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Trailing-Edge - PDP-10 Archives - tops20-v7-ft-dist1-clock - 7-sources/diupdb.bli
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module DIUPDB (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:
!
! 	PATDEB.BLI is the parser debugger.
!
! ENVIRONMENT:	VAX/VMS user mode
!
! AUTHOR:  C. Mitchell, CREATION DATE:  25-Feb-80
!
! MODIFIED BY:
!
! 	Charlie Mitchell, 29-Oct-1981 : VERSION X1-001
! 001 -	Use PATDATA.
!
! 002 - C.Richardson 29-May-84 Remove VMS dependencies.
!
! 003 - C. Richardson Allow debug compilation without debug output
!	13 Aug 85
!
!--
!
! INCLUDE FILES:
!

require 'DIUPATPROLOG';                 ! BLISS extensions (for parser)

library 'DIUPATDEB';

library 'DIUPATDATA';                   ! PAT interface

library 'DIUPATLANGSP';                 ! Language Specific functions

library 'DIUPATPARSER';                 ! Parser driver

library 'DIUDEB';                       ! Debugging

library 'DIUPATTOKEN';                  ! for PAT$TOKEN_CURRENT_PTR

library 'BLI:XPORT';				! 002

%IF %BLISS (BLISS32) %THEN			! 002
require 'VMS';					! VMS interface
%ELSE						! 002
library 'DIUTPAMAC';                    !  Common Bliss TPARSE

external routine TPARSE;			! 002
%FI						! 002

%if PATBLSEXT_DEBUGGING %then
!
! TABLE OF CONTENTS OF INTERNAL ROUTINES:
!

forward routine
    HELP : novalue,
    SET_BREAK : novalue,
    SHOW_STATUS : novalue,
    SRCH : novalue,
    UP_CASE : novalue;
! MACROS:

macro
    TERM_TXT (TOKEN_NUM) =
	begin

	local
	    P : ref $STR_DESCRIPTOR ();					! 002

	P = PAT$DATA_SYMBOL_TEXT (TOKEN_NUM);
	.P [STR$A_POINTER]						! 002
	end
    %;

macro
    TERM_LEN (TOKEN_NUM) =
	begin

	local
	    P : ref $STR_DESCRIPTOR ();					! 002

	P = PAT$DATA_SYMBOL_TEXT (TOKEN_NUM);
	.P [STR$H_LENGTH]						! 002
	end
    %;

macro
    ACT_TXT (ACTION_NUM) =
%if PATBLSEXT_DEBUGGING %then
	begin

	local
	    P : ref $STR_DESCRIPTOR ();					! 002

	P = PAT$DATA_SEMACT_TEXT (ACTION_NUM);
	.P [STR$A_POINTER]						! 002
	end
%fi
    %;

macro
    ACT_LEN (ACTION_NUM) =
	begin

	local
	    P : ref $STR_DESCRIPTOR ();					! 002

	P = PAT$DATA_SEMACT_TEXT (ACTION_NUM);
	.P [STR$H_LENGTH]						! 002
	end
    %;
macro
    CUR_TKN_TXT =
	begin

	local
	    P : ref $STR_DESCRIPTOR ();					! 002

	if LS_IS_NON_TERM (LS_LEX_TERM (PAT$TOKEN_CURRENT_PTR))
	then
	    begin
	    P = LS_LEX_TEXT (PAT$TOKEN_CURRENT_PTR);
	    .P [STR$A_POINTER]						! 002
	    end
	else
	    TERM_TXT (LS_LEX_TERM (PAT$TOKEN_CURRENT_PTR))

	end
    %;

macro
    CUR_TKN_LEN =
	begin

	local
	    P : ref $STR_DESCRIPTOR ();					! 002

	if LS_IS_NON_TERM (LS_LEX_TERM (PAT$TOKEN_CURRENT_PTR))
	then
	    begin
	    P = LS_LEX_TEXT (PAT$TOKEN_CURRENT_PTR);
	    .P [STR$H_LENGTH]						! 002
	    end
	else
	    TERM_LEN (LS_LEX_TERM (PAT$TOKEN_CURRENT_PTR))

	end
    %;

macro
    CUR_LINENUM =
	begin
	LS_LEX_LINE_NUMBER (LS_LEX_LOCATOR (PAT$TOKEN_CURRENT_PTR))
	end
    %;
! EQUATED SYMBOLS:

literal
    CMD_NULL = 0,
    CMD_SET = 1,
    CMD_CANCEL = 2,
    CMD_GO = 3,
    CMD_HELP = 4,
    CMD_DEBUG = 5,
    CMD_EXIT = 6,
    CMD_SHOW = 7,
    !
    CMD_LAST = 7;

literal
    BOPT_NAME = 0,
    BOPT_LINE = 1,
    BOPT_ALL = 2,
    BOPT_STATE = 3,
    BOPT_INPUT = 4,
    !
    BOPT_LAST = 4;

literal
    SRCH_SHOW = 0,
    SRCH_SET_TRC = 1,
    SRCH_SET_BRK = 2,
    SRCH_CAN_TRC = 3,
    SRCH_CAN_BRK = 4,
    SRCH_SHOW_ALL = 5,
    !
    SRCH_LAST = 5;

