terminal_interface-curses-forms-field_types__adb.htm

ncurses-5.4

      <FONT COLOR=green><EM>--  complicated to write portable routine that reads the arguments,</EM></FONT>
      <FONT COLOR=green><EM>--  because one has to know the growth direction of the stack and</EM></FONT>
      <FONT COLOR=green><EM>--  the sizes of the individual arguments.</EM></FONT>
      <FONT COLOR=green><EM>--  Fortunately we are only interested in the first argument (#0),</EM></FONT>
      <FONT COLOR=green><EM>--  we know its size and for the first arg we don't care about</EM></FONT>
      <FONT COLOR=green><EM>--  into which stack direction we have to proceed. We simply</EM></FONT>
      <FONT COLOR=green><EM>--  resolve the double indirection and thats it.</EM></FONT>
      <b>type</b> <FONT COLOR=red><A NAME="105_12">V</A></FONT> <b>is</b> <b>access</b> <b>all</b> System.Address;
      <b>function</b> <FONT COLOR=red><A NAME="106_16">To_Access</A></FONT> <b>is</b> <b>new</b> Ada.Unchecked_Conversion (System.Address,
                                                          <A HREF="terminal_interface-curses-forms-field_types__adb.htm#105_12">V</A>);
   <b>begin</b>
      <b>return</b> <A HREF="terminal_interface-curses-forms-field_types__adb.htm#106_16">To_Access</A> (<A HREF="terminal_interface-curses-forms-field_types__adb.htm#106_16">To_Access</A> (<A HREF="terminal_interface-curses-forms-field_types__ads.htm#162_23">Args</A>).<b>all</b>).<b>all</b>;
   <b>end</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#162_13">Make_Arg</A><A HREF="terminal_interface-curses-forms-field_types__ads.htm#162_13">;</A>

   <b>function</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#167_13">Copy_Arg</A> (<A HREF="terminal_interface-curses-forms-field_types__ads.htm#167_23">Usr</A> : System.Address) <b>return</b> System.Address
   <b>is</b>
   <b>begin</b>
      <b>return</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#167_23">Usr</A>;
   <b>end</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#167_13">Copy_Arg</A><A HREF="terminal_interface-curses-forms-field_types__ads.htm#167_13">;</A>

   <b>procedure</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#172_14">Free_Arg</A><FONT COLOR=red><A NAME="118_14"></A></FONT> (<A HREF="terminal_interface-curses-forms-field_types__ads.htm#172_24">Usr</A> : <b>in</b> System.Address)
   <b>is</b>
      <b>procedure</b> <FONT COLOR=red><A NAME="120_17">Free_Type</A></FONT> <b>is</b> <b>new</b> Ada.Unchecked_Deallocation
        (<A HREF="terminal_interface-curses-forms-field_types__ads.htm#52_9">Field_Type</A>'Class, <A HREF="terminal_interface-curses-forms-field_types__ads.htm#63_9">Field_Type_Access</A>);
      <b>procedure</b> <FONT COLOR=red><A NAME="122_17">Freeargs</A></FONT> <b>is</b> <b>new</b> Ada.Unchecked_Deallocation
        (<A HREF="terminal_interface-curses-forms-field_types__ads.htm#211_9">Argument</A>, <A HREF="terminal_interface-curses-forms-field_types__ads.htm#216_9">Argument_Access</A>);

