1 /**

     2  * Relational pipes

     3  * Copyright © 2019 František Kučera (Frantovo.cz, GlobalCode.info)

     4  *

     5  * This program is free software: you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation, either version 3 of the License, or

     8  * (at your option) any later version.

     9  *

    10  * This program is distributed in the hope that it will be useful,

    11  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

    13  * GNU General Public License for more details.

    14  *

    15  * You should have received a copy of the GNU General Public License

    16  * along with this program. If not, see <http://www.gnu.org/licenses/>.

    17  */

    18 #pragma once

    19 

    20 #include <string>

    21 #include <codecvt>

    22 

    23 #include <xercesc/util/XMLString.hpp>

    24 

    25 #include <relpipe/writer/typedefs.h>

    26 

    27 namespace relpipe {

    28 namespace in {

    29 namespace xml {

    30 

    31 using namespace std;

    32 using namespace xercesc;

    33 using namespace relpipe::writer;

    34 

    35 class XercesStringConvertor {

    36 private:

    37 	wstring_convert<codecvt_utf8<wchar_t>> convertor; // TODO: support also other encodings.

    38 

    39 public:

    40 

    41 	string_t toString(const XMLCh * const chars) {

    42 		// XMLCh = char16_t

    43 		// „All XML data is handled within Xerces-C++ as strings of XMLCh characters. Regardless of the size of the type chosen, the data stored in variables of type XMLCh will always be utf-16 encoded values.“

    44 		// see https://xerces.apache.org/xerces-c/program-others-3.html

    45 		// other solution (depends on boost): https://flylib.com/books/en/2.131.1/working_with_xerces_strings.html

    46 

    47 		// TODO: review this text conversion and test on various platforms

    48 		char* x = XMLString::transcode(chars);

    49 		string s = string(x);

    50 		XMLString::release(&x);

    51 		return convertor.from_bytes(s);

    52 	}

    53 };

    54 

    55 }

    56 }

    57 }