(DEFINE-FILE-INFO READTABLE "INTERLISP" PACKAGE "INTERLISP")

(FILECREATED "13-Sep-90 16:39:58" |{PELE:MV:ENVOS}<LISPCORE>SOURCES>AOFD.;4|
 34722  

      changes to%:  (FNS \BASEBYTES.IO.INIT \BASEBYTES.SETFILEPTR)

      previous date%: "16-May-90 12:01:06" |{PELE:MV:ENVOS}<LISPCORE>SOURCES>AOFD.;3|)


(* ; "
Copyright (c) 1981, 1982, 1983, 1984, 1985, 1986, 1987, 1990 by Venue & Xerox Corporation.  All rights reserved.
")

(PRETTYCOMPRINT AOFDCOMS)

(RPAQQ AOFDCOMS

       [

(* ;;; "streams (= OpenFileDescriptors)")


        (COMS (FNS \ADD-OPEN-STREAM \GENERIC-UNREGISTER-STREAM)
              (INITVARS (*ISSUE-CLOSE-WARNINGS* NIL))
              (FNS CLOSEALL CLOSEF EOFCLOSEF INPUT OPENP OUTPUT POSITION RANDACCESSP \IOMODEP 
                   WHENCLOSE)
              (FNS STREAMADDPROP)
              (INITVARS (DEFAULTEOFCLOSE 'NILL)
                     (\OPENFILES))
              (GLOBALVARS DEFAULTEOFCLOSE \OPENFILES))
        (COMS 
              (* ;; "STREAM interface to Read and Write to random memory")


              (DECLARE%: DONTCOPY (EXPORT (RECORDS BASEBYTESTREAM)))
              (FNS \BASEBYTES.IO.INIT \MAKEBASEBYTESTREAM \MBS.OUTCHARFN \BASEBYTES.NAME.FROM.STREAM
                   \BASEBYTES.BOUT \BASEBYTES.SETFILEPTR \BASEBYTES.READP \BASEBYTES.BIN 
                   \BASEBYTES.PEEKBIN \BASEBYTES.TRUNCATEFN \BASEBYTES.OPENFN \BASEBYTES.BLOCKIO)
              (GLOBALVARS \BASEBYTESDEVICE)
              (DECLARE%: DONTEVAL@LOAD (P (\BASEBYTES.IO.INIT)))
              (FNS OPENSTRINGSTREAM))
        [COMS 
              (* ;; "STREAM interface for old-style strings")


              (FNS \STRINGSTREAM.INIT)
              (DECLARE%: DONTEVAL@LOAD DOCOPY (P (\STRINGSTREAM.INIT]
        (COMS (FNS GETSTREAM \ADDOFD \CLEAROFD \DELETEOFD \GETSTREAM \SEARCHOPENFILES)
              (DECLARE%: DONTCOPY (EXPORT (MACROS \INSTREAMARG \OUTSTREAMARG \STREAMARG)))
              (MACROS GETOFD \GETOFD))
        (LOCALVARS . T)
        (DECLARE%: DONTEVAL@LOAD DOEVAL@COMPILE DONTCOPY COMPILERVARS (ADDVARS (NLAMA)
                                                                             (NLAML)
                                                                             (LAMA WHENCLOSE])



(* ;;; "streams (= OpenFileDescriptors)")


(DEFINEQ

(\ADD-OPEN-STREAM

  [LAMBDA (DEVICE STREAM)                                    (* hdj "28-May-86 11:22")
    (if
 (NOT (STREAMP STREAM))
        then
 (\ILLEGAL.ARG STREAM))
    (pushnew
 (fetch
 (FDEV OPENFILELST) of
 DEVICE)
           STREAM)
    STREAM])

(\GENERIC-UNREGISTER-STREAM

  [LAMBDA (DEVICE STREAM)                                    (* hdj "22-Sep-86 18:30")

(* ;;; "Remove an open stream from the list of streams kept by DEVICE.  Assumes the use of the FDEV's OPENFILELSTto store the streams.  Errors if passed a stream the device doesn't know about if *ISSUE-CLOSE-WARNINGS* is non-NIL.")

    (DECLARE
 (GLOBALVARS *ISSUE-CLOSE-WARNINGS*))
    (if
 (NOT (STREAMP STREAM))
        then
 (\ILLEGAL.ARG STREAM))
    (LET ((OPENFILELST (fetch
 (FDEV OPENFILELST) of
 DEVICE)))
         (if
 (AND *ISSUE-CLOSE-WARNINGS* (NOT (FMEMB STREAM OPENFILELST)))
             then
 (ERROR "Closing a stream that's not open!" STREAM))
         (replace
 (FDEV OPENFILELST) of
 DEVICE with
 (DREMOVE STREAM OPENFILELST))
         STREAM])
)

(RPAQ? *ISSUE-CLOSE-WARNINGS*
 NIL)
(DEFINEQ

(CLOSEALL

  [LAMBDA (ALLFLG)
    (DECLARE
 (LOCALVARS . T))                                (* hdj "11-Jul-86 10:33")
    (if
 MULTIPLE.STREAMS.PER.FILE.ALLOWED
        then
 (ERROR "CLOSEALL no longer supported")
      else
 (for
 STREAM in
 (PROG1 (APPEND \OPENFILES)         (* ; 
                                   "Need to APPEND because CLOSEF will remove things from \OPENFILES")
                                 ) when
 [AND (fetch
 USERVISIBLE of
 STREAM)
                                             (\IOMODEP
 STREAM NIL T)
                                             (OR ALLFLG (NOT (STREAMPROP STREAM 'CLOSEALL]
              collect
 (CLOSEF
 STREAM])

