quick_and_dirty_test_of_bcomp.cpp

cpp

#include <string.h>

#define crash(x) do{ if(!(x)){ __debugbreak(); int volatile* volatile ptr; ptr = 0; *ptr = 0; } }while(false)
#define min(a, b) (((b) < (a)) ? (b) : (a))

void test_1(unsigned char const* const data, size_t const size) noexcept
{
	uint8_t state[256];
	struct bcomp_state state_out;
	uint16_t bcomp_bits;
	uint8_t decompressed[256];
 
	if(!(size >= 256)){ return; }
	memcpy(&state[0], data, 256);
	compress_core(state, 256, &state_out, &bcomp_bits);
	decompression_core(state_out.bytes, 256, 0, decompressed);
	crash(memcmp(&state[0], &decompressed[0], 256) == 0);
}

void test_2(unsigned char const* const data, size_t const size) noexcept
{
	struct bcomp_state state_out;
	uint8_t decompressed[256];
 
	if(!(size >= sizeof(state_out))){ return; }
	memcpy(&state_out, data, sizeof(state_out));
	decompression_core(state_out.bytes, 256, 0, decompressed);
}

extern "C" int LLVMFuzzerTestOneInput(unsigned char const* const data, size_t const size) noexcept
{
	test_1(data, size);
	test_2(data, size);
	return 0;
}