mirror of
https://github.com/oxen-io/lokinet.git
synced 2024-11-11 07:10:36 +00:00
8d2c22fc72
From https://github.com/gulrak/filesystem which is more up-to-date and looks better maintained than cppbackport.
87 lines
1.9 KiB
C++
87 lines
1.9 KiB
C++
#ifndef LLARP_FS_HPP
|
|
#define LLARP_FS_HPP
|
|
|
|
#include <functional>
|
|
|
|
#if defined(WIN32) || defined(_WIN32)
|
|
#define PATH_SEP "\\"
|
|
#else
|
|
#define PATH_SEP "/"
|
|
#endif
|
|
|
|
#if defined(LOKINET_USE_GHC_FILESYSTEM)
|
|
#include <ghc/filesystem.hpp>
|
|
namespace fs = ghc::filesystem;
|
|
#elif __cplusplus >= 201703L && !defined(_MSC_VER)
|
|
#include <filesystem>
|
|
namespace fs = std::filesystem;
|
|
#else
|
|
#include <experimental/filesystem>
|
|
namespace fs = std::experimental::filesystem;
|
|
#endif
|
|
|
|
#ifndef _MSC_VER
|
|
#include <dirent.h>
|
|
#endif
|
|
|
|
#include <absl/types/optional.h>
|
|
|
|
namespace llarp
|
|
{
|
|
namespace util
|
|
{
|
|
using error_code_t = std::error_code;
|
|
|
|
/// Ensure that a file exists and has correct permissions
|
|
/// return any error code or success
|
|
error_code_t
|
|
EnsurePrivateFile(fs::path pathname);
|
|
|
|
/// open a stream to a file and ensure it exists before open
|
|
/// sets any permissions on creation
|
|
template < typename T >
|
|
absl::optional< T >
|
|
OpenFileStream(fs::path pathname, std::ios::openmode mode)
|
|
{
|
|
if(EnsurePrivateFile(pathname))
|
|
return {};
|
|
|
|
std::string f = pathname.string();
|
|
return T{pathname, mode};
|
|
}
|
|
|
|
using PathVisitor = std::function< bool(const fs::path &) >;
|
|
using PathIter = std::function< void(const fs::path &, PathVisitor) >;
|
|
|
|
static PathIter IterDir = [](const fs::path &path, PathVisitor visit) {
|
|
#ifdef _MSC_VER
|
|
for(auto &p : fs::directory_iterator(path))
|
|
{
|
|
if(!visit(p.path()))
|
|
{
|
|
break;
|
|
}
|
|
}
|
|
#else
|
|
DIR *d = opendir(path.string().c_str());
|
|
if(d == nullptr)
|
|
return;
|
|
struct dirent *ent = nullptr;
|
|
do
|
|
{
|
|
ent = readdir(d);
|
|
if(!ent)
|
|
break;
|
|
if(ent->d_name[0] == '.')
|
|
continue;
|
|
fs::path p = path / fs::path(ent->d_name);
|
|
if(!visit(p))
|
|
break;
|
|
} while(ent);
|
|
closedir(d);
|
|
#endif
|
|
};
|
|
} // namespace util
|
|
} // namespace llarp
|
|
#endif // end LLARP_FS_HPP
|