<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <link rel="stylesheet" href="style.css" type="text/css"> <meta content="text/html; charset=iso-8859-1" http-equiv="Content-Type"> <link rel="Start" href="index.html"> <link rel="previous" href="Mutex.html"> <link rel="next" href="Num.html"> <link rel="Up" href="index.html"> <link title="Index of types" rel=Appendix href="index_types.html"> <link title="Index of exceptions" rel=Appendix href="index_exceptions.html"> <link title="Index of values" rel=Appendix href="index_values.html"> <link title="Index of modules" rel=Appendix href="index_modules.html"> <link title="Index of module types" rel=Appendix href="index_module_types.html"> <link title="Arg" rel="Chapter" href="Arg.html"> <link title="Arith_status" rel="Chapter" href="Arith_status.html"> <link title="Array" rel="Chapter" href="Array.html"> <link title="ArrayLabels" rel="Chapter" href="ArrayLabels.html"> <link title="Big_int" rel="Chapter" href="Big_int.html"> <link title="Bigarray" rel="Chapter" href="Bigarray.html"> <link title="Buffer" rel="Chapter" href="Buffer.html"> <link title="Callback" rel="Chapter" href="Callback.html"> <link title="CamlinternalLazy" rel="Chapter" href="CamlinternalLazy.html"> <link title="CamlinternalMod" rel="Chapter" href="CamlinternalMod.html"> <link title="CamlinternalOO" rel="Chapter" href="CamlinternalOO.html"> <link title="Char" rel="Chapter" href="Char.html"> <link title="Complex" rel="Chapter" href="Complex.html"> <link title="Condition" rel="Chapter" href="Condition.html"> <link title="Dbm" rel="Chapter" href="Dbm.html"> <link title="Digest" rel="Chapter" href="Digest.html"> <link title="Dynlink" rel="Chapter" href="Dynlink.html"> <link title="Event" rel="Chapter" href="Event.html"> <link title="Filename" rel="Chapter" href="Filename.html"> <link title="Format" rel="Chapter" href="Format.html"> <link title="Gc" rel="Chapter" href="Gc.html"> <link title="Genlex" rel="Chapter" href="Genlex.html"> <link title="Graphics" rel="Chapter" href="Graphics.html"> <link title="GraphicsX11" rel="Chapter" href="GraphicsX11.html"> <link title="Hashtbl" rel="Chapter" href="Hashtbl.html"> <link title="Int32" rel="Chapter" href="Int32.html"> <link title="Int64" rel="Chapter" href="Int64.html"> <link title="Lazy" rel="Chapter" href="Lazy.html"> <link title="Lexing" rel="Chapter" href="Lexing.html"> <link title="List" rel="Chapter" href="List.html"> <link title="ListLabels" rel="Chapter" href="ListLabels.html"> <link title="Map" rel="Chapter" href="Map.html"> <link title="Marshal" rel="Chapter" href="Marshal.html"> <link title="MoreLabels" rel="Chapter" href="MoreLabels.html"> <link title="Mutex" rel="Chapter" href="Mutex.html"> <link title="Nativeint" rel="Chapter" href="Nativeint.html"> <link title="Num" rel="Chapter" href="Num.html"> <link title="Obj" rel="Chapter" href="Obj.html"> <link title="Oo" rel="Chapter" href="Oo.html"> <link title="Parsing" rel="Chapter" href="Parsing.html"> <link title="Pervasives" rel="Chapter" href="Pervasives.html"> <link title="Printexc" rel="Chapter" href="Printexc.html"> <link title="Printf" rel="Chapter" href="Printf.html"> <link title="Queue" rel="Chapter" href="Queue.html"> <link title="Random" rel="Chapter" href="Random.html"> <link title="Scanf" rel="Chapter" href="Scanf.html"> <link title="Set" rel="Chapter" href="Set.html"> <link title="Sort" rel="Chapter" href="Sort.html"> <link title="Stack" rel="Chapter" href="Stack.html"> <link title="StdLabels" rel="Chapter" href="StdLabels.html"> <link title="Str" rel="Chapter" href="Str.html"> <link title="Stream" rel="Chapter" href="Stream.html"> <link title="String" rel="Chapter" href="String.html"> <link title="StringLabels" rel="Chapter" href="StringLabels.html"> <link title="Sys" rel="Chapter" href="Sys.html"> <link title="Thread" rel="Chapter" href="Thread.html"> <link title="ThreadUnix" rel="Chapter" href="ThreadUnix.html"> <link title="Tk" rel="Chapter" href="Tk.html"> <link title="Unix" rel="Chapter" href="Unix.html"> <link title="UnixLabels" rel="Chapter" href="UnixLabels.html"> <link title="Weak" rel="Chapter" href="Weak.html"><title>Nativeint</title> </head> <body> <div class="navbar"><a href="Mutex.html">Previous</a> <a href="index.html">Up</a> <a href="Num.html">Next</a> </div> <center><h1>Module <a href="type_Nativeint.html">Nativeint</a></h1></center> <br> <pre><span class="keyword">module</span> Nativeint: <code class="code"><span class="keyword">sig</span></code> <a href="Nativeint.html">..