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

#define TEST_SIZE (128*1024)

typedef unsigned char u8;

int main(int argc, char *argv[])
{
	int i, ret = -1;
	u8 *buff1 = NULL, *buff2 = NULL, *buff3 = NULL, gf_const_tbl[64], a = 2;
	int tsize;
	int align, size;
	unsigned char *efence_buff1;
	unsigned char *efence_buff2;
	unsigned char *efence_buff3;

	printf("gf_vect_mul_test: ");

	gf_vect_mul_init(a, gf_const_tbl);

	buff1 = (u8 *) malloc(TEST_SIZE);
	buff2 = (u8 *) malloc(TEST_SIZE);
	buff3 = (u8 *) malloc(TEST_SIZE);

	if (NULL == buff1 || NULL == buff2 || NULL == buff3) {
		printf("buffer alloc error\n");
		goto exit;
	}
	// Fill with rand data
	for (i = 0; i < TEST_SIZE; i++)
		buff1[i] = rand();

	if (gf_vect_mul(TEST_SIZE, gf_const_tbl, buff1, buff2) != 0) {
		printf("fail creating buff2\n");
		goto exit;
	}

	for (i = 0; i < TEST_SIZE; i++) {
		if (gf_mul_erasure(a, buff1[i]) != buff2[i]) {
			printf("fail at %d, 0x%x x 2 = 0x%x (0x%x)\n", i,
			       buff1[i], buff2[i], gf_mul_erasure(2, buff1[i]));
			goto exit;
		}
	}

	if (gf_vect_mul_base(TEST_SIZE, gf_const_tbl, buff1, buff3) != 0) {
		printf("fail fill with rand data\n");
		goto exit;
	}
	// Check reference function
	for (i = 0; i < TEST_SIZE; i++) {
		if (buff2[i] != buff3[i]) {
			printf("fail at %d, 0x%x x 0x%d = 0x%x (0x%x)\n",
			       i, a, buff1[i], buff2[i], gf_mul_erasure(a, buff1[i]));
			goto exit;
		}
	}

	for (i = 0; i < TEST_SIZE; i++)
		buff1[i] = rand();

	// Check each possible constant
	for (a = 0; a != 255; a++) {
		gf_vect_mul_init(a, gf_const_tbl);
		if (gf_vect_mul(TEST_SIZE, gf_const_tbl, buff1, buff2) != 0) {
			printf("fail creating buff2\n");
			goto exit;
		}

		for (i = 0; i < TEST_SIZE; i++)
			if (gf_mul_erasure(a, buff1[i]) != buff2[i]) {
				printf("fail at %d, 0x%x x %d = 0x%x (0x%x)\n",
				       i, a, buff1[i], buff2[i], gf_mul_erasure(2, buff1[i]));
				goto exit;
			}
#ifdef TEST_VERBOSE
		putchar('.');
#endif
	}

	// Check buffer len
	for (tsize = TEST_SIZE; tsize > 0; tsize -= 32) {
		a = rand();
		gf_vect_mul_init(a, gf_const_tbl);
		if (gf_vect_mul(tsize, gf_const_tbl, buff1, buff2) != 0) {
			printf("fail creating buff2 (len %d)\n", tsize);
			goto exit;
		}

		for (i = 0; i < tsize; i++)
			if (gf_mul_erasure(a, buff1[i]) != buff2[i]) {
				printf("fail at %d, 0x%x x %d = 0x%x (0x%x)\n",
				       i, a, buff1[i], buff2[i], gf_mul_erasure(2, buff1[i]));
				goto exit;
			}
#ifdef TEST_VERBOSE
		if (0 == tsize % (32 * 8)) {
			putchar('.');
			fflush(0);
		}
#endif
	}

	// Run tests at end of buffer for Electric Fence
	align = 32;
	a = 2;

	gf_vect_mul_init(a, gf_const_tbl);
	for (size = 0; size < TEST_SIZE; size += align) {
		// Line up TEST_SIZE from end
		efence_buff1 = buff1 + size;
		efence_buff2 = buff2 + size;
		efence_buff3 = buff3 + size;

		gf_vect_mul(TEST_SIZE - size, gf_const_tbl, efence_buff1, efence_buff2);

		for (i = 0; i < TEST_SIZE - size; i++)
			if (gf_mul_erasure(a, efence_buff1[i]) != efence_buff2[i]) {
				printf("fail at %d, 0x%x x 2 = 0x%x (0x%x)\n",
				       i, efence_buff1[i], efence_buff2[i],
				       gf_mul_erasure(2, efence_buff1[i]));
				goto exit;
			}

		if (gf_vect_mul_base
		    (TEST_SIZE - size, gf_const_tbl, efence_buff1, efence_buff3) != 0) {
			printf("fail line up TEST_SIZE from end\n");
			goto exit;
		}
		// Check reference function
		for (i = 0; i < TEST_SIZE - size; i++)
			if (efence_buff2[i] != efence_buff3[i]) {
				printf("fail at %d, 0x%x x 0x%d = 0x%x (0x%x)\n",
				       i, a, efence_buff2[i], efence_buff3[i],
				       gf_mul_erasure(2, efence_buff1[i]));
				goto exit;
			}
#ifdef TEST_VERBOSE
		putchar('.');
#endif
	}

	// Test all unsupported sizes up to TEST_SIZE
	for (size = 0; size < TEST_SIZE; size++) {
		if (size % align != 0 && gf_vect_mul(size, gf_const_tbl, buff1, buff2) == 0) {
			printf
			    ("fail expecting nonzero return code for unaligned size param (%d)\n",
			     size);
			goto exit;
		}
	}

	printf(" done: Pass\n");
	fflush(0);

	ret = 0;
      exit:

	free(buff1);
	free(buff2);
	free(buff3);

	return ret;
}