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------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . C R T L --
-- --
-- S p e c --
-- --
-- Copyright (C) 2003-2024, 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
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 System.Memory_Size;
type ssize_t is range -Memory_Size / 2 .. Memory_Size / 2 - 1;
type int64 is new Long_Long_Integer;
-- Note: we use Long_Long_Integer'First instead of -2 ** 63 to allow this
-- unit to compile when using custom target configuration files where the
-- maximum integer is 32 bits. This is useful for static analysis tools
-- such as SPARK or CodePeer. In the normal case, Long_Long_Integer is
-- always 64-bits so there is no difference.
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
--------------------
-- GCC intrinsics --
--------------------
-- The following functions are imported with convention Intrinsic so that
-- we take advantage of back-end builtins if present (else we fall back
-- to C library functions by the same names).
function strlen (A : System.Address) return size_t;
pragma Import (Intrinsic, strlen, "strlen");
procedure strncpy (dest, src : System.Address; n : size_t);
pragma Import (Intrinsic, strncpy, "strncpy");
-------------------------------
-- Other C runtime functions --
-------------------------------
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 fputwc (C : int; stream : FILEs) return int;
pragma Import (C, fputwc, "__gnat_fputwc");
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 fseek64
(stream : FILEs;
offset : int64;
origin : int) return int;
pragma Import (C, fseek64, "__gnat_fseek64");
function ftell (stream : FILEs) return long;
pragma Import (C, ftell, "ftell");
function ftell64 (stream : FILEs) return int64;
pragma Import (C, ftell64, "__gnat_ftell64");
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 mkdir
(dir_name : String;
encoding : Filename_Encoding := Unspecified) return int;
pragma Import (C, mkdir, "__gnat_mkdir");
function setvbuf
(stream : FILEs;
buffer : chars;
mode : int;
size : size_t) return int;
pragma Import (C, setvbuf, "setvbuf");
procedure tmpnam (str : 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;
encoding : Filename_Encoding := Unspecified) return int;
pragma Import (C, unlink, "__gnat_unlink");
function open (filename : chars; oflag : int) return int;
pragma Import (C, open, "__gnat_open");
function close (fd : int) return int;
pragma Import (C, close, "close");
function read (fd : int; buffer : chars; count : size_t) return ssize_t;
pragma Import (C, read, "read");
function write (fd : int; buffer : chars; count : size_t) return ssize_t;
pragma Import (C, write, "write");
end System.CRTL;
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