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Diffstat (limited to 'gcc-4.8.3/gcc/ada/s-valcha.adb')
| -rw-r--r-- | gcc-4.8.3/gcc/ada/s-valcha.adb | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/gcc-4.8.3/gcc/ada/s-valcha.adb b/gcc-4.8.3/gcc/ada/s-valcha.adb new file mode 100644 index 000000000..799145fa8 --- /dev/null +++ b/gcc-4.8.3/gcc/ada/s-valcha.adb @@ -0,0 +1,76 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT COMPILER COMPONENTS -- +-- -- +-- S Y S T E M . V A L _ C H A R -- +-- -- +-- B o d y -- +-- -- +-- Copyright (C) 1992-2012, 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. -- +-- -- +------------------------------------------------------------------------------ + +with System.Val_Util; use System.Val_Util; + +package body System.Val_Char is + + --------------------- + -- Value_Character -- + --------------------- + + function Value_Character (Str : String) return Character is + F : Natural; + L : Natural; + S : String (Str'Range) := Str; + + begin + Normalize_String (S, F, L); + + -- Accept any single character enclosed in quotes + + if L - F = 2 and then S (F) = ''' and then S (L) = ''' then + return Character'Val (Character'Pos (S (F + 1))); + + -- Check control character cases + + else + for C in Character'Val (16#00#) .. Character'Val (16#1F#) loop + if S (F .. L) = Character'Image (C) then + return C; + end if; + end loop; + + for C in Character'Val (16#7F#) .. Character'Val (16#9F#) loop + if S (F .. L) = Character'Image (C) then + return C; + end if; + end loop; + + if S (F .. L) = "SOFT_HYPHEN" then + return Character'Val (16#AD#); + end if; + + Bad_Value (Str); + end if; + end Value_Character; + +end System.Val_Char; |