/** * @file llhash.h * @brief Wrapper for a hash function. * * $LicenseInfo:firstyear=2004&license=viewergpl$ * * Copyright (c) 2004-2009, 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