src/utils/StringTokenizer.cpp

 /*
 * Copyright (c) 2005 The University of Notre Dame. All Rights Reserved.
 *
 * The University of Notre Dame grants you ("Licensee") a
 * non-exclusive, royalty free, license to use, modify and
 * redistribute this software in source and binary code form, provided
 * that the following conditions are met:
 *
 * 1. Acknowledgement of the program authors must be made in any
 *    publication of scientific results based in part on use of the
 *    program.  An acceptable form of acknowledgement is citation of
 *    the article in which the program was described (Matthew
 *    A. Meineke, Charles F. Vardeman II, Teng Lin, Christopher
 *    J. Fennell and J. Daniel Gezelter, "OOPSE: An Object-Oriented
 *    Parallel Simulation Engine for Molecular Dynamics,"
 *    J. Comput. Chem. 26, pp. 252-271 (2005))
 *
 * 2. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 3. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the
 *    distribution.
 *
 * This software is provided "AS IS," without a warranty of any
 * kind. All express or implied conditions, representations and
 * warranties, including any implied warranty of merchantability,
 * fitness for a particular purpose or non-infringement, are hereby
 * excluded.  The University of Notre Dame and its licensors shall not
 * be liable for any damages suffered by licensee as a result of
 * using, modifying or distributing the software or its
 * derivatives. In no event will the University of Notre Dame or its
 * licensors be liable for any lost revenue, profit or data, or for
 * direct, indirect, special, consequential, incidental or punitive
 * damages, however caused and regardless of the theory of liability,
 * arising out of the use of or inability to use software, even if the
 * University of Notre Dame has been advised of the possibility of
 * such damages.
 */
 
#include <iostream>
#include <iterator>
#include <sstream>
#include "utils/StringTokenizer.hpp"

namespace oopse {


StringTokenizer::StringTokenizer(const std::string & str, const std::string & delim) 
                        : tokenString_(str), delim_(delim), returnTokens_(false),
                          currentPos_(tokenString_.begin()), end_(tokenString_.end()){

}

StringTokenizer::StringTokenizer(std::string::const_iterator& first, std::string::const_iterator& last,
                                                               const std::string & delim)  
                        : tokenString_(first, last) , delim_(delim), returnTokens_(false),
                           currentPos_(tokenString_.begin()), end_(tokenString_.end()) {

}

StringTokenizer::StringTokenizer(const std::string&str, const std::string&delim,
                                                                bool returnTokens)
                        : tokenString_(str), delim_(delim), returnTokens_(returnTokens),
                          currentPos_(tokenString_.begin()), end_(tokenString_.end()) {

}

bool StringTokenizer::isDelimiter(const char c) {
    return delim_.find(c) == std::string::npos ? false : true;
}

int StringTokenizer::countTokens() {
    
    std::string::const_iterator tmpIter = currentPos_;    
    int numToken = 0;

    while (true) {

        //skip delimiter first
        while( tmpIter != end_ && isDelimiter(*tmpIter)) {
            ++tmpIter;

            if (returnTokens_) {
                //if delimiter is consider as token
                ++numToken;
            }
        }
        
        if (tmpIter == end_) {
            break;
        }
        
        //encount a token here
        while ( tmpIter != end_ && !isDelimiter(*tmpIter) ) {
            ++tmpIter;
        }

        ++numToken;

    }

    return numToken;
}

bool StringTokenizer::hasMoreTokens() {
    
    if (currentPos_ == end_) {
        return false;
    } else if (returnTokens_) {
        return true;
    } else {
        std::string::const_iterator i = currentPos_;

        //walk through the remaining string to check whether it contains non-delimeter or not
        while(i != end_ && isDelimiter(*i)) {
            ++i;
        }

         return i != end_ ? true : false;
    }
}

std::string StringTokenizer::nextToken() {
    std::string result;
    
    if(currentPos_ != end_) {
        std::insert_iterator<std::string> insertIter(result, result.begin());

        while( currentPos_ != end_ && isDelimiter(*currentPos_)) {

            if (returnTokens_) {
                *insertIter++ = *currentPos_++;
                return result;
            }
            
            ++currentPos_;
        }

        while (currentPos_ != end_ && !isDelimiter(*currentPos_)) {
            *insertIter++ = *currentPos_++;
        }
        