(CLOSEF

  [LAMBDA (FILE)                                             (* ; "Edited 17-Jan-87 16:08 by bvm:")
    (PROG ((STREAM (\GETSTREAM
 FILE)))
          (COND
             ((OR (\OUTTERMP STREAM)
                  (NOT (fetch
 USERCLOSEABLE of
 STREAM)))
              (RETURN NIL)))
          [MAPC (STREAMPROP STREAM 'BEFORECLOSE)
                (FUNCTION (LAMBDA (FN)
                            (APPLY* FN STREAM]
          (\CLEAROFD
)
          (COND
             ((EQ STREAM *STANDARD-INPUT*)
              (SETQ *STANDARD-INPUT* \LINEBUF.OFD)))
          (COND
             ((EQ STREAM *STANDARD-OUTPUT*)
              (SETQ *STANDARD-OUTPUT* \TERM.OFD)))
          (AND (NOT MULTIPLE.STREAMS.PER.FILE.ALLOWED)
               (\DELETEOFD
 STREAM))
          
          (* ;; "Logical close before physical close;  otherwise, we might have a logically open file with no physically open file behind it.  (Device LPT depends on this)")

          (\CLOSEFILE STREAM)
          [MAPC (STREAMPROP STREAM 'AFTERCLOSE)
                (FUNCTION (LAMBDA (FN)
                            (APPLY* FN STREAM]
          (RETURN (fetch
 FULLNAME of
 STREAM])

(EOFCLOSEF

  [LAMBDA (FILE)                                             (* bvm%: "15-Jan-85 17:58")
    (DECLARE
 (LOCALVARS . T))
    (PROG ((STREAM (GETSTREAM
 FILE)))
          (APPLY* (OR (STREAMPROP STREAM 'EOFCLOSE)
                      DEFAULTEOFCLOSE)
                 STREAM])

(INPUT

  [LAMBDA (FILE)                                             (* ; "Edited 17-Jan-87 16:08 by bvm:")
    (PROG1 (if
 (EQ *STANDARD-INPUT* \LINEBUF.OFD)
               then
 T
             else
 (if
 MULTIPLE.STREAMS.PER.FILE.ALLOWED
                      then
 *STANDARD-INPUT*
                    else
 (fetch
 FULLNAME of
 *STANDARD-INPUT*)))
           (COND
              (FILE (SETQ *STANDARD-INPUT* (COND
                                              ((EQ FILE T)   (* ; 
                                                 "Check explicitly for T to avoid needless creations")
                                               \LINEBUF.OFD)
                                              (T (\GETSTREAM
 FILE 'INPUT])

(OPENP

  [LAMBDA (FILE ACCESS)                                      (* hdj "29-Sep-86 17:41")
    (DECLARE
 (GLOBALVARS MULTIPLE.STREAMS.PER.FILE.ALLOWED \FILEDEVICES))
    (if
 (AND FILE (type?
 STREAM FILE))
        then
 (\GETSTREAM
 FILE ACCESS T)
      elseif
 FILE
        then
 NIL
      else
 (\MAP-OPEN-STREAMS (FUNCTION EVQ)
                  \FILEDEVICES NIL])

(OUTPUT

  [LAMBDA (FILE)                                             (* ; "Edited 17-Jan-87 16:08 by bvm:")
    (PROG1 (if
 (EQ *STANDARD-OUTPUT* \TERM.OFD)
               then
 T
             else
 (if
 MULTIPLE.STREAMS.PER.FILE.ALLOWED
                      then
 *STANDARD-OUTPUT*
                    else
 (fetch
 FULLNAME of
 *STANDARD-OUTPUT*)))
           (COND
              (FILE (SETQ *STANDARD-OUTPUT* (COND
                                               ((EQ FILE T)  (* ; 
                                  "Check for this special so we don't create a tty window needlessly")
                                                \TERM.OFD)
                                               (T (\GETSTREAM
 FILE 'OUTPUT])

(POSITION

  [LAMBDA (FILE N)                                           (* ; "Edited 17-Jan-87 16:08 by bvm:")
    (PROG [(STRM (COND
                    (FILE (\GETSTREAM
 FILE))
                    (T *STANDARD-OUTPUT*]
          (RETURN (PROG1 (fetch
 CHARPOSITION of
 STRM)
                         (COND
                            (N (replace
 CHARPOSITION of
 STRM with
 (COND
                                                                     ((IGREATERP N 0)
                                                                      N)
                                                                     (T 
                                                             (* ; "compatible with PDP-10 version")
                                                                        0])

(RANDACCESSP

  [LAMBDA (FILE)                                             (* rmk%: "14-OCT-83 15:32")
    (PROG ((STREAM (\GETSTREAM
 FILE)))
          (RETURN (AND (fetch
 RANDOMACCESSP of
 (fetch
 DEVICE of
 STREAM))
                       (NEQ STREAM \LINEBUF.OFD)
                       (fetch
 FULLNAME of
 STREAM])

