src/mdParser/SimplePreprocessor.hpp

/*
 * 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.
 */

#ifndef MDPARSER_SIMPLEPREPROCESSOR_HPP
#define MDPARSER_SIMPLEPREPROCESSOR_HPP
#include <iostream>
#include <set>
#include <fstream>
#include "utils/StringTokenizer.hpp"
#include "utils/Trim.hpp"
/**
 * @class SimplePreprocessor
 * @brief A simple preprocessor.
 * @note only support #include #ifdef, #ifndef, #endif, #define and #undef, c-like multiple line
 *  comment is not support, macro substitude is not support.
 */
namespace oopse { 
class SimplePreprocessor {
    public:
        bool preprocess(const std::string& filename, ostream& os) {
            std::set<std::string> defineSet;
            std::stack<bool> ifStates;

            ifStates.push(true);
            return doPreprocess(filename, os, defineSet, ifStates);
        }
        
    private:
        bool doPreprocess(const std::string& filename, ostream& os, std::set<std::string>& defineSet, std::stack<bool>& ifStates) {
            std::ifstream input(filename.c_str());
            
            int lineNo =1;
            os << "#line " << lineNo << " \"" << filename << "\"\n";
            while(input.getline(buffer, bufferSize)) {
              ++lineNo;
              std::string line = trimLeftCopy(buffer);
              if (!line.empty() && line[0] == '#') {
                    StringTokenizer tokenizer(line.substr(1, line.length()));
                    std::vector<std::string> tokens = tokenizer.getAllTokens();
                    if (tokens.size() < 1 ) {
                        return false;
                    }
                    std::string keyword = tokens[0];
                    if (tokens[0] == "endif") {
                        ifStates.pop();
                        if (ifStates.empty()) {
                            std::cout << "Error in preprocessing: endif \n";
                            return false;
                        }
                        os << std::endl;                        
                    } else if (tokens.size() == 2) {
                        if (tokens[0] == "include") {
                            SimplePreprocessor subPreprocessor;
                            std::string includeFilename = tokens[1];
                            includeFilename = includeFilename.substr(1, includeFilename.length() -2);
                            bool ret = subPreprocessor.doPreprocess(includeFilename, os, defineSet, ifStates);
                            if (!ret) {
                                std::cout << "Error in preprocessing\n";
                                return false;
                            }
                            os << "#line " << lineNo << " \"" << filename << "\"\n";
                        } else if (tokens[0] == "define") {
                           defineSet.insert(tokens[1]);
                           os << std::endl;
                        } else if (tokens[0] == "undef") {
                           defineSet.erase(tokens[1]);
                           os << std::endl;
                        } else if (tokens[0] == "ifdef") {
                           if (defineSet.find(tokens[1]) != defineSet.end() ) {
                                ifStates.push(true);
                           } else {
                              ifStates.push(false);
                           }
                           os << std::endl;
                        } else if (tokens[0] == "ifndef") {
                           if (defineSet.find(tokens[1]) == defineSet.end() ) {
                                ifStates.push(true);
                           } else {
                              ifStates.push(false);
                           }
                           os << std::endl;
                        } else {
                            std::cout << tokens[0] << " is not support" << std::endl;
                            return false;
                        }
                    }else {
                        return false;
                    }
                    
              }else if (ifStates.top()){
                os << buffer << std::endl;
              }
              
            }

            return true;
        }
    private:
        
        const static int bufferSize = 1024;
        char buffer[bufferSize];
};

}
#endif
Revision:	2469
Committed:	Fri Dec 2 15:38:03 2005 UTC (18 years, 7 months ago) by tim
File size:	6311 byte(s)
Log Message:	End of the Link --> List Return of the Oject-Oriented replace yacc/lex parser with antlr parser
#	Content
1	/*
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	#ifndef MDPARSER_SIMPLEPREPROCESSOR_HPP
43	#define MDPARSER_SIMPLEPREPROCESSOR_HPP
44	#include <iostream>
45	#include <set>
46	#include <fstream>
47	#include "utils/StringTokenizer.hpp"
48	#include "utils/Trim.hpp"
49	/**
50	* @class SimplePreprocessor
51	* @brief A simple preprocessor.
52	* @note only support #include #ifdef, #ifndef, #endif, #define and #undef, c-like multiple line
53	* comment is not support, macro substitude is not support.
54	*/
55	namespace oopse {
56	class SimplePreprocessor {
57	public:
58	bool preprocess(const std::string& filename, ostream& os) {
59	std::set<std::string> defineSet;
60	std::stack<bool> ifStates;
61
62	ifStates.push(true);
63	return doPreprocess(filename, os, defineSet, ifStates);
64	}
65
66	private:
67	bool doPreprocess(const std::string& filename, ostream& os, std::set<std::string>& defineSet, std::stack<bool>& ifStates) {
68	std::ifstream input(filename.c_str());
69
70	int lineNo =1;
71	os << "#line " << lineNo << " \"" << filename << "\"\n";
72	while(input.getline(buffer, bufferSize)) {
73	++lineNo;
74	std::string line = trimLeftCopy(buffer);
75	if (!line.empty() && line[0] == '#') {
76	StringTokenizer tokenizer(line.substr(1, line.length()));
77	std::vector<std::string> tokens = tokenizer.getAllTokens();
78	if (tokens.size() < 1 ) {
79	return false;
80	}
81	std::string keyword = tokens[0];
82	if (tokens[0] == "endif") {
83	ifStates.pop();
84	if (ifStates.empty()) {
85	std::cout << "Error in preprocessing: endif \n";
86	return false;
87	}
88	os << std::endl;
89	} else if (tokens.size() == 2) {
90	if (tokens[0] == "include") {
91	SimplePreprocessor subPreprocessor;
92	std::string includeFilename = tokens[1];
93	includeFilename = includeFilename.substr(1, includeFilename.length() -2);
94	bool ret = subPreprocessor.doPreprocess(includeFilename, os, defineSet, ifStates);
95	if (!ret) {
96	std::cout << "Error in preprocessing\n";
97	return false;
98	}
99	os << "#line " << lineNo << " \"" << filename << "\"\n";
100	} else if (tokens[0] == "define") {
101	defineSet.insert(tokens[1]);
102	os << std::endl;
103	} else if (tokens[0] == "undef") {
104	defineSet.erase(tokens[1]);
105	os << std::endl;
106	} else if (tokens[0] == "ifdef") {
107	if (defineSet.find(tokens[1]) != defineSet.end() ) {
108	ifStates.push(true);
109	} else {
110	ifStates.push(false);
111	}
112	os << std::endl;
113	} else if (tokens[0] == "ifndef") {
114	if (defineSet.find(tokens[1]) == defineSet.end() ) {
115	ifStates.push(true);
116	} else {
117	ifStates.push(false);
118	}
119	os << std::endl;
120	} else {
121	std::cout << tokens[0] << " is not support" << std::endl;
122	return false;
123	}
124	}else {
125	return false;
126	}
127
128	}else if (ifStates.top()){
129	os << buffer << std::endl;
130	}
131
132	}
133
134	return true;
135	}
136	private:
137
138	const static int bufferSize = 1024;
139	char buffer[bufferSize];
140	};
141
142	}
143	#endif