92     size_t cached_len = 0;  in Read()  local
97     if (TryReadFromCache(n, &cached_len, scratch) &&  in Read()
98         (cached_len == n || buffer_.CurrentSize() < readahead_size_)) {  in Read()
100       *result = Slice(scratch, cached_len);  in Read()
103     n -= 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()
173   bool TryReadFromCache(size_t n, size_t* cached_len, char* scratch) {  in TryReadFromCache()  argument
176       *cached_len = 0;  in TryReadFromCache()
180     *cached_len = std::min(  in TryReadFromCache()
182     memcpy(scratch, buffer_.BufferStart() + offset_in_buffer, *cached_len);  in TryReadFromCache()
183     read_offset_ += *cached_len;  in TryReadFromCache()