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Trailing-Edge - PDP-10 Archives - bb-r775c-bm_tops20_ks_upd_3 - sources/comand.mac
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	TITLE	COMAND - COMMAND LINE PROCESSOR

;EDT$COMMAND

;IDENT = 1-005

;
;			  COPYRIGHT (C) 1983, 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 does the result parsing of the EDIT or EDT command.
;
; ENVIRONMENT:	TOPS-20 only
;
; AUTHOR: Chris Gill, Creation date: 24-Jan-1983
;
; MODIFIED BY:
; 1-001 - Original. CJG 24-Jan-1983
; 1-002 - Add fixes for using rescan and recognition. CJG 20-Jun-1983
; 1-003 - Change the way that filespecs are handled. CJG 22-Jun-1983
; 1-004 - Fix parsing of rescan text to allow CREATE etc. CJG 6-Jul-1983
; 1-005 - Fix parsing again because of funny prompting and defaults. CJG 12-Oct-1983
; 1-006 - Make some changes for the TRACE facility. CJG 21-Dec-1983
;--
	SUBTTL DECLARATIONS

	SALL
	TWOSEG
	RELOC	0

;
; TABLE OF CONTENTS:
;

	INTERN	COMAND

;
; INCLUDE FILES:
;
	SEARCH	MACSYM
	SEARCH	MONSYM
;
; MACROS:
;
	DEFINE	TAB(KEY,VAL<0>)<
	[ASCIZ \KEY\],,VAL
>

	DEFINE	COMND$(ARG)<
	MOVEI	A,CSB
	MOVEI	B,FDB'ARG
	COMND
	 ERJMP	ERROR
>

;
; EQUATED SYMBOLS:
;
	A=1				;Register names
	B=2
	C=3
	D=4
	E=5
	F=6
	P=17

;
; EXTERNAL REFERENCES:
;

	EXTERN	INPNAM	;CINP_NAM	Input file name pointer
	EXTERN	OUTNAM	;COUT_NAM	Output file name pointer
	EXTERN	CMDNAM	;CCMD_NAM	Command file name pointer
	EXTERN	JOUNAM	;CJOU_NAM	Journal file name pointer
	EXTERN	OPTION	;OPTIONS	Options mask

	EXTERN	GETFSP	;EDT$$GET_FILESPEC	Split filespec
	EXTERN	GTJBLK	;GETJFN_BLOCK
	EXTERN	$TRACE	;		Trace routines

;
; FLAG DEFINITIONS FOR OPTIONS WORD
;
	OP%REC=1B35			;/RECOVER
	OP%COM=1B34			;/COMMAND
	OP%NJO=1B33			;/NOJOURNAL
	OP%NOU=1B32			;/NOOUTPUT
	OP%NCM=1B31			;/NOCOMMAND
	OP%NCR=1B30			;/NOCREATE
	OP%NEW=1B29			;CREATE command

;
; OFFSETS INTO FILE DESCRIPTOR BLOCKS (SEE EDTREQ.REQ)
;

	D$LENG=0
	D$ADRS=0
	D$JFN=1
	D$DEV=2
	D$DIR=3
	D$NAME=4
	D$EXTN=5

;
; OWN STORAGE:
;
;	COMMAND STATE BLOCK

CSB:
	CM%XIF+REPARS			;Reparse address
	.PRIIN,,.PRIOU			;JFN's
	0				;Prompt text pointer
	POINT	7,TEXTBF		;Pointer to text buffer
	POINT	7,TEXTBF		;Pointer to next segment
	TXTBFL				;Length of text buffer
	TXTBFL
	POINT	7,ATOM			;Pointer to atom buffer
	ATOMLN				;Length of atom buffer
	GTJBLK				;GTJFN block

;
;	FUNCTION BLOCKS
;

FDBINI:	FLDDB.	.CMINI
FDBCMD:	FLDDB.	.CMKEY,<CM%SDH>,EDTABL	;Command keyword
FDBCMI:	FLDDB.	.CMIFI,,,,,FDBCMX	;Input filespec, Output if not found
FDBCMX:	FLDDB.	.CMOFI			;In case of CREATE
FDBCMN:	FLDDB.	.CMNOI,,<POINT 7,[ASCIZ /OUTPUT AS/]>
FDBCMO:	FLDDB.	.CMFIL,,,,,FDBCMS	;Output filespec
FDBCMS:	FLDDB.	.CMSWI,,SWTABL,,,FDBCMC	;Switches
FDBCMC:	FLDDB.	.CMCFM,CM%SDH
FDBFIL:	FLDDB.	.CMFIL,,,,,FDBCMC	;Filespecs in switches
FDBFLD:	FLDBK.	.CMFLD,,,,,FLDBRK	;Trace routine
FDBCOL:	FLDDB.	.CMTOK,,<POINT 7,[ASCIZ /:/]>
FDBNUX:	FLDDB.	.CMNUX,,^D10		;Number of stack items
FLDBRK:	BRMSK.	FLDB0.,FLDB1.,FLDB2.,FLDB3.,<%$_>

