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authordoko@ubuntu.com <doko@ubuntu.com>2014-04-17 16:46:53 (GMT)
committerdoko@ubuntu.com <doko@ubuntu.com>2014-04-17 16:46:53 (GMT)
commit72f61de768dc17ad528e1b3c01a87998eff22cac (patch)
tree14714ddf39589ce23245cd394e889c3a54c9d14e /Python/frozenmain.c
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- fix merge conflict
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  <div class="summary">
<a href="#groups">Topics</a> &#124;
<a href="#func-members">Functions</a>  </div>
  <div class="headertitle"><div class="title">Object Creation Properties<div class="ingroups"><a class="el" href="group___h5_p.html">Property Lists (H5P)</a></div></div></div>
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<caption border="1" style="background-color:whitesmoke;">Object creation property list functions (H5P)</caption>
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<th>Function </th><th>Purpose  </th></tr>
<tr>
<td><a class="el" href="#gade132fded1df87300a4c7175c6bd766a" title="Sets tracking and indexing of attribute creation order.">H5Pset_attr_creation_order</a>/<a class="el" href="#ga2a54d1ff8d7a0d0e8d652f373c18bc37" title="Retrieves tracking and indexing settings for attribute creation order.">H5Pget_attr_creation_order</a> </td><td>Sets/gets tracking and indexing of attribute creation order.  </td></tr>
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<td><a class="el" href="#ga0115b13dcbd8770cbdcef3db2ac12ea1" title="Sets attribute storage phase change thresholds.">H5Pset_attr_phase_change</a>/<a class="el" href="#gaf7c57a6e78a4123f82450559623ab534" title="Retrieves attribute storage phase change thresholds.">H5Pget_attr_phase_change</a> </td><td>Sets/gets attribute storage phase change thresholds  </td></tr>
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<td><a class="el" href="#ga191c567ee50b2063979cdef156a768c5" title="Adds a filter to the filter pipeline.">H5Pset_filter</a>/<a class="el" href="_h5version_8h.html#a7e070dfec9cb3a3aaf9c188a987e6a15">H5Pget_filter</a> </td><td>Adds/gets a filter to/from the filter pipeline.  </td></tr>
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<td><a class="el" href="_h5version_8h.html#ac7aa336e7b1b9033cea2448ba623951f">H5Pget_filter_by_id</a> </td><td>Returns information about a filter in a pipeline.  </td></tr>
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<td><a class="el" href="#gacbad1ca36a61246b439a25f28e7575fb" title="Returns the number of filters in the pipeline.">H5Pget_nfilters</a> </td><td>Returns information about the specified filter.  </td></tr>
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<td><a class="el" href="#gafa87fab7ebb6c4a8da9a75a86cc62fa3" title="Sets the recording of times associated with an object.">H5Pset_obj_track_times</a>/<a class="el" href="#gad99400915d340da978dd6ac5676122c6" title="Determines whether times associated with an object are being recorded.">H5Pget_obj_track_times</a> </td><td>Sets/gets the recording of times associated with an object.  </td></tr>
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<td><a class="el" href="#ga12a358b3725a889c1768bbd2b5f541d8" title="Modifies a filter in the filter pipeline.">H5Pmodify_filter</a> </td><td>Modifies a filter in the filter pipeline.  </td></tr>
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<td><a class="el" href="#ga8bc81abfbd0393b0a46e121f817a3f81" title="Sets up use of the Fletcher32 checksum filter.">H5Pset_fletcher32</a> </td><td>Sets up use of the Fletcher32 checksum filter.  </td></tr>
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Topics</h2></td></tr>
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<tr class="separator:"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:group___t_c_p_l" id="r_group___t_c_p_l"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___t_c_p_l.html">Datatype Creation Properties</a></td></tr>
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<tr class="memitem:group___g_c_p_l" id="r_group___g_c_p_l"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="group___g_c_p_l.html">Group Creation Properties</a></td></tr>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga2a54d1ff8d7a0d0e8d652f373c18bc37" id="r_ga2a54d1ff8d7a0d0e8d652f373c18bc37"><td class="memItemLeft" align="right" valign="top"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga2a54d1ff8d7a0d0e8d652f373c18bc37">H5Pget_attr_creation_order</a> (<a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a> plist_id, unsigned *crt_order_flags)</td></tr>
<tr class="memdesc:ga2a54d1ff8d7a0d0e8d652f373c18bc37"><td class="mdescLeft">&#160;</td><td class="mdescRight">Retrieves tracking and indexing settings for attribute creation order.  <br /></td></tr>
<tr class="separator:ga2a54d1ff8d7a0d0e8d652f373c18bc37"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:gaf7c57a6e78a4123f82450559623ab534" id="r_gaf7c57a6e78a4123f82450559623ab534"><td class="memItemLeft" align="right" valign="top"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gaf7c57a6e78a4123f82450559623ab534">H5Pget_attr_phase_change</a> (<a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a> plist_id, unsigned *max_compact, unsigned *min_dense)</td></tr>
<tr class="memdesc:gaf7c57a6e78a4123f82450559623ab534"><td class="mdescLeft">&#160;</td><td class="mdescRight">Retrieves attribute storage phase change thresholds.  <br /></td></tr>
<tr class="separator:gaf7c57a6e78a4123f82450559623ab534"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga024d200a6a07e12f008a62c4e62d0bcc" id="r_ga024d200a6a07e12f008a62c4e62d0bcc"><td class="memItemLeft" align="right" valign="top"><a class="el" href="_h5_zpublic_8h.html#afae8461c70d47e63be2163af23362237">H5Z_filter_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga024d200a6a07e12f008a62c4e62d0bcc">H5Pget_filter2</a> (<a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a> plist_id, unsigned idx, unsigned int *flags, size_t *cd_nelmts, unsigned cd_values[], size_t namelen, char name[], unsigned *filter_config)</td></tr>
