DEC Text Processing Utility Program Development

5.5 Executing DECTPU Programs

After using the TPU command, suppose you used the following statement to create a program called new_program:

TPU Statement: new_program := COMPILE (CURRENT_BUFFER);

You could then execute new_program by using the following statement after using the TPU command:

TPU Statement: EXECUTE (new_program);

You could also compile and execute the statements in the current buffer by using the following TPU statement after using the TPU command:

TPU Statement: EXECUTE (CURRENT_BUFFER);

You can enter, compile, and execute small DECTPU programs on the EVE command line. The following example shows a small program that you can enter after the TPU Statement: prompt.

TPU Statement: SET (TIMER, ON, "Executing");

The preceding command executes the program associated with the SET (TIMER) built-in procedure and causes the string "Executing" to be displayed at 1-second intervals when a long procedure is executing. The string is displayed in the last 15 spaces of the prompt area at 1-second intervals.

5.5.1 Procedure Execution

If you include procedure declarations as part of a program, the procedure is compiled and the procedure name is added to the DECTPU list of procedures when you execute the program. You invoke the procedure in one of the following ways:

•Enter the name of the compiled procedure after the TPU Statement: prompt from EVE.

•Call the procedure from within a program or another procedure.

5.5.2Process Suspension

To suspend a process, you can use Ctrl/C.

Pressing Ctrl/C causes DECTPU to stop the execution of a user-written program. You can also stop the execution of the following DECTPU built-in procedures with Ctrl/C:

•LEARN_BEGIN . . . LEARN_END (execution of a learn sequence)

•READ_FILE

•SEARCH

•WRITE_FILE

Caution

Because DECTPU does not journal Ctrl/C, using Ctrl/C may affect the accuracy of your keystroke journal file. In addition, Ctrl/C prevents completion of some built-in procedures, such as ERASE_RANGE, MOVE_ TEXT, and FILL. DECTPU behavior after such an interruption is unpredictable. Compaq recommends that you exit from the editor after pressing Ctrl/C to ensure that you do not lose any work because of an inaccurate keystroke journal file.

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Compaq AA-PWCBD-TE manual Procedure Execution, Process Suspension, TPU Statement newprogram = Compile Currentbuffer
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