New Language: Ada

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@45957 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 194 insertions, 0 deletions

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+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT RUNTIME COMPONENTS                          --
+--                                                                          --
+--             S Y S T E M . S T R E A M _ A T T R I B U T E S              --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--                            $Revision: 1.4 $                              --
+--                                                                          --
+--          Copyright (C) 1992-2000 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 2,  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.  See the GNU General Public License --
+-- for  more details.  You should have  received  a copy of the GNU General --
+-- Public License  distributed with GNAT;  see file COPYING.  If not, write --
+-- to  the Free Software Foundation,  59 Temple Place - Suite 330,  Boston, --
+-- MA 02111-1307, USA.                                                      --
+--                                                                          --
+-- As a special exception,  if other files  instantiate  generics from this --
+-- unit, or you link  this unit with other files  to produce an executable, --
+-- this  unit  does not  by itself cause  the resulting  executable  to  be --
+-- covered  by the  GNU  General  Public  License.  This exception does not --
+-- however invalidate  any other reasons why  the executable file  might be --
+-- covered by the  GNU Public License.                                      --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This package contains the implementations of the stream attributes for
+--  elementary types. These are the subprograms that are directly accessed
+--  by occurrences of the stream attributes where the type is elementary.
+
+--  We only provide the subprograms for the standard base types. For user
+--  defined types, the subprogram for the corresponding root type is called
+--  with an appropriate conversion.
+
+with System;
+with System.Unsigned_Types;
+with Ada.Streams;
+
+package System.Stream_Attributes is
+pragma Preelaborate (Stream_Attributes);
+
+   pragma Suppress (Accessibility_Check, Stream_Attributes);
+   --  No need to check accessibility on arguments of subprograms
+
+   package UST renames System.Unsigned_Types;
+
+   subtype RST is Ada.Streams.Root_Stream_Type'Class;
+
+   --  Enumeration types are usually transferred using the routine for the
+   --  corresponding integer. The exception is that special routines are
+   --  provided for Boolean and the character types, in case the protocol
+   --  in use provides specially for these types.
+
+   --  Access types use either a thin pointer (single address) or fat pointer
+   --  (double address) form. The following types are used to hold access
+   --  values using unchecked conversions.
+
+   type Thin_Pointer is record
+      P1 : System.Address;
+   end record;
+
+   type Fat_Pointer is record
+      P1 : System.Address;
+      P2 : System.Address;
+   end record;
+
+   ------------------------------------
+   -- Treatment of enumeration types --
+   ------------------------------------
+
+   --  In this interface, there are no specific routines for general input
+   --  or output of enumeration types. Generally, enumeration types whose
+   --  representation is unsigned (no negative representation values) are
+   --  treated as unsigned integers, and enumeration types that do have
+   --  negative representation values are treated as signed integers.
+
+   --  An exception is that there are specialized routines for Boolean,
+   --  Character, and Wide_Character types, but these specialized routines
+   --  are used only if the type in question has a standard representation.
+   --  For the case of a non-standard representation (one where the size of
+   --  the first subtype is specified, or where an enumeration representation
+   --  clause is given, these three types are treated like any other cases
+   --  of enumeration types, as described above.
+   --  for
+
+   ---------------------
+   -- Input Functions --
+   ---------------------
+
+   --  Functions for S'Input attribute. These functions are also used for
+   --  S'Read, with the obvious transformation, since the input operation
+   --  is the same for all elementary types (no bounds or discriminants
+   --  are involved).