<tr class="memdesc:ga024d200a6a07e12f008a62c4e62d0bcc"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns information about a filter in a pipeline.  <br /></td></tr>
<tr class="separator:ga024d200a6a07e12f008a62c4e62d0bcc"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ga2d5e9df5f0e93abae11ee5edd82fcec3" id="r_ga2d5e9df5f0e93abae11ee5edd82fcec3"><td class="memItemLeft" align="right" valign="top"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga2d5e9df5f0e93abae11ee5edd82fcec3">H5Pget_filter_by_id2</a> (<a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a> plist_id, <a class="el" href="_h5_zpublic_8h.html#afae8461c70d47e63be2163af23362237">H5Z_filter_t</a> filter_id, unsigned int *flags, size_t *cd_nelmts, unsigned cd_values[], size_t namelen, char name[], unsigned *filter_config)</td></tr>
<tr class="memdesc:ga2d5e9df5f0e93abae11ee5edd82fcec3"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns information about the specified filter.  <br /></td></tr>
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<tr class="memitem:gacbad1ca36a61246b439a25f28e7575fb" id="r_gacbad1ca36a61246b439a25f28e7575fb"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gacbad1ca36a61246b439a25f28e7575fb">H5Pget_nfilters</a> (<a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a> plist_id)</td></tr>
<tr class="memdesc:gacbad1ca36a61246b439a25f28e7575fb"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the number of filters in the pipeline.  <br /></td></tr>
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<tr class="memitem:gad99400915d340da978dd6ac5676122c6" id="r_gad99400915d340da978dd6ac5676122c6"><td class="memItemLeft" align="right" valign="top"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gad99400915d340da978dd6ac5676122c6">H5Pget_obj_track_times</a> (<a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a> plist_id, <a class="el" href="_h5public_8h.html#ad470b00eccd2115c707c02de5fa1120d">hbool_t</a> *track_times)</td></tr>
<tr class="memdesc:gad99400915d340da978dd6ac5676122c6"><td class="mdescLeft">&#160;</td><td class="mdescRight">Determines whether times associated with an object are being recorded.  <br /></td></tr>
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<tr class="memitem:ga12a358b3725a889c1768bbd2b5f541d8" id="r_ga12a358b3725a889c1768bbd2b5f541d8"><td class="memItemLeft" align="right" valign="top"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga12a358b3725a889c1768bbd2b5f541d8">H5Pmodify_filter</a> (<a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a> plist_id, <a class="el" href="_h5_zpublic_8h.html#afae8461c70d47e63be2163af23362237">H5Z_filter_t</a> filter, unsigned int flags, size_t cd_nelmts, const unsigned int cd_values[])</td></tr>
<tr class="memdesc:ga12a358b3725a889c1768bbd2b5f541d8"><td class="mdescLeft">&#160;</td><td class="mdescRight">Modifies a filter in the filter pipeline.  <br /></td></tr>
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<tr class="memitem:gabffbf6d013c090fa052ac4bafce8e532" id="r_gabffbf6d013c090fa052ac4bafce8e532"><td class="memItemLeft" align="right" valign="top"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gabffbf6d013c090fa052ac4bafce8e532">H5Premove_filter</a> (<a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a> plist_id, <a class="el" href="_h5_zpublic_8h.html#afae8461c70d47e63be2163af23362237">H5Z_filter_t</a> filter)</td></tr>
<tr class="memdesc:gabffbf6d013c090fa052ac4bafce8e532"><td class="mdescLeft">&#160;</td><td class="mdescRight">Delete one or more filters in the filter pipeline.  <br /></td></tr>
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<tr class="memitem:gade132fded1df87300a4c7175c6bd766a" id="r_gade132fded1df87300a4c7175c6bd766a"><td class="memItemLeft" align="right" valign="top"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gade132fded1df87300a4c7175c6bd766a">H5Pset_attr_creation_order</a> (<a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a> plist_id, unsigned crt_order_flags)</td></tr>
<tr class="memdesc:gade132fded1df87300a4c7175c6bd766a"><td class="mdescLeft">&#160;</td><td class="mdescRight">Sets tracking and indexing of attribute creation order.  <br /></td></tr>
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<tr class="memitem:ga0115b13dcbd8770cbdcef3db2ac12ea1" id="r_ga0115b13dcbd8770cbdcef3db2ac12ea1"><td class="memItemLeft" align="right" valign="top"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga0115b13dcbd8770cbdcef3db2ac12ea1">H5Pset_attr_phase_change</a> (<a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a> plist_id, unsigned max_compact, unsigned min_dense)</td></tr>
<tr class="memdesc:ga0115b13dcbd8770cbdcef3db2ac12ea1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Sets attribute storage phase change thresholds.  <br /></td></tr>
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<tr class="memitem:ga191c567ee50b2063979cdef156a768c5" id="r_ga191c567ee50b2063979cdef156a768c5"><td class="memItemLeft" align="right" valign="top"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga191c567ee50b2063979cdef156a768c5">H5Pset_filter</a> (<a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a> plist_id, <a class="el" href="_h5_zpublic_8h.html#afae8461c70d47e63be2163af23362237">H5Z_filter_t</a> filter, unsigned int flags, size_t cd_nelmts, const unsigned int c_values[])</td></tr>
<tr class="memdesc:ga191c567ee50b2063979cdef156a768c5"><td class="mdescLeft">&#160;</td><td class="mdescRight">Adds a filter to the filter pipeline.  <br /></td></tr>
