d2/parser_context.h

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// Copyright (C) 2017-2021 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

#ifndef PARSER_CONTEXT_H
#define PARSER_CONTEXT_H
#include <string>
#include <map>
#include <vector>
#include <d2/d2_parser.h>
#include <d2/parser_context_decl.h>
#include <exceptions/exceptions.h>

// Tell Flex the lexer's prototype ...
#define YY_DECL isc::d2::D2Parser::symbol_type d2_parser_lex (D2ParserContext& driver)

// ... and declare it for the parser's sake.
YY_DECL;

namespace isc {
namespace d2 {

class D2ParseError : public isc::Exception {
public:
    D2ParseError(const char* file, size_t line, const char* what) :
        isc::Exception(file, line, what) { };
};

class D2ParserContext
{
public:

    typedef enum {
        PARSER_JSON,

        PARSER_DHCPDDNS,

        PARSER_SUB_DHCPDDNS,

        PARSER_TSIG_KEY,

        PARSER_TSIG_KEYS,

        PARSER_DDNS_DOMAIN,

        PARSER_DDNS_DOMAINS,

        PARSER_DNS_SERVER,

        PARSER_DNS_SERVERS,

        PARSER_HOOKS_LIBRARY
    } ParserType;

    D2ParserContext();

    virtual ~D2ParserContext();

    std::vector<isc::data::ElementPtr> stack_;

    void scanStringBegin(const std::string& str, ParserType type);

    void scanFileBegin(FILE* f, const std::string& filename, ParserType type);

    void scanEnd();

    void includeFile(const std::string& filename);

    isc::data::ElementPtr parseString(const std::string& str,
                                      ParserType parser_type);

    isc::data::ElementPtr parseFile(const std::string& filename,
                                    ParserType parser_type);

    void error(const isc::d2::location& loc,
               const std::string& what,
               size_t pos = 0);

    void error(const std::string& what);

    static void fatal(const std::string& what);

    isc::data::Element::Position loc2pos(isc::d2::location& loc);

    void require(const std::string& name,
                 isc::data::Element::Position open_loc,
                 isc::data::Element::Position close_loc);

    void unique(const std::string& name,
                isc::data::Element::Position loc);

    typedef enum {
        NO_KEYWORD,

        CONFIG,

        DHCPDDNS,

        TSIG_KEY,

        TSIG_KEYS,

        ALGORITHM,

        DIGEST_BITS,

        SECRET,

        FORWARD_DDNS,

        REVERSE_DDNS,

        DDNS_DOMAIN,

        DDNS_DOMAINS,

        DNS_SERVER,

        DNS_SERVERS,

        CONTROL_SOCKET,

        LOGGERS,

        OUTPUT_OPTIONS,

        NCR_PROTOCOL,

        NCR_FORMAT,

        HOOKS_LIBRARIES

    } ParserContext;

    std::string file_;

    std::vector<std::string> files_;

    isc::d2::location loc_;

    std::vector<isc::d2::location> locs_;

    std::vector<struct yy_buffer_state*> states_;

    FILE* sfile_;

    std::vector<FILE*> sfiles_;

    ParserContext ctx_;

    void enter(const ParserContext& ctx);

    void leave();

    const std::string contextName();

 private:
    bool trace_scanning_;

    bool trace_parsing_;

    std::vector<ParserContext> cstack_;

    isc::data::ElementPtr parseCommon();
};

} // end of isc::eval namespace
} // end of isc namespace

#endif