;
;	INITIAL COMMAND TABLE
;

EDTABL:	EDTL,,EDTL
	TAB	<CREATE>,<OP%NEW>
	TAB	<EDIT>,<0>
	TAB	<EDT>,<0>
	TAB	<MAKE>,<OP%NEW>		;Well, you never know!!

	EDTL=.-EDTABL-1

;
;	SWITCH TABLE
;

	SW%FIL==1B19			;Switch takes a filespec
	SW%NOT==1B20			;'NO' prefix

	SW%COM==0			;/[NO]COMMAND
	SW%JOU==1			;/[NO]JOURNAL
	SW%OUT==2			;/[NO]OUTPUT
	SW%REA==3			;/[NO]READONLY
	SW%REC==4			;/[NO]RECOVER
	SW%CRE==5			;/[NO]CREATE
	SW%TRC==6			;/TRACE

SWTABL:	SWTL,,SWTL
	TAB	<COMMAND>,<SW%FIL+SW%COM>
	TAB	<CREATE>,<SW%CRE>
	TAB	<JOURNAL>,<SW%FIL+SW%JOU>
	TAB	<NOCOMMAND>,<SW%NOT+SW%COM>
	TAB	<NOCREATE>,<SW%NOT+SW%CRE>
	TAB	<NOJOURNAL>,<SW%NOT+SW%JOU>
	TAB	<NOOUTPUT>,<SW%NOT+SW%OUT>
	TAB	<NOREADONLY>,<SW%NOT+SW%REA>
	TAB	<NORECOVER>,<SW%NOT+SW%REC>
	TAB	<OUTPUT>,<SW%FIL+SW%OUT>
	TAB	<READONLY>,<SW%REA>
	TAB	<RECOVER>,<SW%REC>
	XTRACE,,SW%TRC

	SWTL=.-SWTABL-1

XTRACE:	CM%FW!CM%INV
	ASCIZ	/TRACE/

;
;	TEXT AND ATOM BUFFERS
;

TEXTBF:
	BLOCK	^D40			;Text buffer
	TXTBFL=<.-TEXTBF>*5

ATOM:
	BLOCK	^D20			;Atom buffer
	ATOMLN=<.-ATOM>*5

;
;	Miscellaneous storage
;

CMDOPT:	BLOCK	1			;Implied options in command
TRACEX:	BLOCK	1			;Set if /TRACE used
TRCSTK:	BLOCK	1			;Set when trace file must be opened
	SUBTTL	SY%GCO - GET COMMAND LINE
	RELOC	400000

;++
; FUNCTIONAL DESCRIPTION:
;
; This routine parses the EDT command line returning the following information:
;
;	The input file name.
;
;	The output file name.
;
;	Whether or not journalling is specified and the explicit name if given.
;
;	Whether or not a command file was specified and the specific name if given.
;
; FORMAL PARAMETERS:
;
;	NONE
;
; IMPLICIT INPUTS:
;
;	NONE
;
; IMPLICIT OUTPUTS:
;
;	INPNAM - Input name block
;	OUTNAM - Output name block
;	CMDNAM - Command name block
;	JOUNAM - Journal name block
;
; ROUTINE VALUE
;
;	NONE
;
; SIDE EFFECTS:
;
;	Implicitly calls other routines in this module.
;
;--

COMAND:
	SETZM	CMDOPT			;Force all flags off
	CALL	CMDINI			;Init this routine
	SETZM	INPNAM+D$JFN
	SETZM	OUTNAM+D$JFN
	SETZM	JOUNAM+D$JFN
	SETZM	CMDNAM+D$JFN
	MOVEI	A,.RSINI
	RSCAN				;Get the rescan buffer
	 JFCL				; Don't care if empty etc.
	JUMPE	A,SYG.1			;If empty then prompt for input
	MOVE	A,[POINT 7,[0]]		;Set up a dummy ^R pointer
	MOVEM	A,CSB+.CMRTY		;So that we don't prompt the rescan
	COMND$	INI			;Init the COMND JSYS
	COMND$	CMD			;Parse the command line
	TXNE	A,CM%NOP		;If the command didn't parse
	 JRST	SYG.1			; Then request a filespec
	HRRZ	B,(B)			;Get flags
	MOVEM	B,OPTION		;Save the CREATE flag if set
	MOVEM	B,CMDOPT		;Also save as implied flag
	TXNN	A,CM%EOC		;If just EDIT or EDT etc.
	 JRST	SYG.2			; Then prompt normally

