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Diffstat (limited to 'gcc/ada/s-widwch.adb')
| -rw-r--r-- | gcc/ada/s-widwch.adb | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/gcc/ada/s-widwch.adb b/gcc/ada/s-widwch.adb new file mode 100644 index 000000000..5d9df7bf7 --- /dev/null +++ b/gcc/ada/s-widwch.adb @@ -0,0 +1,104 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUN-TIME COMPONENTS -- +-- -- +-- S Y S T E M . W I D _ W C H A R -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1992-2009, 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 3, 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. -- +-- -- +-- As a special exception under Section 7 of GPL version 3, you are granted -- +-- additional permissions described in the GCC Runtime Library Exception, -- +-- version 3.1, as published by the Free Software Foundation. -- +-- -- +-- You should have received a copy of the GNU General Public License and -- +-- a copy of the GCC Runtime Library Exception along with this program; -- +-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- +-- <http://www.gnu.org/licenses/>. -- +-- -- +-- GNAT was originally developed by the GNAT team at New York University. -- +-- Extensive contributions were provided by Ada Core Technologies Inc. -- +-- -- +------------------------------------------------------------------------------ + +package body System.Wid_WChar is + + -------------------------- + -- Width_Wide_Character -- + -------------------------- + + function Width_Wide_Character + (Lo, Hi : Wide_Character) return Natural + is + W : Natural; + P : Natural; + + begin + W := 0; + for C in Lo .. Hi loop + P := Wide_Character'Pos (C); + + -- Here if we find a character in wide character range + -- Width is max value (12) for Hex_hhhhhhhh + + if P > 16#FF# then + return 12; + + -- If we are in character range then use length of character image + + else + declare + S : constant String := Character'Image (Character'Val (P)); + begin + W := Natural'Max (W, S'Length); + end; + end if; + end loop; + + return W; + end Width_Wide_Character; + + ------------------------------- + -- Width_Wide_Wide_Character -- + ------------------------------- + + function Width_Wide_Wide_Character + (Lo, Hi : Wide_Wide_Character) return Natural + is + W : Natural; + P : Natural; + + begin + W := 0; + for C in Lo .. Hi loop + P := Wide_Wide_Character'Pos (C); + + -- Here if we find a character in wide wide character range. + -- Width is max value (12) for Hex_hhhhhhhh + + if P > 16#FF# then + W := 12; + + -- If we are in character range then use length of character image + + else + declare + S : constant String := Character'Image (Character'Val (P)); + begin + W := Natural'Max (W, S'Length); + end; + end if; + end loop; + + return W; + end Width_Wide_Wide_Character; + +end System.Wid_WChar; |