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| <title>The GNU Fortran Compiler: FTELL</title> |
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| <a name="FTELL-_002d_002d_002d-Current-stream-position"></a> |
| <h3 class="section">8.95 <code>FTELL</code> — Current stream position</h3> |
| <a name="index-FTELL"></a> |
| <a name="index-file-operation_002c-position-1"></a> |
| |
| <dl compact="compact"> |
| <dt><em>Description</em>:</dt> |
| <dd><p>Retrieves the current position within an open file. |
| </p> |
| <p>This intrinsic is provided in both subroutine and function forms; however, |
| only one form can be used in any given program unit. |
| </p> |
| </dd> |
| <dt><em>Standard</em>:</dt> |
| <dd><p>GNU extension |
| </p> |
| </dd> |
| <dt><em>Class</em>:</dt> |
| <dd><p>Subroutine, function |
| </p> |
| </dd> |
| <dt><em>Syntax</em>:</dt> |
| <dd><table> |
| <tr><td width="80%"><code>CALL FTELL(UNIT, OFFSET)</code></td></tr> |
| <tr><td width="80%"><code>OFFSET = FTELL(UNIT)</code></td></tr> |
| </table> |
| |
| </dd> |
| <dt><em>Arguments</em>:</dt> |
| <dd><table> |
| <tr><td width="15%"><var>OFFSET</var></td><td width="70%">Shall of type <code>INTEGER</code>.</td></tr> |
| <tr><td width="15%"><var>UNIT</var></td><td width="70%">Shall of type <code>INTEGER</code>.</td></tr> |
| </table> |
| |
| </dd> |
| <dt><em>Return value</em>:</dt> |
| <dd><p>In either syntax, <var>OFFSET</var> is set to the current offset of unit |
| number <var>UNIT</var>, or to <em>-1</em> if the unit is not currently open. |
| </p> |
| </dd> |
| <dt><em>Example</em>:</dt> |
| <dd><div class="smallexample"> |
| <pre class="smallexample">PROGRAM test_ftell |
| INTEGER :: i |
| OPEN(10, FILE="temp.dat") |
| CALL ftell(10,i) |
| WRITE(*,*) i |
| END PROGRAM |
| </pre></div> |
| |
| </dd> |
| <dt><em>See also</em>:</dt> |
| <dd><p><a href="FSEEK.html#FSEEK">FSEEK</a> |
| </p></dd> |
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