(\IOMODEP

  [LAMBDA (STREAM ACCESS NOERROR)                            (* rmk%: "21-OCT-83 11:10")
          
          (* ;; "Returns STREAM if it represents a File open with access mode ACCESS")

    (COND
       ([COND
           ((NOT ACCESS)
            (fetch
 ACCESS of
 STREAM))
           ((EQ ACCESS (fetch
 ACCESS of
 STREAM)))
           [(EQ (fetch
 ACCESS of
 STREAM)
                'BOTH)
            (FMEMB ACCESS '(INPUT
 OUTPUT]
           ((EQ (fetch
 ACCESS of
 STREAM)
                'APPEND)
            (EQ ACCESS 'OUTPUT]
        STREAM)
       (T (\FILE.NOT.OPEN STREAM NOERROR])

(WHENCLOSE

  [LAMBDA NARGS                                              (* lmm " 2-Sep-84 16:07")
    (DECLARE
 (LOCALVARS . T))
    (PROG [(STREAM (AND (IGREATERP NARGS 0)
                        (GETSTREAM
 (ARG NARGS 1]
          [for
 I FN from
 2 to
 NARGS by
 2
             do
 [SETQ FN (AND (IGREATERP NARGS I)
                              (ARG NARGS (ADD1 I]
                (SELECTQ (ARG NARGS I)
                    (CLOSEALL [STREAMPROP STREAM 'CLOSEALL (SELECTQ FN
                                                               (NO T)
                                                               (YES NIL)
                                                               (ERRORX (LIST 27 FN])
                    (BEFORE (COND
                               (FN (STREAMADDPROP
 STREAM 'BEFORECLOSE FN T))))
                    (AFTER (COND
                              (FN (STREAMADDPROP
 STREAM 'AFTERCLOSE FN T))))
                    (STATUS (STREAMPROP STREAM 'STATUSFN FN))
                    (EOF (STREAMPROP STREAM 'EOFCLOSE FN))
                    (ERRORX (LIST 27 (ARG NARGS I]
          (RETURN STREAM])
)
(DEFINEQ

(STREAMADDPROP

  [LAMBDA (STREAM PROP VAL)
    (STREAMPROP STREAM PROP (CONS VAL (STREAMPROP STREAM PROP])
)

(RPAQ? DEFAULTEOFCLOSE
 'NILL)

(RPAQ? \OPENFILES
 )
(DECLARE%: DOEVAL@COMPILE DONTCOPY

(GLOBALVARS DEFAULTEOFCLOSE \OPENFILES)
)



(* ;; "STREAM interface to Read and Write to random memory")


(DECLARE%: DONTCOPY 
(* "FOLLOWING DEFINITIONS EXPORTED")

(DECLARE%: EVAL@COMPILE

(RECORD BASEBYTESTREAM
 STREAM (SUBRECORD STREAM)
                                 [ACCESSFNS ((BIASOFFST (fetch
 (STREAM FW6) of
 DATUM)
                                                    (replace
 (STREAM FW6) of
 DATUM
                                                       with
 NEWVALUE))
                                             (BBSNCHARS (fetch
 (STREAM FW7) of
 DATUM)
                                                    (replace
 (STREAM FW7) of
 DATUM
                                                       with
 NEWVALUE))
                                             (WRITEXTENSIONFN (fetch
 (STREAM F1) of
 DATUM)
                                                    (replace
 (STREAM F1) of
 DATUM
                                                       with
 NEWVALUE])
)

(* "END EXPORTED DEFINITIONS")

)
(DEFINEQ

(\BASEBYTES.IO.INIT

  [LAMBDA NIL
    (DECLARE
 (GLOBALVARS \BASECHARDEVICE))
           (* ; "Edited 13-Sep-90 16:27 by jds")


    (* ;; "Initialize the FDEV for base-bytes type devices (e.g. string streams).")


    (SETQ \BASEBYTESDEVICE
     (create
 FDEV
            DEVICENAME _ 'BASEBYTES
            RESETABLE _ T
            RANDOMACCESSP _ T
            PAGEMAPPED _ NIL
            FDBINABLE _ T
            FDBOUTABLE _ T
            FDEXTENDABLE _ NIL
            CLOSEFILE _ (FUNCTION NILL)
            DELETEFILE _ (FUNCTION NILL)
            DIRECTORYNAMEP _ (FUNCTION NILL)
            EVENTFN _ (FUNCTION NILL)
            GENERATEFILES _ (FUNCTION \GENERATENOFILES)
            GETFILEINFO _ (FUNCTION NILL)
            GETFILENAME _ (FUNCTION \BASEBYTES.NAME.FROM.STREAM)
            HOSTNAMEP _ (FUNCTION NILL)
            OPENFILE _ (FUNCTION \BASEBYTES.OPENFN)
            READPAGES _ (FUNCTION NILL)
            REOPENFILE _ [FUNCTION (LAMBDA (FILE ACCESS RECOG OTHERINFO FDEV STREAM)
                                     STREAM]
            SETFILEINFO _ (FUNCTION NILL)
            TRUNCATEFILE _ [FUNCTION (LAMBDA (STREAM I]
            WRITEPAGES _ (FUNCTION \ILLEGAL.DEVICEOP)
            BIN _ (FUNCTION \BASEBYTES.BIN)
            BOUT _ (FUNCTION \BASEBYTES.BOUT)
            PEEKBIN _ (FUNCTION \BASEBYTES.PEEKBIN)
            READP _ (FUNCTION \BASEBYTES.READP)
            BACKFILEPTR _ [FUNCTION (LAMBDA (STREAM)

