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annotate libinterp/dldfcn/__init_gnuplot__.cc @ 29163:8f67ad8b3103

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maint: Updating naming conventions for exceptions and use const where possible. * GLCanvas.cc, interpreter-qobject.cc, file-editor-tab.cc, octave-qscintilla.cc, octave-qobject.cc, Cell.cc, __eigs__.cc, __magick_read__.cc, __qp__.cc, daspk.cc, dasrt.cc, dassl.cc, data.cc, file-io.cc, graphics.cc, graphics.in.h, input.cc, interpreter.cc, ls-mat-ascii.cc, lsode.cc, oct-handle.h, oct-map.cc, quad.cc, rand.cc, sparse.cc, sub2ind.cc, toplev.cc, utils.cc, __init_gnuplot__.cc, __ode15__.cc, cdef-object.cc, ov-base-diag.cc, ov-base-mat.cc, ov-base-sparse.cc, ov-base.cc, ov-fcn-handle.cc, ov-java.cc, ov-perm.cc, ov-range.cc, ov-re-diag.cc, ov-str-mat.cc, ov.cc, pt-assign.cc, pt-eval.cc, pt-idx.cc, pt-jit.cc, pt.cc, Array-util.cc, randmtzig.cc: Update naming conventions for exceptions to use initial letter of exception type. For example, "execution_exception" is named "ee", "index_exception" is "ie". Catch "const" exceptions where possible. * gzip.cc: Add block to catch and throw interrupt_exceptions before having a catch block "(...)" for everything else.
author Rik <rik@octave.org>
date Tue, 08 Dec 2020 13:25:03 -0800
parents ba5a0edff85e
children 7854d5752dd2
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rev   line source
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1 ////////////////////////////////////////////////////////////////////////
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2 //
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3 // Copyright (C) 2007-2020 The Octave Project Developers
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4 //
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5 // See the file COPYRIGHT.md in the top-level directory of this
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6 // distribution or <https://octave.org/copyright/>.
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7 //
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8 // This file is part of Octave.
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9 //
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10 // Octave is free software: you can redistribute it and/or modify it
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11 // under the terms of the GNU General Public License as published by
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12 // the Free Software Foundation, either version 3 of the License, or
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13 // (at your option) any later version.
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14 //
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15 // Octave is distributed in the hope that it will be useful, but
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16 // WITHOUT ANY WARRANTY; without even the implied warranty of
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17 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 // GNU General Public License for more details.
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19 //
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20 // You should have received a copy of the GNU General Public License
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21 // along with Octave; see the file COPYING. If not, see
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22 // <https://www.gnu.org/licenses/>.
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23 //
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24 ////////////////////////////////////////////////////////////////////////
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25
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26 /*
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27
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28 To initialize:
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29
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30 graphics_toolkit ("gnuplot");
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31 plot (randn (1e3, 1));
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32
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33 */
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34
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35 #if defined (HAVE_CONFIG_H)
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36 # include "config.h"
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37 #endif
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38
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39 #include <string>
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40
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41 #include "dMatrix.h"
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42 #include "file-stat.h"
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43 #include "oct-env.h"
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44
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45 #include "build-env.h"
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46 #include "builtin-defun-decls.h"
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47 #include "defun-dld.h"
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48 #include "error.h"
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49 #include "graphics.h"
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50 #include "interpreter-private.h"
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51 #include "interpreter.h"
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52 #include "ov.h"
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53 #include "ovl.h"
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54 #include "parse.h"
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55 #include "utils.h"
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56 #include "variables.h"
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57
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58 // PKG_ADD: if (__have_gnuplot__ ()) register_graphics_toolkit ("gnuplot"); endif
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59
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60 class gnuplot_graphics_toolkit : public octave::base_graphics_toolkit
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61 {
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62 public:
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63 gnuplot_graphics_toolkit (octave::interpreter& interp)
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64 : octave::base_graphics_toolkit ("gnuplot"), m_interpreter (interp) { }
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65
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66 ~gnuplot_graphics_toolkit (void) = default;
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67
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68 bool is_valid (void) const { return true; }
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69
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70 bool initialize (const graphics_object& go)
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71 {
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72 return go.isa ("figure");
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73 }
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74
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75 void finalize (const graphics_object& go)
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76 {
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77 if (go.isa ("figure"))
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78 {
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79 const figure::properties& props
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80 = dynamic_cast<const figure::properties&> (go.get_properties ());
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81
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82 send_quit (props.get___plot_stream__ ());
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83 }
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84 }
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85
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86 void update (const graphics_object& go, int id)
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87 {
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88 if (go.isa ("figure"))
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89 {
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90 graphics_object obj (go);
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91
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92 figure::properties& props
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93 = dynamic_cast<figure::properties&> (obj.get_properties ());
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94
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95 switch (id)
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96 {
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97 case base_properties::ID_VISIBLE:
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98 if (! props.is_visible ())
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99 {
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100 send_quit (props.get___plot_stream__ ());
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101 props.set___plot_stream__ (Matrix ());
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102 props.set_graphicssmoothing (false);
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103 }
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104 break;
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105 }
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106 }
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107 }
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108
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109 void redraw_figure (const graphics_object& go) const
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110 {
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111 static bool drawnow_executing = false;
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112
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113 // Prevent recursion
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114 if (! drawnow_executing)
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115 {
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116 octave::unwind_protect_var<bool> restore_var (drawnow_executing, true);
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117
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118 octave_value_list args;
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119 args(0) = go.get_handle ().as_octave_value ();
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120 octave::feval ("__gnuplot_drawnow__", args);
