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
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- S Y S T E M . C A S E _ U T I L _ N S S --
-- --
-- S p e c --
-- --
-- Copyright (C) 1995-2025, 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. --
-- --
------------------------------------------------------------------------------
-- The No_Secondary_Stack portion of System.Case_Util. Some of the functions
-- provided in System.Case_Util make use of the secondary stack, and some
-- do not. Lumping them all together makes even the non-secondary-stack
-- portion of the package unusable in cases where references to
-- secondary-stack-related code must be avoided (for example, if linking with
-- a reduced version of the runtimes where that code is missing). That's a
-- problem in some cases, so Case_Util is split into two parts. The first
-- part (named Case_Util_NSS) is a subset of the original version which
-- does not use the secondary stack; the second part presents the same
-- complete interface to users as before, but avoids code duplication by
-- renaming entities out of the first part.
--
-- See comments in s-casuti.ads for further explanations (e.g., of
-- the Assertion_Policy specified here).
pragma Assertion_Policy (Pre => Ignore,
Post => Ignore,
Contract_Cases => Ignore,
Ghost => Ignore);
package System.Case_Util_NSS
with Pure, SPARK_Mode
is
-- Note: all the following functions handle the full Latin-1 set
function To_Upper (A : Character) return Character
with
Post => (declare
A_Val : constant Natural := Character'Pos (A);
begin
(if A in 'a' .. 'z'
or else A_Val in 16#E0# .. 16#F6#
or else A_Val in 16#F8# .. 16#FE#
then
To_Upper'Result = Character'Val (A_Val - 16#20#)
else
To_Upper'Result = A));
-- Converts A to upper case if it is a lower case letter, otherwise
-- returns the input argument unchanged.
procedure To_Upper (A : in out String)
with
Post => (for all J in A'Range => A (J) = To_Upper (A'Old (J)));
function To_Lower (A : Character) return Character
with
Post => (declare
A_Val : constant Natural := Character'Pos (A);
begin
(if A in 'A' .. 'Z'
or else A_Val in 16#C0# .. 16#D6#
or else A_Val in 16#D8# .. 16#DE#
then
To_Lower'Result = Character'Val (A_Val + 16#20#)
else
To_Lower'Result = A));
-- Converts A to lower case if it is an upper case letter, otherwise
-- returns the input argument unchanged.
procedure To_Lower (A : in out String)
with
Post => (for all J in A'Range => A (J) = To_Lower (A'Old (J)));
procedure To_Mixed (A : in out String)
with
Post =>
(for all J in A'Range =>
(if J = A'First
or else A'Old (J - 1) = '_'
then
A (J) = To_Upper (A'Old (J))
else
A (J) = To_Lower (A'Old (J))));
end System.Case_Util_NSS;
|
