1 ------------------------------------------------------------------------------
3 -- GNAT RUNTIME COMPONENTS --
5 -- S Y S T E M . S T R E A M _ A T T R I B U T E S --
10 -- Copyright (C) 1992-1998, Free Software Foundation, Inc. --
12 -- GNAT is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 2, or (at your option) any later ver- --
15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNAT; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, USA. --
23 -- As a special exception, if other files instantiate generics from this --
24 -- unit, or you link this unit with other files to produce an executable, --
25 -- this unit does not by itself cause the resulting executable to be --
26 -- covered by the GNU General Public License. This exception does not --
27 -- however invalidate any other reasons why the executable file might be --
28 -- covered by the GNU Public License. --
30 -- GNAT was originally developed by the GNAT team at New York University. --
31 -- Extensive contributions were provided by Ada Core Technologies Inc. --
33 ------------------------------------------------------------------------------
35 with Ada.IO_Exceptions;
36 with Ada.Streams; use Ada.Streams;
37 with Unchecked_Conversion;
39 package body System.Stream_Attributes is
41 Err : exception renames Ada.IO_Exceptions.End_Error;
42 -- Exception raised if insufficient data read (note that the RM implies
43 -- that Data_Error might be the appropriate choice, but AI195-00132
44 -- decides with a binding interpretation that End_Error is preferred).
46 SU : constant := System.Storage_Unit;
48 subtype SEA is Ada.Streams.Stream_Element_Array;
49 subtype SEO is Ada.Streams.Stream_Element_Offset;
51 generic function UC renames Unchecked_Conversion;
53 -- Subtypes used to define Stream_Element_Array values that map
54 -- into the elementary types, using unchecked conversion.
56 Thin_Pointer_Size : constant := System.Address'Size;
57 Fat_Pointer_Size : constant := System.Address'Size * 2;
59 subtype S_AD is SEA (1 .. (Fat_Pointer_Size + SU - 1) / SU);
60 subtype S_AS is SEA (1 .. (Thin_Pointer_Size + SU - 1) / SU);
61 subtype S_B is SEA (1 .. (Boolean'Size + SU - 1) / SU);
62 subtype S_C is SEA (1 .. (Character'Size + SU - 1) / SU);
63 subtype S_F is SEA (1 .. (Float'Size + SU - 1) / SU);
64 subtype S_I is SEA (1 .. (Integer'Size + SU - 1) / SU);
65 subtype S_LF is SEA (1 .. (Long_Float'Size + SU - 1) / SU);
66 subtype S_LI is SEA (1 .. (Long_Integer'Size + SU - 1) / SU);
67 subtype S_LLF is SEA (1 .. (Long_Long_Float'Size + SU - 1) / SU);
68 subtype S_LLI is SEA (1 .. (Long_Long_Integer'Size + SU - 1) / SU);
69 subtype S_LLU is SEA (1 .. (UST.Long_Long_Unsigned'Size + SU - 1) / SU);
70 subtype S_LU is SEA (1 .. (UST.Long_Unsigned'Size + SU - 1) / SU);
71 subtype S_SF is SEA (1 .. (Short_Float'Size + SU - 1) / SU);
72 subtype S_SI is SEA (1 .. (Short_Integer'Size + SU - 1) / SU);
73 subtype S_SSI is SEA (1 .. (Short_Short_Integer'Size + SU - 1) / SU);
74 subtype S_SSU is SEA (1 .. (UST.Short_Short_Unsigned'Size + SU - 1) / SU);
75 subtype S_SU is SEA (1 .. (UST.Short_Unsigned'Size + SU - 1) / SU);
76 subtype S_U is SEA (1 .. (UST.Unsigned'Size + SU - 1) / SU);
77 subtype S_WC is SEA (1 .. (Wide_Character'Size + SU - 1) / SU);
79 -- Unchecked conversions from the elementary type to the stream type
81 function From_AD is new UC (Fat_Pointer, S_AD);
82 function From_AS is new UC (Thin_Pointer, S_AS);
