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------------------------------------------------------------------------------

--                                                                          --

--                        GNAT RUN-TIME COMPONENTS                          --

--                                                                          --

--                          S Y S T E M . C R T L                           --

--                                                                          --

--                                 S p e c                                  --

--                                                                          --

--          Copyright (C) 2003-2009, Free Software Foundation, Inc.         --

--                                                                          --

-- GNAT is free software;  you can  redistribute it  and/or modify it under --

-- terms of the  GNU General Public License as published  by the Free Soft- --

-- ware  Foundation;  either version 3,  or (at your option) any later ver- --

-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --

-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --

-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --

--                                                                          --

-- As a special exception under Section 7 of GPL version 3, you are granted --

-- additional permissions described in the GCC Runtime Library Exception,   --

-- version 3.1, as published by the Free Software Foundation.               --

--                                                                          --

-- You should have received a copy of the GNU General Public License and    --

-- a copy of the GCC Runtime Library Exception along with this program;     --

-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --

-- <http://www.gnu.org/licenses/>.                                          --

--                                                                          --

-- GNAT was originally developed  by the GNAT team at  New York University. --

-- Extensive contributions were provided by Ada Core Technologies Inc.      --

--                                                                          --

------------------------------------------------------------------------------

--  This package provides the low level interface to the C runtime library

pragma Compiler_Unit;

with System.Parameters;

package System.CRTL is

   pragma Preelaborate;

   subtype chars is System.Address;

   --  Pointer to null-terminated array of characters

   --  Should use Interfaces.C.Strings types instead, but this causes bootstrap

   --  issues as i-c contains Ada 2005 specific features, not compatible with

   --  older, Ada 95-only base compilers???

   subtype DIRs is System.Address;

   --  Corresponds to the C type DIR*

   subtype FILEs is System.Address;

   --  Corresponds to the C type FILE*

   subtype int is Integer;

   type long is range -(2 ** (System.Parameters.long_bits - 1))

                   .. +(2 ** (System.Parameters.long_bits - 1)) - 1;

   subtype off_t is Long_Integer;

   type size_t is mod 2 ** Standard'Address_Size;

   type Filename_Encoding is (UTF8, ASCII_8bits, Unspecified);

   for Filename_Encoding use (UTF8 => 0, ASCII_8bits => 1, Unspecified => 2);

   pragma Convention (C, Filename_Encoding);

   --  Describes the filename's encoding

   function atoi (A : System.Address) return Integer;

   pragma Import (C, atoi, "atoi");

   procedure clearerr (stream : FILEs);

   pragma Import (C, clearerr, "clearerr");

   function dup  (handle : int) return int;

   pragma Import (C, dup, "dup");

   function dup2 (from, to : int) return int;

   pragma Import (C, dup2, "dup2");

   function fclose (stream : FILEs) return int;

   pragma Import (C, fclose, "fclose");

   function fdopen (handle : int; mode : chars) return FILEs;

   pragma Import (C, fdopen, "fdopen");

   function fflush (stream : FILEs) return int;

   pragma Import (C, fflush, "fflush");

   function fgetc (stream : FILEs) return int;

   pragma Import (C, fgetc, "fgetc");

   function fgets (strng : chars; n : int; stream : FILEs) return chars;

   pragma Import (C, fgets, "fgets");

   function fopen

     (filename : chars;

      mode     : chars;

      encoding : Filename_Encoding := Unspecified) return FILEs;

   pragma Import (C, fopen, "__gnat_fopen");

   function fputc (C : int; stream : FILEs) return int;

   pragma Import (C, fputc, "fputc");

   function fputs (Strng : chars; Stream : FILEs) return int;

   pragma Import (C, fputs, "fputs");

   procedure free (Ptr : System.Address);

   pragma Import (C, free, "free");

   function freopen

     (filename : chars;

      mode     : chars;

      stream   : FILEs;

      encoding : Filename_Encoding := Unspecified) return FILEs;

   pragma Import (C, freopen, "__gnat_freopen");

   function fseek

     (stream : FILEs;

      offset : long;

      origin : int) return int;

   pragma Import (C, fseek, "fseek");

   function ftell (stream : FILEs) return long;

   pragma Import (C, ftell, "ftell");

   function getenv (S : String) return System.Address;

   pragma Import (C, getenv, "getenv");

   function isatty (handle : int) return int;

   pragma Import (C, isatty, "isatty");

   function lseek (fd : int; offset : off_t; direction : int) return off_t;

   pragma Import (C, lseek, "lseek");

   function malloc (Size : size_t) return System.Address;

   pragma Import (C, malloc, "malloc");

   procedure memcpy (S1 : System.Address; S2 : System.Address; N : size_t);

   pragma Import (C, memcpy, "memcpy");

   procedure memmove (S1 : System.Address; S2 : System.Address; N : size_t);

   pragma Import (C, memmove, "memmove");

   procedure mktemp (template : chars);

   pragma Import (C, mktemp, "mktemp");

   function pclose (stream : System.Address) return int;

   pragma Import (C, pclose, "pclose");

   function popen (command, mode : System.Address) return System.Address;

   pragma Import (C, popen, "popen");

   function realloc

     (Ptr : System.Address; Size : size_t) return System.Address;

   pragma Import (C, realloc, "realloc");

   procedure rewind (stream : FILEs);

   pragma Import (C, rewind, "rewind");

   function rmdir (dir_name : String) return int;

   pragma Import (C, rmdir, "__gnat_rmdir");

   function chdir (dir_name : String) return int;

   pragma Import (C, chdir, "__gnat_chdir");

   function setvbuf

     (stream : FILEs;

      buffer : chars;

      mode   : int;

      size   : size_t) return int;

   pragma Import (C, setvbuf, "setvbuf");

   procedure tmpnam (string : chars);

   pragma Import (C, tmpnam, "tmpnam");

   function tmpfile return FILEs;

   pragma Import (C, tmpfile, "tmpfile");

   function ungetc (c : int; stream : FILEs) return int;

   pragma Import (C, ungetc, "ungetc");

   function unlink (filename : chars) return int;

   pragma Import (C, unlink, "__gnat_unlink");

   function open (filename : chars; oflag : int) return int;

   pragma Import (C, open, "open");

   function close (fd : int) return int;

   pragma Import (C, close, "close");

   function read (fd : int; buffer : chars; nbytes : int) return int;

   pragma Import (C, read, "read");

   function write (fd : int; buffer : chars; nbytes : int) return int;

   pragma Import (C, write, "write");

end System.CRTL;