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 --
9 -- Copyright (C) 1992-1998, 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 AI195-00132
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_C is new UC (Character, S_C);
83 function From_F is new UC (Float, S_F);
84 function From_I is new UC (Integer, S_I);
85 function From_LF is new UC (Long_Float, S_LF);
86 function From_LI is new UC (Long_Integer, S_LI);
87 function From_LLF is new UC (Long_Long_Float, S_LLF);
88 function From_LLI is new UC (Long_Long_Integer, S_LLI);
89 function From_LLU is new UC (UST.Long_Long_Unsigned, S_LLU);
90 function From_LU is new UC (UST.Long_Unsigned, S_LU);
91 function From_SF is new UC (Short_Float, S_SF);
92 function From_SI is new UC (Short_Integer, S_SI);
93 function From_SSI is new UC (Short_Short_Integer, S_SSI);
94 function From_SSU is new UC (UST.Short_Short_Unsigned, S_SSU);
95 function From_SU is new UC (UST.Short_Unsigned, S_SU);
96 function From_U is new UC (UST.Unsigned, S_U);
97 function From_WC is new UC (Wide_Character, S_WC);
99 -- Unchecked conversions from the stream type to elementary type
101 function To_AD is new UC (S_AD, Fat_Pointer);
102 function To_AS is new UC (S_AS, Thin_Pointer);
103 function To_C is new UC (S_C, Character);
104 function To_F is new UC (S_F, Float);
105 function To_I is new UC (S_I, Integer);
106 function To_LF is new UC (S_LF, Long_Float);
107 function To_LI is new UC (S_LI, Long_Integer);
108 function To_LLF is new UC (S_LLF, Long_Long_Float);
109 function To_LLI is new UC (S_LLI, Long_Long_Integer);
110 function To_LLU is new UC (S_LLU, UST.Long_Long_Unsigned);
111 function To_LU is new UC (S_LU, UST.Long_Unsigned);
112 function To_SF is new UC (S_SF, Short_Float);
113 function To_SI is new UC (S_SI, Short_Integer);
114 function To_SSI is new UC (S_SSI, Short_Short_Integer);
115 function To_SSU is new UC (S_SSU, UST.Short_Short_Unsigned);
116 function To_SU is new UC (S_SU, UST.Short_Unsigned);
117 function To_U is new UC (S_U, UST.Unsigned);
118 function To_WC is new UC (S_WC, Wide_Character);
124 function I_AD (Stream : access RST) return Fat_Pointer is
129 Ada.Streams.Read (Stream.all, T, L);
142 function I_AS (Stream : access RST) return Thin_Pointer is
147 Ada.Streams.Read (Stream.all, T, L);
160 function I_B (Stream : access RST) return Boolean is
165 Ada.Streams.Read (Stream.all, T, L);
170 return Boolean'Val (T (1));
178 function I_C (Stream : access RST) return Character is
183 Ada.Streams.Read (Stream.all, T, L);
196 function I_F (Stream : access RST) return Float is
201 Ada.Streams.Read (Stream.all, T, L);
214 function I_I (Stream : access RST) return Integer is
219 Ada.Streams.Read (Stream.all, T, L);
232 function I_LF (Stream : access RST) return Long_Float is
237 Ada.Streams.Read (Stream.all, T, L);
250 function I_LI (Stream : access RST) return Long_Integer is
255 Ada.Streams.Read (Stream.all, T, L);
268 function I_LLF (Stream : access RST) return Long_Long_Float is
273 Ada.Streams.Read (Stream.all, T, L);
286 function I_LLI (Stream : access RST) return Long_Long_Integer is
291 Ada.Streams.Read (Stream.all, T, L);
304 function I_LLU (Stream : access RST) return UST.Long_Long_Unsigned is
309 Ada.Streams.Read (Stream.all, T, L);
322 function I_LU (Stream : access RST) return UST.Long_Unsigned is
327 Ada.Streams.Read (Stream.all, T, L);
340 function I_SF (Stream : access RST) return Short_Float is
345 Ada.Streams.Read (Stream.all, T, L);
