1162 lines
19 KiB
C++
1162 lines
19 KiB
C++
/*
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* This file is a part of PikoTools
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* and is distributed under the (new) BSD licence.
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* Author: Tomasz Sowa <t.sowa@ttmath.org>
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*/
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/*
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* Copyright (c) 2012-2021, Tomasz Sowa
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* * Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name Tomasz Sowa nor the names of contributors to this
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* project may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <cstdlib>
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#include <wchar.h>
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#include "spaceparser.h"
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#include "utf8/utf8.h"
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#include "convert/strtoint.h"
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namespace PT
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{
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SpaceParser::SpaceParser()
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{
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root_space = 0;
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SetDefault();
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}
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void SpaceParser::SetSpace(Space * pspace)
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{
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root_space = pspace;
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}
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void SpaceParser::SetSpace(Space & pspace)
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{
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root_space = &pspace;
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}
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void SpaceParser::SetDefault()
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{
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// you can change this separators to what you want
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// you shoud not use only white characters here (as expected by IsWhite() method)
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// and new line characters ('\n')
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separator = ':';
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space_start = '{';
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space_end = '}';
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table_start = '[';
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table_end = ']';
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option_delimiter = ',';
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skip_empty = false;
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use_escape_char = true;
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input_as_utf8 = true;
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}
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void SpaceParser::SkipEmpty(bool skip)
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{
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skip_empty = skip;
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}
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void SpaceParser::UseEscapeChar(bool escape)
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{
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use_escape_char = escape;
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}
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void SpaceParser::UTF8(bool utf)
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{
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input_as_utf8 = utf;
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}
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int SpaceParser::get_last_parsed_line()
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{
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return line;
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}
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SpaceParser::Status SpaceParser::ParseJSONFile(const char * file_name)
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{
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reading_from_file = true;
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parsing_space = false;
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file.clear();
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file.open(file_name, std::ios_base::binary | std::ios_base::in);
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if( file )
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{
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ParseRootSpace();
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file.close();
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}
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else
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{
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status = cant_open_file;
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}
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return status;
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}
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SpaceParser::Status SpaceParser::ParseJSONFile(const std::string & file_name)
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{
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return ParseJSONFile(file_name.c_str());
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}
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SpaceParser::Status SpaceParser::ParseJSONFile(const wchar_t * file_name)
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{
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std::string file_name_utf8;
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PT::WideToUTF8(file_name, file_name_utf8);
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return ParseJSONFile(file_name_utf8.c_str());
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}
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SpaceParser::Status SpaceParser::ParseJSONFile(const std::wstring & file_name)
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{
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return ParseJSONFile(file_name.c_str());
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}
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SpaceParser::Status SpaceParser::ParseSpaceFile(const char * file_name)
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{
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reading_from_file = true;
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parsing_space = true;
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file.clear();
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file.open(file_name, std::ios_base::binary | std::ios_base::in);
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if( file )
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{
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ParseRootSpace();
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file.close();
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}
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else
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{
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status = cant_open_file;
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}
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return status;
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}
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SpaceParser::Status SpaceParser::ParseSpaceFile(const std::string & file_name)
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{
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return ParseSpaceFile(file_name.c_str());
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}
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SpaceParser::Status SpaceParser::ParseSpaceFile(const wchar_t * file_name)
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{
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std::string file_name_utf8;
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PT::WideToUTF8(file_name, file_name_utf8);
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return ParseSpaceFile(file_name_utf8.c_str());
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}
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SpaceParser::Status SpaceParser::ParseSpaceFile(const std::wstring & file_name)
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{
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return ParseSpaceFile(file_name.c_str());
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}
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SpaceParser::Status SpaceParser::ParseJSON(const char * str)
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{
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reading_from_file = false;
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reading_from_wchar_string = false;
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pchar_ascii = str;
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pchar_unicode = 0;
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parsing_space = false;