bind
    SPACES = uplit %BLISS32 (byte)			! 002
	( rep 133 of %BLISS32 (byte) (%c' '));		! 002
! OWN STORAGE:

own
    PAT$DEB_WAS_CALLED : initial (FALSE);	! Set true when PAT$DEB has been called

own
    BRK_REDUCT_VEC : bitvector [PAT$DATA_MAX_TOKEN + 1],	! indexed by token number
    TRC_REDUCT_VEC : bitvector [PAT$DATA_MAX_TOKEN + 1],	! indexed by token number
    BRK_SEMACT_VEC : bitvector [PAT$DATA_MAX_SEMACT + 1],	! indexed by action number
    TRC_SEMACT_VEC : bitvector [PAT$DATA_MAX_SEMACT + 1];	! indexed by action number

own
    TRACE_ALL_F : initial (FALSE),		! Trace everything not being ignored
    BREAK_ALL_F : initial (FALSE);		! Break on all reductions

own
    BRK_STATE : initial (-1),			! State index to break on
    BRK_TKN_F : initial (FALSE),		! Break on input indicated in BRK_TKN_TXT
    BRK_TKN_WILD_F,				! Wildcard flag for input text
    BRK_TKN_TXT : vector [ch$allocation (132)],	! 002 Input text to break on
    BRK_TKN_LEN,				! Length of input to break on
    BRK_LINE_F : initial (FALSE),		! Break on input line indicated in BRK_LINENUM
    BRK_LINENUM,				! Break on this line
    SAVED_LINENUM : initial (-1);
global routine PAT$DEB_TOKEN (ACTUAL_PARSE) : novalue =

!++
!
! FUNCTIONAL DESCRIPTION:
!
!	PAT$DEB_TOKEN is called when the parser gets a new token
!	and handles tracing and breakpointing for tokens and line
!	numbers.  This routine is only called by the parser.
!
! FORMAL PARAMETERS:
!
!	ACTUAL_PARSE	TRUE if actual parse; FALSE if parse-ahead
!			during error recovery
!
! IMPLICIT INPUTS:
!
!	None.
!
! IMPLICIT OUTPUTS:
!
!	None.
!
! ROUTINE VALUE:
!
!	None.
!
! SIDE EFFECTS:
!
!	None.
!
!--

    begin

    local
	BREAK_TOKEN_F,
	BREAK_LINE_F;

    if not .PAT$DEB_WAS_CALLED then return;

    BREAK_TOKEN_F = FALSE;
    BREAK_LINE_F = FALSE;

    ! Check if this is a new line.  If so, check if a breakpoint
    ! is set on this line.

    if CUR_LINENUM neq .SAVED_LINENUM
    then
	begin
	SAVED_LINENUM = CUR_LINENUM;

	if .BRK_LINE_F and (CUR_LINENUM eql .BRK_LINENUM)
	    then BREAK_LINE_F = TRUE;

	end;

    ! Check if should break on this token

    if .BRK_TKN_F
    then

	if ch$eql (.BRK_TKN_LEN, ch$ptr(BRK_TKN_TXT), CUR_TKN_LEN, CUR_TKN_TXT)
	    then BREAK_TOKEN_F = TRUE;	! 002

    ! Trace and break if appropriate

    if .BREAK_TOKEN_F or .BREAK_LINE_F or .TRACE_ALL_F or .BREAK_ALL_F
    then
	begin
	PUT_ASCII (CUR_TKN_LEN, CUR_TKN_TXT);
	if not .ACTUAL_PARSE then PUT_MSG ('	parse-ahead');
	PUT_EOL ();
	end;

    if .BREAK_TOKEN_F
    then
	begin
	PUT_MSG ('Break at input token ');
	PUT_ASCII (CUR_TKN_LEN, CUR_TKN_TXT);
	PUT_EOL ();
	PAT$DEB ();
	end
    else

	if .BREAK_LINE_F
	then
	    begin
	    PUT_MSG ('Break at source line number ');
	    PUT_NUMBER (.BRK_LINENUM);
	    PUT_EOL ();
	    PAT$DEB ();
	    end;

    end;
global routine PAT$DEB_STATE (CURRENT_STATE, ACTUAL_PARSE) : novalue =

!++
!
! FUNCTIONAL DESCRIPTION:
!
!	PAT$DEB_STATE is called when the parser begins processing
!	a new state and handles tracing and breakpointing for
!	state numbers.  This routine is only called by the parser.
!
! FORMAL PARAMETERS:
!
!	CURRENT_STATE	Current state table index
!	ACTUAL_PARSE	TRUE if actual parse; FALSE if parse-ahead
!			during error recovery.
!
! IMPLICIT INPUTS:
!
!	None.
!
! IMPLICIT OUTPUTS:
!
!	None.
!
! ROUTINE VALUE:
!
!	None.
!
! SIDE EFFECTS:
!
!	None.
!
!--

    begin

    if not .PAT$DEB_WAS_CALLED then return;

    if .CURRENT_STATE eql .BRK_STATE
    then
	begin
	PUT_MSG ('  State index:  ');
	PUT_NUMBER (.CURRENT_STATE);
	if not .ACTUAL_PARSE then PUT_MSG ('	parse-ahead');
	PUT_EOL ();
	PUT_MSG ('Break at state index ');
	PUT_NUMBER (.CURRENT_STATE);
	PUT_EOL ();
	PAT$DEB ();
	end
    else
	if .TRACE_ALL_F or .BREAK_ALL_F
	then
	    begin
	    PUT_MSG ('  State index:  ');
	    PUT_NUMBER (.CURRENT_STATE);
	    PUT_EOL ();
	    end;
    end;
global routine PAT$DEB_REDUCE (TOKEN, ACTION_NUM, ACTUAL_PARSE) : novalue =

