1*59287933SDavid Hunt /* SPDX-License-Identifier: BSD-3-Clause
2*59287933SDavid Hunt * Copyright(c) 2010-2014 Intel Corporation.
3*59287933SDavid Hunt * Copyright(c) 2014 6WIND S.A.
4*59287933SDavid Hunt */
5*59287933SDavid Hunt
6*59287933SDavid Hunt #include <stdlib.h>
7*59287933SDavid Hunt #include <string.h>
8*59287933SDavid Hunt #include <rte_log.h>
9*59287933SDavid Hunt #include "parse.h"
10*59287933SDavid Hunt
11*59287933SDavid Hunt /*
12*59287933SDavid Hunt * Parse elem, the elem could be single number/range or group
13*59287933SDavid Hunt * 1) A single number elem, it's just a simple digit. e.g. 9
14*59287933SDavid Hunt * 2) A single range elem, two digits with a '-' between. e.g. 2-6
15*59287933SDavid Hunt * 3) A group elem, combines multiple 1) or 2) e.g 0,2-4,6
16*59287933SDavid Hunt * Within group, '-' used for a range separator;
17*59287933SDavid Hunt * ',' used for a single number.
18*59287933SDavid Hunt */
19*59287933SDavid Hunt int
parse_set(const char * input,uint16_t set[],unsigned int num)20*59287933SDavid Hunt parse_set(const char *input, uint16_t set[], unsigned int num)
21*59287933SDavid Hunt {
22*59287933SDavid Hunt unsigned int idx;
23*59287933SDavid Hunt const char *str = input;
24*59287933SDavid Hunt char *end = NULL;
25*59287933SDavid Hunt unsigned int min, max;
26*59287933SDavid Hunt
27*59287933SDavid Hunt memset(set, 0, num * sizeof(uint16_t));
28*59287933SDavid Hunt
29*59287933SDavid Hunt while (isblank(*str))
30*59287933SDavid Hunt str++;
31*59287933SDavid Hunt
32*59287933SDavid Hunt /* only digit or left bracket is qualify for start point */
33*59287933SDavid Hunt if (!isdigit(*str) || *str == '\0')
34*59287933SDavid Hunt return -1;
35*59287933SDavid Hunt
36*59287933SDavid Hunt while (isblank(*str))
37*59287933SDavid Hunt str++;
38*59287933SDavid Hunt if (*str == '\0')
39*59287933SDavid Hunt return -1;
40*59287933SDavid Hunt
41*59287933SDavid Hunt min = num;
42*59287933SDavid Hunt do {
43*59287933SDavid Hunt
44*59287933SDavid Hunt /* go ahead to the first digit */
45*59287933SDavid Hunt while (isblank(*str))
46*59287933SDavid Hunt str++;
47*59287933SDavid Hunt if (!isdigit(*str))
48*59287933SDavid Hunt return -1;
49*59287933SDavid Hunt
50*59287933SDavid Hunt /* get the digit value */
51*59287933SDavid Hunt errno = 0;
52*59287933SDavid Hunt idx = strtoul(str, &end, 10);
53*59287933SDavid Hunt if (errno || end == NULL || idx >= num)
54*59287933SDavid Hunt return -1;
55*59287933SDavid Hunt
56*59287933SDavid Hunt /* go ahead to separator '-' and ',' */
57*59287933SDavid Hunt while (isblank(*end))
58*59287933SDavid Hunt end++;
59*59287933SDavid Hunt if (*end == '-') {
60*59287933SDavid Hunt if (min == num)
61*59287933SDavid Hunt min = idx;
62*59287933SDavid Hunt else /* avoid continuous '-' */
63*59287933SDavid Hunt return -1;
64*59287933SDavid Hunt } else if ((*end == ',') || (*end == '\0')) {
65*59287933SDavid Hunt max = idx;
66*59287933SDavid Hunt
67*59287933SDavid Hunt if (min == num)
68*59287933SDavid Hunt min = idx;
69*59287933SDavid Hunt
70*59287933SDavid Hunt for (idx = RTE_MIN(min, max);
71*59287933SDavid Hunt idx <= RTE_MAX(min, max); idx++) {
72*59287933SDavid Hunt set[idx] = 1;
73*59287933SDavid Hunt }
74*59287933SDavid Hunt min = num;
75*59287933SDavid Hunt } else
76*59287933SDavid Hunt return -1;
77*59287933SDavid Hunt
78*59287933SDavid Hunt str = end + 1;
79*59287933SDavid Hunt } while (*end != '\0');
80*59287933SDavid Hunt
81*59287933SDavid Hunt return str - input;
82*59287933SDavid Hunt }
83