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 <sstream>
#include "utils/StringTokenizer.hpp"
#include "utils/Trim.hpp"
#include "utils/OOPSEException.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());
            if (!input.is_open()) {
                std::stringstream ss;
                ss << "Can not open " << filename << " for preprocessing\n";
                throw OOPSEException(ss.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:	2661
Committed:	Thu Mar 23 14:59:14 2006 UTC (18 years, 5 months ago) by tim
File size:	6583 byte(s)
Log Message:	Throw exception if the file can not be opened for preprocessing
#	User	Rev	Content
1	tim	2469	/*
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	tim	2661	#include <sstream>
48	tim	2469	#include "utils/StringTokenizer.hpp"
49			#include "utils/Trim.hpp"
50	tim	2661	#include "utils/OOPSEException.hpp"
51
52	tim	2469	/**
53			* @class SimplePreprocessor
54			* @brief A simple preprocessor.
55			* @note only support #include #ifdef, #ifndef, #endif, #define and #undef, c-like multiple line
56			* comment is not support, macro substitude is not support.
57			*/
58			namespace oopse {
59			class SimplePreprocessor {
60			public:
61			bool preprocess(const std::string& filename, ostream& os) {
62			std::set<std::string> defineSet;
63			std::stack<bool> ifStates;
64
65			ifStates.push(true);
66			return doPreprocess(filename, os, defineSet, ifStates);
67			}
68
69			private:
70			bool doPreprocess(const std::string& filename, ostream& os, std::set<std::string>& defineSet, std::stack<bool>& ifStates) {
71			std::ifstream input(filename.c_str());
72	tim	2661	if (!input.is_open()) {
73			std::stringstream ss;
74			ss << "Can not open " << filename << " for preprocessing\n";
75			throw OOPSEException(ss.str());
76			}
77	tim	2469	int lineNo =1;
78			os << "#line " << lineNo << " \"" << filename << "\"\n";
79			while(input.getline(buffer, bufferSize)) {
80			++lineNo;
81			std::string line = trimLeftCopy(buffer);
82			if (!line.empty() && line[0] == '#') {
83			StringTokenizer tokenizer(line.substr(1, line.length()));
84			std::vector<std::string> tokens = tokenizer.getAllTokens();
85			if (tokens.size() < 1 ) {
86			return false;
87			}
88			std::string keyword = tokens[0];
89			if (tokens[0] == "endif") {
90			ifStates.pop();
91			if (ifStates.empty()) {
92			std::cout << "Error in preprocessing: endif \n";
93			return false;
94			}
95			os << std::endl;
96			} else if (tokens.size() == 2) {
97			if (tokens[0] == "include") {
98			SimplePreprocessor subPreprocessor;
99			std::string includeFilename = tokens[1];
100			includeFilename = includeFilename.substr(1, includeFilename.length() -2);
101			bool ret = subPreprocessor.doPreprocess(includeFilename, os, defineSet, ifStates);
102			if (!ret) {
103			std::cout << "Error in preprocessing\n";
104			return false;
105			}
106			os << "#line " << lineNo << " \"" << filename << "\"\n";
107			} else if (tokens[0] == "define") {
108			defineSet.insert(tokens[1]);
109			os << std::endl;
110			} else if (tokens[0] == "undef") {
111			defineSet.erase(tokens[1]);
112			os << std::endl;
113			} else if (tokens[0] == "ifdef") {
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 if (tokens[0] == "ifndef") {
121			if (defineSet.find(tokens[1]) == defineSet.end() ) {
122			ifStates.push(true);
123			} else {
124			ifStates.push(false);
125			}
126			os << std::endl;
127			} else {
128			std::cout << tokens[0] << " is not support" << std::endl;
129			return false;
130			}
131			}else {
132			return false;
133			}
134
135			}else if (ifStates.top()){
136			os << buffer << std::endl;
137			}
138
139			}
140
141			return true;
142			}
143			private:
144
145			const static int bufferSize = 1024;
146			char buffer[bufferSize];
147			};
148
149			}
150			#endif