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annotate libinterp/dldfcn/__init_gnuplot__.cc @ 21220:d78e45987d6a

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rename octave::build_env namespace from octave::config * build-env-features.sh: Rename from ocgt-conf-features.sh. Update for new names. * build-env.h: Rename from oct-conf.h. Also declare features function. * build-env.in.cc: Rename from oct-conf.in.cc. * oct-conf-features.h: Delete. * libinterp/module.mk: Update. * toplev.cc, __init_gnuplot__.cc, octave.cc: Update for new names.
author John W. Eaton <jwe@octave.org>
date Sun, 07 Feb 2016 14:56:17 -0500
parents fcac5dbbf9ed
children 40de9f8f23a6
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1 /*
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2
19697
4197fc428c7d maint: Update copyright notices for 2015.
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3 Copyright (C) 2007-2015 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 the
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9 Free Software Foundation; either version 3 of the License, or (at your
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10 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 WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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15 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 <http://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 #ifdef 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 "build-env.h"
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37 #include "builtins.h"
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38 #include "defun-dld.h"
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39 #include "error.h"
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40 #include "file-stat.h"
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41 #include "graphics.h"
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42 #include "oct-env.h"
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43 #include "parse.h"
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44 #include "utils.h"
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45 #include "variables.h"
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46
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47 // PKG_ADD: if (__have_gnuplot__ ()) register_graphics_toolkit ("gnuplot"); endif
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48
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49 static bool toolkit_loaded = false;
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50
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51 class gnuplot_graphics_toolkit : public base_graphics_toolkit
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52 {
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53 public:
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54 gnuplot_graphics_toolkit (void)
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55 : base_graphics_toolkit ("gnuplot") { }
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56
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57 ~gnuplot_graphics_toolkit (void) { }
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58
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59 bool is_valid (void) const { return true; }
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60
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61 bool initialize (const graphics_object& go)
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62 {
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63 return go.isa ("figure");
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64 }
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65
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66 void finalize (const graphics_object& go)
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67 {
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68 if (go.isa ("figure"))
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69 {
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70 const figure::properties& props =
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71 dynamic_cast<const figure::properties&> (go.get_properties ());
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72
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73 send_quit (props.get___plot_stream__ ());
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74 }
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75 }
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76
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77 void update (const graphics_object& go, int id)
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78 {
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79 if (go.isa ("figure"))
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80 {
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81 graphics_object obj (go);
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82
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83 figure::properties& props =
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84 dynamic_cast<figure::properties&> (obj.get_properties ());
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85
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86 switch (id)
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87 {
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88 case base_properties::ID_VISIBLE:
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89 if (! props.is_visible ())
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90 {
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91 send_quit (props.get___plot_stream__ ());
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92 props.set___plot_stream__ (Matrix ());
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93 props.set___enhanced__ (false);
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94 }
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95 break;
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96 }
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97 }
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98 }
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99
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100 void redraw_figure (const graphics_object& go) const
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101 {
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102 octave_value_list args;
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103 args(0) = go.get_handle ().as_octave_value ();
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104 feval ("__gnuplot_drawnow__", args);
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105 }
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106
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107 void print_figure (const graphics_object& go, const std::string& term,
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108 const std::string& file, bool mono,
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109 const std::string& debug_file) const
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110 {
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111 octave_value_list args;
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112 if (! debug_file.empty ())
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113 args(4) = debug_file;
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114 args(3) = mono;
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115 args(2) = file;
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116 args(1) = term;
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117 args(0) = go.get_handle ().as_octave_value ();
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118 feval ("__gnuplot_drawnow__", args);
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119 }
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120
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121 Matrix get_canvas_size (const graphics_handle&) const
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122 {
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123 Matrix sz (1, 2, 0.0);
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124 return sz;
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125 }
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126
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127 double get_screen_resolution (void) const
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128 { return 72.0; }
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129
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130 Matrix get_screen_size (void) const
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131 { return Matrix (1, 2, 0.0); }
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132
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133 void close (void)
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134 {
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135 if (toolkit_loaded)
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136 {
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137 munlock ("__init_gnuplot__");
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138
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139 gtk_manager::unload_toolkit ("gnuplot");
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140
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141 toolkit_loaded = false;
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142 }
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143 }
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144
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145 private:
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146
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147 void send_quit (const octave_value& pstream) const
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148 {
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149 if (! pstream.is_empty ())
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150 {
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151 octave_value_list args;
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152 Matrix fids = pstream.matrix_value ();
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153
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154 Ffputs (ovl (fids(0), "\nquit;\n"));
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155
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156 Ffflush (ovl (fids(0)));
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157 Fpclose (ovl (fids(0)));
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158
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159 if (fids.numel () > 1)
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160 {
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161 Fpclose (ovl (fids(1)));
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162
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163 if (fids.numel () > 2)
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164 Fwaitpid (ovl (fids(2)));
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165 }
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166 }
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167 }
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168 };
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169
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170 static bool
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171 have_gnuplot_binary (void)
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172 {
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173 const std::string exeext = octave::build_env::EXEEXT;
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174 const std::string path = octave_env::getenv ("PATH");
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175
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176 octave_value_list tmp = feval ("gnuplot_binary", octave_value_list ());
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177 std::string gnuplot_binary = tmp(0).string_value ();
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178
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179 string_vector args (gnuplot_binary);
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180 std::string gnuplot_path = search_path_for_file (path, args);
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181
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182 file_stat fs (gnuplot_path);
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183
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184 if (! fs.exists () && ! exeext.empty ())
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185 {
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186 args[0] += exeext;
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187
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188 gnuplot_path = search_path_for_file (path, args);
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189
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190 fs = file_stat (gnuplot_path);
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191 }
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192
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193 return fs.exists ();
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194 }
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195
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196 // Initialize the gnuplot graphics toolkit.
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197
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198 DEFUN_DLD (__init_gnuplot__, , , "")
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199 {
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200 octave_value retval;
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201
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202 if (! have_gnuplot_binary ())
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203 error ("__init_gnuplot__: the gnuplot program is not available, see 'gnuplot_binary'");
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204 else if (! toolkit_loaded)
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205 {
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206 mlock ();
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207
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208 graphics_toolkit tk (new gnuplot_graphics_toolkit ());
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209 gtk_manager::load_toolkit (tk);
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210
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211 toolkit_loaded = true;
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212 }
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213
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214 return retval;
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215 }
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216
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217 DEFUN_DLD (__have_gnuplot__, , ,
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218 "-*- texinfo -*-\n\
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219 @deftypefn {} {@var{gnuplot_available} =} __have_gnuplot__ ()\n\
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220 Undocumented internal function.\n\
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221 @end deftypefn")
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222 {
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223 octave_value retval;
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224
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225 retval = have_gnuplot_binary ();
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226
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227 return retval;
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228 }
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229