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ParseRootSpace();
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return status;
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}
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SpaceParser::Status SpaceParser::ParseJSON(const std::string & str)
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{
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return ParseJSON(str.c_str());
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}
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SpaceParser::Status SpaceParser::ParseJSON(const wchar_t * str)
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{
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reading_from_file = false;
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reading_from_wchar_string = true;
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pchar_unicode = str;
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pchar_ascii = 0;
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parsing_space = false;
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ParseRootSpace();
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return status;
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}
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SpaceParser::Status SpaceParser::ParseJSON(const std::wstring & str)
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{
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return ParseJSON(str.c_str());
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}
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SpaceParser::Status SpaceParser::ParseSpace(const char * str)
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{
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reading_from_file = false;
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reading_from_wchar_string = false;
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pchar_ascii = str;
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pchar_unicode = 0;
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parsing_space = true;
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ParseRootSpace();
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return status;
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}
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SpaceParser::Status SpaceParser::ParseSpace(const std::string & str)
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{
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return ParseSpace(str.c_str());
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}
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SpaceParser::Status SpaceParser::ParseSpace(const wchar_t * str)
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{
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reading_from_file = false;
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reading_from_wchar_string = true;
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pchar_unicode = str;
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pchar_ascii = 0;
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parsing_space = true;
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ParseRootSpace();
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return status;
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}
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SpaceParser::Status SpaceParser::ParseSpace(const std::wstring & str)
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{
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return ParseSpace(str.c_str());
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}
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void SpaceParser::ParseRootSpace()
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{
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line = 1;
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status = ok;
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skipped = 0;
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if( !root_space )
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{
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status = no_space;
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return;
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}
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ReadChar(); // put first character to lastc
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if( parsing_space )
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{
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separator = '=';
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table_start = '(';
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table_end = ')';
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ParseSpace(root_space);
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}
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else
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{
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separator = ':';
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table_start = '[';
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table_end = ']';
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Parse(root_space, false, false);
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}
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SkipWhite();
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if( lastc != -1 )
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status = syntax_error;
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token.clear();
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}
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void SpaceParser::Parse(Space * space, bool is_object_value, bool is_table_value)
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{
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SkipWhite();
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if( lastc == space_start )
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{
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ParseSpace(space);
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}
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else
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if( lastc == table_start )
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{
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ParseTable(space);
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}
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else
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if( lastc == '"' ) // IMPROVEME define a variable
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{
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ParseTextValue(space);
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}
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else
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{
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ReadStringValue(token, is_object_value, is_table_value);
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if( token == L"null" )
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{
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space->set_null();
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}
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else
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if( token == L"true" )
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{
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space->set(true);
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}
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else
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if( token == L"false" )
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{
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space->set(false);
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}
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else
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if( is_integer_token() )
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{
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ParseIntegerValue(space);
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}
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else
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if( is_floating_point_token() )
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{
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ParseFloatingPointValue(space);
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}
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else
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{
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if( parsing_space )
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{
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space->set(token);
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}
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else
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{
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status = syntax_error;
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}
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}
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}
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}
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void SpaceParser::ParseSpace(Space * space)
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{
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/*
