stl读取ini配置文件例子

#ifndef _INIFILE_H__
#define _INIFILE_H__
#include <map>
#include <string>
#include <vector>
#include <algorithm>
#include <functional>
#include <fstream>
using namespace std;
typedef map<string, string, less<string> > strMap;
typedef strMap::iterator strMapIt;
const char*const MIDDLESTRING = "_____***_______";
struct analyzeini{
string strsect;
strMap *pmap;
analyzeini(strMap & strmap):pmap(&strmap){}
void operator()( const string & strini)
{
int first =strini.find('[');
int last = strini.rfind(']');
if( first != string::npos && last != string::npos && first != last+1)
{
strsect = strini.substr(first+1,last-first-1);
return ;
}
if(strsect.empty())
return ;
if((first=strini.find('='))== string::npos)
return ;
string strtmp1= strini.substr(0,first);
string strtmp2=strini.substr(first+1, string::npos);
first= strtmp1.find_first_not_of(" /t");
last = strtmp1.find_last_not_of(" /t");
if(first == string::npos || last == string::npos)
return ;
string strkey = strtmp1.substr(first, last-first+1);
first = strtmp2.find_first_not_of(" /t");
if(((last = strtmp2.find("/t#", first )) != -1) ||
((last = strtmp2.find(" #", first )) != -1) ||
((last = strtmp2.find("/t//", first )) != -1)||
((last = strtmp2.find(" //", first )) != -1))
{
strtmp2 = strtmp2.substr(0, last-first);
}
last = strtmp2.find_last_not_of(" /t");
if(first == string::npos || last == string::npos)
return ;
string value = strtmp2.substr(first, last-first+1);
string mapkey = strsect + MIDDLESTRING;
mapkey += strkey;
(*pmap)[mapkey]=value;
return ;
}
};
class IniFile
{
public:
IniFile( ){};
~IniFile( ){};
bool open(const char* pinipath)
{
return do_open(pinipath);
}
string read(const char*psect, const char*pkey)
{
string mapkey = psect;
mapkey += MIDDLESTRING;
mapkey += pkey;
strMapIt it = c_inimap.find(mapkey);
if(it == c_inimap.end())
return "";
else
return it->second;
}
protected:
bool do_open(const char* pinipath)
{
ifstream fin(pinipath);
if(!fin.is_open())
return false;
vector<string> strvect;
while(!fin.eof())
{
string inbuf;
getline(fin, inbuf,'/n');
strvect.push_back(inbuf);
}
if(strvect.empty())
return false;
for_each(strvect.begin(), strvect.end(), analyzeini(c_inimap));
return !c_inimap.empty();
}
strMap c_inimap;
};
#endif
---------------------------------------------------------------------------------------------------
#include <iostream>
#include "inifile.h"
using namespace std;
int main()
{
IniFile ini;
if(!ini.open("test.ini"))
return -1;
string strvalue = ini.read("sect1","key1");
if(strvalue.empty())
return -1;
else
cout<<"value="<<strvalue<<endl;
return 0;
}
test.ini:
[sect1]
key1=xywc
--------------------------------------------------------------------------------------------
RM= rm -f
CXX= g++
FLAGS= -Wno-ctor-dtor-privacy -Wno-deprecated #-fPIC
AR=ar rc
CFLAGS=-L.
LIBCFLAGS= -D_REENTRANT #-fPIC
OBJS= $(SOURCES:.cxx=.o)
.SUFFIXES: .pc .cxx .cpp
.cxx.o:
$(RM) $@
$(CXX) -c -O $(FLAGS) $(LIBCFLAGS) -o $@ $<
.cpp.o:
$(RM) $@
$(CXX) -c -g -O $(FLAGS) $(LIBCFLAGS) -o $@ $<
OBJS=main.o
all:
test

test: $(OBJS)
$(RM) $@
$(CXX) -o $@ $(OBJS)
clean:
rm -f test
rm -f *.o