+ // The JSON RFC 4627 defines a list of allowed characters to be considered
+ // insignificant white space: http://www.ietf.org/rfc/rfc4627.txt (2. JSON Grammar).
+ return c == ' ' || c == 0x9 || c == 0xA || c == 0xD;
+}
+
+template <typename CharType>
+bool LiteralParser<CharType>::tryJSONPParse(Vector<JSONPData>& results, bool needsFullSourceInfo)
+{
+ if (m_lexer.next() != TokIdentifier)
+ return false;
+ do {
+ Vector<JSONPPathEntry> path;
+ // Unguarded next to start off the lexer
+ Identifier name = Identifier(&m_exec->vm(), m_lexer.currentToken().start, m_lexer.currentToken().end - m_lexer.currentToken().start);
+ JSONPPathEntry entry;
+ if (name == m_exec->vm().propertyNames->varKeyword) {
+ if (m_lexer.next() != TokIdentifier)
+ return false;
+ entry.m_type = JSONPPathEntryTypeDeclare;
+ entry.m_pathEntryName = Identifier(&m_exec->vm(), m_lexer.currentToken().start, m_lexer.currentToken().end - m_lexer.currentToken().start);
+ path.append(entry);
+ } else {
+ entry.m_type = JSONPPathEntryTypeDot;
+ entry.m_pathEntryName = Identifier(&m_exec->vm(), m_lexer.currentToken().start, m_lexer.currentToken().end - m_lexer.currentToken().start);
+ path.append(entry);
+ }
+ if (m_exec->vm().keywords->isKeyword(entry.m_pathEntryName))
+ return false;
+ TokenType tokenType = m_lexer.next();
+ if (entry.m_type == JSONPPathEntryTypeDeclare && tokenType != TokAssign)
+ return false;
+ while (tokenType != TokAssign) {
+ switch (tokenType) {
+ case TokLBracket: {
+ entry.m_type = JSONPPathEntryTypeLookup;
+ if (m_lexer.next() != TokNumber)
+ return false;
+ double doubleIndex = m_lexer.currentToken().numberToken;
+ int index = (int)doubleIndex;
+ if (index != doubleIndex || index < 0)
+ return false;
+ entry.m_pathIndex = index;
+ if (m_lexer.next() != TokRBracket)
+ return false;
+ break;
+ }
+ case TokDot: {
+ entry.m_type = JSONPPathEntryTypeDot;
+ if (m_lexer.next() != TokIdentifier)
+ return false;
+ entry.m_pathEntryName = Identifier(&m_exec->vm(), m_lexer.currentToken().start, m_lexer.currentToken().end - m_lexer.currentToken().start);
+ break;
+ }
+ case TokLParen: {
+ if (path.last().m_type != JSONPPathEntryTypeDot || needsFullSourceInfo)
+ return false;
+ path.last().m_type = JSONPPathEntryTypeCall;
+ entry = path.last();
+ goto startJSON;
+ }
+ default:
+ return false;
+ }
+ path.append(entry);
+ tokenType = m_lexer.next();
+ }
+ startJSON:
+ m_lexer.next();
+ results.append(JSONPData());
+ results.last().m_value.set(m_exec->vm(), parse(StartParseExpression));
+ if (!results.last().m_value)
+ return false;
+ results.last().m_path.swap(path);
+ if (entry.m_type == JSONPPathEntryTypeCall) {
+ if (m_lexer.currentToken().type != TokRParen)
+ return false;
+ m_lexer.next();
+ }
+ if (m_lexer.currentToken().type != TokSemi)
+ break;
+ m_lexer.next();
+ } while (m_lexer.currentToken().type == TokIdentifier);
+ return m_lexer.currentToken().type == TokEnd;
+}
+
+template <typename CharType>
+ALWAYS_INLINE const Identifier LiteralParser<CharType>::makeIdentifier(const LChar* characters, size_t length)
+{
+ if (!length)
+ return m_exec->vm().propertyNames->emptyIdentifier;
+ if (characters[0] >= MaximumCachableCharacter)
+ return Identifier(&m_exec->vm(), characters, length);
+
+ if (length == 1) {
+ if (!m_shortIdentifiers[characters[0]].isNull())
+ return m_shortIdentifiers[characters[0]];
+ m_shortIdentifiers[characters[0]] = Identifier(&m_exec->vm(), characters, length);
+ return m_shortIdentifiers[characters[0]];
+ }
+ if (!m_recentIdentifiers[characters[0]].isNull() && Identifier::equal(m_recentIdentifiers[characters[0]].impl(), characters, length))
+ return m_recentIdentifiers[characters[0]];
+ m_recentIdentifiers[characters[0]] = Identifier(&m_exec->vm(), characters, length);
+ return m_recentIdentifiers[characters[0]];
+}
+
+template <typename CharType>
+ALWAYS_INLINE const Identifier LiteralParser<CharType>::makeIdentifier(const UChar* characters, size_t length)
+{
+ if (!length)
+ return m_exec->vm().propertyNames->emptyIdentifier;
+ if (characters[0] >= MaximumCachableCharacter)
+ return Identifier(&m_exec->vm(), characters, length);
+
+ if (length == 1) {
+ if (!m_shortIdentifiers[characters[0]].isNull())
+ return m_shortIdentifiers[characters[0]];
+ m_shortIdentifiers[characters[0]] = Identifier(&m_exec->vm(), characters, length);
+ return m_shortIdentifiers[characters[0]];
+ }
+ if (!m_recentIdentifiers[characters[0]].isNull() && Identifier::equal(m_recentIdentifiers[characters[0]].impl(), characters, length))
+ return m_recentIdentifiers[characters[0]];
+ m_recentIdentifiers[characters[0]] = Identifier(&m_exec->vm(), characters, length);
+ return m_recentIdentifiers[characters[0]];
+}
+
+template <typename CharType>
+template <ParserMode mode> TokenType LiteralParser<CharType>::Lexer::lex(LiteralParserToken<CharType>& token)
+{
+ while (m_ptr < m_end && isJSONWhiteSpace(*m_ptr))
projects / apple / javascriptcore.git / blobdiff