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annotate c/utils.cpp @ 144:b32947b002da

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added the code to read matrices from text files
author Nicolas Saunier <nicolas.saunier@polymtl.ca>
date Fri, 26 Aug 2011 19:38:11 -0400
parents a52653dca25d
children 7bf8084e720f
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1 #include "utils.hpp"
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2
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3 #include <boost/foreach.hpp>
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4
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5 #include <iostream>
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6 #include <fstream>
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7 #include <sstream>
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8
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9 using namespace std;
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10
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11 vector<vector<float> > loadNumbers(const string& filename, const string& separator /* = " " */) {
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12 ifstream in(filename.c_str());
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13 ::openCheck(in, filename, "loadNumbers");
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14 vector<vector<float> > result;
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15
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16 while (!in.eof()) {
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17 string line = ::getlineComment(in);
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18 vector<string> tokens;
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19 ::split(tokens, line, separator);
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20 vector<float> numbers;
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21 BOOST_FOREACH(string s, tokens)
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22 numbers.push_back(::toInt(s));
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23 if (!numbers.empty())
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24 result.push_back(numbers);
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25 }
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27 return result;
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28 }
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30 int toInt(const std::string& s) { int i; fromString(i, s); return i;} //atoi
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32 float toFloat(const std::string& s) { float x; fromString(x, s); return x;}// lexical_cast<float>(s)
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34 double toDouble(const std::string& s) { double x; fromString(x, s); return x;}
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35
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36 string getlineComment(ifstream& f) {
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37 string s;
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38 getline(f, s);
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39 while ((!f.eof()) && (s[0] == ::commentChar)) {
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40 getline(f, s);
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41 }
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43 if (s[0] == ::commentChar)
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44 s.clear();
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45 return s;
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46 }
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48 void openWriteScientificPrecision(ofstream& out, const string& filename, const int& precision) {
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49 ::openWritePrecision(out, filename, precision);
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50 out.setf(ios::scientific);
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51 }
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53 void openWritePrecision(ofstream& out, const string& filename, const int& precision) {
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54 out.open(filename.c_str(), ios::binary);
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55 ::openCheck(out, filename, "openWritePrecision");
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56 out.precision(precision);
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57 }
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59 bool openCheck(ifstream& f, const string& filename, const string& callingFunctionName) {
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60 if (!f.is_open()) {
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61 cerr << "Pb opening file " << filename << " in " << callingFunctionName << endl;
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62 return false;
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63 } else
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64 return true;
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65 }
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67 bool openCheck(ofstream& f, const string& filename, const string& callingFunctionName) {
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68 if (!f.is_open()) {
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69 cerr << "Pb opening file " << filename << " in " << callingFunctionName << endl;
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70 return false;
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71 } else
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72 return true;
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73 }