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 %TITLE 'WFBOTTOM - bottom of buffer'
MODULE WFBOTTOM (				! Move to bottom of current buffer
		IDENT = '3-001'			! File: WFBOTTOM.BLI Edit: GB3001
		) =
BEGIN
!COPYRIGHT (c) DIGITAL EQUIPMENT CORPORATION 1981, 1988.  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 THAT IS NOT SUPPLIED BY DIGITAL.
!
!
!++
! FACILITY:	EDT -- The DEC Standard Editor
!
! ABSTRACT:
!
!	Move to the bottom of the current buffer.
!
! ENVIRONMENT:	Runs at any access mode - AST reentrant
!
! AUTHOR: Bob Kushlis, CREATION DATE: October 16, 1978
!
! MODIFIED BY:
!
! 1-001	- Original.  DJS 23-Feb-1981.  This module was created by
!	extracting routine EDT$$WF_BOT  from module EDTWF.
! 1-002	- Regularize headers.  JBS 16-Mar-1981
! 1-003	- Abort on control C.  JBS 04-Jan-1982
! 1-004	- Set a flag if control C actually aborts something.  JBS 24-May-1982
! 1-005	- Remove EDT$$SET_WKLN.  JBS 14-Sep-1982
! 1-006 - Check control C about once per second.   SMB 17-Sep-1982
! 1-007 - Go back to checking control C every record. STS 20-Sep-1982
! 1-008	- Keep TBCB_CUR_LIN accurate, for updating the select range.  JBS 28-Dec-198L
! 3-001 - Add updates from V3 sources.  GB 04-May-1983
!--

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

REQUIRE 'EDTSRC:TRAROUNAM';

FORWARD ROUTINE
    EDT$$WF_BOT : NOVALUE;

!
! INCLUDE FILES:
!

REQUIRE 'EDTSRC:EDTREQ';

!
! MACROS:
!
!	NONE
!
! EQUATED SYMBOLS:
!
!	NONE
!
! OWN STORAGE:
!
!	NONE
!
! EXTERNAL REFERENCES:
!
!	In the routine
%SBTTL 'EDT$$WF_BOT  - move to bottom of buffer'

GLOBAL ROUTINE EDT$$WF_BOT 			! Move to bottom of current buffer
    : NOVALUE =

!++
! FUNCTIONAL DESCRIPTION:
!
!	Move to the bottom of the current buffer.
!
! FORMAL PARAMETERS:
!
!	NONE
!
! IMPLICIT INPUTS:
!
!	CUR_BUF
!	WK_BUK
!
! IMPLICIT OUTPUTS:
!
!	CUR_BUF
!	CC_DONE
!	WK_LN
!
! ROUTINE VALUE:
!
!	NONE
!
! SIDE EFFECTS:
!
!	NONE
!
!--

    BEGIN

    EXTERNAL ROUTINE
	EDT$$WF_MAKECUR : NOVALUE,
	EDT$$RD_NXTLN,
	EDT$$CHK_CC;			! Check for a control C

    EXTERNAL
	CUR_BUF : REF TBCB_BLOCK,	! Current text buffer control block
	WK_BUK : 			! Pointer to current bucket
	    REF BLOCK [WF_BUKT_SIZE] FIELD (WFB_FIELDS),
	CC_DONE,			! Set to 1 if control C actually aborts something
	WK_LN : REF LIN_BLOCK;		! Pointer to work line

    LOCAL
	CONTROL_C,
	READ_STATUS;

!+
! Just read the last bucket in the buffer, then
! read lines until we can't read any more.
!-
    CUR_BUF [TBCB_CUR_BUKT] = .CUR_BUF [TBCB_LAST_BUKT];
    MOVELINE (CUR_BUF [TBCB_LINE_COUNT], CUR_BUF [TBCB_CUR_LIN]);
    EDT$$WF_MAKECUR (.CUR_BUF [TBCB_CUR_BUKT]);
    CUR_BUF [TBCB_LINE_ADDR] = .WK_BUK [WFB_END];
    CUR_BUF [TBCB_CHAR_POS] = 0;
    WK_LN = .WK_BUK + .CUR_BUF [TBCB_LINE_ADDR];

    DO
	BEGIN
	READ_STATUS = EDT$$RD_NXTLN ();

	IF .READ_STATUS
	THEN
	    BEGIN
	    CONTROL_C = EDT$$CHK_CC ();

	    IF .CONTROL_C THEN CC_DONE = 1;

	    END;

	END
    UNTIL (.CONTROL_C OR ( NOT .READ_STATUS));


    END;					! of routine EDT$$WF_BOT


END
ELUDOM