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AppPkg: Add the Lua interpreter and library.

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StdLib: Add support and include files for Lua.

The sources for the Lua standalone interpreter, as well as its library, have been added to AppPkg/Applications/Lua.  The Lua library, LuaLib, can be used to embed Lua into new applications.

The Lua header files, needed for both building and embedding, are located in StdLib/Include/Lua.  The original versions of these header files, in the source directory, have been converted into stubs that reference the include files in StdLib.  This allows us to keep the Lua sources as close to the distributed version as possible.

Documentation is contained in the Lua/doc directory.  Further information is available at www.lua.org.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed Off by:  Bruce Maynard <Bruce.Maynard@Emulex.Com>
Reviewed by:    Daryl McDaniel <daryl.mcdaniel@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@16313 6f19259b-4bc3-4df7-8a09-765794883524
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darylm503
2014-11-07 20:18:01 +00:00
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML>
<HEAD>
<TITLE>Lua 5.2 Reference Manual - contents</TITLE>
<LINK REL="stylesheet" TYPE="text/css" HREF="lua.css">
<META HTTP-EQUIV="content-type" CONTENT="text/html; charset=iso-8859-1">
<STYLE TYPE="text/css">
ul {
list-style-type: none ;
list-style-position: outside ;
}
</STYLE>
</HEAD>
<BODY>
<HR>
<H1>
<A HREF="http://www.lua.org/"><IMG SRC="logo.gif" ALT="" BORDER=0></A>
Lua 5.2 Reference Manual
</H1>
<P>
The reference manual is the official definition of the Lua language.
For a complete introduction to Lua programming, see the book
<A HREF="http://www.lua.org/pil/">Programming in Lua</A>.
<P>
<A HREF="manual.html">start</A>
&middot;
<A HREF="#contents">contents</A>
&middot;
<A HREF="#index">index</A>
<HR>
<SMALL>
Copyright &copy; 2011&ndash;2013 Lua.org, PUC-Rio.
Freely available under the terms of the
<A HREF="http://www.lua.org/license.html">Lua license</A>.
</SMALL>
<H2><A NAME="contents">Contents</A></H2>
<UL style="padding: 0">
<LI><A HREF="manual.html">1 &ndash; Introduction</A>
<P>
<LI><A HREF="manual.html#2">2 &ndash; Basic Concepts</A>
<UL>
<LI><A HREF="manual.html#2.1">2.1 &ndash; Values and Types</A>
<LI><A HREF="manual.html#2.2">2.2 &ndash; Environments and the Global Environment</A>
<LI><A HREF="manual.html#2.3">2.3 &ndash; Error Handling</A>
<LI><A HREF="manual.html#2.4">2.4 &ndash; Metatables and Metamethods</A>
<LI><A HREF="manual.html#2.5">2.5 &ndash; Garbage Collection</A>
<UL>
<LI><A HREF="manual.html#2.5.1">2.5.1 &ndash; Garbage-Collection Metamethods</A>
<LI><A HREF="manual.html#2.5.2">2.5.2 &ndash; Weak Tables</A>
</UL>
<LI><A HREF="manual.html#2.6">2.6 &ndash; Coroutines</A>
</UL>
<P>
<LI><A HREF="manual.html#3">3 &ndash; The Language</A>
<UL>
<LI><A HREF="manual.html#3.1">3.1 &ndash; Lexical Conventions</A>
<LI><A HREF="manual.html#3.2">3.2 &ndash; Variables</A>
<LI><A HREF="manual.html#3.3">3.3 &ndash; Statements</A>
<UL>
<LI><A HREF="manual.html#3.3.1">3.3.1 &ndash; Blocks</A>
<LI><A HREF="manual.html#3.3.2">3.3.2 &ndash; Chunks</A>
<LI><A HREF="manual.html#3.3.3">3.3.3 &ndash; Assignment</A>
<LI><A HREF="manual.html#3.3.4">3.3.4 &ndash; Control Structures</A>
<LI><A HREF="manual.html#3.3.5">3.3.5 &ndash; For Statement</A>
<LI><A HREF="manual.html#3.3.6">3.3.6 &ndash; Function Calls as Statements</A>
<LI><A HREF="manual.html#3.3.7">3.3.7 &ndash; Local Declarations</A>
</UL>
<LI><A HREF="manual.html#3.4">3.4 &ndash; Expressions</A>
<UL>
<LI><A HREF="manual.html#3.4.1">3.4.1 &ndash; Arithmetic Operators</A>
<LI><A HREF="manual.html#3.4.2">3.4.2 &ndash; Coercion</A>
<LI><A HREF="manual.html#3.4.3">3.4.3 &ndash; Relational Operators</A>
<LI><A HREF="manual.html#3.4.4">3.4.4 &ndash; Logical Operators</A>
<LI><A HREF="manual.html#3.4.5">3.4.5 &ndash; Concatenation</A>
<LI><A HREF="manual.html#3.4.6">3.4.6 &ndash; The Length Operator</A>
<LI><A HREF="manual.html#3.4.7">3.4.7 &ndash; Precedence</A>
<LI><A HREF="manual.html#3.4.8">3.4.8 &ndash; Table Constructors</A>
<LI><A HREF="manual.html#3.4.9">3.4.9 &ndash; Function Calls</A>
<LI><A HREF="manual.html#3.4.10">3.4.10 &ndash; Function Definitions</A>
</UL>
<LI><A HREF="manual.html#3.5">3.5 &ndash; Visibility Rules</A>
</UL>
<P>
<LI><A HREF="manual.html#4">4 &ndash; The Application Program Interface</A>
<UL>
<LI><A HREF="manual.html#4.1">4.1 &ndash; The Stack</A>
<LI><A HREF="manual.html#4.2">4.2 &ndash; Stack Size</A>
<LI><A HREF="manual.html#4.3">4.3 &ndash; Valid and Acceptable Indices</A>
<LI><A HREF="manual.html#4.4">4.4 &ndash; C Closures</A>
<LI><A HREF="manual.html#4.5">4.5 &ndash; Registry</A>
<LI><A HREF="manual.html#4.6">4.6 &ndash; Error Handling in C</A>
<LI><A HREF="manual.html#4.7">4.7 &ndash; Handling Yields in C</A>
<LI><A HREF="manual.html#4.8">4.8 &ndash; Functions and Types</A>
<LI><A HREF="manual.html#4.9">4.9 &ndash; The Debug Interface</A>
</UL>
<P>
<LI><A HREF="manual.html#5">5 &ndash; The Auxiliary Library</A>
<UL>
<LI><A HREF="manual.html#5.1">5.1 &ndash; Functions and Types</A>
</UL>
<P>
<LI><A HREF="manual.html#6">6 &ndash; Standard Libraries</A>
<UL>
<LI><A HREF="manual.html#6.1">6.1 &ndash; Basic Functions</A>