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* in Space format in global namespace the space start character is not required
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*/
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bool need_space_start_character = !parsing_space || space != root_space;
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if( need_space_start_character )
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{
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ReadChar(); // inserting a next character after the space_start char to lastc
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}
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space->set_empty_object();
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ParseKeyValuePairs(space);
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if( need_space_start_character )
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{
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if( lastc == space_end )
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{
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ReadChar();
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}
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else
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{
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status = syntax_error;
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}
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}
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}
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void SpaceParser::ParseTextValue(Space * space)
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{
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space->set_empty_wstring();
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std::wstring * str = space->get_wstr();
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if( parsing_space )
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ReadMultilineTokenQuoted(*str);
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else
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ReadTokenQuoted(*str);
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}
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void SpaceParser::ParseIntegerValue(Space * space)
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{
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const wchar_t * after_str = nullptr;
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bool was_overflow = false;
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int base = 10;
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if( parsing_space )
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{
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// in Space format when the integer value begins with a zero it means
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// this is an octal number
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if( !token.empty() && token[0] == '0' )
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base = 8;
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}
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long long val = Toll(token.c_str(), base, &after_str, &was_overflow, false);
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if( was_overflow )
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{
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status = syntax_error;
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}
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else
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if( size_t(after_str - token.c_str()) != token.size() )
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{
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status = syntax_error;
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}
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else
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{
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space->set(val);
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}
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}
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void SpaceParser::ParseFloatingPointValue(Space * space)
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{
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wchar_t * after_str = nullptr;
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double val = wcstod(token.c_str(), &after_str);
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if( errno == ERANGE )
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{
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status = syntax_error;
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}
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else
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if( size_t(after_str - token.c_str()) != token.size() )
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{
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status = syntax_error;
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}
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else
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{
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space->set(val);
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}
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}
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void SpaceParser::ParseTable(Space * space)
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{
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space->set_empty_table();
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ReadChar(); // inserting a next character after the table_start char to lastc
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space->set_empty_table();
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ParseValuesList(space);
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if( lastc == table_end )
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{
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ReadChar();
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}
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else
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{
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status = syntax_error;
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}
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}
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void SpaceParser::ParseKeyValuePairs(Space * space)
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{
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bool is_first = true;
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SkipWhite();
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while( status == ok && lastc != space_end && lastc != -1 )
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{
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if( !is_first )
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{
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SkipWhite();
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if( lastc == option_delimiter )
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{
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ReadChar(); // inserting a next character after the option_delimiter to lastc
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if( parsing_space )
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{
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// in space format a space_end character is allowed to be after the last table item
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SkipWhite();
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if( lastc == space_end )
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break;
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}
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}
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else
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if( !parsing_space )
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{
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// in json format the option_delimiter is required
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status = syntax_error;
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}
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}
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if( status == ok )
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{
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ReadKey();
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if( status == ok )
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{
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SkipWhite();
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if( lastc == separator )
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{
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ReadChar(); // inserting a next character after the separator to lastc
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Space & new_space = space->add(token.c_str(), new Space());
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Parse(&new_space, true, false);
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}
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else
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if( parsing_space && lastc == space_start )
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{
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Space & new_space = space->add_child_space(token.c_str());
