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   sci.math.symbolic      Symbolic algebra discussion      10,432 messages   

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   Message 8,768 of 10,432   
   James Kuyper to James Kuyper   
   Re: Test for overflow   
   30 Mar 15 13:32:40   
   
   XPost: comp.lang.c   
   From: jameskuyper@verizon.net   
      
   On 03/30/2015 01:20 PM, James Kuyper wrote:   
   ...   
   > y=x. Therefore, your test will misclassify some of the values of tvalue   
   > in that range. It will also mishandle ULLONG_MAX*base if ULLONG_MAX%base==0.   
      
   For ULLONG_MAX == 0xFFFFFFFFFFFFFFFF, the minimum permitted value, that   
   applies to base==3, base==5, base==15, and base==17.   
      
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