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<tr class="memitem:ga8bc81abfbd0393b0a46e121f817a3f81" id="r_ga8bc81abfbd0393b0a46e121f817a3f81"><td class="memItemLeft" align="right" valign="top"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ga8bc81abfbd0393b0a46e121f817a3f81">H5Pset_fletcher32</a> (<a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a> plist_id)</td></tr>
<tr class="memdesc:ga8bc81abfbd0393b0a46e121f817a3f81"><td class="mdescLeft">&#160;</td><td class="mdescRight">Sets up use of the Fletcher32 checksum filter.  <br /></td></tr>
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<tr class="memitem:gafa87fab7ebb6c4a8da9a75a86cc62fa3" id="r_gafa87fab7ebb6c4a8da9a75a86cc62fa3"><td class="memItemLeft" align="right" valign="top"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#gafa87fab7ebb6c4a8da9a75a86cc62fa3">H5Pset_obj_track_times</a> (<a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a> plist_id, <a class="el" href="_h5public_8h.html#ad470b00eccd2115c707c02de5fa1120d">hbool_t</a> track_times)</td></tr>
<tr class="memdesc:gafa87fab7ebb6c4a8da9a75a86cc62fa3"><td class="mdescLeft">&#160;</td><td class="mdescRight">Sets the recording of times associated with an object.  <br /></td></tr>
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<h2 class="groupheader">Function Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#ga2a54d1ff8d7a0d0e8d652f373c18bc37">&#9670;&#160;</a></span>H5Pget_attr_creation_order()</h2>

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          <td class="memname"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a> H5Pget_attr_creation_order </td>
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          <td class="paramtype"><a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a></td>          <td class="paramname"><span class="paramname"><em>plist_id</em>, </span></td>
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          <td class="paramtype">unsigned *</td>          <td class="paramname"><span class="paramname"><em>crt_order_flags</em></span>&#160;)</td>
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<p>Retrieves tracking and indexing settings for attribute creation order. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">plist_id</td><td>Property list identifier </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">crt_order_flags</td><td>Flags specifying whether to track and index attribute creation order</td></tr>
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<dl class="section return"><dt>Returns</dt><dd>Returns a non-negative value if successful; otherwise, returns a negative value.</dd></dl>
<p><a class="el" href="#ga2a54d1ff8d7a0d0e8d652f373c18bc37" title="Retrieves tracking and indexing settings for attribute creation order.">H5Pget_attr_creation_order()</a> retrieves the settings for tracking and indexing attribute creation order on an object.</p>
<p><code>plist_id</code> is an object creation property list (<code>ocpl</code>), as it can be a dataset or group creation property list identifier. The term <code>ocpl</code> is used when different types of objects may be involved.</p>
<p><code>crt_order_flags</code> returns flags with the following meanings:</p>
<table class="doxtable">
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<td><a class="el" href="_h5_ppublic_8h.html#aa52f444ce2ba8bc5a062612f195e899f">H5P_CRT_ORDER_TRACKED</a> </td><td>Attribute creation order is tracked but not necessarily indexed.  </td></tr>
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<td><a class="el" href="_h5_ppublic_8h.html#adfd355619b7da5792a16d7bc491f963d">H5P_CRT_ORDER_INDEXED</a>  </td><td>Attribute creation order is indexed (requires <a class="el" href="_h5_ppublic_8h.html#aa52f444ce2ba8bc5a062612f195e899f">H5P_CRT_ORDER_TRACKED</a>).  </td></tr>
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<p>If <code>crt_order_flags</code> is returned with a value of 0 (zero), attribute creation order is neither tracked nor indexed.</p>
<dl class="section since"><dt>Since</dt><dd>1.8.0 </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#gaf7c57a6e78a4123f82450559623ab534">&#9670;&#160;</a></span>H5Pget_attr_phase_change()</h2>

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          <td class="memname"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a> H5Pget_attr_phase_change </td>
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          <td class="paramtype"><a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a></td>          <td class="paramname"><span class="paramname"><em>plist_id</em>, </span></td>
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          <td class="paramtype">unsigned *</td>          <td class="paramname"><span class="paramname"><em>max_compact</em>, </span></td>
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          <td class="paramtype">unsigned *</td>          <td class="paramname"><span class="paramname"><em>min_dense</em></span>&#160;)</td>
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<p>Retrieves attribute storage phase change thresholds. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">plist_id</td><td>Property list identifier </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">max_compact</td><td>Maximum number of attributes to be stored in compact storage (Default: 8) </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">min_dense</td><td>Minimum number of attributes to be stored in dense storage (Default: 6)</td></tr>
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<dl class="section return"><dt>Returns</dt><dd>Returns a non-negative value if successful; otherwise, returns a negative value.</dd></dl>
