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<div class="title">mschm_decompressor Struct Reference</div> </div>
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<p>A decompressor for .CHM (Microsoft HTMLHelp) files.
<a href="structmschm__decompressor.html#details">More...</a></p>
<p><code>#include <<a class="el" href="mspack_8h_source.html">mspack.h</a>></code></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-attribs"></a>
Data Fields</h2></td></tr>
<tr class="memitem:ab42830f8ef4b434654e50a283852f0a1"><td class="memItemLeft" align="right" valign="top">struct <a class="el" href="structmschmd__header.html">mschmd_header</a> *(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structmschm__decompressor.html#ab42830f8ef4b434654e50a283852f0a1">open</a> )(struct <a class="el" href="structmschm__decompressor.html">mschm_decompressor</a> *self, const char *filename)</td></tr>
<tr class="memdesc:ab42830f8ef4b434654e50a283852f0a1"><td class="mdescLeft"> </td><td class="mdescRight">Opens a CHM helpfile and reads its contents. <a href="#ab42830f8ef4b434654e50a283852f0a1">More...</a><br/></td></tr>
<tr class="separator:ab42830f8ef4b434654e50a283852f0a1"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a21c15034a3ae43acf6c817728fa566f1"><td class="memItemLeft" align="right" valign="top">void(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structmschm__decompressor.html#a21c15034a3ae43acf6c817728fa566f1">close</a> )(struct <a class="el" href="structmschm__decompressor.html">mschm_decompressor</a> *self, struct <a class="el" href="structmschmd__header.html">mschmd_header</a> *chm)</td></tr>
<tr class="memdesc:a21c15034a3ae43acf6c817728fa566f1"><td class="mdescLeft"> </td><td class="mdescRight">Closes a previously opened CHM helpfile. <a href="#a21c15034a3ae43acf6c817728fa566f1">More...</a><br/></td></tr>
<tr class="separator:a21c15034a3ae43acf6c817728fa566f1"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aaeb393cbab926a072719f14c0fbe29d6"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structmschm__decompressor.html#aaeb393cbab926a072719f14c0fbe29d6">extract</a> )(struct <a class="el" href="structmschm__decompressor.html">mschm_decompressor</a> *self, struct <a class="el" href="structmschmd__file.html">mschmd_file</a> *file, const char *filename)</td></tr>
<tr class="memdesc:aaeb393cbab926a072719f14c0fbe29d6"><td class="mdescLeft"> </td><td class="mdescRight">Extracts a file from a CHM helpfile. <a href="#aaeb393cbab926a072719f14c0fbe29d6">More...</a><br/></td></tr>
<tr class="separator:aaeb393cbab926a072719f14c0fbe29d6"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:adc4595f636c976e7c2713f09963e9147"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structmschm__decompressor.html#adc4595f636c976e7c2713f09963e9147">last_error</a> )(struct <a class="el" href="structmschm__decompressor.html">mschm_decompressor</a> *self)</td></tr>
<tr class="memdesc:adc4595f636c976e7c2713f09963e9147"><td class="mdescLeft"> </td><td class="mdescRight">Returns the error code set by the most recently called method. <a href="#adc4595f636c976e7c2713f09963e9147">More...</a><br/></td></tr>
<tr class="separator:adc4595f636c976e7c2713f09963e9147"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a2efa8bb3ce3908506595500e9e3087a7"><td class="memItemLeft" align="right" valign="top">struct <a class="el" href="structmschmd__header.html">mschmd_header</a> *(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structmschm__decompressor.html#a2efa8bb3ce3908506595500e9e3087a7">fast_open</a> )(struct <a class="el" href="structmschm__decompressor.html">mschm_decompressor</a> *self, const char *filename)</td></tr>
<tr class="memdesc:a2efa8bb3ce3908506595500e9e3087a7"><td class="mdescLeft"> </td><td class="mdescRight">Opens a CHM helpfile quickly. <a href="#a2efa8bb3ce3908506595500e9e3087a7">More...</a><br/></td></tr>
