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[svn-r4299] Purpose:

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Bringing 'last minute' release branch edits into development branch.
Description:
    RM_H5T.html
    Datatypes.html
        Reworked H5T_conv_t description in both.
        Added H5T_cdata_t struct definition to both.
          Details in Datatypes.html; structs and pointer in RM_H5T.html.
        Copy edits.
Platforms tested:
    IE 5
This commit is contained in:
Frank Baker 2001-08-02 10:56:47 -05:00
parent 73e6cacf08
commit a2788dafc7
2 changed files with 79 additions and 38 deletions
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76
doc/html/Datatypes.html
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@ -2701,29 +2701,55 @@ hid_t dset4 = H5Dcreate (file, "dset4", t2, space, H5P_DEFAULT);
conversion path, then the hard function is favored and when conversion path, then the hard function is favored and when
multiple soft functions apply, the one defined last is favored. multiple soft functions apply, the one defined last is favored.
<p>A data conversion function is of type <code>H5T_conv_t</code> <p>A data conversion function is of type <code>H5T_conv_t</code>,
which is defined as: which is defined as follows:
<p> <dir><pre><em>typedef</em> herr_t (<em>*H5T_conv_t</em>) (hid_t <em>src_id</em>,
<code><pre> hid_t <em>dst_id</em>,
typedef herr_t (*H5T_conv_t)(hid_t <em>src_type</em>, H5T_cdata_t *<em>cdata</em>,
hid_t <em>dest_type</em>, hsize_t <em>nelmts</em>,
H5T_cdata_t *<em>cdata</em>, size_t <em>buf_stride</em>,
size_t <em>nelmts</em>, size_t <em>bkg_stride</em>,
void *<em>buffer</em>, void *<em>buffer</em>,
void *<em>background</em>); void *<em>bkg_buffer</em>,
</pre></code> hid_t <em>dset_xfer_plist</em>);</pre></dir>
<p>The conversion function is called with the source and <p>The conversion function is called with
destination datatypes (<em>src_type</em> and the source and destination datatypes (<em>src_id</em> and
<em>dst_type</em>), path-constant data (<em>cdata</em>), the <em>dst_id</em>),
number of instances of the datatype to convert the path-constant data struct (<em>cdata</em>),
(<em>nelmts</em>), a buffer which initially contains an array of the number of instances of the datatype to convert (<em>nelmts</em>),
data having the source type and on return will contain an array a conversion buffer (<em>buffer</em>) which initially contains
of data having the destination type (<em>buffer</em>), and a an array of data having the source type and on return will
temporary or background buffer (<em>background</em>). Functions contain an array of data having the destination type,
return a negative value on failure and some other value on a temporary or background buffer (<em>bkg_buffer</em>,
success. see description of <code>H5T_BKG_YES</code> below),
conversion and background buffer strides (<em>buf_stride</em> and
<em>bkg_stride</em>) that indicate what data is to be converted, and
a dataset transfer properties list (<em>dset_xfer_plist</em>).
<p><em>buf_stride</em> and <em>bkg_stride</em> are in bytes and
are related to the size of the datatype.
If every data element is to be converted, the parameter's value
is equal to the size of the datatype;
if every other data element is to be converted, the parameter's value
is equal to twice the size of the datatype; etc.
<p><em>dset_xfer_plist</em> may contain properties that are passed
to the read and write calls.
This parameter is currently used only with variable-length data.
<p><em>bkg_buffer</em> and <em>bkg_stride</em> are used only with
compound datatypes.
