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 %TITLE 'CHMFINENT - find page and paragraph entities'
MODULE CHMFINENT (				! Find page and paragraph entities
		IDENT = '1-004'			! File: CHMFINENT.BLI Edit: GB1004
		) =
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:
!
!	This module finds the page and paragraph entities.
!
! 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$$FND_ENT  from module CHANGE.BLI.
! 1-002	- Regularize headers.  JBS 02-Mar-1981
! 1-003	- Correct description of routine value.  JBS 01-Oct-1981
! 1-004 - Change handling of entities these are now count followed by ptr.  GB 24-Mar-1983
!--

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

REQUIRE 'EDTSRC:TRAROUNAM';

FORWARD ROUTINE
    EDT$$FND_ENT;				! Search for a page or paragraph entity

!
! INCLUDE FILES:
!

REQUIRE 'EDTSRC:EDTREQ';

!
! MACROS:
!
!	NONE
!
! EQUATED SYMBOLS:
!
!	NONE
!
! OWN STORAGE:
!
!	NONE
!
! EXTERNAL REFERENCES:
!
!	In the routine
%SBTTL 'EDT$$FND_ENT  - find page and paragraph entities'

GLOBAL ROUTINE EDT$$FND_ENT (			! Find page and paragraph entities
	ENT, 					! The entity to search for
	DIR, 					! The direction to search
	INC_DELIM				! Include delimiter in the found string
    ) =

!++
! FUNCTIONAL DESCRIPTION:
!
!	This routine is used to isolate the page and paragraph entities, which
!	are based upon a search string which must be found.
!
! FORMAL PARAMETERS:
!
!  ENT			The entity to search for
!
!  DIR			The direction to search
!
!  INC_DELIM		Include delimiter in the found string
!
! IMPLICIT INPUTS:
!
!	NONE
!
! IMPLICIT OUTPUTS:
!
!	NONE
!
! ROUTINE VALUE:
!
!	1 = found, 0 = not found, 2 = terminated by control C
!
! SIDE EFFECTS:
!
!	NONE
!
!--

    BEGIN

    EXTERNAL ROUTINE
	EDT$$STR_SEACMD,			! Search for a specific string
	EDT$$CS_BOTBUF,				! Move to bottom of buffer
	EDT$$CS_LEFT,				! Move left a character
	EDT$$CS_RIGHT,				! Move right a character
	EDT$$CS_TOP;				! Move to top of buffer

    EXTERNAL
	SEA_BEG;				! Leave search at begining if on

    LOCAL
	ENT_LEN,
	SAVE_BEGIN,
	SUCCEED;

!+
! Temporarily put us in BEGIN mode, so we position to the beginning
! of the entity delimiter.
!-
    SAVE_BEGIN = .SEA_BEG;
    SEA_BEG = 1;
!+
! If searching backward, move back the length of the delimiter before
! starting.
!-

    ENT_LEN = ..ENT;
    IF (.DIR EQL DIR_BACKWARD)
    THEN

	INCR I FROM 0 TO .ENT_LEN DO
	    EDT$$CS_LEFT ();

!+
! Do the search.
!-
    SUCCEED = EDT$$STR_SEACMD (.ENT + 1, .ENT_LEN, 0, .DIR);
!+
! Restore the BEGIN/END parameter.
!-
    SEA_BEG = .SAVE_BEGIN;
!+
! Check to see whether or not it was found.  If not then move
! to the top or bottom depending on the direction.  In this case
! we want to fail if we are already at top or bottom.
!-

    IF (.SUCCEED EQL 0)
    THEN
	BEGIN

	IF (.DIR EQL DIR_BACKWARD)
	THEN
	    BEGIN
	    SUCCEED = EDT$$CS_LEFT ();
	    EDT$$CS_TOP ();
	    END
	ELSE
	    BEGIN
	    SUCCEED = EDT$$CS_RIGHT ();
	    EDT$$CS_BOTBUF ();
	    END;

	END
    ELSE

	IF (.SUCCEED EQL 1)
	THEN

	    IF (.INC_DELIM NEQ 0)
	    THEN 				! include the delimiter.

		INCR I FROM 1 TO .ENT_LEN DO
		    EDT$$CS_RIGHT ();

    RETURN (.SUCCEED);
    END;


END
ELUDOM