SYG.1:				;Prompt for the file specs

	MOVE	A,[POINT 7,[ASCIZ /File: /]]
	MOVEM	A,CSB+.CMRTY		;Set up the prompt
	COMND$	INI			;Init the COMND JSYS

SYG.2:				;Main loop for files and switches

	SKIPE	CMDOPT			;If CREATE
	 JRST	[COMND$	CMX		; Then look for an output file
		 TXNE	A,CM%NOP
		  JRST	INVCMD
		 JRST	SYG.3]		;And continue lower down
	COMND$	CMI			;Get the input filespec
	TXNE	A,CM%NOP		;If it didn't parse
	 JRST	INVCMD			; Then tell him
	PUSH	P,A			;Save for checks
	PUSH	P,B
	MOVEI	A,INPNAM
	PUSH	P,A
	CALL	GETFSP			;Sort out the filespec
	ADJSP	P,-2
	POP	P,A			;Restore the flags
	TXNE	A,CM%EOC		;If <CR> ended the field
	 JRST	SYG.7			; Then exit from here

				;Look for output filespec or switches

	COMND$	CMN			;See if there's a guide word
	TXNE	A,CM%NOP
	 JRST	INVCMD			; Invalid
	CALL	SWDF2			;Set default for output filespec
	COMND$	CMO
	TXNE	A,CM%NOP
	 JRST	INVCMD			; Invalid
	HRRZS	C			;Get the FDB address
	CAIN	C,FDBCMC		;Was it confirm?
	 JRST	SYG.7			; Yes
	CAIN	C,FDBCMS		;Was it a switch?
	 JRST	SYG.5			; Yes

SYG.3:				;Here from CREATE parsing

	PUSH	P,A			;No - output
	MOVEI	E,SW%FIL+2		;Pretend it was /OUTPUT:
	JRST	SYG.6A

SYG.4:				;Loop for switches

	COMND$	CMS
	TXNE	A,CM%NOP
	 JRST	INVCMD			; Invalid
	HRRZS	C
	CAIN	C,FDBCMC		;If confirm
	 JRST	SYG.7			; Then done now
	
SYG.5:				;Switch found

	PUSH	P,A			;Save the flags for later
	HRRZ	E,(B)			;Get the switch flags
	CAIN	E,SW%TRC		;If /TRACE
	 JRST	SYG.10			; Then special treatment
	TXNN	A,CM%SWT		;Was there a colon?
	 JRST	SYG.6			; No
	TRNN	E,SW%FIL		;Yes - should there be one?
	 JRST	[POP	P,A
		 JRST	INVSWT]		; No - error
	MOVE	B,E			;Get the switch number
	ANDI	B,7
	CALL	@[SWDF0			;/COMMAND
		  SWDF1			;/JOURNAL
		  SWDF2			;/OUTPUT
		  [RET]
		  [RET]			;Should never get here
		  [RET]](B)
	COMND$	FIL
	TXNE	A,CM%NOP		;OK?
	 JRST	[POP	P,A
		 JRST	INVCMD]		; No
	MOVEM	A,(P)			;Save the latest flags from COMND
	SKIPA				;Don't clear JFN

SYG.6:				;Dispatch to the right routine

	 SETZ	B,			;No JFN if no filespec

SYG.6A:

	MOVE	A,E			;Copy the flags
	ANDI	E,7
	CALL	@[CSWT0			;/COMMAND
		  CSWT1			;/JOURNAL
		  CSWT2			;/OUTPUT
		  CSWT3			;/READONLY
		  CSWT4			;/RECOVER
		  CSWT5](E)		;/CREATE
	ORM	F,OPTION		;Save the new option flags
	POP	P,A			;Restore the flags
	JRST	SYG.4			;Loop for more

