1 ------------------------------------------------------------------------------
3 -- GNAT RUNTIME COMPONENTS --
5 -- S Y S T E M . I M G _ B I U --
11 -- Copyright (C) 1992,1993,1994,1995 Free Software Foundation, Inc. --
13 -- GNAT is free software; you can redistribute it and/or modify it under --
14 -- terms of the GNU General Public License as published by the Free Soft- --
15 -- ware Foundation; either version 2, or (at your option) any later ver- --
16 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
17 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
18 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
19 -- for more details. You should have received a copy of the GNU General --
20 -- Public License distributed with GNAT; see file COPYING. If not, write --
21 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
22 -- MA 02111-1307, USA. --
24 -- As a special exception, if other files instantiate generics from this --
25 -- unit, or you link this unit with other files to produce an executable, --
26 -- this unit does not by itself cause the resulting executable to be --
27 -- covered by the GNU General Public License. This exception does not --
28 -- however invalidate any other reasons why the executable file might be --
29 -- covered by the GNU Public License. --
31 -- GNAT was originally developed by the GNAT team at New York University. --
32 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
34 ------------------------------------------------------------------------------
36 with System
.Unsigned_Types
; use System
.Unsigned_Types
;
38 package body System
.Img_BIU
is
40 -----------------------------
41 -- Set_Image_Based_Integer --
42 -----------------------------
44 procedure Set_Image_Based_Integer
54 -- Positive case can just use the unsigned circuit directly
57 Set_Image_Based_Unsigned
(Unsigned
(V
), B
, W
, S
, P
);
59 -- Negative case has to set a minus sign. Note also that we have to be
60 -- careful not to generate overflow with the largest negative number.
68 pragma Suppress
(Overflow_Check
);
69 pragma Suppress
(Range_Check
);
71 Set_Image_Based_Unsigned
(Unsigned
(-V
), B
, W
- 1, S
, P
);
74 -- Set minus sign in last leading blank location. Because of the
75 -- code above, there must be at least one such location.
77 while S
(Start
+ 1) = ' ' loop
84 end Set_Image_Based_Integer
;
86 ------------------------------
87 -- Set_Image_Based_Unsigned --
88 ------------------------------
90 procedure Set_Image_Based_Unsigned
97 Start
: constant Natural := P
;
99 BU
: constant Unsigned
:= Unsigned
(B
);
101 (Unsigned
range 0 .. 15) of Character := "0123456789ABCDEF";
103 procedure Set_Digits
(T
: Unsigned
);
104 -- Set digits of absolute value of T
106 procedure Set_Digits
(T
: Unsigned
) is
111 S
(P
) := Hex
(T
mod BU
);
118 -- Start of processing for Set_Image_Based_Unsigned
128 S
(P
) := Character'Val (Character'Pos ('0') + B
mod 10);
138 -- Add leading spaces if required by width parameter
140 if P
- Start
< W
then
151 for J
in Start
+ 1 .. T
loop
156 end Set_Image_Based_Unsigned
;