25 Status SequentialFileReader::Read(size_t n, Slice* result, char* scratch) {  in Read()  argument
29     size_t offset = offset_.fetch_add(n);  in Read()
33     size_t size = Roundup(offset + n, alignment) - aligned_offset;  in Read()
44                    std::min(tmp.size() - offset_advance, n));  in Read()
49     s = file_->Read(n, IOOptions(), result, scratch, nullptr);  in Read()
55 Status SequentialFileReader::Skip(uint64_t n) {  in Skip()  argument
58     offset_ += static_cast<size_t>(n);  in Skip()
62   return file_->Skip(n);  in Skip()
88   IOStatus Read(size_t n, const IOOptions& opts, Slice* result, char* scratch,  in Read()  argument
97     if (TryReadFromCache(n, &cached_len, scratch) &&  in Read()
98         (cached_len == n || buffer_.CurrentSize() < readahead_size_)) {  in Read()
103     n -= cached_len;  in Read()
107     if (n + alignment_ >= readahead_size_) {  in Read()
108       s = file_->Read(n, opts, result, scratch + cached_len, dbg);  in Read()
121       TryReadFromCache(n, &remaining_len, scratch + cached_len);  in Read()
127   IOStatus Skip(uint64_t n) override {  in Skip()  argument
133       if (read_offset_ + n >= buffer_offset_ + buffer_.CurrentSize()) {  in Skip()
135         n -= buffer_offset_ + buffer_.CurrentSize() - read_offset_;  in Skip()
139         read_offset_ += n;  in Skip()
140         n = 0;  in Skip()
143     if (n > 0) {  in Skip()
145       s = file_->Skip(n);  in Skip()
147         read_offset_ += n;  in Skip()
154   IOStatus PositionedRead(uint64_t offset, size_t n, const IOOptions& opts,  in PositionedRead()  argument
157     return file_->PositionedRead(offset, n, opts, result, scratch, dbg);  in PositionedRead()
173   bool TryReadFromCache(size_t n, size_t* cached_len, char* scratch) {  in TryReadFromCache()  argument
181         buffer_.CurrentSize() - static_cast<size_t>(offset_in_buffer), n);  in TryReadFromCache()
190   IOStatus ReadIntoBuffer(size_t n, const IOOptions& opts,  in ReadIntoBuffer()  argument
192     if (n > buffer_.Capacity()) {  in ReadIntoBuffer()
193       n = buffer_.Capacity();  in ReadIntoBuffer()
195     assert(IsFileSectorAligned(n, alignment_));  in ReadIntoBuffer()
197     IOStatus s = file_->Read(n, opts, &result, buffer_.BufferStart(), dbg);  in ReadIntoBuffer()