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authoreray orçunus <erayorcunus@gmail.com>2020-09-30 19:02:47 +0200
committereray orçunus <erayorcunus@gmail.com>2020-09-30 19:03:01 +0200
commit595421da3908a2d3e7a1b063605bb3f2a3adb65b (patch)
tree1fe2f8eb9da450d5f8efdb27f1b9cbd8d541e01c /src/extras/ini_parser.hpp
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+/*
+ * Copyright (c) 2013-2015 Denilson das Mercês Amorim <dma_2012@hotmail.com>
+ *
+ * This software is provided 'as-is', without any express or implied
+ * warranty. In no event will the authors be held liable for any damages
+ * arising from the use of this software.
+ *
+ * Permission is granted to anyone to use this software for any purpose,
+ * including commercial applications, and to alter it and redistribute it
+ * freely, subject to the following restrictions:
+ *
+ * 1. The origin of this software must not be misrepresented; you must not
+ * claim that you wrote the original software. If you use this software
+ * in a product, an acknowledgment in the product documentation would be
+ * appreciated but is not required.
+ *
+ * 2. Altered source versions must be plainly marked as such, and must not be
+ * misrepresented as being the original software.
+ *
+ * 3. This notice may not be removed or altered from any source
+ * distribution.
+ *
+ */
+#ifndef LINB_INI_PARSER_HPP
+#define LINB_INI_PARSER_HPP
+
+/*
+ * STL-like INI Container
+ */
+
+#include <string> // for std::string
+#include <map> // for std::map
+#include <cstdio> // for std::FILE
+#include <algorithm> // for std::find_if
+#include <functional> // for std::function
+
+namespace linb
+{
+ template<
+ class CharT = char, /* Not compatible with other type here, since we're using C streams */
+ class StringType = std::basic_string<CharT>,
+ class KeyContainer = std::map<StringType, StringType>,
+ class SectionContainer = std::map<StringType, KeyContainer>
+ > class basic_ini
+ {
+ public:
+ typedef CharT char_type;
+ typedef StringType string_type;
+ typedef KeyContainer key_container;
+ typedef SectionContainer section_container;
+
+ // Typedef container values types
+ typedef typename section_container::value_type value_type;
+ typedef typename section_container::key_type key_type;
+ typedef typename section_container::mapped_type mapped_type;
+
+ // Typedef common types
+ typedef typename section_container::size_type size_type;
+ typedef typename section_container::difference_type difference_type;
+
+ // Typedef iterators
+ typedef typename section_container::iterator iterator;
+ typedef typename section_container::const_iterator const_iterator;
+ typedef typename section_container::reverse_iterator reverse_iterator;
+ typedef typename section_container::const_reverse_iterator const_reverse_iterator;
+
+ // typedef References and pointers
+ typedef typename section_container::reference reference;
+ typedef typename section_container::const_reference const_reference;
+ typedef typename section_container::pointer pointer;
+ typedef typename section_container::const_pointer const_pointer;
+
+ private:
+ section_container data;
+
+ public:
+
+ basic_ini()
+ { }
+
+ basic_ini(const char_type* filename)
+ { this->read_file(filename); }
+
+ /* Iterator methods */
+ iterator begin()
+ { return data.begin(); }
+ const_iterator begin() const
+ { return data.begin(); }
+ iterator end()
+ { return data.end(); }
+ const_iterator end() const
+ { return data.end(); }
+ const_iterator cbegin() const
+ { return data.cbegin(); }
+ const_iterator cend() const
+ { return data.cend(); }
+
+ /* Reverse iterator methods */
+ reverse_iterator rbegin()
+ { return data.rbegin(); }
+ const_reverse_iterator rbegin() const
+ { return data.rbegin(); }
+ reverse_iterator rend()
+ { return data.rend(); }
+ const_reverse_iterator rend() const
+ { return data.rend(); }
+ const_reverse_iterator crbegin() const
+ { return data.crbegin(); }
+ const_reverse_iterator crend() const
+ { return data.crend(); }
+
+ /* Acessing index methods */
+ mapped_type& operator[](const string_type& sect)
+ { return data[sect]; }
+ mapped_type& operator[](string_type&& sect)
+ { return data[std::forward<string_type>(sect)]; }
+ mapped_type& at( const string_type& sect)
+ { return data.at(sect); }
+ const mapped_type& at(const string_type& sect) const
+ { return data.at(sect); }
+
+ /* Capacity information */
+ bool empty() const
+ { return data.empty(); }
+ size_type size() const
+ { return data.size(); }
+ size_type max_size() const
+ { return data.max_size(); }
+
+ /* Modifiers */
+ void clear()
+ { return data.clear(); }
+
+ /* Lookup */
+ size_type count(const string_type& sect)
+ { return data.count(sect); }
+ iterator find(const string_type& sect)
+ { return data.find(sect); }
+
+ /* Gets a value from the specified section & key, default_value is returned if the sect & key doesn't exist */
+ string_type get(const string_type& sect, const key_type& key, const string_type& default_value)
+ {
+ auto it = this->find(sect);
+ if(it != this->end())
+ {
+ auto itv = it->second.find(key);
+ if(itv != it->second.end())
+ return itv->second;
+ }
+ return default_value;
+ }
+
+ /* Sets the value of a value in the ini */
+ void set(const string_type& sect, const key_type& key, const string_type& value)
+ {
+ (*this)[sect][key] = value; // no emplace since overwrite!