</a> <code class="code"><span class="keyword">end</span></code></pre>Processor-native integers. <p> This module provides operations on the type <code class="code">nativeint</code> of signed 32-bit integers (on 32-bit platforms) or signed 64-bit integers (on 64-bit platforms). This integer type has exactly the same width as that of a <code class="code">long</code> integer type in the C compiler. All arithmetic operations over <code class="code">nativeint</code> are taken modulo 2<sup class="superscript">32</sup> or 2<sup class="superscript">64</sup> depending on the word size of the architecture. <p> Performance notice: values of type <code class="code">nativeint</code> occupy more memory space than values of type <code class="code">int</code>, and arithmetic operations on <code class="code">nativeint</code> are generally slower than those on <code class="code">int</code>. Use <code class="code">nativeint</code> only when the application requires the extra bit of precision over the <code class="code">int</code> type.<br> <hr width="100%"> <pre><span id="VALzero"><span class="keyword">val</span> zero</span> : <code class="type">nativeint</code></pre><div class="info"> The native integer 0.<br> </div> <pre><span id="VALone"><span class="keyword">val</span> one</span> : <code class="type">nativeint</code></pre><div class="info"> The native integer 1.<br> </div> <pre><span id="VALminus_one"><span class="keyword">val</span> minus_one</span> : <code class="type">nativeint</code></pre><div class="info"> The native integer -1.<br> </div> <pre><span id="VALneg"><span class="keyword">val</span> neg</span> : <code class="type">nativeint -> nativeint</code></pre><div class="info"> Unary negation.<br> </div> <pre><span id="VALadd"><span class="keyword">val</span> add</span> : <code class="type">nativeint -> nativeint -> nativeint</code></pre><div class="info"> Addition.<br> </div> <pre><span id="VALsub"><span class="keyword">val</span> sub</span> : <code class="type">nativeint -> nativeint -> nativeint</code></pre><div class="info"> Subtraction.<br> </div> <pre><span id="VALmul"><span class="keyword">val</span> mul</span> : <code class="type">nativeint -> nativeint -> nativeint</code></pre><div class="info"> Multiplication.<br> </div> <pre><span id="VALdiv"><span class="keyword">val</span> div</span> : <code class="type">nativeint -> nativeint -> nativeint</code></pre><div class="info"> Integer division. Raise <code class="code"><span class="constructor">Division_by_zero</span></code> if the second argument is zero. This division rounds the real quotient of its arguments towards zero, as specified for <a href="Pervasives.html#VAL(/)"><code class="code">(/)</code></a>.<br> </div> <pre><span id="VALrem"><span class="keyword">val</span> rem</span> : <code class="type">nativeint -> nativeint -> nativeint</code></pre><div class="info"> Integer remainder. If <code class="code">y</code> is not zero, the result of <code class="code"><span class="constructor">Nativeint</span>.rem x y</code> satisfies the following properties: <code class="code"><span class="constructor">Nativeint</span>.zero <= <span class="constructor">Nativeint</span>.rem x y < <span class="constructor">Nativeint</span>.abs y</code> and <code class="code">x = <span class="constructor">Nativeint</span>.add (<span class="constructor">Nativeint</span>.mul (<span class="constructor">Nativeint</span>.div x y) y) (<span class="constructor">Nativeint</span>.rem x y)</code>. If <code class="code">y = 0</code>, <code class="code"><span class="constructor">Nativeint</span>.rem x y</code> raises <code class="code"><span class="constructor">Division_by_zero</span></code>.<br> </div> <pre><span id="VALsucc"><span class="keyword">val</span> succ</span> : <code class="type">nativeint -> nativeint</code></pre><div class="info"> Successor. <code class="code"><span class="constructor">Nativeint</span>.succ x</code> is <code class="code"><span class="constructor">Nativeint</span>.add x <span class="constructor">Nativeint</span>.one</code>.