1 // This file is distributed under the University of Illinois Open Source
2 // License. See LICENSE.TXT for details.
3 
4 // The fuzzer must find several constants with swapped bytes.
5 #include <cstdint>
6 #include <cstdio>
7 #include <cstdlib>
8 #include <cstring>
9 
10 extern "C" int LLVMFuzzerTestOneInput(const uint8_t *Data, size_t Size) {
11   if (Size < 14) return 0;
12   uint64_t x = 0;
13   uint32_t y = 0;
14   uint32_t z = 0;
15   memcpy(&x, Data, sizeof(x));
16   memcpy(&y, Data + Size / 2, sizeof(y));
17   memcpy(&z, Data + Size - sizeof(z), sizeof(z));
18 
19   x = __builtin_bswap64(x);
20   y = __builtin_bswap32(y);
21   z = __builtin_bswap32(z);
22   const bool k32bit = sizeof(void*) == 4;
23 
24   if ((k32bit || x == 0x46555A5A5A5A5546ULL) &&
25       z == 0x4F4B &&
26       y == 0x66757A7A &&
27       true
28       ) {
29     if (Data[Size - 5] == 'z') {
30       fprintf(stderr, "BINGO; Found the target\n");
31       exit(1);
32     }
33   }
34   return 0;
35 }
36