<p><a class="el" href="#gaf7c57a6e78a4123f82450559623ab534" title="Retrieves attribute storage phase change thresholds.">H5Pget_attr_phase_change()</a> retrieves threshold values for attribute storage on an object. These thresholds determine the point at which attribute storage changes from compact storage (i.e., storage in the object header) to dense storage (i.e., storage in a heap and indexed with a B-tree).</p>
<p>In the general case, attributes are initially kept in compact storage. When the number of attributes exceeds <code>max_compact</code>, attribute storage switches to dense storage. If the number of attributes subsequently falls below <code>min_dense</code>, the attributes are returned to compact storage.</p>
<p>If <code>max_compact</code> is set to 0 (zero), dense storage always used.</p>
<p><code>plist_id</code> is an object creation property list (<code>ocpl</code>), as it can be a dataset or group creation property list identifier. The term <code>ocpl</code> is used when different types of objects may be involved.</p>
<dl class="section since"><dt>Since</dt><dd>1.8.0 </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga024d200a6a07e12f008a62c4e62d0bcc">&#9670;&#160;</a></span>H5Pget_filter2()</h2>

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          <td class="memname"><a class="el" href="_h5_zpublic_8h.html#afae8461c70d47e63be2163af23362237">H5Z_filter_t</a> H5Pget_filter2 </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a></td>          <td class="paramname"><span class="paramname"><em>plist_id</em>, </span></td>
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          <td class="paramkey"></td>
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          <td class="paramtype">unsigned</td>          <td class="paramname"><span class="paramname"><em>idx</em>, </span></td>
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          <td class="paramtype">unsigned int *</td>          <td class="paramname"><span class="paramname"><em>flags</em>, </span></td>
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          <td class="paramtype">size_t *</td>          <td class="paramname"><span class="paramname"><em>cd_nelmts</em>, </span></td>
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          <td class="paramtype">unsigned</td>          <td class="paramname"><span class="paramname"><em>cd_values</em>[], </span></td>
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          <td class="paramtype">size_t</td>          <td class="paramname"><span class="paramname"><em>namelen</em>, </span></td>
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          <td class="paramtype">char</td>          <td class="paramname"><span class="paramname"><em>name</em>[], </span></td>
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          <td class="paramtype">unsigned *</td>          <td class="paramname"><span class="paramname"><em>filter_config</em></span>&#160;)</td>
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<p>Returns information about a filter in a pipeline. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">plist_id</td><td>Object creation property list identifier </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">idx</td><td>Sequence number within the filter pipeline of the filter for which information is sought </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">flags</td><td>Bit vector specifying certain general properties of the filter </td></tr>
    <tr><td class="paramdir">[in,out]</td><td class="paramname">cd_nelmts</td><td>Number of elements in <code>cd_values</code> </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">cd_values</td><td>Auxiliary data for the filter </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">namelen</td><td>Anticipated number of characters in <code>name</code> </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">name</td><td>Name of the filter </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">filter_config</td><td>Bit field, as described in <a class="el" href="group___h5_z.html#ga9ef800ceec249c8819492545def9adba" title="Retrieves information about a filter.">H5Zget_filter_info()</a></td></tr>
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<dl class="section return"><dt>Returns</dt><dd>Returns a negative value on failure, and the filter identifier if successful (see <a class="el" href="_h5_zpublic_8h.html#afae8461c70d47e63be2163af23362237" title="Filter identifiers.">H5Z_filter_t</a>):<ul>
<li><a class="el" href="_h5_zpublic_8h.html#a9e802e9612b3647e7d3ffe4ce3b8dcce">H5Z_FILTER_DEFLATE</a> Data compression filter, employing the gzip algorithm</li>
<li><a class="el" href="_h5_zpublic_8h.html#aa723f1a71601bf22c95620a490ecf1af">H5Z_FILTER_SHUFFLE</a> Data shuffling filter</li>
<li><a class="el" href="_h5_zpublic_8h.html#a59ca894c9c2b99b1614b0c46a7407f1c">H5Z_FILTER_FLETCHER32</a> Error detection filter, employing the Fletcher32 checksum algorithm</li>
<li><a class="el" href="_h5_zpublic_8h.html#a421d9941c68ebb776573baeb9aa77cd2">H5Z_FILTER_SZIP</a> Data compression filter, employing the SZIP algorithm</li>
<li><a class="el" href="_h5_zpublic_8h.html#a8cc463fa1979bd4bfa0dd9aa6a41e49d">H5Z_FILTER_NBIT</a> Data compression filter, employing the N-bit algorithm</li>
<li><p class="startli"><a class="el" href="_h5_zpublic_8h.html#a745d2ccb4f7712ed78ef5e562e27d2ca">H5Z_FILTER_SCALEOFFSET</a> Data compression filter, employing the scale-offset algorithm</p>
<p class="startli"><a class="el" href="#ga024d200a6a07e12f008a62c4e62d0bcc" title="Returns information about a filter in a pipeline.">H5Pget_filter2()</a> returns information about a filter specified by its filter number, in a filter pipeline specified by the property list with which it is associated.</p>
<p class="startli"><code>plist_id</code> must be a dataset or group creation property list.</p>
