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DSKCOM.ASM
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DSKCOM.ASM
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; [ This translation created 10-Feb-83 by Version 4.3 ]
.RADIX 8 ; To be safe
CSEG SEGMENT PUBLIC 'CODESG'
ASSUME CS:CSEG
INCLUDE OEM.H
TITLE DSKCOM - - COMMON ROUTINES FOR DISK BASICS
ALPCPM=0
MELCO=0
MODEL3=0
DSEG SEGMENT PUBLIC 'DATASG' ; Data Segment
ASSUME DS:DSEG
EXTRN CURLIN:WORD,DSCTMP:WORD,PTRFIL:WORD,FRETOP:WORD
EXTRN SAVSTK:WORD,TXTTAB:WORD,VALTYP:WORD,VARTAB:WORD
EXTRN BUF:WORD
EXTRN DIRTMP:WORD
DSEG ENDS ;End of data segment externals
; Code Segment ( terminated by END at bottom of file )
EXTRN CLSFIL:NEAR,CONINT:NEAR,DERBFN:NEAR,DERRPE:NEAR,ERROR:NEAR
EXTRN FILOU3:NEAR,CHRGTR:NEAR
EXTRN INDSKC:NEAR,PRGFIL:NEAR,SCRTCH:NEAR,SNERR:NEAR
EXTRN STRLT3:NEAR,DERFOV:NEAR,DERBFM:NEAR,DOCNVF:NEAR,FCERR:NEAR
EXTRN FINBCK:NEAR,FINPRT:NEAR,FRCSTR:NEAR,FRESTR:NEAR
EXTRN FRMEVL:NEAR,GETBYT:NEAR,GETSPA:NEAR,GTBYTC:NEAR,GTMPRT:NEAR
EXTRN INCHRI:NEAR
EXTRN LINKER:NEAR,LIST:NEAR,MAIN:NEAR,NEWSTT:NEAR,OMERR:NEAR
EXTRN PTRGET:NEAR,PUTNEW:NEAR,READY:NEAR,RUNC:NEAR
EXTRN VMOVFM:NEAR,VMOVMF:NEAR,STRINI:NEAR
EXTRN FRMEQL:NEAR
EXTRN ENDCON:NEAR,GONE:NEAR
EXTRN DOASIG:NEAR,ERRFDR:NEAR,FIN:NEAR
EXTRN SCCPTR:NEAR
EXTRN GETYPR:NEAR,SYNCHR:NEAR,DCOMPR:NEAR
PUBLIC FIELD,PRGFLI
PUBLIC FILIND
PUBLIC MKI$,MKS$,MKD$,CVI,CVS,CVD
PUBLIC DLINE,PRGFL2,LRUN,LOAD,PRGFIN,MERGE,SAVE
PUBLIC OKGETM
PUBLIC RSET,LSET
DSEG SEGMENT PUBLIC 'DATASG'
EXTRN PROFLG:WORD
DSEG ENDS
INCLUDE GIO86U
CPM86=0
INCLUDE MSDOSU
NMLOFS=F_BREM
.RADIX 10
COMMENT % REVISION HISTORY
4/23/78 PGA ALLOW # ON CLOSE
8/6/79 PGA IF ^C ON MBASIC FOO, DONT RETURN TO SYSTEM. SEE 'NOTINI'
6/27/80 PGA FIX INPUT#1,D# SO IT USES FINDBL INSTEAD OF FIN
AND THUS AVOIDS LOSING SIGNIFICANCE.
%
SUBTTL FILINP AND FILGET -- SCAN A FILE NUMBER AND SETUP PTRFIL
EXTRN FILINP:NEAR,FILSCN:NEAR,FILSET:NEAR
SUBTTL FILSCN, FILFRM, AND FILIDX
SUBTTL Conversion Routines
MKI$: MOV AL,LOW 2 ;VALUE TYPE FOR INTEGER AND NUMBER
;OF CHARACTERS RESULT WILL NEED
DB 271O ; SKIP ;SKIP NEXT TWO BYTES WITH "LXI B,"
MKS$: MOV AL,LOW 4 ;VALUE TYPE OF SINGLE PRECISION
DB 271O ; SKIP ;SKIP NEXT TWO BYTES
MKD$: MOV AL,LOW 8 ;VALUE TYPE OF DOUBLE-PRECISION
PUSH AX ;SAVE THE NUMBER OF BYTES OF
;STRING SPACE WE NEED
CALL DOCNVF ;CONVERT FAC TO PROPER TYPE
POP AX ;GET THE NUMBER OF BYTES NEEDED
CALL STRINI ;GET A PLACE FOR THE STRING DATA
DSEG SEGMENT PUBLIC 'DATASG'
EXTRN DSCPTR:WORD
DSEG ENDS
MOV BX,DSCPTR ;POINT TO THE PLACE TO STORE THE DATA
CALL VMOVMF ;MOVE THE FAC VALUE INTO THE STRING CREATION
JMP FINBCK
CVI: MOV AL,LOW 1 ;SET [A] TO BE VALTYP-1
DB 271O ; SKIP ;SKIP THE NEXT TWO BYTES WITH "LXI B,"
