src/io/SectionParserManager.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. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. 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.
 *
 * SUPPORT OPEN SCIENCE!  If you use OpenMD or its source code in your
 * research, please cite the appropriate papers when you publish your
 * work.  Good starting points are:
 *                                                                      
 * [1]  Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).             
 * [2]  Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).          
 * [3]  Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008).          
 * [4]  Vardeman & Gezelter, in progress (2009).                        
 */
#include <algorithm> 
#include <stack>
#include <cstdio>
#include "io/SectionParserManager.hpp"
#include "utils/Trim.hpp"
#include "utils/simError.h"

namespace OpenMD {

  SectionParserManager::~SectionParserManager() {
    SectionParserManager::iterator i;
    for (i = sectionParsers_.begin(); i != sectionParsers_.end(); ++i) {
      delete (i->sectionParser);
    }
    sectionParsers_.clear();
  }

  void SectionParserManager::parse(std::istream& input, ForceField& ff) {

    //reset active flags
    SectionParserManager::iterator i;
    for (i = sectionParsers_.begin(); i != sectionParsers_.end(); ++i) {
      i->isActive = false;
    }

    const int bufferSize = 65535;
    char buffer[bufferSize];
    int lineNo = 0;
    std::stack<std::string> sectionNameStack;
    //scan through the input stream and find section names        
    while(input.getline(buffer, bufferSize)) {
      ++lineNo;
        
      std::string line = trimLeftCopy(buffer);
      //a line begins with "//" is a comment line
      if ( line.empty() || (line.size() >= 2 && line[0] == '/' 
                            && line[1] == '/') ) {
        continue;
      } else {        
        StringTokenizer tokenizer(line);
        if (tokenizer.countTokens() < 2) {
          continue;
        } else {
          std::string keyword = tokenizer.nextToken();

          if (keyword == "begin") {
            std::string section = tokenizer.nextToken();
            sectionNameStack.push(section);
 
            i = std::find_if(sectionParsers_.begin(), sectionParsers_.end(),
                       SameSectionParserFunctor(section));
            if (i == sectionParsers_.end()){
              sprintf(painCave.errMsg, 
                "SectionParserManager Error: Can not find corresponding "
                "section parser for %s\n",
                section.c_str());
              painCave.isFatal = 1;
              simError();                        
            } else {
              if (i->isActive) {
          sprintf(painCave.errMsg, "SectionParserManager Error:find multiple %s "
                  "section\n",
                  section.c_str());
          painCave.isFatal = 1;
          simError();                        
              } else {                         
          i->isActive = true;
          i->lineNo = lineNo;
          i->offset = input.tellg();
              }
            }
          } else if (keyword == "end") {
            std::string section = tokenizer.nextToken();
            if (sectionNameStack.top() == section) {
              sectionNameStack.pop();
            } else {
              sprintf(painCave.errMsg, "SectionParserManager Error: begin %s and end %s does not match at line %d\n",
                sectionNameStack.top().c_str(), section.c_str(), lineNo);
              painCave.isFatal = 1;
              simError();
            }
      
          } else {
            continue;
          }
        }
      }
      
    }
    
    if (!sectionNameStack.empty()) {
      sprintf(painCave.errMsg, "SectionParserManager Error: stack is not empty\n");
      painCave.isFatal = 1;
      simError();
    }
    
    //invoke parser
    for (i = sectionParsers_.begin(); i != sectionParsers_.end(); ++i) {
      if (i->isActive) {
        //C++ standard does not guarantee seekg  reset EOF, in that case, seekg will fail
        //It is always a good idea to call clear() before seek
        input.clear();            
        input.seekg(i->offset);
        (i->sectionParser)->parse(input, ff, i->lineNo);
        (i->sectionParser)->validateSection();
      }
    }
    
  }
  
  void SectionParserManager::push_front(SectionParser* sp) {
    SectionParserManager::iterator i;
    i = findSectionParser(sp->getSectionName());
    if (i != sectionParsers_.end()) {
      std::cerr << sp->getSectionName() << " section parser already exists" 
      << std::endl;
      return;
    }
    
    SectionParserContext context;
    
    if (sectionParsers_.empty()) {
      context.priority = beginPriority_;
    } else {
      context.priority = sectionParsers_.front().priority - priorityDifference_;
    }
    
    context.sectionParser = sp;
    context.lineNo = 0;
    context.offset = 0;
    context.isActive = false;

    sectionParsers_.push_front(context);
  }

  void SectionParserManager::push_back(SectionParser* sp) {
    SectionParserManager::iterator i;
    i = findSectionParser(sp->getSectionName());
    if (i != sectionParsers_.end()) {
      std::cerr << sp->getSectionName() << " section parser already exists" 
      << std::endl;
      return;
    }

