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/* $Id: strhash1.cpp $ */
/** @file
* IPRT - String Hashing by Algorithm \#1.
*/
/*
* Copyright (C) 2012-2020 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE 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.
*/
/*********************************************************************************************************************************
* 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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