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277 | ------------------------------------------------------------------------------
-- --
-- Matreshka Project --
-- --
-- Localization, Internationalization, Globalization for Ada --
-- --
-- Runtime Library Component --
-- --
------------------------------------------------------------------------------
-- --
-- Copyright © 2014, Vadim Godunko <vgodunko@gmail.com> --
-- All rights reserved. --
-- --
-- Redistribution and use in source and binary forms, with or without --
-- modification, are permitted provided that the following conditions --
-- are met: --
-- --
-- * Redistributions of source code must retain the above copyright --
-- notice, this list of conditions and the following disclaimer. --
-- --
-- * Redistributions in binary form must reproduce the above copyright --
-- notice, this list of conditions and the following disclaimer in the --
-- documentation and/or other materials provided with the distribution. --
-- --
-- * Neither the name of the Vadim Godunko, IE nor the names of its --
-- contributors may be used to endorse or promote products derived from --
-- this software without specific prior written permission. --
-- --
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS --
-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT --
-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR --
-- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT --
-- HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, --
-- SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED --
-- TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR --
-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF --
-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING --
-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS --
-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. --
-- --
------------------------------------------------------------------------------
-- $Revision: 4830 $ $Date: 2014-04-11 13:42:56 +0400 (Пт, 11 апр 2014) $
------------------------------------------------------------------------------
with Ada.Characters.Wide_Wide_Latin_1;
with League.Strings;
package body Matreshka.CLDR.Collation_Rules_Parser is
-- function Is_Collation_Syntax_Character
-- (Item : Wide_Wide_Character) return Boolean;
-- -- Returns True when given character is reserved for collation syntax.
procedure Skip_Spaces
(Buffer : Wide_Wide_String;
Index : in out Positive;
Last : Natural);
procedure Parse_String
(Buffer : Wide_Wide_String;
Index : in out Positive;
Last : Natural;
Value : out League.Strings.Universal_String;
Success : out Boolean);
-- Parses string.
procedure Parse_Relation_Operator
(Buffer : Wide_Wide_String;
Index : in out Positive;
Last : Natural;
Value : out Matreshka.CLDR.Collation_Data.Collation_Operator;
Success : out Boolean);
-- Parses string.
-- -----------------------------------
-- -- Is_Collation_Syntax_Character --
-- -----------------------------------
-- function Is_Collation_Syntax_Character
-- (Item : Wide_Wide_Character) return Boolean;
---------------------------
-- Parse_Collation_Rules --
---------------------------
procedure Parse_Collation_Rules
(Data : in out Matreshka.CLDR.Collation_Data.Collation_Information;
Buffer : Wide_Wide_String)
is
Index : Positive := Buffer'First;
Reset : League.Strings.Universal_String;
Next : League.Strings.Universal_String;
Operator : Matreshka.CLDR.Collation_Data.Collation_Operator;
Success : Boolean;
begin
Skip_Spaces (Buffer, Index, Buffer'Last);
while Index <= Buffer'Last loop
if Buffer (Index) /= '&' then
raise Program_Error;
end if;
Index := Index + 1;
Parse_String (Buffer, Index, Buffer'Last, Reset, Success);
if not Success then
raise Program_Error;
end if;
while Index <= Buffer'Last loop
Skip_Spaces (Buffer, Index, Buffer'Last);
exit when Index > Buffer'Last;
exit when Buffer (Index) = '&';
Parse_Relation_Operator
(Buffer, Index, Buffer'Last, Operator, Success);
if not Success then
raise Program_Error;
end if;
Parse_String (Buffer, Index, Buffer'Last, Next, Success);
if not Success then
raise Program_Error;
end if;
if Reset.Length /= 1 then
raise Program_Error;
elsif Next.Length /= 1 then
raise Program_Error;
else
Matreshka.CLDR.Collation_Data.Reorder
(Data,
Wide_Wide_Character'Pos (Reset (1).To_Wide_Wide_Character),
Operator,
Wide_Wide_Character'Pos (Next (1).To_Wide_Wide_Character));
end if;
Reset := Next;
end loop;
end loop;
end Parse_Collation_Rules;
-----------------------------
-- Parse_Relation_Operator --
-----------------------------
procedure Parse_Relation_Operator
(Buffer : Wide_Wide_String;
Index : in out Positive;
Last : Natural;
Value : out Matreshka.CLDR.Collation_Data.Collation_Operator;
Success : out Boolean) is
begin
Value := Matreshka.CLDR.Collation_Data.Identically;
Success := False;
Skip_Spaces (Buffer, Index, Last);
if Index > Last then
return;
end if;
while Index <= Last loop
case Buffer (Index) is
when '<' =>
case Value is
when Matreshka.CLDR.Collation_Data.Identically =>
Success := True;
Value := Matreshka.CLDR.Collation_Data.Primary;
when Matreshka.CLDR.Collation_Data.Primary =>
Success := True;
Value := Matreshka.CLDR.Collation_Data.Secondary;
when Matreshka.CLDR.Collation_Data.Secondary =>
Success := True;
Value := Matreshka.CLDR.Collation_Data.Trinary;
when Matreshka.CLDR.Collation_Data.Trinary =>
Success := True;
raise Program_Error;
end case;
when others =>
return;
end case;
Index := Index + 1;
end loop;
end Parse_Relation_Operator;
------------------
-- Parse_String --
------------------
procedure Parse_String
(Buffer : Wide_Wide_String;
Index : in out Positive;
Last : Natural;
Value : out League.Strings.Universal_String;
Success : out Boolean) is
begin
Value.Clear;
Success := False;
Skip_Spaces (Buffer, Index, Last);
if Index > Last then
return;
end if;
while Index <= Last loop
case Buffer (Index) is
when '<' =>
return;
when ' ' =>
return;
when Ada.Characters.Wide_Wide_Latin_1.LF =>
return;
when others =>
Success := True;
Value.Append (Buffer (Index));
end case;
Index := Index + 1;
end loop;
end Parse_String;
-----------------
-- Skip_Spaces --
-----------------
procedure Skip_Spaces
(Buffer : Wide_Wide_String;
Index : in out Positive;
Last : Natural) is
begin
while Index <= Last loop
case Buffer (Index) is
when ' '
| Ada.Characters.Wide_Wide_Latin_1.HT
| Ada.Characters.Wide_Wide_Latin_1.LF
=>
Index := Index + 1;
when '#' =>
Index := Index + 1;
while Index <= Last loop
case Buffer (Index) is
when Ada.Characters.Wide_Wide_Latin_1.LF =>
Index := Index + 1;
exit;
when others =>
Index := Index + 1;
end case;
end loop;
when others =>
exit;
end case;
end loop;
end Skip_Spaces;
end Matreshka.CLDR.Collation_Rules_Parser;
|