File : s-wchjis.ads
1 ------------------------------------------------------------------------------
2 -- --
3 -- GNAT RUN-TIME COMPONENTS --
4 -- --
5 -- S Y S T E M . W C H _ J I S --
6 -- --
7 -- S p e c --
8 -- --
9 -- Copyright (C) 1992-2013, Free Software Foundation, Inc. --
10 -- --
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 3, 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. --
17 -- --
18 -- --
19 -- --
20 -- --
21 -- --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
26 -- --
27 -- GNAT was originally developed by the GNAT team at New York University. --
28 -- Extensive contributions were provided by Ada Core Technologies Inc. --
29 -- --
30 ------------------------------------------------------------------------------
31
32 -- This package contains routines used for converting between internal
33 -- JIS codes and the two external forms we support (EUC and Shift-JIS)
34
35 pragma Compiler_Unit_Warning;
36
37 package System.WCh_JIS is
38 pragma Pure;
39
40 function EUC_To_JIS (EUC1, EUC2 : Character) return Wide_Character;
41 -- Given the two bytes of a EUC representation, return the
42 -- corresponding JIS code wide character. Raises Constraint_Error
43 -- if the two characters are not a valid EUC encoding.
44
45 procedure JIS_To_EUC
46 (J : Wide_Character;
47 EUC1 : out Character;
48 EUC2 : out Character);
49
50 -- Given a wide character in JIS form, produce the corresponding
51 -- two bytes of the EUC representation of this character. This is
52 -- only used if J is not in the normal ASCII range, i.e. on entry
53 -- we know that Wide_Character'Pos (J) >= 16#0080# and that we
54 -- thus require a two byte EUC representation (ASCII codes appear
55 -- unchanged as a single byte in EUC). No error checking is performed,
56 -- the input code is assumed to be in an appropriate range.
57
58 procedure JIS_To_Shift_JIS
59 (J : Wide_Character;
60 SJ1 : out Character;
61 SJ2 : out Character);
62 -- Given a wide character code in JIS form, produce the corresponding
63 -- two bytes of the Shift-JIS representation of this character. This
64 -- is only used if J is not in the normal ASCII range, i.e. on entry
65 -- we know that Wide_Character'Pos (J) >= 16#0080# and that we
66 -- thus require a two byte EUC representation (ASCII codes appear
67 -- unchanged as a single byte in EUC). No error checking is performed,
68 -- the input code is assumed to be in an appropriate range (note in
69 -- particular that input codes in the range 16#0080#-16#00FF#, i.e.
70 -- Hankaku Kana, do not appear, since Shift JIS has no representation
71 -- for such codes.
72
73 function Shift_JIS_To_JIS (SJ1, SJ2 : Character) return Wide_Character;
74 -- Given the two bytes of a Shift-JIS representation, return the
75 -- corresponding JIS code wide character. Raises Constraint_Error if
76 -- the two characters are not a valid shift-JIS encoding.
77
78 end System.WCh_JIS;