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 %TITLE 'WFTOP - go to top of current buffer'
MODULE WFTOP (				! Go to top of current buffer
		IDENT = '1-002'			! File: WFTOP.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:
!
!	Go to the top 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$$TOP_BUF  from module EDTWF.
! 1-002	- Regularize headers.  JBS 19-Mar-1981
!--

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

REQUIRE 'EDTSRC:TRAROUNAM';

FORWARD ROUTINE
    EDT$$TOP_BUF : NOVALUE;

!
! INCLUDE FILES:
!

REQUIRE 'EDTSRC:EDTREQ';

!
! MACROS:
!
!	NONE
!
! EQUATED SYMBOLS:
!
!	NONE
!
! OWN STORAGE:
!
!	NONE
!
! EXTERNAL REFERENCES:
!
!	In the routine
%SBTTL 'EDT$$TOP_BUF  - go to top of current buffer'

GLOBAL ROUTINE EDT$$TOP_BUF 			! Go to top of current buffer
    : NOVALUE =

!++
! FUNCTIONAL DESCRIPTION:
!
!	Position to the top of the current buffer.
!
! FORMAL PARAMETERS:
!
!	NONE
!
! IMPLICIT INPUTS:
!
!	CUR_BUF
!	LNO_ZERO
!
! IMPLICIT OUTPUTS:
!
!	CUR_BUF
!
! ROUTINE VALUE:
!
!	NONE
!
! SIDE EFFECTS:
!
!	May read a bucket
!
!--

    BEGIN

    EXTERNAL ROUTINE
	EDT$$RD_CURLN : NOVALUE;

    EXTERNAL
	CUR_BUF : REF TBCB_BLOCK,	! Current text buffer control block
	LNO_ZERO : LN_BLOCK;

    LOCAL
	FIRST;

    CUR_BUF [TBCB_CUR_BUKT] = FIRST = .CUR_BUF [TBCB_FIRST_BUKT];
    CUR_BUF [TBCB_LINE_ADDR] = WFB_FIXED_SIZE;
    CUR_BUF [TBCB_CHAR_POS] = 0;
    MOVELINE (LNO_ZERO, CUR_BUF [TBCB_CUR_LIN]);
    EDT$$RD_CURLN ();
    END;


END
ELUDOM