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      <base href="https://bugs.freedesktop.org/" />
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    <body><table border="1" cellspacing="0" cellpadding="8">
        <tr>
          <th>Priority</th>
          <td>medium
          </td>
        </tr>

        <tr>
          <th>Bug ID</th>
          <td><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW --- - casts from pointer to integer of different size or vice versa on 64 bit Windows (MinGW64 and MSVC)"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=81329">81329</a>
          </td>
        </tr>

        <tr>
          <th>Assignee</th>
          <td>chris@chris-wilson.co.uk
          </td>
        </tr>

        <tr>
          <th>Summary</th>
          <td>casts from pointer to integer of different size or vice versa on 64 bit Windows (MinGW64 and MSVC)
          </td>
        </tr>

        <tr>
          <th>QA Contact</th>
          <td>cairo-bugs@cairographics.org
          </td>
        </tr>

        <tr>
          <th>Severity</th>
          <td>normal
          </td>
        </tr>

        <tr>
          <th>Classification</th>
          <td>Unclassified
          </td>
        </tr>

        <tr>
          <th>OS</th>
          <td>Windows (All)
          </td>
        </tr>

        <tr>
          <th>Reporter</th>
          <td>peb@mppmu.mpg.de
          </td>
        </tr>

        <tr>
          <th>Hardware</th>
          <td>x86-64 (AMD64)
          </td>
        </tr>

        <tr>
          <th>Status</th>
          <td>NEW
          </td>
        </tr>

        <tr>
          <th>Version</th>
          <td>1.12.16
          </td>
        </tr>

        <tr>
          <th>Component</th>
          <td>general
          </td>
        </tr>

        <tr>
          <th>Product</th>
          <td>cairo
          </td>
        </tr></table>
      <p>
        <div>
        <pre>There are several instance where a pointer is cast to 'unsigned long' or vice
versa, e.g., in cairo-mempool.c and cairo-scaled-font.c.  On 64 bit Windows a
pointer has 8 bytes whereas long has only 4 bytes.  This certainly causes
compiler warnings and also might introduce bugs.

Ideally one should use uintptr_t instead of 'unsigned long' but that may not be
present everywhere.  An alternative is to use 'unsigned __int64' if and only if
_WIN64 is defined.</pre>
        </div>
      </p>
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