annotate libinterp/dldfcn/fftw.cc @ 20614:10ec79b47808

use new string_value method to handle value extraction errors * __voronoi__.cc, chol.cc, colamd.cc, fftw.cc: Use new string_value method.
author John W. Eaton <jwe@octave.org>
date Thu, 08 Oct 2015 18:15:56 -0400
parents f90c8372b7ba
children
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1 /*
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2
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3 Copyright (C) 2006-2015 David Bateman
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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 #ifdef HAVE_CONFIG_H
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24 #include <config.h>
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25 #endif
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26
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27 #include <algorithm>
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28
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29 #include "oct-fftw.h"
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30
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31 #include "defun-dld.h"
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32 #include "error.h"
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33 #include "ov.h"
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34
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35 #include "gripes.h"
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36
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37 DEFUN_DLD (fftw, args, ,
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38 "-*- texinfo -*-\n\
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39 @deftypefn {Loadable Function} {@var{method} =} fftw (\"planner\")\n\
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40 @deftypefnx {Loadable Function} {} fftw (\"planner\", @var{method})\n\
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41 @deftypefnx {Loadable Function} {@var{wisdom} =} fftw (\"dwisdom\")\n\
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42 @deftypefnx {Loadable Function} {} fftw (\"dwisdom\", @var{wisdom})\n\
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43 @deftypefnx {Loadable Function} {} fftw (\"threads\", @var{nthreads})\n\
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44 @deftypefnx {Loadable Function} {@var{nthreads} =} fftw (\"threads\")\n\
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45 \n\
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46 Manage @sc{fftw} wisdom data.\n\
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47 \n\
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48 Wisdom data can be used to significantly accelerate the calculation of the\n\
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49 FFTs, but implies an initial cost in its calculation. When the @sc{fftw}\n\
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50 libraries are initialized, they read a system wide wisdom file (typically in\n\
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51 @file{/etc/fftw/wisdom}), allowing wisdom to be shared between applications\n\
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52 other than Octave. Alternatively, the @code{fftw} function can be used to\n\
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53 import wisdom. For example,\n\
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54 \n\
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55 @example\n\
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56 @var{wisdom} = fftw (\"dwisdom\")\n\
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57 @end example\n\
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58 \n\
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59 @noindent\n\
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60 will save the existing wisdom used by Octave to the string @var{wisdom}.\n\
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61 This string can then be saved to a file and restored using the @code{save}\n\
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62 and @code{load} commands respectively. This existing wisdom can be\n\
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63 re-imported as follows\n\
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64 \n\
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65 @example\n\
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66 fftw (\"dwisdom\", @var{wisdom})\n\
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67 @end example\n\
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68 \n\
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69 If @var{wisdom} is an empty string, then the wisdom used is cleared.\n\
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70 \n\
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71 During the calculation of Fourier transforms further wisdom is generated.\n\
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72 The fashion in which this wisdom is generated is also controlled by\n\
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73 the @code{fftw} function. There are five different manners in which the\n\
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74 wisdom can be treated:\n\
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75 \n\
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76 @table @asis\n\
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77 @item @qcode{\"estimate\"}\n\
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78 Specifies that no run-time measurement of the optimal means of\n\
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79 calculating a particular is performed, and a simple heuristic is used\n\
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80 to pick a (probably sub-optimal) plan. The advantage of this method is\n\
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81 that there is little or no overhead in the generation of the plan, which\n\
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82 is appropriate for a Fourier transform that will be calculated once.\n\
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83 \n\
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84 @item @qcode{\"measure\"}\n\
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85 In this case a range of algorithms to perform the transform is considered\n\
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86 and the best is selected based on their execution time.\n\
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87 \n\
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88 @item @qcode{\"patient\"}\n\
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89 Similar to @qcode{\"measure\"}, but a wider range of algorithms is\n\
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90 considered.\n\
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91 \n\
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92 @item @qcode{\"exhaustive\"}\n\
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93 Like @qcode{\"measure\"}, but all possible algorithms that may be used to\n\
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94 treat the transform are considered.\n\
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95 \n\
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96 @item @qcode{\"hybrid\"}\n\
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97 As run-time measurement of the algorithm can be expensive, this is a\n\
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98 compromise where @qcode{\"measure\"} is used for transforms up to the size\n\
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99 of 8192 and beyond that the @qcode{\"estimate\"} method is used.\n\
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100 @end table\n\
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101 \n\
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102 The default method is @qcode{\"estimate\"}. The current method can\n\
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103 be queried with\n\
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104 \n\
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105 @example\n\
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106 @var{method} = fftw (\"planner\")\n\
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107 @end example\n\
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108 \n\
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109 @noindent\n\
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110 or set by using\n\
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111 \n\
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112 @example\n\
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113 fftw (\"planner\", @var{method})\n\
