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Diffstat (limited to 'gcc/ada/a-swunau.adb')
| -rw-r--r-- | gcc/ada/a-swunau.adb | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/gcc/ada/a-swunau.adb b/gcc/ada/a-swunau.adb new file mode 100644 index 00000000000..2d9a2dd0b1c --- /dev/null +++ b/gcc/ada/a-swunau.adb @@ -0,0 +1,104 @@ +------------------------------------------------------------------------------ +-- -- +-- GNAT RUNTIME COMPONENTS -- +-- -- +-- A D A . S T R I N G S . W I D E _ U N B O U N D E D . A U X -- +-- -- +-- 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, 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. -- +-- -- +------------------------------------------------------------------------------ + +package body Ada.Strings.Wide_Unbounded.Aux is + + -------------------- + -- Get_Wide_String -- + --------------------- + + function Get_Wide_String + (U : Unbounded_Wide_String) return Wide_String_Access + is + begin + if U.Last = U.Reference'Length then + return U.Reference; + + else + declare + type Unbounded_Wide_String_Access is + access all Unbounded_Wide_String; + + U_Ptr : constant Unbounded_Wide_String_Access := + U'Unrestricted_Access; + -- Unbounded_Wide_String is a controlled type which is always + -- passed by copy it is always safe to take the pointer to such + -- object here. This pointer is used to set the U.Reference value + -- which would not be possible otherwise as U is read-only. + + Old : Wide_String_Access := U.Reference; + + begin + U_Ptr.Reference := new Wide_String'(U.Reference (1 .. U.Last)); + Free (Old); + return U.Reference; + end; + end if; + end Get_Wide_String; + + --------------------- + -- Set_Wide_String -- + --------------------- + + procedure Set_Wide_String + (UP : in out Unbounded_Wide_String; + S : Wide_String) + is + begin + if UP.Last = S'Length then + UP.Reference.all := S; + + else + declare + subtype String_1 is Wide_String (1 .. S'Length); + Tmp : Wide_String_Access; + begin + Tmp := new Wide_String'(String_1 (S)); + Finalize (UP); + UP.Reference := Tmp; + UP.Last := UP.Reference'Length; + end; + end if; + end Set_Wide_String; + + procedure Set_Wide_String + (UP : in out Unbounded_Wide_String; + S : Wide_String_Access) + is + begin + Finalize (UP); + UP.Reference := S; + UP.Last := UP.Reference'Length; + end Set_Wide_String; + +end Ada.Strings.Wide_Unbounded.Aux; |