      <FONT COLOR=red><A NAME="125_7">To_Be_Free</A></FONT> : <A HREF="terminal_interface-curses-forms-field_types__ads.htm#216_9">Argument_Access</A> := <A HREF="terminal_interface-curses-forms-field_types__adb.htm#55_13">To_Argument_Access</A> (<A HREF="terminal_interface-curses-forms-field_types__ads.htm#172_24">Usr</A>);
      <FONT COLOR=red><A NAME="126_7">Low_Level</A></FONT>  : <A HREF="terminal_interface-curses-forms-field_types__ads.htm#132_9">C_Field_Type</A>;
   <b>begin</b>
      <b>if</b> <A HREF="terminal_interface-curses-forms-field_types__adb.htm#125_7">To_Be_Free</A> /= <b>null</b> <b>then</b>
         <b>if</b> <A HREF="terminal_interface-curses-forms-field_types__adb.htm#125_7">To_Be_Free</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#213_7">Usr</A> /= System.Null_Address <b>then</b>
            <A HREF="terminal_interface-curses-forms-field_types__adb.htm#126_7">Low_Level</A> := <A HREF="terminal_interface-curses-forms-field_types__adb.htm#125_7">To_Be_Free</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#214_7">Cft</A>;
            <b>if</b> <A HREF="terminal_interface-curses-forms-field_types__adb.htm#126_7">Low_Level</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#126_10">Freearg</A> /= <b>null</b> <b>then</b>
               <A HREF="terminal_interface-curses-forms-field_types__adb.htm#126_7">Low_Level</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#126_10">Freearg</A> (<A HREF="terminal_interface-curses-forms-field_types__adb.htm#125_7">To_Be_Free</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#213_7">Usr</A>);
            <b>end</b> <b>if</b>;
         <b>end</b> <b>if</b>;
         <b>if</b> <A HREF="terminal_interface-curses-forms-field_types__adb.htm#125_7">To_Be_Free</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#212_7">Typ</A> /= <b>null</b> <b>then</b>
            <A HREF="terminal_interface-curses-forms-field_types__adb.htm#120_17">Free_Type</A> (<A HREF="terminal_interface-curses-forms-field_types__adb.htm#125_7">To_Be_Free</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#212_7">Typ</A>);
         <b>end</b> <b>if</b>;
         <A HREF="terminal_interface-curses-forms-field_types__adb.htm#122_17">Freeargs</A> (<A HREF="terminal_interface-curses-forms-field_types__adb.htm#125_7">To_Be_Free</A>);
      <b>end</b> <b>if</b>;
   <b>end</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#172_14">Free_Arg</A><A HREF="terminal_interface-curses-forms-field_types__ads.htm#172_14">;</A>


   <b>procedure</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#151_14">Wrap_Builtin</A><FONT COLOR=red><A NAME="143_14"></A></FONT> (<A HREF="terminal_interface-curses-forms-field_types__ads.htm#151_28">Fld</A> : <A HREF="terminal_interface-curses-forms__ads.htm#55_9">Field</A>;
                           Typ : <A HREF="terminal_interface-curses-forms-field_types__ads.htm#52_9">Field_Type</A>'Class;
                           <A HREF="terminal_interface-curses-forms-field_types__ads.htm#153_28">Cft</A> : <A HREF="terminal_interface-curses-forms-field_types__ads.htm#132_9">C_Field_Type</A> := <A HREF="terminal_interface-curses-forms-field_types__ads.htm#148_13">C_Builtin_Router</A>)
   <b>is</b>
      <FONT COLOR=red><A NAME="147_7">Usr_Arg</A></FONT>   : System.Address := <A HREF="terminal_interface-curses-forms-field_types__adb.htm#61_13">Get_Arg</A> (<A HREF="terminal_interface-curses-forms-field_types__ads.htm#151_28">Fld</A>);
      <FONT COLOR=red><A NAME="148_7">Low_Level</A></FONT> : <b>constant</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#132_9">C_Field_Type</A> := <A HREF="terminal_interface-curses-forms-field_types__adb.htm#58_13">Get_Fieldtype</A> (<A HREF="terminal_interface-curses-forms-field_types__ads.htm#151_28">Fld</A>);
      <FONT COLOR=red><A NAME="149_7">Arg</A></FONT> : <A HREF="terminal_interface-curses-forms-field_types__ads.htm#216_9">Argument_Access</A>;
      <FONT COLOR=red><A NAME="150_7">Res</A></FONT> : <A HREF="terminal_interface-curses-aux__ads.htm#78_12">Eti_Error</A>;
      <b>function</b> <FONT COLOR=red><A NAME="151_16">Set_Fld_Type</A></FONT> (<FONT COLOR=red><A NAME="151_30">F</A></FONT>    : <A HREF="terminal_interface-curses-forms__ads.htm#55_9">Field</A> := <A HREF="terminal_interface-curses-forms-field_types__ads.htm#151_28">Fld</A>;
                             <FONT COLOR=red><A NAME="152_30">Cf</A></FONT>   : <A HREF="terminal_interface-curses-forms-field_types__ads.htm#132_9">C_Field_Type</A> := <A HREF="terminal_interface-curses-forms-field_types__ads.htm#153_28">Cft</A>;
                             <FONT COLOR=red><A NAME="153_30">Arg1</A></FONT> : <A HREF="terminal_interface-curses-forms-field_types__ads.htm#216_9">Argument_Access</A>) <b>return</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#46_12">C_Int</A>;
      <b>pragma</b> Import (C, <A HREF="terminal_interface-curses-forms-field_types__adb.htm#151_16">Set_Fld_Type</A>, "set_field_type");

