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- ------------------------------------------------------------------------------
- -- --
- -- GNAT RUNTIME COMPONENTS --
- -- --
- -- S Y S T E M . W C H _ J I S --
- -- --
- -- S p e c --
- -- --
- -- $Revision: 1.4 $ --
- -- --
- -- Copyright (c) 1992,1993,1994 NYU, All Rights Reserved --
- -- --
- -- The GNAT library is free software; you can redistribute it and/or modify --
- -- it under terms of the GNU Library General Public License as published by --
- -- the Free Software Foundation; either version 2, or (at your option) any --
- -- later version. The GNAT 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 --
- -- Library General Public License for more details. You should have --
- -- received a copy of the GNU Library General Public License along with --
- -- the GNAT library; see the file COPYING.LIB. If not, write to the Free --
- -- Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. --
- -- --
- ------------------------------------------------------------------------------
-
- -- This package contains routines used for converting between internal
- -- JIS codes and the two external forms we support (EUC and Shift-JIS)
-
- package System.WCh_JIS is
- pragma Pure (WCh_JIS);
-
- function EUC_To_JIS (EUC1, EUC2 : Character) return Wide_Character;
- -- Given the two bytes of a EUC representation, return the
- -- corresponding JIS code wide character. Raises Constraint_Error
- -- if the two characters are not a valid EUC encoding.
-
- procedure JIS_To_EUC
- (J : in Wide_Character;
- EUC1 : out Character;
- EUC2 : out Character);
-
- -- Given a wide character in JIS form, produce the corresponding
- -- two bytes of the EUC representation of this character. This is
- -- only used if J is not in the normal ASCII range, i.e. on entry
- -- we know that Wide_Character'Pos (J) >= 16#0080# and that we
- -- thus require a two byte EUC representation (ASCII codes appear
- -- unchanged as a single byte in EUC). No error checking is performed,
- -- the input code is assumed to be in an appropriate range.
-
- procedure JIS_To_Shift_JIS
- (J : in Wide_Character;
- SJ1 : out Character;
- SJ2 : out Character);
- -- Given a wide character code in JIS form, produce the corresponding
- -- two bytes of the Shift-JIS representation of this character. This
- -- is only used if J is not in the normal ASCII range, i.e. on entry
- -- we know that Wide_Character'Pos (J) >= 16#0080# and that we
- -- thus require a two byte EUC representation (ASCII codes appear
- -- unchanged as a single byte in EUC). No error checking is performed,
- -- the input code is assumed to be in an appropriate range (note in
- -- particular that input codes in the range 16#0080#-16#00FF#, i.e.
- -- Hankaku Kana, do not appear, since Shift JIS has no representation
- -- for such codes.
-
- function Shift_JIS_To_JIS (SJ1, SJ2 : Character) return Wide_Character;
- -- Given the two bytes of a Shift-JIS representation, return the
- -- corresponding JIS code wide character. Raises Constraint_Error if
- -- the two characters are not a valid shift-JIS encoding.
-
- end System.WCh_JIS;
-