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/*
*
* Copyright 2015, Google Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
#include "src/core/lib/support/murmur_hash.h"
#include <grpc/support/log.h>
#include <grpc/support/string_util.h>
#include "test/core/util/test_config.h"
#include <string.h>
typedef uint32_t (*hash_func)(const void *key, size_t len, uint32_t seed);
/* From smhasher:
This should hopefully be a thorough and uambiguous test of whether a hash
is correctly implemented on a given platform */
static void verification_test(hash_func hash, uint32_t expected) {
uint8_t key[256];
uint32_t hashes[256];
uint32_t final = 0;
size_t i;
memset(key, 0, sizeof(key));
memset(hashes, 0, sizeof(hashes));
/* Hash keys of the form {0}, {0,1}, {0,1,2}... up to N=255,using 256-N as
the seed */
for (i = 0; i < 256; i++) {
key[i] = (uint8_t)i;
hashes[i] = hash(key, i, (uint32_t)(256u - i));
}
/* Then hash the result array */
final = hash(hashes, sizeof(hashes), 0);
/* The first four bytes of that hash, interpreted as a little-endian integer,
is our
verification value */
if (expected != final) {
gpr_log(GPR_INFO, "Verification value 0x%08X : Failed! (Expected 0x%08x)",
final, expected);
abort();
} else {
gpr_log(GPR_INFO, "Verification value 0x%08X : Passed!", final);
}
}
int main(int argc, char **argv) {
grpc_test_init(argc, argv);
/* basic tests to verify that things don't crash */
gpr_murmur_hash3("", 0, 0);
gpr_murmur_hash3("xyz", 3, 0);
verification_test(gpr_murmur_hash3, 0xB0F57EE3);
return 0;
}
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