| /* |
| * |
| * Copyright 2015 gRPC authors. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| #include "src/core/lib/gpr/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; |
| } |