    SectionParserContext context;    
    if (sectionParsers_.empty()) {
      context.priority = beginPriority_;
    } else {
      context.priority = sectionParsers_.back().priority + priorityDifference_;
    }

    context.sectionParser = sp;
    context.lineNo = 0;
    context.offset = 0;
    context.isActive = false;

    sectionParsers_.push_back(context);

  }

  void SectionParserManager::insert(SectionParser* sp, int priority) {
    SectionParserManager::iterator i;
    i = findSectionParser(sp->getSectionName());
    if (i != sectionParsers_.end()) {
      std::cerr << sp->getSectionName() << " section parser already exists" 
      << std::endl;
    }

    SectionParserContext context;    
    context.priority = priority;
    context.sectionParser = sp;
    context.lineNo = 0;
    context.offset = 0;
    context.isActive = false;

    if (sectionParsers_.empty()) {
      sectionParsers_.push_back(context);
    } else {

      for (i = sectionParsers_.begin(); i != sectionParsers_.end(); ++i) {
        if (i->priority == priority) {
          std::cerr << "Priority " << priority << " already used" << std::endl;
          return;
        } else if (i->priority > priority) {
          sectionParsers_.insert(i, context);
          break;
        }
            
      }
    }

  }


  SectionParserManager::iterator SectionParserManager::findSectionParser(const std::string& sectionName) {
    SectionParserManager::iterator i;
    for (i = sectionParsers_.begin(); i != sectionParsers_.end(); ++i) {
      if (i->sectionParser->getSectionName() == sectionName) {
        break;
      }
    }

