763 lines
19 KiB
C
763 lines
19 KiB
C
/*
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* Copyright 2008 Jacek Caban for CodeWeavers
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include <math.h>
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#include "jscript.h"
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#include "activscp.h"
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#include "objsafe.h"
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#include "engine.h"
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#include "parser.tab.h"
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#include "wine/debug.h"
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#include "wine/unicode.h"
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WINE_DEFAULT_DEBUG_CHANNEL(jscript);
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static const WCHAR breakW[] = {'b','r','e','a','k',0};
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static const WCHAR caseW[] = {'c','a','s','e',0};
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static const WCHAR catchW[] = {'c','a','t','c','h',0};
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static const WCHAR continueW[] = {'c','o','n','t','i','n','u','e',0};
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static const WCHAR defaultW[] = {'d','e','f','a','u','l','t',0};
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static const WCHAR deleteW[] = {'d','e','l','e','t','e',0};
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static const WCHAR doW[] = {'d','o',0};
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static const WCHAR elseW[] = {'e','l','s','e',0};
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static const WCHAR falseW[] = {'f','a','l','s','e',0};
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static const WCHAR finallyW[] = {'f','i','n','a','l','l','y',0};
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static const WCHAR forW[] = {'f','o','r',0};
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static const WCHAR functionW[] = {'f','u','n','c','t','i','o','n',0};
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static const WCHAR ifW[] = {'i','f',0};
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static const WCHAR inW[] = {'i','n',0};
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static const WCHAR instanceofW[] = {'i','n','s','t','a','n','c','e','o','f',0};
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static const WCHAR newW[] = {'n','e','w',0};
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static const WCHAR nullW[] = {'n','u','l','l',0};
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static const WCHAR returnW[] = {'r','e','t','u','r','n',0};
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static const WCHAR switchW[] = {'s','w','i','t','c','h',0};
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static const WCHAR thisW[] = {'t','h','i','s',0};
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static const WCHAR throwW[] = {'t','h','r','o','w',0};
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static const WCHAR trueW[] = {'t','r','u','e',0};
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static const WCHAR tryW[] = {'t','r','y',0};
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static const WCHAR typeofW[] = {'t','y','p','e','o','f',0};
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static const WCHAR undefinedW[] = {'u','n','d','e','f','i','n','e','d',0};
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static const WCHAR varW[] = {'v','a','r',0};
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static const WCHAR voidW[] = {'v','o','i','d',0};
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static const WCHAR whileW[] = {'w','h','i','l','e',0};
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static const WCHAR withW[] = {'w','i','t','h',0};
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static const struct {
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const WCHAR *word;
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int token;
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} keywords[] = {
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{breakW, kBREAK},
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{caseW, kCASE},
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{catchW, kCATCH},
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{continueW, kCONTINUE},
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{defaultW, kDEFAULT},
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{deleteW, kDELETE},
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{doW, kDO},
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{elseW, kELSE},
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{falseW, kFALSE},
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{finallyW, kFINALLY},
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{forW, kFOR},
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{functionW, kFUNCTION},
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{ifW, kIF},
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{inW, kIN},
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{instanceofW, kINSTANCEOF},
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{newW, kNEW},
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{nullW, kNULL},
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{returnW, kRETURN},
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{switchW, kSWITCH},
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{thisW, kTHIS},
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{throwW, kTHROW},
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{trueW, kTRUE},
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{tryW, kTRY},
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{typeofW, kTYPEOF},
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{undefinedW, kUNDEFINED},
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{varW, kVAR},
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{voidW, kVOID},
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{whileW, kWHILE},
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{withW, kWITH}
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};
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static int lex_error(parser_ctx_t *ctx, HRESULT hres)
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{
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ctx->hres = hres;
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return -1;
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}
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static int check_keyword(parser_ctx_t *ctx, const WCHAR *word, const WCHAR **lval)
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{
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const WCHAR *p1 = ctx->ptr;
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const WCHAR *p2 = word;
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while(p1 < ctx->end && *p2) {
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if(*p1 != *p2)
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return *p1 - *p2;
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p1++;
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p2++;
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}
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if(*p2 || (p1 < ctx->end && isalnumW(*p1)))
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return 1;