SYG.7:				;Do final tidy up

	SKIPN	A,INPNAM		;Any input filespec?
	 SKIPE	CMDOPT			; No - should there be one?
	  CAIA				;  No - OK
	   JRST	SYG.1			;   No - loop to request it.
	MOVE	C,OPTION		;Pick up the options flags
	SKIPE	JOUNAM+D$NAME		;Was there a journal filespec?
	 JRST	SYG.8			; Yes
	TXNE	C,OP%NJO		;No - should there be one?
	 JRST	SYG.8			; No
	SKIPN	CMDOPT			;If CREATE
	 JRST	SYG.7A			;...
	PUSH 	P,OUTNAM+D$DEV		; Then use the output defaults
	PUSH	P,OUTNAM+D$DIR
	PUSH	P,OUTNAM+D$NAME
	JRST	SYG.7B

SYG.7A:	PUSH	P,INPNAM+D$DEV		;Set the journal file defaults
	PUSH	P,INPNAM+D$DIR
	PUSH	P,INPNAM+D$NAME

SYG.7B:	POP	P,JOUNAM+D$NAME
	POP	P,JOUNAM+D$DIR
	POP	P,JOUNAM+D$DEV
	MOVE	A,[POINT 7,[ASCIZ /JOU/]]
	MOVEM	A,JOUNAM+D$EXTN

SYG.8:				;Default the output file

	SKIPE	OUTNAM+D$NAME		;Was there an output file?
	 JRST	SYG.9			; No
	TXNE	C,OP%NOU		;Should there be one?
	 JRST	SYG.9			; No
	MOVE	A,INPNAM+D$DEV
	MOVEM	A,OUTNAM+D$DEV
	MOVE	A,INPNAM+D$DIR
	MOVEM	A,OUTNAM+D$DIR
	MOVE	A,INPNAM+D$NAME		;Copy the defaults
	MOVEM	A,OUTNAM+D$NAME
	MOVE	A,INPNAM+D$EXTN
	MOVEM	A,OUTNAM+D$EXTN

SYG.9:				;Default for command set later in EDT

	SKIPN	TRACEX			;Did he say /TRACE?
	 RET				; No
	PUSH	P,[1]
	PUSH	P,[0]
	PUSH	P,[0]
	PUSH	P,[0]
	CALL	$TRACE			;Yes - switch tracer on now
	SKIPN	TRCSTK			;Should we open a trace file?
	 JRST	SYG.9A			; No
	MOVEI	A,5
	MOVEM	A,-3(P)			;Yes - change the function code
	CALL	$TRACE

SYG.9A:

	ADJSP	P,-4
	RET

SYG.10:				;Here on /TRACE

	TXNN	A,CM%SWT		;Any value with the switch?
	 JRST	SYG.4			; No - ignore it
	COMND$	FLD			;Parse the routine name
	TXNE	A,CM%NOP
	 JRST	INVCMD
	SETOM	TRACEX			;Set the flag for later
	MOVEI	A,1(P)
	HRLI	A,(POINT 7,0)
	PUSH	P,ATOM			;Copy the routine name to the stack
	PUSH	P,ATOM+1	
	PUSH	P,[1]
	PUSH	P,A			;Point to the name
	PUSH	P,[0]
	PUSH	P,[0]
	COMND$	COL			;Look for a colon
	TXNE	A,CM%NOP
	 JRST	SYG.11
	SETOM	TRCSTK			;File will now be opened
	COMND$	NUX			;How many stack items
	TXNE	A,CM%NOP
	 SETZ	B,			;Assume none
	MOVEM	B,-1(P)			;Store this number
	COMND$	COL			;Colon again
	TXNE	A,CM%NOP
	 JRST	SYG.11
	COMND$	FLD			;Name of location to watch
	MOVE	B,[POINT 7,ATOM]	;Name is in ATOM buffer
	TXNN	A,CM%NOP
	 MOVEM	B,(P)			;Store it if OK

SYG.11:

	CALL	$TRACE			;Enable tracing on the routine
	ADJSP	P,-6
	POP	P,A			;Restore flags
	JRST	SYG.4
INVCMD:				;Invalid command
	MOVEI	A,.PRIOU
	HRLI	B,.FHSLF
	SETZ	C,
	ERSTR
	 JFCL
	 JFCL
	CALL	CMDINI			;Reinit the routine
	JRST	SYG.1

INVSWT:				;Invalid switch
	HRROI	A,[ASCIZ /Value not allowed on switch/]
	ESOUT
	CALL	CMDINI			;Reinit the routine
	JRST	SYG.1

ERROR:				;Fatal error
	MOVEI	A,.PRIOU
	HRLOI	B,.FHSLF
	SETZ	C,
	ERSTR
	 JFCL
	 JFCL
	MOVEI	A,1			;Send status back up
	HALTF

