* Parse elem, the elem could be single number/range or group * 1) A single number elem, it's just a simple digit. e.g. 9 * 2) A single range elem, two digits with a '-' between. e.g. 2-6 * 3) A group elem, combines multiple 1) or 2) e.g 0,2-4,6 * Within group, '-' used for a range separator; * ',' used for a single number. */
| 21 | * ',' used for a single number. |
| 22 | */ |
| 23 | int |
| 24 | parse_set(const char *input, uint16_t set[], unsigned int num) |
| 25 | { |
| 26 | unsigned int idx; |
| 27 | const char *str = input; |
| 28 | char *end = NULL; |
| 29 | unsigned int min, max; |
| 30 | |
| 31 | memset(set, 0, num * sizeof(uint16_t)); |
| 32 | |
| 33 | while (isblank(*str)) |
| 34 | str++; |
| 35 | |
| 36 | /* only digit or left bracket is qualify for start point */ |
| 37 | if (!isdigit(*str) || *str == '\0') |
| 38 | return -1; |
| 39 | |
| 40 | while (isblank(*str)) |
| 41 | str++; |
| 42 | if (*str == '\0') |
| 43 | return -1; |
| 44 | |
| 45 | min = num; |
| 46 | do { |
| 47 | |
| 48 | /* go ahead to the first digit */ |
| 49 | while (isblank(*str)) |
| 50 | str++; |
| 51 | if (!isdigit(*str)) |
| 52 | return -1; |
| 53 | |
| 54 | /* get the digit value */ |
| 55 | errno = 0; |
| 56 | idx = strtoul(str, &end, 10); |
| 57 | if (errno || end == NULL || idx >= num) |
| 58 | return -1; |
| 59 | |
| 60 | /* go ahead to separator '-' and ',' */ |
| 61 | while (isblank(*end)) |
| 62 | end++; |
| 63 | if (*end == '-') { |
| 64 | if (min == num) |
| 65 | min = idx; |
| 66 | else /* avoid continuous '-' */ |
| 67 | return -1; |
| 68 | } else if ((*end == ',') || (*end == '\0')) { |
| 69 | max = idx; |
| 70 | |
| 71 | if (min == num) |
| 72 | min = idx; |
| 73 | |
| 74 | for (idx = RTE_MIN(min, max); |
| 75 | idx <= RTE_MAX(min, max); idx++) { |
| 76 | set[idx] = 1; |
| 77 | } |
| 78 | min = num; |
| 79 | } else |
| 80 | return -1; |
no test coverage detected