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 %TITLE 'MCGETLIN - get a text line'
MODULE MCGETLIN (				! Get a text line
		IDENT = '3-001'			! File: MCGETLIN.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:
!
!	Get a text line.
!
! 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$$GET_TXTLN  from module MOVCUR.
! 1-002	- Regularize headers.  JBS 11-Mar-1981
! 1-003 - Put edt$$tst_eob in line. STS 22-Sep-1982
! 3-001 - Add updates from V3 sources.  GB 03-May-1983
!--

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

REQUIRE 'EDTSRC:TRAROUNAM';

FORWARD ROUTINE
    EDT$$GET_TXTLN : NOVALUE;

!
! INCLUDE FILES:
!

REQUIRE 'EDTSRC:EDTREQ';

!
! MACROS:
!
!	NONE
!
! EQUATED SYMBOLS:
!
!	NONE
!
! OWN STORAGE:
!
!	NONE
!
! EXTERNAL REFERENCES:
!
!	In the routine
%SBTTL 'EDT$$GET_TXTLN  - get a text line'

GLOBAL ROUTINE EDT$$GET_TXTLN 			! Get a text line
    : NOVALUE =

!++
! FUNCTIONAL DESCRIPTION:
!
!	This routine fectches the current line from the work file into the
!	current line buffer.  The pointer LN_PTR  is updated to
!	point to the cursor position and LN_END  and LN_LEN
!	are intitialized.  A carriage return character is placed after the
!	last character in the buffer to facilitate search operations.
!
! FORMAL PARAMETERS:
!
!	NONE
!
! IMPLICIT INPUTS:
!
!	CUR_BUF
!	LN_BUF
!	WK_LN
!
! IMPLICIT OUTPUTS:
!
!	LN_CHGD
!	LN_PTR
!	LN_END
!	LN_LEN
!
! ROUTINE VALUE:
!
!	NONE
!
! SIDE EFFECTS:
!
!	NONE
!
!--

    BEGIN

    EXTERNAL ROUTINE
	EDT$$RD_CURLN;

    EXTERNAL
	LN_CHGD,				! Indicates current line has changed.
	CUR_BUF : REF TBCB_BLOCK,	! Current text buffer
	LN_BUF,				! Current line buffer.
	LN_PTR,				! Current character pointer.
	LN_END,				! End of current line pointer.
	LN_LEN,				! Length of current line.
    	EOB_LN,
	WK_LN : REF LIN_BLOCK;		! Current line pointer.

!+
! Make sure the current line is accessable.
!-
    EDT$$RD_CURLN ();
!+
! Check for end of buffer.
!-

    IF (.WK_LN EQLA EOB_LN)
    THEN
	LN_LEN = 0
    ELSE
	BEGIN
!+
! Get the length and move that many characters.
!-
	LN_LEN = .WK_LN [LIN_LENGTH];
	CH$MOVE (.LN_LEN, CH$PTR (WK_LN [LIN_TEXT], 0, BYTE_SIZE),
	    CH$PTR (LN_BUF, 0, BYTE_SIZE));
	END;

!+
! Set up the end of line pointer.
!-
    LN_END = CH$PTR (LN_BUF, .LN_LEN, BYTE_SIZE);
!+
! Place a CR at the end of the line.
!-
    CH$WCHAR (ASC_K_CR, .LN_END);
!+
! Set up the cursor pointer to point to the current character.
!-
    LN_PTR = CH$PTR (LN_BUF, .CUR_BUF [TBCB_CHAR_POS], BYTE_SIZE);
!+
! And mark the current line as unchanged.
!-
    LN_CHGD = 0;
    END;


END
ELUDOM