!++
!
! FUNCTIONAL DESCRIPTION:
!
!	PAT$DEB_REDUCE is called when the parser does a reduction
!	and handles tracing and breakpointing on reductions.
!	This routine is only called by the parser.
!
! FORMAL PARAMETERS:
!
!	TOKEN		Non-terminal on left hand side of production.
!	ACTION_NUM	Semantics action.
!	ACTUAL_PARSE	TRUE if actual parse; FALSE if parse-ahead
!			during error recovery.
!
! IMPLICIT INPUTS:
!
!	None.
!
! IMPLICIT OUTPUTS:
!
!	None.
!
! ROUTINE VALUE:
!
!	None.
!
! SIDE EFFECTS:
!
!	None.
!
!--

    begin

    local
	BREAK_REDUCT_F,
	BREAK_SEMACT_F,
	TRACE_REDUCT_F,
	TRACE_SEMACT_F,
	TRACE_STACK_F;

    if not .PAT$DEB_WAS_CALLED then return;

    ! Determine if trace/break on reduction or semantics action

    BREAK_REDUCT_F = .BREAK_ALL_F or .BRK_REDUCT_VEC [.TOKEN];
    TRACE_REDUCT_F = .TRACE_ALL_F or .TRC_REDUCT_VEC [.TOKEN] or .BREAK_REDUCT_F;
    BREAK_SEMACT_F = .BREAK_ALL_F or .BRK_SEMACT_VEC [.ACTION_NUM];
    TRACE_SEMACT_F = .TRACE_ALL_F or .TRC_SEMACT_VEC [.ACTION_NUM] or .BREAK_REDUCT_F;

    if .TRACE_REDUCT_F then PAT$DUMP_REDUCTION ();

    if not .ACTUAL_PARSE then PUT_MSG_EOL('			reduction during parse-ahead');

    if .TRACE_SEMACT_F and (.ACTION_NUM neq PAT_NULL)
    then
	begin
	PUT_MSG ('				--- Action:  ');
%if PATBLSEXT_DEBUGGING %then
	PUT_STRING (PAT$DATA_SEMACT_TEXT (.ACTION_NUM));
%fi
	PUT_EOL ();
	end;

    if .TRACE_REDUCT_F or .TRACE_SEMACT_F then PUT_EOL ();

    if .BREAK_REDUCT_F
    then
	begin
	PUT_MSG ('Break on reduction to ');
	PUT_STRING (PAT$DATA_SYMBOL_TEXT (.TOKEN));
	PUT_EOL ();
	PAT$DEB ();
	end
    else

	if .BREAK_SEMACT_F
	then
	    begin
	    PUT_MSG ('Break on semactics action ');
%if PATBLSEXT_DEBUGGING %then
	    PUT_STRING (PAT$DATA_SEMACT_TEXT (.ACTION_NUM));
%fi
	    PUT_EOL ();
	    PAT$DEB ();
	    end;

    end;
global routine PAT$DEB : novalue =

!++
!
! FUNCTIONAL DESCRIPTION:
!
!	?
!
! FORMAL PARAMETERS:
!
!	None.
!
! IMPLICIT INPUTS:
!
!	?
!
! IMPLICIT OUTPUTS:
!
!	?
!
! ROUTINE VALUE:
!
!	None.
!
! SIDE EFFECTS:
!
!	?
!
!--

    begin
%IF %BLISS (BLISS36) %THEN						! 002
routine									! 002
LIB$GET_INPUT (				! 002 get one line from input device
		get_str,		! 002 Input string, by descriptor
		prompt_str ): novalue = ! 002 prompt string, by descriptor

!++
!
! FUNCTIONAL DESCRIPTION:
!
!	Get one line from input device.  Mimics VMS LIB$GET_INPUT.
!
! FORMAL PARAMETERS:
!
!	get_str		XPORT descriptor to input string
!	prompt_str	XPORT descriptor to prompt string
!
! IMPLICIT INPUTS:
!
!	None.
!
! IMPLICIT OUTPUTS:
!
!	None.
!
! ROUTINE VALUE:
!
!	None.
!
! SIDE EFFECTS:
!
!	Reads input from the terminal.
!
!--

