COMMENT ⊗   VALID 00003 PAGES
C REC  PAGE   DESCRIPTION
C00001 00001
C00002 00002	entry OpenIn,OpenOut,!n!e!w!i!n!l!i!n!e
C00007 00003	internal simple integer procedure OpenOut(string FileName
C00011 ENDMK
C⊗;
entry OpenIn,OpenOut,!n!e!w!i!n!l!i!n!e;
begin "IOPkg"

define library!entry = true;
require "sys:std.hdr" source!file;


!*** History:   12-Nov-78       add escape and Warn stuff       -Raj.
                / / / / /       creation                        -J. Low.
;


define BIT(n)=[(1 lsh (35-n))];
define escape='33;
external integer !skip!;
boolean Warn;

internal integer !c!o!u!n!t,!b!r!c!h!a!r;
internal boolean array !n!e!w!i!n!l!i!n!e[0:15];

simple procedure InitCnt;
    !c!o!u!n!t := 200;
require InitCnt initialization;

internal simple integer procedure OpenIn(string FileName;
                 reference integer Eof; integer Mode(0));
begin "OpenIn"
   string Name,Ext,Dev,PPN;
   integer Chan,Flag;
   label Start;

   Warn := (Mode land (BIT(23))=0);     ! silent mode if bit 23 is on;
   Chan := GetChan;
   if Chan = -1 then
      begin
         if Warn then
            UserErr(0,1,"***OpenIn: All Channels are in use. (Limit"&
                        " of 16 open files).   OpenIn aborted.");
         return(-1);
      end;

 Start:
   Eof := true; ! want to handle Device errors here;

   while not FileScan(FileName,Dev,Name,Ext,PPN) do
      begin
         if not Warn then return(-1);
         OutStr(CrLf&Tab&"*** OpenIn: BAD FILENAME SYNTAX = """&
                FileName&"""."&CrLf&Tab&"ENTER FILENAME FROM "&
                "TERMINAL."&CrLf);
         OutStr("FILENAME? -");
         FileName := InChWL;
         if !skip!=escape then
           begin
              print("*** OpenIn aborted.", crlf);
              return(-1);      ! quit and exit;
           end;
      end;

   open(Chan,Dev,Mode,2,0,!c!o!u!n!t,!b!r!c!h!a!r,Eof);
   if Eof then
      begin
         if not Warn then return(-1);
         OutStr(CrLf&"***OpenIn- - Can't open Device """&
                Dev&""". Enter fileName from terminal."&CrLf);
         OutStr("FILEName? -");
         FileName := InChWL;
         if !skip!=escape then
           begin
              print("*** OpenIn aborted.", crlf);
              return(-1);      ! quit and exit;
           end;
         go to Start;
      end;
! now try the lookup;
   lookup(Chan,Name&"."&Ext&PPN,Flag);
   if Flag then
      begin
         if not Warn then
            begin
               release(Chan);
               return(-1);
            end;

         OutStr(CrLf&"***OpenIn- Can't open file """&
                FileName&""". Enter fileName from terminal."&CrLf);
         OutStr("FILEName? -");
         FileName := InChWL;
         if !skip!=escape then
            begin
               print("*** OpenIn aborted.", crlf);
               release(Chan);
               return(-1);
            end;
         go to Start;
      end;
   !n!e!w!i!n!l!i!n!e[Chan] := true; ! we're positioned at
                                       beginning of input line;
   return(Chan);
end "OpenIn";
internal simple integer procedure OpenOut(string FileName;
                 integer Mode(0));
begin "OpenOut"
   string Name,Ext,Dev,PPN;
   integer Chan,Flag,dummy,Eof;
   label Start;
   
   Warn := (Mode land (BIT(23))=0);     ! silent mode if bit 23 is on;
   Chan := GetChan;
   if Chan = -1 then
      begin
         if Warn then
            UserErr(0,1,"***OpenIn: All Channels are in use. (Limit"&
                        " of 16 open files).  OpenOut aborted.");
         return(-1);
      end;

 Start:
   while not FileScan(FileName,Dev,Name,Ext,PPN) do
      begin
         if not Warn then return(-1);
         OutStr(CrLf&Tab&"*** OpenOut: BAD FILEName SYNTAX = """&
                FileName&"""."&CrLf&Tab&"ENTER FILEName FROM "&
                "TERMINAL."&CrLf);
         OutStr("FILEName? -");
         FileName := InChWL;
         if !skip!=escape then
           begin
              print("*** OpenOut aborted.", crlf);
              return(-1);      ! quit and exit;
           end;
      end;
   Eof := true; ! want to handle Device errors here;
   open(Chan,Dev,Mode,0,2,dummy,dummy,Eof);
   if Eof then
      begin
         if not Warn then return(-1);
         OutStr(CrLf&"***OpenOut- - Can't open Device """&
                Dev&""". ENTER fileName from terminal."&CrLf);
         OutStr("FILEName? -");
         FileName := InChWL;
         if !skip!=escape then
           begin
              print("*** OpenOut aborted.", crlf);
              return(-1);      ! quit and exit;
           end;
         go to Start;
      end;
! now try the ENTER;
   Enter(Chan,Name&"."&Ext&PPN,Flag);
   if Flag then
      begin
         if not Warn then
            begin
               release(Chan);
               return(-1);
            end;

         OutStr(CrLf&"***OpenOut- Can't open file """&
                FileName&""". Enter fileName from terminal."&CrLf);
         OutStr("FILEName? -");
         FileName := InChWL;
         if !skip!=escape then
            begin
               print("*** OpenOut aborted.", crlf);
               release(Chan);
               return(-1);
            end;

         go to Start;
      end;
   return(Chan);
end "OpenOut";

end "IOPkg"