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 %TITLE 'TIECHO - echo a character'
MODULE TIECHO (				! Echo a character
		IDENT = '3-001'			! File: TIECHO.BLI Edit: GB3001
		) =
BEGIN
!
!			  COPYRIGHT (c) 1981, 1985 BY
!	      DIGITAL EQUIPMENT CORPORATION, MAYNARD, MASS.
!		ALL RIGHTS RESERVED.
!
! THIS SOFTWARE IS FURNISHED UNDER A LICENSE AND MAY BE USED AND  COPIED
! ONLY  IN  ACCORDANCE  WITH  THE  TERMS  OF  SUCH  LICENSE AND WITH THE
! INCLUSION OF THE ABOVE COPYRIGHT NOTICE.  THIS SOFTWARE OR  ANY  OTHER
! COPIES  THEREOF MAY NOT BE PROVIDED OR OTHERWISE MADE AVAILABLE TO ANY
! OTHER PERSON.  NO TITLE TO AND OWNERSHIP OF  THE  SOFTWARE  IS  HEREBY
! TRANSFERRED.
!
! THE INFORMATION IN THIS SOFTWARE IS SUBJECT TO CHANGE  WITHOUT  NOTICE
! AND  SHOULD  NOT  BE  CONSTRUED  AS  A COMMITMENT BY DIGITAL EQUIPMENT
! CORPORATION.
!
! DIGITAL ASSUMES NO RESPONSIBILITY FOR THE USE OR  RELIABILITY  OF  ITS
! SOFTWARE ON EQUIPMENT WHICH IS NOT SUPPLIED BY DIGITAL.
!

!++
! FACILITY:	EDT -- The DEC Standard Editor
!
! ABSTRACT:
!
!	Echo a character on the echo line.
!
! ENVIRONMENT:	Runs at any access mode - AST reentrant
!
! AUTHOR: Bob Kushlis, CREATION DATE: June 9, 1979
!
! MODIFIED BY:
!
! 1-001	- Original.  DJS 18-FEB-1981.  This module was created by
!	extracting routine EDT$$TI_ECHOCH  from module TINPUT.
! 1-002	- Regularized headers.  JBS 24-Feb-1981
! 1-003	- Fix module name.  JBS 11-Mar-1981
! 1-004 - Modify for new error message coordination.  SMB 24-Jun-1982
! 1-005	- Don't update EDT$$G_PRV_COL, EDT$$FMT_CH is maintaining it.  JBS 05-Oct-1982
! 3-001 - Add updates from V3 sources. GB 03-May-1983
!--

%SBTTL 'Declarations'
!
! TABLE OF CONTENTS:
!

REQUIRE 'EDTSRC:TRAROUNAM';

FORWARD ROUTINE
    EDT$$TI_ECHOCH : NOVALUE;

!
! INCLUDE FILES:
!

REQUIRE 'EDTSRC:EDTREQ';

!
! MACROS:
!
!	NONE
!
! EQUATED SYMBOLS:
!
!	NONE
!
! OWN STORAGE:
!
!	NONE
!
! EXTERNAL REFERENCES:
!
!	In the routine
%SBTTL 'EDT$$TI_ECHOCH  - echo a character'

GLOBAL ROUTINE EDT$$TI_ECHOCH (			! Echo a character
    C						! Character to echo
    ) : NOVALUE =

!++
! FUNCTIONAL DESCRIPTION:
!
!	Echo a character on the echo line.  If the character is a control character
!	it is echoed as ^letter.  The echo flag is set to indicate that the line
!	will need to be erased in the future.
!
! FORMAL PARAMETERS:
!
!  C 			the character to be echoed.
!
! IMPLICIT INPUTS:
!
!	TIN_ECHOFLG
!	TIN_ECHOPOS
!
! IMPLICIT OUTPUTS:
!
!	TIN_ECHOFLG
!	TIN_ECHOPOS
!
! ROUTINE VALUE:
!
!	NONE
!
! SIDE EFFECTS:
!
!	NONE
!
!--

    BEGIN

    EXTERNAL ROUTINE
	EDT$$FMT_CH,
	EDT$$OUT_FMTBUF,
	EDT$$SC_POSCSIF;

    EXTERNAL
	KPAD,				! Are we in Keypad mode
	MESSAGE_LINE,			! Echo line
	TIN_ECHOFLG,			! Flag indicating character have been echoed
	TIN_ECHOPOS;			! Position on the echo line

    IF (.TIN_ECHOFLG EQL 0)
    THEN
!+
! For nokeypad commands do the echoing on the first message line
! otherwise echo on the last message line.
!-

	IF ( NOT .KPAD)
	THEN
	    EDT$$SC_POSCSIF (.MESSAGE_LINE, .TIN_ECHOPOS)
	ELSE
	    EDT$$SC_POSCSIF (.MESSAGE_LINE + 1, .TIN_ECHOPOS);

    IF (.C LSS %C' ')
    THEN
	BEGIN
	EDT$$FMT_CH (%C'^');
	TIN_ECHOPOS = .TIN_ECHOPOS + 1;
	C = .C + %C'@';
	END;

    EDT$$FMT_CH (.C);
    EDT$$OUT_FMTBUF ();
    TIN_ECHOPOS = .TIN_ECHOPOS + 1;
    TIN_ECHOFLG = 1;
    END;


END
ELUDOM