                                      (* ;; "Back up the file pointer")


                                      (AND (NEQ (fetch
 COFFSET of
 STREAM)
                                                (fetch
 BIASOFFST of
 STREAM))
                                           (\PAGEDBACKFILEPTR STREAM))

                                      (* ;; "And fix charposition.")


                                      (replace
 BBSNCHARS of
 STREAM
                                         with
 (IDIFFERENCE (fetch
 COFFSET of
 STREAM)
                                                         (fetch
 BIASOFFST of
 STREAM]
            SETFILEPTR _ (FUNCTION \BASEBYTES.SETFILEPTR)
            GETFILEPTR _ [FUNCTION (LAMBDA (STREAM)
                                     (IDIFFERENCE (fetch
 COFFSET of
 STREAM)
                                            (fetch
 BIASOFFST of
 STREAM]
            GETEOFPTR _ [FUNCTION (LAMBDA (STREAM)
                                    (IDIFFERENCE (fetch
 EOFFSET of
 STREAM)
                                           (fetch
 BIASOFFST of
 STREAM]
            EOFP _ [FUNCTION (LAMBDA (STREAM)
                               (IGEQ (fetch
 COFFSET of
 STREAM)
                                     (fetch
 EOFFSET of
 STREAM]
            BLOCKIN _ [FUNCTION (LAMBDA (STREAM BASE OFFST N)
                                  (\BASEBYTES.BLOCKIO
 STREAM BASE OFFST N 'INPUT]
            BLOCKOUT _ [FUNCTION (LAMBDA (STREAM BASE OFFST N)
                                   (\BASEBYTES.BLOCKIO
 STREAM BASE OFFST N 'OUTPUT]
            RENAMEFILE _ (FUNCTION \ILLEGAL.DEVICEOP)))
    (\DEFINEDEVICE NIL \BASEBYTESDEVICE])

(\MAKEBASEBYTESTREAM

  [LAMBDA (BASE OFFST LEN ACCESS WRITEXTENSIONFN OSTREAM)    (* ; "Edited 17-Jan-87 16:08 by bvm:")
          
          (* ;; "If an error is to occur due to non-numeric arg or range restrictions, then let it happen outside the UNINTERRUPTABLY")

    (OR BASE (EQ LEN 0)
        (SHOULDNT))
    (OR (AND (SMALLP OFFST)
             (SMALLP LEN)
             (SMALLP (add
 LEN OFFST)))
        (SHOULDNT "Currently can't support fixp-sized offsets"))
    (SELECTQ ACCESS
        (NIL (SETQ ACCESS 'INPUT))
        ((INPUT OUTPUT BOTH))
        (\ILLEGAL.ARG ACCESS))
    (if
 (type?
 STREAM OSTREAM)
        then
 (if
 (EQ (ffetch
 (STREAM DEVICE) of
 OSTREAM)
                     \BASEBYTESDEVICE)
                 then
 (replace
 ACCESS of
 OSTREAM with
 NIL)
               else
 (CLOSEF
 OSTREAM)
                    (SETQ OSTREAM (create
 BASEBYTESTREAM
                                         DEVICE _ \BASEBYTESDEVICE smashing
 OSTREAM)))
      else
 (SETQ OSTREAM (create
 BASEBYTESTREAM
                                DEVICE _ \BASEBYTESDEVICE)))
    (UNINTERRUPTABLY
        (freplace
 USERCLOSEABLE of
 OSTREAM with
 NIL)
        (freplace
 USERVISIBLE of
 OSTREAM with
 NIL)
        (freplace
 BYTESIZE of
 OSTREAM with
 BITSPERBYTE)
        (freplace
 CPAGE of
 OSTREAM with
 (freplace
 EPAGE of
 OSTREAM with
 0))
        (freplace
 CBUFPTR of
 OSTREAM with
 BASE)
        (freplace
 COFFSET of
 OSTREAM with
 (freplace
 BIASOFFST of
 OSTREAM with
 OFFST))
        (freplace
 CBUFSIZE of
 OSTREAM with
 (freplace
 EOFFSET of
 OSTREAM with
 LEN))
        (replace
 ACCESS of
 OSTREAM with
 ACCESS)
          
          (* ;; "Insures that the BINABLE BOUTABLE and EXTENDABLE bits are setup setup, and that the correct BIN and BOUT fns are 'inherited' from the FDEV as well")

        (freplace
 FULLFILENAME of
 OSTREAM with
 NIL)
        (freplace
 OUTCHARFN of
 OSTREAM with
 (FUNCTION \MBS.OUTCHARFN))
        (freplace
 LINELENGTH of
 OSTREAM with
 0)
        (freplace
 CHARPOSITION of
 OSTREAM with
 0)
        (freplace
 WRITEXTENSIONFN of
 OSTREAM with
 (SELECTQ ACCESS
                                                      ((OUTPUT BOTH) 
                                                           WRITEXTENSIONFN)
                                                      NIL))
        (freplace
 BBSNCHARS of
 OSTREAM with
 0))
    OSTREAM])

