isa-l/crc/crc16_t10dif_test.c

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#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include <stdlib.h>
#include "crc.h"
#include "crc_ref.h"
#include "test.h"

#ifndef TEST_SEED
#define TEST_SEED 0x1234
#endif

#define MAX_BUF   4096
#define TEST_SIZE 20

typedef uint32_t u32;
typedef uint16_t u16;
typedef uint8_t u8;

uint16_t
crc16_t10dif_ref(uint16_t seed, uint8_t *buf, uint64_t len);

void
rand_buffer(unsigned char *buf, long buffer_size)
{
        long i;
        for (i = 0; i < buffer_size; i++)
                buf[i] = rand();
}

int
main(int argc, char *argv[])
{
        int fail = 0;
        u32 r = 0;
        int i, s;
        void *buf_raw = NULL;
        unsigned char *buf;

        printf("Test crc16_t10dif_test ");
        if (posix_memalign(&buf_raw, 32, MAX_BUF * TEST_SIZE)) {
                printf("alloc error: Fail");
                return -1;
        }
        buf = (unsigned char *) buf_raw;

        srand(TEST_SEED);

        // Test of all zeros
        memset(buf, 0, MAX_BUF * 10);
        u16 crc_ref = crc16_t10dif_ref(TEST_SEED, buf, MAX_BUF);
        u16 crc_base = crc16_t10dif_base(TEST_SEED, buf, MAX_BUF);
        u16 crc = crc16_t10dif(TEST_SEED, buf, MAX_BUF);
        if ((crc_base != crc_ref) || (crc != crc_ref)) {
                fail++;
                printf("\n           opt   ref\n");
                printf("         ------ ------\n");
                printf("fail crc    zero = 0x%4x 0x%4x 0x%4x \n", crc_ref, crc_base, crc);
        }
#ifdef TEST_VERBOSE
        else
                printf(".");
#endif

        // Another simple test pattern
        memset(buf, 0x8a, MAX_BUF);
        crc_ref = crc16_t10dif_ref(TEST_SEED, buf, MAX_BUF);
        crc_base = crc16_t10dif_base(TEST_SEED, buf, MAX_BUF);
        crc = crc16_t10dif(TEST_SEED, buf, MAX_BUF);
        if ((crc_base != crc_ref) || (crc != crc_ref)) {
                fail++;
                printf("fail crc  all 8a = 0x%4x 0x%4x 0x%4x\n", crc_ref, crc_base, crc);
        }
#ifdef TEST_VERBOSE
        else
                printf(".");
#endif

        // Do a few random tests

        rand_buffer(buf, MAX_BUF * TEST_SIZE);

        for (i = 0; i < TEST_SIZE; i++) {
                crc_ref = crc16_t10dif_ref(TEST_SEED, buf, MAX_BUF);
                crc_base = crc16_t10dif_base(TEST_SEED, buf, MAX_BUF);
                crc = crc16_t10dif(TEST_SEED, buf, MAX_BUF);
                if ((crc_base != crc_ref) || (crc != crc_ref)) {
                        fail++;
                        printf("fail crc rand%3d = 0x%4x 0x%4x 0x%4x\n", i, crc_ref, crc_base, crc);
                }
#ifdef TEST_VERBOSE
                else if (i % (TEST_SIZE / 8) == 0)
                        printf(".");
#endif
                buf += MAX_BUF;
        }

        // Do a few random sizes
        buf = (unsigned char *) buf_raw; // reset buf
        r = rand();

        for (i = MAX_BUF; i >= 0; i--) {
                crc_ref = crc16_t10dif_ref(r, buf, i);
                crc_base = crc16_t10dif_base(r, buf, i);
                crc = crc16_t10dif(r, buf, i);
                if ((crc_base != crc_ref) || (crc != crc_ref)) {
                        fail++;
                        printf("fail random size%i 0x%8x 0x%8x 0x%8x\n", i, crc_ref, crc_base, crc);
                }
#ifdef TEST_VERBOSE
                else if (i % (MAX_BUF / 8) == 0)
                        printf(".");
#endif
        }

        // Try different seeds
        for (s = 0; s < 20; s++) {
                buf = (unsigned char *) buf_raw; // reset buf

                r = rand();                            // just to get a new seed
                rand_buffer(buf, MAX_BUF * TEST_SIZE); // new pseudo-rand data

#ifdef TEST_VERBOSE
                printf("seed = 0x%x\n", r);
#endif

                for (i = 0; i < TEST_SIZE; i++) {
                        crc_ref = crc16_t10dif_ref(r, buf, MAX_BUF);
                        crc_base = crc16_t10dif_base(r, buf, MAX_BUF);
                        crc = crc16_t10dif(r, buf, MAX_BUF);
                        if ((crc_base != crc_ref) || (crc != crc_ref)) {
                                fail++;
                                printf("fail crc rand%3d = 0x%4x 0x%4x 0x%4x\n", i, crc_ref,
                                       crc_base, crc);
                        }
#ifdef TEST_VERBOSE
                        else if (i % (TEST_SIZE * 20 / 8) == 0)
                                printf(".");
#endif
                        buf += MAX_BUF;
                }
        }

        // Run tests at end of buffer
        buf = (unsigned char *) buf_raw;         // reset buf
        buf = buf + ((MAX_BUF - 1) * TEST_SIZE); // Line up TEST_SIZE from end
        for (i = 0; i < TEST_SIZE; i++) {
                crc_ref = crc16_t10dif_ref(TEST_SEED, buf + i, TEST_SIZE - i);
                crc_base = crc16_t10dif_base(TEST_SEED, buf + i, TEST_SIZE - i);
                crc = crc16_t10dif(TEST_SEED, buf + i, TEST_SIZE - i);
                if ((crc_base != crc_ref) || (crc != crc_ref)) {
                        fail++;
                        printf("fail crc eob rand%3d = 0x%4x 0x%4x 0x%4x\n", i, crc_ref, crc_base,
                               crc);
                }
#ifdef TEST_VERBOSE
                else
                        printf(".");
#endif
        }

        printf("Test done: %s\n", fail ? "Fail" : "Pass");
        if (fail)
                printf("\nFailed %d tests\n", fail);

        if (buf)
                aligned_free(buf_raw);

        return fail;
}