libcruft-util/io.hpp

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/*
* This file is part of libgim.
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*
* Waif is free software: you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation, either version 3 of the License, or (at your option) any later
* version.
*
* Waif is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with libgim. If not, see <http://www.gnu.org/licenses/>.
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*
* Copyright 2010 Danny Robson <danny@blubinc.net>
*/
#ifndef __UTIL_IO_HPP
#define __UTIL_IO_HPP
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#include "annotations.hpp"
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#include <cstdio>
#include <cstdint>
#include <memory>
#include <boost/filesystem.hpp>
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/// Specifies bitwise combinations of IO access rights.
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enum access_t {
ACCESS_READ = 1 << 0,
ACCESS_WRITE = 1 << 1,
ACCESS_READWRITE = ACCESS_READ | ACCESS_WRITE
};
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/// Reads an entire file into memory. Caller frees the result. Guarantees a
/// null trailing byte.
uint8_t *
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slurp (const boost::filesystem::path&) mustuse;
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/// A simple RAII wrapper for file descriptors
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struct fd_ref {
public:
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int fd;
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fd_ref (int _fd);
~fd_ref ();
operator int (void) const;
};
#if defined(HAVE_MMAP)
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/// Wraps a mechanism to map a file into memory. Read only.
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class mapped_file {
protected:
fd_ref m_fd;
uint8_t *m_data;
size_t m_size;
void load_fd (void);
public:
mapped_file (const char *path);
mapped_file (const std::string &path);
mapped_file (const boost::filesystem::path &path);
mapped_file (const mapped_file &rhs);
mapped_file& operator =(const mapped_file &rhs);
~mapped_file ();
const uint8_t* data (void) const;
size_t size (void) const;
};
#endif
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#endif