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ParseSpace(&new_space);
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}
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else
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{
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status = syntax_error;
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}
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}
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}
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is_first = false;
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SkipWhite();
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}
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}
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void SpaceParser::ParseValuesList(Space * space)
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{
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bool is_first = true;
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SkipWhite();
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while( status == ok && lastc != table_end && lastc != -1 )
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{
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if( !is_first )
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{
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SkipWhite();
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if( lastc == option_delimiter ) // may add a new delimiter for tables? default the same as for objects...
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{
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ReadChar(); // inserting a next character after the delimiter
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if( parsing_space )
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{
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// in space format a table_end character is allowed to be after the last table item
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SkipWhite();
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if( lastc == table_end )
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break;
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}
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}
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else
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if( !parsing_space )
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{
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// in json format the option_delimiter is required
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status = syntax_error;
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}
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}
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if( status == ok )
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{
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Space * new_space = &space->add(new Space());
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Parse(new_space, false, true);
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}
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is_first = false;
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SkipWhite();
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}
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}
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|
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bool SpaceParser::is_integer_token()
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{
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if( token.empty() )
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return false;
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|
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size_t i = 0;
|
|
|
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if( token[i] == '-' )
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{
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i += 1;
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|
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if( token.size() == 1 )
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return false;
|
|
}
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|
|
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for( ; i < token.size() ; ++i)
|
|
{
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if( token[i] < '0' || token[i] > '9' )
|
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{
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return false;
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}
|
|
}
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|
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return true;
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}
|
|
|
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|
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bool SpaceParser::is_floating_point_token()
|
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{
|
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bool was_dot = false;
|
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bool was_exponential = false;
|
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bool was_plus_minus_sign = false;
|
|
|
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if( token.empty() )
|
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return false;
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|
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size_t i = 0;
|
|
|
|
if( token[i] == '-' )
|
|
{
|
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i += 1;
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|
|
if( token.size() == 1 )
|
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return false;
|
|
}
|
|
|
|
for( ; i < token.size() ; ++i)
|
|
{
|
|
if( token[i] == '.' )
|
|
{
|
|
if( was_dot || was_exponential )
|
|
return false;
|
|
|
|
was_dot = true;
|
|
}
|
|
else
|
|
if( token[i] == 'e' || token[i]=='E' )
|
|
{
|
|
if( was_exponential )
|
|
return false;
|
|
|
|
was_exponential = true;
|
|
|
|
// the exponential character cannot be the last character
|
|
if( i + 1 == token.size() )
|
|
return false;
|
|
}
|
|
else
|
|
if( token[i] == '+' || token[i] == '-' )
|
|
{
|
|
if( was_plus_minus_sign || !was_exponential )
|
|
return false;
|
|
|
|
// the plus or minus should be after the exponential character
|
|
if( i > 0 && (token[i-1] != 'e' && token[i-1] != 'E') )
|
|
return false;
|
|
|
|
was_plus_minus_sign = true;
|
|
}
|
|
else
|
|
if( token[i] < '0' || token[i] > '9' )
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
|
|
bool SpaceParser::IsWhite(int c)
|
|
{
|
|
// 13 (\r) is at the end of a line in a dos file \r\n
|
|
// 160 is an unbreakable space
|
|
if( c==' ' || c=='\t' || c==13 || c==160 || c==10 )
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
|
|
bool SpaceParser::is_alfa_numeric_char(int c)
|
|
{
|
|
return (c >= 'a' && c <= 'z') ||
|
|
(c >= 'A' && c <= 'Z') ||
|
|
(c >= '0' && c <= '9') ||
|
|
c == '.' || c=='-' || c=='+';
|
|
}
|
|
|
|
|
|
void SpaceParser::SkipLine()
|
|
{
|
|
while( lastc != -1 && (char_was_escaped || lastc != '\n') )
|
|
ReadChar();
|
|
}
|
|
|
|
|
|
|
|
void SpaceParser::SkipWhite()
|
|
{
|
|
if( parsing_space )
|
|
{
|
|
while( IsWhite(lastc) || (!char_was_escaped && lastc == '#') )
|
|
{
|
|
if( lastc == '#' )
|
|
SkipLine();
|
|
else
|
|
ReadChar();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
while( IsWhite(lastc) )
|
|
{
|
|
ReadChar();
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
void SpaceParser::TrimLastWhite(std::wstring & s)
|
|
{
|
|
std::wstring::size_type i;
|
|
|
|
for(i=s.size() ; i>0 && IsWhite(s[i-1]) ; --i)
|
|
{
|
|
}
|
|
|
|
if( i < s.size() )
|
|
{
|
|
s.erase(i, std::wstring::npos);
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
void SpaceParser::Trim(std::wstring & s)
|
|
{
|
|
std::wstring::size_type i;
|
|
|
|
if( s.empty() )
|
|
return;
|
|
|
|
// looking for white characters at the end
|
|
for(i=s.size()-1 ; i>0 && IsWhite(s[i]) ; --i);
|
|
|
|
if( i==0 && IsWhite(s[i]) )
|
|
{
|
|
// the whole string consists of white characters
|
|
s.clear();
|
|
return;
|
|
}
|
|
|
|
// deleting white characters at the end
|
|
if( i != s.size() - 1 )
|
|
s.erase(i+1, std::wstring::npos);
|
|
|
|
// looking for white characters at the beginning
|
|
for(i=0 ; i<s.size() && IsWhite(s[i]) ; ++i);
|
|
|
|
// deleting white characters at the beginning
|
|
if( i != 0 )
|
|
s.erase(0, i);
|
|
}
|
|
*/
|
|
|
|
|
|
void SpaceParser::ReadTokenUntilDelimiter(std::wstring & token, int delimiter1, int delimiter2)
|
|
{
|
|
token.clear();
|
|
|
|
while( lastc != -1 && (char_was_escaped || (lastc != '\n' && lastc != '#' && lastc != delimiter1 && lastc != delimiter2)) )
|
|
{
|
|
token += static_cast<wchar_t>(lastc);
|
|
ReadChar();
|
|
}
|
|
|
|
TrimLastWhite(token);
|
|
}
|
|
|
|
|
|
void SpaceParser::ReadAlfaNumericToken(std::wstring & token)
|
|
{
|
|
token.clear();
|
|
|
|
while( is_alfa_numeric_char(lastc) )
|
|
{
|
|
token += static_cast<wchar_t>(lastc);
|
|
ReadChar();
|
|
}
|
|
}
|
|
|
|
|
|
void SpaceParser::ReadStringValue(std::wstring & token, bool is_object_value, bool is_table_value)
|
|
{
|
|
if( parsing_space )
|
|
{
|
|
if( is_object_value )
|
|
{
|
|
ReadTokenUntilDelimiter(token, space_end, -1);
|
|
}
|
|
else
|
|
if( is_table_value )
|
|
{
|
|
ReadTokenUntilDelimiter(token, table_end, option_delimiter);
|
|
}
|
|
else
|
|
{
|
|
ReadTokenUntilDelimiter(token, -1, -1);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ReadAlfaNumericToken(token);
|
|
}
|
|
}
|
|
|
|
|
|
// rename to something like ReadSpaceFieldToken???
