242 lines
8.9 KiB
Ada
242 lines
8.9 KiB
Ada
------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- S Y S T E M . C R T L --
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-- --
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-- S p e c --
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-- --
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-- Copyright (C) 2003-2014, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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-- This package provides the low level interface to the C runtime library
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pragma Compiler_Unit_Warning;
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with System.Parameters;
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package System.CRTL is
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pragma Preelaborate;
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subtype chars is System.Address;
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-- Pointer to null-terminated array of characters
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-- Should use Interfaces.C.Strings types instead, but this causes bootstrap
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-- issues as i-c contains Ada 2005 specific features, not compatible with
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-- older, Ada 95-only base compilers???
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subtype DIRs is System.Address;
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-- Corresponds to the C type DIR*
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subtype FILEs is System.Address;
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-- Corresponds to the C type FILE*
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subtype int is Integer;
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type long is range -(2 ** (System.Parameters.long_bits - 1))
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.. +(2 ** (System.Parameters.long_bits - 1)) - 1;
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subtype off_t is Long_Integer;
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type size_t is mod 2 ** Standard'Address_Size;
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type ssize_t is range -(2 ** (Standard'Address_Size - 1))
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.. +(2 ** (Standard'Address_Size - 1)) - 1;
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type int64 is new Long_Long_Integer;
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-- Note: we use Long_Long_Integer'First instead of -2 ** 63 to allow this
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-- unit to compile when using custom target configuration files where the
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-- maximum integer is 32 bits. This is useful for static analysis tools
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-- such as SPARK or CodePeer. In the normal case, Long_Long_Integer is
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-- always 64-bits so there is no difference.
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type Filename_Encoding is (UTF8, ASCII_8bits, Unspecified);
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for Filename_Encoding use (UTF8 => 0, ASCII_8bits => 1, Unspecified => 2);
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pragma Convention (C, Filename_Encoding);
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-- Describes the filename's encoding
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--------------------
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-- GCC intrinsics --
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--------------------
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-- The following functions are imported with convention Intrinsic so that
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-- we take advantage of back-end builtins if present (else we fall back
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-- to C library functions by the same names).
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function strlen (A : System.Address) return size_t;
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pragma Import (Intrinsic, strlen, "strlen");
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procedure strncpy (dest, src : System.Address; n : size_t);
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pragma Import (Intrinsic, strncpy, "strncpy");
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-------------------------------
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-- Other C runtime functions --
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-------------------------------
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function atoi (A : System.Address) return Integer;
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pragma Import (C, atoi, "atoi");
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procedure clearerr (stream : FILEs);
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pragma Import (C, clearerr, "clearerr");
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function dup (handle : int) return int;
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pragma Import (C, dup, "dup");
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function dup2 (from, to : int) return int;
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pragma Import (C, dup2, "dup2");
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function fclose (stream : FILEs) return int;
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pragma Import (C, fclose, "fclose");
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function fdopen (handle : int; mode : chars) return FILEs;
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pragma Import (C, fdopen, "fdopen");
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function fflush (stream : FILEs) return int;
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pragma Import (C, fflush, "fflush");
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function fgetc (stream : FILEs) return int;
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pragma Import (C, fgetc, "fgetc");
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function fgets (strng : chars; n : int; stream : FILEs) return chars;
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pragma Import (C, fgets, "fgets");
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function fopen
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(filename : chars;
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mode : chars;
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encoding : Filename_Encoding := Unspecified) return FILEs;
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pragma Import (C, fopen, "__gnat_fopen");
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function fputc (C : int; stream : FILEs) return int;
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pragma Import (C, fputc, "fputc");
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function fputwc (C : int; stream : FILEs) return int;
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pragma Import (C, fputwc, "__gnat_fputwc");
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function fputs (Strng : chars; Stream : FILEs) return int;
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pragma Import (C, fputs, "fputs");
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procedure free (Ptr : System.Address);
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pragma Import (C, free, "free");
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function freopen
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(filename : chars;
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mode : chars;
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stream : FILEs;
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encoding : Filename_Encoding := Unspecified) return FILEs;
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pragma Import (C, freopen, "__gnat_freopen");
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function fseek
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(stream : FILEs;
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offset : long;
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origin : int) return int;
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pragma Import (C, fseek, "fseek");
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function fseek64
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(stream : FILEs;
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offset : int64;
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origin : int) return int;
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pragma Import (C, fseek64, "__gnat_fseek64");
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function ftell (stream : FILEs) return long;
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pragma Import (C, ftell, "ftell");
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function ftell64 (stream : FILEs) return int64;
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pragma Import (C, ftell64, "__gnat_ftell64");
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function getenv (S : String) return System.Address;
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pragma Import (C, getenv, "getenv");
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function isatty (handle : int) return int;
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pragma Import (C, isatty, "isatty");
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function lseek (fd : int; offset : off_t; direction : int) return off_t;
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pragma Import (C, lseek, "lseek");
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function malloc (Size : size_t) return System.Address;
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pragma Import (C, malloc, "malloc");
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procedure memcpy (S1 : System.Address; S2 : System.Address; N : size_t);
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pragma Import (C, memcpy, "memcpy");
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procedure memmove (S1 : System.Address; S2 : System.Address; N : size_t);
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pragma Import (C, memmove, "memmove");
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procedure mktemp (template : chars);
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pragma Import (C, mktemp, "mktemp");
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function pclose (stream : System.Address) return int;
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pragma Import (C, pclose, "pclose");
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function popen (command, mode : System.Address) return System.Address;
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pragma Import (C, popen, "popen");
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function realloc
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(Ptr : System.Address; Size : size_t) return System.Address;
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pragma Import (C, realloc, "realloc");
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procedure rewind (stream : FILEs);
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pragma Import (C, rewind, "rewind");
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function rmdir (dir_name : String) return int;
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pragma Import (C, rmdir, "__gnat_rmdir");
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function chdir (dir_name : String) return int;
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pragma Import (C, chdir, "__gnat_chdir");
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function mkdir
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(dir_name : String;
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encoding : Filename_Encoding := Unspecified) return int;
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pragma Import (C, mkdir, "__gnat_mkdir");
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function setvbuf
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(stream : FILEs;
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buffer : chars;
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mode : int;
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size : size_t) return int;
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pragma Import (C, setvbuf, "setvbuf");
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procedure tmpnam (str : chars);
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pragma Import (C, tmpnam, "tmpnam");
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function tmpfile return FILEs;
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pragma Import (C, tmpfile, "tmpfile");
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function ungetc (c : int; stream : FILEs) return int;
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pragma Import (C, ungetc, "ungetc");
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function unlink (filename : chars) return int;
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pragma Import (C, unlink, "__gnat_unlink");
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function open (filename : chars; oflag : int) return int;
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pragma Import (C, open, "__gnat_open");
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function close (fd : int) return int;
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pragma Import (C, close, "close");
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function read (fd : int; buffer : chars; count : size_t) return ssize_t;
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pragma Import (C, read, "read");
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function write (fd : int; buffer : chars; count : size_t) return ssize_t;
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pragma Import (C, write, "write");
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end System.CRTL;
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