begin									! 002
map get_str: ref $str_descriptor ();					! 002
map prompt_str: ref $str_descriptor ();					! 002
register								! 002
    AC1 = 1,								! 002
    AC2 = 2,								! 002
    AC3 = 3;								! 002
builtin									! 002
    jsys;								! 002
AC1 = %o'101';					! 002 .priou
AC2 = .prompt_str [str$a_pointer];		! 002 pointer to prompt string
AC3 = .prompt_str [str$h_length];		! 002 length of prompt string
JSYS (1, %o'532', AC1, AC2, AC3);		! 002 SOUTR JSYS (ycch!)
AC1 = .get_str [str$a_pointer];						! 002
AC2 = 132;								! 002
AC3 = .prompt_str [str$a_pointer];					! 002
JSYS (1, %o'523', AC1, AC2, AC3);		! 002 RDTTY JSYS (ugh!)
get_str [str$h_length] = 130 - .AC2<0,18>;	! 002 Subtract off <CRLF>
end;									! 002
%FI									! 002
    own
	PROMPT :$str_descriptor (string='PAT$DEB>'),			! 002
	CMD_DESC : $str_descriptor ();					! 002

    local
	STATUS;

    forward routine
	SAVE_BOPT;

! Note that the tparse macros define their own psect which cannot
! be referenced within the Ada compiler if word relative addressing
! is used for non-external references.

%BLISS32 (								! 002
    switches addressing_mode (nonexternal = long_relative);
)									! 002

    own
	COMMAND,
	BREAK_F,
	CMD_STRING : $str_descriptor (),				! 002
%if %bliss (bliss36) %then
	CMD_TEXT : vector [ch$allocation (132)],			! 002
%fi
	CMD_NUMBER,
	BREAK_OPT,
	SHOW_ALL_F,
	WILD_F;

    own
	TPARSE_BLOCK : block [TPA$K_LENGTH0 %BLISS32 (, byte)];	! 002
!	The following table is used by TPARSE to parse debugger commands.

    $INIT_STATE(CMDLINE	%BLISS32 (,CMDLINEKEY));			! 002
    $STATE(START,
	(  'SET'	,SETCAN	,,CMD_SET	,COMMAND	),
	(  'SHOW'	,OPTSHO	,,CMD_SHOW	,COMMAND	),
	(  'CANCEL'	,SETCAN	,,CMD_CANCEL	,COMMAND	),
	(  'GO'		,DONE	,,CMD_GO	,COMMAND	),
	(  '?'		,DONE	,,CMD_HELP	,COMMAND	),
	(  'HELP'	,DONE	,,CMD_HELP	,COMMAND	),
	(  'DBG'	,DONE	,,CMD_DEBUG	,COMMAND	),
	(  'DEBUG'	,DONE	,,CMD_DEBUG	,COMMAND	),
	(  'EXIT'	,DONE	,,CMD_EXIT	,COMMAND	),
	(  TPA$_LAMBDA	,DONE			)
	);
    $STATE(DONE,
	(  TPA$_BLANK	,TPA$_EXIT	),
	(  TPA$_EOS	,TPA$_EXIT	)
	);
    $STATE(SETCAN,
	(  'BREAKPOINT'	,BOPT	,,TRUE		,BREAK_F	),
	(  'TRACEPOINT'	,BOPT	)
	);
    $STATE(BOPT,
	(  'ALL'	,DONE	,SAVE_BOPT	,,		,BOPT_ALL   ),
	(  'SYMBOL'	,SINPUT	,SAVE_BOPT	,,		,BOPT_NAME  ),
	(  'LINE'	,SNUM	,SAVE_BOPT	,,		,BOPT_LINE  ),
	(  TPA$_DECIMAL	,DONE	,SAVE_BOPT	,,CMD_NUMBER	,BOPT_LINE  ),
	(  'STATE'	,SNUM	,SAVE_BOPT	,,		,BOPT_STATE ),
	(  'INPUT'	,SINPUT	,SAVE_BOPT	,,		,BOPT_INPUT )
	);
    $STATE(SINPUT,
	(  TPA$_SYMBOL	,WILD	,		,,CMD_STRING	)
	);
    $STATE(SNUM,
	(  TPA$_DECIMAL	,DONE	,		,,CMD_NUMBER	)
	);
    $STATE(OPTSHO,
	(  'ALL'	,DONE	,,TRUE		,SHOW_ALL_F	),
	(  'SYMBOL'	,SINPUT		),
	(  TPA$_LAMBDA	,DONE		)
	);
    $STATE(WILD,
	(  '*'		,DONE	,,TRUE		,WILD_F	),
	(  TPA$_LAMBDA	,DONE			)
	);
    routine SAVE_BOPT				! 002
%BLISS36 ( (ap) ) =				! 002

!++
!
! FUNCTIONAL DESCRIPTION:
!
!	?
!
! FORMAL PARAMETERS:
!
!	ap	Builtin AP register on VMS, otherwise a parameter
!
! IMPLICIT INPUTS:
!
!	?
!
! IMPLICIT OUTPUTS:
!
!	?
!
! ROUTINE VALUE:
!
!	TRUE
!
! SIDE EFFECTS:
!
!	None.
!
!--

	begin
%BLISS32 (					! 002

	builtin
	    ap;
)						! 002

	map
	    ap : ref block [%BLISS32 (, byte)];	! 002

	BREAK_OPT = .ap [TPA$L_PARAM];		! This is the parameter in the parse table
	return TRUE
	end;
! Start of code for PAT$DEB

    if not .PAT$DEB_WAS_CALLED
    then
	begin
	PUT_EOL ();
	! do this so don't lose the first line since IOS_COMMAND may not have been called yet
	PAT$DEB_WAS_CALLED = TRUE;
	end;

