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    zip_file_extra_fields_count.mdoc -- count extra field for file in zip
    Copyright (C) 2012-2017 Dieter Baron and Thomas Klausner

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   <title>ZIP_FILE_EXTRA_FIELDS_COUNT(3)</title>
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 <body>
 <table class="head">
   <tr>
     <td class="head-ltitle">ZIP_FILE_EXTRA_FIELDS_COUNT(3)</td>
     <td class="head-vol">Library Functions Manual</td>
     <td class="head-rtitle">ZIP_FILE_EXTRA_FIELDS_COUNT(3)</td>
   </tr>
 </table>
 <div class="manual-text">
 <section class="Sh">
 <h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
 <code class="Nm">zip_file_extra_fields_count</code>,
   <code class="Nm">zip_file_extra_fields_count_by_id</code> &#x2014;
 <div class="Nd">count extra fields for file in zip</div>
 </section>
 <section class="Sh">
 <h1 class="Sh" id="LIBRARY"><a class="permalink" href="#LIBRARY">LIBRARY</a></h1>
 libzip (-lzip)
 </section>
 <section class="Sh">
 <h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
 <code class="In">#include &lt;<a class="In">zip.h</a>&gt;</code>
 <p class="Pp"><var class="Ft">zip_int16_t</var>
   <br/>
   <code class="Fn">zip_file_extra_fields_count</code>(<var class="Fa" style="white-space: nowrap;">zip_t
     *archive</var>, <var class="Fa" style="white-space: nowrap;">zip_uint64_t
     index</var>, <var class="Fa" style="white-space: nowrap;">zip_flags_t
     flags</var>);</p>
 <p class="Pp"><var class="Ft">zip_int16_t</var>
   <br/>
   <code class="Fn">zip_file_extra_fields_count_by_id</code>(<var class="Fa" style="white-space: nowrap;">zip_t
     *archive</var>, <var class="Fa" style="white-space: nowrap;">zip_uint64_t
     index</var>, <var class="Fa" style="white-space: nowrap;">zip_uint16_t
     extra_field_id</var>,
     <var class="Fa" style="white-space: nowrap;">zip_flags_t flags</var>);</p>
 </section>
 <section class="Sh">
 <h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
 The <code class="Fn">zip_file_extra_fields_count</code>() function counts the
   extra fields for the file at position <var class="Ar">index</var> in the zip
   archive.
 <p class="Pp">The following <var class="Ar">flags</var> are supported:</p>
 <div class="Bd-indent">
 <dl class="Bl-tag">
   <dt><a class="permalink" href="#ZIP_FL_CENTRAL"><code class="Dv" id="ZIP_FL_CENTRAL">ZIP_FL_CENTRAL</code></a></dt>
   <dd>Count extra fields from the archive's central directory.</dd>
   <dt><a class="permalink" href="#ZIP_FL_LOCAL"><code class="Dv" id="ZIP_FL_LOCAL">ZIP_FL_LOCAL</code></a></dt>
   <dd>Count extra fields from the local file headers.</dd>
   <dt><a class="permalink" href="#ZIP_FL_UNCHANGED"><code class="Dv" id="ZIP_FL_UNCHANGED">ZIP_FL_UNCHANGED</code></a></dt>
   <dd>Count the original unchanged extra fields, ignoring any changes made.</dd>
 </dl>
 </div>
 <p class="Pp">The <code class="Fn">zip_file_extra_fields_count_by_id</code>()
     function counts the extra fields with ID (two-byte signature)
     <var class="Ar">extra_field_id</var>. The other arguments are the same as
     for <code class="Fn">zip_file_extra_fields_count</code>().</p>
 <p class="Pp">Extra fields that are the same in the central directory and the
     local file header are merged into one. Therefore, the counts with
     <code class="Dv">ZIP_FL_CENTRAL</code> and
     <code class="Dv">ZIP_FL_LOCAL</code> do not need to add up to the same value
     as when given <code class="Dv">ZIP_FL_CENTRAL|ZIP_FL_LOCAL</code> at the
     same time.</p>
 </section>
 <section class="Sh">
 <h1 class="Sh" id="RETURN_VALUES"><a class="permalink" href="#RETURN_VALUES">RETURN
   VALUES</a></h1>
 Upon successful completion, the requested number of extra fields is returned.
   Otherwise, -1 is returned and the error code in <var class="Ar">archive</var>
   is set to indicate the error.