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114 @end example\n\
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115 \n\
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116 Note that calculated wisdom will be lost when restarting Octave. However,\n\
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117 the wisdom data can be reloaded if it is saved to a file as described\n\
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118 above. Saved wisdom files should not be used on different platforms since\n\
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119 they will not be efficient and the point of calculating the wisdom is lost.\n\
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120 \n\
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121 The number of threads used for computing the plans and executing the\n\
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122 transforms can be set with\n\
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123 \n\
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124 @example\n\
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125 fftw (\"threads\", @var{NTHREADS})\n\
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126 @end example\n\
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127 \n\
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128 Note that octave must be compiled with multi-threaded @sc{fftw} support for\n\
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129 this feature. The number of processors available to the current process is\n\
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130 used per default.\n\
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131 \n\
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132 @seealso{fft, ifft, fft2, ifft2, fftn, ifftn}\n\
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133 @end deftypefn")
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134 {
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135 octave_value retval;
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136
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460a3c6d8bf1 maint: Use Octave coding convention for cuddled parenthis in function calls with empty argument lists.
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137 int nargin = args.length ();
6228
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138
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139 if (nargin < 1 || nargin > 2)
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140 {
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141 print_usage ();
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142 return retval;
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143 }
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144
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0ce82753dd72 more configure changes for libraries
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diff changeset
145 #if defined (HAVE_FFTW)
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146 std::string arg0 = args(0).string_value ("fftw: first argument must be a string");
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147
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148 if (arg0 == "planner")
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149 {
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150 if (nargin == 2) //planner setter
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151 {
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152 // Use STL function to convert to lower case
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153 std::transform (arg0.begin (), arg0.end (), arg0.begin (),
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154 tolower);
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155
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156 std::string arg1 = args(1).string_value ("fftw: planner expects a string value as METHOD");
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67f2c76f9f4d Remove unnecessary checking of error_state after is_string validation.
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157
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158 std::transform (arg1.begin (), arg1.end (),
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159 arg1.begin (), tolower);
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160 octave_fftw_planner::FftwMethod meth
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161 = octave_fftw_planner::UNKNOWN;
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162 octave_float_fftw_planner::FftwMethod methf
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163 = octave_float_fftw_planner::UNKNOWN;
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164
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165 if (arg1 == "estimate")
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166 {
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167 meth = octave_fftw_planner::ESTIMATE;
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168 methf = octave_float_fftw_planner::ESTIMATE;
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169 }
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170 else if (arg1 == "measure")
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171 {
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172 meth = octave_fftw_planner::MEASURE;
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173 methf = octave_float_fftw_planner::MEASURE;
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174 }
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175 else if (arg1 == "patient")
10154
40dfc0c99116 DLD-FUNCTIONS/*.cc: untabify
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176 {
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177 meth = octave_fftw_planner::PATIENT;
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178 methf = octave_float_fftw_planner::PATIENT;
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179 }
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180 else if (arg1 == "exhaustive")
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181 {
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182 meth = octave_fftw_planner::EXHAUSTIVE;
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183 methf = octave_float_fftw_planner::EXHAUSTIVE;
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184 }
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185 else if (arg1 == "hybrid")
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186 {
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187 meth = octave_fftw_planner::HYBRID;
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188 methf = octave_float_fftw_planner::HYBRID;
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189 }
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190 else
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191 error ("fftw: unrecognized planner METHOD");
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f90c8372b7ba eliminate many more simple uses of error_state
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192
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193 meth = octave_fftw_planner::method (meth);
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194 octave_float_fftw_planner::method (methf);
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195
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196 if (meth == octave_fftw_planner::MEASURE)
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197 retval = octave_value ("measure");
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198 else if (meth == octave_fftw_planner::PATIENT)
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199 retval = octave_value ("patient");
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200 else if (meth == octave_fftw_planner::EXHAUSTIVE)
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201 retval = octave_value ("exhaustive");
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202 else if (meth == octave_fftw_planner::HYBRID)
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203 retval = octave_value ("hybrid");
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204 else
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205 retval = octave_value ("estimate");
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206 }
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207 else //planner getter
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208 {
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209 octave_fftw_planner::FftwMethod meth =
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210 octave_fftw_planner::method ();
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67f2c76f9f4d Remove unnecessary checking of error_state after is_string validation.