CVS: MOV AL,LOW 3 ;ALSO SET [A] TO NUMBER OF CHARACTERS REQUIRED -1
DB 271O ; SKIP ;SKIP THE NEXT TWO BYTES
CVD: MOV AL,LOW 7 ;DOUBLE PRECISION VALUE TYPE -1
PUSH AX ;SAVE THE VALTYP
CALL FRESTR ;MAKE SURE THE ARGUMENT IS A STRING
;AND GET A POINTER TO THE DESCRIPTOR
POP AX ;GET BACK NUMBER OF CHARACTERS REQUIRED-1
CMP AL,BYTE PTR [BX] ;MAKE SURE THE STRING IS LONGER THAN THAT
JNAE SHORT ??L000
JMP FCERR ;IF NOT, "ILLEGAL FUNCTION CALL"
??L000:
INC AL ;[A]=TRUE VALUE TYPE
MOV BYTE PTR VALTYP,AL ;SETUP VALUE TYPE FOR MOVE
INC BX
MOV BX,[BX] ;[H,L]=POINTER AT STRING DATA
;AND FOR IDENTIFICATION
JMP VMOVFM
SUBTTL Read Items From A Sequential File
FILIND:
CALL GETYPR ;SEE IF INPUT IS STRING OR NUMBER
MOV CX,OFFSET DOASIG ;RETURN ADDRESS TO SETUP [FAC]
CON1=0 (44*256) 32
MOV DX,OFFSET CON1 ;SETUP TERMINATORS SPACE AND COMMA
JNZ SHORT INPDOR ;IF NUMERIC, GO READ THE FILE
MOV DL,DH ;MAKE BOTH TERMINATORS COMMA
JMP SHORT INPDOR ;GO READ THE FILE
;
; Entry for line input and read code for item fetching from
; sequential input files
;
DLINE:
CALL FILINP ;GET FILE NUMBER SET UP
CALL PTRGET ;READ STRING TO STORE INTO
CALL FRCSTR ;MAKE SURE IT WAS A STRING
MOV CX,OFFSET FINPRT ;RESET TO CONSOLE WHEN DONE READING
PUSH CX ;SAVE ON STACK
PUSH DX ;SAVE POINTER AT VARIABLE
EXTRN LETCON:NEAR
MOV CX,OFFSET LETCON ;GOOD RETURN ADDRESS FOR ASSIGNMENT
XOR AL,AL ;SET A=0 FOR STRING VALUE TYPE
MOV DH,AL ;ZERO OUT BOTH TERMINATORS
MOV DL,AL
INPDOR: PUSH AX ;SAVE VALUE TYPE
PUSH CX ;SAVE RETURN ADDRESS
PUSH BX ;SAVE POINTER AT DATA COMING IN
;A DUMMY POINTER AT BUFMIN
NOTNWT:
EXTRN INCHR:NEAR
CALL INCHR ;Read a character from file PTRFIL
CMP AL,LOW " " ;SKIP LEADING SPACES
JNZ SHORT NOTSPC ;EXCEPT FOR LINE INPUT
INC DH ;CHECK FOR LINEINPUT
DEC DH
JNZ SHORT NOTNWT ;SKIP ANY NUMBER
NOTSPC: CMP AL,LOW 34 ;QUOTED STRING COMING IN?
JNZ SHORT NOTQTE
MOV AL,DL ;MUST BE INPUT OF A STRING
CMP AL,LOW 44D ;WHICH HAS [E]=44 (",")
MOV AL,LOW 42O ;QUOTE BACK INTO [A]
JNZ SHORT NOTQTE
MOV DH,AL ;TERMINATORS ARE QUOTES ONLY
MOV DL,AL
CALL INDSKC ;READ PAST QUOTATION
JB SHORT QUITSI ;IF EOF, ALL DONE
NOTQTE:
MOV BX,OFFSET BUF ;BUFFER FOR DATA
MOV CH,LOW 255 ;MAXIMUM NUMBER OF CHARACTERS (255)
LOPCRS: MOV CL,AL ;SAVE CHARACTER IN [C]
MOV AL,DH ;CHECK FOR QUOTED STRING
CMP AL,LOW 42O
MOV AL,CL ;RESTORE CHARACTER
JZ SHORT NOTQTL ;DON'T IGNORE CR OR STOP ON LF
CMP AL,LOW 13 ;CR?
PUSH BX ;SAVE DEST PTR. ON STACK
JZ SHORT ICASLF ;EAT LINE FEED IF ONE
POP BX ;RESTORE DEST. PTR.
CMP AL,LOW 10 ;LF?
JNZ SHORT NOTQTL ;NO, TEST OTHER TERMINATORS
LPISLF: ;** 5/14/82 BUG FIX(MULTIPLE LF FOR UNQUOTED STRING)
MOV CL,AL ;SAVE CURRENT CHAR
MOV AL,DL ;GET TERMINATOR 2
CMP AL,LOW 54O ;CHECK FOR COMMA (UNQUOTED STRING)
MOV AL,CL ;RESTORE CHARACTER
JZ SHORT ??L001
CALL STRCHR ;IF NOT, STORE LF (?)
