------------------------------------------------------------------------------ -- -- -- 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 -- -- -- -- -- -- 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;