COMMENT ⊗Filnam ⊗

DSCR FILNAM
CAL PUSHJ
PAR file name string on SP stack
 of form FILENAME<.EXT><[PROJ,PROG]>
RES FNAME(USER) : SIXBIT /filename/
 EXT(USER): SIXBIT /extension,,0/
 0
 PRPN(USER): SIXBIT /PRJ PRG/ (or zero)
SID uses D,X,Y (4-6), REMOVES STRING FROM STACK
⊗

↑↑FILNAM:
	SUB	SP,X22		;ADJUST STACK
	FOR II←1,3 <
	SETZM	FNAME+II(USER)>
	MOVEI	X,FNAME(USER)	;WHERE TO PUT IT
	PUSHJ	P,FLSCAN	;GET FILE NAME
	JUMPE	Y,FLDUN	;FILE NAME ONLY
	CAIE	Y,"."		;EXTENSION?
	JRST	FLEXT		;NO, CHECK PPN
	MOVEI	X,FNAME+1(USER)
	PUSHJ	P,FLSCAN
FLEXT:	JUMPE	Y,FLDUN	;NO PPN SPECIFIED
	CAIE	Y,"["
	JRST	FLERR		;INVALID CHARACTER
CMU <		;HANDLE PPNS VIA UUO, MAYBE
	HRRZS	1(SP)	;LENGTH PART
		;SNEAK A LOOK AT FIRST CHAR
	SKIPN	1(SP)	;IS THERE A FIRST CHAR?
	JRST	FLERR	; NO.
	MOVE	X,2(SP)
	ILDB	X,X
;;=C4= 1 of several LDE 28-Jun-74	allow null ppn within [].
	CAIN	X,"]"		;is it null?
	JRST	OCTPPN		; yes -- let the other guy handle it.
;;
	CAIL	X,"0"
	CAILE	X,"7"
	SKIPA		; NOT OCTAL DIGIT
	JRST	OCTPPN
	PUSH	P,A	;NEED MORE ROOM
	PUSH	P,B
	SETZM	A	;CLEAR THE AREA
	SETZM	B
	SETZM	C
	MOVEI	D,=13+1	;MAX #CHARS+1
	MOVE	X,[POINT 7,A]	;DUMP THEM THERE
FLN2:	SOSGE	1(SP)
	JRST	FLERRC	;RAN OUT OF STRING
	ILDB	Y,2(SP)	;THE NEXT CHAR
;;=C4= 2 OF SEVERAL
	JUMPE	Y,FLN2	;IGNORE NULLS
;;
	CAIN	Y,"]"	;THE END?
	JRST	GOTRB	; YES
	JUMPLE	D,FLERRC	;WE DON'T WANT ANY MORE CHARACTERS
	IDPB	Y,X	;STICK THE CHAR THERE
	SOJA	D,FLN2	;GET ANOTHER

GOTRB:	MOVEI	X,A	;THATS WHERE THE UUO WILL FIND THEM
	CALLI	X,-2		;CMUDEC UUO
	JRST	FLERRC	;SOMETHING WRONG
	MOVEM	X,FNAME+3(USER)	;SAVE IT

	AOS	-2(P)		;INDICATE SUCCESS
FLERRC:	POP	P,B
	POP	P,A
	POPJ	P,
OCTPPN:
>;CMU
	PUSHJ	P,[

	RJUST:	SETZM	PROJ(USER)
		MOVEI	X,PROJ(USER)
		PUSHJ	P,FLSCAN	;GET PROJ OR PROG IN SIXBIT
IFN SIXSW,<
		MOVE	X,PROJ(USER)
		IMULI	D,-6		;SHIFT FACTOR
		LSH	X,(D)		;RIGHT-JUSTIFY THE PROJ OR PROG
>;IF SIXSW (SET IN HEAD, USUALLY CONDITIONED ON NOEXPO)
	
IFE SIXSW,<
		MOVEI	X,0
;;#GT# DCS 5-11-72 ALLOW LARGE OCTAL NUMBERS AT STD DEC SYSTEMS
;;=C4= 3 OF several LE03 28-JUN-74	ALLOW NULL PPN
;		MOVE	D,PROJ(USER)	;WAS A HLLZ
		SKIPN	D,PROJ(USER)
		POPJ	P,
;;
;;
	FBACK:	MOVEI	C,0
		LSHC	C,6		;GET A SIXBIT CHAR
		CAIL	C,'0'
		CAILE	C,'7'
		JRST	FLERR		;INVALID OCTAL
		LSH	X,3
		IORI	X,-'0'(C)
		JUMPN	D,FBACK
>;NOT SIXSW (USUALLY CONDITIONED ON EXPO)
	FPOP:	POPJ	P,]

