2020-09-30 17:02:47 +00:00
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/*
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2021-01-01 20:06:01 +00:00
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* Copyright (c) 2013-2015 Denilson das Mercês Amorim <dma_2012@hotmail.com>
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2020-09-30 17:02:47 +00:00
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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*
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* 3. This notice may not be removed or altered from any source
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* distribution.
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*
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*/
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#ifndef LINB_INI_PARSER_HPP
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#define LINB_INI_PARSER_HPP
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/*
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* STL-like INI Container
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*/
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#include <string> // for std::string
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#include <map> // for std::map
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#include <cstdio> // for std::FILE
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#include <algorithm> // for std::find_if
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#include <functional> // for std::function
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namespace linb
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{
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template<
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class CharT = char, /* Not compatible with other type here, since we're using C streams */
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class StringType = std::basic_string<CharT>,
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class KeyContainer = std::map<StringType, StringType>,
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class SectionContainer = std::map<StringType, KeyContainer>
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> class basic_ini
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{
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public:
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typedef CharT char_type;
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typedef StringType string_type;
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typedef KeyContainer key_container;
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typedef SectionContainer section_container;
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// Typedef container values types
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typedef typename section_container::value_type value_type;
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typedef typename section_container::key_type key_type;
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typedef typename section_container::mapped_type mapped_type;
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// Typedef common types
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typedef typename section_container::size_type size_type;
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typedef typename section_container::difference_type difference_type;
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// Typedef iterators
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typedef typename section_container::iterator iterator;
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typedef typename section_container::const_iterator const_iterator;
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typedef typename section_container::reverse_iterator reverse_iterator;
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typedef typename section_container::const_reverse_iterator const_reverse_iterator;
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// typedef References and pointers
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typedef typename section_container::reference reference;
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typedef typename section_container::const_reference const_reference;
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typedef typename section_container::pointer pointer;
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typedef typename section_container::const_pointer const_pointer;
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private:
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section_container data;
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public:
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basic_ini()
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{ }
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basic_ini(const char_type* filename)
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{ this->read_file(filename); }
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/* Iterator methods */
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iterator begin()
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{ return data.begin(); }
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const_iterator begin() const
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{ return data.begin(); }
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iterator end()
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{ return data.end(); }
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const_iterator end() const
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{ return data.end(); }
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const_iterator cbegin() const
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{ return data.cbegin(); }
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const_iterator cend() const
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{ return data.cend(); }
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/* Reverse iterator methods */
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reverse_iterator rbegin()
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{ return data.rbegin(); }
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const_reverse_iterator rbegin() const
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{ return data.rbegin(); }
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reverse_iterator rend()
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{ return data.rend(); }
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const_reverse_iterator rend() const
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{ return data.rend(); }
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const_reverse_iterator crbegin() const
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{ return data.crbegin(); }
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const_reverse_iterator crend() const
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{ return data.crend(); }
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/* Acessing index methods */
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mapped_type& operator[](const string_type& sect)
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{ return data[sect]; }
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mapped_type& operator[](string_type&& sect)
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{ return data[std::forward<string_type>(sect)]; }
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mapped_type& at( const string_type& sect)
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{ return data.at(sect); }
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const mapped_type& at(const string_type& sect) const
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{ return data.at(sect); }
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/* Capacity information */
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bool empty() const
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{ return data.empty(); }
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size_type size() const
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{ return data.size(); }
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size_type max_size() const
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{ return data.max_size(); }
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/* Modifiers */
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void clear()
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{ return data.clear(); }
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/* Lookup */
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size_type count(const string_type& sect)
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{ return data.count(sect); }
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iterator find(const string_type& sect)
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{ return data.find(sect); }
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/* Gets a value from the specified section & key, default_value is returned if the sect & key doesn't exist */
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string_type get(const string_type& sect, const key_type& key, const string_type& default_value)
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{
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auto it = this->find(sect);
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if(it != this->end())
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{
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auto itv = it->second.find(key);
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if(itv != it->second.end())
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return itv->second;
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}
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return default_value;
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}
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/* Sets the value of a value in the ini */
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void set(const string_type& sect, const key_type& key, const string_type& value)
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{
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(*this)[sect][key] = value; // no emplace since overwrite!
