Mercurial > hg > octave-nkf

annotate scripts/plot/util/private/__gnuplot_get_var__.m @ 20410:d9f35ceff9e1

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Change mkfifo to use an octal argument for MODE (bug #45054). * NEWS: Announce switch from decimal to octal MODE for mkfifo. * file-io.cc (convert): Add a FIXME note that this function is repeated in * syscalls.cc. * syscalls.cc (convert): New function to convert from one base to another. * syscalls.cc (Fmkfifo): Change docstring to note that MODE argument is now octal. Convert MODE from octal to decimal before calling octave_mkfifo(). Add BIST tests. * __gnuplot_get_var__.m, __gnuplot_ginput__.m: Change instances of MODE argument in m-files from decimal to octal.
author Rik <rik@octave.org>
date Sun, 17 May 2015 10:04:08 -0700
parents 4197fc428c7d
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
19898
4197fc428c7d maint: Update copyright notices for 2015.
John W. Eaton <jwe@octave.org>
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1 ## Copyright (C) 2009-2015 Ben Abbott
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2 ##
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3 ## This file is part of Octave.
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4 ##
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5 ## Octave is free software; you can redistribute it and/or modify it
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6 ## under the terms of the GNU General Public License as published by
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7 ## the Free Software Foundation; either version 3 of the License, or (at
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8 ## your option) any later version.
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9 ##
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
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10 ## Octave is distributed in the hope that it will be useful, but
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11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 ## General Public License for more details.
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14 ##
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15 ## You should have received a copy of the GNU General Public License
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16 ## along with Octave; see the file COPYING. If not, see
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17 ## <http://www.gnu.org/licenses/>.
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18
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
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19 ## -*- texinfo -*-
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20 ## @deftypefn {Function File} {@var{value} =} __gnuplot_get_var__ (@var{h}, @var{name}, @var{fmt})
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21 ## Undocumented internal function.
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22 ## @end deftypefn
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23
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24 ## Author: Ben Abbott <bpabbott@mac.com>
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25 ## Created: 2009-02-07
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26
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27 function gp_var_value = __gnuplot_get_var__ (h, gp_var_name, fmt = "")
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28
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29 if (numel (h) == 1 && isfigure (h))
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30 if (isempty (get (h, "__plot_stream__")))
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31 ostream = __gnuplot_open_stream__ (2, h);
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32 else
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33 ostream = get (h, "__plot_stream__");
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34 endif
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35 else
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36 ostream = h;
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37 endif
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38 if (numel (ostream) < 1)
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39 error ("__gnuplot_get_var__: stream to gnuplot not open");
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40 elseif (ispc ())
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41 if (numel (ostream) == 1)
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42 error ("__gnuplot_get_var__: Need mkfifo that is not implemented under Windows");
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43 endif
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44 use_mkfifo = false;
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45 istream = ostream(2);
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46 ostream = ostream(1);
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47 else
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48 use_mkfifo = true;
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49 ostream = ostream(1);
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50 endif
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51
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52 if (use_mkfifo)
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53 gpin_name = tempname ();
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54
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55 [err, msg] = mkfifo (gpin_name, 600);
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56
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57 if (err)
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58 error ("__gnuplot_get_var__: Can not make FIFO (%s)", msg);
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59 endif
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60 endif
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61
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62 gp_var_name = strtrim (gp_var_name);
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63 n = min (strfind (gp_var_name, " "), strfind (gp_var_name, ",")) - 1;
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64 if (isempty (n))
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65 n = numel (gp_var_name);
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66 endif
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67
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68 unwind_protect
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69
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70 ## Notes: Variables may be undefined if user closes gnuplot by "q"
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71 ## or Alt-F4. Further, this abrupt close also requires the leading
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72 ## "\n" on the next line.
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73 if (use_mkfifo)
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74 fprintf (ostream, "\nset print \"%s\";\n", gpin_name);
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75 fflush (ostream);
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76 [gpin, err] = fopen (gpin_name, "r");
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77 if (err)
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78 ## Try a second time, and then give an error.
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79 [gpin, err] = fopen (gpin_name, "r");
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80 endif
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81 if (err)
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82 error ("__gnuplot_get_var__: can not open FIFO");
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83 endif
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84 gp_cmd = sprintf ("\nif (exists(\"%s\")) print %s; else print NaN\n",
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85 gp_var_name(1:n), gp_var_name);
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86 fputs (ostream, gp_cmd);
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87
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88 ## Close output file, to force it to be flushed
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89 fputs (ostream, "set print;\n");
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90 fflush (ostream);
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91
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92 ## Now read from fifo.
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93 reading = true;
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94 str = {};
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95 while (reading)
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96 str{end+1} = fgets (gpin);
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97 if (isnumeric (str{end}) && (str{end} == -1))
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98 reading = false;
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99 str = str(1:(end-1));
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100 endif
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101 endwhile
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102 str = strcat (str{:});
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103 fclose (gpin);
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104 else
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105 ## Direct gnuplot to print to <STDOUT>
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106 fprintf (ostream, "set print \"-\";\n");
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107 fflush (ostream);
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108 gp_cmd = sprintf ("\nif (exists(\"%s\")) print \"OCTAVE: \", %s; else print NaN\n",
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109 gp_var_name(1:n), gp_var_name);
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110 fputs (ostream, gp_cmd);
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111 fflush (ostream);
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112 ## Direct gnuplot to print to <STDERR>
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113 fputs (ostream, "set print;\n");
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114 fflush (ostream);
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115
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116 str = {};
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117 while (isempty (str))
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118 str = fread (istream, "*char")';
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119 if (isempty (str))
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120 sleep (0.05);
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121 else
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122 str = regexp (str, 'OCTAVE:.*', "match");
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123 str = str{end}(8:end);
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124 endif
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125 fclear (istream);
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
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126 endwhile
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
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127 endif
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
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128
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
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129 ## Strip out EOLs and the continuation character "|"
16108
3cce6b4e0f7c Update gnuplot plotting scripts for faster or more modern synta
Rik <rik@octave.org>
parents: 14138
diff changeset
130 str(str=="\n" | str=="\r") = "";
9001
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
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parents:
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131 n_continue = strfind (str, " \\ ");
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
diff changeset
132 if (! isempty (n_continue))
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
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133 str(n_continue+1) = "";
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
diff changeset
134 endif
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
diff changeset
135
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
diff changeset
136 if (isempty (fmt))
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
diff changeset
137 gp_var_value = strtrim (str);
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
diff changeset
138 else
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
diff changeset
139 gp_var_value = sscanf (str, fmt);
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
diff changeset
140 endif
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
diff changeset
141
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
diff changeset
142 unwind_protect_cleanup
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
diff changeset
143 if (use_mkfifo)
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
diff changeset
144 unlink (gpin_name);
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
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145 endif
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
diff changeset
146 end_unwind_protect
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
diff changeset
147
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
diff changeset
148 endfunction
b3268a0458f2 __gnuplot_get_var__.m: Add function to get gnuplot variables.
Ben Abbott <bpabbott@mac.com>
parents:
diff changeset
149