Fix compilation of the JEDI package. Old Delphi versions have {$WEAKPACKAGEUNIT} while newer ones also seem to allow {$WEAKPACKAGENUNIT ON}... :/ (analogous for DENYPACKAGEUNIT...)

scanner.pas, tscannerfile:
  + new method readoptionalstate which reads a state like readstate, but if it encounters the closing } then it returns the provided fallback state
scandir.pas:
  + do_moduleflagswitch: new parameter optional that triggers the use of readoptionalstate instead of readstate
  * dir_weakpackageunit & dir_denypackageunit: the ON/OFF is optional

git-svn-id: trunk@33515 -

compiler/scandir.pas

@@ -118,11 +118,14 @@ unit scandir;
       end;
 
 
-    procedure do_moduleflagswitch(flag:cardinal);
+    procedure do_moduleflagswitch(flag:cardinal;optional:boolean);
       var
         state : char;
       begin
-        state:=current_scanner.readstate;
+        if optional then
+          state:=current_scanner.readoptionalstate('+')
+        else
+          state:=current_scanner.readstate;
         if state='-' then
           current_module.flags:=current_module.flags and not flag
         else
@@ -381,7 +384,7 @@ unit scandir;
 
     procedure dir_denypackageunit;
       begin
-        do_moduleflagswitch(uf_package_deny);
+        do_moduleflagswitch(uf_package_deny,true);
       end;
 
     procedure dir_description;
@@ -1584,7 +1587,9 @@ unit scandir;
 
     procedure dir_weakpackageunit;
       begin
-        do_moduleflagswitch(uf_package_weak);
+        { old Delphi versions seem to use merely $WEAKPACKAGEUNIT while newer
+          Delphis have $WEAPACKAGEUNIT ON... :/ }
+        do_moduleflagswitch(uf_package_weak, true);
       end;
 
     procedure dir_writeableconst;

compiler/scanner.pas

@@ -211,6 +211,7 @@ interface
           function  readcomment:string;
           function  readquotedstring:string;
           function  readstate:char;
+          function  readoptionalstate(fallback:char):char;
           function  readstatedefault:char;
           procedure skipspace;
           procedure skipuntildirective;
@@ -4222,6 +4223,37 @@ type
       end;
 
 
+    function tscannerfile.readoptionalstate(fallback:char):char;
+      var
+        state : char;
+      begin
+        state:=' ';
+        if c=' ' then
+         begin
+           current_scanner.skipspace;
+           if c='}' then
+             state:=fallback
+           else
+             begin
+               current_scanner.readid;
+               if pattern='ON' then
+                state:='+'
+               else
+                if pattern='OFF' then
+                 state:='-';
+             end;
+         end
+        else
+          if c='}' then
+            state:=fallback
+          else
+            state:=c;
+        if not (state in ['+','-']) then
+         Message(scan_e_wrong_switch_toggle);
+        readoptionalstate:=state;
+      end;
+
+
     function tscannerfile.readstatedefault:char;
       var
         state : char;