Chaste Commit::ca8ccdedf819b6e02855bc0e8e6f50bdecbc5208
ColumnDataReader.cpp
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1/*
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34*/
35
42#include "ColumnDataReader.hpp"
44
45#include <fstream>
46#include <sstream>
47#include <iomanip>
48#include <cassert>
49#include <climits>
50#include <cctype> //for isdigit
51#include "OutputFileHandler.hpp"
52#include "Exception.hpp"
53
58const int NOT_READ = INT_UNSET;
59
60ColumnDataReader::ColumnDataReader(const std::string& rDirectory,
61 const std::string& rBaseName,
62 bool makeAbsolute)
63{
64 // Find out where files are really stored
65 std::string directory;
66 if (makeAbsolute)
67 {
68 OutputFileHandler output_file_handler(rDirectory, false);
69 directory = output_file_handler.GetOutputDirectoryFullPath();
70 }
71 else
72 {
73 // Add a trailing slash if needed
74 if (!(*(rDirectory.end()-1) == '/'))
75 {
76 directory = rDirectory + "/";
77 }
78 else
79 {
80 directory = rDirectory;
81 }
82 }
83 CheckFiles(directory, rBaseName);
84}
85
87 const std::string& rBaseName)
88{
89 if (!rDirectory.IsDir() || !rDirectory.Exists())
90 {
91 EXCEPTION("Directory does not exist: " + rDirectory.GetAbsolutePath());
92 }
93 CheckFiles(rDirectory.GetAbsolutePath(), rBaseName);
94}
95
96void ColumnDataReader::CheckFiles(const std::string& rDirectory, const std::string& rBaseName)
97{
98 // Read in info file
99 mInfoFilename = rDirectory + rBaseName + ".info";
100 std::ifstream infofile(mInfoFilename.c_str(), std::ios::in);
101
102 // If it doesn't exist - throw exception
103 if (!infofile.is_open())
104 {
105 EXCEPTION("Couldn't open info file: " + mInfoFilename);
106 }
107 std::string junk;
111
112 infofile >> junk;
113 infofile >> mNumFixedDimensions >> junk;
114 infofile >> mHasUnlimitedDimension >> junk;
115 infofile >> mNumVariables;
116
118 {
119 infofile.close();
120 EXCEPTION("Couldn't read info file correctly");
121 }
122
123 // Read in variables and associated them with a column number
125 {
126 if (mNumFixedDimensions < 1)
127 {
128 mDataFilename = rDirectory + rBaseName + ".dat";
129 }
130 else
131 {
132 std::stringstream suffix;
133 suffix << std::setfill('0') << std::setw(FILE_SUFFIX_WIDTH) << 0;
134
135 mDataFilename = rDirectory + rBaseName + "_" + suffix.str() + ".dat";
136
137 /*
138 * The ancillary path needs to come from a single place that is
139 * used by both the reader & writer, otherwise all will be bad.
140 */
141 mAncillaryFilename = rDirectory + rBaseName + "_unlimited.dat";
142
143 // Extract the units and place into map
144 std::ifstream ancillaryfile(mAncillaryFilename.c_str(), std::ios::in);
145
146 // If it doesn't exist - throw exception
147 if (!ancillaryfile.is_open())
148 {
149 EXCEPTION("Couldn't open ancillary data file");
150 }
151 std::string dimension;
152 std::getline(ancillaryfile, dimension);
153 std::stringstream dimension_stream(dimension);
154 std::string dimension_unit, dimension_name, header;
155 dimension_stream >> header;
156
157 // Separate into variable name and units
158 int unitpos = header.find("(") + 1;
159
160 dimension_name = header.substr(0, unitpos - 1);
161 dimension_unit = header.substr(unitpos, header.length() - unitpos - 1);
162
163 mVariablesToUnits[dimension_name] = dimension_unit;
164 ancillaryfile.close();
165 }
166 }
167 else
168 {
169 mDataFilename = rDirectory + rBaseName + ".dat";
170 }
171
172 std::ifstream datafile(mDataFilename.c_str(), std::ios::in);
173 // If it doesn't exist - throw exception
174 if (!datafile.is_open())
175 {
176 EXCEPTION("Couldn't open data file");
177 }
178
179 std::string variables;
180 std::getline(datafile, variables);
181 std::stringstream variable_stream(variables);
182 std::string header, variable, unit;
183 int column = 0;
184
185 // Insert variables into map
186 while (variable_stream >> header)
187 {
188 // Separate into variable name and units
189 int unitpos = header.find("(") + 1;
190
191 variable = header.substr(0, unitpos - 1);
192 unit = header.substr(unitpos, header.length() - unitpos - 1);
193
194 mVariablesToColumns[variable] = column;
195 mVariablesToUnits[variable] = unit;
196
197 column++;
198 }
199
200 /*
201 * Now read the first line of proper data to determine the field width used when this
202 * file was created. Do this by
203 * 1. reading the first entry and measuring the distance from
204 * the decimal point to the 'e'. This gives the precision; the field width is then
205 * precision + 7 (With MSVC on Windows, it's precision + 8).
