mirror of
https://github.com/fofolee/uTools-Manuals.git
synced 2025-06-19 22:32:44 +08:00
164 lines
5.6 KiB
HTML
164 lines
5.6 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
<html>
|
||
<head>
|
||
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
|
||
<title>Repositions the offset of the open file associated with the fd argument to the argument offset according to the directive whence</title>
|
||
</head>
|
||
<body class="docs"><div id="layout">
|
||
<div id="layout-content"><div id="function.eio-seek" class="refentry">
|
||
<div class="refnamediv">
|
||
<h1 class="refname">eio_seek</h1>
|
||
<p class="verinfo">(PECL eio >= 0.5.0b)</p><p class="refpurpose"><span class="refname">eio_seek</span> — <span class="dc-title">Repositions the offset of the open file associated with the <code class="parameter">fd</code> argument to the argument <code class="parameter">offset</code> according to the directive <code class="parameter">whence</code></span></p>
|
||
|
||
</div>
|
||
|
||
<div class="refsect1 description" id="refsect1-function.eio-seek-description">
|
||
<h3 class="title">说明</h3>
|
||
<div class="methodsynopsis dc-description">
|
||
<span class="methodname"><strong>eio_seek</strong></span>
|
||
( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$fd</code></span>
|
||
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$offset</code></span>
|
||
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$whence</code></span>
|
||
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$pri</code><span class="initializer"> = EIO_PRI_DEFAULT</span></span>
|
||
[, <span class="methodparam"><span class="type"><a href="language.types.callable.html" class="type callable">callable</a></span> <code class="parameter">$callback</code><span class="initializer"> = NULL</span></span>
|
||
[, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$data</code><span class="initializer"> = NULL</span></span>
|
||
]]] ) : <span class="type">resource</span></div>
|
||
|
||
<p class="para rdfs-comment">
|
||
<span class="function"><strong>eio_seek()</strong></span> repositions the offset of the open file associated with
|
||
stream, Socket resource, or file descriptor specified by <code class="parameter">fd</code> to the argument <code class="parameter">offset</code> according to the directive <code class="parameter">whence</code> as follows:
|
||
<ul class="simplelist">
|
||
<li class="member"><strong><code>EIO_SEEK_SET</code></strong> - Set position equal to <code class="parameter">offset</code> bytes.</li>
|
||
<li class="member"><strong><code>EIO_SEEK_CUR</code></strong> - Set position to current location plus <code class="parameter">offset</code>.</li>
|
||
<li class="member"><strong><code>EIO_SEEK_END</code></strong> - Set position to end-of-file plus <code class="parameter">offset</code>.</li>
|
||
</ul>
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 parameters" id="refsect1-function.eio-seek-parameters">
|
||
<h3 class="title">参数</h3>
|
||
<dl>
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">fd</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
Stream, Socket resource, or numeric file descriptor
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">offset</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
Starting point from which data is to be read.
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">length</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
Number of bytes to be read.
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">pri</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">请求的优先级：<strong><code>EIO_PRI_DEFAULT</code></strong>，<strong><code>EIO_PRI_MIN</code></strong>，<strong><code>EIO_PRI_MAX</code></strong> 或 <strong><code>NULL</code></strong>。如果是
|
||
<strong><code>NULL</code></strong>，<code class="parameter">pri</code> 将设为
|
||
<strong><code>EIO_PRI_DEFAULT</code></strong>。
|
||
</p>
|
||
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">callback</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
<code class="parameter">callback</code>
|
||
函数在请求完成时被调用。其应匹配一下原型：<div class="example-contents"><div class="phpcode"><pre><span style="color: #000000">
|
||
void callback(mixed $data, int $result[, resource $req]);</span>
|
||
</pre></div></div>
|
||
|
||
<dl>
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">data</code></dt>
|
||
|
||
<dd>
|
||
<p class="para">传递给请求的用户数据。</p></dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">result</code></dt>
|
||
|
||
<dd>
|
||
<p class="para">针对请求的结果的值。通常是相应的系统调用返回的值。</p></dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">req</code></dt>
|
||
|
||
<dd>
|
||
<p class="para">可选的请求资源，可被 <span class="function"><a href="eio_get_last_error.html" class="function">eio_get_last_error()</a></span>
|
||
之类的函数使用。</p></dd>
|
||
|
||
|
||
</dl>
|
||
|
||
</p>
|
||
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">data</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
Arbitrary variable passed to <code class="parameter">callback</code>.
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
</dl>
|
||
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 returnvalues" id="refsect1-function.eio-seek-returnvalues">
|
||
<h3 class="title">返回值</h3>
|
||
<p class="para">
|
||
<span class="function"><strong>eio_seek()</strong></span> returns request resource on success or <strong><code>FALSE</code></strong> on error.
|
||
</p>
|
||
</div>
|
||
|
||
|
||
</div></div></div></body></html> |