a0a222eec0
Boost Filesystem basename() function is deprecated since v1.36.0. Also, defining BOOST_FILESYSTEM_NO_DEPRECATED before including filesystem headers is strongly recommended. This prevents inadvertent use of old features, particularly legacy function names, that have been replaced and are going to go away in the future.
97 lines
3.2 KiB
C++
97 lines
3.2 KiB
C++
// Copyright (c) 2017-2018 The Bitcoin Core developers
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// Distributed under the MIT software license, see the accompanying
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// file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#ifndef BITCOIN_FS_H
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#define BITCOIN_FS_H
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#include <stdio.h>
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#include <string>
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#if defined WIN32 && defined __GLIBCXX__
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#include <ext/stdio_filebuf.h>
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#endif
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#define BOOST_FILESYSTEM_NO_DEPRECATED
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#include <boost/filesystem.hpp>
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#include <boost/filesystem/fstream.hpp>
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/** Filesystem operations and types */
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namespace fs = boost::filesystem;
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/** Bridge operations to C stdio */
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namespace fsbridge {
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FILE *fopen(const fs::path& p, const char *mode);
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class FileLock
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{
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public:
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FileLock() = delete;
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FileLock(const FileLock&) = delete;
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FileLock(FileLock&&) = delete;
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explicit FileLock(const fs::path& file);
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~FileLock();
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bool TryLock();
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std::string GetReason() { return reason; }
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private:
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std::string reason;
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#ifndef WIN32
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int fd = -1;
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#else
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void* hFile = (void*)-1; // INVALID_HANDLE_VALUE
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#endif
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};
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std::string get_filesystem_error_message(const fs::filesystem_error& e);
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// GNU libstdc++ specific workaround for opening UTF-8 paths on Windows.
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//
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// On Windows, it is only possible to reliably access multibyte file paths through
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// `wchar_t` APIs, not `char` APIs. But because the C++ standard doesn't
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// require ifstream/ofstream `wchar_t` constructors, and the GNU library doesn't
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// provide them (in contrast to the Microsoft C++ library, see
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// https://stackoverflow.com/questions/821873/how-to-open-an-stdfstream-ofstream-or-ifstream-with-a-unicode-filename/822032#822032),
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// Boost is forced to fall back to `char` constructors which may not work properly.
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//
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// Work around this issue by creating stream objects with `_wfopen` in
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// combination with `__gnu_cxx::stdio_filebuf`. This workaround can be removed
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// with an upgrade to C++17, where streams can be constructed directly from
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// `std::filesystem::path` objects.
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#if defined WIN32 && defined __GLIBCXX__
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class ifstream : public std::istream
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{
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public:
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ifstream() = default;
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explicit ifstream(const fs::path& p, std::ios_base::openmode mode = std::ios_base::in) { open(p, mode); }
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~ifstream() { close(); }
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void open(const fs::path& p, std::ios_base::openmode mode = std::ios_base::in);
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bool is_open() { return m_filebuf.is_open(); }
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void close();
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private:
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__gnu_cxx::stdio_filebuf<char> m_filebuf;
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FILE* m_file = nullptr;
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};
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class ofstream : public std::ostream
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{
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public:
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ofstream() = default;
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explicit ofstream(const fs::path& p, std::ios_base::openmode mode = std::ios_base::out) { open(p, mode); }
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~ofstream() { close(); }
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void open(const fs::path& p, std::ios_base::openmode mode = std::ios_base::out);
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bool is_open() { return m_filebuf.is_open(); }
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void close();
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private:
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__gnu_cxx::stdio_filebuf<char> m_filebuf;
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FILE* m_file = nullptr;
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};
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#else // !(WIN32 && __GLIBCXX__)
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typedef fs::ifstream ifstream;
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typedef fs::ofstream ofstream;
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#endif // WIN32 && __GLIBCXX__
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};
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#endif // BITCOIN_FS_H
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