mirror of
https://github.com/oxen-io/lokinet.git
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1697bf90fe
Compiles with C++17, replaces ghc::filesystem with std::filesystem, nonstd::optional with std::optional, and llarp::string_view with std::string_view.
79 lines
1.7 KiB
C++
79 lines
1.7 KiB
C++
#ifndef LLARP_FS_HPP
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#define LLARP_FS_HPP
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#include <functional>
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#if defined(WIN32) || defined(_WIN32)
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#define PATH_SEP "\\"
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#else
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#define PATH_SEP "/"
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#endif
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#include <filesystem>
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namespace fs = std::filesystem;
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#ifndef _MSC_VER
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#include <dirent.h>
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#endif
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#include <optional>
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namespace llarp
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{
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namespace util
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{
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using error_code_t = std::error_code;
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/// Ensure that a file exists and has correct permissions
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/// return any error code or success
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error_code_t
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EnsurePrivateFile(fs::path pathname);
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/// open a stream to a file and ensure it exists before open
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/// sets any permissions on creation
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template <typename T>
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std::optional<T>
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OpenFileStream(fs::path pathname, std::ios::openmode mode)
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{
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if (EnsurePrivateFile(pathname))
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return {};
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std::string f = pathname.string();
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return T{pathname, mode};
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}
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using PathVisitor = std::function<bool(const fs::path&)>;
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using PathIter = std::function<void(const fs::path&, PathVisitor)>;
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static PathIter IterDir = [](const fs::path& path, PathVisitor visit) {
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#ifdef _MSC_VER
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for (auto& p : fs::directory_iterator(path))
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{
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if (!visit(p.path()))
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{
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break;
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}
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}
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#else
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DIR* d = opendir(path.string().c_str());
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if (d == nullptr)
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return;
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struct dirent* ent = nullptr;
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do
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{
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ent = readdir(d);
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if (!ent)
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break;
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if (ent->d_name[0] == '.')
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continue;
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fs::path p = path / fs::path(ent->d_name);
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if (!visit(p))
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break;
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} while (ent);
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closedir(d);
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#endif
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};
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} // namespace util
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} // namespace llarp
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#endif // end LLARP_FS_HPP
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