1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT RUN-TIME COMPONENTS                         --
4--                                                                          --
5--          S Y S T E M . S T R E A M _ A T T R I B U T E S . X D R         --
6--                                                                          --
7--                                 S p e c                                  --
8--                                                                          --
9--          Copyright (C) 1992-2021, 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 contains alternate implementations of the stream attributes
33--  for elementary types based on the XDR standard. These are the subprograms
34--  that are directly accessed by occurrences of the stream attributes where
35--  the type is elementary.
36
37--  It is especially useful for exchanging streams between two different
38--  systems with different basic type representations and endianness.
39
40--  We only provide the subprograms for the standard base types. For user
41--  defined types, the subprogram for the corresponding root type is called
42--  with an appropriate conversion.
43
44package System.Stream_Attributes.XDR is
45   pragma Preelaborate;
46
47   pragma Suppress (Accessibility_Check, XDR);
48   --  No need to check accessibility on arguments of subprograms
49
50   ---------------------
51   -- Input Functions --
52   ---------------------
53
54   --  Functions for S'Input attribute. These functions are also used for
55   --  S'Read, with the obvious transformation, since the input operation
56   --  is the same for all elementary types (no bounds or discriminants
57   --  are involved).
58
59   function I_AD  (Stream : not null access RST) return Fat_Pointer;
60   function I_AS  (Stream : not null access RST) return Thin_Pointer;
61   function I_B   (Stream : not null access RST) return Boolean;
62   function I_C   (Stream : not null access RST) return Character;
63   function I_F   (Stream : not null access RST) return Float;
64   function I_I   (Stream : not null access RST) return Integer;
65   function I_I24 (Stream : not null access RST) return Integer_24;
66   function I_LF  (Stream : not null access RST) return Long_Float;
67   function I_LI  (Stream : not null access RST) return Long_Integer;
68   function I_LLF (Stream : not null access RST) return Long_Long_Float;
69   function I_LLI (Stream : not null access RST) return Long_Long_Integer;
70   function I_LLU (Stream : not null access RST) return UST.Long_Long_Unsigned;
71   function I_LU  (Stream : not null access RST) return UST.Long_Unsigned;
72   function I_SF  (Stream : not null access RST) return Short_Float;
73   function I_SI  (Stream : not null access RST) return Short_Integer;
74   function I_SSI (Stream : not null access RST) return Short_Short_Integer;
75   function I_SSU (Stream : not null access RST) return
76                                                   UST.Short_Short_Unsigned;
77   function I_SU  (Stream : not null access RST) return UST.Short_Unsigned;
78   function I_U   (Stream : not null access RST) return UST.Unsigned;
79   function I_U24 (Stream : not null access RST) return Unsigned_24;
80   function I_WC  (Stream : not null access RST) return Wide_Character;
81   function I_WWC (Stream : not null access RST) return Wide_Wide_Character;
82
83   -----------------------
84   -- Output Procedures --
85   -----------------------
86
87   --  Procedures for S'Write attribute. These procedures are also used for
88   --  'Output, since for elementary types there is no difference between
89   --  'Write and 'Output because there are no discriminants or bounds to
90   --  be written.
91
92   procedure W_AD  (Stream : not null access RST; Item : Fat_Pointer);
93   procedure W_AS  (Stream : not null access RST; Item : Thin_Pointer);
94   procedure W_B   (Stream : not null access RST; Item : Boolean);
95   procedure W_C   (Stream : not null access RST; Item : Character);
96   procedure W_F   (Stream : not null access RST; Item : Float);
97   procedure W_I   (Stream : not null access RST; Item : Integer);
98   procedure W_I24 (Stream : not null access RST; Item : Integer_24);
99   procedure W_LF  (Stream : not null access RST; Item : Long_Float);
100   procedure W_LI  (Stream : not null access RST; Item : Long_Integer);
101   procedure W_LLF (Stream : not null access RST; Item : Long_Long_Float);
102   procedure W_LLI (Stream : not null access RST; Item : Long_Long_Integer);
103   procedure W_LLU (Stream : not null access RST; Item :
104                                                    UST.Long_Long_Unsigned);
105   procedure W_LU  (Stream : not null access RST; Item : UST.Long_Unsigned);
106   procedure W_SF  (Stream : not null access RST; Item : Short_Float);
107   procedure W_SI  (Stream : not null access RST; Item : Short_Integer);
108   procedure W_SSI (Stream : not null access RST; Item : Short_Short_Integer);
109   procedure W_SSU (Stream : not null access RST; Item :
110                                                    UST.Short_Short_Unsigned);
111   procedure W_SU  (Stream : not null access RST; Item : UST.Short_Unsigned);
112   procedure W_U   (Stream : not null access RST; Item : UST.Unsigned);
113   procedure W_U24 (Stream : not null access RST; Item : Unsigned_24);
114   procedure W_WC  (Stream : not null access RST; Item : Wide_Character);
115   procedure W_WWC (Stream : not null access RST; Item : Wide_Wide_Character);
116
117end System.Stream_Attributes.XDR;
118