stringtokenizer.cpp

J-Alice是一个用C++实现的Ailcebot的克隆。它可以做为一个mini-http服务器在控制台或irc聊天。目前

/**
 * StringTokenizer - Tokenizes Strings
 *
 * Modified from Java StringTokenizer
 */
#include "StringTokenizer.h"

bool StringTokenizer::hasMoreTokens() {
	skipDelimiters();
	return (currentPosition < maxPosition);
}

string StringTokenizer::nextToken() {
	skipDelimiters();
	
	if (currentPosition >= maxPosition) {
		return "";
	}
	
	int start = currentPosition;
	while ((currentPosition < maxPosition) &&
			(delim.find(str[currentPosition]) == string::npos)) {
		currentPosition++;
	}
	if (retTok && (start == currentPosition) &&
			(delim.find(str[currentPosition]) != string::npos)) {
		currentPosition++;
	}
	return str.substr(start, currentPosition - start);
}

string StringTokenizer::nextToken(const string &d) {
	delim = d;
	return nextToken();
}

int StringTokenizer::countTokens() {
	int count = 0;
	int currpos = currentPosition;
	
	while (currpos < maxPosition) {
		while (!retTok &&
				(currpos < maxPosition) &&
				(delim.find(str[currpos]) != string::npos)) {
			currpos++;
		}
		if (currpos >= maxPosition) {
			break;
		}
		int start = currpos;
		while ((currpos < maxPosition) &&
				(delim.find(str[currpos]) == string::npos)) {
			currpos++;
		}
		if (retTok && (start == currpos) &&
				(delim.find(str[currpos]) != string::npos)) {
			currpos++;
		}
		count++;
	}
	return count;
}

void StringTokenizer::skipDelimiters() {
	while (!retTok &&
			(currentPosition < maxPosition) &&
			(delim.find(str[currentPosition]) != string::npos)) {
		currentPosition++;
	}
}