📄 gfileinputstream.html
字号:
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html; charset=US-ASCII"><title>GFileInputStream</title><meta name="generator" content="DocBook XSL Stylesheets V1.73.2"><link rel="start" href="index.html" title="GIO Reference Manual"><link rel="up" href="streaming.html" title="Streaming I/O"><link rel="prev" href="GOutputStream.html" title="GOutputStream"><link rel="next" href="GFileOutputStream.html" title="GFileOutputStream"><meta name="generator" content="GTK-Doc V1.9 (XML mode)"><link rel="stylesheet" href="style.css" type="text/css"><link rel="part" href="pt01.html" title="Part I. GIO Overview"><link rel="chapter" href="ch01.html" title="Introduction"><link rel="chapter" href="ch02.html" title="Compiling GIO applications"><link rel="chapter" href="ch03.html" title="Running GIO applications"><link rel="chapter" href="gio-extension-points.html" title="Extending GIO"><link rel="part" href="pt02.html" title="Part II. API Reference"><link rel="chapter" href="file_ops.html" title="File Operations"><link rel="chapter" href="file_mon.html" title="File System Monitoring"><link rel="chapter" href="async.html" title="Asynchronous I/O"><link rel="chapter" href="streaming.html" title="Streaming I/O"><link rel="chapter" href="types.html" title="File types and applications"><link rel="chapter" href="volume_mon.html" title="Volumes and Drives"><link rel="chapter" href="icons.html" title="Icons"><link rel="chapter" href="utils.html" title="Utilities"><link rel="chapter" href="extending.html" title="Extending GIO"><link rel="part" href="migrating.html" title="Part III. Migrating to GIO"><link rel="chapter" href="ch14.html" title="Migrating from POSIX to GIO"><link rel="chapter" href="ch15.html" title="Migrating from GnomeVFS to GIO"><link rel="chapter" href="gio-hierarchy.html" title="Object Hierarchy"><link rel="index" href="ix01.html" title="Index"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><table class="navigation" id="top" width="100%" summary="Navigation header" cellpadding="2" cellspacing="2"><tr valign="middle"><td><a accesskey="p" href="GOutputStream.html"><img src="left.png" width="24" height="24" border="0" alt="Prev"></a></td><td><a accesskey="u" href="streaming.html"><img src="up.png" width="24" height="24" border="0" alt="Up"></a></td><td><a accesskey="h" href="index.html"><img src="home.png" width="24" height="24" border="0" alt="Home"></a></td><th width="100%" align="center">GIO Reference Manual</th><td><a accesskey="n" href="GFileOutputStream.html"><img src="right.png" width="24" height="24" border="0" alt="Next"></a></td></tr><tr><td colspan="5" class="shortcuts"><nobr><a href="#id3110978" class="shortcut">Top</a>  |  <a href="#id3193065" class="shortcut">Description</a>  |  <a href="#id3193014" class="shortcut">Object Hierarchy</a>  |  <a href="#id3193044" class="shortcut">Implemented Interfaces</a></nobr></td></tr></table><div class="refentry" lang="en"><a name="GFileInputStream"></a><div class="titlepage"></div><div class="refnamediv"><table width="100%"><tr><td valign="top"><h2><a name="id3110978"></a><span class="refentrytitle">GFileInputStream</span></h2><p>GFileInputStream — File input streaming operations</p></td><td valign="top" align="right"></td></tr></table></div><div class="refsynopsisdiv"><h2>Synopsis</h2><pre class="synopsis">#include <gio/gio.h> <a class="link" href="GFileInputStream.html#GFileInputStream-struct">GFileInputStream</a>;<a class="link" href="GFileInfo.html" title="GFileInfo">GFileInfo</a>* <a class="link" href="GFileInputStream.html#g-file-input-stream-query-info">g_file_input_stream_query_info</a> (<a class="link" href="GFileInputStream.html" title="GFileInputStream">GFileInputStream</a> *stream, char *attributes, <a class="link" href="GCancellable.html" title="GCancellable">GCancellable</a> *cancellable, <ahref="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError">GError</a> **error);void <a class="link" href="GFileInputStream.html#g-file-input-stream-query-info-async">g_file_input_stream_query_info_async</a> (<a class="link" href="GFileInputStream.html" title="GFileInputStream">GFileInputStream</a> *stream, char *attributes, int