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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#if defined __cplusplus && !defined __STDC_FORMAT_MACROS
#define __STDC_FORMAT_MACROS
#endif
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "cksum.h"
enum
{
block_size = 16,
};
int
main(void)
{
unsigned char *test_data = NULL, *init_block = NULL;
size_t num_blocks = 1000;
if (!(init_block = (unsigned char *) calloc(block_size * block_size, 1U))
|| !(test_data = (unsigned char *) calloc((size_t) block_size * num_blocks, 1U)))
return EXIT_FAILURE;
/* this is supposed to be non-random */
srand48(5L);
init_block[7] = 15U;
/* repeat block and rotate */
for (size_t i = 1; i < block_size; ++i)
{
memcpy(init_block + block_size * i, init_block + block_size - i, i);
memcpy(init_block + block_size * i + i, init_block, block_size - i);
}
for (size_t i = 0; i < num_blocks; ++i)
{
size_t block_idx = ((size_t) lrand48()) % block_size;
memcpy(test_data + i, init_block + block_idx * block_size, block_size);
}
uint32_t cksum_result = memcrc(test_data, num_blocks * block_size);
if (cksum_result != UINT32_C(0xc47779cd))
{
printf("unexpected crc result: 0x%8" PRIx32 "\n", cksum_result);
return EXIT_FAILURE;
}
if (test_data) free(test_data);
if (init_block) free(init_block);
return EXIT_SUCCESS;
}
/*
* Local Variables:
* c-file-style: "Java"
* c-basic-offset: 2
* indent-tabs-mode: nil
* show-trailing-whitespace: t
* require-trailing-newline: t
* End:
*/
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