+
+   function I_AD  (Stream : access RST) return Fat_Pointer;
+   function I_AS  (Stream : access RST) return Thin_Pointer;
+   function I_B   (Stream : access RST) return Boolean;
+   function I_C   (Stream : access RST) return Character;
+   function I_F   (Stream : access RST) return Float;
+   function I_I   (Stream : access RST) return Integer;
+   function I_LF  (Stream : access RST) return Long_Float;
+   function I_LI  (Stream : access RST) return Long_Integer;
+   function I_LLF (Stream : access RST) return Long_Long_Float;
+   function I_LLI (Stream : access RST) return Long_Long_Integer;
+   function I_LLU (Stream : access RST) return UST.Long_Long_Unsigned;
+   function I_LU  (Stream : access RST) return UST.Long_Unsigned;
+   function I_SF  (Stream : access RST) return Short_Float;
+   function I_SI  (Stream : access RST) return Short_Integer;
+   function I_SSI (Stream : access RST) return Short_Short_Integer;
+   function I_SSU (Stream : access RST) return UST.Short_Short_Unsigned;
+   function I_SU  (Stream : access RST) return UST.Short_Unsigned;
+   function I_U   (Stream : access RST) return UST.Unsigned;
+   function I_WC  (Stream : access RST) return Wide_Character;
+
+   -----------------------
+   -- Output Procedures --
+   -----------------------
+
+   --  Procedures for S'Write attribute. These procedures are also used
+   --  for 'Output, since for elementary types there is no difference
+   --  between 'Write and 'Output because there are no discriminants
+   --  or bounds to be written.
+
+   procedure W_AD  (Stream : access RST; Item : in Fat_Pointer);
+   procedure W_AS  (Stream : access RST; Item : in Thin_Pointer);
+   procedure W_B   (Stream : access RST; Item : in Boolean);
+   procedure W_C   (Stream : access RST; Item : in Character);
+   procedure W_F   (Stream : access RST; Item : in Float);
+   procedure W_I   (Stream : access RST; Item : in Integer);
+   procedure W_LF  (Stream : access RST; Item : in Long_Float);
+   procedure W_LI  (Stream : access RST; Item : in Long_Integer);
+   procedure W_LLF (Stream : access RST; Item : in Long_Long_Float);
+   procedure W_LLI (Stream : access RST; Item : in Long_Long_Integer);
+   procedure W_LLU (Stream : access RST; Item : in UST.Long_Long_Unsigned);
+   procedure W_LU  (Stream : access RST; Item : in UST.Long_Unsigned);
+   procedure W_SF  (Stream : access RST; Item : in Short_Float);
+   procedure W_SI  (Stream : access RST; Item : in Short_Integer);
+   procedure W_SSI (Stream : access RST; Item : in Short_Short_Integer);
+   procedure W_SSU (Stream : access RST; Item : in UST.Short_Short_Unsigned);
+   procedure W_SU  (Stream : access RST; Item : in UST.Short_Unsigned);
+   procedure W_U   (Stream : access RST; Item : in UST.Unsigned);
+   procedure W_WC  (Stream : access RST; Item : in Wide_Character);
+
+private
+   pragma Inline (I_AD);
+   pragma Inline (I_AS);
+   pragma Inline (I_B);
+   pragma Inline (I_C);
+   pragma Inline (I_F);
+   pragma Inline (I_I);
+   pragma Inline (I_LF);
+   pragma Inline (I_LI);
+   pragma Inline (I_LLF);
+   pragma Inline (I_LLI);
+   pragma Inline (I_LLU);
+   pragma Inline (I_LU);
+   pragma Inline (I_SF);
+   pragma Inline (I_SI);
+   pragma Inline (I_SSI);
+   pragma Inline (I_SSU);
+   pragma Inline (I_SU);
+   pragma Inline (I_U);
+   pragma Inline (I_WC);
+
+   pragma Inline (W_AD);
+   pragma Inline (W_AS);
+   pragma Inline (W_B);
+   pragma Inline (W_C);
+   pragma Inline (W_F);
+   pragma Inline (W_I);
+   pragma Inline (W_LF);
+   pragma Inline (W_LI);
+   pragma Inline (W_LLF);
+   pragma Inline (W_LLI);
+   pragma Inline (W_LLU);
+   pragma Inline (W_LU);
+   pragma Inline (W_SF);
+   pragma Inline (W_SI);
+   pragma Inline (W_SSI);
+   pragma Inline (W_SSU);
+   pragma Inline (W_SU);
+   pragma Inline (W_U);
+   pragma Inline (W_WC);
+
+end System.Stream_Attributes;