789 lines
19 KiB
C++
789 lines
19 KiB
C++
/*
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* The MIT License (MIT)
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* Copyright (c) 2018 Danijel Durakovic
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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* of the Software, and to permit persons to whom the Software is furnished to do
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* so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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///////////////////////////////////////////////////////////////////////////////
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//
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// /mINI/ v0.9.14
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// An INI file reader and writer for the modern age.
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//
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///////////////////////////////////////////////////////////////////////////////
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//
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// A tiny utility library for manipulating INI files with a straightforward
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// API and a minimal footprint. It conforms to the (somewhat) standard INI
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// format - sections and keys are case insensitive and all leading and
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// trailing whitespace is ignored. Comments are lines that begin with a
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// semicolon. Trailing comments are allowed on section lines.
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//
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// Files are read on demand, upon which data is kept in memory and the file
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// is closed. This utility supports lazy writing, which only writes changes
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// and updates to a file and preserves custom formatting and comments. A lazy
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// write invoked by a write() call will read the output file, find what
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// changes have been made and update the file accordingly. If you only need to
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// generate files, use generate() instead. Section and key order is preserved
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// on read, write and insert.
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//
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///////////////////////////////////////////////////////////////////////////////
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//
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// /* BASIC USAGE EXAMPLE: */
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//
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// /* read from file */
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// mINI::INIFile file("myfile.ini");
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// mINI::INIStructure ini;
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// file.read(ini);
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//
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// /* read value; gets a reference to actual value in the structure.
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// if key or section don't exist, a new empty value will be created */
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// std::string& value = ini["section"]["key"];
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//
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// /* read value safely; gets a copy of value in the structure.
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// does not alter the structure */
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// std::string value = ini.get("section").get("key");
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//
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// /* set or update values */
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// ini["section"]["key"] = "value";
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//
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// /* set multiple values */
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// ini["section2"].set({
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// {"key1", "value1"},
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// {"key2", "value2"}
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// });
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//
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// /* write updates back to file, preserving comments and formatting */
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// file.write(ini);
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//
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// /* or generate a file (overwrites the original) */
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// file.generate(ini);
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//
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///////////////////////////////////////////////////////////////////////////////
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//
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// Long live the INI file!!!
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//
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///////////////////////////////////////////////////////////////////////////////
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#ifndef MINI_INI_H_
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#define MINI_INI_H_
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#include <string>
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#include <sstream>
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#include <algorithm>
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#include <utility>
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#include <unordered_map>
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#include <vector>
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#include <memory>
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#include <fstream>
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#include <sys/stat.h>
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#include <cctype>
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namespace mINI
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{
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namespace INIStringUtil
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{
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const char* const whitespaceDelimiters = " \t\n\r\f\v";
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inline void trim(std::string& str)
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{
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str.erase(str.find_last_not_of(whitespaceDelimiters) + 1);
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str.erase(0, str.find_first_not_of(whitespaceDelimiters));
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}
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#ifndef MINI_CASE_SENSITIVE
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inline void toLower(std::string& str)
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{
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std::transform(str.begin(), str.end(), str.begin(), [](const char c) {
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return static_cast<char>(std::tolower(c));
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});
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}
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#endif
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inline void replace(std::string& str, std::string const& a, std::string const& b)
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{
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if (!a.empty())
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{
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std::size_t pos = 0;
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while ((pos = str.find(a, pos)) != std::string::npos)
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{
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str.replace(pos, a.size(), b);
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pos += b.size();
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}
