⟦6d644bdaf⟧

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!             ***  tcleartemp  ***
;
;
; catalog cleaning program  - used when a user process is removed from sos
!

cleartemp
begin
  !sections 4;
  !fp.no;
  procedure next_entry (.w3.;w1);
  comment   return w1   buf adr of next entry or 0 (after end doc.)
  ;

  procedure remove_entry (.w3.;w1);
  comment   call   w1   buf adr of entry
  ;

  procedure transport (.w3.;w1);
  comment   return w1   bytes transferred
  ;


  label interrupt, initialize, finis;
  record entry ( byte fslice,catkeys;
                 double catbase;
                 text(11) name
               );
  incode
  word mee;
  word nul:= 0;
  word maxtempkey:= 2;
  byte m_op:= 3, m_mode:= 0;
  ref buffirst, buflast;
  word m_segm:= 0;
  text(14) catalog:= "catalog";
  word lmaxbase, umaxbase, lstdbase, ustdbase, lcatbase, ucatbase;
  byte finis_op:= 2, finis_mode:= 1; text(20) finis_t:= "finis";
  double pname1, pname2;


  begin
    mee:= w3;
  interrupt:
    w3:= address(interrupt);
    w0:= 0;
    monitor(0); comment set interrupt;
    goto initialize;
    w1+0; w1+0; w1+0; w1+0;
    goto finis;

  initialize:
    w3:= mee+24;
    w2:= (w3).word;  comment topcore;
    buffirst:= w1;
    w0:= w2-w1 lshift -9 lshift 9 + w1 - 2;
    buflast:= w0;

    w3:= w3+44;
    f1:= (w3).double;
    lcatbase:= w0;  ucatbase:= w1;
    w3+4;
    f1:= (w3).double;
    lmaxbase:= w0;  umaxbase:= w1;
    w3+4;
    f1:= (w3).double;
    lstdbase:= w0;  ustdbase:= w1;


    comment main program;
    next_entry(.w3.,w1:=0);
    while w1<>0 do
    begin
      w0:= (w1).catkeys extract 3;
      if w0<=maxtempkey then
      begin
        f3:= (w1).catbase;
        if w2>=lstdbase then
        if w3<=ustdbase then
        remove_entry(.w3.,w1);
      end;
      next_entry(.w3.,w1);
    end;

    w3:= address(catalog);
    monitor(64); comment remove;
    w0:= lcatbase; w1:= ucatbase;
    w3:= address(nul); comment myself;
    monitor(72); comment set catbase;

  finis:
    w3:= mee+50;
    w3:= (w3).word+2;
    pname1:= f1:= (w3).double;
    w3+4;
    pname2:= f1:= (w3).double;
    w1:= address(finis_op); w3:= address(pname1);
    monitor(16);
    monitor(18);
  end;


    body of next_entry
    begin
      incode
      word savew0; ref return;
      ref lastentry:= 0, nextsegm:= 0, lastsegm:= 0;
        comment pointers in catalog buffer,
                nextsegm is start of next catalog segment,
                lastsegm is end of last segment transferred;
      begin
        return:= w3; savew0:= w0; w1:= lastentry;

        if w1+(34+33)<nextsegm then w1-33
        else
        begin
          if w1>lastsegm then
          begin comment start catalog scan or change databuf;
            transport(.w3.,w1); comment return: bytes transferred;
            if w1<>0 then
            begin
              w0:= b.buffirst;
              w0+w1-1;
              lastsegm:= w0;
              w1:= b.buffirst;
              w0:= w1+512;
              nextsegm:= w0;
            end;
          end
          else
          begin
            w1:= nextsegm;
            w0:= w1+512;
            nextsegm:= w0;
          end;
        end;

        w0:= savew0; w3:= return;  lastentry:= w1;
      end;
    end;

    body of remove_entry
    begin
      incode
      word savew0,savew1; ref return;
      word help;
      begin
        return:= w3;savew1:= w1; savew0:= w0;
        w3:= address(b.nul);
        f1:= (w1).catbase; ! set catalog base !
        monitor (72); ! to that of entry !
        w1:= savew1;
        w3:= w1 + 6;
        monitor(48);
        w0:= savew0; w3:= return;
      end;
    end;


    body of transport
    begin
      label rep;
      incode
      word status, bytes, chars, w4, w5,w6, w7,w8;
      word savew0; double savef3;
      begin
        savew0:= w0; savef3:= f3;
      rep:
        w1:= address(b.m_op);
        w3:= address(b.catalog);
        monitor(16);
        w1:= address(status);
        monitor(18);
        w2:= 1 lshift w0 or status; comment compute status;
        if w0=2 then w0:= 5;
        if w0=5 then
        begin comment create area process;
          monitor(52);
          if w0=0 then goto rep;
        end;
        if w1:=bytes<>0 then b.m_segm:= w0:= w1 lshift -9 + b.m_segm;
        if w2=2 then
        begin
          if w1=0 then goto rep; comment stopped;
        end
        else
        begin
          if w2<>262146 comment end-doc; then
          begin
            comment hard error;
            key(b.pname1):= w1;
          end;
        end;
        w0:= savew0; f3:= savef3;
      end;
    end;
end.
▶EOF◀
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