83 function From_C is new UC (Character, S_C);
84 function From_F is new UC (Float, S_F);
85 function From_I is new UC (Integer, S_I);
86 function From_LF is new UC (Long_Float, S_LF);
87 function From_LI is new UC (Long_Integer, S_LI);
88 function From_LLF is new UC (Long_Long_Float, S_LLF);
89 function From_LLI is new UC (Long_Long_Integer, S_LLI);
90 function From_LLU is new UC (UST.Long_Long_Unsigned, S_LLU);
91 function From_LU is new UC (UST.Long_Unsigned, S_LU);
92 function From_SF is new UC (Short_Float, S_SF);
93 function From_SI is new UC (Short_Integer, S_SI);
94 function From_SSI is new UC (Short_Short_Integer, S_SSI);
95 function From_SSU is new UC (UST.Short_Short_Unsigned, S_SSU);
96 function From_SU is new UC (UST.Short_Unsigned, S_SU);
97 function From_U is new UC (UST.Unsigned, S_U);
98 function From_WC is new UC (Wide_Character, S_WC);
100 -- Unchecked conversions from the stream type to elementary type
102 function To_AD is new UC (S_AD, Fat_Pointer);
103 function To_AS is new UC (S_AS, Thin_Pointer);
104 function To_C is new UC (S_C, Character);
105 function To_F is new UC (S_F, Float);
106 function To_I is new UC (S_I, Integer);
107 function To_LF is new UC (S_LF, Long_Float);
108 function To_LI is new UC (S_LI, Long_Integer);
109 function To_LLF is new UC (S_LLF, Long_Long_Float);
110 function To_LLI is new UC (S_LLI, Long_Long_Integer);
111 function To_LLU is new UC (S_LLU, UST.Long_Long_Unsigned);
112 function To_LU is new UC (S_LU, UST.Long_Unsigned);
113 function To_SF is new UC (S_SF, Short_Float);
114 function To_SI is new UC (S_SI, Short_Integer);
115 function To_SSI is new UC (S_SSI, Short_Short_Integer);
116 function To_SSU is new UC (S_SSU, UST.Short_Short_Unsigned);
117 function To_SU is new UC (S_SU, UST.Short_Unsigned);
118 function To_U is new UC (S_U, UST.Unsigned);
119 function To_WC is new UC (S_WC, Wide_Character);
125 function I_AD (Stream : access RST) return Fat_Pointer is
130 Ada.Streams.Read (Stream.all, T, L);
143 function I_AS (Stream : access RST) return Thin_Pointer is
148 Ada.Streams.Read (Stream.all, T, L);
161 function I_B (Stream : access RST) return Boolean is
166 Ada.Streams.Read (Stream.all, T, L);
171 return Boolean'Val (T (1));
179 function I_C (Stream : access RST) return Character is
184 Ada.Streams.Read (Stream.all, T, L);
197 function I_F (Stream : access RST) return Float is
202 Ada.Streams.Read (Stream.all, T, L);
215 function I_I (Stream : access RST) return Integer is
220 Ada.Streams.Read (Stream.all, T, L);
233 function I_LF (Stream : access RST) return Long_Float is
238 Ada.Streams.Read (Stream.all, T, L);
251 function I_LI (Stream : access RST) return Long_Integer is
256 Ada.Streams.Read (Stream.all, T, L);
269 function I_LLF (Stream : access RST) return Long_Long_Float is
274 Ada.Streams.Read (Stream.all, T, L);
287 function I_LLI (Stream : access RST) return Long_Long_Integer is
292 Ada.Streams.Read (Stream.all, T, L);
305 function I_LLU (Stream : access RST) return UST.Long_Long_Unsigned is
310 Ada.Streams.Read (Stream.all, T, L);
323 function I_LU (Stream : access RST) return UST.Long_Unsigned is
328 Ada.Streams.Read (Stream.all, T, L);
341 function I_SF (Stream : access RST) return Short_Float is
346 Ada.Streams.Read (Stream.all, T, L);
359 function I_SI (Stream : access RST) return Short_Integer is
364 Ada.Streams.Read (Stream.all, T, L);
