1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
5 -- S Y S T E M . S T R E A M _ A T T R I B U T E S --
9 -- Copyright (C) 1992-2005, Free Software Foundation, Inc. --
11 -- GNAT is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 with Ada.IO_Exceptions;
35 with Ada.Streams; use Ada.Streams;
36 with Unchecked_Conversion;
38 package body System.Stream_Attributes is
40 Err : exception renames Ada.IO_Exceptions.End_Error;
41 -- Exception raised if insufficient data read (note that the RM implies
42 -- that Data_Error might be the appropriate choice, but AI95-00132
43 -- decides with a binding interpretation that End_Error is preferred).
45 SU : constant := System.Storage_Unit;
47 subtype SEA is Ada.Streams.Stream_Element_Array;
48 subtype SEO is Ada.Streams.Stream_Element_Offset;
50 generic function UC renames Unchecked_Conversion;
52 -- Subtypes used to define Stream_Element_Array values that map
53 -- into the elementary types, using unchecked conversion.
55 Thin_Pointer_Size : constant := System.Address'Size;
56 Fat_Pointer_Size : constant := System.Address'Size * 2;
58 subtype S_AD is SEA (1 .. (Fat_Pointer_Size + SU - 1) / SU);
59 subtype S_AS is SEA (1 .. (Thin_Pointer_Size + SU - 1) / SU);
60 subtype S_B is SEA (1 .. (Boolean'Size + SU - 1) / SU);
61 subtype S_C is SEA (1 .. (Character'Size + SU - 1) / SU);
62 subtype S_F is SEA (1 .. (Float'Size + SU - 1) / SU);
63 subtype S_I is SEA (1 .. (Integer'Size + SU - 1) / SU);
64 subtype S_LF is SEA (1 .. (Long_Float'Size + SU - 1) / SU);
65 subtype S_LI is SEA (1 .. (Long_Integer'Size + SU - 1) / SU);
66 subtype S_LLF is SEA (1 .. (Long_Long_Float'Size + SU - 1) / SU);
67 subtype S_LLI is SEA (1 .. (Long_Long_Integer'Size + SU - 1) / SU);
68 subtype S_LLU is SEA (1 .. (UST.Long_Long_Unsigned'Size + SU - 1) / SU);
69 subtype S_LU is SEA (1 .. (UST.Long_Unsigned'Size + SU - 1) / SU);
70 subtype S_SF is SEA (1 .. (Short_Float'Size + SU - 1) / SU);
71 subtype S_SI is SEA (1 .. (Short_Integer'Size + SU - 1) / SU);
72 subtype S_SSI is SEA (1 .. (Short_Short_Integer'Size + SU - 1) / SU);
73 subtype S_SSU is SEA (1 .. (UST.Short_Short_Unsigned'Size + SU - 1) / SU);
74 subtype S_SU is SEA (1 .. (UST.Short_Unsigned'Size + SU - 1) / SU);
75 subtype S_U is SEA (1 .. (UST.Unsigned'Size + SU - 1) / SU);
76 subtype S_WC is SEA (1 .. (Wide_Character'Size + SU - 1) / SU);
78 -- Unchecked conversions from the elementary type to the stream type
80 function From_AD is new UC (Fat_Pointer, S_AD);
81 function From_AS is new UC (Thin_Pointer, S_AS);
82 function From_F is new UC (Float, S_F);
83 function From_I is new UC (Integer, S_I);
84 function From_LF is new UC (Long_Float, S_LF);
85 function From_LI is new UC (Long_Integer, S_LI);
86 function From_LLF is new UC (Long_Long_Float, S_LLF);
87 function From_LLI is new UC (Long_Long_Integer, S_LLI);
88 function From_LLU is new UC (UST.Long_Long_Unsigned, S_LLU);
89 function From_LU is new UC (UST.Long_Unsigned, S_LU);
90 function From_SF is new UC (Short_Float, S_SF);
91 function From_SI is new UC (Short_Integer, S_SI);