    TPARSE_BLOCK [TPA$V_ABBRFM] = TRUE;		! Allow abbreviations and match the first
    						! eligible transition if ambiguous

    while TRUE do
	begin
	COMMAND = 0;
	BREAK_F = FALSE;
	CMD_NUMBER = 1;
	$STR_DESC_INIT (DESCRIPTOR = CMD_STRING);			! 002
	BREAK_OPT = 0;
	SHOW_ALL_F = FALSE;
	WILD_F = FALSE;
	!
%if %bliss (bliss32) %then						! 002
	$STR_DESC_INIT (DESCRIPTOR = CMD_DESC, CLASS = DYNAMIC);	! 002
%else
	$STR_DESC_INIT (DESCRIPTOR = CMD_DESC,				! 002
	    STRING = (132, ch$ptr (CMD_TEXT)));				! 002
%fi
	LIB$GET_INPUT (CMD_DESC, PROMPT);
	UP_CASE (.CMD_DESC [STR$H_LENGTH], .CMD_DESC [STR$A_POINTER]);	! 002
	TPARSE_BLOCK [TPA$L_COUNT] = TPA$K_COUNT0;
	TPARSE_BLOCK [TPA$L_STRINGCNT] = .CMD_DESC [STR$H_LENGTH];	! 002
	TPARSE_BLOCK [TPA$L_STRINGPTR] = .CMD_DESC [STR$A_POINTER];	! 002
	STATUS =							! 002
	    %BLISS32 (LIB$TPARSE)					! 002
	    %BLISS36 (TPARSE)						! 002
		(TPARSE_BLOCK, CMDLINE %BLISS32 (, CMDLINEKEY));	! 002

	if .STATUS neq %BLISS32 (SS$_NORMAL) %BLISS36 (1)		! 002
	then
	    begin
	    PUT_MSG_EOL ('Parse error in command.  Please try again.');
	    end
	else
	    begin

	    case .COMMAND from 0 to CMD_LAST of
		set

		[CMD_NULL] :
		;

		[CMD_SET] :
		    SET_BREAK (TRUE, .BREAK_F, .BREAK_OPT, .WILD_F,	! 002
			.CMD_STRING [STR$H_LENGTH],			! 002
			.CMD_STRING [STR$A_POINTER], .CMD_NUMBER);	! 002

		[CMD_CANCEL] :
		    SET_BREAK (FALSE, .BREAK_F, .BREAK_OPT, .WILD_F,	! 002
			.CMD_STRING [STR$H_LENGTH],			! 002
			.CMD_STRING [STR$A_POINTER], .CMD_NUMBER);	! 002

		[CMD_GO] :
		    return;

		[CMD_HELP] :
		    HELP ();

		[CMD_DEBUG] :
%BLISS32 (						! 002
		    LIB$SIGNAL (SS$_DEBUG);		! 002
)							! 002
%BLISS36 (						! 002
		    return;				! 002
)							! 002

		[CMD_EXIT] :
%IF %BLISS (BLISS32) %THEN				! 002
		    $EXIT (code = SS$_NORMAL);
%ELSE							! 002
		    begin				! 002
		    builtin jsys;			! 002
		    jsys (0, %o'170');			! 002 HALTF JSYS (ugh!)
		    end;				! 002
%FI							! 002

		[CMD_SHOW] :
		    SHOW_STATUS (.SHOW_ALL_F, .WILD_F,			! 002
			.CMD_STRING [STR$H_LENGTH],			! 002
			.CMD_STRING [STR$A_POINTER]);			! 002

		[inrange, outrange] :
		    DEB_ASSERT (FALSE, 'Case error in PAT$DEB');
		tes;

	    end;

	end;

    end;
routine HELP : novalue =

!++
!
! FUNCTIONAL DESCRIPTION:
!
!	Prints HELP message for parser debugger.
!
! FORMAL PARAMETERS:
!
!	None.
!
! IMPLICIT INPUTS:
!
!	None.
!
! IMPLICIT OUTPUTS:
!
!	None.
!
! ROUTINE VALUE:
!
!	None.
!
! SIDE EFFECTS:
!
!	Displays HELP message on terminal.
!
!--

    begin

    macro
	MSGEOL =
	    %quote PUT_MSG_EOL %;
PUT_EOL();
MSGEOL('PAT$DEB commands follow.  Commands can be abbreviated freely with ');
MSGEOL('exception of set and show.  ("s" is the abbrev. for "set") ');
PUT_EOL();
MSGEOL('?				- gives this message ');
MSGEOL('help				- gives this message ');
PUT_EOL();
MSGEOL('set breakpoint		- one of the following');
MSGEOL('	all			- for all reductions ');
MSGEOL('	symbol NAME [*]		- at semantics action or reduction');
MSGEOL('				  to non-terminal specified by NAME ');
MSGEOL('				  The optional "*" indicates wildcarding.');
MSGEOL('	[line] INTEGER		- at source line number ');
MSGEOL('	input NAME [*]		- at source input NAME');
MSGEOL('	state INTEGER		- at state table index ');
PUT_EOL();
MSGEOL('set trace and cancel break/trace are similar to set break.');
PUT_EOL();
MSGEOL('show				- show status ');
MSGEOL('show all			- show status and all non-terminals');
MSGEOL('				  and semantics action symbols');
MSGEOL('show symbol NAME [*]		- show status semactics actions and');
MSGEOL('				  non-terminals specified by NAME');
PUT_EOL();
MSGEOL('go				- continue ');
MSGEOL('exit				- all done ');
MSGEOL('debug				- enter DEBUG-32 ');
MSGEOL('dbg				- enter DEBUG-32 ');
end;
routine SET_BREAK (SET_F, BREAK_F, BREAK_OPT, WILD_F, LEN, ADDR, CMD_NUMBER) : novalue =

