1 ------------------------------------------------------------------------------
3 -- GNAT RUNTIME COMPONENTS --
5 -- S Y S T E M . W C H _ W T S --
10 -- Copyright (C) 1992-2000 Free Software Foundation, Inc. --
12 -- GNAT is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 2, or (at your option) any later ver- --
15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNAT; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, USA. --
23 -- As a special exception, if other files instantiate generics from this --
24 -- unit, or you link this unit with other files to produce an executable, --
25 -- this unit does not by itself cause the resulting executable to be --
26 -- covered by the GNU General Public License. This exception does not --
27 -- however invalidate any other reasons why the executable file might be --
28 -- covered by the GNU Public License. --
30 -- GNAT was originally developed by the GNAT team at New York University. --
31 -- Extensive contributions were provided by Ada Core Technologies Inc. --
33 ------------------------------------------------------------------------------
35 with Interfaces
; use Interfaces
;
36 with System
.WCh_Con
; use System
.WCh_Con
;
37 with System
.WCh_JIS
; use System
.WCh_JIS
;
39 package body System
.WCh_WtS
is
41 ---------------------------
42 -- Wide_String_To_String --
43 ---------------------------
45 function Wide_String_To_String
47 EM
: WC_Encoding_Method
)
50 R
: String (1 .. 5 * S
'Length); -- worst case length!
58 for SP
in S
'Range loop
60 C
: constant Wide_Character := S
(SP
);
61 CV
: constant Unsigned_16
:= Wide_Character'Pos (C
);
62 Hex
: constant array (Unsigned_16
range 0 .. 15) of Character :=
68 R
(RP
) := Character'Val (CV
);
73 -- Hex ESC sequence encoding
78 R
(RP
) := Character'Val (CV
);
81 R
(RP
+ 1) := ASCII
.ESC
;
82 R
(RP
+ 2) := Hex
(Shift_Right
(CV
, 12));
83 R
(RP
+ 3) := Hex
(Shift_Right
(CV
, 8) and 16#
000F#
);
84 R
(RP
+ 4) := Hex
(Shift_Right
(CV
, 4) and 16#
000F#
);
85 R
(RP
+ 5) := Hex
(CV
and 16#
000F#
);
89 -- Upper bit shift (internal code = external code)
92 R
(RP
+ 1) := Character'Val (Shift_Right
(CV
, 8));
93 R
(RP
+ 2) := Character'Val (CV
and 16#FF#
);
96 -- Upper bit shift (EUC)
99 JIS_To_EUC
(C
, C1
, C2
);
104 -- Upper bit shift (Shift-JIS)
106 when WCEM_Shift_JIS
=>
107 JIS_To_Shift_JIS
(C
, C1
, C2
);
112 -- Upper bit shift (UTF-8)
114 -- 16#0080#-16#07ff#: 2#110xxxxx# 2#10xxxxxx#
115 -- 16#0800#-16#ffff#: 2#1110xxxx# 2#10xxxxxx# 2#10xxxxxx#
118 if CV
< 16#
0800#
then
120 Character'Val (2#
11000000#
or Shift_Right
(CV
, 6));
122 Character'Val (2#
10000000#
or (CV
and 2#
00111111#
));
127 Character'Val (2#
11100000#
or Shift_Right
(CV
, 12));
129 Character'Val (2#
10000000#
or
130 (Shift_Right
(CV
, 6) and
133 Character'Val (2#
10000000#
or (CV
and 2#
00111111#
));
139 when WCEM_Brackets
=>
142 R
(RP
) := Character'Val (CV
);
147 R
(RP
+ 3) := Hex
(Shift_Right
(CV
, 12));
148 R
(RP
+ 4) := Hex
(Shift_Right
(CV
, 8) and 16#
000F#
);
149 R
(RP
+ 5) := Hex
(Shift_Right
(CV
, 4) and 16#
000F#
);
150 R
(RP
+ 6) := Hex
(CV
and 16#
000F#
);
162 end Wide_String_To_String
;