src/utils/StringTokenizer.hpp

/*
 * Copyright (C) 2000-2004  Object Oriented Parallel Simulation Engine (OOPSE) project
 * 
 * Contact: oopse@oopse.org
 * 
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public License
 * as published by the Free Software Foundation; either version 2.1
 * of the License, or (at your option) any later version.
 * All we ask is that proper credit is given for our work, which includes
 * - but is not limited to - adding the above copyright notice to the beginning
 * of your source code files, and to any copyright notice that you may distribute
 * with programs based on this work.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 */

/**
 * @file StringTokenizer.hpp
 * @author tlin
 * @date 09/20/2004
 * @time 11:30am
 * @version 1.0
 */

#ifndef UTIL_STRINGTOKENIZER_HPP

#define UTIL_STRINGTOKENIZER_HPP

#include <string>

//#include "util/NoSuchElementException.hpp"

namespace oopse {

/**
 * @class StringTokenizer.hpp "util/StringTokenizer.hpp"
 * @brief The string tokenizer class allows an application to break a string into tokens
 * The set of delimiters (the characters that separate tokens) may be specified either 
 * at creation time or on a per-token basis. 
 * An instance of StringTokenizer behaves in one of two ways, depending on whether it was 
 * created with the returnTokens flag having the value true or false.
 */
class StringTokenizer {
    public:

        static const std::string defaultDelim;
        /**
         * Constructs a string tokenizer for the specified string. The characters in the delim argument
         * are the delimiters for separating tokens. characters are skipped and only serve as 
         * separators between tokens.
         * @param str a string to be parsed.
         * @param delim the delimiters, default value is " \t\n\r".
         * @note this is still a little bit java like implementation. Pure c++ one should use TokenIterator.
         * Boost's tokenizer class is one of them 
         */
        StringTokenizer(const std::string & str,
                        const std::string & delim = defaultDelim);

        /**
         * Constructs a string tokenizer for an iterator range [first, last). The characters in the delim argument
         * are the delimiters for separating tokens. characters are skipped and only serve as 
         * separators between tokens.
         * @param first begin iterator
         * @param last end iterator
         * @param delim the delimiters, default value is " \t\n\r".
         * @note this is still a little bit java like implementation. Pure c++ one should use TokenIterator.
         * Boost's tokenizer class is one of them 
         */
        StringTokenizer(std::string::const_iterator& first, std::string::const_iterator& last,
                        const std::string & delim = defaultDelim);

        /**
         * Constructs a string tokenizer for the specified string. The characters in the delim argument
         * are the delimiters for separating tokens. 
         * If the returnTokens flag is true, then the delimiter characters are also returned as tokens. 
         * Each delimiter is returned as a string of length one. If the flag is false, the delimiter 
         * characters are skipped and only serve as separators between tokens.
         * @param str a string to be parsed. 
         * @param delim the delimiters. 
         * @param returnTokens flag indicating whether to return the delimiters as tokens.
         */
        StringTokenizer(const std::string&str, const std::string&delim,
                        bool returnTokens);

        /**
         * Calculates the number of times that this tokenizer's nextToken method can be called 
         * before it generates an exception.
         * @return the number of tokens remaining in the string using the current delimiter set.
         */
        int countTokens();

        /**
         * Tests if there are more tokens available from this tokenizer's string.
         * @return true if there are more tokens available from this tokenizer's string, false otherwise
         */
        bool hasMoreTokens();

        /**
         * Returns the next token from this string tokenizer.
         * @return the next token from this string tokenizer.
         * @exception NoSuchElementException if there are no more tokens in this tokenizer's string
         */
        std::string nextToken();

        /**
         * Returns the next token from this string tokenizer as an integer.
         * @return the next token from this string tokenizer  as an integer.
         */
        int nextTokenAsInt();

        /**
         * Returns the next token from this string tokenizer as a float.
         * @return the next token from this string tokenizer as a float.
         */
        float nextTokenAsFloat();

        /**
         * Returns the next token without advancing the position of the StringTokenizer.
         * @return the next token
         */
        std::string  peekNextToken();

        /**
         * Returns the current delimiter set of this string tokenizer
         * @return the current delimiter set
         */
        const std::string& getDelimiters() {
            return delim_;
        }

        /** 
         * Returns the original string before tokenizing.
         * @return the original string before tokenizing 
         */
        const std::string& getOriginal() {
            return tokenString_;
        }

    private:

        /**
         * Test if character is in current delimiter set.
         * @param c character to be tested
         * @return true if character is in current delimiter set, flase otherwise.
         */
        bool isDelimiter(char c);

        std::string tokenString_;

        std::string delim_;         /**< current delimiter set of this string tokenizer */

        bool returnTokens_; /**< flag indicating whether to return the delimiters as tokens */

        std::string::const_iterator currentPos_;
        std::string::const_iterator end_;
};

