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Diffstat (limited to 'gcc-4.2.1/gcc/ada/s-wwdwch.adb')
| -rw-r--r-- | gcc-4.2.1/gcc/ada/s-wwdwch.adb | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/gcc-4.2.1/gcc/ada/s-wwdwch.adb b/gcc-4.2.1/gcc/ada/s-wwdwch.adb new file mode 100644 index 000000000..798c66e03 --- /dev/null +++ b/gcc-4.2.1/gcc/ada/s-wwdwch.adb @@ -0,0 +1,132 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- S Y S T E M . W W D _ W C H A R -- +-- -- +-- B o d y -- +-- -- +-- 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, 51 Franklin Street, Fifth Floor, -- +-- Boston, MA 02110-1301, 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. -- +-- -- +------------------------------------------------------------------------------ + +with Interfaces; use Interfaces; + +with System.WWd_Char; + +package body System.Wwd_WChar is + + ------------------------------------ + -- Wide_Wide_Width_Wide_Character -- + ------------------------------------ + + -- This is the case where we are talking about the Wide_Wide_Image of + -- a Wide_Character, which is always the same character sequence as the + -- Wide_Image of the same Wide_Character. + + function Wide_Wide_Width_Wide_Character + (Lo, Hi : Wide_Character) return Natural + is + begin + return Wide_Width_Wide_Character (Lo, Hi); + end Wide_Wide_Width_Wide_Character; + + ------------------------------------ + -- Wide_Wide_Width_Wide_Wide_Char -- + ------------------------------------ + + function Wide_Wide_Width_Wide_Wide_Char + (Lo, Hi : Wide_Wide_Character) return Natural + is + LV : constant Unsigned_32 := Wide_Wide_Character'Pos (Lo); + HV : constant Unsigned_32 := Wide_Wide_Character'Pos (Hi); + + begin + -- Return zero if empty range + + if LV > HV then + return 0; + + -- Return max value (12) for wide character (Hex_hhhhhhhh) + + elsif HV > 255 then + return 12; + + -- If any characters in normal character range, then use normal + -- Wide_Wide_Width attribute on this range to find out a starting point. + -- Otherwise start with zero. + + else + return + System.WWd_Char.Wide_Wide_Width_Character + (Lo => Character'Val (LV), + Hi => Character'Val (Unsigned_32'Min (255, HV))); + end if; + end Wide_Wide_Width_Wide_Wide_Char; + + ------------------------------- + -- Wide_Width_Wide_Character -- + ------------------------------- + + function Wide_Width_Wide_Character + (Lo, Hi : Wide_Character) return Natural + is + LV : constant Unsigned_32 := Wide_Character'Pos (Lo); + HV : constant Unsigned_32 := Wide_Character'Pos (Hi); + + begin + -- Return zero if empty range + + if LV > HV then + return 0; + + -- Return max value (12) for wide character (Hex_hhhhhhhh) + + elsif HV > 255 then + return 12; + + -- If any characters in normal character range, then use normal + -- Wide_Wide_Width attribute on this range to find out a starting point. + -- Otherwise start with zero. + + else + return + System.WWd_Char.Wide_Width_Character + (Lo => Character'Val (LV), + Hi => Character'Val (Unsigned_32'Min (255, HV))); + end if; + end Wide_Width_Wide_Character; + + ------------------------------------ + -- Wide_Width_Wide_Wide_Character -- + ------------------------------------ + + function Wide_Width_Wide_Wide_Character + (Lo, Hi : Wide_Wide_Character) return Natural + is + begin + return Wide_Wide_Width_Wide_Wide_Char (Lo, Hi); + end Wide_Width_Wide_Wide_Character; + +end System.Wwd_WChar; |