In the libtommath library documentation file, what does it mean by the
"default value of mp_digit being ISO C unsigned long data type, each
digit is 28 bits long" ? Shouldn't it be 32 bits? It shows 4 bytes
when I use sizeof and looking at the source code it seems to be
defined as
typedef unsigned long mp_digit
My guess is that it simplifies the internal code, when it comes to detecting things like overflow.
You would have to read the code, read the design documents, or ask on the forum dedicated to libtommath maintainers and developers.
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
I once thought that it would make overflow detection easier, but then I found out that it's easy anyway.
I use all 32-bits in my own one.
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Take answer, and post elsewhere -> About the digit size in libtommath - Dev Shed
If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
If at first you don't succeed, try writing your phone number on the exam paper.