<tr class="separator:a2efa8bb3ce3908506595500e9e3087a7"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:abeeb6197f7f9ba92f226dc2dc07ed85e"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structmschm__decompressor.html#abeeb6197f7f9ba92f226dc2dc07ed85e">fast_find</a> )(struct <a class="el" href="structmschm__decompressor.html">mschm_decompressor</a> *self, struct <a class="el" href="structmschmd__header.html">mschmd_header</a> *chm, const char *filename, struct <a class="el" href="structmschmd__file.html">mschmd_file</a> *f_ptr, int f_size)</td></tr>
<tr class="memdesc:abeeb6197f7f9ba92f226dc2dc07ed85e"><td class="mdescLeft"> </td><td class="mdescRight">Finds file details quickly. <a href="#abeeb6197f7f9ba92f226dc2dc07ed85e">More...</a><br/></td></tr>
<tr class="separator:abeeb6197f7f9ba92f226dc2dc07ed85e"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>A decompressor for .CHM (Microsoft HTMLHelp) files. </p>
<p>All fields are READ ONLY.</p>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="mspack_8h.html#a5829a2023927ad4dc8bd452f3b294851" title="Creates a new CHM decompressor. ">mspack_create_chm_decompressor()</a>, <a class="el" href="mspack_8h.html#a50c0799f5c1a128672c024a05c79cac8" title="Destroys an existing CHM decompressor. ">mspack_destroy_chm_decompressor()</a> </dd></dl>
</div><h2 class="groupheader">Field Documentation</h2>
<a class="anchor" id="a21c15034a3ae43acf6c817728fa566f1"></a>
<div class="memitem">
<div class="memproto">
<table class="memname">
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<td class="memname">void(* mschm_decompressor::close)(struct <a class="el" href="structmschm__decompressor.html">mschm_decompressor</a> *self, struct <a class="el" href="structmschmd__header.html">mschmd_header</a> *chm)</td>
</tr>
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</div><div class="memdoc">
<p>Closes a previously opened CHM helpfile. </p>
<p>This closes a CHM helpfile, frees the <a class="el" href="structmschmd__header.html" title="A structure which represents a CHM helpfile. ">mschmd_header</a> and all <a class="el" href="structmschmd__file.html" title="A structure which represents a file stored in a CHM helpfile. ">mschmd_file</a> structures associated with it (if any). This works on both helpfiles opened with <a class="el" href="structmschm__decompressor.html#ab42830f8ef4b434654e50a283852f0a1" title="Opens a CHM helpfile and reads its contents. ">open()</a> and helpfiles opened with <a class="el" href="structmschm__decompressor.html#a2efa8bb3ce3908506595500e9e3087a7" title="Opens a CHM helpfile quickly. ">fast_open()</a>.</p>
<p>The CHM header pointer is now invalid and cannot be used again. All <a class="el" href="structmschmd__file.html" title="A structure which represents a file stored in a CHM helpfile. ">mschmd_file</a> pointers referencing that CHM are also now invalid, and cannot be used again.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">self</td><td>a self-referential pointer to the <a class="el" href="structmschm__decompressor.html" title="A decompressor for .CHM (Microsoft HTMLHelp) files. ">mschm_decompressor</a> instance being called </td></tr>
<tr><td class="paramname">chm</td><td>the CHM helpfile to close </td></tr>
</table>
</dd>
</dl>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="structmschm__decompressor.html#ab42830f8ef4b434654e50a283852f0a1" title="Opens a CHM helpfile and reads its contents. ">open()</a>, <a class="el" href="structmschm__decompressor.html#a2efa8bb3ce3908506595500e9e3087a7" title="Opens a CHM helpfile quickly. ">fast_open()</a> </dd></dl>
</div>
</div>
<a class="anchor" id="aaeb393cbab926a072719f14c0fbe29d6"></a>
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<td class="memname">int(* mschm_decompressor::extract)(struct <a class="el" href="structmschm__decompressor.html">mschm_decompressor</a> *self, struct <a class="el" href="structmschmd__file.html">mschmd_file</a> *file, const char *filename)</td>
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</table>
</div><div class="memdoc">
<p>Extracts a file from a CHM helpfile. </p>
<p>This extracts a file from a CHM helpfile and writes it to the given filename. The filename of the file, <a class="el" href="structmscabd__file.html#a181b45655523f55ed114b51249d305f8" title="The filename of the file. ">mscabd_file::filename</a>, is not used by <a class="el" href="structmschm__decompressor.html#aaeb393cbab926a072719f14c0fbe29d6" title="Extracts a file from a CHM helpfile. ">extract()</a>, but can be used by the caller as a guide for constructing an appropriate filename.</p>
