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<title>libics: Enumerated data types</title>
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<p class=header>libics v.1.5 Online Documentation. ©2000-2010 by Cris Luengo and others.</p>
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<h1>Enumerated data types</h1>
<h3 class="ident"><a name="Ics_DataType"></a>Ics_DataType</h3>
<p><tt class="typeident">Ics_DataType</tt> is an
<tt class="keyword">enum</tt> that defines the numeric representation
for the imels in the following values:</p>
<ul>
<li><tt class="constant">Ics_unknown</tt></li>
<li><tt class="constant">Ics_uint8</tt>:
<tt class="keyword">unsigned char</tt></li>
<li><tt class="constant">Ics_sint8</tt>:
<tt class="keyword">signed char</tt></li>
<li><tt class="constant">Ics_uint16</tt>:
<tt class="keyword">unsigned short</tt></li>
<li><tt class="constant">Ics_sint16</tt>:
<tt class="keyword">signed short</tt></li>
<li><tt class="constant">Ics_uint32</tt>:
<tt class="keyword">unsigned int</tt></li>
<li><tt class="constant">Ics_sint32</tt>:
<tt class="keyword">signed int</tt></li>
<li><tt class="constant">Ics_real32</tt>:
<tt class="keyword">float</tt></li>
<li><tt class="constant">Ics_real64</tt>:
<tt class="keyword">double</tt></li>
<li><tt class="constant">Ics_complex32</tt>:
{ <tt class="keyword">float</tt>, <tt class="keyword">float</tt> }</li>
<li><tt class="constant">Ics_complex64</tt>:
{ <tt class="keyword">double</tt>, <tt class="keyword">double</tt> }</li>
</ul>
<h3 class="ident"><a name="Ics_Compression"></a>Ics_Compression</h3>
<p><tt class="typeident">Ics_Compression</tt> is an
<tt class="keyword">enum</tt> that defines the compression method used
to store the imel data. These are the currently defined methods:</p>
<ul>
<li><tt class="constant">IcsCompr_uncompressed</tt></li>
<li><tt class="constant">IcsCompr_compress</tt>: Using the UNIX
<tt class="keyword">compress</tt> utility, which uses LZW compression.
When setting this value for writing, it is automatically translated to
<tt class="constant">IcsCompr_gzip</tt>, which is a better method.
Files written with this method can be read, but only if all data is
read in one go. That is, block-wise reading is not supported. For more
flexibility, it is possible to manually <tt class="keyword">uncompress</tt>
(<tt class="keyword">gunzip</tt> is also able to do this) the .ids file
and edit the <tt class="constant">'.ics'</tt> header to read
<tt class="keyword">compression uncompressed</tt>.</li>
<li><tt class="constant">IcsCompr_gzip</tt>: Using the
<tt class="keyword">gzip</tt> compression method
(the zlib libarary must be linked to). The compression parameter
is a value between 0 and 9: 1 gives best speed, 9 gives best
compression, 0 gives no compression at all. A good value to use
is 6.</li>
</ul>
<h3 class="ident"><a name="Ics_HistoryWhich"></a>Ics_HistoryWhich</h3>
<p><tt class="typeident">Ics_HistoryWhich</tt> is an
<tt class="keyword">enum</tt> used by
<tt class="funcident"><a href="TopLevelFunctions.html#IcsGetHistoryString">IcsGetHistoryString</a></tt>.
It defines the following values:</p>
<ul>
<li><tt class="constant">IcsWhich_First</tt></li>
<li><tt class="constant">IcsWhich_Next</tt></li>
</ul>
<h3 class="ident"><a name="Ics_Format"></a>Ics_Format</h3>
<p><tt class="typeident">Ics_Format</tt> is an
<tt class="keyword">enum</tt> used by the low-level interface functions
<tt class="funcident"><a href="LowLevelFunctions.html#IcsGetPropsDataType">IcsGetPropsDataType</a></tt>
and
<tt class="funcident"><a href="LowLevelFunctions.html#IcsGetDataTypeProps">IcsGetDataTypeProps</a></tt>.
It defines the numeric representation in the following values:</p>
<ul>
<li><tt class="constant">IcsForm_unknown</tt></li>
<li><tt class="constant">IcsForm_integer</tt></li>
<li><tt class="constant">IcsForm_real</tt></li>
<li><tt class="constant">IcsForm_complex</tt></li>
</ul>
<h3 class="ident"><a name="Ics_FileMode"></a>Ics_FileMode</h3>
<p><tt class="typeident">Ics_FileMode</tt> is an
<tt class="keyword">enum</tt> used internally by the high-level interface
functions to avoid the user doing something unexpected.
It defines the following values:</p>
<ul>
<li><tt class="constant">IcsFileMode_read</tt>: Reading data and metadata allowed.</li>
<li><tt class="constant">IcsFileMode_write</tt>: Writing data and metadata allowed, reading metadata allowed.</li>
<li><tt class="constant">IcsFileMode_update</tt>: Reading and writing metadata allowed, reading data allowed.</li>
</ul>
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