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annotate libinterp/dldfcn/__init_gnuplot__.cc @ 27862:813f76932ab6

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* __init_gnuplot__.cc: Eliminate static variable "toolkit_loaded".
author Markus Mützel <markus.muetzel@gmx.de>
date Sun, 22 Dec 2019 17:06:19 +0100
parents a9780be9ecbc
children b442ec6dda5c
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2
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3 Copyright (C) 2007-2019 John W. Eaton
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4
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5 This file is part of Octave.
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6
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7 Octave is free software: you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published by
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9 the Free Software Foundation, either version 3 of the License, or
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10 (at your option) any later version.
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11
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12 Octave is distributed in the hope that it will be useful, but
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13 WITHOUT ANY WARRANTY; without even the implied warranty of
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14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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15 GNU General Public License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with Octave; see the file COPYING. If not, see
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19 <https://www.gnu.org/licenses/>.
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20
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21 */
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22
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23 /*
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24
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25 To initialize:
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26
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27 graphics_toolkit ("gnuplot");
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28 plot (randn (1e3, 1));
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29
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30 */
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31
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32 #if defined (HAVE_CONFIG_H)
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33 # include "config.h"
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34 #endif
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35
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36 #include <string>
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37
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38 #include "dMatrix.h"
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39 #include "file-stat.h"
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40 #include "oct-env.h"
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41
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42 #include "build-env.h"
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43 #include "builtin-defun-decls.h"
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44 #include "defun-dld.h"
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45 #include "error.h"
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46 #include "graphics.h"
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47 #include "ov.h"
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48 #include "ovl.h"
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49 #include "parse.h"
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50 #include "utils.h"
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51 #include "variables.h"
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52
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53 // PKG_ADD: if (__have_gnuplot__ ()) register_graphics_toolkit ("gnuplot"); endif
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54
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55 class gnuplot_graphics_toolkit : public octave::base_graphics_toolkit
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56 {
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57 public:
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58 gnuplot_graphics_toolkit (octave::interpreter& interp)
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59 : octave::base_graphics_toolkit ("gnuplot"), m_interpreter (interp) { }
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60
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61 ~gnuplot_graphics_toolkit (void) = default;
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62
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63 bool is_valid (void) const { return true; }
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64
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65 bool initialize (const graphics_object& go)
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66 {
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67 return go.isa ("figure");
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68 }
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69
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70 void finalize (const graphics_object& go)
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71 {
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72 if (go.isa ("figure"))
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73 {
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74 const figure::properties& props
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75 = dynamic_cast<const figure::properties&> (go.get_properties ());
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76
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77 send_quit (props.get___plot_stream__ ());
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78 }
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79 }
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80
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81 void update (const graphics_object& go, int id)
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82 {
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83 if (go.isa ("figure"))
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84 {
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85 graphics_object obj (go);
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86
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87 figure::properties& props
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88 = dynamic_cast<figure::properties&> (obj.get_properties ());
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89
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90 switch (id)
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91 {
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92 case base_properties::ID_VISIBLE:
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93 if (! props.is_visible ())
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94 {
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95 send_quit (props.get___plot_stream__ ());
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96 props.set___plot_stream__ (Matrix ());
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97 props.set_graphicssmoothing (false);
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98 }
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99 break;
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100 }
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101 }
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102 }
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103
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104 void redraw_figure (const graphics_object& go) const
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105 {
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106 static bool drawnow_executing = false;
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107
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108 // Prevent recursion
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109 if (! drawnow_executing)
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110 {
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111 octave::unwind_protect frame;
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112 frame.protect_var (drawnow_executing);
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113
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114 drawnow_executing = true;
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115 octave_value_list args;
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116 args(0) = go.get_handle ().as_octave_value ();
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117 octave::feval ("__gnuplot_drawnow__", args);
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118 }
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119 }
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120
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121 void print_figure (const graphics_object& go, const std::string& term,
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122 const std::string& file,
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123 const std::string& debug_file) const
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124 {
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125 octave_value_list args;
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126 if (! debug_file.empty ())
