File: MLtonPointer

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<pre class=code>
<B><FONT COLOR="#5F9EA0">signature</FONT></B> MLTON_POINTER <B><FONT COLOR="#5F9EA0">=</FONT></B>
   <B><FONT COLOR="#5F9EA0">sig</FONT></B>
      <B><FONT COLOR="#A020F0">eqtype</FONT></B> t

      <B><FONT COLOR="#A020F0">val</FONT></B> add: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">word</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> t
      <B><FONT COLOR="#A020F0">val</FONT></B> compare: t <B><FONT COLOR="#5F9EA0">*</FONT></B> t <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> order
      <B><FONT COLOR="#A020F0">val</FONT></B> diff: t <B><FONT COLOR="#5F9EA0">*</FONT></B> t <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> <B><FONT COLOR="#228B22">word</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> getInt8: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> Int8.<B><FONT COLOR="#228B22">int</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> getInt16: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> Int16.<B><FONT COLOR="#228B22">int</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> getInt32: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> Int32.<B><FONT COLOR="#228B22">int</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> getInt64: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> Int64.<B><FONT COLOR="#228B22">int</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> getPointer: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> t
      <B><FONT COLOR="#A020F0">val</FONT></B> getReal32: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> Real32.<B><FONT COLOR="#228B22">real</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> getReal64: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> Real64.<B><FONT COLOR="#228B22">real</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> getWord8: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> Word8.<B><FONT COLOR="#228B22">word</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> getWord16: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> Word16.<B><FONT COLOR="#228B22">word</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> getWord32: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> Word32.<B><FONT COLOR="#228B22">word</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> getWord64: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> Word64.<B><FONT COLOR="#228B22">word</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> null: t
      <B><FONT COLOR="#A020F0">val</FONT></B> setInt8: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">*</FONT></B> Int8.<B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> <B><FONT COLOR="#228B22">unit</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> setInt16: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">*</FONT></B> Int16.<B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> <B><FONT COLOR="#228B22">unit</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> setInt32: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">*</FONT></B> Int32.<B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> <B><FONT COLOR="#228B22">unit</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> setInt64: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">*</FONT></B> Int64.<B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> <B><FONT COLOR="#228B22">unit</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> setPointer: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">*</FONT></B> t <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> <B><FONT COLOR="#228B22">unit</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> setReal32: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">*</FONT></B> Real32.<B><FONT COLOR="#228B22">real</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> <B><FONT COLOR="#228B22">unit</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> setReal64: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">*</FONT></B> Real64.<B><FONT COLOR="#228B22">real</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> <B><FONT COLOR="#228B22">unit</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> setWord8: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">*</FONT></B> Word8.<B><FONT COLOR="#228B22">word</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> <B><FONT COLOR="#228B22">unit</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> setWord16: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">*</FONT></B> Word16.<B><FONT COLOR="#228B22">word</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> <B><FONT COLOR="#228B22">unit</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> setWord32: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">*</FONT></B> Word32.<B><FONT COLOR="#228B22">word</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> <B><FONT COLOR="#228B22">unit</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> setWord64: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">int</FONT></B> <B><FONT COLOR="#5F9EA0">*</FONT></B> Word64.<B><FONT COLOR="#228B22">word</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> <B><FONT COLOR="#228B22">unit</FONT></B>
      <B><FONT COLOR="#A020F0">val</FONT></B> sub: t <B><FONT COLOR="#5F9EA0">*</FONT></B> <B><FONT COLOR="#228B22">word</FONT></B> <B><FONT COLOR="#5F9EA0">-</FONT></B><B><FONT COLOR="#5F9EA0">&gt;</FONT></B> t
   <B><FONT COLOR="#A020F0">end</FONT></B>
</PRE>
<p>
 
</p>

    <ul>

    <li>
<p>
 <tt>eqtype&nbsp;t</tt> 
</p>
</li>

        <ul>

  the type of pointers, i.e. machine addresses. 
        </ul>


    <li class="gap">
<p>
 <tt>add&nbsp;(p,&nbsp;w)</tt> 
</p>
</li>

        <ul>

  returns the pointer <tt>w</tt> bytes after than <tt>p</tt>.  Does not check   for overflow. 
        </ul>


    <li class="gap">
<p>
 <tt>compare&nbsp;(p1,&nbsp;p2)</tt> 
</p>
</li>

        <ul>

  compares the pointer <tt>p1</tt> to the pointer <tt>p2</tt> (as addresses). 
        </ul>


    <li class="gap">
<p>
 <tt>diff&nbsp;(p1,&nbsp;p2)</tt> 
</p>
</li>

        <ul>

  returns the number of bytes <tt>w</tt> such that <tt>add&nbsp;(p2,&nbsp;w)&nbsp;=&nbsp;p1</tt>.   Does not check for overflow. 
        </ul>


    <li class="gap">
<p>
 <tt>get</tt><em>X</em><tt>&nbsp;(p,&nbsp;i)</tt> 
</p>
</li>

        <ul>

  returns the object stored at index i of the array of <em>X</em> objects   pointed to by <tt>p</tt>.  For example, <tt>getWord32&nbsp;(p,&nbsp;7)</tt> returns   the 32-bit word stored 28 bytes beyond <tt>p</tt>. 
        </ul>


    <li class="gap">
<p>
 <tt>null</tt> 
</p>
</li>

        <ul>

  the null pointer, i.e. 0. 
        </ul>


    <li class="gap">
<p>
 <tt>set</tt><em>X</em><tt>&nbsp;(p,&nbsp;i,&nbsp;v)</tt> 
</p>
</li>

        <ul>

  assigns <tt>v</tt> to the object stored at index i of the array of <em>X</em>   objects pointed to by <tt>p</tt>.  For example,   <tt>setWord32&nbsp;(p,&nbsp;7,&nbsp;w)</tt> stores the 32-bit word <tt>w</tt> at the   address 28 bytes beyond <tt>p</tt>.  
        </ul>


    <li class="gap">
<p>
 <tt>sub&nbsp;(p,&nbsp;w)</tt> 
</p>
</li>

        <ul>

  returns the pointer <tt>w</tt> bytes before <tt>p</tt>.  Does not check for   overflow. </ul>

</ul>

</div>



<p>
<hr>
Last edited on 2006-02-03 15:59:41 by <span title="209-6-203-188.c3-0.smr-ubr1.sbo-smr.ma.cable.rcn.com"><a href="MatthewFluet">MatthewFluet</a></span>.
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