gcc/ada/s-crtl.ads

   1 ------------------------------------------------------------------------------
   2 --                                                                          --
   3 --                        GNAT RUN-TIME COMPONENTS                          --
   4 --                                                                          --
   5 --                          S Y S T E M . C R T L                           --
   6 --                                                                          --
   7 --                                 S p e c                                  --
   8 --                                                                          --
   9 --          Copyright (C) 2003-2014, Free Software Foundation, Inc.         --
  10 --                                                                          --
  11 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
  12 -- terms of the  GNU General Public License as published  by the Free Soft- --
  13 -- ware  Foundation;  either version 3,  or (at your option) any later ver- --
  14 -- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
  15 -- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
  16 -- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
  17 --                                                                          --
  18 -- As a special exception under Section 7 of GPL version 3, you are granted --
  19 -- additional permissions described in the GCC Runtime Library Exception,   --
  20 -- version 3.1, as published by the Free Software Foundation.               --
  21 --                                                                          --
  22 -- You should have received a copy of the GNU General Public License and    --
  23 -- a copy of the GCC Runtime Library Exception along with this program;     --
  24 -- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
  25 -- <http://www.gnu.org/licenses/>.                                          --
  26 --                                                                          --
  27 -- GNAT was originally developed  by the GNAT team at  New York University. --
  28 -- Extensive contributions were provided by Ada Core Technologies Inc.      --
  29 --                                                                          --
  30 ------------------------------------------------------------------------------
  31
  32 --  This package provides the low level interface to the C runtime library
  33
  34 pragma Compiler_Unit_Warning;
  35
  36 with System.Parameters;
  37
  38 package System.CRTL is
  39    pragma Preelaborate;
  40
  41    subtype chars is System.Address;
  42    --  Pointer to null-terminated array of characters
  43    --  Should use Interfaces.C.Strings types instead, but this causes bootstrap
  44    --  issues as i-c contains Ada 2005 specific features, not compatible with
  45    --  older, Ada 95-only base compilers???
  46
  47    subtype DIRs is System.Address;
  48    --  Corresponds to the C type DIR*
  49
  50    subtype FILEs is System.Address;
  51    --  Corresponds to the C type FILE*
  52
  53    subtype int is Integer;
  54
  55    type long is range -(2 ** (System.Parameters.long_bits - 1))
  56                    .. +(2 ** (System.Parameters.long_bits - 1)) - 1;
  57
  58    subtype off_t is Long_Integer;
  59
  60    type size_t is mod 2 ** Standard'Address_Size;
  61
  62    type ssize_t is range -(2 ** (Standard'Address_Size - 1))
  63                       .. +(2 ** (Standard'Address_Size - 1)) - 1;
  64
  65    type int64 is range -(2 ** 63) .. (2 ** 63) - 1;
  66
  67    type Filename_Encoding is (UTF8, ASCII_8bits, Unspecified);
  68    for Filename_Encoding use (UTF8 => 0, ASCII_8bits => 1, Unspecified => 2);
  69    pragma Convention (C, Filename_Encoding);
  70    --  Describes the filename's encoding
  71
  72    --------------------
  73    -- GCC intrinsics --
  74    --------------------
  75
  76    --  The following functions are imported with convention Intrinsic so that
  77    --  we take advantage of back-end builtins if present (else we fall back
  78    --  to C library functions by the same names).
