libcruft-util/io.hpp

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/*
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* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
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*
* Copyright 2010-2014 Danny Robson <danny@nerdcruft.net>
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*/
#ifndef __UTIL_IO_HPP
#define __UTIL_IO_HPP
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#include "types.hpp"
#include "platform.hpp"
#include "nocopy.hpp"
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#include <sys/stat.h>
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#include <cstdio>
#include <cstdint>
#include <memory>
#include <boost/filesystem/path.hpp>
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#ifdef PLATFORM_WIN32
#include <windows.h>
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#else
#define O_BINARY 0
#endif
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namespace util {
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///------------------------------------------------------------------------
/// A simple RAII wrapper for file descriptors
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struct fd {
public:
explicit fd (int);
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fd (const char *path, int flags, mode_t mode = 0660);
fd (const boost::filesystem::path&, int flags);
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~fd ();
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operator int (void) const { return m_fd; }
private:
int m_fd;
};
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//-------------------------------------------------------------------------
#ifdef PLATFORM_WIN32
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struct handle : util::nocopy {
public:
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explicit handle (HANDLE);
explicit handle ();
~handle ();
void reset (HANDLE);
operator HANDLE (void) const;
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HANDLE fd;
};
#endif
/// Reads an entire file into memory.
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std::vector<char> slurp (const boost::filesystem::path&);
std::vector<char> slurp (FILE *);
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//-------------------------------------------------------------------------
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void write (const fd&, const void *restrict data, size_t bytes);
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template <typename T>
void write (const fd&, const T &data);
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template <typename T>
void write (const fd&, const T *restrict first, const T *restrict last);
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//-------------------------------------------------------------------------
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class indenter : public std::streambuf {
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protected:
std::streambuf* m_dest;
bool m_line_start;
std::string m_indent;
std::ostream* m_owner;
protected:
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virtual int overflow (int ch) override;
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public:
explicit indenter (std::streambuf* _dest, size_t _indent = 4);
explicit indenter (std::ostream& _dest, size_t _indent = 4);
virtual ~indenter ();
};
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//-------------------------------------------------------------------------
template <typename T>
struct indented {
indented (const T &_data);
const T &data;
};
//-------------------------------------------------------------------------
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template <typename T>
indented<T>
make_indented (const T &_data);
//-------------------------------------------------------------------------
template <typename T>
std::ostream&
operator<< (std::ostream &os, const util::indented<T> &v);
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//-------------------------------------------------------------------------
class scoped_cwd {
public:
scoped_cwd ();
~scoped_cwd ();
protected:
std::string m_original;
};
//-------------------------------------------------------------------------
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class path_error : public std::runtime_error {
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public:
path_error (const boost::filesystem::path &path);
const char* path (void) const noexcept;
private:
const boost::filesystem::path m_path;
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};
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class stream_error : public std::exception {
public:
virtual ~stream_error () { ; }
virtual const char* what (void) const noexcept
{ return "error on C stream"; }
};
}
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#ifdef PLATFORM_WIN32
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#include "./io_win32.hpp"
#else
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#include "./io_posix.hpp"
#endif
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#include "./io.ipp"
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#endif