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Diffstat (limited to 'src/extras/ini_parser.hpp')
| -rw-r--r-- | src/extras/ini_parser.hpp | 314 |
1 files changed, 314 insertions, 0 deletions
diff --git a/src/extras/ini_parser.hpp b/src/extras/ini_parser.hpp new file mode 100644 index 00000000..99acf1ee --- /dev/null +++ b/src/extras/ini_parser.hpp @@ -0,0 +1,314 @@ +/* + * 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 + |