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------------------------------------------------------------------------------ -- -- -- GNAT RUN-TIME COMPONENTS -- -- -- -- S Y S T E M . S T R E A M _ A T T R I B U T E S -- -- -- -- B o d y -- -- -- -- Copyright (C) 1992-2009, 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 3, 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. -- -- -- -- As a special exception under Section 7 of GPL version 3, you are granted -- -- additional permissions described in the GCC Runtime Library Exception, -- -- version 3.1, as published by the Free Software Foundation. -- -- -- -- You should have received a copy of the GNU General Public License and -- -- a copy of the GCC Runtime Library Exception along with this program; -- -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- -- <http://www.gnu.org/licenses/>. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ with Ada.IO_Exceptions; with Ada.Streams; use Ada.Streams; with Ada.Unchecked_Conversion; package body System.Stream_Attributes is Err : exception renames Ada.IO_Exceptions.End_Error; -- Exception raised if insufficient data read (note that the RM implies -- that Data_Error might be the appropriate choice, but AI95-00132 -- decides with a binding interpretation that End_Error is preferred). SU : constant := System.Storage_Unit; subtype SEA is Ada.Streams.Stream_Element_Array; subtype SEO is Ada.Streams.Stream_Element_Offset; generic function UC renames Ada.Unchecked_Conversion; -- Subtypes used to define Stream_Element_Array values that map -- into the elementary types, using unchecked conversion. Thin_Pointer_Size : constant := System.Address'Size; Fat_Pointer_Size : constant := System.Address'Size * 2; subtype S_AD is SEA (1 .. (Fat_Pointer_Size + SU - 1) / SU); subtype S_AS is SEA (1 .. (Thin_Pointer_Size + SU - 1) / SU); subtype S_B is SEA (1 .. (Boolean'Size + SU - 1) / SU); subtype S_C is SEA (1 .. (Character'Size + SU - 1) / SU); subtype S_F is SEA (1 .. (Float'Size + SU - 1) / SU); subtype S_I is SEA (1 .. (Integer'Size + SU - 1) / SU); subtype S_LF is SEA (1 .. (Long_Float'Size + SU - 1) / SU); subtype S_LI is SEA (1 .. (Long_Integer'Size + SU - 1) / SU); subtype S_LLF is SEA (1 .. (Long_Long_Float'Size + SU - 1) / SU); subtype S_LLI is SEA (1 .. (Long_Long_Integer'Size + SU - 1) / SU); subtype S_LLU is SEA (1 .. (UST.Long_Long_Unsigned'Size + SU - 1) / SU); subtype S_LU is SEA (1 .. (UST.Long_Unsigned'Size + SU - 1) / SU); subtype S_SF is SEA (1 .. (Short_Float'Size + SU - 1) / SU); subtype S_SI is SEA (1 .. (Short_Integer'Size + SU - 1) / SU); subtype S_SSI is SEA (1 .. (Short_Short_Integer'Size + SU - 1) / SU); subtype S_SSU is SEA (1 .. (UST.Short_Short_Unsigned'Size + SU - 1) / SU); subtype S_SU is SEA (1 .. (UST.Short_Unsigned'Size + SU - 1) / SU); subtype S_U is SEA (1 .. (UST.Unsigned'Size + SU - 1) / SU); subtype S_WC is SEA (1 .. (Wide_Character'Size + SU - 1) / SU); subtype S_WWC is SEA (1 .. (Wide_Wide_Character'Size + SU - 1) / SU); -- Unchecked conversions from the elementary type to the stream type function From_AD is new UC (Fat_Pointer, S_AD); function From_AS is new UC (Thin_Pointer, S_AS); function From_F is new UC (Float, S_F); function From_I is new UC (Integer, S_I); function From_LF is new UC (Long_Float, S_LF); function From_LI is new UC (Long_Integer, S_LI); function From_LLF is new UC (Long_Long_Float, S_LLF); function From_LLI is new UC (Long_Long_Integer, S_LLI); function From_LLU is new UC (UST.Long_Long_Unsigned, S_LLU); function From_LU is new UC (UST.Long_Unsigned, S_LU); function From_SF is new UC (Short_Float, S_SF); function From_SI is new UC (Short_Integer, S_SI); function From_SSI is new UC (Short_Short_Integer, S_SSI); function From_SSU is new UC (UST.Short_Short_Unsigned, S_SSU); function From_SU is new UC (UST.Short_Unsigned, S_SU); function From_U is new UC (UST.Unsigned, S_U); function From_WC is new UC (Wide_Character, S_WC); function From_WWC is new UC (Wide_Wide_Character, S_WWC); -- Unchecked conversions from the stream type to elementary type function To_AD is new UC (S_AD, Fat_Pointer); function To_AS is new UC (S_AS, Thin_Pointer); function To_F is new UC (S_F, Float); function To_I is new UC (S_I, Integer); function To_LF is new UC (S_LF, Long_Float); function To_LI is new UC (S_LI, Long_Integer); function To_LLF is new UC (S_LLF, Long_Long_Float); function To_LLI is new UC (S_LLI, Long_Long_Integer); function To_LLU is new UC (S_LLU, UST.Long_Long_Unsigned); function To_LU is new UC (S_LU, UST.Long_Unsigned); function To_SF is new UC (S_SF, Short_Float); function To_SI is new UC (S_SI, Short_Integer); function To_SSI is new UC (S_SSI, Short_Short_Integer); function To_SSU is new UC (S_SSU, UST.Short_Short_Unsigned); function To_SU is new UC (S_SU, UST.Short_Unsigned); function To_U is new UC (S_U, UST.Unsigned); function To_WC is new UC (S_WC, Wide_Character); function To_WWC is new UC (S_WWC, Wide_Wide_Character); ----------------- -- Block_IO_OK -- ----------------- function Block_IO_OK return Boolean is begin return True; end Block_IO_OK; ---------- -- I_AD -- ---------- function I_AD (Stream : not null access RST) return Fat_Pointer is T : S_AD; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return To_AD (T); end if; end I_AD; ---------- -- I_AS -- ---------- function I_AS (Stream : not null access RST) return Thin_Pointer is T : S_AS; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return To_AS (T); end if; end I_AS; --------- -- I_B -- --------- function I_B (Stream : not null access RST) return Boolean is T : S_B; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return Boolean'Val (T (1)); end if; end I_B; --------- -- I_C -- --------- function I_C (Stream : not null access RST) return Character is T : S_C; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return Character'Val (T (1)); end if; end I_C; --------- -- I_F -- --------- function I_F (Stream : not null access RST) return Float is T : S_F; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return To_F (T); end if; end I_F; --------- -- I_I -- --------- function I_I (Stream : not null access RST) return Integer is T : S_I; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return To_I (T); end if; end I_I; ---------- -- I_LF -- ---------- function I_LF (Stream : not null access RST) return Long_Float is T : S_LF; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return To_LF (T); end if; end I_LF; ---------- -- I_LI -- ---------- function I_LI (Stream : not null access RST) return Long_Integer is T : S_LI; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return To_LI (T); end if; end I_LI; ----------- -- I_LLF -- ----------- function I_LLF (Stream : not null access RST) return Long_Long_Float is T : S_LLF; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return To_LLF (T); end if; end I_LLF; ----------- -- I_LLI -- ----------- function I_LLI (Stream : not null access RST) return Long_Long_Integer is T : S_LLI; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return To_LLI (T); end if; end I_LLI; ----------- -- I_LLU -- ----------- function I_LLU (Stream : not null access RST) return UST.Long_Long_Unsigned is T : S_LLU; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return To_LLU (T); end if; end I_LLU; ---------- -- I_LU -- ---------- function I_LU (Stream : not null access RST) return UST.Long_Unsigned is T : S_LU; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return To_LU (T); end if; end I_LU; ---------- -- I_SF -- ---------- function I_SF (Stream : not null access RST) return Short_Float is T : S_SF; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return To_SF (T); end if; end I_SF; ---------- -- I_SI -- ---------- function I_SI (Stream : not null access RST) return Short_Integer is T : S_SI; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return To_SI (T); end if; end I_SI; ----------- -- I_SSI -- ----------- function I_SSI (Stream : not null access RST) return Short_Short_Integer is T : S_SSI; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return To_SSI (T); end if; end I_SSI; ----------- -- I_SSU -- ----------- function I_SSU (Stream : not null access RST) return UST.Short_Short_Unsigned is T : S_SSU; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return To_SSU (T); end if; end I_SSU; ---------- -- I_SU -- ---------- function I_SU (Stream : not null access RST) return UST.Short_Unsigned is T : S_SU; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return To_SU (T); end if; end I_SU; --------- -- I_U -- --------- function I_U (Stream : not null access RST) return UST.Unsigned is T : S_U; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return To_U (T); end if; end I_U; ---------- -- I_WC -- ---------- function I_WC (Stream : not null access RST) return Wide_Character is T : S_WC; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return To_WC (T); end if; end I_WC; ----------- -- I_WWC -- ----------- function I_WWC (Stream : not null access RST) return Wide_Wide_Character is T : S_WWC; L : SEO; begin Ada.Streams.Read (Stream.all, T, L); if L < T'Last then raise Err; else return To_WWC (T); end if; end I_WWC; ---------- -- W_AD -- ---------- procedure W_AD (Stream : not null access RST; Item : Fat_Pointer) is T : constant S_AD := From_AD (Item); begin Ada.Streams.Write (Stream.all, T); end W_AD; ---------- -- W_AS -- ---------- procedure W_AS (Stream : not null access RST; Item : Thin_Pointer) is T : constant S_AS := From_AS (Item); begin Ada.Streams.Write (Stream.all, T); end W_AS; --------- -- W_B -- --------- procedure W_B (Stream : not null access RST; Item : Boolean) is T : S_B; begin T (1) := Boolean'Pos (Item); Ada.Streams.Write (Stream.all, T); end W_B; --------- -- W_C -- --------- procedure W_C (Stream : not null access RST; Item : Character) is T : S_C; begin T (1) := Character'Pos (Item); Ada.Streams.Write (Stream.all, T); end W_C; --------- -- W_F -- --------- procedure W_F (Stream : not null access RST; Item : Float) is T : constant S_F := From_F (Item); begin Ada.Streams.Write (Stream.all, T); end W_F; --------- -- W_I -- --------- procedure W_I (Stream : not null access RST; Item : Integer) is T : constant S_I := From_I (Item); begin Ada.Streams.Write (Stream.all, T); end W_I; ---------- -- W_LF -- ---------- procedure W_LF (Stream : not null access RST; Item : Long_Float) is T : constant S_LF := From_LF (Item); begin Ada.Streams.Write (Stream.all, T); end W_LF; ---------- -- W_LI -- ---------- procedure W_LI (Stream : not null access RST; Item : Long_Integer) is T : constant S_LI := From_LI (Item); begin Ada.Streams.Write (Stream.all, T); end W_LI; ----------- -- W_LLF -- ----------- procedure W_LLF (Stream : not null access RST; Item : Long_Long_Float) is T : constant S_LLF := From_LLF (Item); begin Ada.Streams.Write (Stream.all, T); end W_LLF; ----------- -- W_LLI -- ----------- procedure W_LLI (Stream : not null access RST; Item : Long_Long_Integer) is T : constant S_LLI := From_LLI (Item); begin Ada.Streams.Write (Stream.all, T); end W_LLI; ----------- -- W_LLU -- ----------- procedure W_LLU (Stream : not null access RST; Item : UST.Long_Long_Unsigned) is T : constant S_LLU := From_LLU (Item); begin Ada.Streams.Write (Stream.all, T); end W_LLU; ---------- -- W_LU -- ---------- procedure W_LU (Stream : not null access RST; Item : UST.Long_Unsigned) is T : constant S_LU := From_LU (Item); begin Ada.Streams.Write (Stream.all, T); end W_LU; ---------- -- W_SF -- ---------- procedure W_SF (Stream : not null access RST; Item : Short_Float) is T : constant S_SF := From_SF (Item); begin Ada.Streams.Write (Stream.all, T); end W_SF; ---------- -- W_SI -- ---------- procedure W_SI (Stream : not null access RST; Item : Short_Integer) is T : constant S_SI := From_SI (Item); begin Ada.Streams.Write (Stream.all, T); end W_SI; ----------- -- W_SSI -- ----------- procedure W_SSI (Stream : not null access RST; Item : Short_Short_Integer) is T : constant S_SSI := From_SSI (Item); begin Ada.Streams.Write (Stream.all, T); end W_SSI; ----------- -- W_SSU -- ----------- procedure W_SSU (Stream : not null access RST; Item : UST.Short_Short_Unsigned) is T : constant S_SSU := From_SSU (Item); begin Ada.Streams.Write (Stream.all, T); end W_SSU; ---------- -- W_SU -- ---------- procedure W_SU (Stream : not null access RST; Item : UST.Short_Unsigned) is T : constant S_SU := From_SU (Item); begin Ada.Streams.Write (Stream.all, T); end W_SU; --------- -- W_U -- --------- procedure W_U (Stream : not null access RST; Item : UST.Unsigned) is T : constant S_U := From_U (Item); begin Ada.Streams.Write (Stream.all, T); end W_U; ---------- -- W_WC -- ---------- procedure W_WC (Stream : not null access RST; Item : Wide_Character) is T : constant S_WC := From_WC (Item); begin Ada.Streams.Write (Stream.all, T); end W_WC; ----------- -- W_WWC -- ----------- procedure W_WWC (Stream : not null access RST; Item : Wide_Wide_Character) is T : constant S_WWC := From_WWC (Item); begin Ada.Streams.Write (Stream.all, T); end W_WWC; end System.Stream_Attributes;
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