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# Copyright(c) 1986 Association of Universities for Research in Astronomy Inc.
include <syserr.h>
include <mach.h>
# ENVGETD -- Fetch an environment variable and try to interpret its value
# as a double. Abort if variable is not found or cannot be converted to
# a number.
double procedure envgetd (varname)
char varname[ARB]
int ip
double dval
char val[MAX_DIGITS]
int ctod(), envfind()
errchk envfind, syserrs
begin
ip = 1
if (envfind (varname, val, MAX_DIGITS) > 0)
if (ctod (val, ip, dval) > 0)
return (dval)
call syserrs (SYS_ENVNNUM, varname)
end
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