<LI><A HREF="manual.html#6.2">6.2 &ndash; Coroutine Manipulation</A>
<LI><A HREF="manual.html#6.3">6.3 &ndash; Modules</A>
<LI><A HREF="manual.html#6.4">6.4 &ndash; String Manipulation</A>
<UL>
<LI><A HREF="manual.html#6.4.1">6.4.1 &ndash; Patterns</A>
</UL>
<LI><A HREF="manual.html#6.5">6.5 &ndash; Table Manipulation</A>
<LI><A HREF="manual.html#6.6">6.6 &ndash; Mathematical Functions</A>
<LI><A HREF="manual.html#6.7">6.7 &ndash; Bitwise Operations</A>
<LI><A HREF="manual.html#6.8">6.8 &ndash; Input and Output Facilities</A>
<LI><A HREF="manual.html#6.9">6.9 &ndash; Operating System Facilities</A>
<LI><A HREF="manual.html#6.10">6.10 &ndash; The Debug Library</A>
</UL>
<P>
<LI><A HREF="manual.html#7">7 &ndash; Lua Standalone</A>
<P>
<LI><A HREF="manual.html#8">8 &ndash; Incompatibilities with the Previous Version</A>
<UL>
<LI><A HREF="manual.html#8.1">8.1 &ndash; Changes in the Language</A>
<LI><A HREF="manual.html#8.2">8.2 &ndash; Changes in the Libraries</A>
<LI><A HREF="manual.html#8.3">8.3 &ndash; Changes in the API</A>
</UL>
<P>
<LI><A HREF="manual.html#9">9 &ndash; The Complete Syntax of Lua</A>
</UL>
<H2><A NAME="index">Index</A></H2>
<TABLE WIDTH="100%">
<TR VALIGN="top">
<TD>
<H3><A NAME="functions">Lua functions</A></H3>
<P>
<A HREF="manual.html#pdf-_G">_G</A><BR>
<A HREF="manual.html#pdf-_VERSION">_VERSION</A><BR>
<P>
<A HREF="manual.html#pdf-assert">assert</A><BR>
<A HREF="manual.html#pdf-collectgarbage">collectgarbage</A><BR>
<A HREF="manual.html#pdf-dofile">dofile</A><BR>
<A HREF="manual.html#pdf-error">error</A><BR>
<A HREF="manual.html#pdf-getmetatable">getmetatable</A><BR>
<A HREF="manual.html#pdf-ipairs">ipairs</A><BR>
<A HREF="manual.html#pdf-load">load</A><BR>
<A HREF="manual.html#pdf-loadfile">loadfile</A><BR>
<A HREF="manual.html#pdf-next">next</A><BR>
<A HREF="manual.html#pdf-pairs">pairs</A><BR>
<A HREF="manual.html#pdf-pcall">pcall</A><BR>
<A HREF="manual.html#pdf-print">print</A><BR>
<A HREF="manual.html#pdf-rawequal">rawequal</A><BR>
<A HREF="manual.html#pdf-rawget">rawget</A><BR>
<A HREF="manual.html#pdf-rawlen">rawlen</A><BR>
<A HREF="manual.html#pdf-rawset">rawset</A><BR>
<A HREF="manual.html#pdf-require">require</A><BR>
<A HREF="manual.html#pdf-select">select</A><BR>
<A HREF="manual.html#pdf-setmetatable">setmetatable</A><BR>
<A HREF="manual.html#pdf-tonumber">tonumber</A><BR>
<A HREF="manual.html#pdf-tostring">tostring</A><BR>
<A HREF="manual.html#pdf-type">type</A><BR>
<A HREF="manual.html#pdf-xpcall">xpcall</A><BR>
<P>
<A HREF="manual.html#pdf-bit32.arshift">bit32.arshift</A><BR>
<A HREF="manual.html#pdf-bit32.band">bit32.band</A><BR>
<A HREF="manual.html#pdf-bit32.bnot">bit32.bnot</A><BR>
<A HREF="manual.html#pdf-bit32.bor">bit32.bor</A><BR>
<A HREF="manual.html#pdf-bit32.btest">bit32.btest</A><BR>
<A HREF="manual.html#pdf-bit32.bxor">bit32.bxor</A><BR>
<A HREF="manual.html#pdf-bit32.extract">bit32.extract</A><BR>
<A HREF="manual.html#pdf-bit32.lrotate">bit32.lrotate</A><BR>
<A HREF="manual.html#pdf-bit32.lshift">bit32.lshift</A><BR>
<A HREF="manual.html#pdf-bit32.replace">bit32.replace</A><BR>
<A HREF="manual.html#pdf-bit32.rrotate">bit32.rrotate</A><BR>
<A HREF="manual.html#pdf-bit32.rshift">bit32.rshift</A><BR>
<P>
<A HREF="manual.html#pdf-coroutine.create">coroutine.create</A><BR>
<A HREF="manual.html#pdf-coroutine.resume">coroutine.resume</A><BR>
<A HREF="manual.html#pdf-coroutine.running">coroutine.running</A><BR>
<A HREF="manual.html#pdf-coroutine.status">coroutine.status</A><BR>
<A HREF="manual.html#pdf-coroutine.wrap">coroutine.wrap</A><BR>
<A HREF="manual.html#pdf-coroutine.yield">coroutine.yield</A><BR>
<P>
<A HREF="manual.html#pdf-debug.debug">debug.debug</A><BR>
<A HREF="manual.html#pdf-debug.getuservalue">debug.getuservalue</A><BR>
<A HREF="manual.html#pdf-debug.gethook">debug.gethook</A><BR>
<A HREF="manual.html#pdf-debug.getinfo">debug.getinfo</A><BR>
<A HREF="manual.html#pdf-debug.getlocal">debug.getlocal</A><BR>
<A HREF="manual.html#pdf-debug.getmetatable">debug.getmetatable</A><BR>
<A HREF="manual.html#pdf-debug.getregistry">debug.getregistry</A><BR>
<A HREF="manual.html#pdf-debug.getupvalue">debug.getupvalue</A><BR>
<A HREF="manual.html#pdf-debug.setuservalue">debug.setuservalue</A><BR>
<A HREF="manual.html#pdf-debug.sethook">debug.sethook</A><BR>
<A HREF="manual.html#pdf-debug.setlocal">debug.setlocal</A><BR>
<A HREF="manual.html#pdf-debug.setmetatable">debug.setmetatable</A><BR>
<A HREF="manual.html#pdf-debug.setupvalue">debug.setupvalue</A><BR>
<A HREF="manual.html#pdf-debug.traceback">debug.traceback</A><BR>
<A HREF="manual.html#pdf-debug.upvalueid">debug.upvalueid</A><BR>
<A HREF="manual.html#pdf-debug.upvaluejoin">debug.upvaluejoin</A><BR>
<P>
<A HREF="manual.html#pdf-file:close">file:close</A><BR>
<A HREF="manual.html#pdf-file:flush">file:flush</A><BR>
<A HREF="manual.html#pdf-file:lines">file:lines</A><BR>
<A HREF="manual.html#pdf-file:read">file:read</A><BR>
<A HREF="manual.html#pdf-file:seek">file:seek</A><BR>
<A HREF="manual.html#pdf-file:setvbuf">file:setvbuf</A><BR>
<A HREF="manual.html#pdf-file:write">file:write</A><BR>
<P>
<A HREF="manual.html#pdf-io.close">io.close</A><BR>
<A HREF="manual.html#pdf-io.flush">io.flush</A><BR>
<A HREF="manual.html#pdf-io.input">io.input</A><BR>
