Daily bump.
[official-gcc.git] / gcc / ada / s-imgllb.adb
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1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT RUN-TIME COMPONENTS --
4 -- --
5 -- S Y S T E M . I M G _ L L B --
6 -- --
7 -- B o d y --
8 -- --
9 -- Copyright (C) 1992-2009 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 ------------------------------------------------------------------------------
32 with System.Unsigned_Types; use System.Unsigned_Types;
34 package body System.Img_LLB is
36 ---------------------------------------
37 -- Set_Image_Based_Long_Long_Integer --
38 ---------------------------------------
40 procedure Set_Image_Based_Long_Long_Integer
41 (V : Long_Long_Integer;
42 B : Natural;
43 W : Integer;
44 S : out String;
45 P : in out Natural)
47 Start : Natural;
49 begin
50 -- Positive case can just use the unsigned circuit directly
52 if V >= 0 then
53 Set_Image_Based_Long_Long_Unsigned
54 (Long_Long_Unsigned (V), B, W, S, P);
56 -- Negative case has to set a minus sign. Note also that we have to be
57 -- careful not to generate overflow with the largest negative number.
59 else
60 P := P + 1;
61 S (P) := ' ';
62 Start := P;
64 declare
65 pragma Suppress (Overflow_Check);
66 pragma Suppress (Range_Check);
67 begin
68 Set_Image_Based_Long_Long_Unsigned
69 (Long_Long_Unsigned (-V), B, W - 1, S, P);
70 end;
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
76 Start := Start + 1;
77 end loop;
79 S (Start) := '-';
80 end if;
82 end Set_Image_Based_Long_Long_Integer;
84 ----------------------------------------
85 -- Set_Image_Based_Long_Long_Unsigned --
86 ----------------------------------------
88 procedure Set_Image_Based_Long_Long_Unsigned
89 (V : Long_Long_Unsigned;
90 B : Natural;
91 W : Integer;
92 S : out String;
93 P : in out Natural)
95 Start : constant Natural := P;
96 F, T : Natural;
97 BU : constant Long_Long_Unsigned := Long_Long_Unsigned (B);
98 Hex : constant array
99 (Long_Long_Unsigned range 0 .. 15) of Character :=
100 "0123456789ABCDEF";
102 procedure Set_Digits (T : Long_Long_Unsigned);
103 -- Set digits of absolute value of T
105 procedure Set_Digits (T : Long_Long_Unsigned) is
106 begin
107 if T >= BU then
108 Set_Digits (T / BU);
109 P := P + 1;
110 S (P) := Hex (T mod BU);
111 else
112 P := P + 1;
113 S (P) := Hex (T);
114 end if;
115 end Set_Digits;
117 -- Start of processing for Set_Image_Based_Long_Long_Unsigned
119 begin
121 if B >= 10 then
122 P := P + 1;
123 S (P) := '1';
124 end if;
126 P := P + 1;
127 S (P) := Character'Val (Character'Pos ('0') + B mod 10);
129 P := P + 1;
130 S (P) := '#';
132 Set_Digits (V);
134 P := P + 1;
135 S (P) := '#';
137 -- Add leading spaces if required by width parameter
139 if P - Start < W then
140 F := P;
141 P := Start + W;
142 T := P;
144 while F > Start loop
145 S (T) := S (F);
146 T := T - 1;
147 F := F - 1;
148 end loop;
150 for J in Start + 1 .. T loop
151 S (J) := ' ';
152 end loop;
153 end if;
155 end Set_Image_Based_Long_Long_Unsigned;
157 end System.Img_LLB;