xs.cpp

一个简单灵活的数据挖掘实验平台

/************************************************************************/
/*		AUTHOR:   Leiming Hong                                          */
/*		INST.:    South China Univ. of Tech.							*/
/*      Date:     2005-10-25                                            */
/*      FUNC:     Attribute used for defining data column type          */   
/************************************************************************/
#pragma warning(disable: 4786) //: disable the warning of the debug length problem

#include "xs.h"
//: for testing 
#include <iostream>
#include <ctime>

using namespace std;

//==========================================================
// FUNC:   split the string by the specified delimit chars
// RETURN: string array vector splited
//==========================================================
vector<string> xs::split(const string& str,char* delimits)
{
	vector<string> tokens;
	vector<string>::size_type pos1, pos2;
	pos1 = str.find_first_not_of(delimits);
	if(pos1 == string::npos) tokens.push_back(str);
	while(pos1 != string::npos)
	{
		pos2 = str.find_first_of(delimits,pos1);
		if(pos2 == string::npos) pos2 = str.length();
		string token = str.substr(pos1,pos2-pos1);
		tokens.push_back(token);
		pos1 = str.find_first_not_of(delimits,pos2);
	}	
	return tokens;
}
//==========================================================
// FUNC:   split the string by the specified delimit chars
// RETURN: string array vector splited
//==========================================================
bool xs::start_with(const string& str,string pre,bool sensitive /* = true */)
{
	int len = pre.length();
	if(len > str.length()) return false;
	string pstr = str.substr(0,len);
	if( !sensitive )
	{
		lower(pstr);
		lower(pre);
	}
	return pstr==pre;
}
void xs::lower(string& str)
{
	int len =str.length();
	for(int i=0;i<len;i++) if(str[i]>='A' && str[i]<='Z') str[i] += 0x20;
}
void xs::upper(string& str)
{
	int len =str.length();
	for(int i=0;i<len;i++) if(str[i]>='a' && str[i]<='z') str[i] -= 0x20;
}
string xs::trim(const string& str,string omit /* = " " */)
{
	string::size_type first,last;
	first = str.find_first_not_of(omit);
	last  = str.find_last_not_of(omit);
	if(first == string::npos || last == string::npos) return "";

	return str.substr(first,last-first+1);
}
/************************************************************************
//                    TESTING CODE by L.M.Hong SCUT

void main()
{
	time_t start,end;
	clock_t s,e;
	s = clock();
	time(&start);
	
	int i=0;
	int max = 1000000;
	char* test = " test test test";
	while(i++<max)
	{
		 xs::split(test," ");
	}
	e = clock();
	time(&end);
	cout<<start<<"  "<<end<<endl;
	cout<<s<<"  "<<e<<endl;
	cout<<(end-start)/1000.0<<endl;
	cout<<(e-s)/1000.0<<endl;
}
/************************************************************************/