145     const size_t free = buf->Free();  in Append()  local
146     if (size <= free) {  in Append()
150       buf->Append(p, free);  in Append()
151       p += free;  in Append()
152       size -= free;  in Append()
359   size_t free = 0;  // compute the free space left in buffer  in ExpandBuffer()  local
361     free += bufs_[i]->Free();  in ExpandBuffer()
362     if (size <= free) {  in ExpandBuffer()
369   assert(free < size);  in ExpandBuffer()
372   while (free < size) {  in ExpandBuffer()
380     free += buf->Free();  in ExpandBuffer()
384   assert(free >= size);  in ExpandBuffer()