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Diffstat (limited to 'lib/mesa/src/util/rand_xor.c')
-rw-r--r--lib/mesa/src/util/rand_xor.c99
1 files changed, 0 insertions, 99 deletions
diff --git a/lib/mesa/src/util/rand_xor.c b/lib/mesa/src/util/rand_xor.c
deleted file mode 100644
index 09febcc33..000000000
--- a/lib/mesa/src/util/rand_xor.c
+++ /dev/null
@@ -1,99 +0,0 @@
-/*
- * Copyright 2017 Timothy Arceri
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom the
- * Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice (including the next
- * paragraph) shall be included in all copies or substantial portions of the
- * Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- *
- */
-
-#ifdef HAVE_GETENTROPY
-
-#ifdef HAVE_SYS_RANDOM_H
-#include <sys/random.h>
-#else
-#include <unistd.h>
-#endif
-
-#elif defined(__linux__)
-#include <sys/file.h>
-#include <unistd.h>
-#include <fcntl.h>
-#else
-#include <time.h>
-#endif
-
-#include "rand_xor.h"
-
-/* Super fast random number generator.
- *
- * This rand_xorshift128plus function by Sebastiano Vigna belongs
- * to the public domain.
- */
-uint64_t
-rand_xorshift128plus(uint64_t *seed)
-{
- uint64_t *s = seed;
-
- uint64_t s1 = s[0];
- const uint64_t s0 = s[1];
- s[0] = s0;
- s1 ^= s1 << 23;
- s[1] = s1 ^ s0 ^ (s1 >> 18) ^ (s0 >> 5);
-
- return s[1] + s0;
-}
-
-void
-s_rand_xorshift128plus(uint64_t *seed, bool randomised_seed)
-{
- if (!randomised_seed)
- goto fixed_seed;
-
-#ifdef HAVE_GETENTROPY
- size_t seed_size = sizeof(uint64_t) * 2;
- if (getentropy(seed, seed_size) == -1)
- goto fixed_seed;
- return;
-#elif defined(__linux__)
- int fd = open("/dev/urandom", O_RDONLY);
- if (fd < 0)
- goto fixed_seed;
-
- size_t seed_size = sizeof(uint64_t) * 2;
- if (read(fd, seed, seed_size) != seed_size) {
- close(fd);
- goto fixed_seed;
- }
-
- close(fd);
- return;
-
-#else
- seed[0] = 0x3bffb83978e24f88;
- seed[1] = time(NULL);
-
- return;
-#endif
-
-fixed_seed:
-
- /* Fallback to a fixed seed */
- seed[0] = 0x3bffb83978e24f88;
- seed[1] = 0x9238d5d56c71cd35;
-}