   <b>begin</b>
      <b>pragma</b> Assert (<A HREF="terminal_interface-curses-forms-field_types__adb.htm#148_7">Low_Level</A> /= <A HREF="terminal_interface-curses-forms-field_types__ads.htm#134_4">Null_Field_Type</A>);
      <b>if</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#153_28">Cft</A> /= <A HREF="terminal_interface-curses-forms-field_types__ads.htm#148_13">C_Builtin_Router</A> <b>and</b> <b>then</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#153_28">Cft</A> /= <A HREF="terminal_interface-curses-forms-field_types__ads.htm#149_13">C_Choice_Router</A> <b>then</b>
         <b>raise</b> <A HREF="terminal_interface-curses-forms__ads.htm#288_4">Form_Exception</A>;
      <b>else</b>
         <A HREF="terminal_interface-curses-forms-field_types__adb.htm#149_7">Arg</A> := <b>new</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#211_9">Argument</A>'(Usr =&gt; System.Null_Address,
                              Typ =&gt; <b>new</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#52_9">Field_Type</A>'Class'(Typ),
                              Cft =&gt; <A HREF="terminal_interface-curses-forms-field_types__adb.htm#58_13">Get_Fieldtype</A> (<A HREF="terminal_interface-curses-forms-field_types__ads.htm#151_28">Fld</A>));
         <b>if</b> <A HREF="terminal_interface-curses-forms-field_types__adb.htm#147_7">Usr_Arg</A> /= System.Null_Address <b>then</b>
            <b>if</b> <A HREF="terminal_interface-curses-forms-field_types__adb.htm#148_7">Low_Level</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#125_10">Copyarg</A> /= <b>null</b> <b>then</b>
               <A HREF="terminal_interface-curses-forms-field_types__adb.htm#149_7">Arg</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#213_7">Usr</A> := <A HREF="terminal_interface-curses-forms-field_types__adb.htm#148_7">Low_Level</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#125_10">Copyarg</A> (<A HREF="terminal_interface-curses-forms-field_types__adb.htm#147_7">Usr_Arg</A>);
            <b>else</b>
               <A HREF="terminal_interface-curses-forms-field_types__adb.htm#149_7">Arg</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#213_7">Usr</A> := <A HREF="terminal_interface-curses-forms-field_types__adb.htm#147_7">Usr_Arg</A>;
            <b>end</b> <b>if</b>;
         <b>end</b> <b>if</b>;

         <A HREF="terminal_interface-curses-forms-field_types__adb.htm#150_7">Res</A> := <A HREF="terminal_interface-curses-forms-field_types__adb.htm#151_16">Set_Fld_Type</A> (<A HREF="terminal_interface-curses-forms-field_types__adb.htm#153_30">Arg1</A> =&gt; <A HREF="terminal_interface-curses-forms-field_types__adb.htm#149_7">Arg</A>);
         <b>if</b> <A HREF="terminal_interface-curses-forms-field_types__adb.htm#150_7">Res</A> /= <A HREF="terminal_interface-curses-aux__ads.htm#80_4">E_Ok</A> <b>then</b>
            <A HREF="terminal_interface-curses-aux__ads.htm#96_14">Eti_Exception</A> (<A HREF="terminal_interface-curses-forms-field_types__adb.htm#150_7">Res</A>);
         <b>end</b> <b>if</b>;
      <b>end</b> <b>if</b>;
   <b>end</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#151_14">Wrap_Builtin</A><A HREF="terminal_interface-curses-forms-field_types__ads.htm#151_14">;</A>

