This routine obtains an exact number of values from a parameter. Each value must be
within its own range of acceptable values supplied to the routine. Dynamic defaults may be
defined.
This routine is particularly useful for obtaining co-ordinate information, where each
co-ordinate has different bounds, and a series of calls to PAR_GDR0x would not permit
an arbitrary number of dimensions.
PARAM = CHARACTER
$\ast $ (
$\ast $ )
(Given)
The name of the parameter.
NVALS = INTEGER (Given)
The number of values needed.
Values will be requested until exactly this number (no more and no less) has been obtained.
DEFAUL( NVALS ) = ? (Given)
The suggested-default values for the parameter. No default will be
suggested when any of the DEFAUL elements is not within the range of acceptable values defined by
VMIN and VMAX for that value.
VMIN( NVALS ) = ? (Given)
The values immediately above a
range wherein each obtained value cannot lie. Thus if VMAX is greater than VMIN, VMIN is the
minimum allowed for the corresponding obtained value. However, should VMAX be less than VMIN,
all values are acceptable except those between VMAX and VMIN exclusive.
VMAX(
NVALS ) = ? (Given)
The values immediately below a range wherein each obtained value
cannot lie. Thus if VMAX is greater than VMIN, VMAX is the maximum allowed for the
corresponding obtained value. However, should VMAX be less than VMIN, all values are
acceptable except those between VMAX and VMIN exclusive.
NULL = LOGICAL (Given)
NULL controls the behaviour of this routine when the parameter is in the null state. If
NULL is .FALSE., this routine returns with STATUS=PAR__NULL. If NULL is .TRUE., the
returned VALUE takes the value of DEFAUL and, if the
MSG filtering level (see SUN/104) is
‘verbose’, a message informs the user of the value used for the parameter. The routine then
returns with STATUS=SAI__OK. This feature is intended for convenient handling of null
values. NULL should only be set to .TRUE. when the value of DEFAUL will always give a
reasonable value for the parameter.
VALUES( NVALS ) = ? (Returned)
The values associated
with the parameter. If STATUS is returned not equal to SAI__OK, VALUE takes the values
of DEFAUL.
STATUS = INTEGER (Given and Returned)
The global status.