    return i;
  }

}
Revision:	1465
Committed:	Fri Jul 9 23:08:25 2010 UTC (15 years, 3 months ago) by chuckv
File size:	8091 byte(s)
Log Message:	Creating busticated version of OpenMD
#	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. Redistributions of source code must retain the above copyright
10	* notice, this list of conditions and the following disclaimer.
11	*
12	* 2. Redistributions in binary form must reproduce the above copyright
13	* notice, this list of conditions and the following disclaimer in the
14	* documentation and/or other materials provided with the
15	* distribution.
16	*
17	* This software is provided "AS IS," without a warranty of any
18	* kind. All express or implied conditions, representations and
19	* warranties, including any implied warranty of merchantability,
20	* fitness for a particular purpose or non-infringement, are hereby
21	* excluded. The University of Notre Dame and its licensors shall not
22	* be liable for any damages suffered by licensee as a result of
23	* using, modifying or distributing the software or its
24	* derivatives. In no event will the University of Notre Dame or its
25	* licensors be liable for any lost revenue, profit or data, or for
26	* direct, indirect, special, consequential, incidental or punitive
27	* damages, however caused and regardless of the theory of liability,
28	* arising out of the use of or inability to use software, even if the
29	* University of Notre Dame has been advised of the possibility of
30	* such damages.
31	*
32	* SUPPORT OPEN SCIENCE! If you use OpenMD or its source code in your
33	* research, please cite the appropriate papers when you publish your
34	* work. Good starting points are:
35	*
36	* [1] Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).
37	* [2] Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).
38	* [3] Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008).
39	* [4] Vardeman & Gezelter, in progress (2009).
40	*/
41	#include <algorithm>
42	#include <stack>
43	#include <cstdio>
44	#include "io/SectionParserManager.hpp"
45	#include "utils/Trim.hpp"
46	#include "utils/simError.h"
47
48	namespace OpenMD {
49
50	SectionParserManager::~SectionParserManager() {
51	SectionParserManager::iterator i;
52	for (i = sectionParsers_.begin(); i != sectionParsers_.end(); ++i) {
53	delete (i->sectionParser);
54	}
55	sectionParsers_.clear();
56	}
57
58	void SectionParserManager::parse(std::istream& input, ForceField& ff) {
59
60	//reset active flags
61	SectionParserManager::iterator i;
62	for (i = sectionParsers_.begin(); i != sectionParsers_.end(); ++i) {
63	i->isActive = false;
64	}
65
66	const int bufferSize = 65535;
67	char buffer[bufferSize];
68	int lineNo = 0;
69	std::stack<std::string> sectionNameStack;
70	//scan through the input stream and find section names
71	while(input.getline(buffer, bufferSize)) {
72	++lineNo;
73
74	std::string line = trimLeftCopy(buffer);
75	//a line begins with "//" is a comment line
76	if ( line.empty() \|\| (line.size() >= 2 && line[0] == '/'
77	&& line[1] == '/') ) {
78	continue;
79	} else {
80	StringTokenizer tokenizer(line);
81	if (tokenizer.countTokens() < 2) {
82	continue;
83	} else {
84	std::string keyword = tokenizer.nextToken();
85
86	if (keyword == "begin") {
87	std::string section = tokenizer.nextToken();
88	sectionNameStack.push(section);
89
90	i = std::find_if(sectionParsers_.begin(), sectionParsers_.end(),
91	SameSectionParserFunctor(section));
92	if (i == sectionParsers_.end()){
93	sprintf(painCave.errMsg,
94	"SectionParserManager Error: Can not find corresponding "
95	"section parser for %s\n",
96	section.c_str());
97	painCave.isFatal = 1;
98	simError();
99	} else {
100	if (i->isActive) {
101	sprintf(painCave.errMsg, "SectionParserManager Error:find multiple %s "
102	"section\n",
103	section.c_str());
104	painCave.isFatal = 1;
105	simError();
106	} else {
107	i->isActive = true;
108	i->lineNo = lineNo;
109	i->offset = input.tellg();
110	}
111	}
112	} else if (keyword == "end") {
113	std::string section = tokenizer.nextToken();
114	if (sectionNameStack.top() == section) {
115	sectionNameStack.pop();
116	} else {
117	sprintf(painCave.errMsg, "SectionParserManager Error: begin %s and end %s does not match at line %d\n",
118	sectionNameStack.top().c_str(), section.c_str(), lineNo);
119	painCave.isFatal = 1;
120	simError();
121	}
122
123	} else {
124	continue;
125	}
126	}
127	}
128
129	}
130
131	if (!sectionNameStack.empty()) {
132	sprintf(painCave.errMsg, "SectionParserManager Error: stack is not empty\n");
133	painCave.isFatal = 1;
134	simError();
135	}
136
137	//invoke parser
138	for (i = sectionParsers_.begin(); i != sectionParsers_.end(); ++i) {
139	if (i->isActive) {
140	//C++ standard does not guarantee seekg reset EOF, in that case, seekg will fail
141	//It is always a good idea to call clear() before seek
142	input.clear();
143	input.seekg(i->offset);
144	(i->sectionParser)->parse(input, ff, i->lineNo);
145	(i->sectionParser)->validateSection();
146	}
147	}
148
149	}
150
151	void SectionParserManager::push_front(SectionParser* sp) {
152	SectionParserManager::iterator i;
153	i = findSectionParser(sp->getSectionName());
154	if (i != sectionParsers_.end()) {
155	std::cerr << sp->getSectionName() << " section parser already exists"
156	<< std::endl;
157	return;
158	}
159
160	SectionParserContext context;
161
162	if (sectionParsers_.empty()) {
163	context.priority = beginPriority_;
164	} else {
165	context.priority = sectionParsers_.front().priority - priorityDifference_;
166	}
167
168	context.sectionParser = sp;
169	context.lineNo = 0;
170	context.offset = 0;
171	context.isActive = false;
172
173	sectionParsers_.push_front(context);
174	}
175
176	void SectionParserManager::push_back(SectionParser* sp) {
177	SectionParserManager::iterator i;
178	i = findSectionParser(sp->getSectionName());
179	if (i != sectionParsers_.end()) {
180	std::cerr << sp->getSectionName() << " section parser already exists"
181	<< std::endl;
182	return;
183	}
184
185	SectionParserContext context;
186	if (sectionParsers_.empty()) {
187	context.priority = beginPriority_;
188	} else {
189	context.priority = sectionParsers_.back().priority + priorityDifference_;
190	}
191
192	context.sectionParser = sp;
193	context.lineNo = 0;
194	context.offset = 0;
195	context.isActive = false;
196
197	sectionParsers_.push_back(context);
198
199	}
200
201	void SectionParserManager::insert(SectionParser* sp, int priority) {
202	SectionParserManager::iterator i;
203	i = findSectionParser(sp->getSectionName());
204	if (i != sectionParsers_.end()) {
205	std::cerr << sp->getSectionName() << " section parser already exists"
206	<< std::endl;
207	}
208
209	SectionParserContext context;
210	context.priority = priority;
211	context.sectionParser = sp;
212	context.lineNo = 0;
213	context.offset = 0;
214	context.isActive = false;
215
216	if (sectionParsers_.empty()) {
217	sectionParsers_.push_back(context);
218	} else {
219
220	for (i = sectionParsers_.begin(); i != sectionParsers_.end(); ++i) {
221	if (i->priority == priority) {
222	std::cerr << "Priority " << priority << " already used" << std::endl;
223	return;
224	} else if (i->priority > priority) {
225	sectionParsers_.insert(i, context);
226	break;
227	}
228
229	}
230	}
231
232	}
233
234
235	SectionParserManager::iterator SectionParserManager::findSectionParser(const std::string& sectionName) {
236	SectionParserManager::iterator i;
237	for (i = sectionParsers_.begin(); i != sectionParsers_.end(); ++i) {
238	if (i->sectionParser->getSectionName() == sectionName) {
239	break;
240	}
241	}
242
243	return i;
244	}
245
246	}