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127 args(3) = debug_file;
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128 args(2) = file;
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129 args(1) = term;
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130 args(0) = go.get_handle ().as_octave_value ();
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131 octave::feval ("__gnuplot_drawnow__", args);
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132 }
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133
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134 Matrix get_canvas_size (const graphics_handle&) const
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135 {
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136 Matrix sz (1, 2, 0.0);
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137 return sz;
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138 }
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139
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140 double get_screen_resolution (void) const
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141 { return 72.0; }
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142
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143 Matrix get_screen_size (void) const
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144 { return Matrix (1, 2, 0.0); }
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145
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146 void close (void)
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147 {
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148 if (m_interpreter.mislocked ("__init_gnuplot__"))
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149 m_interpreter.munlock ("__init_gnuplot__");
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150 }
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151
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152 private:
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153
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154 void send_quit (const octave_value& pstream) const
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155 {
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156 if (! pstream.isempty ())
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157 {
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158 octave_value_list args;
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159 Matrix fids = pstream.matrix_value ();
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160
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161 Ffputs (m_interpreter, ovl (fids(0), "\nquit;\n"));
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162
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163 Ffflush (m_interpreter, ovl (fids(0)));
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164 Fpclose (m_interpreter, ovl (fids(0)));
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165
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166 if (fids.numel () > 1)
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167 {
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168 Fpclose (m_interpreter, ovl (fids(1)));
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169
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170 if (fids.numel () > 2)
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171 Fwaitpid (ovl (fids(2)));
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172 }
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173 }
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174 }
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175
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176 octave::interpreter& m_interpreter;
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177 };
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178
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179 static bool
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180 have_gnuplot_binary (void)
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181 {
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182 const std::string exeext = octave::build_env::EXEEXT;
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183 const std::string path = octave::sys::env::getenv ("PATH");
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184 bool retval = false;
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185
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186 try
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187 {
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188 octave_value_list tmp
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189 = octave::feval ("gnuplot_binary", octave_value_list ());
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190
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191 if (tmp(0).is_string () && ! tmp(0).isempty ())
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192 {
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193 std::string gnuplot_binary = tmp(0).string_value ();
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194
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195 string_vector args (gnuplot_binary);
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196 std::string gnuplot_path = octave::search_path_for_file (path, args);
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197
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198 octave::sys::file_stat fs (gnuplot_path);
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199
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200 if (! fs.exists () && ! exeext.empty ())
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201 {
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202 args[0] += exeext;
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203
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204 gnuplot_path = octave::search_path_for_file (path, args);
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205
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206 fs = octave::sys::file_stat (gnuplot_path);
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207 }
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208
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209 retval = fs.exists ();
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210 }
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211 }
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212 catch (octave::execution_exception&)
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213 { }
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214
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215 return retval;
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216 }
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217
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218 // Initialize the gnuplot graphics toolkit.
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219
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220 DEFMETHOD_DLD (__init_gnuplot__, interp, , ,
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221 doc: /* -*- texinfo -*-
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222 @deftypefn {} {} __init_gnuplot__ ()
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223 Undocumented internal function.
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224 @end deftypefn */)
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225 {
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226 if (! have_gnuplot_binary ())
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227 error ("__init_gnuplot__: the gnuplot program is not available, see 'gnuplot_binary'");
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228 else if (! interp.mislocked ("__init_gnuplot__"))
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229 {
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230 octave::gtk_manager& gtk_mgr = interp.get_gtk_manager ();
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231
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232 octave::graphics_toolkit tk (new gnuplot_graphics_toolkit (interp));
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233 gtk_mgr.load_toolkit (tk);
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234
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235 interp.mlock ();
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236 }
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237
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238 return octave_value_list ();
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239 }
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240
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241 DEFUN_DLD (__have_gnuplot__, , ,
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242 doc: /* -*- texinfo -*-
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243 @deftypefn {} {@var{gnuplot_available} =} __have_gnuplot__ ()
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244 Undocumented internal function.
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245 @end deftypefn */)
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246 {
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247 return ovl (have_gnuplot_binary ());
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248 }
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249
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250 /*
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251 ## No test needed for internal helper function.
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252 %!assert (1)
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253 */