/** * @file llhash.h * @brief Wrapper for a hash function. * * $LicenseInfo:firstyear=2004&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2010, Linden Research, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; * version 2.1 of the License only. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ #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