|
|
void SpaceParser::ReadSpaceFieldToken(std::wstring & token)
|
|
{
|
|
token.clear();
|
|
|
|
while( lastc != -1 && (char_was_escaped || (lastc != separator && lastc != 10 && lastc != space_start && lastc != '#' )) )
|
|
{
|
|
token += static_cast<wchar_t>(lastc);
|
|
ReadChar();
|
|
}
|
|
|
|
TrimLastWhite(token);
|
|
}
|
|
|
|
|
|
// IMPROVEME in JSON we should not allow non-escaped a new line character
|
|
void SpaceParser::ReadTokenQuoted(std::wstring & token)
|
|
{
|
|
token.clear();
|
|
ReadChar(); // skipping the first quotation mark
|
|
|
|
while( lastc != -1 && (char_was_escaped || (lastc != '"' && lastc != 10)) )
|
|
{
|
|
token += static_cast<wchar_t>(lastc);
|
|
ReadChar();
|
|
}
|
|
|
|
if( !char_was_escaped && lastc == '"' )
|
|
{
|
|
ReadChar(); // skipping the last quotation mark
|
|
}
|
|
else
|
|
{
|
|
status = syntax_error;
|
|
}
|
|
}
|
|
|
|
|
|
void SpaceParser::ReadMultilineTokenQuoted(std::wstring & token)
|
|
{
|
|
token.clear();
|
|
ReadChar(); // skipping the first quotation mark
|
|
|
|
while( lastc != -1 && (char_was_escaped || lastc != '"') )
|
|
{
|
|
token += static_cast<wchar_t>(lastc);
|
|
ReadChar();
|
|
}
|
|
|
|
if( !char_was_escaped && lastc == '"' )
|
|
{
|
|
ReadChar(); // skipping the last quotation mark
|
|
}
|
|
else
|
|
{
|
|
status = syntax_error;
|
|
}
|
|
}
|
|
|
|
|
|
/*
|
|
* this method is used to read the field name (key) in an object
|
|
* or to read the space child name (used in Space format)
|
|
*/
|
|
void SpaceParser::ReadKey()
|
|
{
|
|
SkipWhite();
|
|
|
|
if( parsing_space )
|
|
{
|
|
if( lastc == '"' )
|
|
{
|
|
ReadMultilineTokenQuoted(token);
|
|
}
|
|
else
|
|
{
|
|
ReadSpaceFieldToken(token);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if( lastc == '"' )
|
|
{
|
|
ReadTokenQuoted(token);
|
|
}
|
|
else
|
|
{
|
|
status = syntax_error;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
int SpaceParser::ReadUTF8Char()
|
|
{
|
|
int c;
|
|
bool correct;
|
|
|
|
lastc = -1;
|
|
|
|
do
|
|
{
|
|
PT::UTF8ToInt(file, c, correct);
|
|
|
|
if( !file )
|
|
return lastc;
|
|
}
|
|
while( !correct );
|
|
|
|
lastc = c;
|
|
|
|
if( lastc == '\n' )
|
|
++line;
|
|
|
|
return lastc;
|
|
}
|
|
|
|
|
|
|
|
int SpaceParser::ReadASCIIChar()
|
|
{
|
|
lastc = file.get();
|
|
|
|
if( lastc == '\n' )
|
|
++line;
|
|
|
|
return lastc;
|
|
}
|
|
|
|
|
|
|
|
|
|
int SpaceParser::ReadCharFromWcharString()
|
|
{
|
|
if( *pchar_unicode == 0 )
|
|
lastc = -1;
|
|
else
|
|
