82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
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/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2010-2014 Intel Corporation.
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* Copyright(c) 2014 6WIND S.A.
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*/
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#include <string.h>
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#include <rte_log.h>
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#include "parse.h"
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/*
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* Parse elem, the elem could be single number/range or group
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* 1) A single number elem, it's just a simple digit. e.g. 9
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* 2) A single range elem, two digits with a '-' between. e.g. 2-6
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* 3) A group elem, combines multiple 1) or 2) e.g 0,2-4,6
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* Within group, '-' used for a range separator;
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* ',' used for a single number.
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*/
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int
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parse_set(const char *input, uint16_t set[], unsigned int num)
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{
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unsigned int idx;
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const char *str = input;
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char *end = NULL;
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unsigned int min, max;
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memset(set, 0, num * sizeof(uint16_t));
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while (isblank(*str))
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str++;
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/* only digit or left bracket is qualify for start point */
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if (!isdigit(*str) || *str == '\0')
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return -1;
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while (isblank(*str))
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str++;
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if (*str == '\0')
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return -1;
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min = num;
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do {
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/* go ahead to the first digit */
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while (isblank(*str))
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str++;
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if (!isdigit(*str))
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return -1;
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/* get the digit value */
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errno = 0;
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idx = strtoul(str, &end, 10);
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if (errno || end == NULL || idx >= num)
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return -1;
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/* go ahead to separator '-' and ',' */
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while (isblank(*end))
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end++;
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if (*end == '-') {
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if (min == num)
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min = idx;
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else /* avoid continuous '-' */
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return -1;
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} else if ((*end == ',') || (*end == '\0')) {
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max = idx;
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if (min == num)
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min = idx;
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for (idx = RTE_MIN(min, max);
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idx <= RTE_MAX(min, max); idx++) {
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set[idx] = 1;
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}
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min = num;
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} else
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return -1;
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str = end + 1;
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} while (*end != '\0');
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return str - input;
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}
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