Merge WebKit at r75315: Initial merge by git.

Change-Id: I570314b346ce101c935ed22a626b48c2af266b84

1 files changed, 110 insertions, 0 deletions

diff --git a/Source/JavaScriptCore/runtime/LiteralParser.h b/Source/JavaScriptCore/runtime/LiteralParser.h
new file mode 100644
index 0000000..6df5d06
--- /dev/null
+++ b/Source/JavaScriptCore/runtime/LiteralParser.h
@@ -0,0 +1,110 @@
+/*
+ * Copyright (C) 2009 Apple Inc. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ */
+
+#ifndef LiteralParser_h
+#define LiteralParser_h
+
+#include "JSGlobalObjectFunctions.h"
+#include "JSValue.h"
+#include "UString.h"
+
+namespace JSC {
+
+    class LiteralParser {
+    public:
+        typedef enum { StrictJSON, NonStrictJSON } ParserMode;
+        LiteralParser(ExecState* exec, const UString& s, ParserMode mode)
+            : m_exec(exec)
+            , m_lexer(s, mode)
+            , m_mode(mode)
+        {
+        }
+        
+        JSValue tryLiteralParse()
+        {
+            m_lexer.next();
+            JSValue result = parse(m_mode == StrictJSON ? StartParseExpression : StartParseStatement);
+            if (m_lexer.currentToken().type != TokEnd)
+                return JSValue();
+            return result;
+        }
+    private:
+        enum ParserState { StartParseObject, StartParseArray, StartParseExpression, 
+                           StartParseStatement, StartParseStatementEndStatement, 
+                           DoParseObjectStartExpression, DoParseObjectEndExpression,
+                           DoParseArrayStartExpression, DoParseArrayEndExpression };
+        enum TokenType { TokLBracket, TokRBracket, TokLBrace, TokRBrace, 
+                         TokString, TokIdentifier, TokNumber, TokColon, 
+                         TokLParen, TokRParen, TokComma, TokTrue, TokFalse,
+                         TokNull, TokEnd, TokError };
+
+        class Lexer {
+        public:
+            struct LiteralParserToken {
+                TokenType type;
+                const UChar* start;
+                const UChar* end;
+                UString stringToken;
+                double numberToken;
+            };
+            Lexer(const UString& s, ParserMode mode)
+                : m_string(s)
+                , m_mode(mode)
+                , m_ptr(s.characters())
+                , m_end(s.characters() + s.length())
+            {
+            }
+            
+            TokenType next()
+            {
+                return lex(m_currentToken);
+            }
+            
+            const LiteralParserToken& currentToken()
+            {
+                return m_currentToken;
+            }
+            
+        private:
+            TokenType lex(LiteralParserToken&);
+            template <ParserMode mode> TokenType lexString(LiteralParserToken&);
+            TokenType lexNumber(LiteralParserToken&);
+            LiteralParserToken m_currentToken;
+            UString m_string;
+            ParserMode m_mode;
+            const UChar* m_ptr;
+            const UChar* m_end;
+        };
+        
+        class StackGuard;
+        JSValue parse(ParserState);
+
+        ExecState* m_exec;
+        LiteralParser::Lexer m_lexer;
+        ParserMode m_mode;
+    };
+}
+
+#endif