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*lval = ctx->ptr;
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ctx->ptr = p1;
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return 0;
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}
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/* ECMA-262 3rd Edition 7.3 */
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static BOOL is_endline(WCHAR c)
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{
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return c == '\n' || c == '\r' || c == 0x2028 || c == 0x2029;
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}
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static BOOL is_identifier_char(WCHAR c)
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{
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return isalnumW(c) || c == '$' || c == '_' || c == '\\';
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}
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static int hex_to_int(WCHAR c)
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{
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if('0' <= c && c <= '9')
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return c-'0';
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if('a' <= c && c <= 'f')
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return c-'a'+10;
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if('A' <= c && c <= 'F')
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return c-'A'+10;
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return -1;
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}
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static int check_keywords(parser_ctx_t *ctx, const WCHAR **lval)
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{
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int min = 0, max = sizeof(keywords)/sizeof(keywords[0])-1, r, i;
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while(min <= max) {
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i = (min+max)/2;
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r = check_keyword(ctx, keywords[i].word, lval);
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if(!r)
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return keywords[i].token;
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if(r > 0)
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min = i+1;
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else
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max = i-1;
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}
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return 0;
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}
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static void skip_spaces(parser_ctx_t *ctx)
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{
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while(ctx->ptr < ctx->end && isspaceW(*ctx->ptr)) {
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if(is_endline(*ctx->ptr++))
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ctx->nl = TRUE;
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}
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}
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static BOOL skip_html_comment(parser_ctx_t *ctx)
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{
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const WCHAR html_commentW[] = {'<','!','-','-',0};
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if(!ctx->is_html || ctx->ptr+3 >= ctx->end ||
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memcmp(ctx->ptr, html_commentW, sizeof(WCHAR)*4))
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return FALSE;
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ctx->nl = TRUE;
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while(ctx->ptr < ctx->end && !is_endline(*ctx->ptr++));
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return TRUE;
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}
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static BOOL skip_comment(parser_ctx_t *ctx)
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{
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if(ctx->ptr+1 >= ctx->end || *ctx->ptr != '/')
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return FALSE;
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switch(ctx->ptr[1]) {
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case '*':
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ctx->ptr += 2;
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while(ctx->ptr+1 < ctx->end && (ctx->ptr[0] != '*' || ctx->ptr[1] != '/'))
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ctx->ptr++;
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if(ctx->ptr[0] == '*' && ctx->ptr[1] == '/') {
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ctx->ptr += 2;
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}else {
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WARN("unexpected end of file (missing end of comment)\n");
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ctx->ptr = ctx->end;
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}
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break;
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case '/':
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ctx->ptr += 2;
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while(ctx->ptr < ctx->end && !is_endline(*ctx->ptr))
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ctx->ptr++;
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break;
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default:
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return FALSE;
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}
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return TRUE;
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}
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static BOOL unescape(WCHAR *str)
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{
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WCHAR *pd, *p, c;
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int i;
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pd = p = str;
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while(*p) {
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if(*p != '\\') {
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*pd++ = *p++;
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continue;
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}
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p++;
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c = 0;
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switch(*p) {
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case '\'':
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case '\"':
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case '\\':
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c = *p;
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break;
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case 'b':
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c = '\b';
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break;
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case 't':
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c = '\t';
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break;
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case 'n':