206 * e.g. if the first entry is
207 * 6.3124e+01 => field width = 11 // chaste release 1 and 1.1
208 * -3.5124e+01 => field width = 11 // chaste release 1 and 1.1
209 * +1.00000000e+00 => field width = 15
210 * -1.20000000e+01 => field width = 15
211 * -1.12345678e-321 => field width = 15
212 * 2. Because the first column has a varying number of spaces read a few columns and
213 * do some modular arithmetic to work out the correct width
214 */
215 std::string first_line;
216 std::string first_entry;
217 unsigned last_pos=0u;
218 // Read the first entry of the line. If there is no first entry, move to the next line..
219 while (first_entry.length()==0 && !datafile.eof())
220 {
221 std::getline(datafile, first_line);
222 std::stringstream stream(first_line);
223 stream >> first_entry;
224 last_pos = stream.tellg(); // Where the first number ends (but it might be in the column 2 or 3)
225 while (stream.good() && last_pos <170) //Avoid reading more than about 10 columns, because we want to avoid last_pos being divisible by too many factors
226 {
227 std::string last_entry;
228 stream >> last_entry;
229 if (stream.tellg() > 0)
230 {
231 last_pos = stream.tellg();
232 }
233 }
234 }
235
236 if (datafile.eof() && first_entry.length()==0)
237 {
238 EXCEPTION("Unable to determine field width from file as cannot find any data entries");
239 }
240 assert (last_pos > 0u);
241
242 size_t dot_pos = first_entry.find(".");
243 size_t e_pos = first_entry.find("e");
244 if (dot_pos == std::string::npos || e_pos == std::string::npos)
245 {
246 EXCEPTION("Badly formatted scientific data field");
247 }
248
249 unsigned est_field_width = e_pos - dot_pos - 1 + 8; // = Precision + 8
250
251 if (last_pos % est_field_width == 0)
252 {
253 mFieldWidth = est_field_width;
254 }
255 else
256 {
257 assert ( last_pos % (est_field_width+1) == 0 || (last_pos+1) % (est_field_width+1) == 0 );
258 mFieldWidth = est_field_width+1;
259 }
260 infofile.close();
261 datafile.close();
262}
263
264std::vector<double> ColumnDataReader::GetValues(const std::string& rVariableName)
265{
266 if (mNumFixedDimensions > 0)
267 {
268 EXCEPTION("Data file has fixed dimension which must be specified");
269 }
270
271 std::map<std::string, int>::iterator col = mVariablesToColumns.find(rVariableName);
272 if (col == mVariablesToColumns.end())
273 {
274 std::stringstream variable_name;
275 variable_name << rVariableName;
276 EXCEPTION("'" + variable_name.str() + "' is an unknown variable.");
277 }
278
279 int column = (*col).second;
281
282 return mValues;
283}
284
285std::vector<double> ColumnDataReader::GetValues(const std::string& rVariableName,
286 int fixedDimension)
287{
288 if (mNumFixedDimensions < 1)
289 {
290 EXCEPTION("Data file has no fixed dimension");
291 }
292
293 mValues.clear();
295 {
296 std::string datafile = mDataFilename;
297 std::map<std::string, int>::iterator col = mVariablesToColumns.find(rVariableName);
298 if (col == mVariablesToColumns.end())
299 {
300 EXCEPTION("Unknown variable");
301 }
302 int column = (*col).second;
303
304 int counter = 1;
305 while (true)
306 {
307 try
308 {
309 ReadValueFromFile(datafile, column, fixedDimension);
310 }
311 catch (const Exception&)
312 {
313 break;
314 }
315
316 // Advance counter
317 std::string::size_type underscore_pos = datafile.rfind("_", datafile.length());
318 std::stringstream suffix;
319
320 suffix << std::setfill('0') << std::setw(FILE_SUFFIX_WIDTH) << counter;
321
322 if (underscore_pos != std::string::npos)
323 {
324 datafile = datafile.substr(0, underscore_pos+1) + suffix.str() + ".dat";
325 }
326 counter++;
327 }
328 }
329 else
330 {
331 int column = mVariablesToColumns[rVariableName];
332 if (0 == column)
