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/*
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* Copyright (C) 2022 by Andreas Theofilu <andreas@theosys.at>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __TEXPATPP_H__
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#define __TEXPATPP_H__
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#include <string>
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#include <vector>
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#include <expat.h>
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#include "tvalidatefile.h"
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namespace Expat
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{
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/**
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* @enum _ETYPE_t
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* @brief Internal used type identifier for elements.
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*/
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typedef enum _ETYPE_t
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{
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_ET_START, //!< Element is a start element. Other elements with a bigger depth follow.
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_ET_END, //!< Element is an end element. Other elements with a bigger depth are before.
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_ET_ATOMIC //!< Element is a single one which starts and stop in one line.
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}_ETYPE_t;
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typedef struct _ATTRIBUTE_t
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{
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std::string name;
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std::string content;
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}_ATTRIBUTE_t;
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typedef _ATTRIBUTE_t ATTRIBUTE_t;
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typedef struct _ELEMENT_t
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{
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std::string name;
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int depth;
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std::string content;
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std::vector<_ATTRIBUTE_t> attrs;
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_ETYPE_t eType;
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}_ELEMENT_t;
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/**
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* @enum TENCODING_t
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* @brief Defines the possible integrated encodings.
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* If the encoding is not ENC_UTF8 it must be set before the parser is
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* started. The encoding defines the character set used for the XML file.
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* If the XML file is encoded in a different character set than defined,
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* it may lead into parsing errors.
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*/
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typedef enum TENCODING_t
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{
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ENC_UNKNOWN, //!< Unknown encoding. This is equal with ENC_UTF8
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ENC_UTF8, //!< Default encoding if not defined elsewhere
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ENC_UTF16, //!< UTF16 encoding.
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ENC_ISO_8859_1, //!< ISO-8859-1 encoding.
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ENC_CP1250, //!< CP1250 (Windows) character set.
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ENC_US_ASCII //!< US-ASCII encoding.
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}TENCODING_t;
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/**
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* @class TExpat
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* @brief C++ wrapper class for the XML parser expat.
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*
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* This class is a small C++ wrapper for the XML parser expat. Expat is part of
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* *NIX system and also in the NDK of Android. Therefor it is used in this
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* project.
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*/
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class TExpat : public TValidateFile
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{
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public:
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/**
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* Constructor.
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*/
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TExpat();
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/**
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* Constructor.
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*
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* @param file The file name of a file containing the XML code to parse.
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*/
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TExpat(const std::string& file);
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/**
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* Destructor.
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*/
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~TExpat();
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/**
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* @brief Sets the file to parse.
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* This method does not check the file. If it is invalid, the parser
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* will fail.
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*
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* @param file The file to parse.
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*/
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void setFile(const std::string& file) { mFile = file; }
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/**
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* @brief Set the encoding of the XML file.
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* By default UTF8 encoding is assumed if not explicitely defined
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* in the XML file. If there is an encoding defination in the XML
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* file like:
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*
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* <?xml version="1.0" encoding="ISO-8859-2"?>
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*
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* for example, than this encoding is used by default.
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*
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* This method sets the encoding to one of the supported encodings.
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* If the XML file is encoded in another character set as defined,
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* than it may come to errors during parsing!
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*
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* @param enc Encoding to be used for parsing the XML file.
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*/
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void setEncoding(TENCODING_t enc);
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/**
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* @brief Starts the XML parser.
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* This method invoke the XML parser. If any error occure and error
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* message is logged and the error handler is set.
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*
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* @return On success it returns TRUE and FALSE otherwise.
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*/
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bool parse(bool debug=false);
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/**
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* Retrieves the first element with the name \p name at the depth
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* \p depth.
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*
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* @param name The name of the wanted element. This is case
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* sensitive!
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* @param depth The depth where the element is.
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*
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* @return On success the content of the element is returned.
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* Otherwise an empty string is returned.
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*/
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std::string getElement(const std::string& name, int depth, bool *valid=nullptr);
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/**
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* Retrieves the first element with the name \p name at the depth
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* \p depth.
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*
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* @param name The name of the wanted element. This is case
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* sensitive!
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* @param depth The depth where the element is.