<A HREF="manual.html#pdf-io.lines">io.lines</A><BR>
<A HREF="manual.html#pdf-io.open">io.open</A><BR>
<A HREF="manual.html#pdf-io.output">io.output</A><BR>
<A HREF="manual.html#pdf-io.popen">io.popen</A><BR>
<A HREF="manual.html#pdf-io.read">io.read</A><BR>
<A HREF="manual.html#pdf-io.stderr">io.stderr</A><BR>
<A HREF="manual.html#pdf-io.stdin">io.stdin</A><BR>
<A HREF="manual.html#pdf-io.stdout">io.stdout</A><BR>
<A HREF="manual.html#pdf-io.tmpfile">io.tmpfile</A><BR>
<A HREF="manual.html#pdf-io.type">io.type</A><BR>
<A HREF="manual.html#pdf-io.write">io.write</A><BR>
</TD>
<TD>
<H3>&nbsp;</H3>
<P>
<A HREF="manual.html#pdf-math.abs">math.abs</A><BR>
<A HREF="manual.html#pdf-math.acos">math.acos</A><BR>
<A HREF="manual.html#pdf-math.asin">math.asin</A><BR>
<A HREF="manual.html#pdf-math.atan">math.atan</A><BR>
<A HREF="manual.html#pdf-math.atan2">math.atan2</A><BR>
<A HREF="manual.html#pdf-math.ceil">math.ceil</A><BR>
<A HREF="manual.html#pdf-math.cos">math.cos</A><BR>
<A HREF="manual.html#pdf-math.cosh">math.cosh</A><BR>
<A HREF="manual.html#pdf-math.deg">math.deg</A><BR>
<A HREF="manual.html#pdf-math.exp">math.exp</A><BR>
<A HREF="manual.html#pdf-math.floor">math.floor</A><BR>
<A HREF="manual.html#pdf-math.fmod">math.fmod</A><BR>
<A HREF="manual.html#pdf-math.frexp">math.frexp</A><BR>
<A HREF="manual.html#pdf-math.huge">math.huge</A><BR>
<A HREF="manual.html#pdf-math.ldexp">math.ldexp</A><BR>
<A HREF="manual.html#pdf-math.log">math.log</A><BR>
<A HREF="manual.html#pdf-math.max">math.max</A><BR>
<A HREF="manual.html#pdf-math.min">math.min</A><BR>
<A HREF="manual.html#pdf-math.modf">math.modf</A><BR>
<A HREF="manual.html#pdf-math.pi">math.pi</A><BR>
<A HREF="manual.html#pdf-math.pow">math.pow</A><BR>
<A HREF="manual.html#pdf-math.rad">math.rad</A><BR>
<A HREF="manual.html#pdf-math.random">math.random</A><BR>
<A HREF="manual.html#pdf-math.randomseed">math.randomseed</A><BR>
<A HREF="manual.html#pdf-math.sin">math.sin</A><BR>
<A HREF="manual.html#pdf-math.sinh">math.sinh</A><BR>
<A HREF="manual.html#pdf-math.sqrt">math.sqrt</A><BR>
<A HREF="manual.html#pdf-math.tan">math.tan</A><BR>
<A HREF="manual.html#pdf-math.tanh">math.tanh</A><BR>
<P>
<A HREF="manual.html#pdf-os.clock">os.clock</A><BR>
<A HREF="manual.html#pdf-os.date">os.date</A><BR>
<A HREF="manual.html#pdf-os.difftime">os.difftime</A><BR>
<A HREF="manual.html#pdf-os.execute">os.execute</A><BR>
<A HREF="manual.html#pdf-os.exit">os.exit</A><BR>
<A HREF="manual.html#pdf-os.getenv">os.getenv</A><BR>
<A HREF="manual.html#pdf-os.remove">os.remove</A><BR>
<A HREF="manual.html#pdf-os.rename">os.rename</A><BR>
<A HREF="manual.html#pdf-os.setlocale">os.setlocale</A><BR>
<A HREF="manual.html#pdf-os.time">os.time</A><BR>
<A HREF="manual.html#pdf-os.tmpname">os.tmpname</A><BR>
<P>
<A HREF="manual.html#pdf-package.config">package.config</A><BR>
<A HREF="manual.html#pdf-package.cpath">package.cpath</A><BR>
<A HREF="manual.html#pdf-package.loaded">package.loaded</A><BR>
<A HREF="manual.html#pdf-package.loadlib">package.loadlib</A><BR>
<A HREF="manual.html#pdf-package.path">package.path</A><BR>
<A HREF="manual.html#pdf-package.preload">package.preload</A><BR>
<A HREF="manual.html#pdf-package.searchers">package.searchers</A><BR>
<A HREF="manual.html#pdf-package.searchpath">package.searchpath</A><BR>
<P>
<A HREF="manual.html#pdf-string.byte">string.byte</A><BR>
<A HREF="manual.html#pdf-string.char">string.char</A><BR>
<A HREF="manual.html#pdf-string.dump">string.dump</A><BR>
<A HREF="manual.html#pdf-string.find">string.find</A><BR>
<A HREF="manual.html#pdf-string.format">string.format</A><BR>
<A HREF="manual.html#pdf-string.gmatch">string.gmatch</A><BR>
<A HREF="manual.html#pdf-string.gsub">string.gsub</A><BR>
<A HREF="manual.html#pdf-string.len">string.len</A><BR>
<A HREF="manual.html#pdf-string.lower">string.lower</A><BR>
<A HREF="manual.html#pdf-string.match">string.match</A><BR>
<A HREF="manual.html#pdf-string.rep">string.rep</A><BR>
<A HREF="manual.html#pdf-string.reverse">string.reverse</A><BR>
<A HREF="manual.html#pdf-string.sub">string.sub</A><BR>
<A HREF="manual.html#pdf-string.upper">string.upper</A><BR>
<P>
<A HREF="manual.html#pdf-table.concat">table.concat</A><BR>
<A HREF="manual.html#pdf-table.insert">table.insert</A><BR>
<A HREF="manual.html#pdf-table.pack">table.pack</A><BR>
<A HREF="manual.html#pdf-table.remove">table.remove</A><BR>
<A HREF="manual.html#pdf-table.sort">table.sort</A><BR>
<A HREF="manual.html#pdf-table.unpack">table.unpack</A><BR>
</TD>
<TD>
<H3>C API</H3>
<P>
<A HREF="manual.html#lua_Alloc">lua_Alloc</A><BR>
<A HREF="manual.html#lua_CFunction">lua_CFunction</A><BR>
<A HREF="manual.html#lua_Debug">lua_Debug</A><BR>
<A HREF="manual.html#lua_Hook">lua_Hook</A><BR>
<A HREF="manual.html#lua_Integer">lua_Integer</A><BR>
<A HREF="manual.html#lua_Number">lua_Number</A><BR>
<A HREF="manual.html#lua_Reader">lua_Reader</A><BR>
<A HREF="manual.html#lua_State">lua_State</A><BR>
<A HREF="manual.html#lua_Unsigned">lua_Unsigned</A><BR>
<A HREF="manual.html#lua_Writer">lua_Writer</A><BR>
<P>
<A HREF="manual.html#lua_absindex">lua_absindex</A><BR>
<A HREF="manual.html#lua_arith">lua_arith</A><BR>
<A HREF="manual.html#lua_atpanic">lua_atpanic</A><BR>
<A HREF="manual.html#lua_call">lua_call</A><BR>
<A HREF="manual.html#lua_callk">lua_callk</A><BR>