333 {
334 EXCEPTION("Unknown variable");
335 }
336 ReadValueFromFile(mDataFilename, column, fixedDimension);
337 }
338
339 return mValues;
340}
341
343{
344 mValues.clear();
346 {
347 EXCEPTION("Data file has no unlimited dimension");
348 }
349 if (mNumFixedDimensions > 0)
350 {
351 // Read in from the ancillary file
353 }
354 else
355 {
356 // Read the first column
358 }
359 return mValues;
360}
361
362void ColumnDataReader::ReadValueFromFile(const std::string& rFilename, int col, int row)
363{
364 std::ifstream datafile(rFilename.c_str(), std::ios::in);
365 // If it doesn't exist - throw exception
366 if (!datafile.is_open())
367 {
368 EXCEPTION("Couldn't open data file");
369 }
370 std::string variable_values;
371 for (int i=0; i<row+1; i++)
372 {
373 std::getline(datafile, variable_values);
374 }
375
376 std::getline(datafile, variable_values);
377 this->PushColumnEntryFromLine(variable_values, col);
378
379 datafile.close();
380}
381
382void ColumnDataReader::ReadColumnFromFile(const std::string& rFilename, int col)
383{
384 // Empty the values vector
385 mValues.clear();
386
387 // Read in from the ancillary file
388 std::ifstream datafile(rFilename.c_str(), std::ios::in);
389 std::string value;
390
391 // We should have already checked that this file can be opened.
392 assert(datafile.is_open());
393
394 // The current variable becomes true just after reading the last line
395 bool end_of_file_reached = false;
396
397 // Skip header line
398 end_of_file_reached = std::getline(datafile, value).eof();
399
400 while (!end_of_file_reached)
401 {
402 end_of_file_reached = std::getline(datafile, value).eof();
403 this->PushColumnEntryFromLine(value, col);
404 }
405 datafile.close();
406}
407
408void ColumnDataReader::PushColumnEntryFromLine(const std::string& rLine, int col)
409{
410 std::string value;
411 unsigned startpos = col * mFieldWidth;
412 value = rLine.substr(startpos, mFieldWidth);
413
414 std::stringstream variable_stream(value);
415 double d_value;
416 variable_stream >> d_value;
417 if (variable_stream.fail())
418 {
419 if (variable_stream.eof()) //Missing data from column
420 {
421 d_value = DBL_MAX;
422 }
423 else
424 {
425// LCOV_EXCL_START
426 // Clang Objective C++ (on Mac OSX) treats reading very small numbers (<2e-308) as an error but other compilers just round to zero
427 d_value = 0.0;
428// LCOV_EXCL_STOP
429 }
430 }
431 mValues.push_back(d_value);
432}
433
434bool ColumnDataReader::HasValues(const std::string& rVariableName)
435{
436 std::map<std::string, int>::iterator col = mVariablesToColumns.find(rVariableName);
437 return !(col == mVariablesToColumns.end());
438}
439
441{
442 return mFieldWidth;
443}
const int FILE_SUFFIX_WIDTH
const int NOT_READ
const int INT_UNSET
Definition Exception.hpp:55
#define EXCEPTION(message)
std::string mInfoFilename
std::string mAncillaryFilename
void ReadColumnFromFile(const std::string &rFilename, int col)
void CheckFiles(const std::string &rDirectory, const std::string &rBaseName)
bool HasValues(const std::string &rVariableName)
ColumnDataReader(const std::string &rDirectory, const std::string &rBaseName, bool makeAbsolute=true)
std::string mDataFilename
void ReadValueFromFile(const std::string &rFilename, int col, int row)
void PushColumnEntryFromLine(const std::string &rLine, int col)
std::map< std::string, std::string > mVariablesToUnits
std::map< std::string, int > mVariablesToColumns
std::vector< double > GetUnlimitedDimensionValues()
std::vector< double > GetValues(const std::string &rVariableName)
std::vector< double > mValues
std::string GetAbsolutePath() const
bool IsDir() const
bool Exists() const
std::string GetOutputDirectoryFullPath() const