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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
commit | 19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch) | |
tree | 42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /src/zstd/contrib/pzstd/utils/FileSystem.h | |
parent | Initial commit. (diff) | |
download | ceph-6d07fdb6bb33b1af39833b850bb6cf8af79fe293.tar.xz ceph-6d07fdb6bb33b1af39833b850bb6cf8af79fe293.zip |
Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/zstd/contrib/pzstd/utils/FileSystem.h | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/src/zstd/contrib/pzstd/utils/FileSystem.h b/src/zstd/contrib/pzstd/utils/FileSystem.h new file mode 100644 index 000000000..3cfbe86e5 --- /dev/null +++ b/src/zstd/contrib/pzstd/utils/FileSystem.h @@ -0,0 +1,94 @@ +/* + * Copyright (c) 2016-present, Facebook, Inc. + * All rights reserved. + * + * This source code is licensed under both the BSD-style license (found in the + * LICENSE file in the root directory of this source tree) and the GPLv2 (found + * in the COPYING file in the root directory of this source tree). + */ +#pragma once + +#include "utils/Range.h" + +#include <sys/stat.h> +#include <cerrno> +#include <cstdint> +#include <system_error> + +// A small subset of `std::filesystem`. +// `std::filesystem` should be a drop in replacement. +// See http://en.cppreference.com/w/cpp/filesystem for documentation. + +namespace pzstd { + +// using file_status = ... causes gcc to emit a false positive warning +#if defined(_MSC_VER) +typedef struct ::_stat64 file_status; +#else +typedef struct ::stat file_status; +#endif + +/// http://en.cppreference.com/w/cpp/filesystem/status +inline file_status status(StringPiece path, std::error_code& ec) noexcept { + file_status status; +#if defined(_MSC_VER) + const auto error = ::_stat64(path.data(), &status); +#else + const auto error = ::stat(path.data(), &status); +#endif + if (error) { + ec.assign(errno, std::generic_category()); + } else { + ec.clear(); + } + return status; +} + +/// http://en.cppreference.com/w/cpp/filesystem/is_regular_file +inline bool is_regular_file(file_status status) noexcept { +#if defined(S_ISREG) + return S_ISREG(status.st_mode); +#elif !defined(S_ISREG) && defined(S_IFMT) && defined(S_IFREG) + return (status.st_mode & S_IFMT) == S_IFREG; +#else + static_assert(false, "No POSIX stat() support."); +#endif +} + +/// http://en.cppreference.com/w/cpp/filesystem/is_regular_file +inline bool is_regular_file(StringPiece path, std::error_code& ec) noexcept { + return is_regular_file(status(path, ec)); +} + +/// http://en.cppreference.com/w/cpp/filesystem/is_directory +inline bool is_directory(file_status status) noexcept { +#if defined(S_ISDIR) + return S_ISDIR(status.st_mode); +#elif !defined(S_ISDIR) && defined(S_IFMT) && defined(S_IFDIR) + return (status.st_mode & S_IFMT) == S_IFDIR; +#else + static_assert(false, "NO POSIX stat() support."); +#endif +} + +/// http://en.cppreference.com/w/cpp/filesystem/is_directory +inline bool is_directory(StringPiece path, std::error_code& ec) noexcept { + return is_directory(status(path, ec)); +} + +/// http://en.cppreference.com/w/cpp/filesystem/file_size +inline std::uintmax_t file_size( + StringPiece path, + std::error_code& ec) noexcept { + auto stat = status(path, ec); + if (ec) { + return -1; + } + if (!is_regular_file(stat)) { + ec.assign(ENOTSUP, std::generic_category()); + return -1; + } + ec.clear(); + return stat.st_size; +} +} |