+ }
+
+ /* Too lazy to continue this container... If you need more methods, just add it */
+
+
+#if 1
+ bool read_file(const char_type* filename)
+ {
+ /* Using C stream in a STL-like container, funny?
+ */
+ if(FILE* f = fopen(filename, "r"))
+ {
+ key_container* keys = nullptr;
+ char_type buf[2048];
+ string_type line;
+ string_type key;
+ string_type value;
+ string_type null_string;
+ size_type pos;
+
+ // Trims an string
+ auto trim = [](string_type& s, bool trimLeft, bool trimRight) -> string_type&
+ {
+ if(s.size())
+ {
+ // Ignore UTF-8 BOM
+ while(s.size() >= 3 && s[0] == (char)(0xEF) && s[1] == (char)(0xBB) && s[2] == (char)(0xBF))
+ s.erase(s.begin(), s.begin() + 3);
+
+ if(trimLeft)
+ s.erase(s.begin(), std::find_if(s.begin(), s.end(), std::not1(std::function<int(int)>(::isspace))));
+ if(trimRight)
+ s.erase(std::find_if(s.rbegin(), s.rend(), std::not1(std::function<int(int)>(::isspace))).base(), s.end());
+ }
+ return s;
+ };
+
+ // Start parsing
+ while(fgets(buf, sizeof(buf), f))
+ {
+ // What a thing, reading into a char buffer and then putting in the string...
+ line = buf;
+
+ // Find comment and remove anything after it from the line
+ if((pos = line.find_first_of(';')) != line.npos)
+ line.erase(pos);
+
+ // Trim the string, and if it gets empty, skip this line
+ if(trim(line, true, true).empty())
+ continue;
+
+ // Find section name
+ if(line.front() == '[' && line.back() == ']')
+ {
+ pos = line.length() - 1; //line.find_first_of(']');
+ if(pos != line.npos)
+ {
+ trim(key.assign(line, 1, pos-1), true, true);
+ keys = &data[std::move(key)]; // Create section
+ }
+ else
+ keys = nullptr;
+ }
+ else
+ {
+ // Find key and value positions
+ pos = line.find_first_of('=');
+ if(pos == line.npos)
+ {
+ // There's only the key
+ key = line; // No need for trim, line is already trimmed
+ value.clear();
+ }
+ else
+ {
+ // There's the key and the value
+ trim(key.assign(line, 0, pos), false, true); // trim the right
+ trim(value.assign(line, pos + 1, line.npos), true, false); // trim the left
+ }
+
+ // Put the key/value into the current keys object, or into the section "" if no section has been found
+ #if __cplusplus >= 201103L || _MSC_VER >= 1800
+ (keys ? *keys : data[null_string]).emplace(std::move(key), std::move(value));
+ #else
+ (keys ? *keys : data[null_string])[key] = value;
+ key.clear(); value.clear();
+ #endif
+ }
+ }
+
+ fclose(f);
+ return true;
+ }
+ return false;
+ }
+
+ /*
+ * Dumps the content of this container into an ini file
+ */
+ bool write_file(const char_type* filename)
+ {
+ if(FILE* f = fopen(filename, "w"))
+ {
+ bool first = true;
+ for(auto& sec : this->data)
+ {
+ fprintf(f, first? "[%s]\n" : "\n[%s]\n", sec.first.c_str());
+ first = false;
+ for(auto& kv : sec.second)
+ {
+ if(kv.second.empty())
+ fprintf(f, "%s\n", kv.first.c_str());
+ else
+ fprintf(f, "%s = %s\n", kv.first.c_str(), kv.second.c_str());
+ }
+ }
+ fclose(f);
+ return true;
+ }
+ return false;
+ }
+
+
+ /*
+ */
+ bool load_file(const char_type* filename)
+ {
+ return read_file(filename);
+ }
+
+ bool load_file(const StringType& filename)
+ {
+ return load_file(filename.c_str());
+ }
+
+ bool write_file(const StringType& filename)
+ {
+ return write_file(filename.c_str());
+ }
+#endif
+
+
+
+ };
+
+
+ /* Use default basic_ini
+ *
+ * Limitations:
+ * * Not unicode aware
+ * * Case sensitive
+ * * Sections must have unique keys
+ */
+ typedef basic_ini<> ini;
+}
+
+#endif
+