358 function I_SI (Stream : access RST) return Short_Integer is
363 Ada.Streams.Read (Stream.all, T, L);
376 function I_SSI (Stream : access RST) return Short_Short_Integer is
381 Ada.Streams.Read (Stream.all, T, L);
394 function I_SSU (Stream : access RST) return UST.Short_Short_Unsigned is
399 Ada.Streams.Read (Stream.all, T, L);
412 function I_SU (Stream : access RST) return UST.Short_Unsigned is
417 Ada.Streams.Read (Stream.all, T, L);
430 function I_U (Stream : access RST) return UST.Unsigned is
435 Ada.Streams.Read (Stream.all, T, L);
448 function I_WC (Stream : access RST) return Wide_Character is
453 Ada.Streams.Read (Stream.all, T, L);
466 procedure W_AD (Stream : access RST; Item : in Fat_Pointer) is
467 T : constant S_AD := From_AD (Item);
470 Ada.Streams.Write (Stream.all, T);
477 procedure W_AS (Stream : access RST; Item : in Thin_Pointer) is
478 T : constant S_AS := From_AS (Item);
481 Ada.Streams.Write (Stream.all, T);
488 procedure W_B (Stream : access RST; Item : in Boolean) is
492 T (1) := Boolean'Pos (Item);
493 Ada.Streams.Write (Stream.all, T);
500 procedure W_C (Stream : access RST; Item : in Character) is
501 T : constant S_C := From_C (Item);
504 Ada.Streams.Write (Stream.all, T);
511 procedure W_F (Stream : access RST; Item : in Float) is
512 T : constant S_F := From_F (Item);
515 Ada.Streams.Write (Stream.all, T);
522 procedure W_I (Stream : access RST; Item : in Integer) is
523 T : constant S_I := From_I (Item);
526 Ada.Streams.Write (Stream.all, T);
533 procedure W_LF (Stream : access RST; Item : in Long_Float) is
534 T : constant S_LF := From_LF (Item);
537 Ada.Streams.Write (Stream.all, T);
544 procedure W_LI (Stream : access RST; Item : in Long_Integer) is
545 T : constant S_LI := From_LI (Item);
548 Ada.Streams.Write (Stream.all, T);
555 procedure W_LLF (Stream : access RST; Item : in Long_Long_Float) is
556 T : constant S_LLF := From_LLF (Item);
559 Ada.Streams.Write (Stream.all, T);
566 procedure W_LLI (Stream : access RST; Item : in Long_Long_Integer) is
567 T : constant S_LLI := From_LLI (Item);
570 Ada.Streams.Write (Stream.all, T);
577 procedure W_LLU (Stream : access RST; Item : in UST.Long_Long_Unsigned) is
578 T : constant S_LLU := From_LLU (Item);
581 Ada.Streams.Write (Stream.all, T);
588 procedure W_LU (Stream : access RST; Item : in UST.Long_Unsigned) is
589 T : constant S_LU := From_LU (Item);
592 Ada.Streams.Write (Stream.all, T);
599 procedure W_SF (Stream : access RST; Item : in Short_Float) is
600 T : constant S_SF := From_SF (Item);
603 Ada.Streams.Write (Stream.all, T);
610 procedure W_SI (Stream : access RST; Item : in Short_Integer) is
611 T : constant S_SI := From_SI (Item);
614 Ada.Streams.Write (Stream.all, T);
621 procedure W_SSI (Stream : access RST; Item : in Short_Short_Integer) is
622 T : constant S_SSI := From_SSI (Item);
625 Ada.Streams.Write (Stream.all, T);
632 procedure W_SSU (Stream : access RST; Item : in UST.Short_Short_Unsigned) is
633 T : constant S_SSU := From_SSU (Item);
636 Ada.Streams.Write (Stream.all, T);
643 procedure W_SU (Stream : access RST; Item : in UST.Short_Unsigned) is
644 T : constant S_SU := From_SU (Item);
647 Ada.Streams.Write (Stream.all, T);
654 procedure W_U (Stream : access RST; Item : in UST.Unsigned) is
655 T : constant S_U := From_U (Item);
658 Ada.Streams.Write (Stream.all, T);
665 procedure W_WC (Stream : access RST; Item : in Wide_Character) is
666 T : constant S_WC := From_WC (Item);
669 Ada.Streams.Write (Stream.all, T);
672 end System.Stream_Attributes;