The TPU$EDIT routine builds a command string from its parameters
    and passes it to the TPU$TPU routine.

    TPU$EDIT is another entry point to the DECTPU simplified callable
    interface.

    Format

      TPU$EDIT  input ,output

1  –  Returns

    OpenVMS usage:cond_value
    type:         longword (unsigned)
    access:       write only
    mechanism:    by value

    Longword condition value. Most utility routines return a
    condition value in R0. Condition values that this routine can
    return are listed under Condition Values Returned.

2  –  Arguments

 input

    OpenVMS usage:char_string
    type:         character string
    access:       read only
    mechanism:    by descriptor
    Input file name. The input argument is the address for a
    descriptor of a file specification.

 output

    OpenVMS usage:char_string
    type:         character string
    access:       read only
    mechanism:    by descriptor
    Output file name. The output argument is the address for a
    descriptor of an output file specification. It is used with the
    /OUTPUT command qualifier.

3  –  Description

    This routine builds a command string and passes it to TPU$TPU. If
    the length of the output descriptor is nonzero, then the /OUTPUT
    qualifier is added to the command string. The /OUTPUT qualifier
    causes a file to be written to the specified file even if no
    modifications are made to the input file. If the QUIT built-
    in procedure is called, it prompts the user as if changes had
    been made to the buffer. This allows applications to check for
    the existence of the output file to see if the editing session
    was terminated, which is consistent with other OpenVMS callable
    editors.

    If your application parses information that is not related to the
    operation of DECTPU, make sure the application obtains and uses
    all non-DECTPU parse information before the application calls
    TPU$EDIT. Your application must do this because TPU$EDIT destroys
    all parse information obtained and stored before TPU$EDIT is
    called.

4  –  Condition Values Returned

    This routine returns the same values as TPU$TPU.