group__fixed__math__fns.htm

MINIGUI1.6开发API

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          <td class="md" nowrap valign="top"><a class="el" href="group__gdi__types.htm#ga10">fixed</a> fixsqrt           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="group__gdi__types.htm#ga10">fixed</a>&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>x</em>          </td>
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<p>
Returns the non-negative square root of a fixed point value. 
<p>
This function returns the non-negative square root of <em>x</em>. It fails and sets errno to EDOM, if <em>x</em> is negative.<p>
<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="group__fixed__math__fns.htm#ga4">fixhypot</a> </dd></dl>
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<a class="anchor" name="ga10" doxytag="fixedmath.h::fixsub"></a><p>
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          <td class="md" nowrap valign="top"><a class="el" href="group__gdi__types.htm#ga10">fixed</a> fixsub           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="group__gdi__types.htm#ga10">fixed</a>&nbsp;</td>
          <td class="mdname" nowrap> <em>x</em>, </td>
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          <td class="md" nowrap><a class="el" href="group__gdi__types.htm#ga10">fixed</a>&nbsp;</td>
          <td class="mdname" nowrap> <em>y</em></td>
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          <td class="md">)&nbsp;</td>
          <td class="md" colspan="2"><code> [inline, static]</code></td>
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<p>
Subtract a fixed point value from another. 
<p>
This function subtracts the fixed point values <em>y</em> from the fixed point value <em>x</em>, and returns the difference.<p>
<dl compact><dt><b>Parameters:</b></dt><dd>
  <table border="0" cellspacing="2" cellpadding="0">
    <tr><td valign="top"></td><td valign="top"><em>x</em>&nbsp;</td><td>The minuend. </td></tr>
    <tr><td valign="top"></td><td valign="top"><em>y</em>&nbsp;</td><td>The subtrahend.</td></tr>
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<dl compact><dt><b>Returns:</b></dt><dd>The difference. If the result runs out of range of fixed point, this function sets <em>errno</em> to <em>ERANGE</em>.</dd></dl>
<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="group__fixed__math__fns.htm#ga9">fixadd</a> </dd></dl>

<p>
Definition at line <a class="el" href="fixedmath_8h-source.htm#l00231">231</a> of file <a class="el" href="fixedmath_8h-source.htm">fixedmath.h</a>.    </td>
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<a class="anchor" name="ga18" doxytag="fixedmath.h::fixtan"></a><p>
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          <td class="md" nowrap valign="top"><a class="el" href="group__gdi__types.htm#ga10">fixed</a> fixtan           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="group__gdi__types.htm#ga10">fixed</a>&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>x</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap><code> [inline, static]</code></td>
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<p>
Returns the tangent of a fixed point. 
<p>
This function returns the tangent of the fixed point <em>x</em>, where <em>x</em> is given in radians.<p>
<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="group__fixed__math__fns.htm#ga16">fixcos</a>, <a class="el" href="group__fixed__math__fns.htm#ga17">fixsin</a> </dd></dl>

<p>
Definition at line <a class="el" href="fixedmath_8h-source.htm#l00381">381</a> of file <a class="el" href="fixedmath_8h-source.htm">fixedmath.h</a>.    </td>
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<a class="anchor" name="ga8" doxytag="fixedmath.h::fixtof"></a><p>
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          <td class="md" nowrap valign="top">double fixtof           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="group__gdi__types.htm#ga10">fixed</a>&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>x</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap><code> [inline, static]</code></td>
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<p>
Converts a fixed point value to a float point value. 
<p>
This function converts the specified fixed point value <em>x</em> to a float point value.<p>
<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="group__fixed__math__fns.htm#ga7">ftofix</a> </dd></dl>

<p>
Definition at line <a class="el" href="fixedmath_8h-source.htm#l00174">174</a> of file <a class="el" href="fixedmath_8h-source.htm">fixedmath.h</a>.
<p>
Referenced by <a class="el" href="fixedmath_8h-source.htm#l00284">fixdiv()</a>, and <a class="el" href="fixedmath_8h-source.htm#l00266">fixmul()</a>.    </td>
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<a class="anchor" name="ga15" doxytag="fixedmath.h::fixtoi"></a><p>
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          <td class="md" nowrap valign="top">int fixtoi           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top"><a class="el" href="group__gdi__types.htm#ga10">fixed</a>&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>x</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap><code> [inline, static]</code></td>
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<p>
Converts an fixed point value to an integer. 
<p>
This function converts the fixed point <em>x</em> to an integer.<p>
<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="group__fixed__math__fns.htm#ga14">itofix</a> </dd></dl>

<p>
Definition at line <a class="el" href="fixedmath_8h-source.htm#l00339">339</a> of file <a class="el" href="fixedmath_8h-source.htm">fixedmath.h</a>.    </td>
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<a class="anchor" name="ga7" doxytag="fixedmath.h::ftofix"></a><p>
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          <td class="md" nowrap valign="top"><a class="el" href="group__gdi__types.htm#ga10">fixed</a> ftofix           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">double&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>x</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap><code> [inline, static]</code></td>
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<p>
Converts a float point value to a fixed point value. 
<p>
This function converts the specified float point value <em>x</em> to a fixed point value.<p>
<dl compact><dt><b>Note:</b></dt><dd>The float point should be ranged from -32767.0 to 32767.0. If it runs out of the range, this function sets <em>errno</em> to <em>ERANGE</em>.</dd></dl>
<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="group__fixed__math__fns.htm#ga8">fixtof</a> </dd></dl>

<p>
Definition at line <a class="el" href="fixedmath_8h-source.htm#l00150">150</a> of file <a class="el" href="fixedmath_8h-source.htm">fixedmath.h</a>.
<p>
Referenced by <a class="el" href="fixedmath_8h-source.htm#l00284">fixdiv()</a>, and <a class="el" href="fixedmath_8h-source.htm#l00266">fixmul()</a>.    </td>
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<a class="anchor" name="ga14" doxytag="fixedmath.h::itofix"></a><p>
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          <td class="md" nowrap valign="top"><a class="el" href="group__gdi__types.htm#ga10">fixed</a> itofix           </td>
          <td class="md" valign="top">(&nbsp;</td>
          <td class="md" nowrap valign="top">int&nbsp;</td>
          <td class="mdname1" valign="top" nowrap> <em>x</em>          </td>
          <td class="md" valign="top">&nbsp;)&nbsp;</td>
          <td class="md" nowrap><code> [inline, static]</code></td>
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<p>
Converts an integer to a fixed point value. 
<p>
This function converts the integer <em>x</em> to a fixed point value.<p>
<dl compact><dt><b>See also:</b></dt><dd><a class="el" href="group__fixed__math__fns.htm#ga15">fixtoi</a> </dd></dl>

<p>
Definition at line <a class="el" href="fixedmath_8h-source.htm#l00326">326</a> of file <a class="el" href="fixedmath_8h-source.htm">fixedmath.h</a>.    </td>
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