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}
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}
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#ifdef _WIN32
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const char* const endl = "\r\n";
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#else
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const char* const endl = "\n";
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#endif
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}
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template<typename T>
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class INIMap
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{
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private:
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using T_DataIndexMap = std::unordered_map<std::string, std::size_t>;
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using T_DataItem = std::pair<std::string, T>;
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using T_DataContainer = std::vector<T_DataItem>;
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using T_MultiArgs = typename std::vector<std::pair<std::string, T>>;
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T_DataIndexMap dataIndexMap;
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T_DataContainer data;
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inline std::size_t setEmpty(std::string& key)
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{
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std::size_t index = data.size();
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dataIndexMap[key] = index;
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data.emplace_back(key, T());
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return index;
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}
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public:
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using const_iterator = typename T_DataContainer::const_iterator;
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INIMap() { }
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INIMap(INIMap const& other)
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{
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std::size_t data_size = other.data.size();
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for (std::size_t i = 0; i < data_size; ++i)
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{
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auto const& key = other.data[i].first;
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auto const& obj = other.data[i].second;
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data.emplace_back(key, obj);
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}
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dataIndexMap = T_DataIndexMap(other.dataIndexMap);
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}
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T& operator[](std::string key)
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{
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INIStringUtil::trim(key);
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#ifndef MINI_CASE_SENSITIVE
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INIStringUtil::toLower(key);
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#endif
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auto it = dataIndexMap.find(key);
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bool hasIt = (it != dataIndexMap.end());
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std::size_t index = (hasIt) ? it->second : setEmpty(key);
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return data[index].second;
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}
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T get(std::string key) const
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{
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INIStringUtil::trim(key);
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#ifndef MINI_CASE_SENSITIVE
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INIStringUtil::toLower(key);
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#endif
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auto it = dataIndexMap.find(key);
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if (it == dataIndexMap.end())
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{
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return T();
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}
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return T(data[it->second].second);
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}
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bool has(std::string key) const
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{
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INIStringUtil::trim(key);
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#ifndef MINI_CASE_SENSITIVE
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INIStringUtil::toLower(key);
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#endif
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return (dataIndexMap.count(key) == 1);
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}
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void set(std::string key, T obj)
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{
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INIStringUtil::trim(key);
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#ifndef MINI_CASE_SENSITIVE
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INIStringUtil::toLower(key);
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#endif
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auto it = dataIndexMap.find(key);
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if (it != dataIndexMap.end())
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{
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data[it->second].second = obj;
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}
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else
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{
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dataIndexMap[key] = data.size();
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data.emplace_back(key, obj);
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}
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}
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void set(T_MultiArgs const& multiArgs)
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{
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for (auto const& it : multiArgs)
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{
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auto const& key = it.first;
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auto const& obj = it.second;
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set(key, obj);
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}
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}
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bool remove(std::string key)
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{
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INIStringUtil::trim(key);
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#ifndef MINI_CASE_SENSITIVE
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INIStringUtil::toLower(key);
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#endif
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auto it = dataIndexMap.find(key);
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if (it != dataIndexMap.end())
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{
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std::size_t index = it->second;
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data.erase(data.begin() + index);
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dataIndexMap.erase(it);
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for (auto& it2 : dataIndexMap)
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{
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auto& vi = it2.second;
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if (vi > index)
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{
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vi--;
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}
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}
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return true;
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}
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return false;
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}
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void clear()
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{
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data.clear();
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dataIndexMap.clear();
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}
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std::size_t size() const
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{
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return data.size();
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}
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const_iterator begin() const { return data.begin(); }
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const_iterator end() const { return data.end(); }
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};
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using INIStructure = INIMap<INIMap<std::string>>;
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namespace INIParser
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{
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using T_ParseValues = std::pair<std::string, std::string>;
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enum class PDataType : char
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{
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PDATA_NONE,
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PDATA_COMMENT,
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PDATA_SECTION,
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PDATA_KEYVALUE,
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PDATA_UNKNOWN
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};
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inline PDataType parseLine(std::string line, T_ParseValues& parseData)
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{
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parseData.first.clear();
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parseData.second.clear();
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INIStringUtil::trim(line);
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if (line.empty())
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{
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return PDataType::PDATA_NONE;
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}
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char firstCharacter = line[0];
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if (firstCharacter == ';')
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{
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return PDataType::PDATA_COMMENT;
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}
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if (firstCharacter == '[')
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{
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auto commentAt = line.find_first_of(';');
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if (commentAt != std::string::npos)
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{
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line = line.substr(0, commentAt);
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}
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auto closingBracketAt = line.find_last_of(']');
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if (closingBracketAt != std::string::npos)
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{
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auto section = line.substr(1, closingBracketAt - 1);
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INIStringUtil::trim(section);
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parseData.first = section;
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return PDataType::PDATA_SECTION;
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}
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}
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auto lineNorm = line;
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INIStringUtil::replace(lineNorm, "\\=", " ");
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auto equalsAt = lineNorm.find_first_of('=');
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if (equalsAt != std::string::npos)
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{
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auto key = line.substr(0, equalsAt);
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INIStringUtil::trim(key);
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INIStringUtil::replace(key, "\\=", "=");
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auto value = line.substr(equalsAt + 1);
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INIStringUtil::trim(value);
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parseData.first = key;
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parseData.second = value;
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return PDataType::PDATA_KEYVALUE;
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}
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return PDataType::PDATA_UNKNOWN;
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}
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}
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class INIReader
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{
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public:
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using T_LineData = std::vector<std::string>;
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using T_LineDataPtr = std::shared_ptr<T_LineData>;
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bool isBOM = false;
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private:
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std::ifstream fileReadStream;
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T_LineDataPtr lineData;
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T_LineData readFile()
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{
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fileReadStream.seekg(0, std::ios::end);
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const std::size_t fileSize = static_cast<std::size_t>(fileReadStream.tellg());
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fileReadStream.seekg(0, std::ios::beg);
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if (fileSize >= 3) {
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const char header[3] = {
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static_cast<char>(fileReadStream.get()),
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static_cast<char>(fileReadStream.get()),
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static_cast<char>(fileReadStream.get())
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};
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isBOM = (
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header[0] == static_cast<char>(0xEF) &&
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header[1] == static_cast<char>(0xBB) &&
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header[2] == static_cast<char>(0xBF)
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);
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}
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else {
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isBOM = false;
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}
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std::string fileContents;
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fileContents.resize(fileSize);
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fileReadStream.seekg(isBOM ? 3 : 0, std::ios::beg);
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fileReadStream.read(&fileContents[0], fileSize);
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fileReadStream.close();
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T_LineData output;
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if (fileSize == 0)
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{
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return output;
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}
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std::string buffer;
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buffer.reserve(50);
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for (std::size_t i = 0; i < fileSize; ++i)
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{
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char& c = fileContents[i];