	HRLZM	X,FNAME+3(USER)
	CAIE	Y,","
;;=C4 4 OF several
;	JRST	FLERR		;INVALID CHAR
	JRST	[JUMPE	X,FLDUN1	;ALLOW NULL PPN - CHECK FOR "]"
		 JRST	FLERR]		;A REAL ERROR.
;;
	PUSHJ	P,RJUST		;JUSTIFY(AND CONVERT IF EXPORT) PROG #
	HRRM	X,FNAME+3(USER)
;;=C4= 5 OF several.
FLDUN1:
;;
	CAIN	Y,"]"
FLDUN:	AOS	(P)		;SUCCESSFUL
FLERR:	POPJ	P,		;DONE, NOT NECESSARILY RIGHT

ENDCOM(FIL)
COMPIL(FLS,<FLSCAN>,,<FLSCAN ROUTINE>)
COMMENT ⊗Flscan ⊗

DSCR FLSCAN
CAL PUSHJ
PAR X -- addr of destination SIXBIT
 1(SP), 2(SP) -- input string
RES sixbit for next filename, etc in word addressed by X
 break (punctuation) char in Y (0 if string exhausted)
 D,X, input string adjusted
SID only those AC changes listed above (Y, for instance)
⊗

↑↑FLSCAN:  
	HRRZS	1(SP)		;WANT ONLY LENGTH PART
	MOVEI	D,6		;MAX NUMBER PICKED UP
	SETZM	(X)		;ZERO DESTINATION
	HRLI	X,440600	;BYTE POINTER NOW
FLN1:	MOVEI	Y,0		;ASSUME NO STRING LEFT
	SOSGE	1(SP)		;TEST 0-LENGTH STRING
	 POPJ	 P,
	ILDB	Y,2(SP)		;GET BYTE
	CAIE	Y,"."		;CHECK VALID BREAK CHAR
	CAIN	Y,"["
	POPJ	P,
	CAIE	Y,"]"
	CAIN	Y,","
	POPJ	P,
	JUMPE	D,FLN1		;NEED NO MORE CHARS
;;=C4=	6 of several.	IGNORE NULL CHARACTERS.
	JUMPE	Y,FLN2X
;;
	TRZN	Y,100		;MOVE 100 BIT TO 40 BIT
	TRZA	Y,40		; TO CONVERT TO SIXBIT
	TRO	Y,40		; (NO CHECKING)
	IDPB	Y,X		;PUT IT AWAY
;;=C4= 7 of several
FLN2X:
;;
	SOJA	D,FLN1		;CONTINUE

ENDCOM(FLS)
COMPIL(OPN,<OPEN,RELEASE,SETPL,CHNCDB>
	  ,<GETCHN,SAVE,RESTR,CORGET,FLSCAN,SIMIO,X33,X22,X11,CORREL>
	  ,<OPEN RELEASE AND SETPL FUNCTIONS>)


COMMENT ⊗
ERMAN'S IMPROVED BUFFER GETTER   ---  DEC. 1970
 If a buffer size is specified (lh #buf word), allocate that size, else the
standard size (determined via a dummy XXXBUF, clever soul that LDE is).
"NOTICE WITH AWE THAT NO CORE IS EVER WASTED, AS IN THE INFERIOR OLD WAY" (sic).
⊗
	MOVEI	Z,0		;FOR DUMMY (AND REAL) OUTBUF
	PUSHJ	P,GETBFS	;GET CORE, DO THE OUTBUFS (OR SIMULATIONS)
	ADDI	CDB,OBUF-OBPNT+1 ;RELOCATE FOR INPUT IN CDB
	MOVEI	Z,-1
	PUSHJ	P,GETBFS	;GET CORE, DO INBUFS
	SUBI	CDB,OBUF-OBPNT+1;RE-RELOCATE
CMU <	;FUNNY INPUT DEVICE
	SKIPL	DMODE(CDB)		;DID HE SPECIFY TO GET ERRS FROM
					; BUFFER HEADER?
	JRST	STNIT			;     NO.
	HRLZI	TEMP,400000
	SKIPE	IBUF(CDB)		;INPUT BUFFERS?
	JRST	[IORM	TEMP,IBUF(CDB)	; YES
		 JRST	STNIT]
	SKIPE	OBUF(CDB)		;OR OUTPUT BUFFERS?
	JUMPA	CHNL,[IORM	TEMP,OBUF(CDB)	; YES
			JRST	STNIT]
	ERR<OPEN: SPEECH DEV BUT NO BUFFERS, CHAN >,7
>;CMU

; FINISH OUT -- SET EOF FLAG IF DESIRED

STNIT:	;SETOM	JOBFF		;ONE MUST KNOW WHAT HE IS DOING TO USE
	MOVEM	CDB,@CDBLOC(USER) ;STORE CDB ADDR IN CHANS TABLE
	SETZM	@ENDFL(CDB)	;MARK OPEN SUCCESSFUL
	JRST	RESTR		;RESTORE ACS, RETURN

