Function arith_test

encoder/basisu_enc.cpp:4034–4354

	}

	bool arith_test()
	{
		basist::arith_fastbits_f32::init();

		fmt_printf("random bit test\n");

		const uint32_t N = 1000;

		// random bit test
		for (uint32_t i = 0; i < N; i++)
		{
			basist::arith::arith_enc enc;
			enc.init(4096);

			{
				basisu::rand r;
				r.seed(i + 1);
				uint32_t num_vals = r.irand(1, 20000);

				for (uint32_t j = 0; j < num_vals; j++)
					enc.put_bit(r.bit());

				enc.flush();
			}

			{
				basisu::rand r;
				r.seed(i + 1);
				uint32_t num_vals = r.irand(1, 20000);

				basist::arith::arith_dec dec;
				dec.init(enc.get_data_buf().get_ptr(), enc.get_data_buf().size());

				for (uint32_t j = 0; j < num_vals; j++)
				{
					uint32_t t = r.bit();

					uint32_t a = dec.get_bit();
					if (t != a)
					{
						fmt_printf("error!");
						return false;
					}
				}
			}
		}

		fmt_printf("Random bit test OK\n");

		fmt_printf("random bits test\n");

		// random bits test
		for (uint32_t i = 0; i < N; i++)
		{
			basist::arith::arith_enc enc;
			enc.init(4096);

			{