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394d998315
At least in neovim, `│vi:` is not recognized as a modeline because it has no preceding whitespace. After fixing this, opening a file yields an error because `net` is not an option. (`noet`, however, is.)
67 lines
3.2 KiB
C
67 lines
3.2 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set noet ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/serialize.h"
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#include "libc/stdio/rand.h"
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#include "libc/testlib/testlib.h"
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uint64_t counter(void) {
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static uint8_t t;
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return 0x0101010101010101ull * t++;
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}
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TEST(rngset, testZeroReseedInterval_doesntApplyPrng) {
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char buf[32];
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EXPECT_EQ(buf, rngset(buf, sizeof(buf), counter, 0));
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EXPECT_EQ(0x0000000000000000, READ64LE(buf + 0));
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EXPECT_EQ(0x0101010101010101, READ64LE(buf + 8));
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EXPECT_EQ(0x0202020202020202, READ64LE(buf + 16));
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EXPECT_EQ(0x0303030303030303, READ64LE(buf + 24));
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}
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uint64_t eleet(void) {
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return 0x31337;
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}
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TEST(rngset, testReseedIsNeg_usesInternalVignaPrng) {
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char buf[32];
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svigna(0x31337);
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EXPECT_EQ(buf, rngset(buf, sizeof(buf), eleet, -1));
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EXPECT_EQ(vigna(), READ64LE(buf + 0));
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EXPECT_EQ(vigna(), READ64LE(buf + 8));
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EXPECT_EQ(vigna(), READ64LE(buf + 16));
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EXPECT_EQ(vigna(), READ64LE(buf + 24));
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}
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TEST(rngset, testNullSeedFunction_reseedBecomesVignaSeed) {
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char buf[32];
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svigna(123);
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EXPECT_EQ(buf, rngset(buf, sizeof(buf), 0, 123));
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EXPECT_EQ(vigna(), READ64LE(buf + 0));
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EXPECT_EQ(vigna(), READ64LE(buf + 8));
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EXPECT_EQ(vigna(), READ64LE(buf + 16));
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EXPECT_EQ(vigna(), READ64LE(buf + 24));
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}
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TEST(rngset, testWeirdlyShaped_doesntCrash) {
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char buf[7];
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rngset(buf, sizeof(buf), 0, 0);
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rngset(buf, sizeof(buf), vigna, 0);
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rngset(buf, sizeof(buf), vigna, 9);
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rngset(buf, sizeof(buf), vigna, 8);
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}
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