1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
|
------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . I M G _ D E C --
-- --
-- S p e c --
-- --
-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are granted --
-- additional permissions described in the GCC Runtime Library Exception, --
-- version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
-- Image for decimal fixed types where the size of the corresponding integer
-- type does not exceed Integer'Size (also used for Text_IO.Decimal_IO output)
package System.Img_Dec is
pragma Pure;
procedure Image_Decimal
(V : Integer;
S : in out String;
P : out Natural;
Scale : Integer);
-- Computes fixed_type'Image (V), where V is the integer value (in units of
-- delta) of a decimal type whose Scale is as given and stores the result
-- S (1 .. P), updating P to the value of L. The image is given by the
-- rules in RM 3.5(34) for fixed-point type image functions. The caller
-- guarantees that S is long enough to hold the result. S need not have a
-- lower bound of 1.
procedure Set_Image_Decimal
(V : Integer;
S : in out String;
P : in out Natural;
Scale : Integer;
Fore : Natural;
Aft : Natural;
Exp : Natural);
-- Sets the image of V, where V is the integer value (in units of delta)
-- of a decimal type with the given Scale, starting at S (P + 1), updating
-- P to point to the last character stored, the caller promises that the
-- buffer is large enough and no check is made for this. Constraint_Error
-- will not necessarily be raised if this requirement is violated, since
-- it is perfectly valid to compile this unit with checks off. The Fore,
-- Aft and Exp values can be set to any valid values for the case of use
-- by Text_IO.Decimal_IO. Note that there is no leading space stored.
procedure Set_Decimal_Digits
(Digs : in out String;
NDigs : Natural;
S : out String;
P : in out Natural;
Scale : Integer;
Fore : Natural;
Aft : Natural;
Exp : Natural);
-- This procedure has the same semantics as Set_Image_Decimal, except that
-- the value in Digs (1 .. NDigs) is given as a string of decimal digits
-- preceded by either a minus sign or a space (i.e. the integer image of
-- the value in units of delta). The call may destroy the value in Digs,
-- which is why Digs is in-out (this happens if rounding is required).
-- Set_Decimal_Digits is shared by all the decimal image routines.
end System.Img_Dec;
|
