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annotate include/utils.hpp @ 398:3399bd48cb40

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Ajout d'une méthode pour obtenir le nombre de FPS Méthode de capture des trames vidéos plus résistante aux erreur Utilisation d'un dictionnaire pour les fichier de configuration afin de garder le nom des sections
author Jean-Philippe Jodoin <jpjodoin@gmail.com>
date Mon, 29 Jul 2013 13:46:07 -0400
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children bee0e7407af7
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1 #ifndef UTILS_HPP
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2 #define UTILS_HPP
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4 #include <iosfwd>
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5 #include <string>
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6 #include <vector>
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8 static const double pi = 3.14159265358979323846;
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9
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10 static const std::string separator = " ";
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11 const char commentChar = '#';
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13 /** Loads lines of numbers from a text file, separated by some character */
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14 std::vector<std::vector<float> > loadNumbers(const std::string& filename, const std::string& separator = ::separator);
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16 /** Gets line in a file, skipping comments (starting with '#') (wrapper around getline).
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17 * Warning: returns an empty string if all the lines to the end of the file are comments. */
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18 std::string getlineComment(std::ifstream& f);
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20 /** Converts a string to an integer. */
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21 int toInt(const std::string& s);
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23 /** Converts a string to a float. */
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24 float toFloat(const std::string& s);
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26 /** Converts a string to a double. */
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27 double toDouble(const std::string& s);
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29 /** Opens file for writing with fixed scientific precision. */
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30 void openWriteScientificPrecision(std::ofstream& out, const std::string& filename, const int& precision);
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32 void openWritePrecision(std::ofstream& out, const std::string& filename, const int& precision);
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34 /** Opens files and checks how it went. */
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35 bool openCheck(std::ifstream& f, const std::string& filename, const std::string& callingFunctionName);
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36 bool openCheck(std::ofstream& f, const std::string& filename, const std::string& callingFunctionName);
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39 // inline
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40
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41 inline double square(const int& a) { return a*a;}
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43 /** Implements key bindings, for example for cvWaitKey(). */
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44 inline bool forwardKey(const int& pressedKey) { return (((char)pressedKey) == '+');}
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46 inline bool backwardKey(const int& pressedKey) { return (((char)pressedKey) == '-');}
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48 inline bool saveKey(const int& pressedKey) { return (((char)pressedKey) == 's' || ((char)pressedKey) == 'S');}
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50 inline bool interruptionKey(const int& pressedKey) { return (((char)pressedKey) == 'q' || ((char)pressedKey) == 'Q');}
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52 inline bool skipKey(const int& pressedKey) { return (((char)pressedKey) == 'n' || ((char)pressedKey) == 'N');}
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55 // templates
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56
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57 /** Splits a string on the separator. The resulting string items are added to the result (the list is not cleared). */
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58 template<class Seq>
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59 inline void split(Seq& result, const std::string& text, const std::string& separator = ::separator) {
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60 int n = text.length();
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62 int start = text.find_first_not_of(separator);
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63 while ((start >= 0) && (start < n)) {
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64 int stop = text.find_first_of(separator, start);
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65 if ((stop < 0) || (stop > n))
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66 stop = n;
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67 result.push_back(text.substr(start, stop - start));
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68 start = text.find_first_not_of(separator, stop+1);
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69 }
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70 }
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72 /** Converts strings to numbers. */
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73 template<typename T>
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74 bool fromString(T & result, const std::string & s) {
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75 std::istringstream iss(s);
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76 return iss >> result != 0;
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77 }
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78
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79 #endif