master_loader.h

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// Copyright (C) 2012-2026 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 MASTER_LOADER_H
#define MASTER_LOADER_H
 
#include <dns/exceptions.h>
#include <dns/master_loader_callbacks.h>
 
#include <cstdint>
#include <memory>
 
#include <boost/noncopyable.hpp>
 
namespace isc {
namespace dns {
 
class Name;
class RRClass;

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

class MasterLoader : boost::noncopyable {
public:
    enum Options : uint16_t {
        DEFAULT = 0,       
        MANY_ERRORS = 1    
    };

    MasterLoader(const char* master_file,
                 const Name& zone_origin,
                 const RRClass& zone_class,
                 const MasterLoaderCallbacks& callbacks,
                 const AddRRCallback& add_callback,
                 Options options = DEFAULT);

    MasterLoader(std::istream& input,
                 const Name& zone_origin,
                 const RRClass& zone_class,
                 const MasterLoaderCallbacks& callbacks,
                 const AddRRCallback& add_callback,
                 Options options = DEFAULT);

    ~MasterLoader();

    bool loadIncremental(size_t count_limit);

    void load() {
        while (!loadIncremental(1000)) { // 1000 = arbitrary largish number
            // Body intentionally left blank
        }
    }

    bool loadedSuccessfully() const;

    size_t getSize() const;

    size_t getPosition() const;
 
private:
    class MasterLoaderImpl;
    std::unique_ptr<MasterLoaderImpl> impl_;
};
 
} // end namespace dns
} // end namespace isc
 
#endif // MASTER_LOADER_H