| 390 | } |
| 391 | |
| 392 | WasiExpect<void> INode::fdPread(Span<Span<uint8_t>> IOVs, |
| 393 | __wasi_filesize_t Offset, |
| 394 | __wasi_size_t &NRead) const noexcept { |
| 395 | iovec SysIOVs[kIOVMax]; |
| 396 | size_t SysIOVsSize = 0; |
| 397 | for (auto &IOV : IOVs) { |
| 398 | SysIOVs[SysIOVsSize].iov_base = IOV.data(); |
| 399 | SysIOVs[SysIOVsSize].iov_len = IOV.size(); |
| 400 | ++SysIOVsSize; |
| 401 | } |
| 402 | |
| 403 | #if __GLIBC_PREREQ(2, 10) |
| 404 | // Store read bytes length. |
| 405 | if (auto Res = ::preadv(Fd, SysIOVs, SysIOVsSize, Offset); |
| 406 | unlikely(Res < 0)) { |
| 407 | return WasiUnexpect(fromErrNo(errno)); |
| 408 | } else { |
| 409 | NRead = EndianValue(static_cast<__wasi_size_t>(Res)).le(); |
| 410 | } |
| 411 | #else |
| 412 | const auto OldOffset = ::lseek(Fd, 0, SEEK_CUR); |
| 413 | if (OldOffset < 0) { |
| 414 | return WasiUnexpect(fromErrNo(errno)); |
| 415 | } |
| 416 | if (::lseek(Fd, Offset, SEEK_SET) < 0 || |
| 417 | ::lseek(Fd, OldOffset, SEEK_SET) < 0) { |
| 418 | return WasiUnexpect(fromErrNo(errno)); |
| 419 | } |
| 420 | if (auto Res = ::readv(Fd, SysIOVs, SysIOVsSize); unlikely(Res < 0)) { |
| 421 | ::lseek(Fd, OldOffset, SEEK_SET); |
| 422 | return WasiUnexpect(fromErrNo(errno)); |
| 423 | } else { |
| 424 | if (::lseek(Fd, OldOffset, SEEK_SET) < 0) { |
| 425 | return WasiUnexpect(fromErrNo(errno)); |
| 426 | } |
| 427 | NRead = EndianValue(static_cast<__wasi_size_t>(Res)).le(); |
| 428 | } |
| 429 | #endif |
| 430 | |
| 431 | return {}; |
| 432 | } |
| 433 | |
| 434 | WasiExpect<void> INode::fdPwrite(Span<Span<const uint8_t>> IOVs, |
| 435 | __wasi_filesize_t Offset, |
nothing calls this directly
no test coverage detected