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-rw-r--r--lex.hpp96
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-/*
- Copyright (c) 2013-2014, Matthias Schiffer <mschiffer@universe-factory.net>
- 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 THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER 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.
-*/
-
-
-#pragma once
-
-#include "parser.hpp"
-
-#include <cstdio>
-#include <cstring>
-
-
-namespace solar {
-
-struct location_t {
-public:
- int first_line;
- int first_column;
- int last_line;
- int last_column;
-
- location_t() : first_line(1), first_column(0), last_line(1), last_column(0) {}
-};
-
-class lex_t {
-private:
- location_t loc;
-
- std::FILE *file;
-
- bool needspace;
-
- size_t start;
- size_t end;
- size_t tok_len;
- char buffer[1024];
-
-
- bool advance();
- bool next(bool move);
- void consume(bool needspace);
-
- int io_error(value_t *value);
- int syntax_error(value_t *value);
- int consume_comment(value_t *value);
- int unterminated_string(value_t *value);
-
- int lex_string(value_t *value);
- int lex_address(value_t *value);
- int lex_float(value_t *value);
- int lex_number(value_t *value);
- int lex_keyword(value_t *value);
- int lex_symbol(value_t *value, bool terminal);
-
- char current() {
- return buffer[start + tok_len];
- }
-
- char * get_token() {
- return strndup(buffer+start, tok_len);
- }
-
-
-public:
- lex_t(FILE *file);
-
- int lex(value_t *value);
-
- const location_t & get_location() const {
- return loc;
- }
-};
-
-}