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 %TITLE 'FCRLF - put a crlf in the format buffer'
MODULE FCRLF (				! Put a crlf in the format buffer
		IDENT = '3-003'			! File: FCRLF.BLI Edit: CJG3003
		) =
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:
!
!	Put a crlf in the format buffer.
!
! ENVIRONMENT:	Runs at any access mode - AST reentrant
!
! AUTHOR: Bob Kushlis, CREATION DATE: March 18, 1979
!
! MODIFIED BY:
!
! 1-001	- Original.  DJS 19-FEB-1981.  This module was created by
!	extracting routine EDT$$FMT_CRLF  from module FORMAT.
! 1-002	- Regularize headers.  JBS 05-Mar-1981
! 1-003	- Use the new formatting flags to control display at the bottom
!	   of the screen.  JBS 05-Jul-1982
! 1-004	- Stop the working message before printing the line.  JBS 07-Jul-1982
! 1-005	- Maintain the cursor position variables.  JBS 05-Oct-1982
! 1-006	- Be a little moe honest when maintaining the cursor position variables.  JBS 29-Oct-1982
! 3-001 - Use string pointers to manipulate CUR_BUF.  GB 14-Feb-1983
! 3-002 - Change method of moving FMT_BUF to prevent overlap problems. CJG 25-Mar-1983
! 3-003 - Add FMT_FREE to improve speed of format routines. CJG 11-Jan-1984
!--

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

REQUIRE 'EDTSRC:TRAROUNAM';

FORWARD ROUTINE
    EDT$$FMT_CRLF;

!
! INCLUDE FILES:
!

REQUIRE 'EDTSRC:EDTREQ';

!
! MACROS:
!
!	NONE
!
! EQUATED SYMBOLS:
!
!	NONE
!
! OWN STORAGE:
!
!	NONE
!
! EXTERNAL REFERENCES:
!
!	In the routine
%SBTTL 'EDT$$FMT_CRLF  - put a crlf in the format buffer'

GLOBAL ROUTINE EDT$$FMT_CRLF 			! Put a crlf in the format buffer
    =

!++
! FUNCTIONAL DESCRIPTION:
!
!	Terminate the current output line.  If we are in line mode, we can
!	just call EDT$$OUT_FMTBUF.  Otherwise there are two cases: normal
!	and displaying text at the bottom of the screen.  If things are
!	normal put a CR and LF into the format buffer.  Otherwise (we are in EXT)
!	just call EDT$$OUT_FMTBUF for the first line, but preceed subsequent lines
!	with CRLF.  If there is more than one line, flag that we need
!	"press return to continue" and a screen refresh when the operation
!	is complete.
!
! FORMAL PARAMETERS:
!
!	NONE
!
! IMPLICIT INPUTS:
!
!	FMT_WRRUT
!	FMT_BOT
!	FMT_LCNT
!	FMT_CUR
!	FMT_FREE
!	SCR_LNS
!
! IMPLICIT OUTPUTS:
!
!	FMT_LNPOS
!	FMT_LCNT
!	MSGFLG
!	TXT_ONSCR
!	FMT_FREE
!	FMT_CUR
!	PRV_LN
!	PRV_COL
!
! ROUTINE VALUE:
!
!	Same as EDT$$OUT_FMTBUF, or 1.
!
! SIDE EFFECTS:
!
!	NONE
!
!--

    BEGIN

    EXTERNAL ROUTINE
	EDT$$OUT_FMTBUF,		! Output the format buffer to the screen
	EDT$$STORE_FMTCH : NOVALUE,	! Store a character into the format buffer
	EDT$$TI_WRSTR,			! String output routine
	EDT$$STOP_WKINGMSG : NOVALUE;	! Stop the "working" message

    EXTERNAL
	FMT_LNPOS,			! The current column number
	FMT_WRRUT,			! Routine to call to write the buffer
	FMT_BOT,			! 1 = we are printing at the bottom of the screen
	FMT_LCNT,			! Number of lines printed at the bottom of the screen
	FMT_BUF : VECTOR [FMT_BUFLEN],	! Format buffer
	FMT_CUR,			! Current location in the format buffer
	FMT_FREE,			! Space left in format buffer
	MSGFLG,				! 1 = erase the message line on the next keystroke
	TXT_ONSCR,			! Text on screen: use "Press return to continue"
	PRV_COL,			! Cursor column
	PRV_LN,				! Cursor line
	SCR_LNS;			! Number of lines in the scrolling area

    LOCAL
	PTR,
	STATUS;

    EDT$$STOP_WKINGMSG ();

    IF (.FMT_WRRUT NEQA EDT$$TI_WRSTR)
    THEN
	BEGIN
!+
! Since we are effectively outputting a CR and LF, the column is set to
! zero and the line increases by one, but not below the bottom of the screen.
!-
	PRV_COL = 0;

	IF (.PRV_LN LSS .SCR_LNS)	!
	THEN
	    PRV_LN = MIN (.SCR_LNS - 1, .PRV_LN + 1)
	ELSE
	    PRV_LN = .PRV_LN + 1;

	STATUS = EDT$$OUT_FMTBUF ();
	END
    ELSE
	BEGIN

	IF .FMT_BOT
	THEN
	    BEGIN

	    IF (.FMT_LCNT EQL 0)
	    THEN
		BEGIN
!+
! This is the first line printed in the message area at the bottom
! of the screen.
!-
		STATUS = EDT$$OUT_FMTBUF ();
		FMT_LCNT = 1;
		MSGFLG = 1;
		END
	    ELSE
		BEGIN
		PTR = CH$PTR (FMT_BUF,, BYTE_SIZE);
!+
! This is the second line to go into the message area.  Preceed the text with a CRLF,
! and adjust the column and line counters, assuming that there are no cursor
! positioning sequences or control characters in the format buffer.
!-

		IF (.PRV_LN LSS .SCR_LNS)	!
		THEN
		    PRV_LN = MIN (.SCR_LNS - 1, .PRV_LN + 1)
		ELSE
		    PRV_LN = .PRV_LN + 1;

		PRV_COL = FMT_BUFLEN - .FMT_FREE;
		EDT$$CPY_STR (FMT_BUFLEN - 2, .PTR, CH$PTR (FMT_BUF, 2, BYTE_SIZE));
		CH$WCHAR_A (ASC_K_CR, PTR);
		CH$WCHAR_A (ASC_K_LF, PTR);
		FMT_CUR = CH$PLUS (.FMT_CUR, 2);
		FMT_FREE = .FMT_FREE - 2;
		STATUS = EDT$$OUT_FMTBUF ();
		FMT_LCNT = .FMT_LCNT + 1;
		TXT_ONSCR = 1;
		END;

	    END
	ELSE
	    BEGIN
!+
! This line is not being placed at the bottom of the buffer.
!-
	    PRV_COL = 0;

	    IF (.PRV_LN LSS .SCR_LNS)	!
	    THEN
		PRV_LN = MIN (.SCR_LNS - 1, .PRV_LN + 1)
	    ELSE
		PRV_LN = .PRV_LN + 1;

	    EDT$$STORE_FMTCH (ASC_K_CR);
	    EDT$$STORE_FMTCH (ASC_K_LF);
	    STATUS = 1;
	    END;

	FMT_LNPOS = 0;
	END;

    RETURN (.STATUS);
    END;					! of routine EDT$$FMT_CRLF


END
ELUDOM