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c = '\n';
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break;
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case 'v':
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c = '\v';
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break;
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case 'f':
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c = '\f';
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break;
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case 'r':
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c = '\r';
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break;
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case 'x':
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i = hex_to_int(*++p);
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if(i == -1)
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return FALSE;
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c = i << 4;
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i = hex_to_int(*++p);
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if(i == -1)
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return FALSE;
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c += i;
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break;
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case 'u':
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i = hex_to_int(*++p);
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if(i == -1)
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return FALSE;
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c = i << 12;
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i = hex_to_int(*++p);
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if(i == -1)
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return FALSE;
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c += i << 8;
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i = hex_to_int(*++p);
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if(i == -1)
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return FALSE;
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c += 1 << 4;
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i = hex_to_int(*++p);
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if(i == -1)
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return FALSE;
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c += i;
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break;
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default:
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if(isdigitW(*p)) {
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c = *p++ - '0';
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while(isdigitW(*p))
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c = c*10 + (*p++ - '0');
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*pd++ = c;
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continue;
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}
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c = *p;
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}
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*pd++ = c;
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p++;
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}
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*pd = 0;
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return TRUE;
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}
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static int parse_identifier(parser_ctx_t *ctx, const WCHAR **ret)
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{
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const WCHAR *ptr = ctx->ptr++;
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WCHAR *wstr;
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int len;
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while(ctx->ptr < ctx->end && is_identifier_char(*ctx->ptr))
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ctx->ptr++;
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len = ctx->ptr-ptr;
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*ret = wstr = parser_alloc(ctx, (len+1)*sizeof(WCHAR));
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memcpy(wstr, ptr, (len+1)*sizeof(WCHAR));
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wstr[len] = 0;
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/* FIXME: unescape */
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return tIdentifier;
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}
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static int parse_string_literal(parser_ctx_t *ctx, const WCHAR **ret, WCHAR endch)
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{
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const WCHAR *ptr = ++ctx->ptr;
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WCHAR *wstr;
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int len;
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while(ctx->ptr < ctx->end && *ctx->ptr != endch) {
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if(*ctx->ptr++ == '\\')
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ctx->ptr++;
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}
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if(ctx->ptr == ctx->end) {
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WARN("unexpected end of file\n");
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return lex_error(ctx, E_FAIL);
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}
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len = ctx->ptr-ptr;
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*ret = wstr = parser_alloc(ctx, (len+1)*sizeof(WCHAR));
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memcpy(wstr, ptr, (len+1)*sizeof(WCHAR));
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wstr[len] = 0;
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ctx->ptr++;
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if(!unescape(wstr)) {
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WARN("unescape failed\n");
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return lex_error(ctx, E_FAIL);
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}
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return tStringLiteral;
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}
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static literal_t *alloc_int_literal(parser_ctx_t *ctx, LONG l)
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{
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literal_t *ret = parser_alloc(ctx, sizeof(literal_t));
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ret->vt = VT_I4;
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ret->u.lval = l;
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return ret;
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}
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static int parse_double_literal(parser_ctx_t *ctx, LONG int_part, literal_t **literal)
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{
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double d, tmp = 1.0;
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if(ctx->ptr == ctx->end || !isdigitW(*ctx->ptr)) {
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ERR("No digit after point\n");
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return 0;
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}
