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/*
* Copyright (C) 2013-2020 Argonne National Laboratory, Department of Energy,
* UChicago Argonne, LLC and The HDF Group.
* All rights reserved.
*
* The full copyright notice, including terms governing use, modification,
* and redistribution, is contained in the COPYING file that can be
* found at the root of the source code distribution tree.
*/
#ifndef MERCURY_HASH_STRING_H
#define MERCURY_HASH_STRING_H
#include "mercury_util_config.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* Hash function name for unique ID to register.
*
* \param string [IN] string name
*
* \return Non-negative ID that corresponds to string name
*/
static HG_UTIL_INLINE unsigned int
hg_hash_string(const char *string)
{
/* This is the djb2 string hash function */
unsigned int result = 5381;
const unsigned char *p;
p = (const unsigned char *)string;
while (*p != '\0') {
result = (result << 5) + result + *p;
++p;
}
return result;
}
#ifdef __cplusplus
}
#endif
#endif /* MERCURY_HASH_STRING_H */
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