92 function From_SSI is new UC (Short_Short_Integer, S_SSI);
93 function From_SSU is new UC (UST.Short_Short_Unsigned, S_SSU);
94 function From_SU is new UC (UST.Short_Unsigned, S_SU);
95 function From_U is new UC (UST.Unsigned, S_U);
96 function From_WC is new UC (Wide_Character, S_WC);
98 -- Unchecked conversions from the stream type to elementary type
100 function To_AD is new UC (S_AD, Fat_Pointer);
101 function To_AS is new UC (S_AS, Thin_Pointer);
102 function To_F is new UC (S_F, Float);
103 function To_I is new UC (S_I, Integer);
104 function To_LF is new UC (S_LF, Long_Float);
105 function To_LI is new UC (S_LI, Long_Integer);
106 function To_LLF is new UC (S_LLF, Long_Long_Float);
107 function To_LLI is new UC (S_LLI, Long_Long_Integer);
108 function To_LLU is new UC (S_LLU, UST.Long_Long_Unsigned);
109 function To_LU is new UC (S_LU, UST.Long_Unsigned);
110 function To_SF is new UC (S_SF, Short_Float);
111 function To_SI is new UC (S_SI, Short_Integer);
112 function To_SSI is new UC (S_SSI, Short_Short_Integer);
113 function To_SSU is new UC (S_SSU, UST.Short_Short_Unsigned);
114 function To_SU is new UC (S_SU, UST.Short_Unsigned);
115 function To_U is new UC (S_U, UST.Unsigned);
116 function To_WC is new UC (S_WC, Wide_Character);
122 function I_AD (Stream : access RST) return Fat_Pointer is
127 Ada.Streams.Read (Stream.all, T, L);
140 function I_AS (Stream : access RST) return Thin_Pointer is
145 Ada.Streams.Read (Stream.all, T, L);
158 function I_B (Stream : access RST) return Boolean is
163 Ada.Streams.Read (Stream.all, T, L);
168 return Boolean'Val (T (1));
176 function I_C (Stream : access RST) return Character is
181 Ada.Streams.Read (Stream.all, T, L);
186 return Character'Val (T (1));
194 function I_F (Stream : access RST) return Float is
199 Ada.Streams.Read (Stream.all, T, L);
212 function I_I (Stream : access RST) return Integer is
217 Ada.Streams.Read (Stream.all, T, L);
230 function I_LF (Stream : access RST) return Long_Float is
235 Ada.Streams.Read (Stream.all, T, L);
248 function I_LI (Stream : access RST) return Long_Integer is
253 Ada.Streams.Read (Stream.all, T, L);
266 function I_LLF (Stream : access RST) return Long_Long_Float is
271 Ada.Streams.Read (Stream.all, T, L);
284 function I_LLI (Stream : access RST) return Long_Long_Integer is
289 Ada.Streams.Read (Stream.all, T, L);
302 function I_LLU (Stream : access RST) return UST.Long_Long_Unsigned is
307 Ada.Streams.Read (Stream.all, T, L);
320 function I_LU (Stream : access RST) return UST.Long_Unsigned is
325 Ada.Streams.Read (Stream.all, T, L);
338 function I_SF (Stream : access RST) return Short_Float is
343 Ada.Streams.Read (Stream.all, T, L);
356 function I_SI (Stream : access RST) return Short_Integer is
361 Ada.Streams.Read (Stream.all, T, L);
374 function I_SSI (Stream : access RST) return Short_Short_Integer is
379 Ada.Streams.Read (Stream.all, T, L);
392 function I_SSU (Stream : access RST) return UST.Short_Short_Unsigned is
397 Ada.Streams.Read (Stream.all, T, L);
410 function I_SU (Stream : access RST) return UST.Short_Unsigned is
415 Ada.Streams.Read (Stream.all, T, L);
