88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2021 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef DBFFILE_HPP
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#define DBFFILE_HPP
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// mapnik
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#include <mapnik/feature.hpp>
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#include <mapnik/util/noncopyable.hpp>
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#include <mapnik/unicode.hpp>
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#if defined(MAPNIK_MEMORY_MAPPED_FILE)
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#include <mapnik/mapped_memory_cache.hpp>
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#pragma GCC diagnostic push
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#include <mapnik/warning_ignore.hpp>
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#include <boost/interprocess/streams/bufferstream.hpp>
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#pragma GCC diagnostic pop
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#endif
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// stl
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#include <vector>
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#include <string>
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#include <cassert>
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#include <fstream>
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struct field_descriptor
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{
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int index_;
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std::string name_;
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char type_;
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int length_;
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int dec_;
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std::streampos offset_;
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};
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class dbf_file : private mapnik::util::noncopyable
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{
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private:
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int num_records_;
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int num_fields_;
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std::size_t record_length_;
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std::vector<field_descriptor> fields_;
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#if defined(MAPNIK_MEMORY_MAPPED_FILE)
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boost::interprocess::ibufferstream file_;
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mapnik::mapped_region_ptr mapped_region_;
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#else
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std::ifstream file_;
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#endif
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char* record_;
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public:
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dbf_file();
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dbf_file(std::string const& file_name);
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~dbf_file();
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bool is_open();
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int num_records() const;
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int num_fields() const;
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field_descriptor const& descriptor(int col) const;
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void move_to(int index);
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std::string string_value(int col) const;
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void add_attribute(int col, mapnik::transcoder const& tr, mapnik::feature_impl & f) const;
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private:
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void read_header();
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int read_short();
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int read_int();
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void skip(int bytes);
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};
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#endif //DBFFILE_HPP
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