608 lines
16 KiB
C++
608 lines
16 KiB
C++
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//
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// Automated Testing Framework (atf)
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//
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// Copyright (c) 2007 The NetBSD Foundation, Inc.
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// All rights reserved.
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//
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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
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// are met:
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND
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// CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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// INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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// IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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// GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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// IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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// OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
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// IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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#if !defined(_ATF_CXX_PARSER_HPP_)
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#define _ATF_CXX_PARSER_HPP_
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#include <istream>
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#include <map>
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#include <ostream>
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#include <stdexcept>
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#include <string>
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#include <utility>
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#include <vector>
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namespace atf {
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namespace parser {
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// ------------------------------------------------------------------------
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// The "parse_error" class.
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// ------------------------------------------------------------------------
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class parse_error : public std::runtime_error,
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public std::pair< size_t, std::string > {
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mutable std::string m_msg;
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public:
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parse_error(size_t, std::string);
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~parse_error(void) throw();
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const char* what(void) const throw();
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operator std::string(void) const;
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};
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// ------------------------------------------------------------------------
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// The "parse_errors" class.
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// ------------------------------------------------------------------------
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class parse_errors : public std::runtime_error,
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public std::vector< parse_error > {
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std::vector< parse_error > m_errors;
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mutable std::string m_msg;
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public:
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parse_errors(void);
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~parse_errors(void) throw();
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const char* what(void) const throw();
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};
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// ------------------------------------------------------------------------
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// The "format_error" class.
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// ------------------------------------------------------------------------
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class format_error : public std::runtime_error {
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public:
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format_error(const std::string&);
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};
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// ------------------------------------------------------------------------
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// The "token" class.
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// ------------------------------------------------------------------------
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typedef int token_type;
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//!
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//! \brief Representation of a read token.
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//!
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//! A pair that contains the information of a token read from a stream.
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//! It contains the token's type and its associated data, if any.
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//!
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struct token {
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bool m_inited;
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size_t m_line;
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token_type m_type;
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std::string m_text;
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public:
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token(void);
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token(size_t, const token_type&, const std::string& = "");
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size_t lineno(void) const;
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const token_type& type(void) const;
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const std::string& text(void) const;
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operator bool(void) const;
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bool operator!(void) const;
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};
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// ------------------------------------------------------------------------
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// The "tokenizer" class.
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// ------------------------------------------------------------------------
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//!
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//! \brief A stream tokenizer.
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//!
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//! This template implements an extremely simple, line-oriented stream
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//! tokenizer. It is only able to recognize one character-long delimiters,
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//! random-length keywords, skip whitespace and, anything that does not
