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libs/filesystem/example/mbcopy.cpp

//  Boost.Filesystem mbcopy.cpp  ---------------------------------------------//

//  Copyright Beman Dawes 2005

//  Use, modification, and distribution is subject to the Boost Software
//  License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
//  http://www.boost.org/LICENSE_1_0.txt)

//  Copy the files in a directory, using mbpath to represent the new file names
//  See http://../doc/path.htm#mbpath for more information

//  See deprecated_test for tests of deprecated features
#define BOOST_FILESYSTEM_NO_DEPRECATED

#include <boost/filesystem/config.hpp>
#ifdef BOOST_FILESYSTEM_NARROW_ONLY
#error This compiler or standard library does not support wide-character strings or paths
#endif

#include "mbpath.hpp"
#include <iostream>
#include <boost/filesystem/operations.hpp>
#include <boost/filesystem/fstream.hpp>
#include "../src/utf8_codecvt_facet.hpp"

namespace fs = boost::filesystem;

namespace {

// we can't use boost::filesystem::copy_file() because the argument types
// differ, so provide a not-very-smart replacement.
void copy_file(const fs::wpath& from, const user::mbpath& to)
{
    fs::ifstream from_file(from, std::ios_base::in | std::ios_base::binary);
    if (!from_file)
    {
        std::cout << "input open failed\n";
        return;
    }

    fs::ofstream to_file(to, std::ios_base::out | std::ios_base::binary);
    if (!to_file)
    {
        std::cout << "output open failed\n";
        return;
    }

    char c;
    while (from_file.get(c))
    {
        to_file.put(c);
        if (to_file.fail())
        {
            std::cout << "write error\n";
            return;
        }
    }

    if (!from_file.eof())
    {
        std::cout << "read error\n";
    }
}

} // namespace

int main(int argc, char* argv[])
{
    if (argc != 2)
    {
        std::cout << "Copy files in the current directory to a target directory\n"
                  << "Usage: mbcopy <target-dir>\n";
        return 1;
    }

    // For encoding, use Boost UTF-8 codecvt
    std::locale global_loc = std::locale();
    std::locale loc(global_loc, new fs::detail::utf8_codecvt_facet);
    user::mbpath_traits::imbue(loc);

    std::string target_string(argv[1]);
    user::mbpath target_dir(user::mbpath_traits::to_internal(target_string));

    if (!fs::is_directory(target_dir))
    {
        std::cout << "Error: " << argv[1] << " is not a directory\n";
        return 1;
    }

    for (fs::wdirectory_iterator it(L".");
         it != fs::wdirectory_iterator(); ++it)
    {
        if (fs::is_regular_file(it->status()))
        {
            copy_file(*it, target_dir / it->path().filename());
        }
    }

    return 0;
}