[Click] ipprint.cc

[Homayara Akter]

Hi,
   
  Would anybody please tell me ,in ipprint.cc element 
   
  if (_contents > 0) {
    int amt = 3*_bytes + (_bytes/4+1) + 3*(_bytes/24+1) + 1;
      char *buf = sa.reserve(amt);
   
  here _bytes=15000
  what does amt do?
  what does store in buf ?
  what does sa.reserve() do ?
   
  Thanks in advance.
   
  Homayara
   

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