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//! match these rules is supposed to be a word.
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//!
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//! Parameter IS: The input stream's type.
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//!
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template< class IS >
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class tokenizer {
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IS& m_is;
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size_t m_lineno;
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token m_la;
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bool m_skipws;
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token_type m_eof_type, m_nl_type, m_text_type;
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std::map< char, token_type > m_delims_map;
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std::string m_delims_str;
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char m_quotech;
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token_type m_quotetype;
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std::map< std::string, token_type > m_keywords_map;
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token_type alloc_type(void);
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template< class TKZ >
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friend
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class parser;
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public:
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tokenizer(IS&, bool, const token_type&, const token_type&,
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const token_type&, size_t = 1);
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size_t lineno(void) const;
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void add_delim(char, const token_type&);
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void add_keyword(const std::string&, const token_type&);
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void add_quote(char, const token_type&);
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token next(void);
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std::string rest_of_line(void);
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};
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template< class IS >
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tokenizer< IS >::tokenizer(IS& p_is,
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bool p_skipws,
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const token_type& p_eof_type,
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const token_type& p_nl_type,
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const token_type& p_text_type,
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size_t p_lineno) :
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m_is(p_is),
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m_lineno(p_lineno),
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m_skipws(p_skipws),
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m_eof_type(p_eof_type),
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m_nl_type(p_nl_type),
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m_text_type(p_text_type),
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m_quotech(-1)
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{
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}
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template< class IS >
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size_t
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tokenizer< IS >::lineno(void)
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const
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{
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return m_lineno;
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}
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template< class IS >
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void
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tokenizer< IS >::add_delim(char delim, const token_type& type)
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{
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m_delims_map[delim] = type;
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m_delims_str += delim;
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}
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template< class IS >
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void
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tokenizer< IS >::add_keyword(const std::string& keyword,
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const token_type& type)
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{
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m_keywords_map[keyword] = type;
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}
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template< class IS >
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void
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tokenizer< IS >::add_quote(char ch, const token_type& type)
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{
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m_quotech = ch;
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m_quotetype = type;
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}
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template< class IS >
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token
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tokenizer< IS >::next(void)
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{
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if (m_la) {
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token t = m_la;
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m_la = token();
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if (t.type() == m_nl_type)
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m_lineno++;
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return t;
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}
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char ch;
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std::string text;
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bool done = false, quoted = false;
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token t(m_lineno, m_eof_type, "<<EOF>>");
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while (!done && m_is.get(ch).good()) {
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if (ch == m_quotech) {
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if (text.empty()) {
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bool escaped = false;
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while (!done && m_is.get(ch).good()) {
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if (!escaped) {
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if (ch == '\\')
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escaped = true;
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else if (ch == '\n') {
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m_la = token(m_lineno, m_nl_type, "<<NEWLINE>>");
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throw parse_error(t.lineno(),
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"Missing double quotes before "
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"end of line");
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} else if (ch == m_quotech)
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done = true;
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else
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text += ch;
