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//
// Distributed under the terms of the BSD 3-Clause License.
//
// The full license is in the file LICENSE, distributed with this software.
#ifndef MAMBA_UTIL_CFILE_HPP
#define MAMBA_UTIL_CFILE_HPP
#include <cstdio>
#include <memory>
#include <system_error>
#include <tl/expected.hpp>
#include "mamba/fs/filesystem.hpp"
namespace mamba::util
{
class CFile
{
public:
/**
* Open a file with C API.
*
* In case of error, set the error code @p ec.
*
* @param path must have filesystem default encoding.
*/
static auto try_open( //
const fs::u8path& path,
const char* mode,
std::error_code& ec
) -> CFile;
static auto try_open( //
const fs::u8path& path,
const char* mode
) -> tl::expected<CFile, std::error_code>;
CFile(CFile&&) = default;
auto operator=(CFile&&) -> CFile& = default;
/**
* The destructor will flush and close the file descriptor.
*
* Like ``std::fstream``, exceptions are ignored.
* Explicitly call @ref close to get the exception.
*/
~CFile();
void try_close(std::error_code& ec) noexcept;
[[nodiscard]] auto try_close() noexcept -> tl::expected<void, std::error_code>;
auto raw() noexcept -> std::FILE*;
private:
struct FileClose
{
void operator()(std::FILE* ptr);
};
std::unique_ptr<std::FILE, FileClose> m_ptr = nullptr;
explicit CFile(std::FILE* ptr);
};
}
#endif
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