llhash.h
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- /**
- * @file llhash.h
- * @brief Wrapper for a hash function.
- *
- * $LicenseInfo:firstyear=2004&license=viewergpl$
- *
- * Copyright (c) 2004-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #ifndef LL_LLHASH_H
- #define LL_LLHASH_H
- #include "llpreprocessor.h" // for GCC_VERSION
- #if (LL_WINDOWS)
- #include <hash_map>
- #include <algorithm>
- #elif LL_DARWIN || LL_LINUX
- # if GCC_VERSION >= 40300 // gcc 4.3 and up
- # include <backward/hashtable.h>
- # elif GCC_VERSION >= 30400 // gcc 3.4 and up
- # include <ext/hashtable.h>
- # elif __GNUC__ >= 3
- # include <ext/stl_hashtable.h>
- # else
- # include <hashtable.h>
- # endif
- #elif LL_SOLARIS
- #include <ext/hashtable.h>
- #else
- #error Please define your platform.
- #endif
- // Warning - an earlier template-based version of this routine did not do
- // the correct thing on Windows. Since this is only used to get
- // a string hash, it was converted to a regular routine and
- // unit tests added.
- inline size_t llhash( const char * value )
- {
- #if LL_WINDOWS
- return stdext::hash_value(value);
- #elif ( (defined _STLPORT_VERSION) || ((LL_LINUX) && (__GNUC__ <= 2)) )
- std::hash<const char *> H;
- return H(value);
- #elif LL_DARWIN || LL_LINUX || LL_SOLARIS
- __gnu_cxx::hash<const char *> H;
- return H(value);
- #else
- #error Please define your platform.
- #endif
- }
- #endif