25 Status SequentialFileReader::Read(size_t n, Slice* result, char* scratch) {  in Read()  argument
43       r = buf.Read(scratch, offset_advance,  in Read()
46     *result = Slice(scratch, r);  in Read()
49     s = file_->Read(n, IOOptions(), result, scratch, nullptr);  in Read()
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()
100       *result = Slice(scratch, cached_len);  in Read()
108       s = file_->Read(n, opts, result, scratch + cached_len, dbg);  in Read()
111         *result = Slice(scratch, cached_len + result->size());  in Read()
121       TryReadFromCache(n, &remaining_len, scratch + cached_len);  in Read()
122       *result = Slice(scratch, cached_len + remaining_len);  in Read()
155                           Slice* result, char* scratch,  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
182     memcpy(scratch, buffer_.BufferStart() + offset_in_buffer, *cached_len);  in TryReadFromCache()