!++
! FUNCTIONAL DESCRIPTION:
!
!	SET_BREAK sets (and cancels) tracepoints and breakpoints
!
! FORMAL PARAMETERS:
!
!	SET_F		- Set if true; cancel if false.
!
!	BREAK_F		- Set/cancel break if true, trace if false.
!
!	BREAK_OPT	- Option specified in command.
!
!	WILD_F		- True if wildcarding used for symbol in command.
!
!	LEN		- Length of symbol in command (if any).
!
!	ADDR		- Addr. of text of symbol in command.
!
!	CMD_NUMBER	- Number typed in command (if any).
!
! IMPLICIT INPUTS:
!
!	NONE
!
! IMPLICIT OUTPUTS:
!
!	NONE
!
! ROUTINE VALUE:
!
!	NONE
!
! SIDE EFFECTS:
!
!	NONE
!
!--

    begin

    case .BREAK_OPT from 0 to BOPT_LAST of
	set

	[BOPT_INPUT] :
	    begin

	    if .BREAK_F
	    then

		if .SET_F
		then
		    begin

		    if .BRK_TKN_F
		    then
			begin
			PUT_MSG ('	Cancelled previous breakpoint for input:  ');
			PUT_ASCII (.BRK_TKN_LEN, BRK_TKN_TXT);
			PUT_EOL ();
			end;

		    BRK_TKN_F = TRUE;
		    BRK_TKN_WILD_F = .WILD_F;
		    BRK_TKN_LEN = .LEN;
		    ch$move (.LEN, .ADDR, BRK_TKN_TXT);
		    PUT_MSG ('	Breakpoint set for source input:  ');
		    PUT_ASCII (.BRK_TKN_LEN, BRK_TKN_TXT);

		    if .BRK_TKN_WILD_F then PUT_MSG ('*');

		    PUT_EOL ();
		    end
		else
		    begin
		    PUT_MSG ('	Cancelled previous breakpoint for input:  ');
		    PUT_ASCII (.BRK_TKN_LEN, BRK_TKN_TXT);
		    PUT_EOL ();
		    end

	    else
		PUT_MSG_EOL ('Tracepoints not supported for input tokens');

	    end;

	[BOPT_NAME] :

	    if .SET_F
	    then 				! set

		if .BREAK_F
		then
		    SRCH (SRCH_SET_BRK, .WILD_F, .LEN, .ADDR)
		else
		    SRCH (SRCH_SET_TRC, .WILD_F,
			.LEN, .ADDR)

	    else 				! cancel

		if .BREAK_F
		then
		    SRCH (SRCH_CAN_BRK, .WILD_F, .LEN, .ADDR)
		else
		    SRCH (SRCH_CAN_TRC, .WILD_F,
			.LEN, .ADDR);

	[BOPT_LINE] :

	    if .BREAK_F
	    then

		if .SET_F
		then
		    begin

		    if .BRK_LINE_F
		    then
			begin
			PUT_MSG ('	Cancelled breakpoint for line number ');
			PUT_NUMBER (.BRK_LINENUM);
			PUT_EOL ();
			end;

		    BRK_LINE_F = TRUE;
		    BRK_LINENUM = .CMD_NUMBER;
		    PUT_MSG ('	Breakpoint set for line number ');
		    PUT_NUMBER (.BRK_LINENUM);
		    PUT_EOL ();
		    end
		else
		    begin
		    PUT_MSG_EOL ('Trace points not supported for source line numbers');
		    end;

	[BOPT_ALL] :

	    if .SET_F
	    then 				! set

		if .BREAK_F then BREAK_ALL_F = TRUE else TRACE_ALL_F = TRUE

	    else 				! cancel

		if .BREAK_F
		then
		    begin
		    BREAK_ALL_F = FALSE;

		    incr I from 0 to PAT$DATA_MAX_TOKEN do
			BRK_REDUCT_VEC [.I] = FALSE;

		    incr I from 0 to PAT$DATA_MAX_SEMACT do
			BRK_SEMACT_VEC [.I] = FALSE;

		    end
		else
		    begin
		    BREAK_ALL_F = FALSE;

		    incr I from 0 to PAT$DATA_MAX_TOKEN do
			TRC_REDUCT_VEC [.I] = FALSE;

		    incr I from 0 to PAT$DATA_MAX_SEMACT do
			TRC_SEMACT_VEC [.I] = FALSE;

		    end;