   <b>function</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#177_13">Field_Check_Router</A> (<A HREF="terminal_interface-curses-forms-field_types__ads.htm#177_33">Fld</A> : <A HREF="terminal_interface-curses-forms__ads.htm#55_9">Field</A>;
                                <A HREF="terminal_interface-curses-forms-field_types__ads.htm#178_33">Usr</A> : System.Address) <b>return</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#46_12">C_Int</A>
   <b>is</b>
      <FONT COLOR=red><A NAME="182_7">Arg</A></FONT>  : <b>constant</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#216_9">Argument_Access</A> := <A HREF="terminal_interface-curses-forms-field_types__adb.htm#55_13">To_Argument_Access</A> (<A HREF="terminal_interface-curses-forms-field_types__ads.htm#178_33">Usr</A>);
   <b>begin</b>
      <b>pragma</b> Assert (<A HREF="terminal_interface-curses-forms-field_types__adb.htm#182_7">Arg</A> /= <b>null</b> <b>and</b> <b>then</b> <A HREF="terminal_interface-curses-forms-field_types__adb.htm#182_7">Arg</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#214_7">Cft</A> /= <A HREF="terminal_interface-curses-forms-field_types__ads.htm#134_4">Null_Field_Type</A>
                     <b>and</b> <b>then</b> <A HREF="terminal_interface-curses-forms-field_types__adb.htm#182_7">Arg</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#212_7">Typ</A> /= <b>null</b>);
      <b>if</b> <A HREF="terminal_interface-curses-forms-field_types__adb.htm#182_7">Arg</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#214_7">Cft</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#127_10">Fcheck</A> /= <b>null</b> <b>then</b>
         <b>return</b> <A HREF="terminal_interface-curses-forms-field_types__adb.htm#182_7">Arg</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#214_7">Cft</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#127_10">Fcheck</A> (<A HREF="terminal_interface-curses-forms-field_types__ads.htm#177_33">Fld</A>, <A HREF="terminal_interface-curses-forms-field_types__adb.htm#182_7">Arg</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#213_7">Usr</A>);
      <b>else</b>
         <b>return</b> 1;
      <b>end</b> <b>if</b>;
   <b>end</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#177_13">Field_Check_Router</A><A HREF="terminal_interface-curses-forms-field_types__ads.htm#177_13">;</A>

   <b>function</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#185_13">Char_Check_Router</A> (<A HREF="terminal_interface-curses-forms-field_types__ads.htm#185_32">Ch</A>  : <A HREF="terminal_interface-curses-forms-field_types__ads.htm#46_12">C_Int</A>;
                               <A HREF="terminal_interface-curses-forms-field_types__ads.htm#186_32">Usr</A> : System.Address) <b>return</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#46_12">C_Int</A>
   <b>is</b>
      <FONT COLOR=red><A NAME="196_7">Arg</A></FONT>  : <b>constant</b> <A HREF="terminal_interface-curses-forms-field_types__ads.htm#216_9">Argument_Access</A> := <A HREF="terminal_interface-curses-forms-field_types__adb.htm#55_13">To_Argument_Access</A> (<A HREF="terminal_interface-curses-forms-field_types__ads.htm#186_32">Usr</A>);
   <b>begin</b>
      <b>pragma</b> Assert (<A HREF="terminal_interface-curses-forms-field_types__adb.htm#196_7">Arg</A> /= <b>null</b> <b>and</b> <b>then</b> <A HREF="terminal_interface-curses-forms-field_types__adb.htm#196_7">Arg</A>.<A HREF="terminal_interface-curses-forms-field_types__ads.htm#214_7">Cft</A> /= <A HREF="terminal_interface-curses-forms-field_types__ads.htm#134_4">Null_Field_Type</A>