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* @param valid An optional pointer retrieving the state of the
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* search. On success it returns TRUE, otherwise FALSE.
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* @return On success the content of the element is returned as an
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* integer. Otherwise 0 is returned and \p valid is set to FALSE.
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*/
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int getElementInt(const std::string& name, int depth, bool *valid=nullptr);
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/**
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* Retrieves the first element with the name \p name at the depth
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* \p depth.
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*
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* @param name The name of the wanted element. This is case
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* sensitive!
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* @param depth The depth where the element is.
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* @param valid An optional pointer retrieving the state of the
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* search. On success it returns TRUE, otherwise FALSE.
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* @return On success the content of the element is returned as a
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* long integer. Otherwise 0 is returned and \p valid is set to FALSE.
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*/
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long getElementLong(const std::string& name, int depth, bool *valid=nullptr);
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/**
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* Retrieves the first element with the name \p name at the depth
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* \p depth.
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*
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* @param name The name of the wanted element. This is case
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* sensitive!
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* @param depth The depth where the element is.
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* @param valid An optional pointer retrieving the state of the
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* search. On success it returns TRUE, otherwise FALSE.
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* @return On success the content of the element is returned as a
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* floating value. Otherwise 0 is returned and \p valid is set to FALSE.
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*/
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float getElementFloat(const std::string& name, int depth, bool *valid=nullptr);
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/**
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* Retrieves the first element with the name \p name at the depth
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* \p depth.
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*
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* @param name The name of the wanted element. This is case
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* sensitive!
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* @param depth The depth where the element is.
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* @param valid An optional pointer retrieving the state of the
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* search. On success it returns TRUE, otherwise FALSE.
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* @return On success the content of the element is returned as a
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* double value. Otherwise 0 is returned and \p valid is set to FALSE.
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*/
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double getElementDouble(const std::string& name, int depth, bool *valid=nullptr);
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/**
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* Retrieves the first element with the name \p name at the depth
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* \p depth.
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*
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* @param name The name of the wanted element. This is case
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* sensitive!
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* @param depth The depth where the element is.
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*
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* @return On success returns the index of the element found.
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* Otherwise TExpat::npos is returned.
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*/
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size_t getElementIndex(const std::string& name, int depth);
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/**
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* @brief Retrieves the first element with the name \p name.
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* This method saves the found position internally. If no matching
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* entity was found, the internal position is set to an invalid
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* position.
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*
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* @param name The name of the wanted element. This is case
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* sensitive!
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* @param depth This parameter is optional and can be NULL. If it is
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* present, the method returns the depth of the found element with
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* this parameter. If the element was not found, this parameter
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* will contain -1.
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*
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* @return On success returns the index of the element found.
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* Otherwise TExpat::npos is returned.
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*/
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size_t getElementIndex(const std::string& name, int *depth);
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/**
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* Retrieves the \p name, the \p content and the attributes of the
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* element. If the element has no attributes, an empty attribute
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* list is returned.
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*
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* This method does not set the internal position. This means that
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* a method depending on the internal position like getNextElement()
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* will not succeed or return the content of another entity!
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*
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* @param index The index of the element. This value may be
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* retrieved by calling previously the method getElementIndex().
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* @param name This parameter can be NULL. If it is present, the
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* name of the element is returned.
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* @param content This parameter can be NULL. If it is present,
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* the content of the element is returned. If there was no content,
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* an empty string is returned.
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* @param attrs This parameter can be NULL. If it is present and if
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* the element contains at least 1 attribute, the attributes are
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* returned in the vector.
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*
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* @return If a valid element was found, the index is returned.
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* Otherwise TExpat::npos will be returned.
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*/
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size_t getElementFromIndex(size_t index, std::string *name, std::string *content, std::vector<ATTRIBUTE_t> *attrs);
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/**
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* @brief Retrieves the next element from the given index \p index.
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* The method succeeds if the next element is not an end tag or if
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* \p index is less than the number of total elements. The method
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* increases the index by 1 and returns this entity.
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*
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* This method does not set the internal position. This means that
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* a method depending on the internal position like getNextElement()
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* will not succeed or return the content of another entity!
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*
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* @param index The index of the element. This value may be
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* retrieved by calling previously the method getElementIndex().