<A HREF="manual.html#lua_checkstack">lua_checkstack</A><BR>
<A HREF="manual.html#lua_close">lua_close</A><BR>
<A HREF="manual.html#lua_compare">lua_compare</A><BR>
<A HREF="manual.html#lua_concat">lua_concat</A><BR>
<A HREF="manual.html#lua_copy">lua_copy</A><BR>
<A HREF="manual.html#lua_createtable">lua_createtable</A><BR>
<A HREF="manual.html#lua_dump">lua_dump</A><BR>
<A HREF="manual.html#lua_error">lua_error</A><BR>
<A HREF="manual.html#lua_gc">lua_gc</A><BR>
<A HREF="manual.html#lua_getallocf">lua_getallocf</A><BR>
<A HREF="manual.html#lua_getctx">lua_getctx</A><BR>
<A HREF="manual.html#lua_getfield">lua_getfield</A><BR>
<A HREF="manual.html#lua_getglobal">lua_getglobal</A><BR>
<A HREF="manual.html#lua_gethook">lua_gethook</A><BR>
<A HREF="manual.html#lua_gethookcount">lua_gethookcount</A><BR>
<A HREF="manual.html#lua_gethookmask">lua_gethookmask</A><BR>
<A HREF="manual.html#lua_getinfo">lua_getinfo</A><BR>
<A HREF="manual.html#lua_getlocal">lua_getlocal</A><BR>
<A HREF="manual.html#lua_getmetatable">lua_getmetatable</A><BR>
<A HREF="manual.html#lua_getstack">lua_getstack</A><BR>
<A HREF="manual.html#lua_gettable">lua_gettable</A><BR>
<A HREF="manual.html#lua_gettop">lua_gettop</A><BR>
<A HREF="manual.html#lua_getupvalue">lua_getupvalue</A><BR>
<A HREF="manual.html#lua_getuservalue">lua_getuservalue</A><BR>
<A HREF="manual.html#lua_insert">lua_insert</A><BR>
<A HREF="manual.html#lua_isboolean">lua_isboolean</A><BR>
<A HREF="manual.html#lua_iscfunction">lua_iscfunction</A><BR>
<A HREF="manual.html#lua_isfunction">lua_isfunction</A><BR>
<A HREF="manual.html#lua_islightuserdata">lua_islightuserdata</A><BR>
<A HREF="manual.html#lua_isnil">lua_isnil</A><BR>
<A HREF="manual.html#lua_isnone">lua_isnone</A><BR>
<A HREF="manual.html#lua_isnoneornil">lua_isnoneornil</A><BR>
<A HREF="manual.html#lua_isnumber">lua_isnumber</A><BR>
<A HREF="manual.html#lua_isstring">lua_isstring</A><BR>
<A HREF="manual.html#lua_istable">lua_istable</A><BR>
<A HREF="manual.html#lua_isthread">lua_isthread</A><BR>
<A HREF="manual.html#lua_isuserdata">lua_isuserdata</A><BR>
<A HREF="manual.html#lua_len">lua_len</A><BR>
<A HREF="manual.html#lua_load">lua_load</A><BR>
<A HREF="manual.html#lua_newstate">lua_newstate</A><BR>
<A HREF="manual.html#lua_newtable">lua_newtable</A><BR>
<A HREF="manual.html#lua_newthread">lua_newthread</A><BR>
<A HREF="manual.html#lua_newuserdata">lua_newuserdata</A><BR>
<A HREF="manual.html#lua_next">lua_next</A><BR>
<A HREF="manual.html#lua_pcall">lua_pcall</A><BR>
<A HREF="manual.html#lua_pcallk">lua_pcallk</A><BR>
<A HREF="manual.html#lua_pop">lua_pop</A><BR>
<A HREF="manual.html#lua_pushboolean">lua_pushboolean</A><BR>
<A HREF="manual.html#lua_pushcclosure">lua_pushcclosure</A><BR>
<A HREF="manual.html#lua_pushcfunction">lua_pushcfunction</A><BR>
<A HREF="manual.html#lua_pushfstring">lua_pushfstring</A><BR>
<A HREF="manual.html#lua_pushglobaltable">lua_pushglobaltable</A><BR>
<A HREF="manual.html#lua_pushinteger">lua_pushinteger</A><BR>
<A HREF="manual.html#lua_pushlightuserdata">lua_pushlightuserdata</A><BR>
<A HREF="manual.html#lua_pushliteral">lua_pushliteral</A><BR>
<A HREF="manual.html#lua_pushlstring">lua_pushlstring</A><BR>
<A HREF="manual.html#lua_pushnil">lua_pushnil</A><BR>
<A HREF="manual.html#lua_pushnumber">lua_pushnumber</A><BR>
<A HREF="manual.html#lua_pushstring">lua_pushstring</A><BR>
<A HREF="manual.html#lua_pushthread">lua_pushthread</A><BR>
<A HREF="manual.html#lua_pushunsigned">lua_pushunsigned</A><BR>
<A HREF="manual.html#lua_pushvalue">lua_pushvalue</A><BR>
<A HREF="manual.html#lua_pushvfstring">lua_pushvfstring</A><BR>
<A HREF="manual.html#lua_rawequal">lua_rawequal</A><BR>
<A HREF="manual.html#lua_rawget">lua_rawget</A><BR>
<A HREF="manual.html#lua_rawgeti">lua_rawgeti</A><BR>
<A HREF="manual.html#lua_rawgetp">lua_rawgetp</A><BR>
<A HREF="manual.html#lua_rawlen">lua_rawlen</A><BR>
<A HREF="manual.html#lua_rawset">lua_rawset</A><BR>
<A HREF="manual.html#lua_rawseti">lua_rawseti</A><BR>
<A HREF="manual.html#lua_rawsetp">lua_rawsetp</A><BR>
<A HREF="manual.html#lua_register">lua_register</A><BR>
<A HREF="manual.html#lua_remove">lua_remove</A><BR>
<A HREF="manual.html#lua_replace">lua_replace</A><BR>
<A HREF="manual.html#lua_resume">lua_resume</A><BR>
<A HREF="manual.html#lua_setallocf">lua_setallocf</A><BR>
<A HREF="manual.html#lua_setfield">lua_setfield</A><BR>
<A HREF="manual.html#lua_setglobal">lua_setglobal</A><BR>
<A HREF="manual.html#lua_sethook">lua_sethook</A><BR>
<A HREF="manual.html#lua_setlocal">lua_setlocal</A><BR>
<A HREF="manual.html#lua_setmetatable">lua_setmetatable</A><BR>
<A HREF="manual.html#lua_settable">lua_settable</A><BR>
<A HREF="manual.html#lua_settop">lua_settop</A><BR>
<A HREF="manual.html#lua_setupvalue">lua_setupvalue</A><BR>
<A HREF="manual.html#lua_setuservalue">lua_setuservalue</A><BR>
<A HREF="manual.html#lua_status">lua_status</A><BR>
<A HREF="manual.html#lua_toboolean">lua_toboolean</A><BR>
<A HREF="manual.html#lua_tocfunction">lua_tocfunction</A><BR>
<A HREF="manual.html#lua_tointeger">lua_tointeger</A><BR>
<A HREF="manual.html#lua_tointegerx">lua_tointegerx</A><BR>
<A HREF="manual.html#lua_tolstring">lua_tolstring</A><BR>
<A HREF="manual.html#lua_tonumber">lua_tonumber</A><BR>
<A HREF="manual.html#lua_tonumberx">lua_tonumberx</A><BR>
