Mercurial > hg > CbC > CbC_gcc
comparison gcc/ada/libgnat/s-imgllw.adb @ 111:04ced10e8804
gcc 7
author | kono |
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date | Fri, 27 Oct 2017 22:46:09 +0900 |
parents | |
children | 84e7813d76e9 |
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68:561a7518be6b | 111:04ced10e8804 |
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1 ------------------------------------------------------------------------------ | |
2 -- -- | |
3 -- GNAT RUN-TIME COMPONENTS -- | |
4 -- -- | |
5 -- S Y S T E M . I M G _ L L W -- | |
6 -- -- | |
7 -- B o d y -- | |
8 -- -- | |
9 -- Copyright (C) 1992-2017, 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 | |
32 with System.Unsigned_Types; use System.Unsigned_Types; | |
33 | |
34 package body System.Img_LLW is | |
35 | |
36 --------------------------------------- | |
37 -- Set_Image_Width_Long_Long_Integer -- | |
38 --------------------------------------- | |
39 | |
40 procedure Set_Image_Width_Long_Long_Integer | |
41 (V : Long_Long_Integer; | |
42 W : Integer; | |
43 S : out String; | |
44 P : in out Natural) | |
45 is | |
46 Start : Natural; | |
47 | |
48 begin | |
49 -- Positive case can just use the unsigned circuit directly | |
50 | |
51 if V >= 0 then | |
52 Set_Image_Width_Long_Long_Unsigned | |
53 (Long_Long_Unsigned (V), W, S, P); | |
54 | |
55 -- Negative case has to set a minus sign. Note also that we have to be | |
56 -- careful not to generate overflow with the largest negative number. | |
57 | |
58 else | |
59 P := P + 1; | |
60 S (P) := ' '; | |
61 Start := P; | |
62 | |
63 declare | |
64 pragma Suppress (Overflow_Check); | |
65 pragma Suppress (Range_Check); | |
66 begin | |
67 Set_Image_Width_Long_Long_Unsigned | |
68 (Long_Long_Unsigned (-V), W - 1, S, P); | |
69 end; | |
70 | |
71 -- Set minus sign in last leading blank location. Because of the | |
72 -- code above, there must be at least one such location. | |
73 | |
74 while S (Start + 1) = ' ' loop | |
75 Start := Start + 1; | |
76 end loop; | |
77 | |
78 S (Start) := '-'; | |
79 end if; | |
80 | |
81 end Set_Image_Width_Long_Long_Integer; | |
82 | |
83 ---------------------------------------- | |
84 -- Set_Image_Width_Long_Long_Unsigned -- | |
85 ---------------------------------------- | |
86 | |
87 procedure Set_Image_Width_Long_Long_Unsigned | |
88 (V : Long_Long_Unsigned; | |
89 W : Integer; | |
90 S : out String; | |
91 P : in out Natural) | |
92 is | |
93 Start : constant Natural := P; | |
94 F, T : Natural; | |
95 | |
96 procedure Set_Digits (T : Long_Long_Unsigned); | |
97 -- Set digits of absolute value of T | |
98 | |
99 ---------------- | |
100 -- Set_Digits -- | |
101 ---------------- | |
102 | |
103 procedure Set_Digits (T : Long_Long_Unsigned) is | |
104 begin | |
105 if T >= 10 then | |
106 Set_Digits (T / 10); | |
107 P := P + 1; | |
108 S (P) := Character'Val (T mod 10 + Character'Pos ('0')); | |
109 else | |
110 P := P + 1; | |
111 S (P) := Character'Val (T + Character'Pos ('0')); | |
112 end if; | |
113 end Set_Digits; | |
114 | |
115 -- Start of processing for Set_Image_Width_Long_Long_Unsigned | |
116 | |
117 begin | |
118 Set_Digits (V); | |
119 | |
120 -- Add leading spaces if required by width parameter | |
121 | |
122 if P - Start < W then | |
123 F := P; | |
124 P := P + (W - (P - Start)); | |
125 T := P; | |
126 | |
127 while F > Start loop | |
128 S (T) := S (F); | |
129 T := T - 1; | |
130 F := F - 1; | |
131 end loop; | |
132 | |
133 for J in Start + 1 .. T loop | |
134 S (J) := ' '; | |
135 end loop; | |
136 end if; | |
137 | |
138 end Set_Image_Width_Long_Long_Unsigned; | |
139 | |
140 end System.Img_LLW; |