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* @param name This parameter can be NULL. If it is present, the
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* name of the element is returned.
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* @param content This parameter can be NULL. If it is present,
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* the content of the element is returned. If there was no content,
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* an empty string is returned.
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* @param attrs This parameter can be NULL. If it is present and if
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* the element contains at least 1 attribute, the attributes are
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* returned in the vector.
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*
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* @return If a valid element was found, the index is returned.
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* Otherwise TExpat::npos will be returned.
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*/
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size_t getNextElementFromIndex(size_t index, std::string *name, std::string *content, std::vector<ATTRIBUTE_t> *attrs);
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/**
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* @brief Retrieves the first element with the name \p name.
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*
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* This method saves the found position internally. If no matching
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* entity was found, the internal position is set to an invalid
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* position.
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*
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* @param name The name of the wanted element.
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* @param depth A pointer to an integer. The method returns the
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* depth of the found element in this parameter.
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*
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* @return On success the content of the element is returned, if
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* any. Otherwise an error is logged and an empty string is returned.
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* The parameter \p depth is set to -1 on error.
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*/
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std::string getFirstElement(const std::string& name, int *depth);
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/**
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* Retrieves the next element in the list. This method depends on
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* the method getFirstElement(), which must be called previous.
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*
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* This method saves the found position internally. If no matching
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* entity was found, the internal position is set to an invalid
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* position.
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*
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* @param name The name of the element to search for. This
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* parameter is optional and may be NULL.
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* @param depth The depth of the element to return. If there are
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* no more elements with the name \p name and the depth \p depth
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* than an empty string is returned.
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*
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* @return On success the content of the element is returned. If
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* an error occurs an error message is logged and the error is set.
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*/
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std::string getNextElement(const std::string& name, int depth, bool *valid=nullptr);
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/**
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* Retrieves the next element in the list. This method depends on
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* the method getFirstElement(), which must be called previous.
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*
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* This method saves the found position internally. If no matching
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* entity was found, the internal position is set to an invalid
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* position.
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*
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* @param name The name of the element to search for. This
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* parameter is optional and may be NULL.
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* @param depth The depth of the element to return. If there are
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* no more elements with the name \p name and the depth \p depth
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* than an empty string is returned.
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*
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* @return On success the index of the element is returned. If
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* an error occurs an error message is logged and the error is set.
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*/
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size_t getNextElementIndex(const std::string& name, int depth);
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/**
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* Searches in the attribute list of an attribute called \p name
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* and returns the content.
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*
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* @param name The name of the wanted attribute.
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* @param attrs A vector list of attributes.
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*
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* @return On success returns the content of the attribute \p name.
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* Otherwise an empty string is returned.
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*/
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std::string getAttribute(const std::string& name, std::vector<ATTRIBUTE_t>& attrs);
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/**
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* Searches in the attribute list of an attribute called \p name
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* and returns the content.
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*
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* @param name The name of the wanted attribute.
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|
|
346 |
* @param attrs A vector list of attributes.
|
|
|
347 |
*
|
| 480 |
andreas |
348 |
* @return On success returns TRUE or FALSE depending on the
|
|
|
349 |
* content.
|
|
|
350 |
*/
|
|
|
351 |
bool getAttributeBool(const std::string& name, std::vector<ATTRIBUTE_t>& attrs);
|
|
|
352 |
/**
|
|
|
353 |
* Searches in the attribute list of an attribute called \p name
|
|
|
354 |
* and returns the content.
|
|
|
355 |
*
|
|
|
356 |
* @param name The name of the wanted attribute.
|
|
|
357 |
* @param attrs A vector list of attributes.
|
|
|
358 |
*
|
| 446 |
andreas |
359 |
* @return On success returns the content of the attribute \p name
|
|
|
360 |
* as an integer value.
|
|
|
361 |
* Otherwise an error text is set (TError) and 0 is returned.
|
|
|
362 |
*/
|
|
|
363 |
int getAttributeInt(const std::string& name, std::vector<ATTRIBUTE_t>& attrs);
|
|
|
364 |
/**
|
|
|
365 |
* Searches in the attribute list of an attribute called \p name
|
|
|
366 |
* and returns the content.
|
|
|
367 |
*
|
|
|
368 |
* @param name The name of the wanted attribute.