Rik <rik@octave.org>
parents: 19731
diff changeset
211
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212 if (meth == octave_fftw_planner::MEASURE)
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diff changeset
213 retval = octave_value ("measure");
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214 else if (meth == octave_fftw_planner::PATIENT)
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215 retval = octave_value ("patient");
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216 else if (meth == octave_fftw_planner::EXHAUSTIVE)
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diff changeset
217 retval = octave_value ("exhaustive");
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218 else if (meth == octave_fftw_planner::HYBRID)
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219 retval = octave_value ("hybrid");
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220 else
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221 retval = octave_value ("estimate");
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222 }
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223 }
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224 else if (arg0 == "dwisdom")
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225 {
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226 if (nargin == 2) //dwisdom setter
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227 {
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228 // Use STL function to convert to lower case
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diff changeset
229 std::transform (arg0.begin (), arg0.end (), arg0.begin (),
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230 tolower);
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diff changeset
231
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diff changeset
232 std::string arg1 = args(1).string_value ("fftw: WISDOM must be a string");
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233
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diff changeset
234 char *str = fftw_export_wisdom_to_string ();
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235
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diff changeset
236 if (arg1.length () < 1)
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diff changeset
237 fftw_forget_wisdom ();
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diff changeset
238 else if (! fftw_import_wisdom_from_string (arg1.c_str ()))
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John W. Eaton <jwe@octave.org>
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diff changeset
239 error ("fftw: could not import supplied WISDOM");
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diff changeset
240
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diff changeset
241 retval = octave_value (std::string (str));
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diff changeset
242
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diff changeset
243 // FIXME: need to free string even if there is an
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diff changeset
244 // exception.
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John W. Eaton <jwe@octave.org>
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diff changeset
245 free (str);
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John W. Eaton <jwe@octave.org>
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diff changeset
246 }
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John W. Eaton <jwe@octave.org>
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diff changeset
247 else //dwisdom getter
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diff changeset
248 {
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diff changeset
249 char *str = fftw_export_wisdom_to_string ();
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diff changeset
250 retval = octave_value (std::string (str));
19777
67f2c76f9f4d Remove unnecessary checking of error_state after is_string validation.
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parents: 19731
diff changeset
251
20614
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diff changeset
252 // FIXME: need to free string even if there is an
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diff changeset
253 // exception.
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diff changeset
254 free (str);
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John W. Eaton <jwe@octave.org>
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diff changeset
255 }
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diff changeset
256 }
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diff changeset
257 else if (arg0 == "swisdom")
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diff changeset
258 {
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diff changeset
259 //swisdom uses fftwf_ functions (float), dwisdom fftw_ (real)
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diff changeset
260 if (nargin == 2) //swisdom setter
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diff changeset
261 {
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diff changeset
262 // Use STL function to convert to lower case
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diff changeset
263 std::transform (arg0.begin (), arg0.end (), arg0.begin (),
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diff changeset
264 tolower);
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265
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diff changeset
266 std::string arg1 = args(1).string_value ("fftw: WISDOM must be a string");
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diff changeset
267
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diff changeset
268 char *str = fftwf_export_wisdom_to_string ();
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diff changeset
269
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diff changeset
270 if (arg1.length () < 1)
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diff changeset
271 fftwf_forget_wisdom ();
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diff changeset
272 else if (! fftwf_import_wisdom_from_string (arg1.c_str ()))
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diff changeset
273 error ("fftw: could not import supplied WISDOM");
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274
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275 retval = octave_value (std::string (str));
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276
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277 // FIXME: need to free string even if there is an
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278 // exception.
