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 %TITLE 'CHMSELPOS - test position of select range'
MODULE CHMSELPOS (				! Test position of select range
		IDENT = '3-001'			! File: CHMSELPOS.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:
!
!	This module compares the current line to the select range.
!
! ENVIRONMENT:	Runs at any access mode - AST reentrant
!
! AUTHOR: Bob Kushlis, CREATION DATE: Unknown
!
! MODIFIED BY:
!
! 1-001	- Original.  DJS 04-Feb-1981.  This module was created by
!	extracting the routine EDT$$SEL_RNGPOS  from module CHANGE.BLI.
! 1-002	- Regularize headers.  JBS 03-Mar-1981
! 1-003	- Make some minor edits, for esthetics.  JBS 02-Jun-1981
! 1- 004 - Convert to new compare line number macro. STS 20-Oct-1982
! 1-005	- Maintain select information until screen udpate is done with it.  JBS 02-Dec-1982
! 3-001 - Add updates from V3 source kit.  GB 27-Apr-1983
!--

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

REQUIRE 'EDTSRC:TRAROUNAM';

FORWARD ROUTINE
    EDT$$SEL_RNGPOS;				! Compare the select line with the current line

!
! INCLUDE FILES:
!

REQUIRE 'EDTSRC:EDTREQ';

!
! MACROS:
!
!	NONE
!
! EQUATED SYMBOLS:
!
!	NONE
!
! OWN STORAGE:
!
!	NONE
!
! EXTERNAL REFERENCES:
!
!	In the routine
%SBTTL 'EDT$$SEL_RNGPOS  - test position of select range'

GLOBAL ROUTINE EDT$$SEL_RNGPOS 			! Test position of select range
    =

!++
! FUNCTIONAL DESCRIPTION:
!
!	This little routine returns a comparison between the select line
!	and the current line as follows:
!
!		-1  if the select is before the current line or there is no select
!		 0  if it is on the current line
!		 1  if it is after the current line
!
! 	This is useful, because, when text is changed, the select position is
! 	affected only if it is on or after the current line.
!
! FORMAL PARAMETERS:
!
!	NONE
!
! IMPLICIT INPUTS:
!
!	SEL_BUF
!	OLD_SEL
!	SEL_LN
!	CUR_BUF
!
! IMPLICIT OUTPUTS:
!
!	NONE
!
! ROUTINE VALUE:
!
!	-1  if the select is before the current line or there is no select
!	 0  if the select is on the current line
!	 1  if the select is after the current line
!
! SIDE EFFECTS:
!
!	NONE
!
!--

    BEGIN

    EXTERNAL ROUTINE
	EDT$$CMP_LNO;				! Compare line numbers

    EXTERNAL
	SEL_BUF,				! Pointer to select buffer.
	SEL_LN : LN_BLOCK,		! Relative line number of select.
	CUR_BUF : REF TBCB_BLOCK,	! The current buffer tbcb
	OLD_SEL;			! Pointer to old select buffer

    IF ((.SEL_BUF NEQA .CUR_BUF) AND (.OLD_SEL NEQA .CUR_BUF))
    THEN
	RETURN (-1)				! No select in this buffer
    ELSE
	RETURN (EDT$$CMP_LNO (SEL_LN, CUR_BUF [TBCB_CUR_LIN]));

    END;


END
ELUDOM