mirror of
https://github.com/openharmony/third_party_vulkan-loader.git
synced 2026-07-18 16:14:33 -04:00
Bob Ellison
d2fa58d604
During SDK testing we identified that the runtime copyrights were out-of-date. The loader runtime includes two separate MIT copyrights, each attributed to a pair of source files, one initiated by Dave Gamble and one by joseph werle. I examined these files to discover that the last LunarG change to three out of the four was actually in 2017, not 2016. This date should be attributed to Khronos, Valve, and LunarG. By updating the copyright notice in these files, we ensure that the license registry remains up-to-date. Note that no real content changed (which is why the copyrights are not being updated to 2021).
99 lines
2.8 KiB
C
99 lines
2.8 KiB
C
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/**
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* `murmurhash.h' - murmurhash
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*
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* copyright (c) 2014 joseph werle <joseph.werle@gmail.com>
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* Copyright (c) 2015-2017 The Khronos Group Inc.
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* Copyright (c) 2015-2017 Valve Corporation
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* Copyright (c) 2015-2017 LunarG, Inc.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and/or associated documentation files (the "Materials"), to
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* deal in the Materials without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Materials, and to permit persons to whom the Materials are
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice(s) and this permission notice shall be included in
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* all copies or substantial portions of the Materials.
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*
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* THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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*
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE MATERIALS OR THE
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* USE OR OTHER DEALINGS IN THE MATERIALS.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stdint.h>
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#include "murmurhash.h"
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uint32_t murmurhash(const char *key, size_t len, uint32_t seed) {
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uint32_t c1 = 0xcc9e2d51;
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uint32_t c2 = 0x1b873593;
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uint32_t r1 = 15;
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uint32_t r2 = 13;
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uint32_t m = 5;
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uint32_t n = 0xe6546b64;
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uint32_t h = 0;
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uint32_t k = 0;
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uint8_t *d = (uint8_t *)key; // 32 bit extract from `key'
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const uint32_t *chunks = NULL;
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const uint8_t *tail = NULL; // tail - last 8 bytes
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int i = 0;
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int l = (int)len / 4; // chunk length
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h = seed;
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chunks = (const uint32_t *)(d + l * 4); // body
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tail = (const uint8_t *)(d + l * 4); // last 8 byte chunk of `key'
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// for each 4 byte chunk of `key'
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for (i = -l; i != 0; ++i) {
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// next 4 byte chunk of `key'
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k = chunks[i];
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// encode next 4 byte chunk of `key'
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k *= c1;
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k = (k << r1) | (k >> (32 - r1));
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k *= c2;
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// append to hash
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h ^= k;
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h = (h << r2) | (h >> (32 - r2));
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h = h * m + n;
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}
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k = 0;
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// remainder
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switch (len & 3) { // `len % 4'
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case 3:
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k ^= (tail[2] << 16);
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// fall through
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case 2:
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k ^= (tail[1] << 8);
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// fall through
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case 1:
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k ^= tail[0];
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k *= c1;
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k = (k << r1) | (k >> (32 - r1));
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k *= c2;
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h ^= k;
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}
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h ^= len;
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h ^= (h >> 16);
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h *= 0x85ebca6b;
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h ^= (h >> 13);
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h *= 0xc2b2ae35;
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h ^= (h >> 16);
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return h;
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}
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