| <html lang="en"> |
| <head> |
| <title>TRANSFER - The GNU Fortran Compiler</title> |
| <meta http-equiv="Content-Type" content="text/html"> |
| <meta name="description" content="The GNU Fortran Compiler"> |
| <meta name="generator" content="makeinfo 4.13"> |
| <link title="Top" rel="start" href="index.html#Top"> |
| <link rel="up" href="Intrinsic-Procedures.html#Intrinsic-Procedures" title="Intrinsic Procedures"> |
| <link rel="prev" href="TRAILZ.html#TRAILZ" title="TRAILZ"> |
| <link rel="next" href="TRANSPOSE.html#TRANSPOSE" title="TRANSPOSE"> |
| <link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> |
| <!-- |
| Copyright (C) 1999-2013 Free Software Foundation, Inc. |
| |
| Permission is granted to copy, distribute and/or modify this document |
| under the terms of the GNU Free Documentation License, Version 1.3 or |
| any later version published by the Free Software Foundation; with the |
| Invariant Sections being ``Funding Free Software'', the Front-Cover |
| Texts being (a) (see below), and with the Back-Cover Texts being (b) |
| (see below). A copy of the license is included in the section entitled |
| ``GNU Free Documentation License''. |
| |
| (a) The FSF's Front-Cover Text is: |
| |
| A GNU Manual |
| |
| (b) The FSF's Back-Cover Text is: |
| |
| You have freedom to copy and modify this GNU Manual, like GNU |
| software. Copies published by the Free Software Foundation raise |
| funds for GNU development.--> |
| <meta http-equiv="Content-Style-Type" content="text/css"> |
| <style type="text/css"><!-- |
| pre.display { font-family:inherit } |
| pre.format { font-family:inherit } |
| pre.smalldisplay { font-family:inherit; font-size:smaller } |
| pre.smallformat { font-family:inherit; font-size:smaller } |
| pre.smallexample { font-size:smaller } |
| pre.smalllisp { font-size:smaller } |
| span.sc { font-variant:small-caps } |
| span.roman { font-family:serif; font-weight:normal; } |
| span.sansserif { font-family:sans-serif; font-weight:normal; } |
| --></style> |
| </head> |
| <body> |
| <div class="node"> |
| <a name="TRANSFER"></a> |
| <p> |
| Next: <a rel="next" accesskey="n" href="TRANSPOSE.html#TRANSPOSE">TRANSPOSE</a>, |
| Previous: <a rel="previous" accesskey="p" href="TRAILZ.html#TRAILZ">TRAILZ</a>, |
| Up: <a rel="up" accesskey="u" href="Intrinsic-Procedures.html#Intrinsic-Procedures">Intrinsic Procedures</a> |
| <hr> |
| </div> |
| |
| <h3 class="section">8.247 <code>TRANSFER</code> — Transfer bit patterns</h3> |
| |
| <p><a name="index-TRANSFER-1112"></a><a name="index-bits_002c-move-1113"></a><a name="index-type-cast-1114"></a> |
| <dl> |
| <dt><em>Description</em>:<dd>Interprets the bitwise representation of <var>SOURCE</var> in memory as if it |
| is the representation of a variable or array of the same type and type |
| parameters as <var>MOLD</var>. |
| |
| <p>This is approximately equivalent to the C concept of <em>casting</em> one |
| type to another. |
| |
| <br><dt><em>Standard</em>:<dd>Fortran 95 and later |
| |
| <br><dt><em>Class</em>:<dd>Transformational function |
| |
| <br><dt><em>Syntax</em>:<dd><code>RESULT = TRANSFER(SOURCE, MOLD[, SIZE])</code> |
| |
| <br><dt><em>Arguments</em>:<dd> |
| <p><table summary=""><tr align="left"><td valign="top" width="15%"><var>SOURCE</var> </td><td valign="top" width="70%">Shall be a scalar or an array of any type. |
| <br></td></tr><tr align="left"><td valign="top" width="15%"><var>MOLD</var> </td><td valign="top" width="70%">Shall be a scalar or an array of any type. |
| <br></td></tr><tr align="left"><td valign="top" width="15%"><var>SIZE</var> </td><td valign="top" width="70%">(Optional) shall be a scalar of type |
| <code>INTEGER</code>. |
| <br></td></tr></table> |
| |
| <br><dt><em>Return value</em>:<dd>The result has the same type as <var>MOLD</var>, with the bit level |
| representation of <var>SOURCE</var>. If <var>SIZE</var> is present, the result is |
| a one-dimensional array of length <var>SIZE</var>. If <var>SIZE</var> is absent |
| but <var>MOLD</var> is an array (of any size or shape), the result is a one- |
| dimensional array of the minimum length needed to contain the entirety |
| of the bitwise representation of <var>SOURCE</var>. If <var>SIZE</var> is absent |
| and <var>MOLD</var> is a scalar, the result is a scalar. |
| |
| <p>If the bitwise representation of the result is longer than that of |
| <var>SOURCE</var>, then the leading bits of the result correspond to those of |
| <var>SOURCE</var> and any trailing bits are filled arbitrarily. |
| |
| <p>When the resulting bit representation does not correspond to a valid |
| representation of a variable of the same type as <var>MOLD</var>, the results |
| are undefined, and subsequent operations on the result cannot be |
| guaranteed to produce sensible behavior. For example, it is possible to |
| create <code>LOGICAL</code> variables for which <var>VAR</var> and |
| <code>.NOT.</code><var>VAR</var> both appear to be true. |
| |
| <br><dt><em>Example</em>:<dd> |
| <pre class="smallexample"> PROGRAM test_transfer |
| integer :: x = 2143289344 |
| print *, transfer(x, 1.0) ! prints "NaN" on i686 |
| END PROGRAM |
| </pre> |
| </dl> |
| |
| </body></html> |
| |