<p class="startli"><code>idx</code> is a value between zero and N-1, as described in <a class="el" href="#gacbad1ca36a61246b439a25f28e7575fb" title="Returns the number of filters in the pipeline.">H5Pget_nfilters()</a>. The function will return a negative value if the filter number is out of range.</p>
<p class="startli">The structure of the <code>flags</code> argument is discussed in <a class="el" href="#ga191c567ee50b2063979cdef156a768c5" title="Adds a filter to the filter pipeline.">H5Pset_filter()</a>.</p>
<p class="startli">On input, <code>cd_nelmts</code> indicates the number of entries in the <code>cd_values</code> array, as allocated by the caller; on return, <code>cd_nelmts</code> contains the number of values defined by the filter.</p>
<p class="startli">If <code>name</code> is a pointer to an array of at least <code>namelen</code> bytes, the filter name will be copied into that array. The name will be null terminated if <code>namelen</code> is large enough. The filter name returned will be the name appearing in the file, the name registered for the filter, or an empty string.</p>
<p class="startli"><code>filter_config</code> is the bit field described in <a class="el" href="group___h5_z.html#ga9ef800ceec249c8819492545def9adba" title="Retrieves information about a filter.">H5Zget_filter_info()</a>.</p>
</li>
</ul>
</dd></dl>
<dl class="section version"><dt>Version</dt><dd>1.8.5 Function extended to work with group creation property lists. </dd></dl>
<dl class="section since"><dt>Since</dt><dd>1.8.0 </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga2d5e9df5f0e93abae11ee5edd82fcec3">&#9670;&#160;</a></span>H5Pget_filter_by_id2()</h2>

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          <td class="memname"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a> H5Pget_filter_by_id2 </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a></td>          <td class="paramname"><span class="paramname"><em>plist_id</em>, </span></td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="_h5_zpublic_8h.html#afae8461c70d47e63be2163af23362237">H5Z_filter_t</a></td>          <td class="paramname"><span class="paramname"><em>filter_id</em>, </span></td>
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          <td class="paramtype">unsigned int *</td>          <td class="paramname"><span class="paramname"><em>flags</em>, </span></td>
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          <td class="paramtype">size_t *</td>          <td class="paramname"><span class="paramname"><em>cd_nelmts</em>, </span></td>
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          <td class="paramtype">unsigned</td>          <td class="paramname"><span class="paramname"><em>cd_values</em>[], </span></td>
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          <td class="paramtype">size_t</td>          <td class="paramname"><span class="paramname"><em>namelen</em>, </span></td>
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          <td class="paramtype">char</td>          <td class="paramname"><span class="paramname"><em>name</em>[], </span></td>
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          <td></td>
          <td class="paramtype">unsigned *</td>          <td class="paramname"><span class="paramname"><em>filter_config</em></span>&#160;)</td>
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<p>Returns information about the specified filter. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">plist_id</td><td>Object creation property list identifier </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">filter_id</td><td>Filter identifier </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">flags</td><td>Bit vector specifying certain general properties of the filter </td></tr>
    <tr><td class="paramdir">[in,out]</td><td class="paramname">cd_nelmts</td><td>Number of elements in <code>cd_values</code> </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">cd_values[]</td><td>Auxiliary data for the filter </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">namelen</td><td>Length of filter name and number of elements in <code>name</code> </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">name[]</td><td>Name of filter </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">filter_config</td><td>Bit field, as described in <a class="el" href="group___h5_z.html#ga9ef800ceec249c8819492545def9adba" title="Retrieves information about a filter.">H5Zget_filter_info()</a></td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Returns a non-negative value if successful; otherwise, returns a negative value.</dd></dl>
<p><a class="el" href="#ga2d5e9df5f0e93abae11ee5edd82fcec3" title="Returns information about the specified filter.">H5Pget_filter_by_id2()</a> returns information about the filter specified in <code>filter_id</code>, a filter identifier.</p>
<p><code>plist_id</code> must be a dataset or group creation property list and <code>filter_id</code> must be in the associated filter pipeline.</p>
<p>The <code>filter_id</code> and <code>flags</code> parameters are used in the same manner as described in the discussion of <a class="el" href="#ga191c567ee50b2063979cdef156a768c5" title="Adds a filter to the filter pipeline.">H5Pset_filter()</a>.</p>
<p>Aside from the fact that they are used for output, the parameters <code>cd_nelmts</code> and <code>cd_values</code>[] are used in the same manner as described in the discussion of <a class="el" href="#ga191c567ee50b2063979cdef156a768c5" title="Adds a filter to the filter pipeline.">H5Pset_filter()</a>. On input, the <code>cd_nelmts</code> parameter indicates the number of entries in the <code>cd_values</code>[] array allocated by the calling program; on exit it contains the number of values defined by the filter.</p>
