StringTokenizer.h

#ifndef STRING_TOKENIZER_H
#define STRING_TOKENIZER_H
#include <string>

/** The string_tokenizer class splits a string into a sequence of subtrings,
called tokens, separated by delimeters.
*/
class String_Tokenizer
{
public:
	/** Construct a String_Tokenizer
	@param source The string to be split into tokens
	@param delim The string containing the delimeters. If
	this parameter is omitted, a space character is assumed.
	*/
	String_Tokenizer(std::string source, std::string delim = " ") :
		the_source(source), the_delim(delim), start(0), end(0) {
		find_next();
	}

	/** Determine if there are more tokens
	@return true if there are more tokens
	*/
	bool has_more_tokens();

	/** Retrieve the next token
	@return The next token. If there are no more tokens, an empty
	string is returned.
	*/
	std::string next_token();

private:
	/** Position start and end so that start is the index of the start
	of the next token and end is the end.
	*/
	void find_next();
	/** The string to be split into tokens */
	std::string the_source;
	/** The string of delimeters */
	std::string the_delim;
	/** The index of the start of the next token */
	size_t start;
	/** The index of the end of the next token*/
	size_t end;
};

#endif