1 ------------------------------------------------------------------------------
3 -- GNAT RUNTIME COMPONENTS --
5 -- S Y S T E M . W C H _ W T S --
9 -- Copyright (C) 1992-2000 Free Software Foundation, Inc. --
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 2, 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. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNAT; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNAT was originally developed by the GNAT team at New York University. --
30 -- Extensive contributions were provided by Ada Core Technologies Inc. --
32 ------------------------------------------------------------------------------
34 with Interfaces
; use Interfaces
;
35 with System
.WCh_Con
; use System
.WCh_Con
;
36 with System
.WCh_JIS
; use System
.WCh_JIS
;
38 package body System
.WCh_WtS
is
40 ---------------------------
41 -- Wide_String_To_String --
42 ---------------------------
44 function Wide_String_To_String
46 EM
: WC_Encoding_Method
)
49 R
: String (1 .. 5 * S
'Length); -- worst case length!
57 for SP
in S
'Range loop
59 C
: constant Wide_Character := S
(SP
);
60 CV
: constant Unsigned_16
:= Wide_Character'Pos (C
);
61 Hex
: constant array (Unsigned_16
range 0 .. 15) of Character :=
67 R
(RP
) := Character'Val (CV
);
72 -- Hex ESC sequence encoding
77 R
(RP
) := Character'Val (CV
);
80 R
(RP
+ 1) := ASCII
.ESC
;
81 R
(RP
+ 2) := Hex
(Shift_Right
(CV
, 12));
82 R
(RP
+ 3) := Hex
(Shift_Right
(CV
, 8) and 16#
000F#
);
83 R
(RP
+ 4) := Hex
(Shift_Right
(CV
, 4) and 16#
000F#
);
84 R
(RP
+ 5) := Hex
(CV
and 16#
000F#
);
88 -- Upper bit shift (internal code = external code)
91 R
(RP
+ 1) := Character'Val (Shift_Right
(CV
, 8));
92 R
(RP
+ 2) := Character'Val (CV
and 16#FF#
);
95 -- Upper bit shift (EUC)
98 JIS_To_EUC
(C
, C1
, C2
);
103 -- Upper bit shift (Shift-JIS)
105 when WCEM_Shift_JIS
=>
106 JIS_To_Shift_JIS
(C
, C1
, C2
);
111 -- Upper bit shift (UTF-8)
113 -- 16#0080#-16#07ff#: 2#110xxxxx# 2#10xxxxxx#
114 -- 16#0800#-16#ffff#: 2#1110xxxx# 2#10xxxxxx# 2#10xxxxxx#
117 if CV
< 16#
0800#
then
119 Character'Val (2#
11000000#
or Shift_Right
(CV
, 6));
121 Character'Val (2#
10000000#
or (CV
and 2#
00111111#
));
126 Character'Val (2#
11100000#
or Shift_Right
(CV
, 12));
128 Character'Val (2#
10000000#
or
129 (Shift_Right
(CV
, 6) and
132 Character'Val (2#
10000000#
or (CV
and 2#
00111111#
));
138 when WCEM_Brackets
=>
141 R
(RP
) := Character'Val (CV
);
146 R
(RP
+ 3) := Hex
(Shift_Right
(CV
, 12));
147 R
(RP
+ 4) := Hex
(Shift_Right
(CV
, 8) and 16#
000F#
);
148 R
(RP
+ 5) := Hex
(Shift_Right
(CV
, 4) and 16#
000F#
);
149 R
(RP
+ 6) := Hex
(CV
and 16#
000F#
);
161 end Wide_String_To_String
;