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d = int_part;
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while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr))
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d += (tmp /= 10.0)*(*ctx->ptr++ - '0');
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if(ctx->ptr < ctx->end && (*ctx->ptr == 'e' || *ctx->ptr == 'E')) {
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int sign = 1, e = 0;
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ctx->ptr++;
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if(ctx->ptr < ctx->end) {
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if(*ctx->ptr == '+') {
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ctx->ptr++;
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}else if(*ctx->ptr == '-') {
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sign = -1;
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ctx->ptr++;
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}else if(!isdigitW(*ctx->ptr)) {
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WARN("Expected exponent part\n");
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return lex_error(ctx, E_FAIL);
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}
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}
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if(ctx->ptr == ctx->end) {
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WARN("unexpected end of file\n");
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return lex_error(ctx, E_FAIL);
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}
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while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr))
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e = e*10 + *ctx->ptr++ - '0';
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e *= sign;
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d *= pow(10, e);
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}
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*literal = parser_alloc(ctx, sizeof(literal_t));
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(*literal)->vt = VT_R8;
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(*literal)->u.dval = d;
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return tNumericLiteral;
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}
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static int parse_numeric_literal(parser_ctx_t *ctx, literal_t **literal)
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{
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LONG l, d;
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l = *ctx->ptr++ - '0';
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if(ctx->ptr == ctx->end) {
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*literal = alloc_int_literal(ctx, l);
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return tNumericLiteral;
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}
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if(!l) {
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if(*ctx->ptr == 'x' || *ctx->ptr == 'X') {
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if(++ctx->ptr == ctx->end) {
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ERR("unexpexted end of file\n");
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return 0;
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}
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while(ctx->ptr < ctx->end && (d = hex_to_int(*ctx->ptr)) != -1) {
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l = l*16 + d;
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ctx->ptr++;
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}
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if(ctx->ptr < ctx->end && is_identifier_char(*ctx->ptr)) {
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WARN("unexpected identifier char\n");
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return lex_error(ctx, E_FAIL);
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}
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*literal = alloc_int_literal(ctx, l);
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return tNumericLiteral;
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}
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if(isdigitW(*ctx->ptr) || is_identifier_char(*ctx->ptr)) {
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WARN("wrong char after zero\n");
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return lex_error(ctx, E_FAIL);
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}
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*literal = alloc_int_literal(ctx, 0);
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}
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while(ctx->ptr < ctx->end && isdigitW(*ctx->ptr))
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l = l*10 + *(ctx->ptr++)-'0';
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if(ctx->ptr < ctx->end) {
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if(*ctx->ptr == '.') {
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ctx->ptr++;
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return parse_double_literal(ctx, l, literal);
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}
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if(is_identifier_char(*ctx->ptr)) {
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WARN("unexpected identifier char\n");
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return lex_error(ctx, E_FAIL);
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}
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}
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*literal = alloc_int_literal(ctx, l);
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return tNumericLiteral;
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}
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int parser_lex(void *lval, parser_ctx_t *ctx)
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{
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int ret;
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ctx->nl = ctx->ptr == ctx->begin;
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do {
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skip_spaces(ctx);
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if(ctx->ptr == ctx->end)
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return 0;
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}while(skip_comment(ctx) || skip_html_comment(ctx));
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if(isalphaW(*ctx->ptr)) {
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ret = check_keywords(ctx, lval);
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if(ret)
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return ret;
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return parse_identifier(ctx, lval);
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}
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if(isdigitW(*ctx->ptr))
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return parse_numeric_literal(ctx, lval);
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switch(*ctx->ptr) {
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case '{':
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case '(':
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case ')':
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case '[':
