1 | // $Id: Gnuplot.cc 64 2006-01-20 09:02:37Z peter $ |
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2 | |
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3 | #include "Gnuplot.h" |
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4 | |
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5 | #include <cstdio> |
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6 | #include <unistd.h> |
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7 | #include <string> |
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8 | |
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9 | #include <iostream> |
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10 | |
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11 | namespace theplu { |
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12 | namespace svnstat { |
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13 | |
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14 | |
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15 | Gnuplot::Gnuplot(void) |
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16 | : linestyle_("steps"), pipe_(NULL) |
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17 | { |
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18 | acquire_program_path("gnuplot"); |
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19 | if (gnuplot_binary_.empty()) |
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20 | throw GnuplotException("Can't find gnuplot in your PATH"); |
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21 | |
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22 | pipe_=popen(gnuplot_binary_.c_str(),"w"); |
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23 | if (!pipe_) |
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24 | throw GnuplotException("Could'nt open connection to gnuplot"); |
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25 | } |
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26 | |
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27 | |
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28 | Gnuplot::~Gnuplot(void) |
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29 | { |
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30 | if (pclose(pipe_) == -1) |
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31 | throw GnuplotException("Problem closing communication to gnuplot"); |
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32 | for (std::list<std::string>::iterator i=tempfiles_.begin(); |
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33 | i!=tempfiles_.end(); i++) |
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34 | remove(i->c_str()); |
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35 | } |
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36 | |
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37 | |
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38 | void Gnuplot::acquire_program_path(const std::string& progname) |
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39 | { |
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40 | char* env_path=getenv("PATH"); // is there a need to free this memory? |
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41 | if (!env_path) |
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42 | throw GnuplotException("Environment variable PATH is not set"); |
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43 | |
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44 | std::list<std::string> paths; |
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45 | tokenizer(env_path,paths); |
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46 | for (std::list<std::string>::const_iterator i=paths.begin(); |
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47 | i!=paths.end(); ++i) { |
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48 | std::string tmp((*i) + '/' + progname); |
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49 | if (!access(tmp.c_str(),X_OK)) { |
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50 | gnuplot_binary_=tmp; |
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51 | break; |
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52 | } |
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53 | } |
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54 | |
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55 | if (gnuplot_binary_.empty()) |
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56 | throw GnuplotException("Cannot find '" + progname + "' in PATH"); |
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57 | } |
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58 | |
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59 | |
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60 | void Gnuplot::date_plot(const std::vector<double>& y, |
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61 | const std::string& format) |
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62 | { |
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63 | command(std::string("set xdata time")); |
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64 | command("set timefmt '" + date_input_format_ + "'"); |
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65 | command("set format x '" + format + "'"); |
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66 | plot(y,date_,"plot"); |
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67 | } |
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68 | |
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69 | |
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70 | void Gnuplot::date_replot(const std::vector<double>& y, |
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71 | const std::string& format) |
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72 | { |
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73 | // Peter is this working, really? |
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74 | //command(std::string("set xdata time")); |
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75 | //command("set format x '" + format + "'"); |
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76 | plot(y,date_,"replot"); |
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77 | } |
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78 | |
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79 | |
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80 | void Gnuplot::tokenizer(const std::string& in, |
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81 | std::list<std::string>& tokens, |
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82 | const std::string& delimiters) |
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83 | { |
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84 | std::string::size_type previous_pos=in.find_first_not_of(delimiters,0); |
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85 | std::string::size_type position=in.find_first_of(delimiters,previous_pos); |
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86 | while ((std::string::npos!=position) || (std::string::npos!=previous_pos)) { |
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87 | tokens.push_back(in.substr(previous_pos, position-previous_pos)); |
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88 | previous_pos=in.find_first_not_of(delimiters,position); |
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89 | position=in.find_first_of(delimiters,previous_pos); |
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90 | } |
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91 | } |
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92 | |
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93 | |
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94 | void Gnuplot::command(std::string cmdstr) |
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95 | { |
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96 | if (*(cmdstr.rbegin())!='\n') |
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97 | cmdstr+='\n'; |
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98 | fputs(cmdstr.c_str(),pipe_); |
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99 | fflush(pipe_); |
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100 | } |
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101 | |
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102 | |
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103 | }} // end of namespace svnstat and namespace theplu |
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