VAX_FLOAT

The VAX_FLOAT function performs one of two possible actions:

Determine, and optionally change, the default value for the VAX_FLOAT keyword to the OPEN procedures and the CALL_EXTERNAL function.
Determine if an open file unit has the VAX_FLOAT attribute set.

See the discussion of VAX floating-point conversion in and the VAX_FLOAT keyword to OPEN for more on the VAX floating-point conversion issue.

Calling Sequence

Result = VAX_FLOAT( [Default] )

Arguments

Default

Default is used to change the default value of the VAX_FLOAT keyword to the OPEN procedures and the CALL_EXTERNAL function. A value of 0 (zero) makes the default for those keywords False. A non-zero value makes the default True. Specifying Default in conjunction with the FILE_UNIT keyword will cause an error.

NOTE: If the FILE_UNIT keyword is not specified, the value returned from VAX_FLOAT is the default value before any change is made. This is the case even if Default is specified. This allows you to get the old setting and change it in a single operation.

Keywords

FILE_UNIT

Set this keyword equal to the logical file unit number (LUN) of an open file. VAX_FLOAT returns True (1) if the file was opened with the VAX_FLOAT attribute, or False (0) otherwise. Setting the FILE_UNIT keyword when the Default argument is specified will cause an error.

Example

To determine if the default VAX_FLOAT keyword value for OPEN and CALL_EXTERNAL is True or False:

default_vax_float = VAX_FLOAT()

To determine the current default value of the VAX_FLOAT keyword for OPEN and CALL_EXTERNAL and change it to True (1) in a single operation:

old_vax_float = VAX_FLOAT(1)

To determine if the file currently open on logical file unit 1 was opened with the VAX_FLOAT keyword set:

file_is_vax_float = VAX_FLOAT(FILE_UNIT=1)