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tdutils/td/utils/filesystem.h

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+/*
+    This file is part of TON Blockchain Library.
+
+    TON Blockchain Library is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 2 of the License, or
+    (at your option) any later version.
+
+    TON Blockchain Library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with TON Blockchain Library.  If not, see <http://www.gnu.org/licenses/>.
+
+    Copyright 2017-2019 Telegram Systems LLP
+*/
+#pragma once
+
+#include "td/utils/buffer.h"
+#include "td/utils/Slice.h"
+#include "td/utils/SharedSlice.h"
+#include "td/utils/Status.h"
+
+namespace td {
+
+Result<BufferSlice> read_file(CSlice path, int64 size = -1, int64 offset = 0);
+Result<string> read_file_str(CSlice path, int64 size = -1, int64 offset = 0);
+Result<SecureString> read_file_secure(CSlice path, int64 size = -1, int64 offset = 0);
+
+Status copy_file(CSlice from, CSlice to, int64 size = -1) TD_WARN_UNUSED_RESULT;
+
+struct WriteFileOptions {
+  bool need_sync = true;
+  bool need_lock = true;
+};
+Status write_file(CSlice to, Slice data, WriteFileOptions options = {}) TD_WARN_UNUSED_RESULT;
+
+string clean_filename(CSlice name);
+
+// write file and ensure that it either fully overriden with new data, or left intact.
+// Uses path_tmp to temporary storat data, than calls rename
+Status atomic_write_file(CSlice path, Slice data, CSlice path_tmp = {});
+
+}  // namespace td