| 383 | } |
| 384 | |
| 385 | std::optional<uint64_t> ParseByteUnits(std::string_view str, ByteUnit default_multiplier) |
| 386 | { |
| 387 | if (str.empty()) { |
| 388 | return std::nullopt; |
| 389 | } |
| 390 | auto multiplier = default_multiplier; |
| 391 | char unit = str.back(); |
| 392 | switch (unit) { |
| 393 | case 'k': |
| 394 | multiplier = ByteUnit::k; |
| 395 | break; |
| 396 | case 'K': |
| 397 | multiplier = ByteUnit::K; |
| 398 | break; |
| 399 | case 'm': |
| 400 | multiplier = ByteUnit::m; |
| 401 | break; |
| 402 | case 'M': |
| 403 | multiplier = ByteUnit::M; |
| 404 | break; |
| 405 | case 'g': |
| 406 | multiplier = ByteUnit::g; |
| 407 | break; |
| 408 | case 'G': |
| 409 | multiplier = ByteUnit::G; |
| 410 | break; |
| 411 | case 't': |
| 412 | multiplier = ByteUnit::t; |
| 413 | break; |
| 414 | case 'T': |
| 415 | multiplier = ByteUnit::T; |
| 416 | break; |
| 417 | default: |
| 418 | unit = 0; |
| 419 | break; |
| 420 | } |
| 421 | |
| 422 | uint64_t unit_amount = static_cast<uint64_t>(multiplier); |
| 423 | auto parsed_num = ToIntegral<uint64_t>(unit ? str.substr(0, str.size() - 1) : str); |
| 424 | if (!parsed_num || parsed_num > std::numeric_limits<uint64_t>::max() / unit_amount) { // check overflow |
| 425 | return std::nullopt; |
| 426 | } |
| 427 | return *parsed_num * unit_amount; |
| 428 | } |
| 429 | |
| 430 | bool CaseInsensitiveEqual(std::string_view s1, std::string_view s2) |
| 431 | { |