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121 }
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122 }
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123
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124 void print_figure (const graphics_object& go, const std::string& term,
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125 const std::string& file,
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126 const std::string& debug_file) const
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127 {
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128 octave_value_list args;
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129 if (! debug_file.empty ())
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130 args(3) = debug_file;
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131 args(2) = file;
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132 args(1) = term;
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133 args(0) = go.get_handle ().as_octave_value ();
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134 octave::feval ("__gnuplot_drawnow__", args);
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135 }
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136
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137 Matrix get_canvas_size (const graphics_handle&) const
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138 {
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139 Matrix sz (1, 2, 0.0);
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140 return sz;
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141 }
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142
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143 double get_screen_resolution (void) const
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144 { return 72.0; }
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145
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146 Matrix get_screen_size (void) const
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147 { return Matrix (1, 2, 0.0); }
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148
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149 void close (void)
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150 {
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151 if (m_interpreter.mislocked ("__init_gnuplot__"))
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152 m_interpreter.munlock ("__init_gnuplot__");
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153 }
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154
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155 private:
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156
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157 void send_quit (const octave_value& pstream) const
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158 {
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159 if (! pstream.isempty ())
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160 {
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161 octave_value_list args;
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162 Matrix fids = pstream.matrix_value ();
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163
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164 Ffputs (m_interpreter, ovl (fids(0), "\nquit;\n"));
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165
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166 Ffflush (m_interpreter, ovl (fids(0)));
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167 Fpclose (m_interpreter, ovl (fids(0)));
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168
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169 if (fids.numel () > 1)
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170 {
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171 Fpclose (m_interpreter, ovl (fids(1)));
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172
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173 if (fids.numel () > 2)
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174 Fwaitpid (ovl (fids(2)));
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175 }
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176 }
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177 }
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178
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179 octave::interpreter& m_interpreter;
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180 };
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181
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182 static bool
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183 have_gnuplot_binary (void)
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184 {
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185 const std::string exeext = octave::build_env::EXEEXT;
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186 const std::string path = octave::sys::env::getenv ("PATH");
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187 bool retval = false;
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188
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189 try
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190 {
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191 octave_value_list tmp
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192 = octave::feval ("gnuplot_binary", octave_value_list ());
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193
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194 if (tmp(0).is_string () && ! tmp(0).isempty ())
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195 {
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196 std::string gnuplot_binary = tmp(0).string_value ();
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197
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198 string_vector args (gnuplot_binary);
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199 std::string gnuplot_path = octave::search_path_for_file (path, args);
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200
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201 octave::sys::file_stat fs (gnuplot_path);
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202
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203 if (! fs.exists () && ! exeext.empty ())
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204 {
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205 args[0] += exeext;
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206
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207 gnuplot_path = octave::search_path_for_file (path, args);
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208
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209 fs = octave::sys::file_stat (gnuplot_path);
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210 }
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211
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212 retval = fs.exists ();
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213 }
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214 }
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215 catch (const octave::execution_exception&)
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216 {
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217 octave::interpreter& interp
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218 = octave::__get_interpreter__ ("have_gnuplot_binary");
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219
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220 interp.recover_from_exception ();
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221 }
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222
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223 return retval;
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224 }
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225
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226 // Initialize the gnuplot graphics toolkit.
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227
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228 DEFMETHOD_DLD (__init_gnuplot__, interp, , ,
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229 doc: /* -*- texinfo -*-
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230 @deftypefn {} {} __init_gnuplot__ ()
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231 Undocumented internal function.
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232 @end deftypefn */)
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233 {
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234 if (! have_gnuplot_binary ())
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235 error ("__init_gnuplot__: the gnuplot program is not available, see 'gnuplot_binary'");
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236 else if (! interp.mislocked ("__init_gnuplot__"))
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237 {
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238 octave::gtk_manager& gtk_mgr = interp.get_gtk_manager ();
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239
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240 octave::graphics_toolkit tk (new gnuplot_graphics_toolkit (interp));
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241 gtk_mgr.load_toolkit (tk);
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242
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243 interp.mlock ();
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244 }
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245
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246 return octave_value_list ();
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247 }
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248
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249 DEFUN_DLD (__have_gnuplot__, , ,
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250 doc: /* -*- texinfo -*-
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251 @deftypefn {} {@var{gnuplot_available} =} __have_gnuplot__ ()
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252 Undocumented internal function.
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253 @end deftypefn */)
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254 {
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255 return ovl (have_gnuplot_binary ());
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256 }
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257
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258 /*
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259 ## No test needed for internal helper function.
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260 %!assert (1)
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261 */