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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) 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:
!
!	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