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 %TITLE 'USSTRING - set search string'
MODULE USSTRING (				! Set search string
		IDENT = '1-007'			! File: USSTRING.BLI Edit: GB1007
		) =
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:
!
!	Set up the current search string.
!
! ENVIRONMENT:	Runs at any access mode - AST reentrant
!
! AUTHOR: Bob Kushlis, CREATION DATE: February 7, 1978
!
! MODIFIED BY:
!
! 1-001	- Original.  DJS 19-FEB-1981.  This module was created by
!	extracting routine EDT$$SET_SEASTR  from module UTIL.
! 1-002	- Regularize headers and don't store into the parameter list.  This change
!	   saves one word on the PDP-11.  JBS 11-Mar-1981
! 1-003 - Change the check for edt$$exct_match to consider wps.  STS 02-Oct-1981
! 1-004	- Add an error return.  JBS 04-May-1982
! 1-005	- Allow 0-length strings.  JBS 05-May-1982
! 1-006 - Don't upcase the search string; the match condition may be changed
!	before the string is used for the last time. JBS 16-Jul-1982
! 1-007 - Call CPY_STR with string pointers not addresses. GB 21-Mar-1983
!--

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

REQUIRE 'EDTSRC:TRAROUNAM';

FORWARD ROUTINE
    EDT$$SET_SEASTR;

!
! INCLUDE FILES:
!

REQUIRE 'EDTSRC:EDTREQ';

!
! MACROS:
!
!	NONE
!
! EQUATED SYMBOLS:
!
!	NONE
!
! OWN STORAGE:
!
!	NONE
!
! EXTERNAL REFERENCES:
!
!	In the routine
%SBTTL 'EDT$$SET_SEASTR  - set up search string'

GLOBAL ROUTINE EDT$$SET_SEASTR (		! Set up search string
    STRING, 					! Pointer to new search string
    LEN						! Its length
    ) =

!++
! FUNCTIONAL DESCRIPTION:
!
!	This routine sets up the search current search string.  If the parameter
!	is zero in length, the current search string is kept.
!
! FORMAL PARAMETERS:
!
!  STRING 		Pointer to the new search string.
!
!  LEN			Length of the new search string.
!
! IMPLICIT INPUTS:
!
!	NONE
!
! IMPLICIT OUTPUTS:
!
!	SEA_STR
!	SEA_STRLEN
!
! ROUTINE VALUE:
!
!	1 = success
!	0 = invalid string
!
! SIDE EFFECTS:
!
!	NONE
!
!--

    BEGIN

    EXTERNAL
	SEA_STR : BLOCK [CH$ALLOCATION (64, BYTE_SIZE)],	! Last search string.
	SEA_STRLEN;			! Length of above.

    LOCAL
	RET_VALUE;

    IF ((.LEN GTR 0) AND (.LEN LEQ 64))
    THEN
	BEGIN

	EDT$$CPY_STR (.LEN, .STRING, CH$PTR (SEA_STR,, BYTE_SIZE));
	SEA_STRLEN = .LEN;
	RET_VALUE = 1;
	END
    ELSE

	IF (.LEN EQL 0) THEN RET_VALUE = 1 ELSE RET_VALUE = 0;

    RETURN (.RET_VALUE);
    END;					! of routine EDT$$SET_SEASTR


END
ELUDOM