GIZ, HIZ: two Fortran 77 routines for the computation of complex Scorer functions
Two Fortran 77 routines for the evaluation of Scorer functions of complex arguments $Gi(z)$, $Hi(z)$ and their derivatives are presented. The routines are based on the use of quadrature, Maclaurin series and asymptotic expansions. For real $z$ comparison with a previous code by A.J. MacLeod (J. Comput. Appl. Math. 53 (1994)) is provided.