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
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
-- --
-- package Copyright (c) Dmitry A. Kazakov --
-- Strings_Edit.UTF8.Handling Luebeck --
-- Implementation Spring, 2005 --
-- --
-- Last revision : 10:11 25 Jun 2005 --
-- --
-- This library is free software; you can redistribute it and/or --
-- modify it under the terms of the GNU General Public License as --
-- published by the Free Software Foundation; either version 2 of --
-- the License, or (at your option) any later version. This library --
-- is distributed in the hope that it will be useful, but WITHOUT --
-- ANY WARRANTY; without even the implied warranty of --
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU --
-- General Public License for more details. You should have --
-- received a copy of the GNU General Public License along with --
-- this library; if not, write to the Free Software Foundation, --
-- Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. --
-- --
-- --
-- --
-- --
-- --
-- --
-- --
--____________________________________________________________________--
package body Strings_Edit.UTF8.Handling is
function To_UTF8 (Value : Character) return String is
Result : String (1..2);
Pointer : Integer := Result'First;
begin
Put (Result, Pointer, UTF8_Code_Point (Character'Pos (Value)));
return Result (1..Pointer - 1);
end To_UTF8;
function To_UTF8 (Value : String) return String is
Result : String (1..Value'Length * 2);
Pointer : Integer := Result'First;
begin
for Item in Value'Range loop
Put
( Result,
Pointer,
UTF8_Code_Point (Character'Pos (Value (Item)))
);
end loop;
return Result (Result'First..Pointer - 1);
end To_UTF8;
function To_UTF8 (Value : Wide_Character) return String is
Result : String (1..3);
Pointer : Integer := Result'First;
begin
Put
( Result,
Pointer,
UTF8_Code_Point (Wide_Character'Pos (Value))
);
return Result (1..Pointer - 1);
end To_UTF8;
function To_UTF8 (Value : Wide_String) return String is
Result : String (1..Value'Length * 3);
Pointer : Integer := Result'First;
begin
for Item in Value'Range loop
Put
( Result,
Pointer,
UTF8_Code_Point (Wide_Character'Pos (Value (Item)))
);
end loop;
return Result (Result'First..Pointer - 1);
end To_UTF8;
function To_String (Value : String) return String is
Result : String (1..Value'Length);
Pointer : Integer := Value'First;
Index : Integer := Result'First;
Item : UTF8_Code_Point;
begin
while Pointer <= Value'Last loop
Get (Value, Pointer, Item);
if Item > 16#FF# then
raise Constraint_Error;
end if;
Result (Index) := Character'Val (Item);
Index := Index + 1;
end loop;
return Result (Result'First..Index - 1);
end To_String;
function To_String
( Value : String;
Substitute : Character
) return String is
Result : String (1..Value'Length);
Pointer : Integer := Value'First;
Index : Integer := Result'First;
Item : UTF8_Code_Point;
begin
while Pointer <= Value'Last loop
Get (Value, Pointer, Item);
if Item > 16#FF# then
Result (Index) := Substitute;
else
Result (Index) := Character'Val (Item);
end if;
Index := Index + 1;
end loop;
return Result (Result'First..Index - 1);
end To_String;
function To_Wide_String (Value : String) return Wide_String is
Result : Wide_String (1..Value'Length);
Pointer : Integer := Value'First;
Index : Integer := Result'First;
Item : UTF8_Code_Point;
begin
while Pointer <= Value'Last loop
Get (Value, Pointer, Item);
if Item > 16#FFFF# then
raise Constraint_Error;
end if;
Result (Index) := Wide_Character'Val (Item);
Index := Index + 1;
end loop;
return Result (Result'First..Index - 1);
end To_Wide_String;
function To_Wide_String
( Value : String;
Substitute : Wide_Character
) return Wide_String is
Result : Wide_String (1..Value'Length);
Pointer : Integer := Value'First;
Index : Integer := Result'First;
Item : UTF8_Code_Point;
begin
while Pointer <= Value'Last loop
Get (Value, Pointer, Item);
if Item > 16#FFFF# then
Result (Index) := Substitute;
else
Result (Index) := Wide_Character'Val (Item);
end if;
Index := Index + 1;
end loop;
return Result (Result'First..Index - 1);
end To_Wide_String;
end Strings_Edit.UTF8.Handling;
|
