static int calc_and_compare_checksum(const unsigned char *buf, size_t len,
uint16_t expected)
{
uint16_t result = fletcher16(buf, len);
return result == expected;
}
bool Packet::checkHeader()
{
bool ok = false;
quint16 headerChecksum = header_.head_checksum;
header_.head_checksum = 0;
quint16 hchk = fletcher16((quint8*)&header_,HEADER_LENGTH);
ok = hchk == headerChecksum;
header_.head_checksum = headerChecksum;
return ok;
}
int main (int argc, char** argv)
{
int n = 200;
double p = .05;
const char* ifname = NULL;
const char* ofname = NULL;
//args
extern char* optarg;
const char* optstring = "hn:d:p:o:i:";
int c;
while ((c = getopt(argc, argv, optstring)) != -1) {
switch (c) {
case 'h':
fprintf(stderr, "%s", usage);
return -1;
case 'n': n = atoi(optarg); break;
case 'p': p = atof(optarg); break;
case 'o': ofname = optarg; break;
case 'i': ifname = optarg; break;
}
}
//make graph + output
int* l = gen_graph(n,p);
if(ifname)
write_matrix(ifname, n, l);
double start = omp_get_wtime();
infinitize(n,l);
floyd(l,n);
deinfinitize(n,l);
double end = omp_get_wtime();
printf("== OpenMP with %d threads\n", omp_get_max_threads());
printf("n: %d\n", n);
printf("p: %g\n", p);
printf("Time: %g sec\n", (end-start));
printf("Check: %X\n", fletcher16(l, n*n));
//output
if(ofname)
write_matrix(ofname,n,l);
free(l);
return 0;
}
static void test_checksum_fletcher16_0to1_undetected(void)
{
/* fletcher cannot distinguish between all 0 and all 1 segments */
unsigned char buf0[16] = {
0xA1, 0xA1, 0xA1, 0xA1,
0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x1A, 0x1A, 0x1A, 0x1A,
};
uint32_t expect = fletcher16(buf0, sizeof(buf0));
unsigned char buf1[16] = {
0xA1, 0xA1, 0xA1, 0xA1,
0xFF, 0xFF, 0xFF, 0xFF,
0xFF, 0xFF, 0xFF, 0xFF,
0x1A, 0x1A, 0x1A, 0x1A,
};
TEST_ASSERT(calc_and_compare_checksum(buf1, sizeof(buf1), expect));
}