    }
    
    return result;
}

bool StringTokenizer::nextTokenAsBool() {
    std::string token = nextToken();
    std::istringstream iss(token);
    bool result;
    
    if (iss >> result) {
        return result;
    } else {
        std::cerr << "unable to convert " << token << " to a bool" << std::endl;
        return false;
    }
}

int StringTokenizer::nextTokenAsInt() {
    std::string token = nextToken();
    std::istringstream iss(token);
    int result;
    
    if (iss >> result) {
        return result;
    } else {
        std::cerr << "unable to convert " << token << " to an integer" << std::endl;
        return 0;
    }
}

float StringTokenizer::nextTokenAsFloat() {
    std::string token = nextToken();
    std::istringstream iss(token);
    float result;
    
    if (iss >> result) {
        return result;
    } else {
        std::cerr << "unable to convert " << token << " to a float" << std::endl;
        return 0.0;
    }
}

double StringTokenizer::nextTokenAsDouble() {
    std::string token = nextToken();
    std::istringstream iss(token);
    double result;
    
    if (iss >> result) {
        return result;
    } else {
        std::cerr << "unable to convert " << token << " to a double" << std::endl;
        return 0.0;
    }
}

std::string  StringTokenizer::peekNextToken() {
    std::string result;
    std::string::const_iterator tmpIter = currentPos_;
    
    if(tmpIter != end_) {
        std::insert_iterator<std::string> insertIter(result, result.begin());

        while(tmpIter != end_ && isDelimiter(*tmpIter)) {

            if (returnTokens_) {
                *insertIter++ = *tmpIter++;
                return result;
            }
            
            ++tmpIter;
        }

        while (tmpIter != end_ && !isDelimiter(*tmpIter)) {
            *insertIter++ = *tmpIter++;
        }
    }
    
