| 1 | |
| 2 | /* |
| 3 | * Copyright (c) 2022 Francis Deslauriers <francis.deslauriers@efficios.com> |
| 4 | * |
| 5 | * SPDX-License-Identifier: MIT |
| 6 | */ |
| 7 | #include <fstream> |
| 8 | |
| 9 | #include "logging.hpp" |
| 10 | |
| 11 | #include "exc.hpp" |
| 12 | #include "file-utils.hpp" |
| 13 | |
| 14 | namespace bt2c { |
| 15 | |
| 16 | std::vector<std::uint8_t> dataFromFile(const CStringView filePath, const Logger& logger, |
| 17 | const bool fatalError) |
| 18 | { |
| 19 | /* |
| 20 | * Open a file stream and seek to the end of the stream to compute the size |
| 21 | * of the buffer required. |
| 22 | */ |
| 23 | std::ifstream file {filePath.data(), std::ios::binary | std::ios::ate}; |
| 24 | |
| 25 | if (!file) { |
| 26 | constexpr const char *msg = "No such file or directory: path=\"{}\""; |
| 27 | |
| 28 | if (fatalError) { |
| 29 | BT_CPPLOGE_APPEND_CAUSE_SPEC(logger, msg, filePath); |
| 30 | } else { |
| 31 | BT_CPPLOGD_SPEC(logger, msg, filePath); |
| 32 | } |
| 33 | |
| 34 | throw NoSuchFileOrDirectoryError {}; |
| 35 | } |
| 36 | |
| 37 | const auto size = file.tellg(); |
| 38 | std::vector<uint8_t> buffer(static_cast<std::size_t>(size)); |
| 39 | |
| 40 | /* |
| 41 | * Seek the reading head back at the beginning of the stream to actually |
| 42 | * read the content. |
| 43 | */ |
| 44 | file.seekg(0, std::ios::beg); |
| 45 | file.read(reinterpret_cast<char *>(buffer.data()), size); |
| 46 | return buffer; |
| 47 | } |
| 48 | |
| 49 | } /* namespace bt2c */ |