1 ------------------------------------------------------------------------------
3 -- GNAT RUNTIME COMPONENTS --
5 -- S Y S T E M . I M G _ W I U --
10 -- Copyright (C) 1992,1993,1994,1995 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 -- It is now maintained by Ada Core Technologies Inc (http://www.gnat.com). --
33 ------------------------------------------------------------------------------
35 with System.Unsigned_Types; use System.Unsigned_Types;
37 package body System.Img_WIU is
39 -----------------------------
40 -- Set_Image_Width_Integer --
41 -----------------------------
43 procedure Set_Image_Width_Integer
52 -- Positive case can just use the unsigned circuit directly
55 Set_Image_Width_Unsigned (Unsigned (V), W, S, P);
57 -- Negative case has to set a minus sign. Note also that we have to be
58 -- careful not to generate overflow with the largest negative number.
66 pragma Suppress (Overflow_Check);
67 pragma Suppress (Range_Check);
69 Set_Image_Width_Unsigned (Unsigned (-V), W - 1, S, P);
72 -- Set minus sign in last leading blank location. Because of the
73 -- code above, there must be at least one such location.
75 while S (Start + 1) = ' ' loop
82 end Set_Image_Width_Integer;
84 ------------------------------
85 -- Set_Image_Width_Unsigned --
86 ------------------------------
88 procedure Set_Image_Width_Unsigned
94 Start : constant Natural := P;
97 procedure Set_Digits (T : Unsigned);
98 -- Set digits of absolute value of T
100 procedure Set_Digits (T : Unsigned) is
105 S (P) := Character'Val (T mod 10 + Character'Pos ('0'));
108 S (P) := Character'Val (T + Character'Pos ('0'));
112 -- Start of processing for Set_Image_Width_Unsigned
117 -- Add leading spaces if required by width parameter
119 if P - Start < W then
121 P := P + (W - (P - Start));
130 for J in Start + 1 .. T loop
135 end Set_Image_Width_Unsigned;