|
|
|
369 |
* @param attrs A vector list of attributes.
|
|
|
370 |
*
|
|
|
371 |
* @return On success returns the content of the attribute \p name
|
|
|
372 |
* as a long value.
|
|
|
373 |
* Otherwise an error text is set (TError) and 0 is returned.
|
|
|
374 |
*/
|
|
|
375 |
long getAttributeLong(const std::string& name, std::vector<ATTRIBUTE_t>& attrs);
|
|
|
376 |
/**
|
|
|
377 |
* Searches in the attribute list of an attribute called \p name
|
|
|
378 |
* and returns the content.
|
|
|
379 |
*
|
|
|
380 |
* @param name The name of the wanted attribute.
|
|
|
381 |
* @param attrs A vector list of attributes.
|
|
|
382 |
*
|
|
|
383 |
* @return On success returns the content of the attribute \p name
|
|
|
384 |
* as a floating value.
|
|
|
385 |
* Otherwise an error text is set (TError) and 0 is returned.
|
|
|
386 |
*/
|
|
|
387 |
float getAttributeFloat(const std::string& name, std::vector<ATTRIBUTE_t>& attrs);
|
|
|
388 |
/**
|
|
|
389 |
* Searches in the attribute list of an attribute called \p name
|
|
|
390 |
* and returns the content.
|
|
|
391 |
*
|
|
|
392 |
* @param name The name of the wanted attribute.
|
|
|
393 |
* @param attrs A vector list of attributes.
|
|
|
394 |
*
|
|
|
395 |
* @return On success returns the content of the attribute \p name
|
|
|
396 |
* as a double precission floating value.
|
|
|
397 |
* Otherwise an error text is set (TError) and 0 is returned.
|
|
|
398 |
*/
|
|
|
399 |
double getAttributeDouble(const std::string& name, std::vector<ATTRIBUTE_t>& attrs);
|
|
|
400 |
/**
|
| 480 |
andreas |
401 |
* Converts a string into a boolean.
|
|
|
402 |
*
|
|
|
403 |
* @param content A string containing numbers.
|
|
|
404 |
* @return Returns the boolean value.
|
|
|
405 |
*/
|
|
|
406 |
bool convertElementToBool(const std::string& content);
|
|
|
407 |
/**
|
| 446 |
andreas |
408 |
* Converts a string into an integer value.
|
|
|
409 |
*
|
|
|
410 |
* @param content A string containing numbers.
|
|
|
411 |
* @return On success returns the value representation of the
|
|
|
412 |
* \p content. If not convertable, TError is set and 0 is returned.
|
|
|
413 |
*/
|
|
|
414 |
int convertElementToInt(const std::string& content);
|
|
|
415 |
/**
|
|
|
416 |
* Converts a string into a long integer value.
|
|
|
417 |
*
|
|
|
418 |
* @param content A string containing numbers.
|
|
|
419 |
* @return On success returns the value representation of the
|
|
|
420 |
* \p content. If not convertable, TError is set and 0 is returned.
|
|
|
421 |
*/
|
|
|
422 |
long convertElementToLong(const std::string& content);
|
|
|
423 |
/**
|
|
|
424 |
* Converts a string into a floating value.
|
|
|
425 |
*
|
|
|
426 |
* @param content A string containing numbers.
|
|
|
427 |
* @return On success returns the value representation of the
|
|
|
428 |
* \p content. If not convertable, TError is set and 0 is returned.
|
|
|
429 |
*/
|
|
|
430 |
float convertElementToFloat(const std::string& content);
|
|
|
431 |
/**
|
|
|
432 |
* Converts a string into a double floating value.
|
|
|
433 |
*
|
|
|
434 |
* @param content A string containing numbers.
|
|
|
435 |
* @return On success returns the value representation of the
|
|
|
436 |
* \p content. If not convertable, TError is set and 0 is returned.
|
|
|
437 |
*/
|
|
|
438 |
double convertElementToDouble(const std::string& content);
|
|
|
439 |
/**
|
|
|
440 |
* Sets the internal pointer to the \p index. If this points to an
|
|
|
441 |
* invalid index, the method sets an error and returns FALSE.
