96 lines
2.4 KiB
C++
96 lines
2.4 KiB
C++
/*
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Copyright (c) 2013-2014, Matthias Schiffer <mschiffer@universe-factory.net>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "parser.hpp"
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#include <cstdio>
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#include <cstring>
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namespace solar {
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struct location_t {
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public:
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int first_line;
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int first_column;
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int last_line;
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int last_column;
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location_t() : first_line(1), first_column(0), last_line(1), last_column(0) {}
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};
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class lex_t {
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private:
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location_t loc;
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std::FILE *file;
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bool needspace;
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size_t start;
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size_t end;
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size_t tok_len;
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char buffer[1024];
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bool advance();
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bool next(bool move);
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void consume(bool needspace);
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int io_error(value_t *value);
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int syntax_error(value_t *value);
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int consume_comment(value_t *value);
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int unterminated_string(value_t *value);
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int lex_string(value_t *value);
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int lex_address(value_t *value);
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int lex_float(value_t *value);
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int lex_number(value_t *value);
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int lex_keyword(value_t *value);
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int lex_symbol(value_t *value, bool terminal);
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char current() {
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return buffer[start + tok_len];
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}
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char * get_token() {
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return strndup(buffer+start, tok_len);
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}
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public:
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lex_t(FILE *file);
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int lex(value_t *value);
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const location_t & get_location() const {
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return loc;
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}
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};
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}
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