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bb-r775d-bm_tops20_ks_upd_4
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sources/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