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61 lines
1.9 KiB
C++
61 lines
1.9 KiB
C++
/* Copyright (C) 2014 InfiniDB, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; version 2 of
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the License.
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This program 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#pragma once
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#include <stdexcept>
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#include <boost/utility.hpp>
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#include "IDBDataFile.h"
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#include <unistd.h>
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namespace idbdatafile
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{
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/**
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* BufferedFile implements the IDBDataFile for I/O to a C library FILE*
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* (via fopen, fwrite, fread, etc.). See IDBDataFile.h for more documentation
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* on member functions.
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*/
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class BufferedFile : public IDBDataFile, boost::noncopyable
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{
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public:
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BufferedFile(const char* fname, const char* mode, unsigned opts);
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/* virtual */ ~BufferedFile() override;
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/* virtual */ ssize_t pread(void* ptr, off64_t offset, size_t count) override;
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/* virtual */ ssize_t read(void* ptr, size_t count) override;
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/* virtual */ ssize_t write(const void* ptr, size_t count) override;
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/* virtual */ int seek(off64_t offset, int whence) override;
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/* virtual */ int truncate(off64_t length) override;
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/* virtual */ off64_t size() override;
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/* virtual */ off64_t tell() override;
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/* virtual */ int flush() override;
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/* virtual */ time_t mtime() override;
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/* virtual */ int fallocate(int mode, off64_t offset, off64_t length) override;
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protected:
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/* virtual */
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int close() override;
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private:
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void applyOptions(unsigned opts);
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FILE* m_fp;
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char* m_buffer;
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};
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} // namespace idbdatafile
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