??L001:
CALL INDSKC ;GET NEXT CHAR
JB SHORT QUITSI ;IF EOF, ALL DONE.
CMP AL,LOW 10 ;** 5/14/82 BUG FIX(MULTIPLE LF FOR UNQUOTED STRING)
JZ SHORT LPISLF ;** 5/14/82 BUG FIX(MULTIPLE LF FOR UNQUOTED STRING)
CMP AL,LOW 13 ;IS IT A CR?
JNZ SHORT NOTQTL ;IF NOT SEE IF STORE NORMALLY
MOV AL,DL ;GET TERMINATOR
CMP AL,LOW " " ;IS IT NUMERIC INPUT?
JZ SHORT LPCRGT ;IF SO, IGNORE CR, DONT PUT IN BUFFER
CMP AL,LOW 44 ;IS IT NON-QUOTED STRING (TERM=,)
MOV AL,LOW 13 ;GET BACK CR.
JZ SHORT LPCRGT ;IF SO, IGNORE CR.
NOTQTL: OR AL,AL ;IS CHAR ZERO
JZ SHORT LPCRGT ;ALWAYS IGNORE, AS IT IS TERMINATOR
;FOR STRLIT (SEE QUIT2B)
CMP AL,DH ;TERMINATOR ONE?
JZ SHORT QUITSI ;STOP THEN
CMP AL,DL ;TERMINATOR TWO?
JZ SHORT QUITSI
CALL STRCHR ;SAVE THE CHAR
LPCRGT: CALL INDSKC ;READ ANOTHER CHARACTER
JAE SHORT LOPCRS ;IF NOT, CHECK AS TERMINATOR
QUITSI: PUSH BX ;SAVE PLACE TO STUFF ZERO
CMP AL,LOW 34 ;STOPPED ON QUOTE?
JZ SHORT MORSPC ;DON'T SKIP SPACES THEN
;BUT DO SKIP FOLLOWING COMMA OR
;CRLF THOUGH
CMP AL,LOW " " ;STOPPED ON SPACE?
JNZ SHORT NOSKCR ;NO, DON'T SKIP SPACES
;OR ANY FOLLOWING COMMAS OR CRLFS EITHER
MORSPC: CALL INDSKC ;READ SPACES
JB SHORT NOSKCR ;EOF, ALL DONE.
CMP AL,LOW " "
JZ SHORT MORSPC
CMP AL,LOW 44 ;COMMA?
JNZ SHORT ??L002
JMP NOSKCR ;OK, SKIP IT
??L002:
CMP AL,LOW 13 ;CARRIAGE RETURN?
JNZ SHORT BAKUPT ;BACK UP PAST THIS CHARACTER
ICASLF:
CALL INDSKC ;READ ANOTHER
JB SHORT NOSKCR ;EOF, ALL DONE.
CMP AL,LOW 10 ;LINE FEED?
JZ SHORT NOSKCR ;OK, SKIP IT TOO
BAKUPT:
EXTRN BAKCHR:NEAR
CALL BAKCHR ;backup file PTRFIL
NOSKCR: POP BX ;GET BACK PLACE TO STORE TERMINATOR
QUIT2B: MOV BYTE PTR [BX],LOW 0 ;STORE THE TERMINATOR
MOV BX,OFFSET BUF-1 ;ITEM IS NOW STORED AT THIS POINT 1
MOV AL,DL ;WAS IT A NUMERIC INPUT?
SUB AL,LOW " " ;IF SO, [E]=" "
JZ SHORT NUMIMK ;USE FIN TO SCAN IT
EXTRN STRLT2:NEAR
MOV CH,DH ;SET [B]=44 IF SCANNING UNQUOTED STRING
MOV DH,LOW 0
CALL STRLT2
POP BX ;GET BACK [H,L]
RET ;DO ASSIGNMENT
NUMIMK:
CALL GETYPR ;GET TYPE OF NUMERIC VARIABLE BEING READ
LAHF ; PUSH PSW
XCHG AL,AH
PUSH AX
XCHG AL,AH ;SAVE IT
CALL CHRGTR ;READ FIRST CHARACTER
POP AX ; POP PSW
XCHG AL,AH
SAHF ;RESTORE TYPE OF VARIABLE
LAHF ; PUSH PSW
XCHG AL,AH
PUSH AX
XCHG AL,AH ;SAVE BACK
JNB SHORT ??L003
CALL FIN ;SINGLE PRECISION INPUT
??L003:
POP AX ; POP PSW
XCHG AL,AH
SAHF ;GET BACK TYPE OF VAR
EXTRN FINDBL:NEAR
JNAE SHORT ??L004
CALL FINDBL
??L004: ;DOUBLE PRECISION INPUT
POP BX ;GET [H,L]
RET ;DO THE ASSIGNMENT
STRCHR: OR AL,AL ;TRYING TO STORE NULL BYTE
JNZ SHORT $ 3
RET ;RETURN, DONT STORE IT
MOV BYTE PTR [BX],AL ;STORE THE CHARACTER
INC BX
DEC CH ;128 YET?
