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<!--$Id: namespace.so,v 10.14 2000/08/01 21:51:23 bostic Exp $-->
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<!--Copyright 1997, 1998, 1999, 2000 by Sleepycat Software, Inc.-->
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<html>
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<head>
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<title>Berkeley DB Reference Guide: Name spaces</title>
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<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
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<meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++">
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<a name="2"><!--meow--></a>
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<table><tr valign=top>
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<td><h3><dl><dt>Berkeley DB Reference Guide:<dd>Programmer Notes</dl></h3></td>
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<td width="1%"><a href="../../ref/program/scope.html"><img src="../../images/prev.gif" alt="Prev"></a><a href="../../ref/toc.html"><img src="../../images/ref.gif" alt="Ref"></a><a href="../../ref/program/copy.html"><img src="../../images/next.gif" alt="Next"></a>
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</td></tr></table>
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<p>
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<h1 align=center>Name spaces</h1>
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<p>The Berkeley DB library is careful to avoid C language programmer name spaces,
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but there are a few potential areas for concern, mostly in the Berkeley DB
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include file db.h. The db.h include file defines a number of types and
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strings. Where possible, all of these types and strings are prefixed with
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"DB_" or "db_". There are a few notable exceptions.
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<p>The Berkeley DB library uses a macro named "__P" to configure for systems that
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do not provide ANSI C function prototypes. This could potentially collide
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with other systems using a "__P" macro for similar or different purposes.
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<p>The Berkeley DB library needs information about specifically sized types for
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each architecture. If they are not provided by the system, they are
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typedef'd in the db.h include file. The types which may be typedef'd
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by db.h include the following: u_int8_t, int16_t, u_int16_t, int32_t,
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u_int32_t, u_char, u_short, u_int and u_long.
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<p>The Berkeley DB library declares a number of external routines. All of these
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routines are prefixed with the strings "db_", "lock_", "log_", "memp_"
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or "txn_". All internal routines are prefixed with the strings "__db_",
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"__lock_," "__log_", "__memp_" or "__txn_".
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<p>Berkeley DB environments create or use some number of files in environment home
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directories. These files are named <a href="../../ref/env/naming.html#DB_CONFIG">DB_CONFIG</a>, "log.NNNNNNNNNN"
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(e.g., log.0000000003), or with the string prefix "__db" (e.g., __db.001).
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Database files that match these names should not be created in the
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environment directory.
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<p><font size=1><a href="http://www.sleepycat.com">Copyright Sleepycat Software</a></font>
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