<p>This method works both with files found in the <a class="el" href="structmschmd__header.html#aecdd3b5e84606785e9620a70e8f0d0ed" title="A list of all non-system files in the CHM helpfile. ">mschmd_header::files</a> and <a class="el" href="structmschmd__header.html#ac38b56f77e2a44d998e57ba9301e39d5" title="A list of all system files in the CHM helpfile. ">mschmd_header::sysfiles</a> list and <a class="el" href="structmschmd__file.html" title="A structure which represents a file stored in a CHM helpfile. ">mschmd_file</a> structures generated on the fly by <a class="el" href="structmschm__decompressor.html#abeeb6197f7f9ba92f226dc2dc07ed85e" title="Finds file details quickly. ">fast_find()</a>.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">self</td><td>a self-referential pointer to the <a class="el" href="structmschm__decompressor.html" title="A decompressor for .CHM (Microsoft HTMLHelp) files. ">mschm_decompressor</a> instance being called </td></tr>
<tr><td class="paramname">file</td><td>the file to be decompressed </td></tr>
<tr><td class="paramname">filename</td><td>the filename of the file being written to </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>an error code, or MSPACK_ERR_OK if successful </dd></dl>
</div>
</div>
<a class="anchor" id="abeeb6197f7f9ba92f226dc2dc07ed85e"></a>
<div class="memitem">
<div class="memproto">
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<td class="memname">int(* mschm_decompressor::fast_find)(struct <a class="el" href="structmschm__decompressor.html">mschm_decompressor</a> *self, struct <a class="el" href="structmschmd__header.html">mschmd_header</a> *chm, const char *filename, struct <a class="el" href="structmschmd__file.html">mschmd_file</a> *f_ptr, int f_size)</td>
</tr>
</table>
</div><div class="memdoc">
<p>Finds file details quickly. </p>
<p>Instead of reading all CHM helpfile headers and building a list of files, <a class="el" href="structmschm__decompressor.html#a2efa8bb3ce3908506595500e9e3087a7" title="Opens a CHM helpfile quickly. ">fast_open()</a> and <a class="el" href="structmschm__decompressor.html#abeeb6197f7f9ba92f226dc2dc07ed85e" title="Finds file details quickly. ">fast_find()</a> are intended for finding file details only when they are needed. The CHM file format includes an on-disk file index to allow this.</p>
<p>Given a case-sensitive filename, <a class="el" href="structmschm__decompressor.html#abeeb6197f7f9ba92f226dc2dc07ed85e" title="Finds file details quickly. ">fast_find()</a> will search the on-disk index for that file.</p>
<p>If the file was found, the caller-provided <a class="el" href="structmschmd__file.html" title="A structure which represents a file stored in a CHM helpfile. ">mschmd_file</a> structure will be filled out like so:</p>
<ul>
<li>section: the correct value for the found file</li>
<li>offset: the correct value for the found file</li>
<li>length: the correct value for the found file</li>
<li>all other structure elements: NULL or 0</li>
</ul>
<p>If the file was not found, MSPACK_ERR_OK will still be returned as the result, but the caller-provided structure will be filled out like so:</p>
<ul>
<li>section: NULL</li>
<li>offset: 0</li>
<li>length: 0</li>
<li>all other structure elements: NULL or 0</li>
</ul>
<p>This method is intended to be used in conjunction with CHM helpfiles opened with <a class="el" href="structmschm__decompressor.html#a2efa8bb3ce3908506595500e9e3087a7" title="Opens a CHM helpfile quickly. ">fast_open()</a>, but it also works with helpfiles opened using the regular <a class="el" href="structmschm__decompressor.html#ab42830f8ef4b434654e50a283852f0a1" title="Opens a CHM helpfile and reads its contents. ">open()</a>.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">self</td><td>a self-referential pointer to the <a class="el" href="structmschm__decompressor.html" title="A decompressor for .CHM (Microsoft HTMLHelp) files. ">mschm_decompressor</a> instance being called </td></tr>
