Intermec Janus 2020 Reference Manual - Im_Get_Length

im_get_length

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im_get_length

Purpose:

This function retrieves the length of the last input of the type selected. Use

this function after calling the im_receive_input function to get the data. The

length is saved when the call is initiated.

Syntax:

With Intrmecd_IO, Intrmecp_IO;

Use Intrmecd_IO, Intrmecp_IO;

function im_get_length (

origin : IN IM_ORIGIN

) return System.Word;

IN Parameter:

The origin parameter is one of these constants:

IM_LABEL_SELECT

Label selected

IM_KEYBOARD_SELECT Keypad selected

IM_COM1_SELECT

COM1 selected

IM_COM2_SELECT

COM2, scanner port selected (2010 and 2050)

IM_COM4_SELECT

COM4 selected (RF only)

OUT Parameter:

None.

Return Value:

This function retrieves the length of the last input read.

Notes:

For this function, all COM input is considered to be from the same source.

For example, if you call im_receive_input with IM_COM1_SELECT and

again with IM_COM4_SELECT, then a call to im_get_length with a source

of IM_COM1_SELECT returns the length of the message received from

COM4 because that was the last message read from a communications port.

You must install the Reader Wedge to use this function. For information on

loading RWTSR.EXE, see “Runtime Requirements” in Chapter 2, “Working

With Ada.”

See Also:

im_receive_input

Example

See example for im_receive_input.