JZ SHORT $ 3
RET ;MORE SPACE IN BUFFER, RETURN
POP CX ;GET RID OF SUPERFLUOUS STACK ENTRY
JMP SHORT QUIT2B ;SPECIAL QUIT
SUBTTL LOAD and RUN routines
PRGFLI: MOV DH,LOW OFFSET MD_SQI ;SEQUENTIAL INPUT MODE
PRGFL2: XOR AL,AL ;INTERNAL FILE NUMBER IS ALWAYS ZERO
JMP PRGFIL ;SCAN FILE NAME AND DISK NUMMER
;AND DO THE RIGHT THING USING MD.KIL
;AS A FLAG
LRUN:
LRUN2: MOV AL,LOW 1
JMP LRUN3 ;1 INDICATES, CLOSE FILES, RUN
LOAD: XOR AL,AL ;FLAG ZERO FOR "LOAD"
LRUN3: ;A=1 INDICATES CLOSE FILES, RUN
;A=0 INDICATES CLOSE FILES, NO RUN
LAHF ; PUSH PSW
XCHG AL,AH
PUSH AX
XCHG AL,AH ;SAVE "RUN"/"LOAD" FLAG
CALL PRGFLI ;FIND THAT FILE AND SETUP FOR
;USING INDSKC SUBROUTINE
DEC BX ;SEE IF NO RUN OPTION
CALL CHRGTR
JZ SHORT NOTRNL ;NO, JUST LOAD
CALL SYNCHR
DB OFFSET 44 ;GOTTA HAVE A COMMA
CALL SYNCHR
DB OFFSET "R" ;ONLY OPTION IS RUN
JZ SHORT ??L005
JMP SNERR ;AND THAT BETTER BE THE END
??L005:
POP AX ; POP PSW
XCHG AL,AH
SAHF ;GET RID OF "RUN"/"LOAD" FLAG
; RUN fn closes all files, loads program, and executes program
; RUN fn,R loads program, and executes program
; LOAD fn closes all files, loads program
; LOAD fn,R loads program, and executes program
; MERGE fn merges an ASCII program
; CHAIN fn loads/merges a program, and executes program (leaving files opened)
;
PUBLIC CHNENT
DSEG SEGMENT PUBLIC 'DATASG'
EXTRN RUNFLG:WORD
DSEG ENDS
CHNENT:
MOV AL,LOW 201O ;A=LEAVE FILES OPEN, RUN
JMP SHORT NOTRN1
NOTRNL: POP AX ; POP PSW
XCHG AL,AH
SAHF ;restore [A]=1 for RUN, 0 for LOAD
NOTRN1:
;Variable ",R" CHAIN LOAD RUN
MOV BYTE PTR RUNFLG,AL ;RUNFLG= ^O201 ^O201 0 1
OR AL,LOW 1 ;
MOV BYTE PTR NLONLY,AL ;NLONLY= ^O201 ^O201 1 1
;If NLONLY and 200 <> 0, don't close any files
;If NLONLY and 001 <> 0, don't close file 0
CALL SCRTCH ;Clear variables, close files
; BELOW IS FIX (TO LABEL NOTINI) SO THAT IF ^C DURING MBASIC FOO, WONT EXIT TO SYSTEM
MOV BX,CURLIN ;GET LINE NUMBER
LAHF
INC BX ;SEE IF IN INITIALIZATION
SAHF
MOV AL,BH
AND AL,BL
INC AL
JNZ SHORT NOTINI ;NO
MOV CURLIN,BX ;SAVE DIRECT LINE NUMBER
NOTINI:
CALL INDSKC ;READ THE FIRST CHARACTER
JAE SHORT ??L006
JMP MAIN ;ALL DONE IF NOTHING IN FILE
??L006:
CMP AL,LOW 254 ;IS THIS A PROTECTED FILE?
JNZ SHORT NTPROL ;NO
MOV BYTE PTR PROFLG,AL ;SET PROTECTED FILE
JMP SHORT BINLOD ;DO BINARY LOAD
NTPROL:
INC AL ;IS IT A BINARY FILE?
JZ SHORT ??L007
JMP MAINGO ;NO, SINCE PTRFIL IS NON-ZERO
??L007:
;INCHR WILL USE INDSKC INSTEAD OF POLLING
;THE TERMINAL
;WHEN EOF IS HIT PTRFIL WILL BE RESTORED
;AND LSTFRE WILL BE USED AS A FLAG
;TO INDICATE WHETHER TO RUN THE
;LOADED PROGRAM
;
; TIME FOR A BINARY LOAD.
