File : s-memset.adb
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT RUN-TIME COMPONENTS --
4 -- --
5 -- S Y S T E M . M E M O R Y _ S E T --
6 -- --
7 -- B o d y --
8 -- --
9 -- Copyright (C) 2006-2014, 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 -- --
19 -- --
20 -- --
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 with Ada.Unchecked_Conversion;
32 with System; use System;
33 with Interfaces.C; use Interfaces.C;
34
35 package body System.Memory_Set is
36
37 subtype Mem_Array is char_array (size_t);
38 type Mem_Ptr is access Mem_Array;
39
40 function To_Memptr is new Ada.Unchecked_Conversion (Address, Mem_Ptr);
41
42 ------------
43 -- memset --
44 ------------
45
46 function Memset (M : Address; C : int; Size : size_t) return Address is
47 Dest : constant Mem_Ptr := To_Memptr (M);
48
49 begin
50 if Size > 0 then
51 for J in 0 .. Size - 1 loop
52 Dest (J) := char'Val (C);
53 end loop;
54 end if;
55
56 return M;
57 end Memset;
58
59 end System.Memory_Set;