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 %TITLE 'WFOPNBUF - open a text buffer'
MODULE WFOPNBUF (				! Open a text buffer
		IDENT = '3-001'			! File: WFOPNBUF.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:
!
!	Open (or create) a text 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$$NEW_BUF  from module EDTWF.
! 1-002	- Regularized headers.  JBS 25-Feb-1981
! 1-003	- Fix module name.  JBS 19-Mar-1981
! 1-004 - Put edt$$wf_nxt_buk in line. STS 11-Oct-1982
!--

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

REQUIRE 'EDTSRC:TRAROUNAM';

FORWARD ROUTINE
    EDT$$NEW_BUF : NOVALUE;

!
! INCLUDE FILES:
!

REQUIRE 'EDTSRC:EDTREQ';

!
! MACROS:
!
!	NONE
!
! EQUATED SYMBOLS:
!
!	NONE
!
! OWN STORAGE:
!
!	NONE
!
! EXTERNAL REFERENCES:
!
!	In the routine
%SBTTL 'EDT$$NEW_BUF  - open (or create) a text buffer'

GLOBAL ROUTINE EDT$$NEW_BUF 			! Open (or create) a text buffer
    : NOVALUE =

!++
! FUNCTIONAL DESCRIPTION:
!
!	This routine opens (or creates) a text buffer.  The text buffer
!	has originally no lines, but may have an associated input file.
!	CUR_BUF  is initialized to reflect this state.
!
! FORMAL PARAMETERS:
!
!	NONE
!
! IMPLICIT INPUTS:
!
!	NONE
!
! IMPLICIT OUTPUTS:
!
!	CUR_BUF
!
! ROUTINE VALUE:
!
!	NONE
!
! SIDE EFFECTS:
!
!	NONE
!
!--

    BEGIN

    EXTERNAL ROUTINE
	EDT$$WF_NEWBUK : NOVALUE,
	EDT$$RD_ILN;

    EXTERNAL
    	WK_AVAIL,
    	WK_GRTSTBUK,
	CUR_BUF : REF TBCB_BLOCK;	! Current text buffer control block

    IF .WK_AVAIL NEQ 0
    THEN
        BEGIN
    	CUR_BUF [TBCB_FIRST_BUKT] = .WK_AVAIL;
        CUR_BUF [TBCB_LAST_BUKT] = .WK_AVAIL;
    	END
    ELSE
    	BEGIN
    	CUR_BUF [TBCB_FIRST_BUKT] = .WK_GRTSTBUK;
        CUR_BUF [TBCB_LAST_BUKT] = .WK_GRTSTBUK;
    	END;
    
    EDT$$WF_NEWBUK (0, 0);
    EDT$$RD_ILN ();
    END;


END
ELUDOM