mirror of
https://github.com/XTXMarkets/ternfs.git
synced 2025-12-30 15:30:28 -06:00
6addbdee6a
Initial version really by Pawel, but many changes in between. Big outstanding issues: * span cache reclamation (unbounded memory otherwise...) * bad block service detection and workarounds * corrupted blocks detection and workaround Co-authored-by: Paweł Dziepak <pawel.dziepak@xtxmarkets.com>
95 lines
3.0 KiB
C++
95 lines
3.0 KiB
C++
#include <stdio.h>
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#include <string.h>
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#include <vector>
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#include <immintrin.h>
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#include "crc32c.h"
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#include "wyhash.h"
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#define ASSERT(expr) do { \
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if (!(expr)) { \
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fprintf(stderr, "Assertion failed: " #expr "\n"); \
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exit(1); \
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} \
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} while (false)
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int main() {
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uint32_t expectedCrc = 0x6c0ec068u;
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const char* str = "bazzer\n";
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ASSERT(expectedCrc == crc32c(0, str, strlen(str)));
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uint64_t rand = 0;
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const auto randString = [&rand](size_t l) -> std::vector<uint8_t> {
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std::vector<uint8_t> s(l, 0);
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wyhash64_bytes(&rand, s.data(), s.size());
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return s;
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};
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// Test append
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for (int i = 0; i < 1000; i++) {
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auto s1 = randString(1 + wyhash64(&rand)%100);
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uint32_t crc1 = crc32c(0, (const char*)s1.data(), s1.size());
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ASSERT(crc1 == crc32c_append(0, crc1, s1.size()));
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auto s2 = randString(1 + wyhash64(&rand)%100);
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uint32_t crc2 = crc32c(0, (const char*)s2.data(), s2.size());
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std::vector<uint8_t> s = s1;
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s.insert(s.end(), s2.begin(), s2.end());
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uint32_t crc = crc32c(0, (const char*)s.data(), s.size());
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ASSERT(crc == crc32c_append(crc1, crc2, s2.size()));
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}
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// Test XOR
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for (int i = 0; i < 1000; i++) {
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size_t l = 1 + wyhash64(&rand)%100;
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auto s1 = randString(l);
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uint32_t crc1 = crc32c(0, (const char*)s1.data(), s1.size());
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auto s2 = randString(l);
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uint32_t crc2 = crc32c(0, (const char*)s2.data(), s2.size());
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std::vector<uint8_t> s = s1;
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for (int i = 0; i < l; i++) {
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s[i] ^= s2[i];
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}
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uint32_t crc = crc32c(0, (const char*)s.data(), s.size());
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ASSERT(crc == crc32c_xor(crc1, crc2, l));
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}
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// Test zero extend
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for (int i = 0; i < 100; i++) {
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size_t l = 1 + wyhash64(&rand)%100;
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size_t lzeros = wyhash64(&rand)%100;
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auto s = randString(l);
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std::vector<uint8_t> szeros(l + lzeros, 0);
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memcpy(&szeros[0], s.data(), l);
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uint32_t crc = crc32c(0, (const char*)s.data(), l);
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ASSERT(
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crc32c_zero_extend(crc, lzeros) ==
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crc32c(0, (const char*)szeros.data(), szeros.size())
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);
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}
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// Test zero contract
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for (int i = 0; i < 100; i++) {
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size_t l = 1 + wyhash64(&rand)%100;
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ssize_t lzeros = wyhash64(&rand)%100;
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auto s = randString(l);
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std::vector<uint8_t> szeros(l + lzeros, 0);
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memcpy(&szeros[0], s.data(), l);
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uint32_t crc = crc32c(0, (const char*)szeros.data(), szeros.size());
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ASSERT(
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crc32c_zero_extend(crc, -lzeros) ==
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crc32c(0, (const char*)s.data(), s.size())
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);
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}
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for (int i = 0; i < 100; i++) {
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size_t l = 1 + wyhash64(&rand)%100;
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auto s = randString(l);
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ASSERT(
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crc32c(0, (const char*)s.data(), s.size()) ==
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crc32c(crc32c(0, (const char*)s.data(), s.size()), "", 0)
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);
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}
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return 0;
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} |