(\MBS.OUTCHARFN

  [LAMBDA (STREAM CHAR)                                      (* JonL " 7-NOV-83 21:54")
    (BOUT (SETQ STREAM (\DTEST STREAM 'STREAM))
          CHAR)                                              (* ; 
                "The BBSNCHARS field *may* just be paralleling the CHARPOSITION field of the stream.")
    (add
 (ffetch
 BBSNCHARS of
 STREAM)
         1])

(\BASEBYTES.NAME.FROM.STREAM

  [LAMBDA (STREAM)                                           (* ; "Edited 17-Jan-87 16:08 by bvm:")
          
          (* ;; "STRING streams have a FULLFILENAME which is just the string itself;  other random basebytes streams have this field null")

    (OR (fetch
 FULLFILENAME of
 STREAM)
        (LIST (fetch
 CBUFPTR of
 STREAM)
              (fetch
 BIASOFFST of
 STREAM)
              (GETEOFPTR STREAM])

(\BASEBYTES.BOUT

  [LAMBDA (STREAM BYTE)                                      (* ; "Edited 17-Jan-87 16:08 by bvm:")
    (PROG (CO)
      A   (if
 (IGEQ (SETQ CO (fetch
 COFFSET of
 STREAM))
                    (fetch
 EOFFSET of
 STREAM))
              then
 (if
 (SETQ CO (fetch
 (BASEBYTESTREAM WRITEXTENSIONFN) of
 STREAM))
                       then
 (APPLY* CO STREAM)
                            (GO A)
                     else
 (ERROR "Attempt to write past end of bytes block")))
          (RETURN (\PUTBASEBYTE (fetch
 CBUFPTR of
 STREAM)
                         (PROG1 CO (freplace
 COFFSET of
 STREAM with
 (ADD1 CO)))
                         BYTE])

(\BASEBYTES.SETFILEPTR

  [LAMBDA (STREAM I)
                                     (* ; "Edited 13-Sep-90 16:30 by jds")


    (* ;; "SETFILEPTR for string streams &c.")


    (PROG ((I' I))
          (add
 I' (fetch
 BIASOFFST of
 STREAM))
          (if
 (IGREATERP I' (fetch
 EOFFSET of
 STREAM))
              then
 (ERROR "Beyond end of byte range" I)
            else
 

                  (* ;; "Fix both FILEPTR and CHARPOSITION to match.")


                  (replace
 COFFSET of
 STREAM with
 I')
                  (replace
 BBSNCHARS of
 STREAM with
 I'])

(\BASEBYTES.READP

  [LAMBDA (STREAM FLG)                                       (* ; "Edited 17-Jan-87 16:08 by bvm:")
    (PROG ((CO (fetch
 COFFSET of
 STREAM))
           (%#LEFT (fetch
 EOFFSET of
 STREAM)))
          (add
 %#LEFT (IMINUS CO))
          (RETURN (OR (IGEQ %#LEFT 2)
                      (if
 (EQ %#LEFT 0)
                          then
 NIL
                        elseif
 FLG
                        else
 (NEQ (\GETBASEBYTE (fetch
 CBUFPTR of
 STREAM)
                                         (fetch
 COFFSET of
 STREAM))
                                  (CHARCODE CR])

(\BASEBYTES.BIN

  [LAMBDA (STREAM)                                           (* JonL " 7-NOV-83 22:49")
          
          (* ;; "Normally, the microcoded version of BIN will handle this, since the BINABLE flag is set and since the COFFSET etc fields are setup appropriately")
          
          (* ;; 
        "Remember also that the VAX version installs a different STRMBINFN for the stringstream case")

    (PROG1 (\BASEBYTES.PEEKBIN
 STREAM)
           (add
 (fetch
 COFFSET of
 STREAM)
                1])

(\BASEBYTES.PEEKBIN

  [LAMBDA (STREAM NOERRORFLG)                                (* ; "Edited 17-Jan-87 16:08 by bvm:")
    (PROG ((CO (fetch
 COFFSET of
 STREAM)))
          (SELECTQ (SYSTEMTYPE)
              (VAX (if
 (fetch
 FULLNAME of
 STREAM)
                       then
                                  (* ; "Aha, it's a string stream")
                            (RETURN (\STRINGPEEKBIN STREAM NOERRORFLG))))
              NIL)
          (RETURN (if
 (IGEQ CO (fetch
 EOFFSET of
 STREAM))
                      then
 (if
 (NOT NOERRORFLG)
                               then
 (STREAMOP 'ENDOFSTREAMOP STREAM STREAM))
                    else
 (\GETBASEBYTE (fetch
 CBUFPTR of
 STREAM)
                                CO])