}                               //namespace oopse

#endif                          //UTIL_STRINGTOKENIZER_HPP
Revision:	1739
Committed:	Mon Nov 15 18:02:15 2004 UTC (19 years, 8 months ago) by tim
File size:	6639 byte(s)
Log Message:	finish DumpReader, DumpWriter.Next Step is LJFF and integrators
#	Content
1	/*
2	* Copyright (C) 2000-2004 Object Oriented Parallel Simulation Engine (OOPSE) project
3	*
4	* Contact: oopse@oopse.org
5	*
6	* This program is free software; you can redistribute it and/or
7	* modify it under the terms of the GNU Lesser General Public License
8	* as published by the Free Software Foundation; either version 2.1
9	* of the License, or (at your option) any later version.
10	* All we ask is that proper credit is given for our work, which includes
11	* - but is not limited to - adding the above copyright notice to the beginning
12	* of your source code files, and to any copyright notice that you may distribute
13	* with programs based on this work.
14	*
15	* This program is distributed in the hope that it will be useful,
16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18	* GNU Lesser General Public License for more details.
19	*
20	* You should have received a copy of the GNU Lesser General Public License
21	* along with this program; if not, write to the Free Software
22	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23	*
24	*/
25
26	/**
27	* @file StringTokenizer.hpp
28	* @author tlin
29	* @date 09/20/2004
30	* @time 11:30am
31	* @version 1.0
32	*/
33
34	#ifndef UTIL_STRINGTOKENIZER_HPP
35
36	#define UTIL_STRINGTOKENIZER_HPP
37
38	#include <string>
39
40	//#include "util/NoSuchElementException.hpp"
41
42	namespace oopse {
43
44	/**
45	* @class StringTokenizer.hpp "util/StringTokenizer.hpp"
46	* @brief The string tokenizer class allows an application to break a string into tokens
47	* The set of delimiters (the characters that separate tokens) may be specified either
48	* at creation time or on a per-token basis.
49	* An instance of StringTokenizer behaves in one of two ways, depending on whether it was
50	* created with the returnTokens flag having the value true or false.
51	*/
52	class StringTokenizer {
53	public:
54
55	static const std::string defaultDelim;
56	/**
57	* Constructs a string tokenizer for the specified string. The characters in the delim argument
58	* are the delimiters for separating tokens. characters are skipped and only serve as
59	* separators between tokens.
60	* @param str a string to be parsed.
61	* @param delim the delimiters, default value is " \t\n\r".
62	* @note this is still a little bit java like implementation. Pure c++ one should use TokenIterator.
63	* Boost's tokenizer class is one of them
64	*/
65	StringTokenizer(const std::string & str,
66	const std::string & delim = defaultDelim);
67
68	/**
69	* Constructs a string tokenizer for an iterator range [first, last). The characters in the delim argument
70	* are the delimiters for separating tokens. characters are skipped and only serve as
71	* separators between tokens.
72	* @param first begin iterator
73	* @param last end iterator
74	* @param delim the delimiters, default value is " \t\n\r".
75	* @note this is still a little bit java like implementation. Pure c++ one should use TokenIterator.
76	* Boost's tokenizer class is one of them
77	*/
78	StringTokenizer(std::string::const_iterator& first, std::string::const_iterator& last,
79	const std::string & delim = defaultDelim);
80
81	/**
82	* Constructs a string tokenizer for the specified string. The characters in the delim argument
83	* are the delimiters for separating tokens.
84	* If the returnTokens flag is true, then the delimiter characters are also returned as tokens.
85	* Each delimiter is returned as a string of length one. If the flag is false, the delimiter
86	* characters are skipped and only serve as separators between tokens.
87	* @param str a string to be parsed.
88	* @param delim the delimiters.
89	* @param returnTokens flag indicating whether to return the delimiters as tokens.
90	*/
91	StringTokenizer(const std::string&str, const std::string&delim,
92	bool returnTokens);
93
94	/**
95	* Calculates the number of times that this tokenizer's nextToken method can be called
96	* before it generates an exception.
97	* @return the number of tokens remaining in the string using the current delimiter set.
98	*/
99	int countTokens();
100
101	/**
102	* Tests if there are more tokens available from this tokenizer's string.
103	* @return true if there are more tokens available from this tokenizer's string, false otherwise
104	*/
105	bool hasMoreTokens();
106
107	/**
108	* Returns the next token from this string tokenizer.
109	* @return the next token from this string tokenizer.
110	* @exception NoSuchElementException if there are no more tokens in this tokenizer's string
111	*/
112	std::string nextToken();
113
114	/**
115	* Returns the next token from this string tokenizer as an integer.
116	* @return the next token from this string tokenizer as an integer.
117	*/
118	int nextTokenAsInt();
119
120	/**
121	* Returns the next token from this string tokenizer as a float.
122	* @return the next token from this string tokenizer as a float.
123	*/
124	float nextTokenAsFloat();
125
126	/**
127	* Returns the next token without advancing the position of the StringTokenizer.
128	* @return the next token
129	*/
130	std::string peekNextToken();
131
132	/**
133	* Returns the current delimiter set of this string tokenizer
134	* @return the current delimiter set
135	*/
136	const std::string& getDelimiters() {
137	return delim_;
138	}
139
140	/**
141	* Returns the original string before tokenizing.
142	* @return the original string before tokenizing
143	*/
144	const std::string& getOriginal() {
145	return tokenString_;
146	}
147
148	private:
149
150	/**
151	* Test if character is in current delimiter set.
152	* @param c character to be tested
153	* @return true if character is in current delimiter set, flase otherwise.
154	*/
155	bool isDelimiter(char c);
156
157	std::string tokenString_;
158
159	std::string delim_; /*< current delimiter set of this string tokenizer /
160
161	bool returnTokens_; /*< flag indicating whether to return the delimiters as tokens /
162
163	std::string::const_iterator currentPos_;
164	std::string::const_iterator end_;
165	};
166
167	} //namespace oopse
168
169	#endif //UTIL_STRINGTOKENIZER_HPP