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if (c == '\n')
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{
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output.emplace_back(buffer);
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buffer.clear();
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continue;
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}
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if (c != '\0' && c != '\r')
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{
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buffer += c;
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}
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}
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output.emplace_back(buffer);
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return output;
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}
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public:
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INIReader(std::string const& filename, bool keepLineData = false)
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{
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fileReadStream.open(filename, std::ios::in | std::ios::binary);
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if (keepLineData)
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{
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lineData = std::make_shared<T_LineData>();
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}
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}
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~INIReader() { }
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bool operator>>(INIStructure& data)
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{
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if (!fileReadStream.is_open())
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{
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return false;
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}
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T_LineData fileLines = readFile();
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std::string section;
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bool inSection = false;
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INIParser::T_ParseValues parseData;
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for (auto const& line : fileLines)
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{
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auto parseResult = INIParser::parseLine(line, parseData);
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if (parseResult == INIParser::PDataType::PDATA_SECTION)
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{
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inSection = true;
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data[section = parseData.first];
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}
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else if (inSection && parseResult == INIParser::PDataType::PDATA_KEYVALUE)
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{
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auto const& key = parseData.first;
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auto const& value = parseData.second;
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data[section][key] = value;
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}
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if (lineData && parseResult != INIParser::PDataType::PDATA_UNKNOWN)
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{
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if (parseResult == INIParser::PDataType::PDATA_KEYVALUE && !inSection)
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{
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continue;
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}
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lineData->emplace_back(line);
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}
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}
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return true;
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}
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T_LineDataPtr getLines()
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{
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return lineData;
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}
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};
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class INIGenerator
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{
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private:
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std::ofstream fileWriteStream;
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public:
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bool prettyPrint = false;
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INIGenerator(std::string const& filename)
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{
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fileWriteStream.open(filename, std::ios::out | std::ios::binary);
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}
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~INIGenerator() { }
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bool operator<<(INIStructure const& data)
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{
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if (!fileWriteStream.is_open())
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{
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return false;
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}
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if (!data.size())
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{
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return true;
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}
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auto it = data.begin();
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for (;;)
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{
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auto const& section = it->first;
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auto const& collection = it->second;
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fileWriteStream
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<< "["
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<< section
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<< "]";
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if (collection.size())
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{
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fileWriteStream << INIStringUtil::endl;
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auto it2 = collection.begin();
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for (;;)
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{
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auto key = it2->first;
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INIStringUtil::replace(key, "=", "\\=");
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auto value = it2->second;
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INIStringUtil::trim(value);
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fileWriteStream
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<< key
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<< ((prettyPrint) ? " = " : "=")
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<< value;
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if (++it2 == collection.end())
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{
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break;
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}
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fileWriteStream << INIStringUtil::endl;
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}
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}
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if (++it == data.end())
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{
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break;
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}
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fileWriteStream << INIStringUtil::endl;
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if (prettyPrint)
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{
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fileWriteStream << INIStringUtil::endl;
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}