(\BASEBYTES.TRUNCATEFN

  [LAMBDA (STREAM I)                                         (* JonL " 7-NOV-83 22:20")
    ([LAMBDA (I' BO EO)
       (add
 I' BO)
       (if
 (ILESSP I 0)
           then
 (add
 I' EO))
       (if
 (OR (ILESSP I BO)
               (IGREATERP I' EO))
           then
 (ERROR "Beyond end of byte range" I)
         else
 (replace
 EOFFSET of
 STREAM with
 I']
     I
     (fetch
 BIASOFFST of
 STREAM)
     (fetch
 EOFFSET of
 STREAM])

(\BASEBYTES.OPENFN

  [LAMBDA (NAME ACCESS RECOG OTHERINFO FDEV)                 (* ; "Edited 17-Jan-87 16:08 by bvm:")
    (if
 (fetch
 FULLFILENAME of
 NAME)
        then
 (OPENSTRINGSTREAM
 NAME ACCESS)
      else
 (\MAKEBASEBYTESTREAM
 (fetch
 CBUFPTR of
 NAME)
                  (fetch
 BIASOFFST of
 NAME)
                  (GETEOFPTR NAME)
                  ACCESS
                  (fetch
 WRITEXTENSIONFN of
 NAME)
                  NAME])

(\BASEBYTES.BLOCKIO

  [LAMBDA (STREAM BASE OFFST N DIRECTION)                    (* ; "Edited 17-Jan-87 16:08 by bvm:")
    (PROG (SBASE CO EO)
      A   (if
 (ILEQ N 0)
              then
 (RETURN))
          (SETQ SBASE (fetch
 CBUFPTR of
 STREAM))
          (SETQ CO (fetch
 COFFSET of
 STREAM))
          (SETQ EO (fetch
 EOFFSET of
 STREAM))
          (if
 (IGREATERP N (IDIFFERENCE EO (SUB1 CO)))
              then
 (if
 (EQ DIRECTION 'INPUT)
                       then
 (STREAMOP 'ENDOFSTREAMOP STREAM STREAM)
                     else
                                    (* ; 
                                      "Do a single BOUT to see if the WRITEXTENSIONFN will fix it up")
                          (BOUT STREAM (\GETBASEBYTE BASE OFFST))
                          (add
 OFFST 1)
                          (add
 N -1)
                          (GO A)))
          (replace
 COFFSET of
 STREAM with
 (IPLUS CO N))
          (if
 (EQ DIRECTION 'OUTPUT)
              then
 (swap
 SBASE BASE)
                   (swap
 CO OFFST))
          (\MOVEBYTES SBASE CO BASE OFFST N])
)
(DECLARE%: DOEVAL@COMPILE DONTCOPY

(GLOBALVARS \BASEBYTESDEVICE)
)
(DECLARE%: DONTEVAL@LOAD 

(\BASEBYTES.IO.INIT
)
)
(DEFINEQ

(OPENSTRINGSTREAM

  [LAMBDA (STR ACCESS)                                       (* rmk%: "28-Mar-85 08:40")
          
          (* ;; "Does not register the stream on \OPENFILES, nor does it search \OPENFILES for a previously opened stream.  Thus, this implementation does not side-effect the string as the 10 does.  However, the temporary coercion of strings to open streams in \GETSTREAM does simulate the side-effecting.  Note that a string stream is unnamed.")

    (PROG (STREAM FATP)
          (OR (STRINGP STR)
              (\ILLEGAL.ARG STR))
          (SETQ FATP (ffetch
 (STRINGP FATSTRINGP) of
 STR))
          [SETQ STREAM (\MAKEBASEBYTESTREAM
 (OR (ffetch
 (STRINGP BASE) of
 STR)
                                                T)
                              (COND
                                 (FATP (UNFOLD (ffetch
 (STRINGP OFFST) of
 STR)
                                              BYTESPERWORD))
                                 (T (ffetch
 (STRINGP OFFST) of
 STR)))
                              (COND
                                 (FATP (UNFOLD (ffetch
 (STRINGP LENGTH) of
 STR)
                                              BYTESPERWORD))
                                 (T (ffetch
 (STRINGP LENGTH) of
 STR)))
                              (SELECTQ ACCESS
                                  ((INPUT OUTPUT BOTH) 
                                       ACCESS)
                                  (NIL 'INPUT)
                                  (\ILLEGAL.ARG ACCESS]
          (PROGN                                             (* ; 
                                      "Minor differences between a basebytestream and a stringstream")
                 (if
 FATP
                     then
 (freplace
 (STREAM CHARSET) of
 STREAM with
 \NORUNCODE))
                 (freplace
 USERCLOSEABLE of
 STREAM with
 T)
                 (freplace
 USERVISIBLE of
 STREAM with
 T)
                 (SELECTQ (SYSTEMTYPE)
                     (VAX (freplace
 F2 of
 STREAM with
 0)
                          (freplace
 STRMBINFN of
 STREAM with
 (FUNCTION \STRINGBIN)))
                     NIL))
          (RETURN STREAM])
)



(* ;; "STREAM interface for old-style strings")