<A HREF="manual.html#lua_topointer">lua_topointer</A><BR>
<A HREF="manual.html#lua_tostring">lua_tostring</A><BR>
<A HREF="manual.html#lua_tothread">lua_tothread</A><BR>
<A HREF="manual.html#lua_tounsigned">lua_tounsigned</A><BR>
<A HREF="manual.html#lua_tounsignedx">lua_tounsignedx</A><BR>
<A HREF="manual.html#lua_touserdata">lua_touserdata</A><BR>
<A HREF="manual.html#lua_type">lua_type</A><BR>
<A HREF="manual.html#lua_typename">lua_typename</A><BR>
<A HREF="manual.html#lua_upvalueid">lua_upvalueid</A><BR>
<A HREF="manual.html#lua_upvalueindex">lua_upvalueindex</A><BR>
<A HREF="manual.html#lua_upvaluejoin">lua_upvaluejoin</A><BR>
<A HREF="manual.html#lua_version">lua_version</A><BR>
<A HREF="manual.html#lua_xmove">lua_xmove</A><BR>
<A HREF="manual.html#lua_yield">lua_yield</A><BR>
<A HREF="manual.html#lua_yieldk">lua_yieldk</A><BR>
</TD>
<TD>
<H3>auxiliary library</H3>
<P>
<A HREF="manual.html#luaL_Buffer">luaL_Buffer</A><BR>
<A HREF="manual.html#luaL_Reg">luaL_Reg</A><BR>
<P>
<A HREF="manual.html#luaL_addchar">luaL_addchar</A><BR>
<A HREF="manual.html#luaL_addlstring">luaL_addlstring</A><BR>
<A HREF="manual.html#luaL_addsize">luaL_addsize</A><BR>
<A HREF="manual.html#luaL_addstring">luaL_addstring</A><BR>
<A HREF="manual.html#luaL_addvalue">luaL_addvalue</A><BR>
<A HREF="manual.html#luaL_argcheck">luaL_argcheck</A><BR>
<A HREF="manual.html#luaL_argerror">luaL_argerror</A><BR>
<A HREF="manual.html#luaL_buffinit">luaL_buffinit</A><BR>
<A HREF="manual.html#luaL_buffinitsize">luaL_buffinitsize</A><BR>
<A HREF="manual.html#luaL_callmeta">luaL_callmeta</A><BR>
<A HREF="manual.html#luaL_checkany">luaL_checkany</A><BR>
<A HREF="manual.html#luaL_checkint">luaL_checkint</A><BR>
<A HREF="manual.html#luaL_checkinteger">luaL_checkinteger</A><BR>
<A HREF="manual.html#luaL_checklong">luaL_checklong</A><BR>
<A HREF="manual.html#luaL_checklstring">luaL_checklstring</A><BR>
<A HREF="manual.html#luaL_checknumber">luaL_checknumber</A><BR>
<A HREF="manual.html#luaL_checkoption">luaL_checkoption</A><BR>
<A HREF="manual.html#luaL_checkstack">luaL_checkstack</A><BR>
<A HREF="manual.html#luaL_checkstring">luaL_checkstring</A><BR>
<A HREF="manual.html#luaL_checktype">luaL_checktype</A><BR>
<A HREF="manual.html#luaL_checkudata">luaL_checkudata</A><BR>
<A HREF="manual.html#luaL_checkunsigned">luaL_checkunsigned</A><BR>
<A HREF="manual.html#luaL_checkversion">luaL_checkversion</A><BR>
<A HREF="manual.html#luaL_dofile">luaL_dofile</A><BR>
<A HREF="manual.html#luaL_dostring">luaL_dostring</A><BR>
<A HREF="manual.html#luaL_error">luaL_error</A><BR>
<A HREF="manual.html#luaL_execresult">luaL_execresult</A><BR>
<A HREF="manual.html#luaL_fileresult">luaL_fileresult</A><BR>
<A HREF="manual.html#luaL_getmetafield">luaL_getmetafield</A><BR>
<A HREF="manual.html#luaL_getmetatable">luaL_getmetatable</A><BR>
<A HREF="manual.html#luaL_getsubtable">luaL_getsubtable</A><BR>
<A HREF="manual.html#luaL_gsub">luaL_gsub</A><BR>
<A HREF="manual.html#luaL_len">luaL_len</A><BR>
<A HREF="manual.html#luaL_loadbuffer">luaL_loadbuffer</A><BR>
<A HREF="manual.html#luaL_loadbufferx">luaL_loadbufferx</A><BR>
<A HREF="manual.html#luaL_loadfile">luaL_loadfile</A><BR>
<A HREF="manual.html#luaL_loadfilex">luaL_loadfilex</A><BR>
<A HREF="manual.html#luaL_loadstring">luaL_loadstring</A><BR>
<A HREF="manual.html#luaL_newlib">luaL_newlib</A><BR>
<A HREF="manual.html#luaL_newlibtable">luaL_newlibtable</A><BR>
<A HREF="manual.html#luaL_newmetatable">luaL_newmetatable</A><BR>
<A HREF="manual.html#luaL_newstate">luaL_newstate</A><BR>
<A HREF="manual.html#luaL_openlibs">luaL_openlibs</A><BR>
<A HREF="manual.html#luaL_optint">luaL_optint</A><BR>
<A HREF="manual.html#luaL_optinteger">luaL_optinteger</A><BR>
<A HREF="manual.html#luaL_optlong">luaL_optlong</A><BR>
<A HREF="manual.html#luaL_optlstring">luaL_optlstring</A><BR>
<A HREF="manual.html#luaL_optnumber">luaL_optnumber</A><BR>
<A HREF="manual.html#luaL_optstring">luaL_optstring</A><BR>
<A HREF="manual.html#luaL_optunsigned">luaL_optunsigned</A><BR>
<A HREF="manual.html#luaL_prepbuffer">luaL_prepbuffer</A><BR>
<A HREF="manual.html#luaL_prepbuffsize">luaL_prepbuffsize</A><BR>
<A HREF="manual.html#luaL_pushresult">luaL_pushresult</A><BR>
<A HREF="manual.html#luaL_pushresultsize">luaL_pushresultsize</A><BR>
<A HREF="manual.html#luaL_ref">luaL_ref</A><BR>
<A HREF="manual.html#luaL_requiref">luaL_requiref</A><BR>
<A HREF="manual.html#luaL_setfuncs">luaL_setfuncs</A><BR>
<A HREF="manual.html#luaL_setmetatable">luaL_setmetatable</A><BR>
<A HREF="manual.html#luaL_testudata">luaL_testudata</A><BR>
<A HREF="manual.html#luaL_tolstring">luaL_tolstring</A><BR>
<A HREF="manual.html#luaL_traceback">luaL_traceback</A><BR>
<A HREF="manual.html#luaL_typename">luaL_typename</A><BR>
<A HREF="manual.html#luaL_unref">luaL_unref</A><BR>
<A HREF="manual.html#luaL_where">luaL_where</A><BR>
</TD>
</TR>
</TABLE>
<HR>
<SMALL CLASS="footer">
Last update:
Tue Mar 12 11:22:18 BRT 2013
</SMALL>
<!--
Last change: revised for Lua 5.2.2
-->
</BODY>
</HTML>

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.\" $Id: lua.man,v 1.13 2011/11/16 17:16:53 lhf Exp $
.TH LUA 1 "$Date: 2011/11/16 17:16:53 $"
.SH NAME
lua \- Lua interpreter
.SH SYNOPSIS
.B lua
[
.I options
]
[
.I script
[
.I args
]
]
.SH DESCRIPTION
.B lua
is the standalone Lua interpreter.
