1 | #ifndef _theplu_svndigest_gnuplot_ |
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2 | #define _theplu_svndigest_gnuplot_ |
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3 | |
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4 | // $Id: Gnuplot.h 165 2006-08-24 07:38:19Z jari $ |
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5 | |
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6 | /* |
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7 | Copyright (C) 2006 Jari Häkkinen, Peter Johansson |
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8 | |
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9 | This file is part of svndigest, http://lev.thep.lu.se/trac/svndigest |
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10 | |
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11 | svndigest is free software; you can redistribute it and/or modify it |
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12 | under the terms of the GNU General Public License as published by |
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13 | the Free Software Foundation; either version 2 of the License, or |
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14 | (at your option) any later version. |
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15 | |
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16 | svndigest is distributed in the hope that it will be useful, but |
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17 | WITHOUT ANY WARRANTY; without even the implied warranty of |
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18 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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19 | General Public License for more details. |
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20 | |
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21 | You should have received a copy of the GNU General Public License |
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22 | along with this program; if not, write to the Free Software |
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23 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA |
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24 | 02111-1307, USA. |
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25 | */ |
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26 | |
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27 | #include <cassert> |
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28 | #include <cstdio> |
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29 | #include <list> |
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30 | #include <stdexcept> |
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31 | #include <sstream> |
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32 | #include <string> |
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33 | #include <vector> |
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34 | |
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35 | |
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36 | #include <iostream> |
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37 | |
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38 | namespace theplu { |
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39 | namespace svndigest { |
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40 | |
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41 | /// |
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42 | /// If something goes wrong in the use of the Gnuplot class, a |
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43 | /// GnuplotException is thrown. |
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44 | /// |
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45 | struct GnuplotException : public std::runtime_error |
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46 | { inline GnuplotException(const std::string& msg) : runtime_error(msg) {} }; |
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47 | |
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48 | /// |
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49 | /// The Gnuplot class creates a pipe to 'gnuplot' and facilitates |
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50 | /// communication with the gnuplot binary. |
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51 | /// |
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52 | /// @see GnuplotFE |
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53 | /// |
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54 | class Gnuplot |
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55 | { |
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56 | public: |
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57 | /// |
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58 | /// This constructor sets up the pipe to the first gnuplot |
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59 | /// executable found in the PATH environment variable. The PATH |
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60 | /// variable must exist. |
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61 | /// |
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62 | /// @throw Throws a GnuplotException if a no PATH variable is |
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63 | /// found, if the gnuplot binary cannot be found, or if a pipe |
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64 | /// cannot to the gnuplot binary cannot be established. |
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65 | /// |
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66 | Gnuplot(void); |
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67 | |
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68 | /// |
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69 | /// The destructor, closes the pipe to the gnuplot binary. |
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70 | /// |
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71 | virtual ~Gnuplot(void); |
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72 | |
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73 | /// |
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74 | /// @brief Send arbitrary commands to Gnuplot. |
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75 | /// |
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76 | /// @return 0 on success (underlying fputs, fputc, and fflush are |
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77 | /// succesful), EOF otherwise. |
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78 | /// |
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79 | int command(const std::string&); |
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80 | |
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81 | /// |
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82 | /// Set the \a style of the line in the subsequent plot or |
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83 | /// replot calls. The setting applies until this function is |
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84 | /// called again. |
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85 | /// |
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86 | /// @note The \a style is not checked to be valid. |
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87 | /// |
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88 | inline void linestyle(const std::string& style) { linestyle_=style; } |
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89 | |
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90 | /// |
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91 | /// Set the \a title of the line in the subsequent plot or |
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92 | /// replot calls. The setting applies until this function is |
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93 | /// called again. |
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94 | /// |
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95 | inline void linetitle(const std::string& title) { linetitle_=title; } |
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96 | |
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97 | /// |
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98 | /// Plot the data \a y as a function of \a x using the Gnuplot |
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99 | /// 'plot' command. The \a x vector can be omitted as in normal |
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100 | /// Gnuplot usage. |
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101 | /// |
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102 | /// @return 0 on success, EOF otherwise. |
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103 | /// |
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104 | template <class T1, class T2> |
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105 | int plot(const std::vector<T1>& y, const std::vector<T2>& x) |
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106 | { return plot(y,x,"plot"); } |
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107 | |
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108 | template <class T1> |
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109 | int plot(const std::vector<T1>& y,const std::vector<T1>& x=std::vector<T1>()) |
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110 | { return plot(y,x,"plot"); } |
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111 | |
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112 | /// |
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113 | /// Plot the data \a y as a function of \a x using the Gnuplot |
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114 | /// 'replot' command. The \a x vector can be omitted as in normal |
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115 | /// Gnuplot usage. |
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116 | /// |
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117 | /// @return 0 on success, EOF otherwise. |
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118 | /// |
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119 | template <class T1, class T2> |
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120 | int replot(const std::vector<T1>& y, const std::vector<T2>& x) |
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121 | { return plot(y,x,"replot"); } |
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122 | |
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123 | template <class T1> |
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124 | int replot(const std::vector<T1>& y, |
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125 | const std::vector<T1>& x=std::vector<T1>()) |
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126 | { return plot(y,x,"replot"); } |
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127 | |
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128 | private: |
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129 | /// |
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130 | /// Copy constructor, not implemented. |
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131 | /// |
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132 | Gnuplot(const Gnuplot&); |
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133 | |
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134 | void acquire_program_path(const std::string&); |
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135 | |
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136 | /// |
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137 | /// @param \a plotcmd must be "plot" or "replot". |
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138 | /// |
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139 | template <class T1, class T2> |
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140 | int plot(const std::vector<T1>& y, const std::vector<T2>& x, |
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141 | const std::string& plotcmd) |
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142 | { |
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143 | assert(x.size()==y.size() || x.empty()); |
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144 | assert(plotcmd=="plot" || plotcmd=="replot"); |
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145 | |
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146 | std::ostringstream cmdstring; |
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147 | cmdstring << plotcmd << " '-' u 1:2 title '" << linetitle_ << "' with " |
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148 | << linestyle_ << '\n'; |
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149 | for (size_t i=0; i<y.size(); ++i) { |
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150 | if (!x.empty()) |
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151 | cmdstring << x[i] << '\t'; |
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152 | else |
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153 | cmdstring << i << '\t'; |
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154 | cmdstring << y[i] << '\n'; |
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155 | } |
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156 | cmdstring << "e\n"; |
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157 | |
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158 | return command(cmdstring.str()); |
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159 | } |
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160 | |
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161 | void tokenizer(const std::string& in, std::list<std::string>& tokens, |
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162 | const std::string& delimiters = ":"); |
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163 | |
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164 | std::string gnuplot_binary_; |
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165 | std::string linestyle_; |
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166 | std::string linetitle_; |
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167 | FILE* pipe_; |
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168 | }; |
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169 | |
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170 | }} // end of namespace svndigest and namespace theplu |
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171 | |
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172 | #endif |
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