http://invisible-island.net/ncurses/Ada95



File : terminal_interface-curses-trace.adb


------------------------------------------------------------------------------
--                                                                          --
--                           GNAT ncurses Binding                           --
--                                                                          --
--                      Terminal_Interface.Curses.Trace                     --
--                                                                          --
--                                 B O D Y                                  --
--                                                                          --
------------------------------------------------------------------------------
-- Copyright (c) 2000-2004,2009 Free Software Foundation, Inc.              --
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-- copy of this software and associated documentation files (the            --
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-- copies of the Software, and to permit persons to whom the Software is    --
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-- OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF               --
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------------------------------------------------------------------------------
--  Author:  Juergen Pfeifer, 1996
--  Version Control:
--  @Revision: 1.7 @
--  Binding Version 01.00
------------------------------------------------------------------------------
with Interfaces.C; use Interfaces.C;
with Terminal_Interface.Curses.Aux; use Terminal_Interface.Curses.Aux;
with Ada.Unchecked_Conversion;

package body Terminal_Interface.Curses.Trace is

   type C_TraceType is new C_UInt;

   function TraceAda_To_TraceC is new
     Ada.Unchecked_Conversion (Source => Trace_Attribute_Set,
                               Target => C_TraceType);

   procedure Trace_On (x : Trace_Attribute_Set) is
      procedure traceC (y : C_TraceType);
      pragma Import (C, traceC, "trace");
   begin
      traceC (TraceAda_To_TraceC (x));
   end Trace_On;

   --  75. (12) A C function that takes a variable number of arguments can
   --      correspond to several Ada subprograms, taking various specific
   --      numbers and types of parameters.

   procedure Trace_Put (str : String) is
      procedure tracef (format : char_array; s : char_array);
      pragma Import (C, tracef, "_traces");
      Txt    : char_array (0 .. str'Length);
      Length : size_t;
      formatstr : constant String := "%s" &  ASCII.NUL;
      formattxt : char_array (0 .. formatstr'Length);
   begin
      To_C (formatstr, formattxt, Length);
      To_C (str, Txt, Length);
      tracef (formattxt, Txt);
   end Trace_Put;

end Terminal_Interface.Curses.Trace;