; AFTER THE LOAD, THE FILE IS LINKED TOGETHER
; LSTFRE IS USED AS A FLAG WHETHER TO RUN OR NOT
;
BINLOD: MOV BX,TXTTAB ;GET PLACE TO START STORING INTO
EXTRN FSTLOD:NEAR
CALL FSTLOD ;USE FAST LOAD CODE IN DCPM.MAC
EXTRN PROLOD:NEAR
MOV VARTAB,BX ;SAVE END TEMP FOR DECODING
MOV AL,BYTE PTR PROFLG ;IS THIS A PROTECTED FILE?
OR AL,AL ;SET CC'S
JZ SHORT ??L008
CALL PROLOD
??L008: ;TRANSLATE TO GOOD STUFF
CALL LINKER ;FIX THE LINKS
INC BX ;WHEN LINKER RETURNS, [H,L]
INC BX ;POINTS TO DOUBLE ZERO
MOV VARTAB,BX ;UPDATE [VARTAB]
CALL RUNC ;SETUP ARYTAB, STREND
DSEG SEGMENT PUBLIC 'DATASG'
EXTRN CHNFLG:WORD
DSEG ENDS
EXTRN CHNRET:NEAR
MOV AL,BYTE PTR CHNFLG ;CHAIN IN PROGRESS
OR AL,AL ;TEST
JZ SHORT ??L009
JMP CHNRET ;YES, GO BACK TO CHAIN CODE
??L009:
DSEG SEGMENT PUBLIC 'DATASG'
EXTRN NLONLY:WORD
DSEG ENDS
XOR AL,AL ;
MOV BYTE PTR NLONLY,AL ;allow all files to be closed
CALL FINPRT ;reset PTRFIL to 0 and close file 0
DSEG SEGMENT PUBLIC 'DATASG'
EXTRN RUNFLG:WORD
DSEG ENDS
MOV AL,BYTE PTR RUNFLG ;RUN OR NOT?
OR AL,AL
JNZ SHORT ??L010
JMP READY
??L010:
JMP NEWSTT
PRGFIN: CALL FINPRT ;ZERO PTRFIL
CALL CLSFIL ;CLOSE FILE ZERO
JMP GTMPRT ;REFETCH TEXT POINTER
PUBLIC OUTLOD
OUTLOD: CALL SCRTCH
JMP OMERR
;MERGE filespec Statement
; (OKGETM is called by CHAIN MERGE ... in FIVEO)
;
MERGE: POP CX ;ELIMINATE NEWSTT RETURN
CALL PRGFLI ;READ THE NAME AND DISK
DEC BX ;MUST END THERE
CALL CHRGTR
JZ SHORT OKGETM ;READ THE FILE
CALL PRGFIN ;CLOSE OUT TIME
JMP SNERR ;AND "SYNTAX ERROR"
OKGETM: XOR AL,AL ;NO RUN OPTION WITH "MERGE"
DSEG SEGMENT PUBLIC 'DATASG'
EXTRN RUNFLG:WORD
DSEG ENDS
MOV BYTE PTR RUNFLG,AL ;SET UP THE RUN FLAG
INC AL
MOV BYTE PTR NLONLY,AL ;NLONLY=1, don't close file 0
PUBLIC OKGET2
OKGET2:
CALL INDSKC ;READ FROM [PTRFIL] FILE
JAE SHORT ??L011
JMP MAIN ;GO BACK IF EOF
??L011:
INC AL ;IS IT A BINARY FILE??
JNZ SHORT ??L012
JMP DERBFM ;BINARY IS WRONG FILE MODE
??L012:
INC AL ;OR PROTECTED BINARY FILE??
JNZ SHORT ??L013
JMP DERBFM ;ALSO GIVE BAD FILE MODE
??L013:
DEC AL ;adjust [A] for 1st INR A above
;so we can put it back (backup input file)
MAINGO:
DEC AL ;[A]=character which was just read from file
CALL BAKCHR ;backup file PTRFIL
EXTRN SCDASC:NEAR
CALL SCDASC ;set File Code to ASCII overridding user setting)
JMP MAIN
SUBTTL DISPATCH FOR DIRECT STATEMENT
;
; MAKE SURE WE'RE NOT READING A FILE IN
;
SUBTTL SAVE COMMAND -- ASCII OR BINARY
SAVE:
PUSH BX ;save text pointer for rescan of filename
CALL FRMEVL ;skip filename
PUSH BX
CALL FRESTR ;release string temporary
POP BX
DEC BX
CALL CHRGTR
JNZ SHORT ??L014
JMP ENDOFS ;branch if end-of-statement
??L014:
CALL SYNCHR
DB OFFSET 54O ;eat comma
CMP AL,LOW "A"
JNZ SHORT ??L015
JMP GOODSV ;branch if got "A"
??L015:
CMP AL,LOW "P"
JZ SHORT ??L016
JMP SNERR ;branch if not "A" or "P"
??L016:
GOODSV: PUSH BX ;save text pointer
PUSH AX ;save "A" or "P"
CALL CHRGTR ;check for end-of-statement
JZ SHORT ??L017
JMP SNERR ;error if not end-of-statement
??L017:
POP AX
POP BX ;leave text pointer pointing at "A" or "P"
ENDOFS: POP SI ;XTHL
XCHG SI,BX
PUSH SI ;save End-Of-Statement text pointer
;HL = text pointer to filename
PUSH AX ;save "A", "P" or null option
MOV DH,LOW OFFSET MD_SQO ;ELIMINATE EARLIER VERSION OF FILE
;AND CREATE EMPTY FILE
CALL PRGFL2 ;parse file name and open it
POP AX ;[A]="A", "P" or null option
POP BX ;restore End-Of-Statement text pointer
EXTRN PROSAV:NEAR
CMP AL,LOW "P" ;PROTECTED SAVE?