It loads and executes Lua programs,
either in textual source form or
in precompiled binary form.
(Precompiled binaries are output by
.BR luac ,
the Lua compiler.)
.B lua
can be used as a batch interpreter and also interactively.
.LP
The given
.I options
are handled in order and then
the Lua program in file
.I script
is loaded and executed.
The given
.I args
are available to
.I script
as strings in a global table named
.BR arg .
If no options or arguments are given,
then
.B "\-v \-i"
is assumed when the standard input is a terminal;
otherwise,
.B "\-"
is assumed.
.LP
In interactive mode,
.B lua
prompts the user,
reads lines from the standard input,
and executes them as they are read.
If a line does not contain a complete statement,
then a secondary prompt is displayed and
lines are read until a complete statement is formed or
a syntax error is found.
If a line starts with
.BR '=' ,
then
.B lua
evaluates and displays
the values of the expressions in the remainder of the line.
.LP
At the very start,
before even handling the command line,
.B lua
checks the contents of the environment variables
.B LUA_INIT_5_2
or
.BR LUA_INIT ,
in that order.
If the contents is of the form
.RI '@ filename ',
then
.I filename
is executed.
Otherwise, the string is assumed to be a Lua statement and is executed.
.SH OPTIONS
.TP
.BI \-e " stat"
execute statement
.IR stat .
.TP
.B \-i
enter interactive mode after executing
.IR script .
.TP
.BI \-l " name"
execute the equivalent of
.IB name =require(' name ')
before executing
.IR script .
.TP
.B \-v
show version information.
.TP
.B \-E
ignore environment variables.
.TP
.B \-\-
stop handling options.
.TP
.B \-
stop handling options and execute the standard input as a file.
.SH "SEE ALSO"
.BR luac (1)
.br
The documentation at lua.org,
especially section 7 of the reference manual.
.SH DIAGNOSTICS
Error messages should be self explanatory.
.SH AUTHORS
R. Ierusalimschy,
L. H. de Figueiredo,
W. Celes
.\" EOF

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}
body {
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padding: 26px ;
margin: 16px ;
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background-color: #FFFFFF ;
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text-align: justify ;
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h1, h2, h3, h4 {
font-family: Verdana, Geneva, sans-serif ;
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font-style: normal ;
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h2 {
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table h3 {
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a:link {
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a:visited {
background-color: inherit ;
text-decoration: none ;
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a:link:hover, a:visited:hover {
color: #000080 ;
background-color: #D0D0FF ;
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a:link:active, a:visited:active {
color: #FF0000 ;
}
hr {
border: 0 ;
height: 1px ;
color: #a0a0a0 ;
background-color: #a0a0a0 ;
display: none ;
}
table hr {
display: block ;
}
:target {
background-color: #F8F8F8 ;
padding: 8px ;
border: solid #a0a0a0 2px ;
border-radius: 8px ;
}
.footer {
color: gray ;
font-size: x-small ;
}
input[type=text] {
border: solid #a0a0a0 2px ;
border-radius: 2em ;
-moz-border-radius: 2em ;
background-image: url('images/search.png') ;
background-repeat: no-repeat;
background-position: 4px center ;
padding-left: 20px ;
height: 2em ;
}

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.\" $Id: luac.man,v 1.29 2011/11/16 13:53:40 lhf Exp $
.TH LUAC 1 "$Date: 2011/11/16 13:53:40 $"
.SH NAME
luac \- Lua compiler
.SH SYNOPSIS
.B luac
[
.I options
] [
.I filenames
]
.SH DESCRIPTION
.B luac
is the Lua compiler.
It translates programs written in the Lua programming language
into binary files containing precompiled chunks
that can be later loaded and executed.
.LP
The main advantages of precompiling chunks are:
faster loading,
protecting source code from accidental user changes,
and
off-line syntax checking.
Precompiling does not imply faster execution
because in Lua chunks are always compiled into bytecodes before being executed.
.B luac
simply allows those bytecodes to be saved in a file for later execution.
Precompiled chunks are not necessarily smaller than the corresponding source.
The main goal in precompiling is faster loading.
.LP
In the command line,
you can mix
text files containing Lua source and
binary files containing precompiled chunks.
.B luac
produces a single output file containing the combined bytecodes
for all files given.
Executing the combined file is equivalent to executing the given files.
By default,
the output file is named
.BR luac.out ,
but you can change this with the
.B \-o
option.
.LP
Precompiled chunks are
.I not
portable across different architectures.
Moreover,
the internal format of precompiled chunks
is likely to change when a new version of Lua is released.
Make sure you save the source files of all Lua programs that you precompile.
.LP
.SH OPTIONS
.TP
.B \-l
produce a listing of the compiled bytecode for Lua's virtual machine.
Listing bytecodes is useful to learn about Lua's virtual machine.
If no files are given, then
.B luac
loads
.B luac.out
and lists its contents.
Use
.B \-l \-l
for a full listing.
.TP
.BI \-o " file"
output to
.IR file ,
instead of the default
.BR luac.out .
