------------------------------------------------------------------------------ -- -- -- GNAT RUNTIME COMPONENTS -- -- -- -- S Y S T E M . W C H _ C N V -- -- -- -- S p e c -- -- -- -- Copyright (C) 1992-2005 Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 2, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- -- for more details. You should have received a copy of the GNU General -- -- Public License distributed with GNAT; see file COPYING. If not, write -- -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- -- MA 02111-1307, USA. -- -- -- -- As a special exception, if other files instantiate generics from this -- -- unit, or you link this unit with other files to produce an executable, -- -- this unit does not by itself cause the resulting executable to be -- -- covered by the GNU General Public License. This exception does not -- -- however invalidate any other reasons why the executable file might be -- -- covered by the GNU Public License. -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ -- This unit may be used directly from an application program by providing -- an appropriate WITH, and the interface can be expected to remain stable. with System.WCh_Con; package System.WCh_Cnv is pragma Pure (WCh_Cnv); type UTF_32_Code is range 0 .. 16#7FFF_FFFF#; for UTF_32_Code'Size use 32; -- Range of allowed UTF-32 encoding values generic with function In_Char return Character; function Char_Sequence_To_Wide_Char (C : Character; EM : System.WCh_Con.WC_Encoding_Method) return Wide_Character; -- C is the first character of a sequence of one or more characters which -- represent a wide character sequence. Calling the function In_Char for -- additional characters as required, Char_To_Wide_Char returns the -- corresponding wide character value. Constraint_Error is raised if the -- sequence of characters encountered is not a valid wide character -- sequence for the given encoding method. generic with function In_Char return Character; function Char_Sequence_To_UTF_32 (C : Character; EM : System.WCh_Con.WC_Encoding_Method) return UTF_32_Code; -- This is similar to the above, but the function returns a code from -- the full UTF_32 code set, which covers the full range of possible -- values in Wide_Wide_Character. The result can be converted to -- Wide_Wide_Character form using Wide_Wide_Character'Val. generic with procedure Out_Char (C : Character); procedure Wide_Char_To_Char_Sequence (WC : Wide_Character; EM : System.WCh_Con.WC_Encoding_Method); -- Given a wide character, converts it into a sequence of one or -- more characters, calling the given Out_Char procedure for each. -- Constraint_Error is raised if the given wide character value is -- not a valid value for the given encoding method. generic with procedure Out_Char (C : Character); procedure UTF_32_To_Char_Sequence (Val : UTF_32_Code; EM : System.WCh_Con.WC_Encoding_Method); -- This is similar to the above, but the input value is a code from the -- full UTF_32 code set, which covers the full range of possible values -- in Wide_Wide_Character. To convert a Wide_Wide_Character value, the -- caller can use Wide_Wide_Character'Pos in the call. end System.WCh_Cnv;