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#include <stdio.h>
#include <stdlib.h>
#include "sha1_mb.h"

#define TEST_LEN  (1024*1024)
#define TEST_BUFS (SHA1_MAX_LANES - 1)
#ifndef TEST_SEED
# define TEST_SEED 0x1234
#endif

static uint32_t digest_ref[TEST_BUFS][SHA1_DIGEST_NWORDS];

// Compare against reference function
extern void sha1_ref(uint8_t * input_data, uint32_t * digest, uint32_t len);

// Generates pseudo-random data
void rand_buffer(unsigned char *buf, const long buffer_size)
{
	long i;
	for (i = 0; i < buffer_size; i++)
		buf[i] = rand();
}

uint8_t lens_print_and_check(SHA1_HASH_CTX_MGR * mgr)
{
	static int32_t last_lens[SHA1_MAX_LANES] = { 0 };
	int32_t len;
	uint8_t num_unchanged = 0;
	int i;
	for (i = 0; i < SHA1_MAX_LANES; i++) {
		len = (int32_t) mgr->mgr.lens[i];
		// len[i] in mgr consists of byte_length<<4 | lane_index
		len = (len >= 16) ? (len >> 4 << 6) : 0;
		printf("\t%d", len);
		if (last_lens[i] > 0 && last_lens[i] == len)
			num_unchanged += 1;
		last_lens[i] = len;
	}
	printf("\n");
	return num_unchanged;
}

int main(void)
{
	SHA1_HASH_CTX_MGR *mgr = NULL;
	SHA1_HASH_CTX ctxpool[TEST_BUFS];
	uint32_t i, j, fail = 0;
	unsigned char *bufs[TEST_BUFS];
	uint32_t lens[TEST_BUFS];
	uint8_t num_ret, num_unchanged = 0;
	int ret;

	printf("sha1_mb flush test, %d buffers with %d length: \n", TEST_BUFS, TEST_LEN);

	ret = posix_memalign((void *)&mgr, 16, sizeof(SHA1_HASH_CTX_MGR));
	if ((ret != 0) || (mgr == NULL)) {
		printf("posix_memalign failed test aborted\n");
		return 1;
	}

	sha1_ctx_mgr_init(mgr);

	srand(TEST_SEED);

	for (i = 0; i < TEST_BUFS; i++) {
		// Allocate  and fill buffer
		lens[i] = TEST_LEN / SHA1_MAX_LANES * (i + 1);
		bufs[i] = (unsigned char *)malloc(lens[i]);
		if (bufs[i] == NULL) {
			printf("malloc failed test aborted\n");
			return 1;
		}
		rand_buffer(bufs[i], lens[i]);
	}

	for (i = 0; i < TEST_BUFS; i++) {
		// Init ctx contexts
		hash_ctx_init(&ctxpool[i]);
		ctxpool[i].user_data = (void *)((uint64_t) i);

		// Run reference test
		sha1_ref(bufs[i], digest_ref[i], lens[i]);

		// Run sb_sha1 test
		sha1_ctx_mgr_submit(mgr, &ctxpool[i], bufs[i], lens[i], HASH_ENTIRE);
	}

	printf("Changes of lens inside mgr:\n");
	lens_print_and_check(mgr);
	while (sha1_ctx_mgr_flush(mgr)) {
		num_ret = lens_print_and_check(mgr);
		num_unchanged = num_unchanged > num_ret ? num_unchanged : num_ret;
	}
	printf("Info of sha1_mb lens prints over\n");

	for (i = 0; i < TEST_BUFS; i++) {
		for (j = 0; j < SHA1_DIGEST_NWORDS; j++) {
			if (ctxpool[i].job.result_digest[j] != digest_ref[i][j]) {
				fail++;
				printf("Test%d fixed size, digest%d "
				       "fail 0x%08X <=> 0x%08X \n",
				       i, j, ctxpool[i].job.result_digest[j],
				       digest_ref[i][j]);
			}
		}
	}

	if (fail)
		printf("Test failed function check %d\n", fail);
	else if (num_unchanged)
		printf("SHA-NI is used when %d or %d jobs are uncompleted\n",
		       num_unchanged, num_unchanged + 1);
	else
		printf("SHA-NI is not used, or used for last job\n");

	return fail;
}