(You can use
.B "'\-'"
for standard output,
but not on platforms that open standard output in text mode.)
The output file may be one of the given files because
all files are loaded before the output file is written.
Be careful not to overwrite precious files.
.TP
.B \-p
load files but do not generate any output file.
Used mainly for syntax checking and for testing precompiled chunks:
corrupted files will probably generate errors when loaded.
If no files are given, then
.B luac
loads
.B luac.out
and tests its contents.
No messages are displayed if the file loads without errors.
.TP
.B \-s
strip debug information before writing the output file.
This saves some space in very large chunks,
but if errors occur when running a stripped chunk,
then the error messages may not contain the full information they usually do.
In particular,
line numbers and names of local variables are lost.
.TP
.B \-v
show version information.
.TP
.B \-\-
stop handling options.
.TP
.B \-
stop handling options and process standard input.
.SH "SEE ALSO"
.BR lua (1)
.br
The documentation at lua.org.
.SH DIAGNOSTICS
Error messages should be self explanatory.
.SH AUTHORS
R. Ierusalimschy,
L. H. de Figueiredo,
W. Celes
.\" EOF

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padding-bottom: 0.4em ;
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<HTML>
<HEAD>
<TITLE>Lua 5.2 readme</TITLE>
<LINK REL="stylesheet" TYPE="text/css" HREF="lua.css">
<META HTTP-EQUIV="content-type" CONTENT="text/html; charset=iso-8859-1">
<STYLE TYPE="text/css">
blockquote, .display {
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dl.display dd {
padding-bottom: 0.2em ;
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tt, kbd, code {
font-size: 12pt ;
}
</STYLE>
</HEAD>
<BODY>
<HR>
<H1>
<A HREF="http://www.lua.org/"><IMG SRC="logo.gif" ALT="Lua" BORDER=0></A>
Welcome to Lua 5.2
</H1>
<P>
<A HREF="#about">about</A>
&middot;
<A HREF="#install">installation</A>
&middot;
<A HREF="#changes">changes</A>
&middot;
<A HREF="#license">license</A>
&middot;
<A HREF="contents.html">reference manual</A>
<H2><A NAME="about">About Lua</A></H2>
<P>
Lua is a powerful, fast, lightweight, embeddable scripting language
developed by a
<A HREF="http://www.lua.org/authors.html">team</A>
at
<A HREF="http://www.puc-rio.br/">PUC-Rio</A>,
the Pontifical Catholic University of Rio de Janeiro in Brazil.
Lua is
<A HREF="#license">free software</A>
used in many products and projects around the world.
<P>
Lua's
<A HREF="http://www.lua.org/">official web site</A>
provides complete information
about Lua,
including
an
<A HREF="http://www.lua.org/about.html">executive summary</A>
and
updated
<A HREF="http://www.lua.org/docs.html">documentation</A>,
especially the
<A HREF="http://www.lua.org/manual/5.2/">reference manual</A>,
which may differ slightly from the
<A HREF="contents.html">local copy</A>
distributed in this package.
<H2><A NAME="install">Installing Lua</A></H2>
<P>
Lua is distributed in
<A HREF="http://www.lua.org/ftp/">source</A>
form.
You need to build it before using it.
Building Lua should be straightforward
because
Lua is implemented in pure ANSI C and compiles unmodified in all known
platforms that have an ANSI C compiler.
Lua also compiles unmodified as C++.
The instructions given below for building Lua are for Unix-like platforms.
See also
<A HREF="#other">instructions for other systems</A>
and
<A HREF="#customization">customization options</A>.
<P>
If you don't have the time or the inclination to compile Lua yourself,
get a binary from
<A HREF="http://lua-users.org/wiki/LuaBinaries">LuaBinaries</A>.
Try also
<A HREF="http://luaforwindows.luaforge.net/">Lua for Windows</A>,
an easy-to-use distribution of Lua that includes many useful libraries.
<H3>Building Lua</H3>
<P>
In most Unix-like platforms, simply do "<KBD>make</KBD>" with a suitable target.
Here are the details.
<OL>
<LI>
Open a terminal window and move to
the top-level directory, which is named <TT>lua-5.2.3</TT>.
The Makefile there controls both the build process and the installation process.
<P>
<LI>
Do "<KBD>make</KBD>" and see if your platform is listed.
The platforms currently supported are:
<P>
<P CLASS="display">
aix ansi bsd freebsd generic linux macosx mingw posix solaris
</P>
<P>
If your platform is listed, just do "<KBD>make xxx</KBD>", where xxx
is your platform name.
<P>
If your platform is not listed, try the closest one or posix, generic,
ansi, in this order.
<P>
<LI>
The compilation takes only a few moments
and produces three files in the <TT>src</TT> directory:
lua (the interpreter),
luac (the compiler),
and liblua.a (the library).
<P>
<LI>
To check that Lua has been built correctly, do "<KBD>make test</KBD>"
after building Lua. This will run the interpreter and print its version string.
</OL>
<P>
If you're running Linux and get compilation errors,
make sure you have installed the <TT>readline</TT> development package.
If you get link errors after that,
then try "<KBD>make linux MYLIBS=-ltermcap</KBD>".
<H3>Installing Lua</H3>
<P>
Once you have built Lua, you may want to install it in an official
place in your system. In this case, do "<KBD>make install</KBD>". The official
place and the way to install files are defined in the Makefile. You'll
probably need the right permissions to install files.
<P>
To build and install Lua in one step, do "<KBD>make xxx install</KBD>",
where xxx is your platform name.
<P>
To install Lua locally, do "<KBD>make local</KBD>".
This will create a directory <TT>install</TT> with subdirectories
<TT>bin</TT>, <TT>include</TT>, <TT>lib</TT>, <TT>man</TT>,
and install Lua as listed below.
To install Lua locally, but in some other directory, do
"<KBD>make install INSTALL_TOP=xxx</KBD>", where xxx is your chosen directory.
<DL CLASS="display">
<DT>
bin:
<DD>
lua luac
<DT>
include:
<DD>
lua.h luaconf.h lualib.h lauxlib.h lua.hpp
<DT>
lib:
<DD>
liblua.a
<DT>
man/man1:
<DD>
lua.1 luac.1
</DL>
<P>
These are the only directories you need for development.
If you only want to run Lua programs,
you only need the files in bin and man.
The files in include and lib are needed for
embedding Lua in C or C++ programs.
<H3><A NAME="customization">Customization</A></H3>
<P>
Three kinds of things can be customized by editing a file:
<UL>
<LI> Where and how to install Lua &mdash; edit <TT>Makefile</TT>.
<LI> How to build Lua &mdash; edit <TT>src/Makefile</TT>.
<LI> Lua features &mdash; edit <TT>src/luaconf.h</TT>.
</UL>
<P>
You don't actually need to edit the Makefiles because you may set the
relevant variables in the command line when invoking make.
Nevertheless, it's probably best to edit and save the Makefiles to
record the changes you need.
