boost::property_tree读取解析ini文件--推荐
boost::property_tree读取解析ini文件
#include "stdafx.h" #include <iostream> #include <boost/property_tree/ptree.hpp> #include <boost/property_tree/ini_parser.hpp> int main() { boost::property_tree::ptree pt; boost::property_tree::ini_parser::read_ini("D:\\Overlay.ini", pt); std::cout << pt.get<std::string>("OVERLAY.OverlayFontName") << std::endl; pt.put<std::string>("OVERLAY.OverlayFontName","宋体"); std::cout << pt.get<std::string>("OVERLAY.OverlayFontName") << std::endl; boost::property_tree::ini_parser::write_ini("D:\\Overlay.ini",pt); return 0; }
在C++11下，宽字节和单字节转换就简单了。使用std::wstring_convert和std::codecvt_utf8 来处理UTF8与WChar之间的互转.
#include <iostream> #include <string> #include <locale> #include <codecvt> #include <fstream> int main(int argc, char *argv[]) { std::wstring str = L"123,宋体！"; std::wstring_convert<std::codecvt_utf8<wchar_t>> conv; std::string narrowStr = conv.to_bytes(str); { std::ofstream ofs ("c:\\test.txt"); ofs << narrowStr; } std::wstring wideStr = conv.from_bytes(narrowStr); { std::locale::global(std::locale("Chinese-simplified")); std::wofstream ofs (L"c:\\testW.txt"); ofs << wideStr; } ｝
另外可以保存函数，使用ptree：
struct debug_simple { int itsNumber; std::string itsName; //这里使用string就可以 void load(const std::string& filename); //载入函数 void save(const std::string& filename); //保存函数 };
保存函数，使用ptree：
void debug_simple::save( const std::string& filename )
{
using boost::property_tree::ptree;
ptree pt;
pt.put("debug.number",itsNumber);
pt.put("debug.name",itsName);
write_xml(filename,pt);
}
载入函数使用的wptree，读取的值为wstring，需转换成string
void debug_simple::load( const std::string& filename )
{
using boost::property_tree::wptree;
wptree wpt;
read_xml(filename, wpt);
itsNumber = wpt.get<int>(L"debug.number");
std::wstring wStr = wpt.get<std::wstring>(L"debug.name");
itsName = std::string(wStr.begin(),wStr.end()); //wstring转string
}
main函数：
int _tmain(int argc, _TCHAR* argv[])
{
try
{
debug_simple ds,read;
ds.itsName = "汉字english";
ds.itsNumber = 20;
ds.save("simple.xml");
read.load("simple.xml");
std::cout<<read.itsNumber<<read.itsName;
}
catch (std::exception &e)
{
std::cout << "Error: " << e.what() << "\n";
}
return 0;
}
由于.ini文件是utf-8格式的，所以操作时要utf-8到unicode转换，或unicode到utf-8转换；
// PropertyTree.cpp : 定义控制台应用程序的入口点。 // #include "stdafx.h" #include <iostream> using namespace std; #include <boost/property_tree/ptree.hpp> #include <boost/property_tree/ini_parser.hpp> //unicode 转UTF8 //参数1是UTF8字符串当前位置指针，这里必须要是指针，因为必须要通过第1个字符进行判断才知道一个完整的字符的编码要向后取多少个字符 //参数2是返回的UCS-2编码的Unicode字符 inline int UTF82UnicodeOne(const char* utf8, wchar_t& wch) { if (utf8==NULL) { return -1; } //首字符的Ascii码大于0xC0才需要向后判断，否则，就肯定是单个ANSI字符了 unsigned char firstCh = utf8[0]; if (firstCh >= 0xC0) { //根据首字符的高位判断这是几个字母的UTF8编码 int afters, code; if ((firstCh & 0xE0) == 0xC0) { afters = 2; code = firstCh & 0x1F; } else if ((firstCh & 0xF0) == 0xE0) { afters = 3; code = firstCh & 0xF; } else if ((firstCh & 0xF8) == 0xF0) { afters = 4; code = firstCh & 0x7; } else if ((firstCh & 0xFC) == 0xF8) { afters = 5; code = firstCh & 0x3; } else if ((firstCh & 