<p>On input, the <code>namelen</code> parameter indicates the number of characters allocated for the filter name by the calling program in the array <code>name</code>[]. On exit <code>name</code>[] contains the name of the filter with one character of the name in each element of the array.</p>
<p><code>filter_config</code> is the bit field described in <a class="el" href="group___h5_z.html#ga9ef800ceec249c8819492545def9adba" title="Retrieves information about a filter.">H5Zget_filter_info()</a>.</p>
<p>If the filter specified in <code>filter_id</code> is not set for the property list, an error will be returned and <a class="el" href="#ga2d5e9df5f0e93abae11ee5edd82fcec3" title="Returns information about the specified filter.">H5Pget_filter_by_id2()</a> will fail.</p>
<dl class="section version"><dt>Version</dt><dd>1.8.5 Function extended to work with group creation property lists.</dd></dl>
<dl class="section since"><dt>Since</dt><dd>1.8.0 </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#gacbad1ca36a61246b439a25f28e7575fb">&#9670;&#160;</a></span>H5Pget_nfilters()</h2>

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          <td class="memname">int H5Pget_nfilters </td>
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          <td class="paramtype"><a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a></td>          <td class="paramname"><span class="paramname"><em>plist_id</em></span></td><td>)</td>
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<p>Returns the number of filters in the pipeline. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">plist_id</td><td>Object creation property list identifier</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Returns the number of filters in the pipeline if successful; otherwise returns a negative value.</dd></dl>
<p><a class="el" href="#gacbad1ca36a61246b439a25f28e7575fb" title="Returns the number of filters in the pipeline.">H5Pget_nfilters()</a> returns the number of filters defined in the filter pipeline associated with the property list <code>plist_id</code>.</p>
<p>In each pipeline, the filters are numbered from 0 through <code>N-1</code>, where <code>N</code> is the value returned by this function. During output to the file, the filters are applied in increasing order; during input from the file, they are applied in decreasing order.</p>
<p><a class="el" href="#gacbad1ca36a61246b439a25f28e7575fb" title="Returns the number of filters in the pipeline.">H5Pget_nfilters()</a> returns the number of filters in the pipeline, including zero (0) if there are none.</p>
<dl class="section since"><dt>Since</dt><dd>1.0.0 </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#gad99400915d340da978dd6ac5676122c6">&#9670;&#160;</a></span>H5Pget_obj_track_times()</h2>

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          <td class="memname"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a> H5Pget_obj_track_times </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a></td>          <td class="paramname"><span class="paramname"><em>plist_id</em>, </span></td>
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          <td class="paramtype"><a class="el" href="_h5public_8h.html#ad470b00eccd2115c707c02de5fa1120d">hbool_t</a> *</td>          <td class="paramname"><span class="paramname"><em>track_times</em></span>&#160;)</td>
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<p>Determines whether times associated with an object are being recorded. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">plist_id</td><td>Property list identifier </td></tr>
    <tr><td class="paramdir">[out]</td><td class="paramname">track_times</td><td>Boolean value, 1 (true) or 0 (false), specifying whether object times are being recorded</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Returns a non-negative value if successful; otherwise, returns a negative value.</dd></dl>
<p><a class="el" href="#gad99400915d340da978dd6ac5676122c6" title="Determines whether times associated with an object are being recorded.">H5Pget_obj_track_times()</a> queries the object creation property list, <code>plist_id</code>, to determine whether object times are being recorded.</p>
<p>If <code>track_times</code> is returned as 1, times are being recorded; if <code>track_times</code> is returned as 0, times are not being recorded.</p>
<p>Time data can be retrieved with <a class="el" href="group___h5_o.html#gaf4f302a33faba9e1c2b5f64c62ca4ed5">H5Oget_info()</a>, which will return it in the <a class="el" href="_h5version_8h.html#a5f76b0cdd6d68d61f11e46d4f06e50d4">H5O_info_t</a> struct.</p>
<p>If times are not tracked, they will be reported as follows when queried: 12:00 AM UDT, Jan. 1, 1970</p>
<p>See <a class="el" href="#gafa87fab7ebb6c4a8da9a75a86cc62fa3" title="Sets the recording of times associated with an object.">H5Pset_obj_track_times()</a> for further discussion.</p>
<dl class="section since"><dt>Since</dt><dd>1.8.0 </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga12a358b3725a889c1768bbd2b5f541d8">&#9670;&#160;</a></span>H5Pmodify_filter()</h2>

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          <td class="memname"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a> H5Pmodify_filter </td>
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          <td class="paramtype"><a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a></td>          <td class="paramname"><span class="paramname"><em>plist_id</em>, </span></td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="_h5_zpublic_8h.html#afae8461c70d47e63be2163af23362237">H5Z_filter_t</a></td>          <td class="paramname"><span class="paramname"><em>filter</em>, </span></td>
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          <td></td>