  79
  80    function strlen (A : System.Address) return size_t;
  81    pragma Import (Intrinsic, strlen, "strlen");
  82
  83    procedure strncpy (dest, src : System.Address; n : size_t);
  84    pragma Import (Intrinsic, strncpy, "strncpy");
  85
  86    -------------------------------
  87    -- Other C runtime functions --
  88    -------------------------------
  89
  90    function atoi (A : System.Address) return Integer;
  91    pragma Import (C, atoi, "atoi");
  92
  93    procedure clearerr (stream : FILEs);
  94    pragma Import (C, clearerr, "clearerr");
  95
  96    function dup  (handle : int) return int;
  97    pragma Import (C, dup, "dup");
  98
  99    function dup2 (from, to : int) return int;
 100    pragma Import (C, dup2, "dup2");
 101
 102    function fclose (stream : FILEs) return int;
 103    pragma Import (C, fclose, "fclose");
 104
 105    function fdopen (handle : int; mode : chars) return FILEs;
 106    pragma Import (C, fdopen, "fdopen");
 107
 108    function fflush (stream : FILEs) return int;
 109    pragma Import (C, fflush, "fflush");
 110
 111    function fgetc (stream : FILEs) return int;
 112    pragma Import (C, fgetc, "fgetc");
 113
 114    function fgets (strng : chars; n : int; stream : FILEs) return chars;
 115    pragma Import (C, fgets, "fgets");
 116
 117    function fopen
 118      (filename : chars;
 119       mode     : chars;
 120       encoding : Filename_Encoding := Unspecified) return FILEs;
 121    pragma Import (C, fopen, "__gnat_fopen");
 122
 123    function fputc (C : int; stream : FILEs) return int;
 124    pragma Import (C, fputc, "fputc");
 125
 126    function fputwc (C : int; stream : FILEs) return int;
 127    pragma Import (C, fputwc, "__gnat_fputwc");
 128
 129    function fputs (Strng : chars; Stream : FILEs) return int;
 130    pragma Import (C, fputs, "fputs");
 131
 132    procedure free (Ptr : System.Address);
 133    pragma Import (C, free, "free");
 134
 135    function freopen
 136      (filename : chars;
 137       mode     : chars;
 138       stream   : FILEs;
 139       encoding : Filename_Encoding := Unspecified) return FILEs;
 140    pragma Import (C, freopen, "__gnat_freopen");
 141
 142    function fseek
 143      (stream : FILEs;
 144       offset : long;
 145       origin : int) return int;
 146    pragma Import (C, fseek, "fseek");
 147
 148    function fseek64
 149      (stream : FILEs;
 150       offset : int64;
 151       origin : int) return int;
 152    pragma Import (C, fseek64, "__gnat_fseek64");
 153
 154    function ftell (stream : FILEs) return long;
 155    pragma Import (C, ftell, "ftell");
 156
 157    function ftell64 (stream : FILEs) return int64;
 158    pragma Import (C, ftell64, "__gnat_ftell64");
 159
 160    function getenv (S : String) return System.Address;
 161    pragma Import (C, getenv, "getenv");
 162
 163    function isatty (handle : int) return int;
 164    pragma Import (C, isatty, "isatty");
 165
 166    function lseek (fd : int; offset : off_t; direction : int) return off_t;
 167    pragma Import (C, lseek, "lseek");
 168
 169    function malloc (Size : size_t) return System.Address;
 170    pragma Import (C, malloc, "malloc");
 171
 172    procedure memcpy (S1 : System.Address; S2 : System.Address; N : size_t);
 173    pragma Import (C, memcpy, "memcpy");
 174
 175    procedure memmove (S1 : System.Address; S2 : System.Address; N : size_t);
 176    pragma Import (C, memmove, "memmove");
 177
 178    procedure mktemp (template : chars);
 179    pragma Import (C, mktemp, "mktemp");
 180
 181    function pclose (stream : System.Address) return int;
 182    pragma Import (C, pclose, "pclose");
 183
 184    function popen (command, mode : System.Address) return System.Address;
 185    pragma Import (C, popen, "popen");
 186
 187    function realloc
 188      (Ptr : System.Address; Size : size_t) return System.Address;
 189    pragma Import (C, realloc, "realloc");
 190
 191    procedure rewind (stream : FILEs);
 192    pragma Import (C, rewind, "rewind");
 193
 194    function rmdir (dir_name : String) return int;
 195    pragma Import (C, rmdir, "__gnat_rmdir");
 196
 197    function chdir (dir_name : String) return int;
 198    pragma Import (C, chdir, "__gnat_chdir");
 199
 200    function mkdir
 201      (dir_name : String;
 202       encoding : Filename_Encoding := Unspecified) return int;
 203    pragma Import (C, mkdir, "__gnat_mkdir");
 204
 205    function setvbuf
 206      (stream : FILEs;
 207       buffer : chars;
 208       mode   : int;
 209       size   : size_t) return int;
 210    pragma Import (C, setvbuf, "setvbuf");
 211
 212    procedure tmpnam (str : chars);
 213    pragma Import (C, tmpnam, "tmpnam");
 214
 215    function tmpfile return FILEs;
 216    pragma Import (C, tmpfile, "tmpfile");
 217
 218    function ungetc (c : int; stream : FILEs) return int;
 219    pragma Import (C, ungetc, "ungetc");
 220
 221    function unlink (filename : chars) return int;
 222    pragma Import (C, unlink, "__gnat_unlink");
 223
 224    function open (filename : chars; oflag : int) return int;
 225    pragma Import (C, open, "__gnat_open");
 226
 227    function close (fd : int) return int;
 228    pragma Import (C, close, "close");
 229
 230    function read (fd : int; buffer : chars; count : size_t) return ssize_t;
 231    pragma Import (C, read, "read");
 232
 233    function write (fd : int; buffer : chars; count : size_t) return ssize_t;
 234    pragma Import (C, write, "write");
 235
 236 end System.CRTL;