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}
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return true;
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}
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};
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|
|
class INIWriter
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|
{
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private:
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|
using T_LineData = std::vector<std::string>;
|
|
using T_LineDataPtr = std::shared_ptr<T_LineData>;
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|
|
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std::string filename;
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|
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T_LineData getLazyOutput(T_LineDataPtr const& lineData, INIStructure& data, INIStructure& original)
|
|
{
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T_LineData output;
|
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INIParser::T_ParseValues parseData;
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std::string sectionCurrent;
|
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bool parsingSection = false;
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bool continueToNextSection = false;
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|
bool discardNextEmpty = false;
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bool writeNewKeys = false;
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std::size_t lastKeyLine = 0;
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for (auto line = lineData->begin(); line != lineData->end(); ++line)
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{
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if (!writeNewKeys)
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{
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auto parseResult = INIParser::parseLine(*line, parseData);
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if (parseResult == INIParser::PDataType::PDATA_SECTION)
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|
{
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if (parsingSection)
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|
{
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writeNewKeys = true;
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parsingSection = false;
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--line;
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continue;
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}
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sectionCurrent = parseData.first;
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if (data.has(sectionCurrent))
|
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{
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parsingSection = true;
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continueToNextSection = false;
|
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discardNextEmpty = false;
|
|
output.emplace_back(*line);
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lastKeyLine = output.size();
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|
}
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|
else
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|
{
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continueToNextSection = true;
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discardNextEmpty = true;
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continue;
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}
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|
}
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|
else if (parseResult == INIParser::PDataType::PDATA_KEYVALUE)
|
|
{
|
|
if (continueToNextSection)
|
|
{
|
|
continue;
|
|
}
|
|
if (data.has(sectionCurrent))
|
|
{
|
|
auto& collection = data[sectionCurrent];
|
|
auto const& key = parseData.first;
|
|
auto const& value = parseData.second;
|
|
if (collection.has(key))
|
|
{
|
|
auto outputValue = collection[key];
|
|
if (value == outputValue)
|
|
{
|
|
output.emplace_back(*line);
|
|
}
|
|
else
|
|
{
|
|
INIStringUtil::trim(outputValue);
|
|
auto lineNorm = *line;
|
|
INIStringUtil::replace(lineNorm, "\\=", " ");
|
|
auto equalsAt = lineNorm.find_first_of('=');
|
|
auto valueAt = lineNorm.find_first_not_of(
|
|
INIStringUtil::whitespaceDelimiters,
|
|
equalsAt + 1
|
|
);
|
|
std::string outputLine = line->substr(0, valueAt);
|
|
if (prettyPrint && equalsAt + 1 == valueAt)
|
|
{
|
|
outputLine += " ";
|
|
}
|
|
outputLine += outputValue;
|
|
output.emplace_back(outputLine);
|
|
}
|
|
lastKeyLine = output.size();
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (discardNextEmpty && line->empty())
|
|
{
|
|
discardNextEmpty = false;
|
|
}
|
|
else if (parseResult != INIParser::PDataType::PDATA_UNKNOWN)
|
|
{
|
|
output.emplace_back(*line);
|
|
}
|
|
}
|
|
}
|
|
if (writeNewKeys || std::next(line) == lineData->end())
|
|
{
|
|
T_LineData linesToAdd;
|
|
if (data.has(sectionCurrent) && original.has(sectionCurrent))
|
|
{
|
|
auto const& collection = data[sectionCurrent];
|
|
auto const& collectionOriginal = original[sectionCurrent];
|
|
for (auto const& it : collection)
|
|
{
|
|
auto key = it.first;
|
|
if (collectionOriginal.has(key))
|
|
{
|
|
continue;
|
|
}
|
|
auto value = it.second;
|
|
INIStringUtil::replace(key, "=", "\\=");
|
|
INIStringUtil::trim(value);
|
|
linesToAdd.emplace_back(
|
|
key + ((prettyPrint) ? " = " : "=") + value
|
|
);
|
|
}
|
|
}
|
|
if (!linesToAdd.empty())
|
|
{
|
|
output.insert(
|
|
output.begin() + lastKeyLine,
|
|
linesToAdd.begin(),
|
|
linesToAdd.end()
|
|
);
|
|
}
|
|
if (writeNewKeys)
|
|
{
|
|
writeNewKeys = false;
|
|
--line;
|
|
}
|
|
}
|
|
}
|
|
for (auto const& it : data)
|
|
{
|
|
auto const& section = it.first;
|
|
if (original.has(section))
|
|
{
|
|
continue;
|
|
}
|
|
if (prettyPrint && output.size() > 0 && !output.back().empty())
|
|
{
|
|
output.emplace_back();
|
|
}
|
|
output.emplace_back("[" + section + "]");
|
|
auto const& collection = it.second;
|
|
for (auto const& it2 : collection)
|
|
{
|
|
auto key = it2.first;
|
|
auto value = it2.second;
|
|
INIStringUtil::replace(key, "=", "\\=");
|
|
INIStringUtil::trim(value);
|
|
output.emplace_back(
|
|
key + ((prettyPrint) ? " = " : "=") + value
|
|
);
|
|
}
|
|
}
|
|
return output;
|
|
}
|
|
|
|
public:
|
|
bool prettyPrint = false;
|
|
|
|
INIWriter(std::string const& filename)
|
|
: filename(filename)
|
|
{
|
|
}
|
|
~INIWriter() { }
|
|
|
|
bool operator<<(INIStructure& data)
|
|
{
|
|
struct stat buf;
|
|
bool fileExists = (stat(filename.c_str(), &buf) == 0);
|
|
if (!fileExists)
|
|
{
|
|
INIGenerator generator(filename);
|
|
generator.prettyPrint = prettyPrint;
|
|
return generator << data;
|
|
}
|
|
INIStructure originalData;
|
|
T_LineDataPtr lineData;
|
|
bool readSuccess = false;
|
|
bool fileIsBOM = false;
|
|
{
|
|
INIReader reader(filename, true);
|
|
if ((readSuccess = reader >> originalData))
|
|
{
|
|
lineData = reader.getLines();
|
|
fileIsBOM = reader.isBOM;
|
|
}
|
|
}
|
|
if (!readSuccess)
|
|
{
|
|
return false;
|
|
}
|
|
T_LineData output = getLazyOutput(lineData, data, originalData);
|
|
std::ofstream fileWriteStream(filename, std::ios::out | std::ios::binary);
|
|
if (fileWriteStream.is_open())
|
|
{
|
|
if (fileIsBOM) {
|
|
const char utf8_BOM[3] = {
|
|
static_cast<char>(0xEF),
|
|
static_cast<char>(0xBB),
|
|
static_cast<char>(0xBF)
|
|
};
|
|
fileWriteStream.write(utf8_BOM, 3);
|
|
}
|
|
if (output.size())
|
|
{
|
|
auto line = output.begin();
|
|
for (;;)
|
|
{
|
|
fileWriteStream << *line;
|
|
if (++line == output.end())
|
|
{
|
|
break;
|
|
}
|
|
fileWriteStream << INIStringUtil::endl;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
};
|
|
|
|
class INIFile
|
|
{
|
|
private:
|
|
std::string filename;
|
|
|
|
public:
|
|
INIFile(std::string const& filename)
|
|
: filename(filename)
|
|
{ }
|
|
|
|
~INIFile() { }
|
|
|
|
bool read(INIStructure& data) const
|
|
{
|
|
if (data.size())
|
|
{
|
|
data.clear();
|
|
}
|
|
if (filename.empty())
|
|
{
|
|
return false;
|
|
}
|
|
INIReader reader(filename);
|
|
return reader >> data;
|
|
}
|
|
bool generate(INIStructure const& data, bool pretty = false) const
|
|
{
|
|
if (filename.empty())
|
|
{
|
|
return false;
|
|
}
|
|
INIGenerator generator(filename);
|
|
generator.prettyPrint = pretty;
|
|
return generator << data;
|
|
}
|
|
bool write(INIStructure& data, bool pretty = false) const
|
|
{
|
|
if (filename.empty())
|
|
{
|
|
return false;
|
|
}
|
|
INIWriter writer(filename);
|
|
writer.prettyPrint = pretty;
|
|
return writer << data;
|
|
}
|
|
};
|
|
}
|
|
|
|
#endif // MINI_INI_H_
|