CMDINI:				;Init this routine
	MOVE	A,CMDOPT		;Copy the implied flags
	MOVEM	A,OPTION
	SETZM	INPNAM			;And clear the names
	SETZM	OUTNAM
	SETZM	JOUNAM
	SETZM	CMDNAM
	SETZM	GTJBLK+.GJNAM		;Make sure any defaults are cleared
	SETZM	GTJBLK+.GJEXT
	RET

REPARS:				;Reset for a reparse
	CALL	CMDINI			;Reinit the flags etc
	JRST	SYG.2
;
;SWITCH SUBROUTINES
;
;Enter with:
;	A = Flags in right half
;
;Exit with:
;	F =Flags for options word

CSWT0:				;/COMMAND or /NOCOMMAND
	TRNE	A,SW%NOT
	 JRST	[MOVEI	F,OP%NCM	;/NOCOMMAND
		 RET]
	PUSH	P,B
	MOVEI	A,CMDNAM
	PUSH	P,A
	CALL	GETFSP
	ADJSP	P,-2
	MOVEI	F,OP%COM
	RET

CSWT1:				;/JOURNAL or /NOJOURNAL
	TRNE	A,SW%NOT
	 JRST	[MOVEI	F,OP%NJO	;/NOJOURNAL
		 RET]
	PUSH	P,B
	MOVEI	A,JOUNAM
	PUSH	P,A
	CALL	GETFSP
	ADJSP	P,-2
	SETZ	F,
	RET

CSWT2:				;/OUTPUT or /NOOUTPUT
	TRNE	A,SW%NOT
	 JRST	[MOVEI	F,OP%NOU	;/NOOUTPUT
		 RET]
	PUSH	P,B
	MOVEI	A,OUTNAM
	PUSH	P,A
	CALL	GETFSP
	ADJSP	P,-2
	SETZ	F,
	RET

CSWT3:				;/READONLY or /NOREADONLY
	TRNN	A,SW%NOT
	 MOVEI	F,OP%NJO+OP%NOU		;/NOOUTPUT /NOJOURNAL
	RET

CSWT4:				;/RECOVER or /NORECOVER
	TRNN	A,SW%NOT
	 MOVEI	F,OP%REC		;/RECOVER
	RET

CSWT5:				;/CREATE or /NOCREATE
	TRNE	A,SW%NOT
	 MOVEI	F,OP%NCR		;/NOCREATE
	RET
;
;THESE ROUTINES SET THE DEFAULT FILE NAMES AND TYPES
;FOR THE SWITCHES /COMMAND, /JOURNAL, AND /OUTPUT.
;

SWDF0:				;/COMMAND = EDTINI.EDT
	MOVX	A,GJ%OLD!GJ%XTN
	MOVEM	A,GTJBLK+.GJGEN
	MOVE	A,[POINT 7,[ASCIZ /EDTINI/]]
	MOVEM	A,GTJBLK+.GJNAM
	MOVE	A,[POINT 7,[ASCIZ /EDT/]]
	MOVEM	A,GTJBLK+.GJEXT
	RET


SWDF1:				;/JOURNAL = input-file.JOU
	MOVX	A,GJ%FOU!GJ%MSG!GJ%XTN
	MOVEM	A,GTJBLK+.GJGEN
	MOVE	A,INPNAM+D$DEV
	MOVEM	A,GTJBLK+.GJDEV
	MOVE	A,INPNAM+D$DIR
	MOVEM	A,GTJBLK+.GJDIR
	MOVE	A,INPNAM+D$NAME
	MOVEM	A,GTJBLK+.GJNAM
	MOVE	A,[POINT 7,[ASCIZ /JOU/]]
	MOVEM	A,GTJBLK+.GJEXT
	RET


SWDF2:				;/OUTPUT = input-file.input-type
	MOVX	A,GJ%FOU!GJ%MSG!GJ%XTN
	MOVEM	A,GTJBLK+.GJGEN
	MOVE	A,INPNAM+D$DEV
	MOVEM	A,GTJBLK+.GJDEV
	MOVE	A,INPNAM+D$DIR
	MOVEM	A,GTJBLK+.GJDIR
	MOVE	A,INPNAM+D$NAME
	MOVEM	A,GTJBLK+.GJNAM
	MOVE	A,INPNAM+D$EXTN
	MOVEM	A,GTJBLK+.GJEXT
	RET


	END