Get some internal and machine parameters

CALL FFGET (CHOPT, IVALUE)

This subroutine returns some internal parameters of FFREAD as selected by the character variable CHOPT. Valid values and their meaning are:

LINP

return LUN for input

LOUT

return LUN for output

NBIT

number of bits per word

NCHW

number of characters per word

NBCH

number of bits per character

NCHK

number of characters per key

NBIT, NCHW and NBCH are machine constants.

The requested parameter is retuned in the integer variable IVALUE.