+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- 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: 1.1.16.2 $
--- --
--- 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. --
--- Extensive contributions were provided by Ada Core Technologies Inc. --
--- --
-------------------------------------------------------------------------------
-
--- 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;