1 ------------------------------------------------------------------------------
3 -- GNAT RUNTIME COMPONENTS --
5 -- S Y S T E M . W C H _ C N V --
10 -- Copyright (C) 1992-2000 Free Software Foundation, Inc. --
12 -- GNAT is free software; you can redistribute it and/or modify it under --
13 -- terms of the GNU General Public License as published by the Free Soft- --
14 -- ware Foundation; either version 2, or (at your option) any later ver- --
15 -- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
16 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
17 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNAT; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, USA. --
23 -- As a special exception, if other files instantiate generics from this --
24 -- unit, or you link this unit with other files to produce an executable, --
25 -- this unit does not by itself cause the resulting executable to be --
26 -- covered by the GNU General Public License. This exception does not --
27 -- however invalidate any other reasons why the executable file might be --
28 -- covered by the GNU Public License. --
30 -- GNAT was originally developed by the GNAT team at New York University. --
31 -- Extensive contributions were provided by Ada Core Technologies Inc. --
33 ------------------------------------------------------------------------------
35 -- This package contains generic subprograms used for converting between
36 -- sequences of Character and Wide_Character. All access to wide character
37 -- sequences is isolated in this unit.
41 package System.WCh_Cnv is
42 pragma Pure (WCh_Cnv);
45 with function In_Char return Character;
46 function Char_Sequence_To_Wide_Char
48 EM : System.WCh_Con.WC_Encoding_Method)
49 return Wide_Character;
50 -- C is the first character of a sequence of one or more characters which
51 -- represent a wide character sequence. Calling the function In_Char for
52 -- additional characters as required, Char_To_Wide_Char returns the
53 -- corresponding wide character value. Constraint_Error is raised if the
54 -- sequence of characters encountered is not a valid wide character
55 -- sequence for the given encoding method.
58 with procedure Out_Char (C : Character);
59 procedure Wide_Char_To_Char_Sequence
61 EM : System.WCh_Con.WC_Encoding_Method);
62 -- Given a wide character, converts it into a sequence of one or
63 -- more characters, calling the given Out_Char procedure for each.
64 -- Constraint_Error is raised if the given wide character value is
65 -- not a valid value for the given encoding method.