/*- * Copyright (c) 1980 The Regents of the University of California. * All rights reserved. * * This module is believed to contain source code proprietary to AT&T. * Use and redistribution is subject to the Berkeley Software License * Agreement and your Software Agreement with AT&T (Western Electric). */ #ifndef lint static char sccsid[] = "@(#)c_log.c 5.2 (Berkeley) 4/12/91"; #endif /* not lint */ #include "complex" c_log(r, z) complex *r, *z; { double log(), cabs(), atan2(); r->imag = atan2(z->imag, z->real); r->real = log( cabs(z->real, z->imag) ); }