(DEFINEQ

(\STRINGSTREAM.INIT

  [LAMBDA NIL                                                (* bvm%: "14-Feb-85 00:25")
    (SETQ \STRINGSTREAM.FDEV (create
 FDEV
                                    DEVICENAME _ 'STRING
                                    CLOSEFILE _ (FUNCTION NILL)
                                    DELETEFILE _ (FUNCTION NILL)
                                    DIRECTORYNAMEP _ (FUNCTION NILL)
                                    EVENTFN _ (FUNCTION NILL)
                                    GENERATEFILES _ (FUNCTION \NULLFILEGENERATOR)
                                    GETFILEINFO _ (FUNCTION NILL)
                                    GETFILENAME _ (FUNCTION NILL)
                                    HOSTNAMEP _ (FUNCTION NILL)
                                    OPENFILE _ (FUNCTION NILL)
                                    READPAGES _ (FUNCTION \ILLEGAL.DEVICEOP)
                                    REOPENFILE _ [FUNCTION (LAMBDA (FILE ACCESS RECOG OTHERINFO FDEV 
                                                                         STREAM)
                                                             STREAM]
                                    SETFILEINFO _ (FUNCTION NILL)
                                    TRUNCATEFILE _ (FUNCTION NILL)
                                    WRITEPAGES _ (FUNCTION \ILLEGAL.DEVICEOP)
                                    BIN _ [FUNCTION (LAMBDA (STREAM)
                                                      (replace
 F2 of
 STREAM
                                                         with
 (COND
                                                                 ((fetch
 F1 of
 STREAM)
                                                                  (PROG1 (fetch
 F1 of
 STREAM)
                                                                         (replace
 F1 of
 STREAM
                                                                            with
 NIL)))
                                                                 ((GNCCODE (fetch
 FULLFILENAME
                                                                              of
 STREAM)))
                                                                 (T (\EOF.ACTION STREAM]
                                    PEEKBIN _ [FUNCTION (LAMBDA (STREAM NOERRORFLG)
                                                          (OR (fetch
 F1 of
 STREAM)
                                                              (CHCON1 (fetch
 FULLFILENAME
                                                                         of
 STREAM))
                                                              (AND (NOT NOERRORFLG)
                                                                   (\EOF.ACTION STREAM]
                                    READP _ [FUNCTION (LAMBDA (STREAM)
                                                        (NOT (EOFP STREAM]
                                    BACKFILEPTR _ [FUNCTION (LAMBDA (STREAM)
                                                              (replace
 F1 of
 STREAM
                                                                 with
 (fetch
 F2 of
 STREAM]
                                    EOFP _ (FUNCTION (LAMBDA (STREAM)
                                                       (AND (NOT (fetch
 F1 of
 STREAM))
                                                            (EQ (NCHARS (fetch
 FULLFILENAME
                                                                           of
 STREAM))
                                                                0])
)
(DECLARE%: DONTEVAL@LOAD DOCOPY 

(\STRINGSTREAM.INIT
)
)
(DEFINEQ

(GETSTREAM

  [LAMBDA (FILE ACCESS NOERROR)                              (* rrb "31-Oct-85 09:36")
                                                             (* ; "USER ENTRY")
    (\GETSTREAM
 FILE ACCESS NOERROR])

(\ADDOFD

  [LAMBDA (STREAM)                                           (* rmk%: "21-OCT-83 16:32")
          
          (* ;; "Returns the STREAM it adds to \OPENFILES")

    (\CLEAROFD
)
    (AND (fetch
 NAMEDP of
 STREAM)
         (push
 \OPENFILES STREAM))
    STREAM])

(\CLEAROFD

  [LAMBDA NIL                                                (* lmm "30-SEP-80 20:08")
                                                             (* ; 
                                                "If GETOFD caches its args, this can clear the cache")
    NIL])

(\DELETEOFD

  [LAMBDA (OFD)                                              (* rmk%: "25-OCT-79 08:20")
    (SETQ \OPENFILES (DREMOVE OFD \OPENFILES])

(\GETSTREAM

  [LAMBDA (X ACCESS NOERROR)                                 (* ; "Edited 17-Jan-87 16:08 by bvm:")
          
          (* ;; "\GETSTREAM accepts a stream, NIL, T, or a window, and returns a corresponding stream.  ACCESS is INPUT, OUTPUT, APPEND, BOTH or NIL.  NOERROR, if non-NIL, means to return NIL if the file is not open in the specified access mode; otherwise, an error is caused.")

    (DECLARE
 (GLOBALVARS \DEFAULTLINEBUF \DEFAULTTTYDISPLAYSTREAM))
    (COND
       ((NULL X)
        (SELECTQ ACCESS
            (INPUT (COND
                      ((AND (EQ *STANDARD-INPUT* \DEFAULTLINEBUF)
                            (EQ \KEYBOARD.STREAM (fetch
 (LINEBUFFER KEYBOARDSTREAM) of
 \LINEBUF.OFD))
                            )
                       (\CREATE.TTYDISPLAYSTREAM)))
                   *STANDARD-INPUT*)
            (OUTPUT (COND
                       ((AND \DEFAULTTTYDISPLAYSTREAM (EQ *STANDARD-OUTPUT* \DEFAULTTTYDISPLAYSTREAM)
                             )
                        (\CREATE.TTYDISPLAYSTREAM)))
                    *STANDARD-OUTPUT*)
            (\IOMODEP
 (COND
                         ((NOT (EQ *STANDARD-INPUT* \LINEBUF.OFD))
                          *STANDARD-INPUT*)
                         (T *STANDARD-OUTPUT*))
                   ACCESS NOERROR)))
       ((EQ X T)
        (SELECTQ ACCESS
            (INPUT (COND
                      ((EQ \LINEBUF.OFD \DEFAULTLINEBUF)
                       (\CREATE.TTYDISPLAYSTREAM)))
                   \LINEBUF.OFD)
            ((OUTPUT NIL) 
                 (COND
                    ((AND \DEFAULTTTYDISPLAYSTREAM (EQ \TERM.OFD \DEFAULTTTYDISPLAYSTREAM))
                     (\CREATE.TTYDISPLAYSTREAM)))
                 \TERM.OFD)
            (\FILE.NOT.OPEN X NOERROR)))
       ((type?
 STREAM X)
        (\IOMODEP
 X ACCESS NOERROR))
       ((LITATOM X)
        (AND (NOT NOERROR)
             (ERROR "LITATOM 'streams' no longer supported" X)))
       ((AND (OR (EQ ACCESS 'OUTPUT)
                 (NULL ACCESS))
             (type?
 WINDOW X))
        (fetch
 (WINDOW DSP) of
 X))
       (T (\FILE.NOT.OPEN X NOERROR])