BADOPN:	HRRZ	TEMP,JOBREN	;NEXT START WILL ASK ALLOC
	HRRM	TEMP,JOBSA	;QUESTION
	ERR	<TOO MANY CHANNELS OR I/O BUFFERS REQUESTED>,1,<(TEMP)>

RTRY:	TERPRI	<OPEN: DEVICE NOT AVAILABLE>
	TERPRI	<TYPE "R" TO RETRY, "X" TO GO ON WITHOUT>
	PRINT	<?>
	PUUO	TEMP
;;=C6= LDE 28-Jun-74
	CAIE	TEMP,"r"
;;
	CAIN	TEMP,"R"	;TRY AGAIN?
	 JRST	 AGNN		;YES
;;%##%
	SETOM	@ENDFL(CDB)	;MARK A LOSER
	JRST	 NORELO
;;%##%

GETBFS:	SETZM	ONAME(CDB)	;CLEAR FILE NAME
	HRRZ	Y,OBUF(CDB)	;NUMBER OF BUFFERS
	HLRZ	D,OBUF(CDB)	;SIZE
EXPO <
	HRRZS	OBUF(CDB)	;MARK FOR SPECIAL TEST
>;EXPO
	JUMPE	Y,GBUFRT	;NO BUFFERS
	JUMPE	D,GETDES	;WANTS DEFAULT SIZE
	ANDI	D,7777		;MAX BUFFER SIZE
	HRLZ	A,D		;SIZE IN LH
	PUSHJ	P,GETCOR	;GET THE CORE (SURPRISE!)
	SETZM	OCOWNT(CDB)	;IN CASE NO ACTUAL INBUF (OUTBUF) DONE
	CAIL	E,15		;DUMP MODE?
	 JRST	 GBUFRT		; YES, DON'T ACTUALLY FUDGE UP BUFFERS
NOEXPO <;USE UINBF, UOUTBF
;;#GD# 01-25-72 DCS (1-2) set up JOBFF, Fix XCT, bad count
	MOVEM	B,JOBFF		;B FROM CORGET HAS BUFFER AREA ADDRESS
	SUBI	D,2		;GETCOR INCREMENTED
;;#GD#
	HRRZ	C,Y
	MOVE	A,[UINBF C]
	JUMPN	Z,.+2
	MOVE	A,[UOUTBF C]
	DPB	CHNL,[POINT 4,A,12]
;;#GD# 01-25-72 DCS (2-2) (was XCT CHNL, clearly wrong)
	XCT	A		;DO THE ALLOCATIONS
;;#GD#
	POPJ	P,
>;NOEXPO
EXPO <
	ADDI	B,1		;SECOND WORD
BUFC1:	HRR	A,B
	SOJLE	Y,BUFC2
	ADD	B,D		;NEXT ONE
	MOVEM	A,(B)		;MAKE POINT TO PREV
	JRST	BUFC1

BUFC2:	MOVE	B,OBUF(CDB)	;BACK TO FIRST
	MOVEM	A,1(B)		;LINK IT TOO
	HRLI	A,400000	;RING-USE BIQ
	MOVEM	A,OBPNT(CDB)	;BUFFER PTR
	POPJ	P,
>;EXPO

GETCOR:	ADDI	D,2		;+2 FOR ACCOUNTING
	MOVE	C,D
	IMUL	C,Y		;TOTAL CORE NEEDED
	PUSHJ	P,CORGET	;GRAB IT
	ERR	<OPEN: NOT ENUFF CORE FOR BUFFERS>
	HRRZM	B,OBUF(CDB)	;SAVE SO CAN RELEASE
	POPJ	P,

GETDES:	MOVEI	A,1		;1 DUMMY BUFFER
	CAIL	E,15		;GOOD OLD DUMP MODE?
	 JRST	 [MOVEI D,202	;ASSUME THIS, SINCE INBUF/OUTBUF WON'T
		  JRST GDIT]	; WORK IN DUMP MODE
	MOVEI	TEMP,BRKDUM-1(USER)
	MOVEM	TEMP,JOBFF
	PUSHJ	P,GETIOB	;DUMMY IN/OUBUF
	LDB	D,[POINT 17,BRKDUM(USER),17] ;GET THE SIZE
GDIT:	PUSHJ	P,GETCOR	;GET THE CORE
	SETZM	OCOWNT(CDB)	;CLEAR BYTE COUNT
	CAIL	E,15		;DUMP MODE?
	JRST	GBUFRT		;YES, NO BUFFER STRUCTURE
	MOVEM	B,JOBFF
	MOVE	A,Y		;NUMBER OF BUFFERS
	PUSHJ	P,GETIOB	;NOW FOR REAL
GBUFRT:	SETOM	JOBFF		;FOR SPITE
	POPJ	P,

GETIOB:	SKIPN	Z
	XCT	IOOUTBUF,SIMIO	;DO OUTBUF
	SKIPE	Z
	XCT	IOINBUF,SIMIO	;INBUF
	POPJ	P,
SUBTTL	RELEASE