          <td class="paramtype">unsigned int</td>          <td class="paramname"><span class="paramname"><em>flags</em>, </span></td>
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          <td></td>
          <td class="paramtype">size_t</td>          <td class="paramname"><span class="paramname"><em>cd_nelmts</em>, </span></td>
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          <td class="paramtype">const unsigned int</td>          <td class="paramname"><span class="paramname"><em>cd_values</em>[]</span>&#160;)</td>
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<p>Modifies a filter in the filter pipeline. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">plist_id</td><td>Object creation property list identifier </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">filter</td><td>Filter to be modified </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">flags</td><td>Bit vector specifying certain general properties of the filter </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">cd_nelmts</td><td>Number of elements in <code>cd_values</code> </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">cd_values[]</td><td>Auxiliary data for the filter</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Returns a non-negative value if successful; otherwise, returns a negative value.</dd></dl>
<p><a class="el" href="#ga12a358b3725a889c1768bbd2b5f541d8" title="Modifies a filter in the filter pipeline.">H5Pmodify_filter()</a> modifies the specified <code>filter</code> in the filter pipeline. <code>plist_id</code> must be a dataset or group creation property list.</p>
<p>The <code>filter</code>, <code>flags</code> <code>cd_nelmts</code>[], and <code>cd_values</code> parameters are used in the same manner and accept the same values as described in the discussion of <a class="el" href="#ga191c567ee50b2063979cdef156a768c5" title="Adds a filter to the filter pipeline.">H5Pset_filter()</a>.</p>
<dl class="section version"><dt>Version</dt><dd>1.8.5 Function extended to work with group creation property lists. </dd></dl>
<dl class="section since"><dt>Since</dt><dd>1.6.0 </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#gabffbf6d013c090fa052ac4bafce8e532">&#9670;&#160;</a></span>H5Premove_filter()</h2>

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          <td class="memname"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a> H5Premove_filter </td>
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          <td class="paramtype"><a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a></td>          <td class="paramname"><span class="paramname"><em>plist_id</em>, </span></td>
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          <td class="paramkey"></td>
          <td></td>
          <td class="paramtype"><a class="el" href="_h5_zpublic_8h.html#afae8461c70d47e63be2163af23362237">H5Z_filter_t</a></td>          <td class="paramname"><span class="paramname"><em>filter</em></span>&#160;)</td>
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<p>Delete one or more filters in the filter pipeline. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">plist_id</td><td>Object creation property list identifier </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">filter</td><td>Filter to be deleted</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Returns a non-negative value if successful; otherwise, returns a negative value.</dd></dl>
<p><a class="el" href="#gabffbf6d013c090fa052ac4bafce8e532" title="Delete one or more filters in the filter pipeline.">H5Premove_filter()</a> removes the specified <code>filter</code> from the filter pipeline in the dataset or group creation property list <code>plist_id</code>.</p>
<p>The <code>filter</code> parameter specifies the filter to be removed. Valid values for use in <code>filter</code> are as follows:</p>
<table class="doxtable">
<tr>
<td><a class="el" href="_h5_zpublic_8h.html#abceefad5226599b12e21071defc2b3cc">H5Z_FILTER_ALL</a> </td><td>Removes all filters from the filter pipeline  </td></tr>
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<td><a class="el" href="_h5_zpublic_8h.html#a9e802e9612b3647e7d3ffe4ce3b8dcce">H5Z_FILTER_DEFLATE</a> </td><td>Data compression filter, employing the gzip algorithm  </td></tr>
<tr>
<td><a class="el" href="_h5_zpublic_8h.html#aa723f1a71601bf22c95620a490ecf1af">H5Z_FILTER_SHUFFLE</a> </td><td>Data shuffling filter  </td></tr>
<tr>
<td><a class="el" href="_h5_zpublic_8h.html#a59ca894c9c2b99b1614b0c46a7407f1c">H5Z_FILTER_FLETCHER32</a> </td><td>Error detection filter, employing the Fletcher32 checksum algorithm  </td></tr>
<tr>
<td><a class="el" href="_h5_zpublic_8h.html#a421d9941c68ebb776573baeb9aa77cd2">H5Z_FILTER_SZIP</a> </td><td>Data compression filter, employing the SZIP algorithm  </td></tr>
<tr>
<td><a class="el" href="_h5_zpublic_8h.html#a8cc463fa1979bd4bfa0dd9aa6a41e49d">H5Z_FILTER_NBIT</a> </td><td>Data compression filter, employing the N-Bit algorithm  </td></tr>
<tr>
<td><a class="el" href="_h5_zpublic_8h.html#a745d2ccb4f7712ed78ef5e562e27d2ca">H5Z_FILTER_SCALEOFFSET</a> </td><td>Data compression filter, employing the scale-offset algorithm  </td></tr>
</table>
<p>Additionally, user-defined filters can be removed with this routine by passing the filter identifier with which they were registered with the HDF5 library.</p>
<p>Attempting to remove a filter that is not in the filter pipeline is an error.</p>
<dl class="section version"><dt>Version</dt><dd>1.8.5 Function extended to work with group creation property lists. </dd></dl>
<dl class="section since"><dt>Since</dt><dd>1.6.3 </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#gade132fded1df87300a4c7175c6bd766a">&#9670;&#160;</a></span>H5Pset_attr_creation_order()</h2>