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}
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/* Too lazy to continue this container... If you need more methods, just add it */
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#if 1
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bool read_file(const char_type* filename)
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{
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/* Using C stream in a STL-like container, funny?
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*/
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if(FILE* f = fopen(filename, "r"))
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{
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key_container* keys = nullptr;
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char_type buf[2048];
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string_type line;
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string_type key;
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string_type value;
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string_type null_string;
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size_type pos;
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// Trims an string
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auto trim = [](string_type& s, bool trimLeft, bool trimRight) -> string_type&
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{
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if(s.size())
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{
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// Ignore UTF-8 BOM
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while(s.size() >= 3 && s[0] == (char)(0xEF) && s[1] == (char)(0xBB) && s[2] == (char)(0xBF))
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s.erase(s.begin(), s.begin() + 3);
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if(trimLeft)
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s.erase(s.begin(), std::find_if(s.begin(), s.end(), std::not1(std::function<int(int)>(::isspace))));
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if(trimRight)
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s.erase(std::find_if(s.rbegin(), s.rend(), std::not1(std::function<int(int)>(::isspace))).base(), s.end());
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}
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return s;
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};
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// Start parsing
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while(fgets(buf, sizeof(buf), f))
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{
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// What a thing, reading into a char buffer and then putting in the string...
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line = buf;
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// Find comment and remove anything after it from the line
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if((pos = line.find_first_of(';')) != line.npos)
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line.erase(pos);
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// Trim the string, and if it gets empty, skip this line
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if(trim(line, true, true).empty())
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continue;
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// Find section name
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if(line.front() == '[' && line.back() == ']')
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{
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pos = line.length() - 1; //line.find_first_of(']');
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if(pos != line.npos)
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{
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trim(key.assign(line, 1, pos-1), true, true);
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keys = &data[std::move(key)]; // Create section
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}
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else
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keys = nullptr;
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}
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else
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{
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// Find key and value positions
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pos = line.find_first_of('=');
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if(pos == line.npos)
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{
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// There's only the key
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key = line; // No need for trim, line is already trimmed
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value.clear();
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}
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else
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{
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// There's the key and the value
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trim(key.assign(line, 0, pos), false, true); // trim the right
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trim(value.assign(line, pos + 1, line.npos), true, false); // trim the left
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}
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// Put the key/value into the current keys object, or into the section "" if no section has been found
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#if __cplusplus >= 201103L || _MSC_VER >= 1800
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(keys ? *keys : data[null_string]).emplace(std::move(key), std::move(value));
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#else
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(keys ? *keys : data[null_string])[key] = value;
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key.clear(); value.clear();
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#endif
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}
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}
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fclose(f);
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return true;
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}
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return false;
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}
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/*
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* Dumps the content of this container into an ini file
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*/
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bool write_file(const char_type* filename)
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{
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if(FILE* f = fopen(filename, "w"))
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{
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bool first = true;
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for(auto& sec : this->data)
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{
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fprintf(f, first? "[%s]\n" : "\n[%s]\n", sec.first.c_str());
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first = false;
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for(auto& kv : sec.second)
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{
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if(kv.second.empty())
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fprintf(f, "%s\n", kv.first.c_str());
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else
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fprintf(f, "%s = %s\n", kv.first.c_str(), kv.second.c_str());
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}
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}
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fclose(f);
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return true;
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}
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return false;
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}
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/*
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*/
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bool load_file(const char_type* filename)
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{
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return read_file(filename);
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}
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bool load_file(const StringType& filename)
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{
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return load_file(filename.c_str());
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}
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bool write_file(const StringType& filename)
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{
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return write_file(filename.c_str());
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}
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#endif
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};
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/* Use default basic_ini
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*
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* Limitations:
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* * Not unicode aware
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* * Case sensitive
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* * Sections must have unique keys
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*/
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typedef basic_ini<> ini;
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}
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#endif
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