 </section>
 <section class="Sh">
 <h1 class="Sh" id="ERRORS"><a class="permalink" href="#ERRORS">ERRORS</a></h1>
 <code class="Fn">zip_file_extra_fields_count</code>() and
   <code class="Fn">zip_file_extra_fields_count_by_id</code>() fail if:
 <dl class="Bl-tag">
   <dt>[<a class="permalink" href="#ZIP_ER_NOENT"><code class="Er" id="ZIP_ER_NOENT">ZIP_ER_NOENT</code></a>]</dt>
   <dd><var class="Ar">index</var> is not a valid file index in
       <var class="Ar">archive</var>.</dd>
 </dl>
 </section>
 <section class="Sh">
 <h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
   ALSO</a></h1>
 <a class="Xr" href="libzip.html">libzip(3)</a>,
   <a class="Xr" href="zip_file_extra_field_delete.html">zip_file_extra_field_delete(3)</a>,
   <a class="Xr" href="zip_file_extra_field_get.html">zip_file_extra_field_get(3)</a>,
   <a class="Xr" href="zip_file_extra_field_set.html">zip_file_extra_field_set(3)</a>
 </section>
 <section class="Sh">
 <h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
 <code class="Fn">zip_file_extra_fields_count</code>() and
   <code class="Fn">zip_file_extra_fields_count_by_id</code>() were added in
   libzip 0.11.
 </section>
 <section class="Sh">
 <h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
 <span class="An">Dieter Baron</span>
   &lt;<a class="Mt" href="mailto:dillo@nih.at">dillo@nih.at</a>&gt; and
   <span class="An">Thomas Klausner</span>
   &lt;<a class="Mt" href="mailto:tk@giga.or.at">tk@giga.or.at</a>&gt;
 </section>
 </div>
 <table class="foot">
   <tr>
     <td class="foot-date">December 18, 2017</td>
     <td class="foot-os">NiH</td>
   </tr>
 </table>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<!-- This is an automatically generated file. Do not edit.
	zip_file_extra_fields_count.mdoc -- count extra field for file in zip
	Copyright (C) 2012-2017 Dieter Baron and Thomas Klausner

	This file is part of libzip, a library to manipulate ZIP files.
	The authors can be contacted at <libzip@nih.at>

	Redistribution and use in source and binary forms, with or without
	modification, are permitted provided that the following conditions
	are met:
	1. Redistributions of source code must retain the above copyright
	notice, this list of conditions and the following disclaimer.
	2. Redistributions in binary form must reproduce the above copyright
	notice, this list of conditions and the following disclaimer in
	the documentation and/or other materials provided with the
	distribution.
	3. The names of the authors may not be used to endorse or promote
	products derived from this software without specific prior
	written permission.

	THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
	OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
	WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
	DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
	GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
	IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
	OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
	IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	-->
	<head>
	<meta charset="utf-8"/>
	<link rel="stylesheet" href="../nih-man.css" type="text/css" media="all"/>
	<title>ZIP_FILE_EXTRA_FIELDS_COUNT(3)</title>
	</head>
	<body>
	<table class="head">
	<tr>
	<td class="head-ltitle">ZIP_FILE_EXTRA_FIELDS_COUNT(3)</td>
	<td class="head-vol">Library Functions Manual</td>
	<td class="head-rtitle">ZIP_FILE_EXTRA_FIELDS_COUNT(3)</td>
	</tr>
	</table>
	<div class="manual-text">
	<section class="Sh">
	<h1 class="Sh" id="NAME"><a class="permalink" href="#NAME">NAME</a></h1>
	<code class="Nm">zip_file_extra_fields_count</code>,
	<code class="Nm">zip_file_extra_fields_count_by_id</code> —
	<div class="Nd">count extra fields for file in zip</div>
	</section>
	<section class="Sh">
	<h1 class="Sh" id="LIBRARY"><a class="permalink" href="#LIBRARY">LIBRARY</a></h1>
	libzip (-lzip)
	</section>
	<section class="Sh">
	<h1 class="Sh" id="SYNOPSIS"><a class="permalink" href="#SYNOPSIS">SYNOPSIS</a></h1>
	<code class="In">#include <<a class="In">zip.h</a>></code>
	<p class="Pp"><var class="Ft">zip_int16_t</var>
	<br/>
	<code class="Fn">zip_file_extra_fields_count</code>(<var class="Fa" style="white-space: nowrap;">zip_t
	*archive</var>, <var class="Fa" style="white-space: nowrap;">zip_uint64_t
	index</var>, <var class="Fa" style="white-space: nowrap;">zip_flags_t
	flags</var>);</p>
	<p class="Pp"><var class="Ft">zip_int16_t</var>
	<br/>
	<code class="Fn">zip_file_extra_fields_count_by_id</code>(<var class="Fa" style="white-space: nowrap;">zip_t
	*archive</var>, <var class="Fa" style="white-space: nowrap;">zip_uint64_t
	index</var>, <var class="Fa" style="white-space: nowrap;">zip_uint16_t
	extra_field_id</var>,
	<var class="Fa" style="white-space: nowrap;">zip_flags_t flags</var>);</p>
	</section>
	<section class="Sh">
	<h1 class="Sh" id="DESCRIPTION"><a class="permalink" href="#DESCRIPTION">DESCRIPTION</a></h1>
	The <code class="Fn">zip_file_extra_fields_count</code>() function counts the
	extra fields for the file at position <var class="Ar">index</var> in the zip
	archive.