|
|
|
442 |
*
|
|
|
443 |
* @param index The index into the internal XML list.
|
|
|
444 |
* @return On success it returns TRUE.
|
|
|
445 |
*/
|
|
|
446 |
bool setIndex(size_t index);
|
|
|
447 |
/**
|
|
|
448 |
* Retrieves the attribute list from the current position.
|
|
|
449 |
*
|
|
|
450 |
* @return On success the attributes of the current position are
|
|
|
451 |
* returned. If the current position is at the end or doesn't
|
|
|
452 |
* has attributes, an empty list is returned.
|
|
|
453 |
*/
|
|
|
454 |
std::vector<ATTRIBUTE_t> getAttributes();
|
|
|
455 |
/**
|
|
|
456 |
* Retrieves the attribute list from the \p index.
|
|
|
457 |
*
|
|
|
458 |
* @return On success the attributes of the position \p index are
|
|
|
459 |
* returned. If the position \p index is at the end or doesn't
|
|
|
460 |
* has attributes, an empty list is returned.
|
|
|
461 |
*/
|
|
|
462 |
std::vector<ATTRIBUTE_t> getAttributes(size_t index);
|
|
|
463 |
|
|
|
464 |
/**
|
|
|
465 |
* Checks whether the internal pointer points to a valid entry or
|
|
|
466 |
* not. If the internal pointer is valid it returns the name of the
|
|
|
467 |
* entity the pointer points to.
|
|
|
468 |
*
|
|
|
469 |
* @param valid This is an optional parameter. If this is set, then
|
|
|
470 |
* it is set to TRUE when the method succeeds and to FALSE
|
|
|
471 |
* otherwise.
|
|
|
472 |
*
|
|
|
473 |
* @return On success it returns the name of the entity and set the
|
|
|
474 |
* parameter \p valid to TRUE. On error it returns an empty string
|
|
|
475 |
* and sets the parameter \p valid to FALSE.
|
|
|
476 |
*/
|
|
|
477 |
std::string getElementName(bool *valid=nullptr);
|
|
|
478 |
/**
|
|
|
479 |
* Checks whether the internal pointer points to a valid entry or
|
|
|
480 |
* not. If the internal pointer is valid it returns the content of
|
|
|
481 |
* the entity the pointer points to.
|
|
|
482 |
*
|
|
|
483 |
* @param valid This is an optional parameter. If this is set, then
|
|
|
484 |
* it is set to TRUE when the method succeeds and to FALSE
|
|
|
485 |
* otherwise.
|
|
|
486 |
*
|
|
|
487 |
* @return On success it returns the content of the entity and set
|
|
|
488 |
* the parameter \p valid to TRUE. On error it returns an empty
|
|
|
489 |
* string and sets the parameter \p valid to FALSE.
|
|
|
490 |
*/
|
|
|
491 |
std::string getElementContent(bool *valid=nullptr);
|
|
|
492 |
/**
|
|
|
493 |
* Checks whether the internal pointer points to a valid entry or
|
|
|
494 |
* not. If the internal pointer is valid it returns the content of
|
|
|
495 |
* the entity converted to an integer.
|
|
|
496 |
*
|
|
|
497 |
* @param valid This is an optional parameter. If this is set, then
|
|
|
498 |
* it is set to TRUE when the method succeeds and to FALSE
|
|
|
499 |
* otherwise.
|
|
|
500 |
*
|
|
|
501 |
* @return On success it returns the content of the entity converted
|
|
|
502 |
* to an integer and set the parameter \p valid to TRUE. On error
|
|
|
503 |
* it returns an empty string and sets the parameter \p valid to
|
|
|
504 |
* FALSE.
|
|
|
505 |
*/
|
|
|
506 |
int getElementContentInt(bool *valid=nullptr);
|
|
|
507 |
/**
|
|
|
508 |
* Checks whether the internal pointer points to a valid entry or
|
|
|
509 |
* not. If the internal pointer is valid it returns the content of
|
|
|
510 |
* the entity converted to a long.
|
|
|
511 |
*
|
|
|
512 |
* @param valid This is an optional parameter. If this is set, then
|
|
|
513 |
* it is set to TRUE when the method succeeds and to FALSE
|
|
|
514 |
* otherwise.
