Pre-processing large mathematical expressions for gmp?

[Torbjorn Granlund]

Jim Skea <jimskea at gmail.com> writes:

  Does anyone know of a pre-processor that would take a long mathematical
  expression and convert it into the equivalent set of gmp function calls,
  creating any temporary variables as necessary?
  
  Something that would take, as a small example
  y = y + h6*(k1+2*k2+2*k3+k4)
  
   and produce
  
   mpf_mul_ui(t0, k3, 2);
   mpf_mul_ui(t1, k2, 2);
   mpf_add(t2,t0,t1);
   mpf_add(t3,t2,k1);
   mpf_add(t4,t3,k4);
   mpf_mul(t5,t4,h6);
   mpf_add(y, y, t5);
  
If you don't mind writing in C++, the GMP C++ wrapper (which is
distributed with GMP) will do this for you.

-- 
Torbjörn