1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME COMPONENTS --
5 -- S Y S T E M . W C H _ J I S --
9 -- Copyright (C) 1992-2007, 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, 51 Franklin Street, Fifth Floor, --
20 -- Boston, MA 02110-1301, 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 -- This package contains routines used for converting between internal
35 -- JIS codes and the two external forms we support (EUC and Shift-JIS)
37 pragma Warnings
(Off
);
41 package System
.WCh_JIS
is
44 function EUC_To_JIS
(EUC1
, EUC2
: Character) return Wide_Character;
45 -- Given the two bytes of a EUC representation, return the
46 -- corresponding JIS code wide character. Raises Constraint_Error
47 -- if the two characters are not a valid EUC encoding.
52 EUC2
: out Character);
54 -- Given a wide character in JIS form, produce the corresponding
55 -- two bytes of the EUC representation of this character. This is
56 -- only used if J is not in the normal ASCII range, i.e. on entry
57 -- we know that Wide_Character'Pos (J) >= 16#0080# and that we
58 -- thus require a two byte EUC representation (ASCII codes appear
59 -- unchanged as a single byte in EUC). No error checking is performed,
60 -- the input code is assumed to be in an appropriate range.
62 procedure JIS_To_Shift_JIS
66 -- Given a wide character code in JIS form, produce the corresponding
67 -- two bytes of the Shift-JIS representation of this character. This
68 -- is only used if J is not in the normal ASCII range, i.e. on entry
69 -- we know that Wide_Character'Pos (J) >= 16#0080# and that we
70 -- thus require a two byte EUC representation (ASCII codes appear
71 -- unchanged as a single byte in EUC). No error checking is performed,
72 -- the input code is assumed to be in an appropriate range (note in
73 -- particular that input codes in the range 16#0080#-16#00FF#, i.e.
74 -- Hankaku Kana, do not appear, since Shift JIS has no representation
77 function Shift_JIS_To_JIS
(SJ1
, SJ2
: Character) return Wide_Character;
78 -- Given the two bytes of a Shift-JIS representation, return the
79 -- corresponding JIS code wide character. Raises Constraint_Error if
80 -- the two characters are not a valid shift-JIS encoding.