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MODULE diupor (ident = '253'
	%require ('DIUPATSWITCH')
		) =
begin

!	COPYRIGHT (C) DIGITAL EQUIPMENT CORPORATION 1986.
!	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:	PAT parser
!
! ABSTRACT:
!
!	PATPOR.BLI.  Portal routines to call the parser from DIU.
!
! ENVIRONMENT:
!
!	Bliss-32 or Bliss-36 with XPORT.
!
! AUTHOR:	C. Richardson, CREATION DATE: 31-Jan-85

! History:
!
!  253  Rename file to DIUPOR.
!       Gregory A. Scott 1-Jul-86
!
! 153	In PATPOR:  delete routine DIU$COPY_DESCRIPTION; DIUDO was its 
!       only user.
!	Sandy Clemens  12-May-86
!
!--

! INCLUDE FILES:

require 'DIUPATPROLOG';
library 'DIUPATLANGSP';
library 'DIUPATDATA';
require 'DIUPATPORTAL';
library 'DIUPATPARSER';
library 'BLI:XPORT';
library 'DIUACTION';

! Synthetic lexical tokens to control which grammar is parsed:

global

DESC_TOKEN: TKN_STR
preset (	[TKN_SYNTHETIC]	= TRUE,
		[TKN_LOCATOR]	= LSLOCAL_SYNTHETIC_LOCATOR,
		[TKN_TERM]	= T_PARSE_DESCRIPTION ),

TRANSFORM_TOKEN: TKN_STR
preset (	[TKN_SYNTHETIC]	= TRUE,
		[TKN_LOCATOR]	= LSLOCAL_SYNTHETIC_LOCATOR,
		[TKN_TERM]	= T_PARSE_TRANSFORM ),

! I/O block for file to be parsed:

file_for_input : $XPO_IOB (),

! Copy of filename being parsed, for error messages:

pinfile: $STR_DESCRIPTOR (),

! Source and destination record description roots, if parsing a transform:

srcrt,
dstrt;

GLOBAL ROUTINE DIU$SYNTAX_DESCRIPTION (file) =
!++
!
! FUNCTIONAL DESCRIPTION:
!
!	Parse a record description for syntax only.
!
! FORMAL PARAMETERS:
!
!	file		Pointer to descriptor containing file name.
!
! IMPLICIT INPUTS:
!
!	None
!
! IMPLICIT OUTPUTS:
!
!	None
!
! ROUTINE VALUE:
!
!	TRUE		description parsed
!	FALSE		description did not parse
!
! SIDE EFFECTS:
!
!	None
!
!--

BEGIN

LOCAL
    status;

IF NOT $XPO_OPEN (IOB = file_for_input, FILE_SPEC = .file, DEFAULT = '.DDL')
    THEN return FALSE;

$STR_DESC_INIT (DESCRIPTOR = pinfile, STRING = .file);

status = PAT$PARSER (DESC_TOKEN, TRUE, 0, TRUE, file_for_input);

$XPO_CLOSE (IOB = file_for_input);

RETURN .status;

END;

GLOBAL ROUTINE DIU$SYNTAX_TRANSFORM (file) =

!++
!
! FUNCTIONAL DESCRIPTION:
!
!	Parse a transform for syntax only.
!
! FORMAL PARAMETERS:
!
!	file		Pointer to descriptor containing file name.
!
! IMPLICIT INPUTS:
!
!	None
!
! IMPLICIT OUTPUTS:
!
!	None
!
! ROUTINE VALUE:
!
!	TRUE		transform parsed
!	FALSE		transform did not parse
!
! SIDE EFFECTS:
!
!	None
!
!--

BEGIN

LOCAL
    status;

IF NOT $XPO_OPEN (IOB = file_for_input, FILE_SPEC = .file, DEFAULT = '.TRA')
    THEN return FALSE;

$STR_DESC_INIT (DESCRIPTOR = pinfile, STRING = .file);

status = PAT$PARSER (TRANSFORM_TOKEN, TRUE, 0, TRUE, file_for_input);

$XPO_CLOSE (IOB = file_for_input);

RETURN .status;

END;

GLOBAL ROUTINE DIU$PARSE_DESCRIPTION (file, root) =

!++
!
! FUNCTIONAL DESCRIPTION:
!
!	Parse a record description.
!
! FORMAL PARAMETERS:
!
!	file		Pointer to descriptor containing file name.
!	root		Address to place root of record description tree
!
! IMPLICIT INPUTS:
!
!	None
!
! IMPLICIT OUTPUTS:
!
!	None
!
! ROUTINE VALUE:
!
!	TRUE		description parsed
!	FALSE		description did not parse
!
! SIDE EFFECTS:
!
!	None
!
!--

BEGIN

LOCAL
    status;

IF NOT $XPO_OPEN (IOB = file_for_input, FILE_SPEC = .file, DEFAULT = '.DDL')
    THEN return FALSE;

$STR_DESC_INIT (DESCRIPTOR = pinfile, STRING = .file);

status = PAT$PARSER (DESC_TOKEN, TRUE, .root, FALSE, file_for_input);

$XPO_CLOSE (IOB = file_for_input);

RETURN .status;

END;

GLOBAL ROUTINE DIU$PARSE_TRANSFORM (file, source, dest, root) =

!++
!
! FUNCTIONAL DESCRIPTION:
!
!	Parse a transform.
!
! FORMAL PARAMETERS:
!
!	file		Pointer to descriptor containing file name.
!	source		Root of source record description
!	dest		Root of destination record description
!	root		Address where to place root of completed transform
!
! IMPLICIT INPUTS:
!
!	None
!
! IMPLICIT OUTPUTS:
!
!	None
!
! ROUTINE VALUE:
!
!	TRUE		Transform parsed
!	FALSE		Transform did not parse
!
! SIDE EFFECTS:
!
!	None
!
!--

BEGIN

LOCAL
    status;

IF NOT $XPO_OPEN (IOB = file_for_input, FILE_SPEC = .file, DEFAULT = '.TRA')
    THEN return FALSE;

$STR_DESC_INIT (DESCRIPTOR = pinfile, STRING = .file);
srcrt = .source;
dstrt = .dest;

status = PAT$PARSER (TRANSFORM_TOKEN, TRUE, .root, FALSE, file_for_input);

$XPO_CLOSE (IOB = file_for_input);

RETURN .status;

END;

END
ELUDOM