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Tidy up for ROLI
author Geogaddi\David <d.m.ronan@qmul.ac.uk>
date Tue, 17 May 2016 18:50:19 +0100
parents 636c989477e7
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1 <html lang="en">
2 <head>
3 <title>Wisdom Export - FFTW 3.2.1</title>
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12 <!--
13 This manual is for FFTW
14 (version 3.2.1, 5 February 2009).
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16 Copyright (C) 2003 Matteo Frigo.
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18 Copyright (C) 2003 Massachusetts Institute of Technology.
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48 <div class="node">
49 <p>
50 <a name="Wisdom-Export"></a>
51 Next:&nbsp;<a rel="next" accesskey="n" href="Wisdom-Import.html#Wisdom-Import">Wisdom Import</a>,
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54 <hr>
55 </div>
56
57 <h4 class="subsection">4.7.1 Wisdom Export</h4>
58
59 <pre class="example"> void fftw_export_wisdom_to_file(FILE *output_file);
60 char *fftw_export_wisdom_to_string(void);
61 void fftw_export_wisdom(void (*write_char)(char c, void *), void *data);
62 </pre>
63 <p><a name="index-fftw_005fexport_005fwisdom-270"></a><a name="index-fftw_005fexport_005fwisdom_005fto_005ffile-271"></a><a name="index-fftw_005fexport_005fwisdom_005fto_005fstring-272"></a>
64 These functions allow you to export all currently accumulated wisdom
65 in a form from which it can be later imported and restored, even
66 during a separate run of the program. (See <a href="Words-of-Wisdom_002dSaving-Plans.html#Words-of-Wisdom_002dSaving-Plans">Words of Wisdom-Saving Plans</a>.) The current store of wisdom is not affected by calling any
67 of these routines.
68
69 <p><code>fftw_export_wisdom</code> exports the wisdom to any output
70 medium, as specified by the callback function
71 <code>write_char</code>. <code>write_char</code> is a <code>putc</code>-like function that
72 writes the character <code>c</code> to some output; its second parameter is
73 the <code>data</code> pointer passed to <code>fftw_export_wisdom</code>. For
74 convenience, the following two &ldquo;wrapper&rdquo; routines are provided:
75
76 <p><code>fftw_export_wisdom_to_file</code> writes the wisdom to the
77 current position in <code>output_file</code>, which should be open with write
78 permission. Upon exit, the file remains open and is positioned at the
79 end of the wisdom data.
80
81 <p><code>fftw_export_wisdom_to_string</code> returns a pointer to a
82 <code>NULL</code>-terminated string holding the wisdom data. This string is
83 dynamically allocated, and it is the responsibility of the caller to
84 deallocate it with <code>free</code> when it is no longer needed.
85
86 <p>All of these routines export the wisdom in the same format, which we
87 will not document here except to say that it is LISP-like ASCII text
88 that is insensitive to white space.
89
90 <!-- =========> -->
91 </body></html>
92