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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(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(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(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(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(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(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(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(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(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(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;
}