<p>The path-constant data struct, <code>H5T_cdata_t</code>,
is declared as follows:
<dir><pre><em>typedef</em> struct <em>*H5T_cdata_t</em> (H5T_cmd_t <em>command</em>,
H5T_bkg_t <em>need_bkg</em>,
hbool_t *<em>recalc</em>,
void *<em>priv</em>)</pre></dir>
<p>The <code>command</code> field of the <em>cdata</em> argument <p>The <code>command</code> field of the <em>cdata</em> argument
determines what happens within the conversion function. It's determines what happens within the conversion function. It's
@ -2883,9 +2909,9 @@ typedef herr_t (*H5T_conv_t)(hid_t <em>src_type</em>,
5 5
6 herr_t 6 herr_t
7 cray_ushort2be (hid_t src, hid_t dst, 7 cray_ushort2be (hid_t src, hid_t dst,
8 H5T_cdata_t *cdata, 8 H5T_cdata_t *cdata, hsize_t nelmts,
9 size_t nelmts, void *buf, 9 size_t buf_str, size_t bkg_str, void *buf,
10 const void *background) 10 const void *background, hid_t plist)
11 { 11 {
12 unsigned char *src = (unsigned char *)buf; 12 unsigned char *src = (unsigned char *)buf;
13 unsigned char *dst = src; 13 unsigned char *dst = src;
@ -3063,7 +3089,7 @@ H5Tregister(H5T_PERS_SOFT, "cus2be",
<!-- Created: Thu Dec 4 14:57:32 EST 1997 --> <!-- Created: Thu Dec 4 14:57:32 EST 1997 -->
<!-- hhmts start --> <!-- hhmts start -->
Last modified: 16 February 2001 Last modified: 2 August 2001
<!-- hhmts end --> <!-- hhmts end -->
<br> <br>

41
doc/html/RM_H5T.html
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@ -2171,17 +2171,33 @@ zero.
For soft conversion functions, only the class of these types is important. For soft conversion functions, only the class of these types is important.
<p> <p>
The type of the conversion function pointer is declared as: The type of the conversion function pointer is declared as:
<dl> <dir>
<dd><code>typedef</code> <em>herr_t </em>(<code>*H5T_conv_t</code>) <pre><code>typedef</code> <em>herr_t </em>(<code>*H5T_conv_t</code>) (<em>hid_t </em><code>src_id</code>,
(<em>hid_t </em><code>src_id</code>, <em>hid_t </em><code>dst_id</code>,
<em>hid_t </em><code>dst_id</code>, <em>H5T_cdata_t *</em><code>cdata</code>,
<em>H5T_cdata_t *</em><code>cdata</code>, <em>hsize_t </em><code>nelmts</code>,
<em>size_t </em><code>nelmts</code>, <em>size_t </em><code>buf_stride</code>,
<em>size_t </em><code>stride</code>, <em>size_t </em><code>bkg_stride</code>,
<em>void *</em><code>buf</code>, <em>void *</em><code>buf</code>,
<em>void *</em><code>bkg</code>, <em>void *</em><code>bkg</code>,
<em>hid_t </em><code>dset_xfer_plist</code>); <em>hid_t </em><code>dset_xfer_plist</code>)</pre>
</dl> </dir>
<p>
The <code>H5T_cdata_t</code> struct is declared as:
<dir>
<pre><code>typedef</code> <em>struct </em><code>*H5T_cdata_t</code> (<em>H5T_cmd_t </em><code>command</code>,
<em>H5T_bkg_t </em><code>need_bkg</code>,
<em>hbool_t *</em><code>recalc</code>,
<em>void *</em><code>priv</code>)</pre>
</dir>
<p>
The <code>H5T_conv_t</code> parameters and
the elements of the <code>H5T_cdata_t</code> struct
are described more fully in the
&ldquo;<a href="Datatypes.html#Datatypes-DataConversion"
target="WinUG">Data Conversion</a>&rdquo;
section of&nbsp; &ldquo;The Datatype Interface (H5T)&rdquo;
in the <cite>HDF5 User's Guide</cite>.
<dt><strong>Parameters:</strong> <dt><strong>Parameters:</strong>
<dl> <dl>
<dt><em>H5T_pers_t</em> <code>pers</code> <dt><em>H5T_pers_t</em> <code>pers</code>
@ -2712,10 +2728,9 @@ H5T&nbsp;&nbsp;
<a href="mailto:hdfhelp@ncsa.uiuc.edu">HDF Help Desk</a> <a href="mailto:hdfhelp@ncsa.uiuc.edu">HDF Help Desk</a>
<br> <br>
Last modified: 5 July 2001 Last modified: 2 August 2001
<br> <br>
Describes HDF5 Release 1.5, Unreleased Development Branch Describes HDF5 Release 1.5, Unreleased Development Branch
</body> </body>
</html> </html>