	<p class="Pp">The following <var class="Ar">flags</var> are supported:</p>
	<div class="Bd-indent">
	<dl class="Bl-tag">
	<dt><a class="permalink" href="#ZIP_FL_CENTRAL"><code class="Dv" id="ZIP_FL_CENTRAL">ZIP_FL_CENTRAL</code></a></dt>
	<dd>Count extra fields from the archive's central directory.</dd>
	<dt><a class="permalink" href="#ZIP_FL_LOCAL"><code class="Dv" id="ZIP_FL_LOCAL">ZIP_FL_LOCAL</code></a></dt>
	<dd>Count extra fields from the local file headers.</dd>
	<dt><a class="permalink" href="#ZIP_FL_UNCHANGED"><code class="Dv" id="ZIP_FL_UNCHANGED">ZIP_FL_UNCHANGED</code></a></dt>
	<dd>Count the original unchanged extra fields, ignoring any changes made.</dd>
	</dl>
	</div>
	<p class="Pp">The <code class="Fn">zip_file_extra_fields_count_by_id</code>()
	function counts the extra fields with ID (two-byte signature)
	<var class="Ar">extra_field_id</var>. The other arguments are the same as
	for <code class="Fn">zip_file_extra_fields_count</code>().</p>
	<p class="Pp">Extra fields that are the same in the central directory and the
	local file header are merged into one. Therefore, the counts with
	<code class="Dv">ZIP_FL_CENTRAL</code> and
	<code class="Dv">ZIP_FL_LOCAL</code> do not need to add up to the same value
	as when given <code class="Dv">ZIP_FL_CENTRAL\|ZIP_FL_LOCAL</code> at the
	same time.</p>
	</section>
	<section class="Sh">
	<h1 class="Sh" id="RETURN_VALUES"><a class="permalink" href="#RETURN_VALUES">RETURN
	VALUES</a></h1>
	Upon successful completion, the requested number of extra fields is returned.
	Otherwise, -1 is returned and the error code in <var class="Ar">archive</var>
	is set to indicate the error.
	</section>
	<section class="Sh">
	<h1 class="Sh" id="ERRORS"><a class="permalink" href="#ERRORS">ERRORS</a></h1>
	<code class="Fn">zip_file_extra_fields_count</code>() and
	<code class="Fn">zip_file_extra_fields_count_by_id</code>() fail if:
	<dl class="Bl-tag">
	<dt>[<a class="permalink" href="#ZIP_ER_NOENT"><code class="Er" id="ZIP_ER_NOENT">ZIP_ER_NOENT</code></a>]</dt>
	<dd><var class="Ar">index</var> is not a valid file index in
	<var class="Ar">archive</var>.</dd>
	</dl>
	</section>
	<section class="Sh">
	<h1 class="Sh" id="SEE_ALSO"><a class="permalink" href="#SEE_ALSO">SEE
	ALSO</a></h1>
	<a class="Xr" href="libzip.html">libzip(3)</a>,
	<a class="Xr" href="zip_file_extra_field_delete.html">zip_file_extra_field_delete(3)</a>,
	<a class="Xr" href="zip_file_extra_field_get.html">zip_file_extra_field_get(3)</a>,
	<a class="Xr" href="zip_file_extra_field_set.html">zip_file_extra_field_set(3)</a>
	</section>
	<section class="Sh">
	<h1 class="Sh" id="HISTORY"><a class="permalink" href="#HISTORY">HISTORY</a></h1>
	<code class="Fn">zip_file_extra_fields_count</code>() and
	<code class="Fn">zip_file_extra_fields_count_by_id</code>() were added in
	libzip 0.11.
	</section>
	<section class="Sh">
	<h1 class="Sh" id="AUTHORS"><a class="permalink" href="#AUTHORS">AUTHORS</a></h1>
	<span class="An">Dieter Baron</span>
	<<a class="Mt" href="mailto:dillo@nih.at">dillo@nih.at</a>> and
	<span class="An">Thomas Klausner</span>
	<<a class="Mt" href="mailto:tk@giga.or.at">tk@giga.or.at</a>>
	</section>
	</div>
	<table class="foot">
	<tr>
	<td class="foot-date">December 18, 2017</td>
	<td class="foot-os">NiH</td>
	</tr>
	</table>
	</body>
	</html>