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} else {
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text += ch;
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escaped = false;
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}
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}
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if (!m_is.good())
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throw parse_error(t.lineno(),
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"Missing double quotes before "
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"end of file");
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t = token(m_lineno, m_text_type, text);
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quoted = true;
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} else {
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m_is.putback(ch);
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done = true;
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}
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} else {
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typename std::map< char, token_type >::const_iterator idelim;
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idelim = m_delims_map.find(ch);
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if (idelim != m_delims_map.end()) {
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done = true;
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if (text.empty())
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t = token(m_lineno, (*idelim).second,
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std::string("") + ch);
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else
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m_is.putback(ch);
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} else if (ch == '\n') {
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done = true;
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if (text.empty())
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t = token(m_lineno, m_nl_type, "<<NEWLINE>>");
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else
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m_is.putback(ch);
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} else if (m_skipws && (ch == ' ' || ch == '\t')) {
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if (!text.empty())
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done = true;
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} else
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text += ch;
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}
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}
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if (!quoted && !text.empty()) {
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typename std::map< std::string, token_type >::const_iterator ikw;
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ikw = m_keywords_map.find(text);
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if (ikw != m_keywords_map.end())
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t = token(m_lineno, (*ikw).second, text);
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else
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t = token(m_lineno, m_text_type, text);
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}
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if (t.type() == m_nl_type)
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m_lineno++;
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return t;
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}
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template< class IS >
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std::string
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tokenizer< IS >::rest_of_line(void)
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{
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std::string str;
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while (m_is.good() && m_is.peek() != '\n')
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str += m_is.get();
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return str;
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}
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// ------------------------------------------------------------------------
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// The "parser" class.
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// ------------------------------------------------------------------------
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template< class TKZ >
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class parser {
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TKZ& m_tkz;
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token m_last;
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parse_errors m_errors;
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bool m_thrown;
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public:
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parser(TKZ& tkz);
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~parser(void);
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bool good(void) const;
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void add_error(const parse_error&);
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bool has_errors(void) const;
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token next(void);
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std::string rest_of_line(void);
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token reset(const token_type&);
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token
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expect(const token_type&,
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const std::string&);
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token
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expect(const token_type&,
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const token_type&,
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const std::string&);
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token
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expect(const token_type&,
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const token_type&,
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const token_type&,
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const std::string&);
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token
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expect(const token_type&,
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const token_type&,
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const token_type&,
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const token_type&,
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const std::string&);
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token
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expect(const token_type&,
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const token_type&,
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const token_type&,
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const token_type&,
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const token_type&,
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const token_type&,
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const token_type&,
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const std::string&);
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token
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expect(const token_type&,
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const token_type&,
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const token_type&,