<tr><td class="paramname">chm</td><td>the CHM helpfile to search for the file </td></tr>
<tr><td class="paramname">filename</td><td>the filename of the file to search for </td></tr>
<tr><td class="paramname">f_ptr</td><td>a pointer to a caller-provded <a class="el" href="structmschmd__file.html" title="A structure which represents a file stored in a CHM helpfile. ">mschmd_file</a> structure </td></tr>
<tr><td class="paramname">f_size</td><td><code>sizeof(struct mschmd_file)</code> </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>an error code, or MSPACK_ERR_OK if successful </dd></dl>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="structmschm__decompressor.html#ab42830f8ef4b434654e50a283852f0a1" title="Opens a CHM helpfile and reads its contents. ">open()</a>, <a class="el" href="structmschm__decompressor.html#a21c15034a3ae43acf6c817728fa566f1" title="Closes a previously opened CHM helpfile. ">close()</a>, <a class="el" href="structmschm__decompressor.html#abeeb6197f7f9ba92f226dc2dc07ed85e" title="Finds file details quickly. ">fast_find()</a>, <a class="el" href="structmschm__decompressor.html#aaeb393cbab926a072719f14c0fbe29d6" title="Extracts a file from a CHM helpfile. ">extract()</a> </dd></dl>
</div>
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<a class="anchor" id="a2efa8bb3ce3908506595500e9e3087a7"></a>
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<div class="memproto">
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<td class="memname">struct <a class="el" href="structmschmd__header.html">mschmd_header</a>*(* mschm_decompressor::fast_open)(struct <a class="el" href="structmschm__decompressor.html">mschm_decompressor</a> *self, const char *filename)</td>
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<p>Opens a CHM helpfile quickly. </p>
<p>If the file opened is a valid CHM helpfile, only essential headers will be read. A <a class="el" href="structmschmd__header.html" title="A structure which represents a CHM helpfile. ">mschmd_header</a> structure will be still be returned, as with <a class="el" href="structmschm__decompressor.html#ab42830f8ef4b434654e50a283852f0a1" title="Opens a CHM helpfile and reads its contents. ">open()</a>, but the <a class="el" href="structmschmd__header.html#aecdd3b5e84606785e9620a70e8f0d0ed" title="A list of all non-system files in the CHM helpfile. ">mschmd_header::files</a> field will be NULL. No files details will be automatically read. The <a class="el" href="structmschm__decompressor.html#abeeb6197f7f9ba92f226dc2dc07ed85e" title="Finds file details quickly. ">fast_find()</a> method must be used to obtain file details.</p>
<p>In the case of an error occuring, NULL is returned and the error code is available from <a class="el" href="structmschm__decompressor.html#adc4595f636c976e7c2713f09963e9147" title="Returns the error code set by the most recently called method. ">last_error()</a>.</p>
<p>The filename pointer should be considered "in use" until <a class="el" href="structmschm__decompressor.html#a21c15034a3ae43acf6c817728fa566f1" title="Closes a previously opened CHM helpfile. ">close()</a> is called on the CHM helpfile.</p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">self</td><td>a self-referential pointer to the <a class="el" href="structmschm__decompressor.html" title="A decompressor for .CHM (Microsoft HTMLHelp) files. ">mschm_decompressor</a> instance being called </td></tr>
<tr><td class="paramname">filename</td><td>the filename of the CHM helpfile. This is passed directly to <a class="el" href="structmspack__system.html#a1a85cac5eeb55db6a432fe3824aa04a3" title="Opens a file for reading, writing, appending or updating. ">mspack_system::open()</a>. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>a pointer to a <a class="el" href="structmschmd__header.html" title="A structure which represents a CHM helpfile. ">mschmd_header</a> structure, or NULL on failure </dd></dl>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="structmschm__decompressor.html#ab42830f8ef4b434654e50a283852f0a1" title="Opens a CHM helpfile and reads its contents. ">open()</a>, <a class="el" href="structmschm__decompressor.html#a21c15034a3ae43acf6c817728fa566f1" title="Closes a previously opened CHM helpfile. ">close()</a>, <a class="el" href="structmschm__decompressor.html#abeeb6197f7f9ba92f226dc2dc07ed85e" title="Finds file details quickly. ">fast_find()</a>, <a class="el" href="structmschm__decompressor.html#aaeb393cbab926a072719f14c0fbe29d6" title="Extracts a file from a CHM helpfile. ">extract()</a> </dd></dl>