(\SEARCHOPENFILES

  [LAMBDA (NAME ACCESS)                                      (* rmk%: "14-OCT-83 15:04")
          
          (* ;; "Returns a stream whose fullname is NAME if it has accessmode ACCESS")

    (for
 STREAM in
 \OPENFILES when
 (EQ NAME (fetch
 FULLNAME of
 STREAM))
       do
 (RETURN (COND
                     (ACCESS (\IOMODEP
 STREAM ACCESS T))
                     (T STREAM])
)
(DECLARE%: DONTCOPY 
(* "FOLLOWING DEFINITIONS EXPORTED")

(DECLARE%: EVAL@COMPILE 

(PUTPROPS \INSTREAMARG
 MACRO
 ((STRM NOERRORFLG)
                                      (\GETSTREAM
 STRM 'INPUT NOERRORFLG)))

(PUTPROPS \OUTSTREAMARG
 MACRO
 ((STRM NOERRORFLG)
                                       (\GETSTREAM
 STRM 'OUTPUT NOERRORFLG)))

(PUTPROPS \STREAMARG
 MACRO
 [OPENLAMBDA (STRM NOERRORFLG)
                                          (COND
                                             (NOERRORFLG (\GETSTREAM
 STRM NIL T))
                                             (T (\DTEST STRM 'STREAM])
)

(* "END EXPORTED DEFINITIONS")

)
(DECLARE%: EVAL@COMPILE 

(PUTPROPS GETOFD
 MACRO
 (= . GETSTREAM))

(PUTPROPS \GETOFD
 MACRO
 (= . \GETSTREAM))
)
(DECLARE%: DOEVAL@COMPILE DONTCOPY

(LOCALVARS . T)
)
(DECLARE%: DONTEVAL@LOAD DOEVAL@COMPILE DONTCOPY COMPILERVARS 

(ADDTOVAR NLAMA
 )

(ADDTOVAR NLAML
 )

(ADDTOVAR LAMA
 WHENCLOSE)
)
(PUTPROPS AOFD COPYRIGHT ("Venue & Xerox Corporation" 1981 1982 1983 1984 1985 1986 1987 1990))
(DECLARE%: DONTCOPY
  (FILEMAP (NIL (2304 3411 (\ADD-OPEN-STREAM 2314 . 2591) (\GENERIC-UNREGISTER-STREAM 2593 . 3409)) (
3452 10531 (CLOSEALL 3462 . 4167) (CLOSEF 4169 . 5353) (EOFCLOSEF 5355 . 5651) (INPUT 5653 . 6407) (
OPENP 6409 . 6808) (OUTPUT 6810 . 7566) (POSITION 7568 . 8380) (RANDACCESSP 8382 . 8727) (\IOMODEP 
8729 . 9366) (WHENCLOSE 9368 . 10529)) (10532 10654 (STREAMADDPROP 10542 . 10652)) (11820 23932 (
\BASEBYTES.IO.INIT 11830 . 15026) (\MAKEBASEBYTESTREAM 15028 . 17621) (\MBS.OUTCHARFN 17623 . 18011) (
\BASEBYTES.NAME.FROM.STREAM 18013 . 18476) (\BASEBYTES.BOUT 18478 . 19195) (\BASEBYTES.SETFILEPTR 
19197 . 19818) (\BASEBYTES.READP 19820 . 20456) (\BASEBYTES.BIN 20458 . 20989) (\BASEBYTES.PEEKBIN 
20991 . 21772) (\BASEBYTES.TRUNCATEFN 21774 . 22278) (\BASEBYTES.OPENFN 22280 . 22770) (
\BASEBYTES.BLOCKIO 22772 . 23930)) (24055 26305 (OPENSTRINGSTREAM 24065 . 26303)) (26362 29998 (
\STRINGSTREAM.INIT 26372 . 29996)) (30060 33611 (GETSTREAM 30070 . 30293) (\ADDOFD 30295 . 30582) (
\CLEAROFD 30584 . 30865) (\DELETEOFD 30867 . 31018) (\GETSTREAM 31020 . 33184) (\SEARCHOPENFILES 33186
 . 33609)))))
STOP