    return result;    
}

}//end namespace oopse

Revision:	1930
Committed:	Wed Jan 12 22:41:40 2005 UTC (19 years, 5 months ago) by gezelter
File size:	6850 byte(s)
Log Message:	merging new_design branch into OOPSE-2.0
#	User	Rev	Content
1	gezelter	1930	/*
2			* Copyright (c) 2005 The University of Notre Dame. All Rights Reserved.
3			*
4			* The University of Notre Dame grants you ("Licensee") a
5			* non-exclusive, royalty free, license to use, modify and
6			* redistribute this software in source and binary code form, provided
7			* that the following conditions are met:
8			*
9			* 1. Acknowledgement of the program authors must be made in any
10			* publication of scientific results based in part on use of the
11			* program. An acceptable form of acknowledgement is citation of
12			* the article in which the program was described (Matthew
13			* A. Meineke, Charles F. Vardeman II, Teng Lin, Christopher
14			* J. Fennell and J. Daniel Gezelter, "OOPSE: An Object-Oriented
15			* Parallel Simulation Engine for Molecular Dynamics,"
16			* J. Comput. Chem. 26, pp. 252-271 (2005))
17			*
18			* 2. Redistributions of source code must retain the above copyright
19			* notice, this list of conditions and the following disclaimer.
20			*
21			* 3. Redistributions in binary form must reproduce the above copyright
22			* notice, this list of conditions and the following disclaimer in the
23			* documentation and/or other materials provided with the
24			* distribution.
25			*
26			* This software is provided "AS IS," without a warranty of any
27			* kind. All express or implied conditions, representations and
28			* warranties, including any implied warranty of merchantability,
29			* fitness for a particular purpose or non-infringement, are hereby
30			* excluded. The University of Notre Dame and its licensors shall not
31			* be liable for any damages suffered by licensee as a result of
32			* using, modifying or distributing the software or its
33			* derivatives. In no event will the University of Notre Dame or its
34			* licensors be liable for any lost revenue, profit or data, or for
35			* direct, indirect, special, consequential, incidental or punitive
36			* damages, however caused and regardless of the theory of liability,
37			* arising out of the use of or inability to use software, even if the
38			* University of Notre Dame has been advised of the possibility of
39			* such damages.
40			*/
41
42			#include <iostream>
43			#include <iterator>
44			#include <sstream>
45			#include "utils/StringTokenizer.hpp"
46
47			namespace oopse {
48
49
50			StringTokenizer::StringTokenizer(const std::string & str, const std::string & delim)
51			: tokenString_(str), delim_(delim), returnTokens_(false),
52			currentPos_(tokenString_.begin()), end_(tokenString_.end()){
53
54			}
55
56			StringTokenizer::StringTokenizer(std::string::const_iterator& first, std::string::const_iterator& last,
57			const std::string & delim)
58			: tokenString_(first, last) , delim_(delim), returnTokens_(false),
59			currentPos_(tokenString_.begin()), end_(tokenString_.end()) {
60
61			}
62
63			StringTokenizer::StringTokenizer(const std::string&str, const std::string&delim,
64			bool returnTokens)
65			: tokenString_(str), delim_(delim), returnTokens_(returnTokens),
66			currentPos_(tokenString_.begin()), end_(tokenString_.end()) {
67
68			}
69
70			bool StringTokenizer::isDelimiter(const char c) {
71			return delim_.find(c) == std::string::npos ? false : true;
72			}
73
74			int StringTokenizer::countTokens() {
75
76			std::string::const_iterator tmpIter = currentPos_;
77			int numToken = 0;
78
79			while (true) {
80
81			//skip delimiter first
82			while( tmpIter != end_ && isDelimiter(*tmpIter)) {
83			++tmpIter;
84
85			if (returnTokens_) {
86			//if delimiter is consider as token
87			++numToken;
88			}
89			}
90
91			if (tmpIter == end_) {
92			break;
93			}
94
95			//encount a token here
96			while ( tmpIter != end_ && !isDelimiter(*tmpIter) ) {
97			++tmpIter;
98			}
99
100			++numToken;
101
102			}
103
104			return numToken;
105			}
106
107			bool StringTokenizer::hasMoreTokens() {
108
109			if (currentPos_ == end_) {
110			return false;
111			} else if (returnTokens_) {
112			return true;
113			} else {
114			std::string::const_iterator i = currentPos_;
115
116			//walk through the remaining string to check whether it contains non-delimeter or not
117			while(i != end_ && isDelimiter(*i)) {
118			++i;
119			}
120
121			return i != end_ ? true : false;
122			}
123			}
124
125			std::string StringTokenizer::nextToken() {
126			std::string result;
127
128			if(currentPos_ != end_) {
129			std::insert_iterator<std::string> insertIter(result, result.begin());
130
131			while( currentPos_ != end_ && isDelimiter(*currentPos_)) {
132
133			if (returnTokens_) {
134			insertIter++ = currentPos_++;
135			return result;
136			}
137
138			++currentPos_;
139			}
140
141			while (currentPos_ != end_ && !isDelimiter(*currentPos_)) {
142			insertIter++ = currentPos_++;
143			}
144
145			}
146
147			return result;
148			}
149
150			bool StringTokenizer::nextTokenAsBool() {
151			std::string token = nextToken();
152			std::istringstream iss(token);
153			bool result;
154
155			if (iss >> result) {
156			return result;
157			} else {
158			std::cerr << "unable to convert " << token << " to a bool" << std::endl;
159			return false;
160			}
161			}
162
163			int StringTokenizer::nextTokenAsInt() {
164			std::string token = nextToken();
165			std::istringstream iss(token);
166			int result;
167
168			if (iss >> result) {
169			return result;
170			} else {
171			std::cerr << "unable to convert " << token << " to an integer" << std::endl;
172			return 0;
173			}
174			}
175
176			float StringTokenizer::nextTokenAsFloat() {
177			std::string token = nextToken();
178			std::istringstream iss(token);
179			float result;
180
181			if (iss >> result) {
182			return result;
183			} else {
184			std::cerr << "unable to convert " << token << " to a float" << std::endl;
185			return 0.0;
186			}
187			}
188
189			double StringTokenizer::nextTokenAsDouble() {
190			std::string token = nextToken();
191			std::istringstream iss(token);
192			double result;
193
194			if (iss >> result) {
195			return result;
196			} else {
197			std::cerr << "unable to convert " << token << " to a double" << std::endl;
198			return 0.0;
199			}
200			}
201
202			std::string StringTokenizer::peekNextToken() {
203			std::string result;
204			std::string::const_iterator tmpIter = currentPos_;
205
206			if(tmpIter != end_) {
207			std::insert_iterator<std::string> insertIter(result, result.begin());
208
209			while(tmpIter != end_ && isDelimiter(*tmpIter)) {
210
211			if (returnTokens_) {
212			insertIter++ = tmpIter++;
213			return result;
214			}
215
216			++tmpIter;
217			}
218
219			while (tmpIter != end_ && !isDelimiter(*tmpIter)) {
220			insertIter++ = tmpIter++;
221			}
222			}
223
224			return result;
225			}
226
227			}//end namespace oopse
228