static int gps_chksum_ok ( const char * s )
{
uint8_t chksum = 0;
uint8_t chk;
while (*s)
{
if (*s == '*')
{
int k;
k = hex_get (s[1]);
if (k < 0)
return 0;
chk = k << 4;
k = hex_get (s[2]);
if (k < 0)
return 0;
chk = chk | k;
if (s[3] != 0)
return 0;
if (chk == chksum)
return 1;
return 0;
}
chksum = chksum ^ (*s);
s++;
}
return 0;
}
static int get_vector(FILE *file, uint8_t vec[])
{
char buf[132 + 1];
char *s;
int i;
int value;
while (fgets(buf, 133, file))
{
s = buf;
i = 0;
while ((value = hex_get(s)) >= 0)
{
vec[i++] = value;
s += 2;
}
return i;
}
return 0;
}