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<td class="memname">int(* mschm_decompressor::last_error)(struct <a class="el" href="structmschm__decompressor.html">mschm_decompressor</a> *self)</td>
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<p>Returns the error code set by the most recently called method. </p>
<p>This is useful for <a class="el" href="structmschm__decompressor.html#ab42830f8ef4b434654e50a283852f0a1" title="Opens a CHM helpfile and reads its contents. ">open()</a> and <a class="el" href="structmschm__decompressor.html#a2efa8bb3ce3908506595500e9e3087a7" title="Opens a CHM helpfile quickly. ">fast_open()</a>, which do not return an error code directly.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">self</td><td>a self-referential pointer to the <a class="el" href="structmschm__decompressor.html" title="A decompressor for .CHM (Microsoft HTMLHelp) files. ">mschm_decompressor</a> instance being called </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>the most recent error code </dd></dl>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="structmschm__decompressor.html#ab42830f8ef4b434654e50a283852f0a1" title="Opens a CHM helpfile and reads its contents. ">open()</a>, <a class="el" href="structmschm__decompressor.html#aaeb393cbab926a072719f14c0fbe29d6" title="Extracts a file from a CHM helpfile. ">extract()</a> </dd></dl>
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<td class="memname">struct <a class="el" href="structmschmd__header.html">mschmd_header</a>*(* mschm_decompressor::open)(struct <a class="el" href="structmschm__decompressor.html">mschm_decompressor</a> *self, const char *filename)</td>
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<p>Opens a CHM helpfile and reads its contents. </p>
<p>If the file opened is a valid CHM helpfile, all headers will be read and a <a class="el" href="structmschmd__header.html" title="A structure which represents a CHM helpfile. ">mschmd_header</a> structure will be returned, with a full list of files.</p>
<p>In the case of an error occuring, NULL is returned and the error code is available from <a class="el" href="structmschm__decompressor.html#adc4595f636c976e7c2713f09963e9147" title="Returns the error code set by the most recently called method. ">last_error()</a>.</p>
<p>The filename pointer should be considered "in use" until <a class="el" href="structmschm__decompressor.html#a21c15034a3ae43acf6c817728fa566f1" title="Closes a previously opened CHM helpfile. ">close()</a> is called on the CHM helpfile.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">self</td><td>a self-referential pointer to the <a class="el" href="structmschm__decompressor.html" title="A decompressor for .CHM (Microsoft HTMLHelp) files. ">mschm_decompressor</a> instance being called </td></tr>
<tr><td class="paramname">filename</td><td>the filename of the CHM helpfile. This is passed directly to <a class="el" href="structmspack__system.html#a1a85cac5eeb55db6a432fe3824aa04a3" title="Opens a file for reading, writing, appending or updating. ">mspack_system::open()</a>. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>a pointer to a <a class="el" href="structmschmd__header.html" title="A structure which represents a CHM helpfile. ">mschmd_header</a> structure, or NULL on failure </dd></dl>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="structmschm__decompressor.html#a21c15034a3ae43acf6c817728fa566f1" title="Closes a previously opened CHM helpfile. ">close()</a> </dd></dl>
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<hr/>The documentation for this struct was generated from the following file:<ul>
<li><a class="el" href="mspack_8h_source.html">mspack.h</a></li>
</ul>
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