lastc = *(pchar_unicode++);
|
|
|
|
if( lastc == '\n' )
|
|
++line;
|
|
|
|
return lastc;
|
|
}
|
|
|
|
|
|
int SpaceParser::ReadCharFromUTF8String()
|
|
{
|
|
int c;
|
|
bool correct;
|
|
|
|
lastc = -1;
|
|
|
|
do
|
|
{
|
|
size_t len = PT::UTF8ToInt(pchar_ascii, c, correct);
|
|
pchar_ascii += len;
|
|
}
|
|
while( *pchar_ascii && !correct );
|
|
|
|
if( correct )
|
|
lastc = c;
|
|
|
|
if( lastc == '\n' )
|
|
++line;
|
|
|
|
return lastc;
|
|
|
|
}
|
|
|
|
|
|
int SpaceParser::ReadCharFromAsciiString()
|
|
{
|
|
if( *pchar_ascii == 0 )
|
|
lastc = -1;
|
|
else
|
|
lastc = *(pchar_ascii++);
|
|
|
|
if( lastc == '\n' )
|
|
++line;
|
|
|
|
return lastc;
|
|
}
|
|
|
|
|
|
int SpaceParser::ReadCharNoEscape()
|
|
{
|
|
if( reading_from_file )
|
|
{
|
|
if( input_as_utf8 )
|
|
return ReadUTF8Char();
|
|
else
|
|
return ReadASCIIChar();
|
|
}
|
|
else
|
|
{
|
|
if( reading_from_wchar_string )
|
|
{
|
|
return ReadCharFromWcharString();
|
|
}
|
|
else
|
|
{
|
|
if( input_as_utf8 )
|
|
return ReadCharFromUTF8String();
|
|
else
|
|
return ReadCharFromAsciiString();
|
|
}
|
|
}
|
|
}
|
|
|
|
bool SpaceParser::IsHexDigit(wchar_t c)
|
|
{
|
|
return ((c>='0' && c<='9') ||
|
|
(c>='a' && c<='f') ||
|
|
(c>='A' && c<='F') );
|
|
}
|
|
|
|
|
|
int SpaceParser::HexToInt(wchar_t c)
|
|
{
|
|
if( c>='0' && c<='9' )
|
|
return c - '0';
|
|
|
|
if( c>='a' && c<='f' )
|
|
return c - 'a' + 10;
|
|
|
|
if( c>='A' && c<='F' )
|
|
return c - 'A' + 10;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
void SpaceParser::ReadUnicodeCodePoint()
|
|
{
|
|
wchar_t c;
|
|
int value = 0;
|
|
|
|
for(int i=0 ; i<4 ; ++i)
|
|
{
|
|
c = ReadCharNoEscape();
|
|
|
|
if( !IsHexDigit(c) )
|
|
{
|
|
status = syntax_error;
|
|
return;
|
|
}
|
|
|
|
value = (value << 4) | HexToInt(c);
|
|
}
|
|
|
|
lastc = (wchar_t)value;
|
|
}
|
|
|
|
|
|
int SpaceParser::ReadChar()
|
|
{
|
|
char_was_escaped = false;
|
|
ReadCharNoEscape();
|
|
|
|
if( use_escape_char && lastc == '\\' )
|
|
{
|
|
char_was_escaped = true;
|
|
ReadCharNoEscape();
|
|
|
|
switch(lastc)
|
|
{
|
|
case '0': lastc = 0; break;
|
|
case 't': lastc = '\t'; break;
|
|
case 'r': lastc = '\r'; break;
|
|
case 'n': lastc = '\n'; break;
|
|
case 'b': lastc = 0x08; break;
|
|
case 'f': lastc = 0x0c; break;
|
|
case 'u': ReadUnicodeCodePoint(); break;
|
|
// "in other cases we return the last character, so two \\ returns one \ "
|
|
}
|
|
}
|
|
|
|
return lastc;
|
|
}
|
|
|
|
|
|
|
|
} // namespace
|
|
|
|
|
|
|
|
|