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case ']':
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case ';':
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case ',':
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case '~':
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case '?':
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case ':':
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return *ctx->ptr++;
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case '}':
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*(const WCHAR**)lval = ctx->ptr++;
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return '}';
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case '.':
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if(++ctx->ptr < ctx->end && isdigitW(*ctx->ptr))
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return parse_double_literal(ctx, 0, lval);
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return '.';
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case '<':
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if(++ctx->ptr == ctx->end) {
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*(int*)lval = EXPR_LESS;
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return tRelOper;
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}
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switch(*ctx->ptr) {
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case '=': /* <= */
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ctx->ptr++;
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*(int*)lval = EXPR_LESSEQ;
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return tRelOper;
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case '<': /* << */
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if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* <<= */
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ctx->ptr++;
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*(int*)lval = EXPR_ASSIGNLSHIFT;
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return tAssignOper;
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}
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*(int*)lval = EXPR_LSHIFT;
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return tShiftOper;
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default: /* < */
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*(int*)lval = EXPR_LESS;
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return tRelOper;
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}
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case '>':
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if(++ctx->ptr == ctx->end) { /* > */
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*(int*)lval = EXPR_GREATER;
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return tRelOper;
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}
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switch(*ctx->ptr) {
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case '=': /* >= */
|
|
ctx->ptr++;
|
|
*(int*)lval = EXPR_GREATEREQ;
|
|
return tRelOper;
|
|
case '>': /* >> */
|
|
if(++ctx->ptr < ctx->end) {
|
|
if(*ctx->ptr == '=') { /* >>= */
|
|
ctx->ptr++;
|
|
*(int*)lval = EXPR_ASSIGNRSHIFT;
|
|
return tAssignOper;
|
|
}
|
|
if(*ctx->ptr == '>') { /* >>> */
|
|
if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* >>>= */
|
|
ctx->ptr++;
|
|
*(int*)lval = EXPR_ASSIGNRRSHIFT;
|
|
return tAssignOper;
|
|
}
|
|
*(int*)lval = EXPR_RRSHIFT;
|
|
return tRelOper;
|
|
}
|
|
}
|
|
*(int*)lval = EXPR_RSHIFT;
|
|
return tShiftOper;
|
|
default:
|
|
*(int*)lval = EXPR_GREATER;
|
|
return tRelOper;
|
|
}
|
|
|
|
case '+':
|
|
ctx->ptr++;
|
|
if(ctx->ptr < ctx->end) {
|
|
switch(*ctx->ptr) {
|
|
case '+': /* ++ */
|
|
ctx->ptr++;
|
|
return tINC;
|
|
case '=': /* += */
|
|
ctx->ptr++;
|
|
*(int*)lval = EXPR_ASSIGNADD;
|
|
return tAssignOper;
|
|
}
|
|
}
|
|
return '+';
|
|
|
|
case '-':
|
|
ctx->ptr++;
|
|
if(ctx->ptr < ctx->end) {
|
|
switch(*ctx->ptr) {
|
|
case '-': /* -- or --> */
|
|
ctx->ptr++;
|
|
if(ctx->is_html && ctx->nl && ctx->ptr < ctx->end && *ctx->ptr == '>') {
|
|
ctx->ptr++;
|
|
return tHTMLCOMMENT;
|
|
}
|
|
return tDEC;
|
|
case '=': /* -= */
|
|
ctx->ptr++;
|
|
*(int*)lval = EXPR_ASSIGNSUB;
|
|
return tAssignOper;
|
|
}
|
|
}
|
|
return '-';
|
|
|
|
case '*':
|
|
if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* *= */
|
|
ctx->ptr++;
|
|
*(int*)lval = EXPR_ASSIGNMUL;
|
|
return tAssignOper;
|
|
}
|
|
return '*';
|
|
|
|
case '%':
|
|
if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* %= */
|
|
ctx->ptr++;
|
|
*(int*)lval = EXPR_ASSIGNMOD;
|
|
return tAssignOper;
|
|
}
|
|
return '%';
|
|
|
|
case '&':
|
|
if(++ctx->ptr < ctx->end) {
|
|
switch(*ctx->ptr) {
|
|
case '=': /* &= */
|
|
ctx->ptr++;
|
|
*(int*)lval = EXPR_ASSIGNAND;
|
|
return tAssignOper;
|
|
case '&': /* && */
|
|
ctx->ptr++;
|
|
return tANDAND;
|
|
}
|
|
}
|
|
return '&';
|
|
|
|
case '|':
|
|
if(++ctx->ptr < ctx->end) {
|
|
switch(*ctx->ptr) {
|
|
case '=': /* |= */
|
|
ctx->ptr++;
|
|
*(int*)lval = EXPR_ASSIGNOR;
|
|
return tAssignOper;
|
|
case '|': /* || */
|
|
ctx->ptr++;
|
|
return tOROR;
|
|
}
|
|
}
|
|
return '|';
|
|
|
|
case '^':
|
|
if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* ^= */
|
|
ctx->ptr++;
|
|
*(int*)lval = EXPR_ASSIGNXOR;
|
|
return tAssignOper;
|
|
}
|
|
return '^';
|
|
|
|
case '!':
|
|
if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* != */
|
|
if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* !== */
|
|
ctx->ptr++;
|
|
*(int*)lval = EXPR_NOTEQEQ;
|
|
return tEqOper;
|
|
}
|
|
*(int*)lval = EXPR_NOTEQ;
|
|
return tEqOper;
|
|
}
|
|
return '!';
|
|
|
|
case '=':
|
|
if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* == */
|
|
if(++ctx->ptr < ctx->end && *ctx->ptr == '=') { /* === */
|
|
ctx->ptr++;
|
|
*(int*)lval = EXPR_EQEQ;
|
|
return tEqOper;
|
|
}
|
|
*(int*)lval = EXPR_EQ;
|
|
return tEqOper;
|
|
}
|
|
return '=';
|
|
|
|
case '/':
|
|
if(++ctx->ptr < ctx->end) {
|
|
if(*ctx->ptr == '=') { /* /= */
|
|
ctx->ptr++;
|
|
*(int*)lval = EXPR_ASSIGNDIV;
|
|
return tAssignOper;
|
|
}
|
|
}
|
|
return '/';
|
|
|
|
case '\"':
|
|
case '\'':
|
|
return parse_string_literal(ctx, lval, *ctx->ptr);
|
|
|
|
case '_':
|
|
case '$':
|
|
return parse_identifier(ctx, lval);
|
|
}
|
|
|
|
WARN("unexpected char '%c' %d\n", *ctx->ptr, *ctx->ptr);
|
|
return 0;
|
|
}
|
|
|
|
static void add_object_literal(parser_ctx_t *ctx, DispatchEx *obj)
|
|
{
|
|
obj_literal_t *literal = parser_alloc(ctx, sizeof(obj_literal_t));
|
|
|
|
literal->obj = obj;
|
|
literal->next = ctx->obj_literals;
|
|
ctx->obj_literals = literal;
|
|
}
|
|
|
|
literal_t *parse_regexp(parser_ctx_t *ctx)
|
|
{
|
|
const WCHAR *re, *flags;
|
|
DispatchEx *regexp;
|
|
literal_t *ret;
|
|
DWORD re_len;
|
|
HRESULT hres;
|
|
|
|
TRACE("\n");
|
|
|
|
re = ctx->ptr;
|
|
while(ctx->ptr < ctx->end && *ctx->ptr != '/') {
|
|
if(*ctx->ptr++ == '\\' && ctx->ptr < ctx->end)
|
|
ctx->ptr++;
|
|
}
|
|
|
|
if(ctx->ptr == ctx->end) {
|
|
WARN("unexpected end of file\n");
|
|
return NULL;
|
|
}
|
|
|
|
re_len = ctx->ptr-re;
|
|
|
|
flags = ++ctx->ptr;
|
|
while(ctx->ptr < ctx->end && isalnumW(*ctx->ptr))
|
|
ctx->ptr++;
|
|
|
|
hres = create_regexp_str(ctx->script, re, re_len, flags, ctx->ptr-flags, ®exp);
|
|
if(FAILED(hres))
|
|
return NULL;
|
|
|
|
add_object_literal(ctx, regexp);
|
|
|
|
ret = parser_alloc(ctx, sizeof(literal_t));
|
|
ret->vt = VT_DISPATCH;
|
|
ret->u.disp = (IDispatch*)_IDispatchEx_(regexp);
|
|
return ret;
|
|
}
|