JNZ SHORT ??L018
JMP PROSAV ;DO IT
??L018:
CMP AL,LOW "A" ;Ascii save?
JZ SHORT ??L019
JMP BINSAV ;if not, must be Binary Save
??L019:
CALL CHRGTR ;skip "A"
CALL SCDASC ;set File Code to ASCII (overridding user setting)
JMP LIST ;USE THE LIST CODE TO DO THE OUTPUT
;CONTROL-CS ARE NOT ALLOWED
;AND AT THE END PTRFIL IS ZEROED
EXTRN BINSAV:NEAR
SUBTTL DRIVER CODE FOR CLOSE
SUBTTL "FIELD" STATEMENT FOR SETTING UP I/O STRINGS
DSEG SEGMENT PUBLIC 'DATASG'
EXTRN TEMPA:WORD,TEMPB:WORD
DSEG ENDS
FIELD:
CALL FILSCN ;GET DATA BLOCK POINTER IN [B,C]
EXTRN DERFNO:NEAR
JNZ SHORT ??L020
JMP DERFNO ;error if File Not Opened
??L020:
SUB AL,LOW OFFSET MD_RND ;MAKE SURE ITS A RANDOM FILE
JZ SHORT ??L021
JMP DERBFM ;IF NOT, "BAD FILE MODE"
??L021:
XCHG BX,DX ;SAVE TEXT POINTER
MOV BX,OFFSET FD_SIZ ;POINT TO RECORD SIZE
ADD BX,CX
MOV BX,[BX] ;GET IT
MOV TEMPA,BX ;STORE MAX ALLOWED
MOV BX,0 ;ZERO MAX # OF CHARS
MOV TEMPB,BX
MOV AL,BH ;MAKE [A]=0
XCHG BX,DX ;GET BACK TEXT POINTER
MOV DX,OFFSET FD_DAT ;POINT TO 5.0 FIELD BUFFER
LOPFLD: XCHG BX,DX ;SAVE TEXT POINTER IN [D,E]
ADD BX,CX ;ADD ON DATA POINTER SO [H,L] NOW POINTS
;AT THE START OF THE DATA
MOV CH,AL ;SETUP COUNT OF CHARACTERS PAST BY
;IN DATA AREA, SO TOTAL IS NEVER GREATER THAN 128
XCHG BX,DX ;TEXT POINTER BACK INTO [H,L]
;[D,E]=POINTER INTO DATA AREA
MOV AL,BYTE PTR [BX] ;MORE "AS"S TO SCAN?
CMP AL,LOW 44 ;COMMA STARTS THE CLAUSE
JZ SHORT $ 3
RET ;BACK TO NEWSTT IF NOT
PUSH DX ;SAVE THE POINTER INTO THE DATA BLOCK
PUSH CX ;SAVE [B]=NUMBER OF CHARACTERS ALLOCATED
CALL GTBYTC ;READ NUMBER INTO [A] FROM TEXT
PUSH AX ;SAVE THIS NUMBER
CALL SYNCHR
DB OFFSET "A" ;SCAN THE "AS"
CALL SYNCHR
DB OFFSET "S"
CALL PTRGET ;GET A POINTER AT THE STRING DESCRIPTOR
CALL FRCSTR ;INTO [D,E]
POP AX ;GET THE NUMBER OF CHARACTERS
POP CX ;GET THE NUMBER ALREADY USED
POP SI ;XTHL
XCHG SI,BX
PUSH SI ;SAVE THE TEXT POINTER AND
;[H,L]=POINTER INTO DATA BLOCK
MOV CL,AL ;SAVE # OF CHARACTERS IN [C]
PUSH DX ;SAVE [D,E]
PUSH BX ;SAVE [H,L]
MOV BX,TEMPB ;GET TOTAL SO FAR
MOV CH,LOW 0 ;ACCUMULATE COUNT
ADD BX,CX ;Add in current field size
MOV TEMPB,BX ;SAVE TOTAL AGAIN
XCHG BX,DX ;TOTAL TO [D,E]
MOV BX,TEMPA ;GET MAX ALLOWED
CMP BX,DX ;IN RANGE?