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279 free (str);
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280 }
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281 else //swisdom getter
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282 {
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283 char *str = fftwf_export_wisdom_to_string ();
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284 retval = octave_value (std::string (str));
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285
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286 // FIXME: need to free string even if there is an
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287 // exception.
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288 free (str);
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289 }
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290 }
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291 else if (arg0 == "threads")
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292 {
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293 if (nargin == 2) //threads setter
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294 {
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295 if (args(1).is_real_scalar ())
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296 {
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297 int nthreads = args(1).int_value();
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298 if (nthreads >= 1)
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299 {
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300 #if defined (HAVE_FFTW3_THREADS)
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301 octave_fftw_planner::threads (nthreads);
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302 #else
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303 gripe_disabled_feature ("fftw", "multithreaded FFTW");
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304 #endif
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305 #if defined (HAVE_FFTW3F_THREADS)
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306 octave_float_fftw_planner::threads (nthreads);
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307 #else
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308 gripe_disabled_feature ("fftw", "multithreaded FFTW");
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309 #endif
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310 }
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311 else
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312 error ("fftw: number of threads must be >=1");
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313 }
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314 else
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315 error ("fftw: setting threads needs one integer argument");
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316 }
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317 else //threads getter
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318 #if defined (HAVE_FFTW3_THREADS)
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319 retval = octave_value (octave_fftw_planner::threads());
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320 #else
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321 retval = 1;
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322 #endif
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323 }
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324 else
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325 error ("fftw: unrecognized argument");
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326 #else
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327
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328 gripe_disabled_feature ("fftw", "the FFTW3 planner");
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329
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330 #endif
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331
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332 return retval;
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333 }
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334
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335 /*
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336 %!testif HAVE_FFTW
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337 %! def_method = fftw ("planner");
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338 %! unwind_protect
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339 %! method = "estimate";
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340 %! fftw ("planner", method);
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341 %! assert (fftw ("planner"), method);
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342 %! method = "measure";
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343 %! fftw ("planner", method);
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344 %! assert (fftw ("planner"), method);
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345 %! method = "patient";
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346 %! fftw ("planner", method);
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347 %! assert (fftw ("planner"), method);
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348 %! method = "exhaustive";
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349 %! fftw ("planner", method);
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350 %! assert (fftw ("planner"), method);
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351 %! method = "hybrid";
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352 %! fftw ("planner", method);
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353 %! assert (fftw ("planner"), method);
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354 %! unwind_protect_cleanup
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355 %! fftw ("planner", def_method);
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356 %! end_unwind_protect
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357
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358 %!testif HAVE_FFTW
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359 %! def_dwisdom = fftw ("dwisdom");
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360 %! def_swisdom = fftw ("swisdom");
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361 %! unwind_protect
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362 %! wisdom = fftw ("dwisdom");
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363 %! assert (ischar (wisdom));
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364 %! fftw ("dwisdom", wisdom);
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365 %! assert (fftw ("dwisdom"), wisdom);
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366 %! wisdom = fftw ("swisdom");
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367 %! assert (ischar (wisdom));
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368 %! fftw ("swisdom", wisdom);
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369 %! assert (fftw ("swisdom"), wisdom);
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370 %! unwind_protect_cleanup
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371 %! fftw ("dwisdom", def_dwisdom);
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372 %! fftw ("swisdom", def_swisdom);
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373 %! end_unwind_protect
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374
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375 %!testif HAVE_FFTW3_THREADS
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376 %! n = fftw ("threads");
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377 %! unwind_protect
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378 %! fftw ("threads", 3);
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379 %! assert (fftw ("threads"), 3);
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380 %! unwind_protect_cleanup
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381 %! fftw ("threads", n);
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382 %! end_unwind_protect
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383
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384 %!error <Invalid call to fftw> fftw ();
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385 %!error <Invalid call to fftw> fftw ("planner", "estimate", "measure");
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386 %!error fftw (3);
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387 %!error fftw ("invalid");
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388 %!error fftw ("planner", "invalid");
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389 %!error fftw ("planner", 2);
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390 %!error fftw ("dwisdom", "invalid");
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391 %!error fftw ("swisdom", "invalid");
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392 %!error fftw ("threads", "invalid");
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393 %!error fftw ("threads", -3);
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diff changeset
394 */