%%-*-erlang-*-
%%--------------------------------------------------------------------
%% %CopyrightBegin%
%% 
%% Copyright Ericsson AB 2008-2017. All Rights Reserved.
%% 
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%%     http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%% 
%% %CopyrightEnd%
%%----------------------------------------------------------------------
%% File    : xmerl_sax_parser_utf16le.erl
%% Description : 
%%
%% Created : 26 May 2008 
%%----------------------------------------------------------------------
-module(xmerl_sax_parser_utf16le).

%%----------------------------------------------------------------------
%% Macros
%%----------------------------------------------------------------------
-define(STRING_EMPTY, <<>>).
-define(STRING(MatchStr), <<MatchStr/little-utf16>>).
-define(STRING_REST(MatchStr, Rest), <<MatchStr/little-utf16,  Rest/binary>>).
-define(APPEND_STRING(Rest, New), <<Rest/binary, New/binary>>).
-define(TO_INPUT_FORMAT(Val), unicode:characters_to_binary(Val, unicode, {utf16, little})).

-define(STRING_UNBOUND_REST(MatchChar, Rest), <<MatchChar/little-utf16, Rest/binary>>).
-define(BYTE_ORDER_MARK_1, <<16#FF>>).
-define(BYTE_ORDER_MARK_REST(Rest), <<16#FF, 16#FE, Rest/binary>>).

-define(PARSE_BYTE_ORDER_MARK(Bytes, State),
        parse_byte_order_mark(?STRING_EMPTY, State) ->
               cf(?STRING_EMPTY, State, fun parse_byte_order_mark/2);
        parse_byte_order_mark(?BYTE_ORDER_MARK_1, State) ->
               cf(?BYTE_ORDER_MARK_1, State, fun parse_byte_order_mark/2);
        parse_byte_order_mark(?BYTE_ORDER_MARK_REST(Rest), State) ->
               parse_xml_decl(Rest, State);
        parse_byte_order_mark(Bytes, State) ->
               parse_xml_decl(Bytes, State)).

-define(PARSE_XML_DECL(Bytes, State), 
        parse_xml_decl(Bytes, #xmerl_sax_parser_state{encoding=Enc} = State) when is_binary(Bytes) ->
               case unicode:characters_to_list(Bytes, Enc) of 
                   {incomplete, _, _} ->
                       cf(Bytes, State, fun parse_xml_decl/2);
                   {error, _Encoded, _Rest} ->
                       ?fatal_error(State,  lists:flatten(io_lib:format("Bad character, not in ~p\n", [Enc])));
                   _ ->
                       parse_prolog(Bytes, State)
               end;       
        parse_xml_decl(Bytes, State) ->
               parse_prolog(Bytes, State)).

-define(WHITESPACE(Bytes, State, Acc),
        whitespace(?STRING_UNBOUND_REST(_C, _) = Bytes, State, Acc) -> 
               {lists:reverse(Acc), Bytes, State};
        whitespace(Bytes, #xmerl_sax_parser_state{encoding=Enc} = State, Acc) when is_binary(Bytes) -> 
               case unicode:characters_to_list(Bytes, Enc) of 
                   {incomplete, _, _} ->
                       cf(Bytes, State, Acc, fun whitespace/3);
                   {error, _Encoded, _Rest} ->
                       ?fatal_error(State, lists:flatten(io_lib:format("Bad character, not in ~p\n", [Enc])))
               end).

-define(PARSE_EXTERNAL_ENTITY_BYTE_ORDER_MARK(Bytes, State),
        parse_external_entity_byte_order_mark(?STRING_EMPTY, State) ->
               cf(?STRING_EMPTY, State, fun parse_external_entity_byte_order_mark/2);
        parse_external_entity_byte_order_mark(?BYTE_ORDER_MARK_1, State) ->
               cf(?BYTE_ORDER_MARK_1, State, fun parse_external_entity_byte_order_mark/2);
        parse_external_entity_byte_order_mark(?BYTE_ORDER_MARK_REST(Rest), State) ->
               parse_external_entity_1(Rest, State);
        parse_external_entity_byte_order_mark(Bytes, State) ->
               parse_external_entity_1(Bytes, State)).