JAE SHORT ??L022
JMP DERFOV ;NO, GIVE ERROR
??L022:
POP BX ;RESTORE [H,L]
POP DX ;RESTORE [D,E]
XCHG BX,DX ;[H,L] POINT AT STRING DESCRIPTOR
MOV BYTE PTR [BX],CL ;STORE THE LENGTH
INC BX
MOV [BX],DX ;STORE THE POINTER INTO THE DATA BLOCK
POP BX ;GET BACK THE TEXT POINTER
JMP SHORT LOPFLD ;CONTINUE SCANNING "AS" CLAUSES IF MORE
SUBTTL Random Non-I/O -- LSET/RSET/FIELD
;LSET/RSET stringvar = stringexp
;
; If stringvar points to an I/O buffer, use the string size to
;justify string. If stringvar is a literal, make new var with length
;of literal. If stringvar points to string space, use it. If the
;length of the variable is zero, return the null string. If a copy
;must be created, and stringexp is a temporary, use this space over
;unless length stringvar greater than stringexp.
RSET: OR AL,LOW 0 ;clear carry
JMP SHORT LSETA
LSET: STC ;Set carry if lset
LSETA:
PUSHF ;Save LSET/RSET flag
CALL PTRGET ;Get pointer to stringvar
CALL FRCSTR ;Must be a string variable
PUSH DX ;Save pointer to descriptor
CALL FRMEQL ;EAT "=" AND EVALUATE STRINGEXP
POP CX ; [B,C] = ptr to descr.
POP SI ;XTHL
XCHG SI,BX
PUSH SI ;Text ptr on bottom of stack
PUSH BX ;LSET/RSET flag next
PUSH CX ;Put descr. ptr back on
CALL FRESTR ;Error if not string, free temp.
MOV CH,BYTE PTR [BX] ;Get length of stringexp
POP SI ;XTHL
XCHG SI,BX
PUSH SI ; [H,L] = descr. of var,save othr
MOV AL,BYTE PTR [BX] ;Get length of stringvar
MOV CL,AL ;Save in [C]
PUSH CX ;Save lengths of both
PUSH BX ;Save descriptor pointer
PUSHF ;PSW zero if was temp.
INC BX
MOV DX,[BX] ;get point to stringvar text
OR AL,AL ;stringvar null?
JZ SHORT RETCUR ;Yes, don't change
MOV BX,TXTTAB
CMP BX,DX ;Stringvar in disk buffer?
JAE SHORT OLDSTR ;Yes, use it
MOV BX,VARTAB
CMP BX,DX ;stringvar in program(literal)?
JB SHORT OLDSTR ;No, in string space so use it
;Need to make new string for result since stringvar points to a literal.
;If stringexp was a temporary, it has been freed. If the length of
;stringexp is greater than or equal to the length of stringvar, GETSPA
;can be called and no garbage collection can occur so temp. can be reused.
;If stringvar is greater, must get a temp. to point to stringexp if it
;was a temp. , then call GETSPA which in this case can garbage collect.
MOV DL,CL
MOV DH,LOW 0 ;# BYTES TO ALLOCATE FOR RESULT
DSEG SEGMENT PUBLIC 'DATASG'
EXTRN STREND:WORD
DSEG ENDS
MOV BX,STREND
ADD BX,DX
XCHG BX,DX
MOV BX,FRETOP
CMP BX,DX ;will GETSPA garbage collect?
JB SHORT MAKDSC ;Yes, better have stringexp temp.
POPF ;get rid of temp indicator
MADESC: MOV AL,CL ;Get length of stringvar
CALL GETSPA ;Get space for result
POP BX ;Get stringvar descr.
POP CX ;Get lengths off stack
POP SI ;XTHL
XCHG SI,BX
PUSH SI ;Get what we wanted, stringexp descr.
PUSH DX
PUSH CX
CALL FRESTR ;Free temp if any
POP CX
POP DX
POP SI ;XTHL
XCHG SI,BX
PUSH SI
PUSH CX ;Restore stack to previous state
PUSH BX
INC BX
PUSHF
MOV [BX],DX ;set pointer to stringvar copy
OLDSTR: POPF
POP BX ;Get stringvar descr.
INC BX
MOV DX,[BX] ;Get pointer to text area
POP CX ;Get lengths off stack
POP BX ;Get pointer to stringexp descr.
INC BX ;point to address part
MOV BX,[BX] ;Get ptr to stringexp text
MOV AL,CL ;Get length of field(stringvar)
CMP AL,CH
JAE SHORT FILDOK ;Jump if field large enough for result
MOV CH,AL ;Save # of bytes to copy
FILDOK: SUB AL,CH
MOV CL,AL ;[C] = # blanks to fill
POPF ;Get LSET/RSET flag
JNAE SHORT ??L023
CALL BLKFIL ;Fill leading if RSET
??L023:
INC CH ;In case zero
COPLOP: DEC CH ;Decr. # to copy
JZ SHORT LRSTDN ;Done when all copied
MOV AL,BYTE PTR [BX] ;Get byte from stringexp
MOV DI,DX
STOSB ;Copy to stringvar
INC BX
INC DX
JMP SHORT COPLOP
RETCUR: POP CX
POP CX
POP CX
POP CX
POP CX ;Get garb off stack
LRSTDN: JNB SHORT ??L024
CALL BLKFIL ;Fill trailing if LSET
??L024:
POP BX ;Restore text pointer
RET
BLKFIL: MOV AL,LOW " " ;Fill with spaces
INC CL ;In case zero
BLKFL1: DEC CL ;Decr. # to fill
JNZ SHORT $ 3
RET ;Return when done
MOV DI,DX
STOSB ;Store space
INC DX
JMP SHORT BLKFL1
; If stringexp was a temporary, create a new temporary to point to
; stringexp since old one was freed. This must be done since GETSPA
; will be called and garbage collection might occur. If stringexp is
; not a temporary, return.
