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-<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
- "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
-<html>
-<head>
- <title>LuaZip: Reading files inside zip files</title>
- <link rel="stylesheet" href="http://www.keplerproject.org/doc.css" type="text/css"/>
- <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
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-<body>
-
-<div id="container">
-
-<div id="product">
- <div id="product_logo">
- <a href="http://www.keplerproject.org"><img alt="LuaZip logo" src="luazip-128.png"/></a>
- </div>
- <div id="product_name"><big><strong>LuaZip</strong></big></div>
- <div id="product_description">Reading files inside zip files</div>
-</div> <!-- id="product" -->
-
-<div id="main">
-
-<div id="navigation">
-<h1>LuaZip</h1>
- <ul>
- <li><a href="index.html">Home</a>
- <ul>
- <li><a href="index.html#overview">Overview</a></li>
- <li><a href="index.html#status">Status</a></li>
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- <li><a href="index.html#history">History</a></li>
- <li><a href="index.html#credits">Credits</a></li>
- <li><a href="index.html#contact">Contact</a></li>
- </ul>
- </li>
- <li><strong>Manual</strong>
- <ul>
- <li><a href="manual.html#introduction">Introduction</a></li>
- <li><a href="manual.html#installation">Installation</a></li>
- <li><a href="manual.html#reference">Reference</a></li>
- </ul>
- </li>
- <li><a href="examples.html">Examples</a></li>
- <li><a href="http://luaforge.net/projects/luazip/">Project</a>
- <ul>
- <li><a href="http://luaforge.net/tracker/?group_id=8">Bug Tracker</a></li>
- <li><a href="http://luaforge.net/scm/?group_id=8">CVS</a></li>
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- <li><a href="license.html">License</a></li>
- </ul>
-</div> <!-- id="navigation" -->
-
-<div id="content">
-
-
-<h2><a name="introduction"></a>Introduction</h2>
-
-<p>LuaZip is a lightweight <a href="http://www.lua.org">Lua</a> 5.0 extension library
-that can be used to read files stored inside zip files. It uses
-<a href="http://zziplib.sourceforge.net">zziplib</a> to do all the hard work.</p>
-
-<p>The API exposed to Lua is very simple and very similiar to the usual file handling
-functions provided by the
-<a href="http://www.lua.org/manual/5.0/manual.html#5.6">I/O Lua standard library</a>.
-In fact, the API is so similar that parts of this manual are extracted from the Lua manual,
-copyrighted by Tecgraf, PUC-Rio.</p>
-
-<h2><a name="installation"></a>Installation</h2>
-
-<p>LuaZip follows the
-<a href="http://www.keplerproject.org/compat/">package model</a>
-for Lua 5.1, therefore it should be "installed". Refer to
-<a href="http://www.keplerproject.org/compat/manual.html#configuration">
-Compat-5.1 configuration</a> section about how to install the compiled
-binary properly.</p>
-
-<p>If you are using Unix you may need to download
-<a href="http://zziplib.sourceforge.net">zziplib 0.13.36</a></p>
-
-<p>If you are using Windows, the binary version of LuaZip includes zziplib
-(<code>zlib1.dll</code>). </p>
-
-<h2><a name="reference"></a>Reference</h2>
-
-<dl>
- <dt><strong>zip.open (filename)</strong></dt>
- <dd>This function opens a zip file and returns a new zip file handle. In case of
- error it returns nil and an error message. Unlike <code>io.open</code>, there is no
- <code>mode</code> parameter, as the only supported mode is "read".</dd>
-
- <dt><strong>zip.openfile (filename [, extensions]])</strong></dt>
- <dd>This function opens a file and returns a file handle. In case of
- error it returns nil and an error message. Unlike <code>io.open</code>, there is no
- <code>mode</code> parameter, as the only supported mode is "read".<br/>
- This function implements a virtual file system based on optionally compressed files.
- Instead of simply looking for a file at a given path, this function goes recursively up
- through all path separators ("/") looking for zip files there. If it finds a zip file,
- this function use the remaining path to open the requested file.<br/>
- The optional parameter <em>extensions</em> allows the use of file extensions other than .zip
- during the lookup. It can be a string corresponding to the extension or an indexed table
- with the lookup extensions sequence.</dd>
-
- <dt><strong>zfile:close ()</strong></dt>
- <dd>This function closes a zfile opened by <code>zip.open</code></dd>
-
- <dt><strong>zfile:files ()</strong></dt>
- <dd>Returns an iterator function that returns a new table containing the
- following information each time it is called:
- <ul>
- <li><code>filename</code>: the full path of a file</li>
- <li><code>compressed_size</code>: the compressed size of the file in bytes</li>
- <li><code>uncompressed_size</code>: the uncompressed size of the file in bytes</li>
- </ul>
- </dd>
-
- <dt><strong>zfile:open (filename)</strong></dt>
- <dd>This function opens a file that is stored inside the zip file opened by <code>zip.open</code>.<br/>
- The filename may contain the full path of the file contained inside the zip. The
- directory separator must be '/'.<br/>
- Unlike <code>f:open</code>, there is no <code>mode</code> parameter, as the only
- supported mode is "read".</dd>
-
- <dt><strong>file:read (format1, ...)</strong></dt>
- <dd>Reads a <code>file</code> according to the given formats, which specify what to read.<br/>
- For each format, the function returns a string with the characters read, or nil if it cannot read
- data with the specified format. When called without formats, it uses a default format that reads
- the entire next line (see below).<br/>
- The available formats are:
- <ul>
- <li><code>"*a"</code>: reads the whole file, starting at the current position. On end of file, it
- returns the empty string.</li>
- <li><code>"*l"</code>: reads the next line (skipping the end of line), returns nil on end of file.
- This is the default format.</li>
- <li><code><i>number</i></code>: reads a string with up to that number of characters, returning nil
- on end of file.</li>
- </ul>
- <br/>
- Unlike the standard I/O read, the format <code>"*n"</code> is not supported.</dd>
-
- <dt><strong>file:seek ([whence] [, offset])</strong></dt>
- <dd>Sets and gets the file position, measured from the beginning of the file, to the position given
- by <code>offset</code> plus a base specified by the string <code>whence</code>, as follows:
- <ul>
- <li><code>set</code>: base is position 0 (beginning of the file);</li>
- <li><code>cur</code>: base is current position;</li>
- <li><code>end</code>: base is end of file;</li>
- </ul>
- In case of success, function <code>seek</code> returns the final file position, measured in bytes
- from the beginning of the file. If this function fails, it returns nil, plus an error string.
- The default value for <code>whence</code> is <code>"cur"</code>, and for <code>offset</code> is 0.
- Therefore, the call <code>file:seek()</code> returns the current file position, without changing
- it; the call <code>file:seek("set")</code> sets the position to the beginning of the file (and returns 0);
- and the call <code>file:seek("end")</code> sets the position to the end of the file, and returns its
- size.</dd>
-
- <dt><strong>file:close ()</strong></dt>
- <dd>This function closes a file opened by <code>zfile:open</code>.</dd>
-
- <dt><strong>file:lines ()</strong></dt>
- <dd>Returns an iterator function that returns a new line from the file each time it is called.
- Therefore, the construction<br/>
- <pre class="example">for line in file:lines() do ... end</pre>
- will iterate over all lines of the file.</dd>
-</dl>
-
-</div> <!-- id="content" -->
-
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