	[BOPT_STATE] :

	    if .BREAK_F
	    then

		if .SET_F
		then
		    begin

		    if .BRK_STATE geq 0
		    then
			begin
			PUT_MSG ('	Cancelled breakpoint for state index number ');
			PUT_NUMBER (.BRK_STATE);
			PUT_EOL ();
			end;

		    BRK_STATE = .CMD_NUMBER;
		    PUT_MSG ('	Breakpoint set for state index number ');
		    PUT_NUMBER (.BRK_STATE);
		    PUT_EOL ();
		    end
		else
		    begin
		    BRK_STATE = -1;
		    PUT_MSG ('	Cancelled breakpoint for line number ');
		    PUT_NUMBER (.BRK_LINENUM);
		    PUT_EOL ();
		    end

	    else
		begin
		PUT_MSG_EOL ('Trace points not supported for states');
		end;

	[inrange, outrange] :
	    DEB_ASSERT (FALSE, 'Case error in SET_BREAK');
	tes;

    end;
routine SHOW_STATUS (SHOW_ALL_F, WILD_F, LEN, ADDR) : novalue =

!++
!
! FUNCTIONAL DESCRIPTION:
!
!	Shows debugger status.
!
! FORMAL PARAMETERS:
!
!	SHOW_ALL_F		?
!	WILD_F			?
!	LEN			?
!	ADDR			?
!
! IMPLICIT INPUTS:
!
!	?
!
! IMPLICIT OUTPUTS:
!
!	?
!
! ROUTINE VALUE:
!
!	None.
!
! SIDE EFFECTS:
!
!	Displays status on terminal.
!
!--

    begin
    PUT_EOL ();

    if .BREAK_ALL_F then PUT_MSG_EOL ('	BREAK ALL') else PUT_MSG_EOL ('	no BREAK ALL');

    if .TRACE_ALL_F then PUT_MSG_EOL ('	TRACE ALL') else PUT_MSG_EOL ('	no TRACE ALL');

    if .BRK_STATE geq 0
    then
	begin
	PUT_MSG ('	Breakpoint set at state index number ');
	PUT_NUMBER (.BRK_STATE);
	PUT_EOL ();
	end
    else
	PUT_MSG_EOL ('	State index number breakpoint not set');

    if .BRK_TKN_F
    then
	begin
	PUT_MSG ('	Breakpoint set for source input:  ');
	PUT_ASCII (.BRK_TKN_LEN, BRK_TKN_TXT);
	PUT_EOL ();
	end
    else
	PUT_MSG_EOL ('	Source input breakpoint not set');

    if .BRK_LINE_F
    then
	begin
	PUT_MSG ('	Breakpoint set for source line number ');
	PUT_NUMBER (.BRK_LINENUM);
	PUT_EOL ();
	end
    else
	PUT_MSG_EOL ('	Source line number breakpoint not set');

    if .SHOW_ALL_F then SRCH (SRCH_SHOW_ALL, .WILD_F, .LEN, .ADDR) else SRCH (SRCH_SHOW, .WILD_F, .LEN, .ADDR)

    ;
    end;
routine SRCH (SRCH_TYPE, WILD_F, LEN, ADDR) : novalue =

!++
!
! FUNCTIONAL DESCRIPTION:
!
!	?
!
! FORMAL PARAMETERS:
!
!	SRCH_TYPE	?
!	WILD_F		?
!	LEN		?
!	ADDR		?
!
! IMPLICIT INPUTS:
!
!	?
!
! IMPLICIT OUTPUTS:
!
!	?
!
! ROUTINE VALUE:
!
!	None.
!
! SIDE EFFECTS:
!
!	?
!
!--

    begin

    local
	MATCH_F,
	FIRST_NONTRM_F,
	FIRST_SEMACT_F,
	FILL_LEN;

    literal
	MAX_SYM_LEN = 30;

    FIRST_NONTRM_F = TRUE;

    incr I from 0 to PAT$DATA_MAX_TOKEN do
	begin
	MATCH_F = FALSE;

	if .SRCH_TYPE eql SRCH_SHOW_ALL
	then
	    begin

	    if LS_IS_NON_TERM (.I) then MATCH_F = TRUE

	    end
	else

	    if .LEN leq 0
	    then
		begin

		if (.SRCH_TYPE eql SRCH_SHOW) and (.BRK_REDUCT_VEC [.I] or .TRC_REDUCT_VEC [.I])
		then

		    if LS_IS_NON_TERM (.I) then MATCH_F = TRUE

		end
	    else

		if LS_IS_NON_TERM (.I)
		then

		    if .WILD_F
		    then
			MATCH_F = ch$eql (.LEN, .ADDR, .LEN, TERM_TXT (.I))
		    else
			MATCH_F = ch$eql (.LEN, .ADDR, TERM_LEN (.I), TERM_TXT (.I));

	if .MATCH_F
	then
	    begin

	    if .FIRST_NONTRM_F
	    then
		begin
		FIRST_NONTRM_F = FALSE;
		PUT_EOL ();
		PUT_MSG_EOL ('	Non-terminal status:')
		end;

	    case .SRCH_TYPE from 0 to SRCH_LAST of
		set

		[SRCH_SHOW, SRCH_SHOW_ALL] :
		;

