123 lines
4.7 KiB
Ada
123 lines
4.7 KiB
Ada
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------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- S Y S T E M . W C H _ W T S --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2013, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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with System.WCh_Con; use System.WCh_Con;
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with System.WCh_Cnv; use System.WCh_Cnv;
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package body System.WCh_WtS is
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-----------------------
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-- Local Subprograms --
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-----------------------
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procedure Store_UTF_32_Character
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(U : UTF_32_Code;
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S : out String;
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P : in out Integer;
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EM : WC_Encoding_Method);
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-- Stores the string representation of the wide or wide wide character
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-- whose code is given as U, starting at S (P + 1). P is incremented to
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-- point to the last character stored. Raises CE if character cannot be
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-- stored using the given encoding method.
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----------------------------
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-- Store_UTF_32_Character --
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----------------------------
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procedure Store_UTF_32_Character
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(U : UTF_32_Code;
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S : out String;
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P : in out Integer;
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EM : WC_Encoding_Method)
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is
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procedure Out_Char (C : Character);
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pragma Inline (Out_Char);
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-- Procedure to increment P and store C at S (P)
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procedure Store_Chars is new UTF_32_To_Char_Sequence (Out_Char);
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--------------
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-- Out_Char --
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--------------
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procedure Out_Char (C : Character) is
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begin
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P := P + 1;
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S (P) := C;
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end Out_Char;
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begin
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Store_Chars (U, EM);
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end Store_UTF_32_Character;
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---------------------------
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-- Wide_String_To_String --
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---------------------------
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function Wide_String_To_String
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(S : Wide_String;
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EM : WC_Encoding_Method) return String
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is
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R : String (S'First .. S'First + 5 * S'Length); -- worst case length
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RP : Natural;
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begin
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RP := R'First - 1;
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for SP in S'Range loop
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Store_UTF_32_Character (Wide_Character'Pos (S (SP)), R, RP, EM);
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end loop;
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return R (R'First .. RP);
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end Wide_String_To_String;
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--------------------------------
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-- Wide_Wide_String_To_String --
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--------------------------------
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function Wide_Wide_String_To_String
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(S : Wide_Wide_String;
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EM : WC_Encoding_Method) return String
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is
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R : String (S'First .. S'First + 7 * S'Length); -- worst case length
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RP : Natural;
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begin
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RP := R'First - 1;
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for SP in S'Range loop
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Store_UTF_32_Character (Wide_Wide_Character'Pos (S (SP)), R, RP, EM);
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end loop;
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return R (R'First .. RP);
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end Wide_Wide_String_To_String;
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end System.WCh_WtS;
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