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const token_type&,
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const token_type&,
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const token_type&,
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const token_type&,
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const token_type&,
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const std::string&);
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};
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template< class TKZ >
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parser< TKZ >::parser(TKZ& tkz) :
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m_tkz(tkz),
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m_thrown(false)
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{
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}
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template< class TKZ >
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parser< TKZ >::~parser(void)
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{
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if (!m_errors.empty() && !m_thrown)
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throw m_errors;
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}
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template< class TKZ >
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bool
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parser< TKZ >::good(void)
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const
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{
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return m_tkz.m_is.good();
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}
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template< class TKZ >
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void
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parser< TKZ >::add_error(const parse_error& pe)
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{
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m_errors.push_back(pe);
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}
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template< class TKZ >
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bool
|
||
|
|
parser< TKZ >::has_errors(void)
|
||
|
|
const
|
||
|
|
{
|
||
|
|
return !m_errors.empty();
|
||
|
|
}
|
||
|
|
|
||
|
|
template< class TKZ >
|
||
|
|
token
|
||
|
|
parser< TKZ >::next(void)
|
||
|
|
{
|
||
|
|
token t = m_tkz.next();
|
||
|
|
|
||
|
|
m_last = t;
|
||
|
|
|
||
|
|
if (t.type() == m_tkz.m_eof_type) {
|
||
|
|
if (!m_errors.empty()) {
|
||
|
|
m_thrown = true;
|
||
|
|
throw m_errors;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return t;
|
||
|
|
}
|
||
|
|
|
||
|
|
template< class TKZ >
|
||
|
|
std::string
|
||
|
|
parser< TKZ >::rest_of_line(void)
|
||
|
|
{
|
||
|
|
return m_tkz.rest_of_line();
|
||
|
|
}
|
||
|
|
|
||
|
|
template< class TKZ >
|
||
|
|
token
|
||
|
|
parser< TKZ >::reset(const token_type& stop)
|
||
|
|
{
|
||
|
|
token t = m_last;
|
||
|
|
|
||
|
|
while (t.type() != m_tkz.m_eof_type && t.type() != stop)
|
||
|
|
t = next();
|
||
|
|
|
||
|
|
return t;
|
||
|
|
}
|
||
|
|
|
||
|
|
template< class TKZ >
|
||
|
|
token
|
||
|
|
parser< TKZ >::expect(const token_type& t1,
|
||
|
|
const std::string& textual)
|
||
|
|
{
|
||
|
|
token t = next();
|
||
|
|
|
||
|
|
if (t.type() != t1)
|
||
|
|
throw parse_error(t.lineno(),
|
||
|
|
"Unexpected token `" + t.text() +
|
||
|
|
"'; expected " + textual);
|
||
|
|
|
||
|
|
return t;
|
||
|
|
}
|
||
|
|
|
||
|
|
template< class TKZ >
|
||
|
|
token
|
||
|
|
parser< TKZ >::expect(const token_type& t1,
|
||
|
|
const token_type& t2,
|
||
|
|
const std::string& textual)
|
||
|
|
{
|
||
|
|
token t = next();
|
||
|
|
|
||
|
|
if (t.type() != t1 && t.type() != t2)
|
||
|
|
throw parse_error(t.lineno(),
|
||
|
|
"Unexpected token `" + t.text() +
|
||
|
|
"'; expected " + textual);
|
||
|
|
|
||
|
|
return t;
|
||
|
|
}
|
||
|
|
|
||
|
|
template< class TKZ >
|
||
|
|
token
|
||
|
|
parser< TKZ >::expect(const token_type& t1,
|
||
|
|
const token_type& t2,
|
||
|
|
const token_type& t3,
|
||
|
|
const std::string& textual)
|
||
|
|
{
|
||
|
|
token t = next();
|
||
|
|
|
||
|
|
if (t.type() != t1 && t.type() != t2 && t.type() != t3)
|
||
|
|
throw parse_error(t.lineno(),
|
||
|
|
"Unexpected token `" + t.text() +
|
||
|
|
"'; expected " + textual);
|
||
|
|
|
||
|
|
return t;
|
||
|
|
}
|
||
|
|
|
||
|
|
template< class TKZ >
|
||
|
|
token
|
||
|
|
parser< TKZ >::expect(const token_type& t1,
|
||
|
|
const token_type& t2,
|
||
|
|
const token_type& t3,
|
||
|
|
const token_type& t4,
|
||
|
|
const std::string& textual)
|
||
|
|
{
|
||
|
|
token t = next();
|
||
|
|
|
||
|
|
if (t.type() != t1 && t.type() != t2 && t.type() != t3 &&
|
||
|
|
t.type() != t4)
|
||
|
|
throw parse_error(t.lineno(),
|
||
|
|
"Unexpected token `" + t.text() +
|
||
|
|
"'; expected " + textual);
|
||
|
|
|
||
|
|
return t;
|
||
|
|
}
|
||
|
|
|
||
|
|
template< class TKZ >
|
||
|
|
token
|
||
|
|
parser< TKZ >::expect(const token_type& t1,
|
||
|
|
const token_type& t2,
|
||
|
|
const token_type& t3,
|
||
|
|
const token_type& t4,
|
||
|
|
const token_type& t5,
|
||
|
|
const token_type& t6,
|
||
|
|
const token_type& t7,
|
||
|
|
const std::string& textual)
|
||
|
|
{
|
||
|
|
token t = next();
|
||
|
|
|
||
|
|
if (t.type() != t1 && t.type() != t2 && t.type() != t3 &&
|
||
|
|
t.type() != t4 && t.type() != t5 && t.type() != t6 &&
|
||
|
|
t.type() != t7)
|
||
|
|
throw parse_error(t.lineno(),
|
||
|
|
"Unexpected token `" + t.text() +
|
||
|
|
"'; expected " + textual);
|
||
|
|
|
||
|
|
return t;
|
||
|
|
}
|
||
|
|
|
||
|
|
template< class TKZ >
|
||
|
|
token
|
||
|
|
parser< TKZ >::expect(const token_type& t1,
|
||
|
|
const token_type& t2,
|
||
|
|
const token_type& t3,
|
||
|
|
const token_type& t4,
|
||
|
|
const token_type& t5,
|
||
|
|
const token_type& t6,
|
||
|
|
const token_type& t7,
|
||
|
|
const token_type& t8,
|
||
|
|
const std::string& textual)
|
||
|
|
{
|
||
|
|
token t = next();
|
||
|
|
|
||
|
|
if (t.type() != t1 && t.type() != t2 && t.type() != t3 &&
|
||
|
|
t.type() != t4 && t.type() != t5 && t.type() != t6 &&
|
||
|
|
t.type() != t7 && t.type() != t8)
|
||
|
|
throw parse_error(t.lineno(),
|
||
|
|
"Unexpected token `" + t.text() +
|
||
|
|
"'; expected " + textual);
|
||
|
|
|
||
|
|
return t;
|
||
|
|
}
|
||
|
|
|
||
|
|
#define ATF_PARSER_CALLBACK(parser, func) \
|
||
|
|
do { \
|
||
|
|
if (!(parser).has_errors()) \
|
||
|
|
func; \
|
||
|
|
} while (false)
|
||
|
|
|
||
|
|
// ------------------------------------------------------------------------
|
||
|
|
// Header parsing.
|
||
|
|
// ------------------------------------------------------------------------
|
||
|
|
|
||
|
|
typedef std::map< std::string, std::string > attrs_map;
|
||
|
|
|
||
|
|
class header_entry {
|
||
|
|
std::string m_name;
|
||
|
|
std::string m_value;
|
||
|
|
attrs_map m_attrs;
|
||
|
|
|
||
|
|
public:
|
||
|
|
header_entry(void);
|
||
|
|
header_entry(const std::string&, const std::string&,
|
||
|
|
attrs_map = attrs_map());
|
||
|
|
|
||
|
|
const std::string& name(void) const;
|
||
|
|
const std::string& value(void) const;
|
||
|
|
const attrs_map& attrs(void) const;
|
||
|
|
bool has_attr(const std::string&) const;
|
||
|
|
const std::string& get_attr(const std::string&) const;
|
||
|
|
};
|
||
|
|
|
||
|
|
typedef std::map< std::string, header_entry > headers_map;
|
||
|
|
|
||
|
|
std::pair< size_t, headers_map > read_headers(std::istream&, size_t);
|
||
|
|
void write_headers(const headers_map&, std::ostream&);
|
||
|
|
void validate_content_type(const headers_map&, const std::string&, int);
|
||
|
|
|
||
|
|
} // namespace parser
|
||
|
|
} // namespace atf
|
||
|
|
|
||
|
|
#endif // !defined(_ATF_CXX_PARSER_HPP_)
|