//---------------------------------------------------------------------------

#pragma hdrstop

//---------------------------------------------------------------------------

#pragma argsused

#ifdef MSVC
  #pragma warning (disable : 4530)
  #pragma warning (disable : 4786)
#endif

#include <stdio.h>
#include <vector>
#include <string>
#include <memory>
#include <algorithm>
using namespace std;

class String_Util  
{
public:	
	static string& LowerCase(string& str) {
		transform(str.begin(), str.end(), str.begin(), tolower); //
		return str;
	}
	static string& UpperCase(string& str) {
		transform(str.begin(), str.end(), str.begin(), toupper); //
		return str;
	}
	
	static string& LTrim(string& str) {
		string::size_type pos = str.find_first_not_of(' ');
		if(pos != string::npos) str.erase(0, pos);	
		else str.erase(str.begin(), str.end());
		return str;
	}
	static string& RTrim(string& str) {
		string::size_type pos = str.find_last_not_of(' ');
		if(pos != string::npos) str.erase(pos + 1);
		else str.erase(str.begin(), str.end());
		return str;
	}
	static string& Trim(string& str) {
		string::size_type pos = str.find_last_not_of(' ');
		if(pos != string::npos) {
			str.erase(pos + 1);
			pos = str.find_first_not_of(' ');
			if(pos != string::npos) str.erase(0, pos);
		}
		else str.erase(str.begin(), str.end());
		return str;
	}

	static void StringTokenize(const string& str, vector<string>& tokens, const string& delimiters = " ") {
		string::size_type lastPos = str.find_first_not_of(delimiters, 0);
		string::size_type pos     = str.find_first_of(delimiters, lastPos);
		
		while (string::npos != pos || string::npos != lastPos){
			tokens.push_back(str.substr(lastPos, pos - lastPos));
			lastPos = str.find_first_not_of(delimiters, pos);
			pos = str.find_first_of(delimiters, lastPos);
		}
	}
	// just debug
	static void string_print(string& str) {
		puts(str.c_str());
	}
		
	static void test() {
		string str1 = " hi Mulder , String Demo ÀÔ´Ï´Ù. ....     ";
		string str2 = str1;
		string str3 = str1;
		string str4 = str1;
		string str5 = str1;
		string str6 = str1;

		
		printf("source[%s]\nlower[%s]\nupper[%s]\nleft-trim[%s]\nright-trim[%s]\nboth-trim[%s]\n",
			str1.c_str(),
			String_Util::LowerCase(str1).c_str(),
			String_Util::UpperCase(str2).c_str(),
			String_Util::LTrim(str3).c_str(),
			String_Util::RTrim(str4).c_str(),
			String_Util::Trim(str5).c_str()
			);

		vector<string> tokens;
		StringTokenize(str6, tokens, " ");
		for_each(tokens.begin(), tokens.end(), string_print);

	}
};



int main(int argc, char* argv[])
{
    String_Util::test();
    return 0;
}
//---------------------------------------------------------------------------