1<!--$Id: db_get_byteswapped.so,v 10.24 2007/09/21 20:06:01 bostic Exp $--> 2<!--Copyright (c) 1997,2008 Oracle. All rights reserved.--> 3<!--See the file LICENSE for redistribution information.--> 4<html> 5<head> 6<title>Berkeley DB: Db::get_byteswapped</title> 7<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit."> 8<meta name="keywords" content="embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++"> 9</head> 10<body bgcolor=white> 11<table width="100%"><tr valign=top> 12<td> 13<b>Db::get_byteswapped</b> 14</td> 15<td align=right> 16<a href="/api_cxx/api_core.html"><img src="/images/api.gif" alt="API"></a> 17<a href="/ref/toc.html"><img src="/images/ref.gif" alt="Ref"></a></td> 18</tr></table> 19<hr size=1 noshade> 20<tt> 21<b><pre> 22#include <db_cxx.h> 23<p> 24int 25Db::get_byteswapped(int *isswapped); 26</pre></b> 27<hr size=1 noshade> 28<b>Description: Db::get_byteswapped</b> 29<p>The Db::get_byteswapped method returns if the underlying database 30files were created on an architecture of the same byte order as the 31current one, or if they were not (that is, big-endian on a little-endian 32machine, or vice versa). This information may be used to determine 33whether application data needs to be adjusted for this architecture or 34not.</p> 35<p>The Db::get_byteswapped method may not be called before the <a href="/api_cxx/db_open.html">Db::open</a> method is called.</p> 36<p>The Db::get_byteswapped method 37either returns a non-zero error value 38or throws an exception that encapsulates a non-zero error value on 39failure, and returns 0 on success. 40</p> 41<b>Parameters</b> <br> 42 <b>isswapped</b><ul compact><li>If the underlying database files were created on an architecture of the 43same byte order as the current one. 0 is stored into the memory location 44referenced by <b>isswapped</b>. If the underlying database files were 45created on an architecture of a different byte order as the current one, 461 is stored into the memory location referenced by <b>isswapped</b>.</ul> 47<br> 48<br><b>Errors</b> 49<p>The Db::get_byteswapped method 50may fail and throw 51<a href="/api_cxx/except_class.html">DbException</a>, 52encapsulating one of the following non-zero errors, or return one of 53the following non-zero errors:</p> 54<br> 55<b>EINVAL</b><ul compact><li>If the method was called before <a href="/api_cxx/db_open.html">Db::open</a> was called; or if an 56invalid flag value or parameter was specified.</ul> 57<br> 58<hr size=1 noshade> 59<br><b>Class</b> 60<a href="/api_cxx/db_class.html">Db</a> 61<br><b>See Also</b> 62<a href="/api_cxx/db_list.html">Databases and Related Methods</a> 63</tt> 64<table width="100%"><tr><td><br></td><td align=right> 65<a href="/api_cxx/api_core.html"><img src="/images/api.gif" alt="API"></a><a href="/ref/toc.html"><img src="/images/ref.gif" alt="Ref"></a> 66</td></tr></table> 67<p><font size=1>Copyright (c) 1996,2008 Oracle. All rights reserved.</font> 68</body> 69</html> 70