The Trim a Full Name to Fit into a Desired Output Field routine
    trims a full name to fit into a desired output field. The
    trimming preserves the most significant part of the full name.

    Format

      LIB$TRIM_FULLNAME  fullname, trimmed-nodename [,output-width]

                         [,resultant-length]

1  –  Returns

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

2  –  Arguments

 fullname

    OpenVMS usage:char_string
    type:         character string
    access:       read only
    mechanism:    by descriptor

    Full name to be trimmed. The fullname argument contains the
    address of a descriptor pointing to this full name string.

    The error LIB$_INVARG is returned if fullname contains an invalid
    full name, points to a null string, or contains more than 1024
    characters. The error LIB$_INVSTRDES is returned if fullname is
    an invalid descriptor.

 trimmed-nodename

    OpenVMS usage:char_string
    type:         character string
    access:       write only
    mechanism:    by descriptor

    Trimmed node name. The trimmed-nodename argument contains the
    address of a descriptor pointing to the trimmed node-name string.
    LIB$TRIM_FULLNAME writes the trimmed node name into the buffer
    pointed to by trimmed-nodename.

    The error LIB$_INVSTRDES is returned if trimmed-nodename is an
    invalid descriptor.

    The length field of the trimmed-nodename descriptor is not
    updated unless trimmed-nodename is a dynamic descriptor with a
    length less than the resultant trimmed node name. Refer to the
    OpenVMS RTL String Manipulation (STR$) Manual for dynamic string
    descriptor usage.

    The trimmed-nodename argument contains an unusable result when
    LIB$TRIM_FULLNAME returns in error.

 output-width

    OpenVMS usage:word_unsigned
    type:         word (unsigned)
    access:       read only
    mechanism:    by reference

    Field width desired for the trimmed node name. The output-width
    argument is the address of an unsigned word that contains this
    field width in bytes.

    If output-width is omitted, the current length of trimmed-
    nodename is used. If trimmed-nodename is not a fixed-length
    string, specify output-width to ensure that the desired width
    is used.

    If the lengths of both trimmed-nodename and output-width are
    specified, the length in output-width is used. In this case, if
    the current length of trimmed-nodename is smaller than the length
    of output-width, the output trimmed node name is truncated at the
    end, and the alternate successful status LIB$_STRTRU is returned.

 resultant-length

    OpenVMS usage:word_unsigned
    type:         word (unsigned)
    access:       write only
    mechanism:    by reference

    Length of the trimmed node name. The resultant-length argument
    is the address of an unsigned word that contains this length in
    bytes.

    The resultant-length argument contains an unusable result when
    LIB$TRIM_FULLNAME returns in error.