MAKDSC: POPF ;Get temp flag
POP BX
POP CX
POP SI ;XTHL
XCHG SI,BX
PUSH SI ;Dig down to stringexp descr.
XCHG BX,DX ;FRETMS wants [D,E]
JNZ SHORT MAKDS1 ;Not a temp, don't reallocate
PUSH CX
MOV AL,CH
CALL STRINI ;Make a temp point to stringexp
CALL PUTNEW ;Get a temp to point to it
POP CX
MAKDS1: POP SI ;XTHL
XCHG SI,BX
PUSH SI
PUSH CX
PUSH BX ;Restore stack to previous state
JMP MADESC
SUBTTL Program I/O -- Fixed Length INPUT
; Format:
; stringvar = INPUT$(#bytes[,[#] file#])
;If no file # is given, characters will be read from the user's
; terminal. No echoing will be done and no editing will be allowed
; (i.e. rubout,@,_,^U are just input as characters).
PUBLIC FIXINP
FIXINP: CALL CHRGTR
CALL SYNCHR
DB OFFSET "$" ;STRING FUNCTION
CALL SYNCHR
DB OFFSET "("
PUSH BX ;Preserve PTRFIL across INPUT$ so
MOV BX,PTRFIL ;cases like PRINT #2,INPUT$(3,#1)
MOV DX,0 ;will work properly.
MOV PTRFIL,DX ;(Clear PTRFIL in case no file number
POP SI ;XTHL
XCHG SI,BX
PUSH SI ;is specified.)
CALL GETBYT ;Get # of bytes to read
PUSH DX ;Save # of bytes to read
MOV AL,BYTE PTR [BX]
CMP AL,LOW 54O ;Read from disk file?
JNZ SHORT REDTTY ;No, from user's terminal
CALL CHRGTR
CALL FILSCN ;Set up file #
EXTRN DERFNO:NEAR
JNZ SHORT ??L025
JMP DERFNO ;error if File Not Open
??L025:
CMP AL,LOW OFFSET MD_SQO ;SEQUENTIAL OUTPUT FILE?
JNZ SHORT ??L026
JMP DERBFM
??L026: ;THEN BAD FILE MODE
CALL FILSET ;SET UP PTRFIL
XOR AL,AL ;SET ZERO FOR FLAG
REDTTY: LAHF ; PUSH PSW
XCHG AL,AH
PUSH AX
XCHG AL,AH ;NON ZERO SET IF TERMINAL I/O
CALL SYNCHR
DB OFFSET ")" ;Must have paren
POP AX ; POP PSW
XCHG AL,AH
SAHF ;Get flag off stack
POP SI ;XTHL
XCHG SI,BX
PUSH SI ;Save text ptr, [L]=# to read
LAHF ; PUSH PSW
XCHG AL,AH
PUSH AX
XCHG AL,AH ;Save flag
MOV AL,BL
OR AL,AL ;Read no characters?
JNZ SHORT ??L027
JMP FCERR ;Yes, error
??L027:
PUSH BX ;Save #
CALL STRINI ;Get space for string
XCHG BX,DX
POP CX ;[C] = # to read
FIXLOP: POP AX ; POP PSW
XCHG AL,AH
SAHF
LAHF ; PUSH PSW
XCHG AL,AH
PUSH AX
XCHG AL,AH ;NON-ZERO set if should read from TTY
JZ SHORT DSKCHR ;Read from disk file
CALL INCHRI ;Read a char from terminal
CHARCW:
;Note : will check flag on interrupt ^c
PUTCHR: MOV BYTE PTR [BX],AL ;Put char into string
INC BX
DEC CL ;Read enough yet?
JNZ SHORT FIXLOP ;No, read more
DSEG SEGMENT PUBLIC 'DATASG'
EXTRN SAVKEY:WORD ;Second half of two-byte key
DSEG ENDS
XOR AL,AL
MOV BYTE PTR SAVKEY,AL ;Clear saved second byte
POP AX ; POP PSW
XCHG AL,AH
SAHF ;Get flag off stack
POP CX ;B:=text pointer.
POP BX ;Restore PTRFIL.
MOV PTRFIL,BX
PUSH CX ;Restack the text pointer.
JMP PUTNEW ;Return string as result
DSKCHR: CALL INDSKC ;Get char from file
JAE SHORT ??L028
JMP DERRPE ;If carry, read past EOF
??L028:
JMP SHORT PUTCHR ;Put char in string
CSEG ENDS
END