428 function I_U (Stream : access RST) return UST.Unsigned is
433 Ada.Streams.Read (Stream.all, T, L);
446 function I_WC (Stream : access RST) return Wide_Character is
451 Ada.Streams.Read (Stream.all, T, L);
464 procedure W_AD (Stream : access RST; Item : in Fat_Pointer) is
465 T : constant S_AD := From_AD (Item);
468 Ada.Streams.Write (Stream.all, T);
475 procedure W_AS (Stream : access RST; Item : in Thin_Pointer) is
476 T : constant S_AS := From_AS (Item);
479 Ada.Streams.Write (Stream.all, T);
486 procedure W_B (Stream : access RST; Item : in Boolean) is
490 T (1) := Boolean'Pos (Item);
491 Ada.Streams.Write (Stream.all, T);
498 procedure W_C (Stream : access RST; Item : in Character) is
502 T (1) := Character'Pos (Item);
503 Ada.Streams.Write (Stream.all, T);
510 procedure W_F (Stream : access RST; Item : in Float) is
511 T : constant S_F := From_F (Item);
514 Ada.Streams.Write (Stream.all, T);
521 procedure W_I (Stream : access RST; Item : in Integer) is
522 T : constant S_I := From_I (Item);
525 Ada.Streams.Write (Stream.all, T);
532 procedure W_LF (Stream : access RST; Item : in Long_Float) is
533 T : constant S_LF := From_LF (Item);
536 Ada.Streams.Write (Stream.all, T);
543 procedure W_LI (Stream : access RST; Item : in Long_Integer) is
544 T : constant S_LI := From_LI (Item);
547 Ada.Streams.Write (Stream.all, T);
554 procedure W_LLF (Stream : access RST; Item : in Long_Long_Float) is
555 T : constant S_LLF := From_LLF (Item);
558 Ada.Streams.Write (Stream.all, T);
565 procedure W_LLI (Stream : access RST; Item : in Long_Long_Integer) is
566 T : constant S_LLI := From_LLI (Item);
569 Ada.Streams.Write (Stream.all, T);
576 procedure W_LLU (Stream : access RST; Item : in UST.Long_Long_Unsigned) is
577 T : constant S_LLU := From_LLU (Item);
580 Ada.Streams.Write (Stream.all, T);
587 procedure W_LU (Stream : access RST; Item : in UST.Long_Unsigned) is
588 T : constant S_LU := From_LU (Item);
591 Ada.Streams.Write (Stream.all, T);
598 procedure W_SF (Stream : access RST; Item : in Short_Float) is
599 T : constant S_SF := From_SF (Item);
602 Ada.Streams.Write (Stream.all, T);
609 procedure W_SI (Stream : access RST; Item : in Short_Integer) is
610 T : constant S_SI := From_SI (Item);
613 Ada.Streams.Write (Stream.all, T);
620 procedure W_SSI (Stream : access RST; Item : in Short_Short_Integer) is
621 T : constant S_SSI := From_SSI (Item);
624 Ada.Streams.Write (Stream.all, T);
631 procedure W_SSU (Stream : access RST; Item : in UST.Short_Short_Unsigned) is
632 T : constant S_SSU := From_SSU (Item);
635 Ada.Streams.Write (Stream.all, T);
642 procedure W_SU (Stream : access RST; Item : in UST.Short_Unsigned) is
643 T : constant S_SU := From_SU (Item);
646 Ada.Streams.Write (Stream.all, T);
653 procedure W_U (Stream : access RST; Item : in UST.Unsigned) is
654 T : constant S_U := From_U (Item);
657 Ada.Streams.Write (Stream.all, T);
664 procedure W_WC (Stream : access RST; Item : in Wide_Character) is
665 T : constant S_WC := From_WC (Item);
668 Ada.Streams.Write (Stream.all, T);
671 end System.Stream_Attributes;