377 function I_SSI (Stream : access RST) return Short_Short_Integer is
382 Ada.Streams.Read (Stream.all, T, L);
395 function I_SSU (Stream : access RST) return UST.Short_Short_Unsigned is
400 Ada.Streams.Read (Stream.all, T, L);
413 function I_SU (Stream : access RST) return UST.Short_Unsigned is
418 Ada.Streams.Read (Stream.all, T, L);
431 function I_U (Stream : access RST) return UST.Unsigned is
436 Ada.Streams.Read (Stream.all, T, L);
449 function I_WC (Stream : access RST) return Wide_Character is
454 Ada.Streams.Read (Stream.all, T, L);
467 procedure W_AD (Stream : access RST; Item : in Fat_Pointer) is
468 T : constant S_AD := From_AD (Item);
471 Ada.Streams.Write (Stream.all, T);
478 procedure W_AS (Stream : access RST; Item : in Thin_Pointer) is
479 T : constant S_AS := From_AS (Item);
482 Ada.Streams.Write (Stream.all, T);
489 procedure W_B (Stream : access RST; Item : in Boolean) is
493 T (1) := Boolean'Pos (Item);
494 Ada.Streams.Write (Stream.all, T);
501 procedure W_C (Stream : access RST; Item : in Character) is
502 T : constant S_C := From_C (Item);
505 Ada.Streams.Write (Stream.all, T);
512 procedure W_F (Stream : access RST; Item : in Float) is
513 T : constant S_F := From_F (Item);
516 Ada.Streams.Write (Stream.all, T);
523 procedure W_I (Stream : access RST; Item : in Integer) is
524 T : constant S_I := From_I (Item);
527 Ada.Streams.Write (Stream.all, T);
534 procedure W_LF (Stream : access RST; Item : in Long_Float) is
535 T : constant S_LF := From_LF (Item);
538 Ada.Streams.Write (Stream.all, T);
545 procedure W_LI (Stream : access RST; Item : in Long_Integer) is
546 T : constant S_LI := From_LI (Item);
549 Ada.Streams.Write (Stream.all, T);
556 procedure W_LLF (Stream : access RST; Item : in Long_Long_Float) is
557 T : constant S_LLF := From_LLF (Item);
560 Ada.Streams.Write (Stream.all, T);
567 procedure W_LLI (Stream : access RST; Item : in Long_Long_Integer) is
568 T : constant S_LLI := From_LLI (Item);
571 Ada.Streams.Write (Stream.all, T);
578 procedure W_LLU (Stream : access RST; Item : in UST.Long_Long_Unsigned) is
579 T : constant S_LLU := From_LLU (Item);
582 Ada.Streams.Write (Stream.all, T);
589 procedure W_LU (Stream : access RST; Item : in UST.Long_Unsigned) is
590 T : constant S_LU := From_LU (Item);
593 Ada.Streams.Write (Stream.all, T);
600 procedure W_SF (Stream : access RST; Item : in Short_Float) is
601 T : constant S_SF := From_SF (Item);
604 Ada.Streams.Write (Stream.all, T);
611 procedure W_SI (Stream : access RST; Item : in Short_Integer) is
612 T : constant S_SI := From_SI (Item);
615 Ada.Streams.Write (Stream.all, T);
622 procedure W_SSI (Stream : access RST; Item : in Short_Short_Integer) is
623 T : constant S_SSI := From_SSI (Item);
626 Ada.Streams.Write (Stream.all, T);
633 procedure W_SSU (Stream : access RST; Item : in UST.Short_Short_Unsigned) is
634 T : constant S_SSU := From_SSU (Item);
637 Ada.Streams.Write (Stream.all, T);
644 procedure W_SU (Stream : access RST; Item : in UST.Short_Unsigned) is
645 T : constant S_SU := From_SU (Item);
648 Ada.Streams.Write (Stream.all, T);
655 procedure W_U (Stream : access RST; Item : in UST.Unsigned) is
656 T : constant S_U := From_U (Item);
659 Ada.Streams.Write (Stream.all, T);
666 procedure W_WC (Stream : access RST; Item : in Wide_Character) is
667 T : constant S_WC := From_WC (Item);
670 Ada.Streams.Write (Stream.all, T);
673 end System.Stream_Attributes;