| // Copyright 2018 The Cobalt Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #include "starboard/common/storage.h" |
| |
| #include <algorithm> |
| |
| #include "starboard/common/log.h" |
| #include "starboard/common/string.h" |
| #include "starboard/file.h" |
| #include "starboard/shared/starboard/file_storage/storage_internal.h" |
| |
| const char kTempFileSuffix[] = ".temp"; |
| |
| bool SbStorageWriteRecord(SbStorageRecord record, |
| const char* data, |
| int64_t data_size) { |
| if (!SbStorageIsValidRecord(record) || !data || data_size < 0) { |
| return false; |
| } |
| |
| const char* name = record->name.c_str(); |
| char original_file_path[SB_FILE_MAX_PATH]; |
| if (!starboard::shared::starboard::GetUserStorageFilePath( |
| record->user, name, original_file_path, SB_FILE_MAX_PATH)) { |
| return false; |
| } |
| char temp_file_path[SB_FILE_MAX_PATH]; |
| SbStringCopy(temp_file_path, original_file_path, SB_FILE_MAX_PATH); |
| SbStringConcat(temp_file_path, kTempFileSuffix, SB_FILE_MAX_PATH); |
| |
| SbFileError error; |
| SbFile temp_file = SbFileOpen( |
| temp_file_path, kSbFileCreateAlways | kSbFileWrite | kSbFileRead, NULL, |
| &error); |
| if (error != kSbFileOk) { |
| return false; |
| } |
| |
| SbFileTruncate(temp_file, 0); |
| |
| const char* source = data; |
| int64_t to_write = data_size; |
| while (to_write > 0) { |
| int to_write_max = |
| static_cast<int>(std::min(to_write, static_cast<int64_t>(kSbInt32Max))); |
| int bytes_written = SbFileWrite(temp_file, source, to_write_max); |
| if (bytes_written < 0) { |
| SbFileClose(temp_file); |
| SbFileDelete(temp_file_path); |
| return false; |
| } |
| |
| source += bytes_written; |
| to_write -= bytes_written; |
| } |
| |
| SbFileFlush(temp_file); |
| |
| if (SbFileIsValid(record->file) && !SbFileClose(record->file)) { |
| return false; |
| } |
| |
| record->file = kSbFileInvalid; |
| |
| if (!SbFileDelete(original_file_path)) { |
| return false; |
| } |
| |
| if (rename(temp_file_path, original_file_path) != 0) { |
| return false; |
| } |
| |
| SbFileFlush(temp_file); |
| |
| record->file = temp_file; |
| |
| return true; |
| } |