<br> </div> <pre><span id="VALpred"><span class="keyword">val</span> pred</span> : <code class="type">nativeint -> nativeint</code></pre><div class="info"> Predecessor. <code class="code"><span class="constructor">Nativeint</span>.pred x</code> is <code class="code"><span class="constructor">Nativeint</span>.sub x <span class="constructor">Nativeint</span>.one</code>.<br> </div> <pre><span id="VALabs"><span class="keyword">val</span> abs</span> : <code class="type">nativeint -> nativeint</code></pre><div class="info"> Return the absolute value of its argument.<br> </div> <pre><span id="VALsize"><span class="keyword">val</span> size</span> : <code class="type">int</code></pre><div class="info"> The size in bits of a native integer. This is equal to <code class="code">32</code> on a 32-bit platform and to <code class="code">64</code> on a 64-bit platform.<br> </div> <pre><span id="VALmax_int"><span class="keyword">val</span> max_int</span> : <code class="type">nativeint</code></pre><div class="info"> The greatest representable native integer, either 2<sup class="superscript">31</sup> - 1 on a 32-bit platform, or 2<sup class="superscript">63</sup> - 1 on a 64-bit platform.<br> </div> <pre><span id="VALmin_int"><span class="keyword">val</span> min_int</span> : <code class="type">nativeint</code></pre><div class="info"> The greatest representable native integer, either -2<sup class="superscript">31</sup> on a 32-bit platform, or -2<sup class="superscript">63</sup> on a 64-bit platform.<br> </div> <pre><span id="VALlogand"><span class="keyword">val</span> logand</span> : <code class="type">nativeint -> nativeint -> nativeint</code></pre><div class="info"> Bitwise logical and.<br> </div> <pre><span id="VALlogor"><span class="keyword">val</span> logor</span> : <code class="type">nativeint -> nativeint -> nativeint</code></pre><div class="info"> Bitwise logical or.<br> </div> <pre><span id="VALlogxor"><span class="keyword">val</span> logxor</span> : <code class="type">nativeint -> nativeint -> nativeint</code></pre><div class="info"> Bitwise logical exclusive or.<br> </div> <pre><span id="VALlognot"><span class="keyword">val</span> lognot</span> : <code class="type">nativeint -> nativeint</code></pre><div class="info"> Bitwise logical negation<br> </div> <pre><span id="VALshift_left"><span class="keyword">val</span> shift_left</span> : <code class="type">nativeint -> int -> nativeint</code></pre><div class="info"> <code class="code"><span class="constructor">Nativeint</span>.shift_left x y</code> shifts <code class="code">x</code> to the left by <code class="code">y</code> bits. The result is unspecified if <code class="code">y < 0</code> or <code class="code">y >= bitsize</code>, where <code class="code">bitsize</code> is <code class="code">32</code> on a 32-bit platform and <code class="code">64</code> on a 64-bit platform.<br> </div> <pre><span id="VALshift_right"><span class="keyword">val</span> shift_right</span> : <code class="type">nativeint -> int -> nativeint</code></pre><div class="info"> <code class="code"><span class="constructor">Nativeint</span>.shift_right x y</code> shifts <code class="code">x</code> to the right by <code class="code">y</code> bits. This is an arithmetic shift: the sign bit of <code class="code">x</code> is replicated and inserted in the vacated bits. The result is unspecified if <code class="code">y < 0</code> or <code class="code">y >= bitsize</code>.<br> </div> <pre><span id="VALshift_right_logical"><span class="keyword">val</span> shift_right_logical</span> : <code class="type">nativeint -> int -> nativeint</code></pre><div class="info"> <code class="code"><span class="constructor">Nativeint</span>.shift_right_logical x y</code> shifts <code class="code">x</code> to the right by <code class="code">y</code> bits. This is a logical shift: zeroes are inserted in the vacated bits regardless of the sign of <code class="code">x</code>. The result is unspecified if <code class="code">y < 0</code> or <code class="code">y >= bitsize</code>.