io_priority, <a class="link" href="GCancellable.html" title="GCancellable">GCancellable</a> *cancellable, <a class="link" href="GAsyncResult.html#GAsyncReadyCallback">GAsyncReadyCallback</a> callback, <ahref="/usr/share/gtk-doc/html/glib/glib-Basic-Types.html#gpointer">gpointer</a> user_data);<a class="link" href="GFileInfo.html" title="GFileInfo">GFileInfo</a>* <a class="link" href="GFileInputStream.html#g-file-input-stream-query-info-finish">g_file_input_stream_query_info_finish</a> (<a class="link" href="GFileInputStream.html" title="GFileInputStream">GFileInputStream</a> *stream, <a class="link" href="GAsyncResult.html" title="GAsyncResult">GAsyncResult</a> *result, <ahref="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError">GError</a> **error);</pre></div><div class="refsect1" lang="en"><a name="id3193014"></a><h2>Object Hierarchy</h2><pre class="synopsis"> <ahref="/usr/share/gtk-doc/html/gobject/gobject-The-Base-Object-Type.html#GObject">GObject</a> +----<a class="link" href="GInputStream.html" title="GInputStream">GInputStream</a> +----GFileInputStream</pre></div><div class="refsect1" lang="en"><a name="id3193044"></a><h2>Implemented Interfaces</h2><p>GFileInputStream implements <a class="link" href="GSeekable.html" title="GSeekable">GSeekable</a>.</p></div><div class="refsect1" lang="en"><a name="id3193065"></a><h2>Description</h2><p>GFileInputStream provides input streams that take theircontent from a file.</p><p>GFileInputStream implements <a class="link" href="GSeekable.html" title="GSeekable"><span class="type">GSeekable</span></a>, which allows the input stream to jump to arbitrary positions in the file, provided the filesystem of the file allows it. In addition to the generic g_seekable_ API, GFileInputStream has its own API for seeking and positioning. To find the position of a file input stream, use <code class="function">g_file_input_stream_tell()</code>. To find out if a file input stream supports seeking, use <code class="function">g_file_input_stream_can_seek()</code>.To position a file input stream, use <code class="function">g_file_input_stream_seek()</code>.</p><p></p></div><div class="refsect1" lang="en"><a name="id3193128"></a><h2>Details</h2><div class="refsect2" lang="en"><a name="id3193138"></a><h3><a name="GFileInputStream-struct"></a>GFileInputStream</h3><a class="indexterm" name="id3193150"></a><pre class="programlisting">typedef struct _GFileInputStream GFileInputStream;</pre><p>A subclass of GInputStream for opened files. This addsa few file-specific operations and seeking.</p><p><a class="link" href="GFileInputStream.html" title="GFileInputStream"><span class="type">GFileInputStream</span></a> implements <a class="link" href="GSeekable.html" title="GSeekable"><span class="type">GSeekable</span></a>.</p><p></p></div><hr><div class="refsect2" lang="en"><a name="id3193190"></a><h3><a name="g-file-input-stream-query-info"></a>g_file_input_stream_query_info ()</h3><a class="indexterm" name="id3193201"></a><pre class="programlisting"><a class="link" href="GFileInfo.html" title="GFileInfo">GFileInfo</a>* g_file_input_stream_query_info (<a class="link" href="GFileInputStream.html" title="GFileInputStream">GFileInputStream</a> *stream, char *attributes, <a class="link" href="GCancellable.html" title="GCancellable">GCancellable</a> *cancellable, <ahref="/usr/share/gtk-doc/html/glib/glib-Error-Reporting.html#GError">GError</a> **error);</pre><p>Queries a file input stream the given <em class="parameter"><code>attributes</code></em>. This function blocks while querying the stream. For the asynchronous (non-blocking) version of this function, see <a class="link" href="GFileInputStream.html#g-file-input-stream-query-info-async"><code class="function">g_file_input_stream_query_info_async()</code></a>. While the stream is blocked, the stream will set the pending flag internally, and any other operations on the stream will fail with <a class="link" href="gio-GIOError.html#G-IO-ERROR-PENDING:CAPS"><code class="literal">G_IO_ERROR_PENDING</code></a>.</p><p></p><div class="variablelist"><table border="0"><col align="left" valign="top"><tbody>⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -