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Trailing-Edge - PDP-10 Archives - bb-r775e-bm_tops20_ks_upd_5 - sources/edt/mcright.bli
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 %TITLE 'MCRIGHT - move cursor right'
MODULE MCRIGHT (				! Move cursor right
		IDENT = '1-002'			! File: MCRIGHT.BLI Edit: JBS1002
		) =
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:
!
!	Move the cursor to the right.
!
! ENVIRONMENT:	Runs at any access mode - AST reentrant
!
! AUTHOR: Bob Kushlis, CREATION DATE: September 9, 1979
!
! MODIFIED BY:
!
! 1-001	- Original.  DJS 19-FEB-1981.  This module was created by
!	extracting routine EDT$$CS_RIGHT  from module MOVCUR.
! 1-002	- Regularize headers.  JBS 11-Mar-1981
!--

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

REQUIRE 'EDTSRC:TRAROUNAM';

FORWARD ROUTINE
    EDT$$CS_RIGHT;

!
! INCLUDE FILES:
!

REQUIRE 'EDTSRC:EDTREQ';

!
! MACROS:
!
!	NONE
!
! EQUATED SYMBOLS:
!
!	NONE
!
! OWN STORAGE:
!
!	NONE
!
! EXTERNAL REFERENCES:
!
!	In the routine
%SBTTL 'EDT$$CS_RIGHT  - move cursor to right'

GLOBAL ROUTINE EDT$$CS_RIGHT 			! Move cursor to right
    =

!++
! FUNCTIONAL DESCRIPTION:
!
!	This routine moves the cursor one character to the right.  If the cursor
!	is positioned on the line terminator of the current line, it will move
!	down to the first character of the next line.
!
! FORMAL PARAMETERS:
!
!	NONE
!
! IMPLICIT INPUTS:
!
!	LN_PTR
!	LN_END
!
! IMPLICIT OUTPUTS:
!
!	LN_PTR
!
! ROUTINE VALUE
!
!	1 = move completed successfully
!	0 = move failed
!
! SIDE EFFECTS:
!
!	NONE
!
!--

    BEGIN

    EXTERNAL ROUTINE
	EDT$$CS_DWN;

    EXTERNAL
	LN_PTR,				! Current character pointer.
	LN_END;				! End of current line pointer.

!+
! Check for cursor at the line terminator.
!-

    IF CH$PTR_EQL (.LN_PTR, .LN_END)
    THEN
!+
! Cursor is on the line terminator, do an EDT$$CS_DWN .
!-
	RETURN (EDT$$CS_DWN ());

!+
! Cursor is not at the line terminator, move right one character.
!-
    LN_PTR = CH$PLUS (.LN_PTR, 1);
    RETURN (1);
    END;


END
ELUDOM