[Octave-bug-tracker] [bug #58795] ode15i and ode15s fail for Windows 32bit

[John W. Eaton]

Follow-up Comment #49, bug #58795 (project octave):

Gnulib has macros for checking whether integer operations overflow, or we
could (conditionally) use things like __builtin_mul_overflow to multiply
dimensions and check for overflow.

I recently noticed that one of the Octave dependencies (maybe it was
Sundials?) was using the portable snippets library for this job.  Perhaps we
could use that or at least borrow ideas from it.  See, for example, 
https://github.com/nemequ/portable-snippets/tree/master/safe-math

I hope we can refactor so that we limit the number of places where checks like
this are needed.

See also bug #58790.

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