0xFE) == 0xFC) { afters = 6; code = firstCh & 0x1; } else { wch = firstCh; return 1; } //知道了字节数量之后，还需要向后检查一下，如果检查失败，就简单的认为此UTF8编码有问题，或者不是UTF8编码，于是当成一个ANSI来返回处理 for(int k = 1; k < afters; ++ k) { if ((utf8[k] & 0xC0) != 0x80) { //判断失败，不符合UTF8编码的规则，直接当成一个ANSI字符返回 wch = firstCh; return 1; } code <<= 6; code |= (unsigned char)utf8[k] & 0x3F; } wch = code; return afters; } else { wch = firstCh; } return 1; } //参数1是UTF8编码的字符串 //参数2是输出的UCS-2的Unicode字符串 //参数3是参数1字符串的长度 //使用的时候需要注意参数2所指向的内存块足够用。其实安全的办法是判断一下pUniBuf是否为NULL，如果为NULL则只统计输出长度不写pUniBuf，这样 //通过两次函数调用就可以计算出实际所需要的Unicode缓存输出长度。当然，更简单的思路是：无论如何转换，UTF8的字符数量不可能比Unicode少，所 //以可以简单的按照sizeof(wchar_t) * utf8Leng来分配pUniBuf的内存…… int UTF82Unicode(const char* utf8Buf, wchar_t *pUniBuf, int utf8Leng) { if ((utf8Buf==NULL)||(pUniBuf==NULL)) { return -1; } int i = 0, count = 0; while(i < utf8Leng) { i += UTF82UnicodeOne(utf8Buf + i, pUniBuf[count]); count ++; } return count; } inline int Unicode2UTF8One(unsigned wchar, char *utf8) { if (utf8==NULL) { return -1; } int len = 0; if (wchar < 0xC0) { utf8[len ++] = (char)wchar; } else if (wchar < 0x800) { utf8[len ++] = 0xc0 | (wchar >> 6); utf8[len ++] = 0x80 | (wchar & 0x3f); } else if (wchar < 0x10000) { utf8[len ++] = 0xe0 | (wchar >> 12); utf8[len ++] = 0x80 | ((wchar >> 6) & 0x3f); utf8[len ++] = 0x80 | (wchar & 0x3f); } else if (wchar < 0x200000) { utf8[len ++] = 0xf0 | ((int)wchar >> 18); utf8[len ++] = 0x80 | ((wchar >> 12) & 0x3f); utf8[len ++] = 0x80 | ((wchar >> 6) & 0x3f); utf8[len ++] = 0x80 | (wchar & 0x3f); } else if (wchar < 0x4000000) { utf8[len ++] = 0xf8 | ((int)wchar >> 24); utf8[len ++] = 0x80 | ((wchar >> 18) & 0x3f); utf8[len ++] = 0x80 | ((wchar >> 12) & 0x3f); utf8[len ++] = 0x80 | ((wchar >> 6) & 0x3f); utf8[len ++] = 0x80 | (wchar & 0x3f); } else if (wchar < 0x80000000) { utf8[len ++] = 0xfc | ((int)wchar >> 30); utf8[len ++] = 0x80 | ((wchar >> 24) & 0x3f); utf8[len ++] = 0x80 | ((wchar >> 18) & 0x3f); utf8[len ++] = 0x80 | ((wchar >> 12) & 0x3f); utf8[len ++] = 0x80 | ((wchar >> 6) & 0x3f); utf8[len ++] = 0x80 | (wchar & 0x3f); } return len; } // int Unicode2UTF8( const wchar_t *pUniBuf,char* utf8Buf, int UniLeng) { if ((utf8Buf==NULL)||(pUniBuf==NULL)) { return -1; } int count = 0, i = 0; while(i < UniLeng) { count += Unicode2UTF8One(pUniBuf[i], utf8Buf+count); i ++; } return count; } int main() { boost::property_tree::ptree pt; using boost::property_tree::wptree; wptree wpt; boost::property_tree::ini_parser::read_ini("D:\\Overlay.ini", pt); std::string fontName=pt.get<std::string>("OVERLAY.OverlayFontName") ; wchar_t wfontName[128]={0}; UTF82Unicode(fontName.c_str(),wfontName,fontName.length()); std::wstring wstrfontName=wfontName; //std::wcout << wstrfontName.c_str()<< std::endl; /*std::wstring */ wstrfontName=_T("我是谁"); char cfontName[128]={0}; Unicode2UTF8(wstrfontName.c_str(),cfontName,wstrfontName.length()); pt.put<std::string>("OVERLAY.OverlayFontName",cfontName); //std::cout << pt.get<std::string>("OVERLAY.OverlayFontName") << std::endl; boost::property_tree::ini_parser::write_ini("D:\\Overlay.ini",pt); return 0; }
