1------------------------------------------------------------------------------
2--                                                                          --
3--                         GNAT RUN-TIME COMPONENTS                         --
4--                                                                          --
5--                       S Y S T E M . I M G _ I N T                        --
6--                                                                          --
7--                                 B o d y                                  --
8--                                                                          --
9--          Copyright (C) 1992-2018, Free Software Foundation, Inc.         --
10--                                                                          --
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 3,  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.                                     --
17--                                                                          --
18-- As a special exception under Section 7 of GPL version 3, you are granted --
19-- additional permissions described in the GCC Runtime Library Exception,   --
20-- version 3.1, as published by the Free Software Foundation.               --
21--                                                                          --
22-- You should have received a copy of the GNU General Public License and    --
23-- a copy of the GCC Runtime Library Exception along with this program;     --
24-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
25-- <http://www.gnu.org/licenses/>.                                          --
26--                                                                          --
27-- GNAT was originally developed  by the GNAT team at  New York University. --
28-- Extensive contributions were provided by Ada Core Technologies Inc.      --
29--                                                                          --
30------------------------------------------------------------------------------
31
32package body System.Img_Int is
33
34   procedure Set_Digits
35     (T : Integer;
36      S : in out String;
37      P : in out Natural);
38   --  Set digits of absolute value of T, which is zero or negative. We work
39   --  with the negative of the value so that the largest negative number is
40   --  not a special case.
41
42   -------------------
43   -- Image_Integer --
44   -------------------
45
46   procedure Image_Integer
47     (V : Integer;
48      S : in out String;
49      P : out Natural)
50   is
51      pragma Assert (S'First = 1);
52
53   begin
54      if V >= 0 then
55         S (1) := ' ';
56         P := 1;
57      else
58         P := 0;
59      end if;
60
61      Set_Image_Integer (V, S, P);
62   end Image_Integer;
63
64   ----------------
65   -- Set_Digits --
66   ----------------
67
68   procedure Set_Digits
69     (T : Integer;
70      S : in out String;
71      P : in out Natural)
72   is
73   begin
74      if T <= -10 then
75         Set_Digits (T / 10, S, P);
76         P := P + 1;
77         S (P) := Character'Val (48 - (T rem 10));
78      else
79         P := P + 1;
80         S (P) := Character'Val (48 - T);
81      end if;
82   end Set_Digits;
83
84   -----------------------
85   -- Set_Image_Integer --
86   -----------------------
87
88   procedure Set_Image_Integer
89     (V : Integer;
90      S : in out String;
91      P : in out Natural)
92   is
93   begin
94      if V >= 0 then
95         Set_Digits (-V, S, P);
96      else
97         P := P + 1;
98         S (P) := '-';
99         Set_Digits (V, S, P);
100      end if;
101   end Set_Image_Integer;
102
103end System.Img_Int;
104