|
|
|
515 |
*
|
|
|
516 |
* @return On success it returns the content of the entity converted
|
|
|
517 |
* to a long and set the parameter \p valid to TRUE. On error
|
|
|
518 |
* it returns an empty string and sets the parameter \p valid to
|
|
|
519 |
* FALSE.
|
|
|
520 |
*/
|
|
|
521 |
long getElementContentLong(bool *valid=nullptr);
|
|
|
522 |
/**
|
|
|
523 |
* Checks whether the internal pointer points to a valid entry or
|
|
|
524 |
* not. If the internal pointer is valid it returns the content of
|
|
|
525 |
* the entity converted to a floating value.
|
|
|
526 |
*
|
|
|
527 |
* @param valid This is an optional parameter. If this is set, then
|
|
|
528 |
* it is set to TRUE when the method succeeds and to FALSE
|
|
|
529 |
* otherwise.
|
|
|
530 |
*
|
|
|
531 |
* @return On success it returns the content of the entity converted
|
|
|
532 |
* to a float and set the parameter \p valid to TRUE. On error
|
|
|
533 |
* it returns an empty string and sets the parameter \p valid to
|
|
|
534 |
* FALSE.
|
|
|
535 |
*/
|
|
|
536 |
float getElementContentFloat(bool *valid=nullptr);
|
|
|
537 |
/**
|
|
|
538 |
* Checks whether the internal pointer points to a valid entry or
|
|
|
539 |
* not. If the internal pointer is valid it returns the content of
|
|
|
540 |
* the entity converted to a double.
|
|
|
541 |
*
|
|
|
542 |
* @param valid This is an optional parameter. If this is set, then
|
|
|
543 |
* it is set to TRUE when the method succeeds and to FALSE
|
|
|
544 |
* otherwise.
|
|
|
545 |
*
|
|
|
546 |
* @return On success it returns the content of the entity converted
|
|
|
547 |
* to a double and set the parameter \p valid to TRUE. On error
|
|
|
548 |
* it returns an empty string and sets the parameter \p valid to
|
|
|
549 |
* FALSE.
|
|
|
550 |
*/
|
|
|
551 |
double getElementContentDouble(bool *valid=nullptr);
|
|
|
552 |
|
|
|
553 |
static const size_t npos = static_cast<size_t>(-1); //!< Marks an invalid index
|
|
|
554 |
|
|
|
555 |
protected:
|
|
|
556 |
static void startElement(void* userData, const XML_Char* name, const XML_Char** attrs);
|
|
|
557 |
static void XMLCALL endElement(void *userData, const XML_Char *name);
|
|
|
558 |
static void XMLCALL CharacterDataHandler(void *, const XML_Char *s, int len);
|
|
|
559 |
static int cp1250_encoding_handler(void*, const XML_Char* encoding, XML_Encoding* info);
|
|
|
560 |
|
|
|
561 |
private:
|
|
|
562 |
static void createCP1250Encoding(XML_Encoding *enc); //!< Internal handler to handle CP1250 encoded files.
|
|
|
563 |
|
|
|
564 |
std::string mFile; //!< The name of a file containing the XML code to parse
|
|
|
565 |
std::vector<_ELEMENT_t> mElements; //!< The list of elemets in the order they appeared
|
|
|
566 |
std::vector<_ELEMENT_t>::iterator mLastIter{mElements.end()}; //!< The pointer to the last iterator
|
|
|
567 |
std::string mEncoding{"UTF-8"}; //!< Encoding of the XML file. UTF-8 is default encoding.
|
|
|
568 |
TENCODING_t mSetEncoding{ENC_UTF8}; //!< Encoding of the XML file. UTF-8 is default encoding.
|
|
|
569 |
// int mLastDepth{0}; //!< The depth of the last found element.
|
|
|
570 |
// Variables used for the static methods
|
|
|
571 |
static int mDepth;
|
|
|
572 |
static std::string mContent;
|
|
|
573 |
static std::string mLastName;
|
|
|
574 |
static std::vector<_ATTRIBUTE_t> mAttributes;
|
|
|
575 |
};
|
|
|
576 |
}
|
|
|
577 |
|
|
|
578 |
#endif
|