		[SRCH_SET_TRC] :
		    TRC_REDUCT_VEC [.I] = TRUE;

		[SRCH_SET_BRK] :
		    BRK_REDUCT_VEC [.I] = TRUE;

		[SRCH_CAN_TRC] :
		    TRC_REDUCT_VEC [.I] = FALSE;

		[SRCH_CAN_BRK] :
		    BRK_REDUCT_VEC [.I] = FALSE;
		tes;

	    PUT_MSG ('	');
	    PUT_STRING (PAT$DATA_SYMBOL_TEXT (.I));
	    FILL_LEN = MAX_SYM_LEN - TERM_LEN (.I);

	    if .FILL_LEN gtr 0 then PUT_ASCII (.FILL_LEN, SPACES);

	    if .BRK_REDUCT_VEC [.I] then PUT_MSG ('	break		') else PUT_MSG ('	no break 	');

	    if .TRC_REDUCT_VEC [.I] then PUT_MSG_EOL ('trace') else PUT_MSG_EOL ('no trace');

	    end;

	end;

    FIRST_SEMACT_F = TRUE;

    incr I from 0 to PAT$DATA_MAX_SEMACT do
	begin
	MATCH_F = FALSE;

	if .SRCH_TYPE eql SRCH_SHOW_ALL
	then
	    MATCH_F = TRUE
	else

	    if .LEN leq 0
	    then
		begin

		if (.SRCH_TYPE eql SRCH_SHOW) and (.BRK_SEMACT_VEC [.I] or .TRC_SEMACT_VEC [.I])
		then
		    MATCH_F = TRUE

		end
	    else

		if .WILD_F
		then
		    MATCH_F = ch$eql (.LEN, .ADDR, .LEN, ACT_TXT (.I))
		else
		    MATCH_F = ch$eql (.LEN, .ADDR, ACT_LEN (.I), ACT_TXT (.I));

	if .MATCH_F
	then
	    begin

	    if .FIRST_SEMACT_F
	    then
		begin
		FIRST_SEMACT_F = FALSE;
		PUT_EOL ();
		PUT_MSG_EOL ('	Semantics action status:')
		end;

	    case .SRCH_TYPE from 0 to SRCH_LAST of
		set

		[SRCH_SHOW, SRCH_SHOW_ALL] :
		;

		[SRCH_SET_TRC] :
		    TRC_SEMACT_VEC [.I] = TRUE;

		[SRCH_SET_BRK] :
		    BRK_SEMACT_VEC [.I] = TRUE;

		[SRCH_CAN_TRC] :
		    TRC_SEMACT_VEC [.I] = FALSE;

		[SRCH_CAN_BRK] :
		    BRK_SEMACT_VEC [.I] = FALSE;
		tes;

	    PUT_MSG ('	');
%if PATBLSEXT_DEBUGGING %then
	    PUT_STRING (PAT$DATA_SEMACT_TEXT (.I));
%fi
	    FILL_LEN = MAX_SYM_LEN - ACT_LEN (.I);

	    if .FILL_LEN gtr 0 then PUT_ASCII (.FILL_LEN, SPACES);

	    if .BRK_SEMACT_VEC [.I] then PUT_MSG ('	break		') else PUT_MSG ('	no break 	');

	    if .TRC_SEMACT_VEC [.I] then PUT_MSG_EOL ('trace') else PUT_MSG_EOL ('no trace');

	    end;

	end;

    if (.LEN gtr 0) and .FIRST_NONTRM_F and .FIRST_SEMACT_F
    then

	if .WILD_F
	then
	    begin
	    PUT_EOL ();
	    PUT_MSG_EOL ('No non-terminal or semantics action symbols starting with');
	    PUT_MSG ('	');
	    PUT_ASCII (.LEN, .ADDR);
	    PUT_MSG_EOL (' were found');
	    end
	else
	    begin
	    PUT_EOL ();
	    PUT_ASCII (.LEN, .ADDR);
	    PUT_MSG_EOL (' is not a non-terminal or semantics action');
	    end;

    end;
routine UP_CASE (LEN, STRING_P) : novalue =

!++
! FUNCTIONAL DESCRIPTION:
!
!	This routine converts a string to upper case.
!
! FORMAL PARAMETERS:
!
!	LEN - Length of string
!
!	STRING_P - Pointer to string
!
! IMPLICIT INPUTS:
!
!	NONE
!
! IMPLICIT OUTPUTS:
!
!	NONE
!
! ROUTINE VALUE:
!
!	NONE
!
! SIDE EFFECTS:
!
!	NONE
!
!--

    begin

    local								! 002
	ptemp;								! 002
    ptemp = .string_p;							! 002

    incr I from 0 to .LEN - 1 do
	begin								! 002
	if (ch$rchar(.ptemp) geq %c'a') and (ch$rchar(.ptemp) leq %c'z')! 002
	then
	    ch$wchar (ch$rchar (.ptemp)-%c' ', .ptemp);			! 002
	    ptemp = ch$plus (.ptemp, 1);				! 002
	end;								! 002
    end;

%else
    0		! Nothing from this module if not debugging
%fi

end						!End of module

eludom