nissy-core

The "engine" of nissy, including the H48 optimal solver.
git clone https://git.tronto.net/nissy-core
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utils.h (1382B)


      1 long long parse_h48_hk(
      2     const char *, uint8_t [static 1], uint8_t [static 1]);
      3 STATIC long long dataid_h48(const char *, char [static NISSY_SIZE_DATAID]);
      4 
      5 long long
      6 parse_h48_hk(const char *buf, uint8_t h[static 1], uint8_t k[static 1])
      7 {
      8 	char format_error_msg[100];
      9 	sprintf(format_error_msg, "[H48] Error parsing H48 solver: must be in "
     10 	    "'h48h*k*' format, but got '%s'\n", buf);
     11 
     12 	buf += 3;
     13 
     14 	if (*buf != 'h') {
     15 		LOG(format_error_msg);
     16 		goto parse_h48_hk_error;
     17 	}
     18 	buf++;
     19 
     20 	*h = atoi(buf);
     21 	if (*h > 11) {
     22 		LOG("[H48] Invalid value %" PRIu8 " for parameter h\n", *h);
     23 		goto parse_h48_hk_error;
     24 	}
     25 
     26 	for ( ; *buf >= 0 + '0' && *buf <= 9 + '0'; buf++) {
     27 		if (*buf == 0) {
     28 			LOG(format_error_msg);
     29 			goto parse_h48_hk_error;
     30 		}
     31 	}
     32 
     33 	if (*buf != 'k') {
     34 		LOG(format_error_msg);
     35 		goto parse_h48_hk_error;
     36 	}
     37 	buf++;
     38 
     39 	*k = atoi(buf);
     40 	if (!(*k == 2 || (*k == 4 && *h == 0))) {
     41 		LOG("[H48] Invalid combinations of values h=%" PRIu8 " and k=%"
     42 		    PRIu8 " for parameters h and k\n", *h, *k);
     43 		goto parse_h48_hk_error;
     44 	}
     45 
     46 	return NISSY_OK;
     47 
     48 parse_h48_hk_error:
     49 	*h = 0;
     50 	*k = 0;
     51 	return NISSY_ERROR_INVALID_SOLVER;
     52 }
     53 
     54 STATIC long long
     55 dataid_h48(const char *hk, char buf[static NISSY_SIZE_DATAID])
     56 {
     57 	uint8_t h, k;
     58 	long long err;
     59 
     60 	err = parse_h48_hk(hk, &h, &k);
     61 	if (err < 0)
     62 		return err;
     63 
     64 	sprintf(buf, "h48h%" PRIu8 "k%" PRIu8, h, k);
     65 	return NISSY_OK;
     66 }