dvander@0: /*
dvander@0:  * Copyright (C) 2012 David Anderson
dvander@0:  *
dvander@0:  * This file is part of JITCraft.
dvander@0:  *
dvander@0:  * JITCraft is free software: you can redistribute it and/or modify it under
dvander@0:  * the terms of the GNU General Public License as published by the Free
dvander@0:  * Software Foundation, either version 3 of the License, or (at your option)
dvander@0:  * any later version.
dvander@0:  * 
dvander@0:  * Foobar is distributed in the hope that it will be useful, but WITHOUT ANY
dvander@0:  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
dvander@0:  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
dvander@0:  *
dvander@0:  * You should have received a copy of the GNU General Public License along with
dvander@0:  * JITCraft. If not, see http://www.gnu.org/licenses/.
dvander@0:  */
dvander@0: #ifndef _include_jitcraft_scanner_h_
dvander@0: #define _include_jitcraft_scanner_h_
dvander@0: 
dvander@0: #include <string>
dvander@0: #include "Token.h"
dvander@25: #include "CompileContext.h"
dvander@0: 
dvander@0: namespace jc {
dvander@0: 
dvander@0: class Scanner
dvander@0: {
dvander@25:     CompileContext &cc_;
dvander@0:     const char *stream_;
dvander@0:     size_t length_;
dvander@0:     bool pushed_;
dvander@0:     char saved_;
dvander@0:     const char *pos_;
dvander@0:     std::string literal_;
dvander@0:     TokenKind lastToken_;
dvander@25:     SourcePosition last_;
dvander@25:     SourcePosition cur_;
dvander@25:     SourcePosition begin_;
dvander@0: 
dvander@0:   private:
dvander@0:     char getChar();
dvander@0:     void putChar(char c);
dvander@0:     void eatSingleLine();
dvander@0:     bool eatComment();
dvander@25:     void calcNewLine(char c);
dvander@21:     int readEscapeCode();
dvander@21:     TokenKind stringLiteral();
dvander@4:     TokenKind numberLiteral(char first);
dvander@0:     TokenKind identifier(char first);
dvander@0: 
dvander@0:     TokenKind next();
dvander@0: 
dvander@0:   public:
dvander@25:     Scanner(CompileContext &cc, const char *stream, size_t length);
dvander@0: 
dvander@4:     static double ParseDouble(const char *string);
dvander@4: 
dvander@0:     TokenKind scan();
dvander@0:     TokenKind peek();
dvander@0:     TokenKind last() const {
dvander@0:         return lastToken_;
dvander@0:     }
dvander@0: 
dvander@25:     // Beginning source position of the last instruction.
dvander@25:     SourcePosition begin() const {
dvander@25:         return begin_;
dvander@25:     }
dvander@25: 
dvander@21:     // Note: the literal may have embedded NUL characters.
dvander@0:     const char *literal() const {
dvander@0:         return literal_.c_str();
dvander@0:     }
dvander@21:     size_t literal_length() const {
dvander@54:         return literal_.size();
dvander@21:     }
dvander@0: };
dvander@0: 
dvander@0: } // namespace jc
dvander@0: 
dvander@0: #endif // _include_jitcraft_scanner_h_