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          <td class="memname"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a> H5Pset_attr_creation_order </td>
          <td>(</td>
          <td class="paramtype"><a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a></td>          <td class="paramname"><span class="paramname"><em>plist_id</em>, </span></td>
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<p>Sets tracking and indexing of attribute creation order. </p>
<dl class="params"><dt>Parameters</dt><dd>
  <table class="params">
    <tr><td class="paramdir">[in]</td><td class="paramname">plist_id</td><td>Property list identifier </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">crt_order_flags</td><td>Flags specifying whether to track and index attribute creation order. <em>Default:</em> No flag set; attribute creation order is neither tracked not indexed</td></tr>
  </table>
  </dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Returns a non-negative value if successful; otherwise, returns a negative value.</dd></dl>
<p><a class="el" href="#gade132fded1df87300a4c7175c6bd766a" title="Sets tracking and indexing of attribute creation order.">H5Pset_attr_creation_order()</a> sets flags for tracking and indexing attribute creation order on an object.</p>
<p><code>plist_id</code> is a dataset or group creation property list identifier.</p>
<p><code>crt_order_flags</code> contains flags with the following meanings:</p>
<table class="doxtable">
<tr>
<td><a class="el" href="_h5_ppublic_8h.html#aa52f444ce2ba8bc5a062612f195e899f">H5P_CRT_ORDER_TRACKED</a> </td><td>Attribute creation order is tracked but not necessarily indexed.  </td></tr>
<tr>
<td><a class="el" href="_h5_ppublic_8h.html#adfd355619b7da5792a16d7bc491f963d">H5P_CRT_ORDER_INDEXED</a>  </td><td>Attribute creation order is indexed (requires <a class="el" href="_h5_ppublic_8h.html#aa52f444ce2ba8bc5a062612f195e899f">H5P_CRT_ORDER_TRACKED</a>).  </td></tr>
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<p>Default behavior is that attribute creation order is neither tracked nor indexed.</p>
<p><a class="el" href="#gade132fded1df87300a4c7175c6bd766a" title="Sets tracking and indexing of attribute creation order.">H5Pset_attr_creation_order()</a> can be used to set attribute creation order tracking, or to set attribute creation order tracking and indexing.</p>
<dl class="section note"><dt>Note</dt><dd>If a creation order index is to be built, it must be specified in the object creation property list. HDF5 currently provides no mechanism to turn on attribute creation order tracking at object creation time and to build the index later.</dd></dl>
<dl class="section since"><dt>Since</dt><dd>1.8.0 </dd></dl>

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<h2 class="memtitle"><span class="permalink"><a href="#ga0115b13dcbd8770cbdcef3db2ac12ea1">&#9670;&#160;</a></span>H5Pset_attr_phase_change()</h2>

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          <td class="memname"><a class="el" href="_h5public_8h.html#a3b079ecf932a5c599499cf7e298af160">herr_t</a> H5Pset_attr_phase_change </td>
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          <td class="paramtype"><a class="el" href="_h5_ipublic_8h.html#a0045db7ff9c22ad35db6ae91662e1943">hid_t</a></td>          <td class="paramname"><span class="paramname"><em>plist_id</em>, </span></td>
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          <td class="paramtype">unsigned</td>          <td class="paramname"><span class="paramname"><em>max_compact</em>, </span></td>
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          <td class="paramtype">unsigned</td>          <td class="paramname"><span class="paramname"><em>min_dense</em></span>&#160;)</td>
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<p>Sets attribute storage phase change thresholds. </p>
<dl class="params"><dt>Parameters</dt><dd>
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    <tr><td class="paramdir">[in]</td><td class="paramname">plist_id</td><td>Property list identifier </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">max_compact</td><td>Maximum number of attributes to be stored in compact storage (<em>Default:</em> 8); must be greater than or equal to <code>min_dense</code> </td></tr>
    <tr><td class="paramdir">[in]</td><td class="paramname">min_dense</td><td>Minimum number of attributes to be stored in dense storage (<em>Default:</em> 6)</td></tr>
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<dl class="section return"><dt>Returns</dt><dd>Returns a non-negative value if successful; otherwise, returns a negative value.</dd></dl>
<p><a class="el" href="#ga0115b13dcbd8770cbdcef3db2ac12ea1" title="Sets attribute storage phase change thresholds.">H5Pset_attr_phase_change()</a> sets threshold values for attribute storage on an object. These thresholds determine the point at which attribute storage changes from compact storage (i.e., storage in the object header) to dense storage (i.e., storage in a heap and indexed with a B-tree).</p>
<p>In the general case, attributes are initially kept in compact storage. When the number of attributes exceeds <code>max_compact</code>, attribute storage switches to dense storage. If the number of attributes subsequently falls below <code>min_dense</code>, the attributes are returned to compact storage.</p>
<p>If <code>max_compact</code> is set to 0 (zero), dense storage is always used. <code>min_dense</code> must be set to 0 (zero) when <code>max_compact</code> is 0 (zero).</p>
<p><code>plist_id</code> is a dataset or group creation property list identifier.</p>
<dl class="section since"><dt>Since</dt><dd>1.8.0 </dd></dl>

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