Ciao, Il Mar, 23 Ottobre 2012 10:50 pm, Torbjorn Granlund ha scritto: > ni...@lysator.liu.se (Niels Möller) writes: > Torbjorn Granlund <t...@gmplib.org> writes:
> > It is tempting to let mpz_perfect_power_p > > return p, but unfortunately it has type 'int' which might be too > > Any suggestions for a new function interface? > mp_bitcnt_t mpz_perfect_power_p (mpz_t x); > > is mostly right. If x is a perfect power, return an exponent > 1, > otherwise zero. > > A disadvantage is that this is an incompatible change. A possible backward compatible interface is: "Returns zero if op is not a perfect power. Otherwise the exponent p is computed. The function returns p if it fits in an int, or -1 if it doesn't". Not exciting, but it always gives some information. Regards, Marco -- http://bodrato.it/papers/ _______________________________________________ gmp-devel mailing list gmp-devel@gmplib.org http://gmplib.org/mailman/listinfo/gmp-devel
