File : s-imgint.adb
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) 1992-2015, 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 -- --
19 -- --
20 -- --
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
32 package 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
103 end System.Img_Int;