */
736 *(int*)lval = EXPR_NOTEQEQ;
739 *(int*)lval = EXPR_NOTEQ;
745 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* == */
746 if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* === */
748 *(int*)lval = EXPR_EQEQ;
751 *(int*)lval = EXPR_EQ;
757 if(++ctx->ptr < ctx->end) {
758 if(*ctx->ptr == '=') { /* /= */
760 *(int*)lval = EXPR_ASSIGNDIV;
768 return parse_string_literal(ctx, lval, *ctx->ptr);
772 return parse_identifier(ctx, lval);
778 WARN("unexpected char '%c' %d\n", *ctx->ptr, *ctx->ptr);
788 struct _cc_var_t *next;
793 void release_cc(cc_ctx_t *cc)
795 cc_var_t *iter, *next;
797 for(iter = cc->vars; iter; iter = next) {
805 static BOOL add_cc_var(cc_ctx_t *cc, const WCHAR *name, cc_var_t *v)
812 new_v = heap_alloc(sizeof(cc_var_t) + (len+1)*sizeof(WCHAR));
816 memcpy(new_v, v, sizeof(*v));
817 memcpy(new_v->name, name, (len+1)*sizeof(WCHAR));
818 new_v->name_len = len;
819 new_v->next = cc->vars;
824 static cc_var_t *find_cc_var(cc_ctx_t *cc, const WCHAR *name, unsigned name_len)
828 for(iter = cc->vars; iter; iter = iter->next) {
829 if(iter->name_len == name_len && !memcmp(iter->name, name, name_len*sizeof(WCHAR)))
836 static int init_cc(parser_ctx_t *ctx)
841 static const WCHAR _win32W[] = {'_','w','i','n','3','2',0};
842 static const WCHAR _win64W[] = {'_','w','i','n','6','4',0};
843 static const WCHAR _x86W[] = {'_','x','8','6',0};
844 static const WCHAR _amd64W[] = {'_','a','m','d','6','4',0};
845 static const WCHAR _jscriptW[] = {'_','j','s','c','r','i','p','t',0};
846 static const WCHAR _jscript_buildW[] = {'_','j','s','c','r','i','p','t','_','b','u','i','l','d',0};
847 static const WCHAR _jscript_versionW[] = {'_','j','s','c','r','i','p','t','_','v','e','r','s','i','o','n',0};
852 cc = heap_alloc(sizeof(cc_ctx_t));
854 return lex_error(ctx, E_OUTOFMEMORY);
858 v.u.b = VARIANT_TRUE;
859 if(!add_cc_var(cc, _jscriptW, &v)
860 || !add_cc_var(cc, sizeof(void*) == 8 ? _win64W : _win32W, &v)
861 || !add_cc_var(cc, sizeof(void*) == 8 ? _amd64W : _x86W, &v)) {
863 return lex_error(ctx, E_OUTOFMEMORY);
867 v.u.n = JSCRIPT_BUILD_VERSION;
868 if(!add_cc_var(cc, _jscript_buildW, &v)) {
870 return lex_error(ctx, E_OUTOFMEMORY);
873 v.u.n = JSCRIPT_MAJOR_VERSION + (DOUBLE)JSCRIPT_MINOR_VERSION/10.0;
874 if(!add_cc_var(cc, _jscript_versionW, &v)) {
876 return lex_error(ctx, E_OUTOFMEMORY);
879 ctx->script->cc = cc;
883 static int cc_token(parser_ctx_t *ctx, void *lval)
888 static const WCHAR cc_onW[] = {'c','c','_','o','n',0};
889 static const WCHAR setW[] = {'s','e','t',0};
890 static const WCHAR elifW[] = {'e','l','i','f',0};
891 static const WCHAR endW[] = {'e','n','d',0};
895 if(!check_keyword(ctx, cc_onW, NULL))
898 if(!check_keyword(ctx, setW, NULL)) {
899 FIXME("@set not implemented\n");
900 return lex_error(ctx, E_NOTIMPL);
903 if(!check_keyword(ctx, ifW, NULL)) {
904 FIXME("@if not implemented\n");
905 return lex_error(ctx, E_NOTIMPL);
908 if(!check_keyword(ctx, elifW, NULL)) {
909 FIXME("@elif not implemented\n");
910 return lex_error(ctx, E_NOTIMPL);
913 if(!check_keyword(ctx, elseW, NULL)) {
914 FIXME("@else not implemented\n");
915 return lex_error(ctx, E_NOTIMPL);
918 if(!check_keyword(ctx, endW, NULL)) {
919 FIXME("@end not implemented\n");
920 return lex_error(ctx, E_NOTIMPL);
924 return lex_error(ctx, JS_E_DISABLED_CC);
926 while(ctx->ptr+id_len < ctx->end && is_identifier_char(ctx->ptr[id_len]))
931 TRACE("var %s\n", debugstr_wn(ctx->ptr, id_len));
933 var = find_cc_var(ctx->script->cc, ctx->ptr, id_len);
935 if(!var || var->is_num) {
936 *(literal_t**)lval = new_double_literal(ctx, var ? var->u.n : ret_nan());
937 return tNumericLiteral;
940 *(literal_t**)lval = new_boolean_literal(ctx, var->u.b);
941 return tBooleanLiteral;
944 int parser_lex(void *lval, parser_ctx_t *ctx)
948 ctx->nl = ctx->ptr == ctx->begin;
951 ret = next_token(ctx, lval);
952 } while(ret == '@' && !(ret = cc_token(ctx, lval)));
957 literal_t *parse_regexp(parser_ctx_t *ctx)
959 const WCHAR *re, *flags_ptr;
966 while(*ctx->ptr != '/')
970 while(ctx->ptr < ctx->end && *ctx->ptr != '/') {
971 if(*ctx->ptr++ == '\\' && ctx->ptr < ctx->end)
975 if(ctx->ptr == ctx->end) {
976 WARN("unexpected end of file\n");
980 re_len = ctx->ptr-re;
982 flags_ptr = ++ctx->ptr;
983 while(ctx->ptr < ctx->end && isalnumW(*ctx->ptr))
986 hres = parse_regexp_flags(flags_ptr, ctx->ptr-flags_ptr, &flags);
990 ret = parser_alloc(ctx, sizeof(literal_t));
991 ret->type = LT_REGEXP;
992 ret->u.regexp.str = re;
993 ret->u.regexp.str_len = re_len;
994 ret->u.regexp.flags = flags;