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/* $Id: strhash1.cpp $ */
/** @file
* IPRT - String Hashing by Algorithm \#1.
*/
/*
* Copyright (C) 2012-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "internal/iprt.h"
#include <iprt/string.h>
#include "internal/strhash.h"
RTDECL(uint32_t) RTStrHash1(const char *pszString)
{
size_t cchIgnored;
return sdbm(pszString, &cchIgnored);
}
RTDECL(uint32_t) RTStrHash1N(const char *pszString, size_t cchString)
{
size_t cchIgnored;
return sdbmN(pszString, cchString, &cchIgnored);
}
RTDECL(uint32_t) RTStrHash1ExN(size_t cPairs, ...)
{
va_list va;
va_start(va, cPairs);
uint32_t uHash = RTStrHash1ExNV(cPairs, va);
va_end(va);
return uHash;
}
RTDECL(uint32_t) RTStrHash1ExNV(size_t cPairs, va_list va)
{
uint32_t uHash = 0;
for (uint32_t i = 0; i < cPairs; i++)
{
const char *psz = va_arg(va, const char *);
size_t cch = va_arg(va, size_t);
uHash += sdbmIncN(psz, cch, uHash);
}
return uHash;
}
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