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------------------------------------------------------------------------------
-- XML/Ada - An XML suite for Ada95 --
-- --
-- Copyright (C) 2001-2017, AdaCore --
-- --
-- This library is free software; you can redistribute it and/or modify it --
-- under terms of the GNU General Public License as published by the Free --
-- Software Foundation; either version 3, or (at your option) any later --
-- version. This library is distributed in the hope that it will be useful, --
-- but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHAN- --
-- TABILITY 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/>. --
-- --
------------------------------------------------------------------------------
with Unicode; use Unicode;
with Unicode.CES; use Unicode.CES;
with Unicode.CES.Utf32; use Unicode.CES.Utf32;
with Unicode.CES.Utf16; use Unicode.CES.Utf16;
with Unicode.CES.Utf8; use Unicode.CES.Utf8;
package body Input_Sources.Strings is
----------
-- Open --
----------
procedure Open
(Str : Unicode.CES.Cst_Byte_Sequence_Access;
Encoding : Unicode.CES.Encoding_Scheme;
Input : out String_Input)
is
BOM : Bom_Type;
begin
Input.Encoding := Encoding;
Input.Buffer := Str;
Input.Buffer2 := null;
Read_Bom (Input.Buffer.all, Input.Prolog_Size, BOM);
case BOM is
when Utf32_LE =>
Set_Encoding (Input, Utf32_LE_Encoding);
when Utf32_BE =>
Set_Encoding (Input, Utf32_BE_Encoding);
when Utf16_LE =>
Set_Encoding (Input, Utf16_LE_Encoding);
when Utf16_BE =>
Set_Encoding (Input, Utf16_BE_Encoding);
when Ucs4_BE | Ucs4_LE | Ucs4_2143 | Ucs4_3412 =>
raise Invalid_Encoding;
when Utf8_All | Unknown =>
Set_Encoding (Input, Utf8_Encoding);
end case;
Input.Index := Input.Buffer'First + Input.Prolog_Size;
end Open;
----------
-- Open --
----------
procedure Open
(Str : Unicode.CES.Byte_Sequence;
Encoding : Unicode.CES.Encoding_Scheme;
Input : out String_Input)
is
BOM : Bom_Type;
begin
Input.Encoding := Encoding;
Input.Buffer2 := new Byte_Sequence'(Str);
Input.Buffer := Cst_Byte_Sequence_Access (Input.Buffer2);
Read_Bom (Input.Buffer.all, Input.Prolog_Size, BOM);
case BOM is
when Utf32_LE =>
Set_Encoding (Input, Utf32_LE_Encoding);
when Utf32_BE =>
Set_Encoding (Input, Utf32_BE_Encoding);
when Utf16_LE =>
Set_Encoding (Input, Utf16_LE_Encoding);
when Utf16_BE =>
Set_Encoding (Input, Utf16_BE_Encoding);
when Ucs4_BE | Ucs4_LE | Ucs4_2143 | Ucs4_3412 =>
raise Invalid_Encoding;
when Utf8_All | Unknown =>
Set_Encoding (Input, Utf8_Encoding);
end case;
Input.Index := Input.Buffer'First + Input.Prolog_Size;
end Open;
-----------
-- Close --
-----------
procedure Close (Input : in out String_Input) is
begin
if Input.Buffer2 /= null then
Free (Input.Buffer2);
end if;
Input_Sources.Close (Input_Source (Input));
end Close;
---------------
-- Next_Char --
---------------
procedure Next_Char
(From : in out String_Input;
C : out Unicode.Unicode_Char) is
begin
From.Encoding.Read (From.Buffer.all, From.Index, C);
exception
-- For a String input, an incomplete encoding is invalid.
when Incomplete_Encoding =>
raise Invalid_Encoding;
end Next_Char;
---------
-- Eof --
---------
function Eof (From : String_Input) return Boolean is
begin
return From.Index > From.Buffer'Last;
end Eof;
end Input_Sources.Strings;
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