<P>
On the other hand, if you need to customize some Lua features, you'll need
to edit <TT>src/luaconf.h</TT> before building and installing Lua.
The edited file will be the one installed, and
it will be used by any Lua clients that you build, to ensure consistency.
Further customization is available to experts by editing the Lua sources.
<P>
We strongly recommend that you enable dynamic loading in <TT>src/luaconf.h</TT>.
This is done automatically for all platforms listed above that have
this feature and also for Windows.
<H3><A NAME="other">Building Lua on other systems</A></H3>
<P>
If you're not using the usual Unix tools, then the instructions for
building Lua depend on the compiler you use. You'll need to create
projects (or whatever your compiler uses) for building the library,
the interpreter, and the compiler, as follows:
<DL CLASS="display">
<DT>
library:
<DD>
lapi.c lcode.c lctype.c ldebug.c ldo.c ldump.c lfunc.c lgc.c llex.c
lmem.c lobject.c lopcodes.c lparser.c lstate.c lstring.c ltable.c
ltm.c lundump.c lvm.c lzio.c
lauxlib.c lbaselib.c lbitlib.c lcorolib.c ldblib.c liolib.c
lmathlib.c loslib.c lstrlib.c ltablib.c loadlib.c linit.c
<DT>
interpreter:
<DD>
library, lua.c
<DT>
compiler:
<DD>
library, luac.c
</DL>
<P>
To use Lua as a library in your own programs you'll need to know how to
create and use libraries with your compiler. Moreover, to dynamically load
C libraries for Lua you'll need to know how to create dynamic libraries
and you'll need to make sure that the Lua API functions are accessible to
those dynamic libraries &mdash; but <EM>don't</EM> link the Lua library
into each dynamic library. For Unix, we recommend that the Lua library
be linked statically into the host program and its symbols exported for
dynamic linking; <TT>src/Makefile</TT> does this for the Lua interpreter.
For Windows, we recommend that the Lua library be a DLL.
<P>
As mentioned above, you may edit <TT>src/luaconf.h</TT> to customize
some features before building Lua.
<H2><A NAME="changes">Changes since Lua 5.1</A></H2>
<P>
Here are the main changes introduced in Lua 5.2.
The
<A HREF="contents.html">reference manual</A>
lists the
<A HREF="manual.html#8">incompatibilities</A> that had to be introduced.
<H3>Main changes</H3>
<UL>
<LI> yieldable pcall and metamethods
<LI> new lexical scheme for globals
<LI> ephemeron tables
<LI> new library for bitwise operations
<LI> light C functions
<LI> emergency garbage collector
<LI> <CODE>goto</CODE> statement
<LI> finalizers for tables
</UL>
Here are the other changes introduced in Lua 5.2:
<H3>Language</H3>
<UL>
<LI> no more fenv for threads or functions
<LI> tables honor the <CODE>__len</CODE> metamethod
<LI> hex and <CODE>\z</CODE> escapes in strings
<LI> support for hexadecimal floats
<LI> order metamethods work for different types
<LI> no more verification of opcode consistency
<LI> hook event "tail return" replaced by "tail call"
<LI> empty statement
<LI> <CODE>break</CODE> statement may appear in the middle of a block
</UL>
<H3>Libraries</H3>
<UL>
<LI> arguments for function called through <CODE>xpcall</CODE>
<LI> optional 'mode' argument to load and loadfile (to control binary x text)
<LI> optional 'env' argument to load and loadfile (environment for loaded chunk)
<LI> <CODE>loadlib</CODE> may load libraries with global names (RTLD_GLOBAL)
<LI> new function <CODE>package.searchpath</CODE>
<LI> modules receive their paths when loaded
<LI> optional base in <CODE>math.log</CODE>
<LI> optional separator in <CODE>string.rep</CODE>
<LI> <CODE>file:write</CODE> returns <CODE>file</CODE>
<LI> closing a pipe returns exit status
<LI> <CODE>os.exit</CODE> may close state
<LI> new metamethods <CODE>__pairs</CODE> and <CODE>__ipairs</CODE>
<LI> new option 'isrunning' for <CODE>collectgarbage</CODE> and <CODE>lua_gc</CODE>
<LI> frontier patterns
<LI> <CODE>\0</CODE> in patterns
<LI> new option <CODE>*L</CODE> for <CODE>io.read</CODE>
<LI> options for <CODE>io.lines</CODE>
<LI> <CODE>debug.getlocal</CODE> can access function varargs
</UL>
<H3>C API</H3>
<UL>
<LI> main thread predefined in the registry
<LI> new functions
<CODE>lua_absindex</CODE>,
<CODE>lua_arith</CODE>,
<CODE>lua_compare</CODE>,
<CODE>lua_copy</CODE>,
<CODE>lua_len</CODE>,
<CODE>lua_rawgetp</CODE>,
<CODE>lua_rawsetp</CODE>,
<CODE>lua_upvalueid</CODE>,
<CODE>lua_upvaluejoin</CODE>,
<CODE>lua_version</CODE>.
<LI> new functions
<CODE>luaL_checkversion</CODE>,
<CODE>luaL_setmetatable</CODE>,
<CODE>luaL_testudata</CODE>,
<CODE>luaL_tolstring</CODE>.
<LI> <CODE>lua_pushstring</CODE> and <CODE>pushlstring</CODE> return string
<LI> <CODE>nparams</CODE> and <CODE>isvararg</CODE> available in debug API
<LI> new <CODE>lua_Unsigned</CODE>
</UL>
<H3>Implementation</H3>
<UL>
<LI> max constants per function raised to 2<SUP>26</SUP>
<LI> generational mode for garbage collection (experimental)
<LI> NaN trick (experimental)
<LI> internal (immutable) version of ctypes
<LI> simpler implementation for string buffers
<LI> parser uses much less C-stack space (no more auto arrays)
</UL>
<H3>Lua standalone interpreter</H3>
<UL>
<LI> new <CODE>-E</CODE> option to avoid environment variables
<LI> handling of non-string error messages
</UL>
<H2><A NAME="license">License</A></H2>
<A HREF="http://www.opensource.org/docs/definition.php">
<IMG SRC="osi-certified-72x60.png" ALIGN="right" BORDER="0" ALT="[osi certified]" STYLE="padding-left: 30px ;">
</A>
<P>
Lua is free software distributed under the terms of the
<A HREF="http://www.opensource.org/licenses/mit-license.html">MIT license</A>
reproduced below;
it may be used for any purpose, including commercial purposes,
at absolutely no cost without having to ask us.
The only requirement is that if you do use Lua,
then you should give us credit by including the appropriate copyright notice somewhere in your product or its documentation.
For details, see
<A HREF="http://www.lua.org/license.html">this</A>.
<BLOCKQUOTE STYLE="padding-bottom: 0em">
Copyright &copy; 1994&ndash;2013 Lua.org, PUC-Rio.
<P>
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
<P>
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
<P>
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
</BLOCKQUOTE>
<P>
<HR>
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Last update:
Sat Nov 9 22:39:16 BRST 2013
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