<br> </div> <pre><span id="VALof_int"><span class="keyword">val</span> of_int</span> : <code class="type">int -> nativeint</code></pre><div class="info"> Convert the given integer (type <code class="code">int</code>) to a native integer (type <code class="code">nativeint</code>).<br> </div> <pre><span id="VALto_int"><span class="keyword">val</span> to_int</span> : <code class="type">nativeint -> int</code></pre><div class="info"> Convert the given native integer (type <code class="code">nativeint</code>) to an integer (type <code class="code">int</code>). The high-order bit is lost during the conversion.<br> </div> <pre><span id="VALof_float"><span class="keyword">val</span> of_float</span> : <code class="type">float -> nativeint</code></pre><div class="info"> Convert the given floating-point number to a native integer, discarding the fractional part (truncate towards 0). The result of the conversion is undefined if, after truncation, the number is outside the range [<a href="Nativeint.html#VALmin_int"><code class="code"><span class="constructor">Nativeint</span>.min_int</code></a>, <a href="Nativeint.html#VALmax_int"><code class="code"><span class="constructor">Nativeint</span>.max_int</code></a>].<br> </div> <pre><span id="VALto_float"><span class="keyword">val</span> to_float</span> : <code class="type">nativeint -> float</code></pre><div class="info"> Convert the given native integer to a floating-point number.<br> </div> <pre><span id="VALof_int32"><span class="keyword">val</span> of_int32</span> : <code class="type">int32 -> nativeint</code></pre><div class="info"> Convert the given 32-bit integer (type <code class="code">int32</code>) to a native integer.<br> </div> <pre><span id="VALto_int32"><span class="keyword">val</span> to_int32</span> : <code class="type">nativeint -> int32</code></pre><div class="info"> Convert the given native integer to a 32-bit integer (type <code class="code">int32</code>). On 64-bit platforms, the 64-bit native integer is taken modulo 2<sup class="superscript">32</sup>, i.e. the top 32 bits are lost. On 32-bit platforms, the conversion is exact.<br> </div> <pre><span id="VALof_string"><span class="keyword">val</span> of_string</span> : <code class="type">string -> nativeint</code></pre><div class="info"> Convert the given string to a native integer. The string is read in decimal (by default) or in hexadecimal, octal or binary if the string begins with <code class="code">0x</code>, <code class="code">0o</code> or <code class="code">0b</code> respectively. Raise <code class="code"><span class="constructor">Failure</span> <span class="string">"int_of_string"</span></code> if the given string is not a valid representation of an integer, or if the integer represented exceeds the range of integers representable in type <code class="code">nativeint</code>.<br> </div> <pre><span id="VALto_string"><span class="keyword">val</span> to_string</span> : <code class="type">nativeint -> string</code></pre><div class="info"> Return the string representation of its argument, in decimal.<br> </div> <pre><span id="TYPEt"><span class="keyword">type</span> <code class="type"></code>t</span> = <code class="type">nativeint</code> </pre> <div class="info"> An alias for the type of native integers.<br> </div> <pre><span id="VALcompare"><span class="keyword">val</span> compare</span> : <code class="type"><a href="Nativeint.html#TYPEt">t</a> -> <a href="Nativeint.html#TYPEt">t</a> -> int</code></pre><div class="info"> The comparison function for native integers, with the same specification as <a href="Pervasives.html#VALcompare"><code class="code">compare</code></a>. Along with the type <code class="code">t</code>, this function <code class="code">compare</code> allows the module <code class="code"><span class="constructor">Nativeint</span></code> to be passed as argument to the functors <a href="Set.Make.html"><code class="code"><span class="constructor">Set</span>.<span class="constructor">Make</span></code></a> and <a href="Map.Make.html"><code class="code"><span class="constructor">Map</span>.<span class="constructor">Make</span></code></a>.<br> </div> </body></html>