DPDK  19.11.14-rc1
examples/vm_power_manager/guest_cli/parse.c
/* SPDX-License-Identifier: BSD-3-Clause
* Copyright(c) 2010-2014 Intel Corporation.
* Copyright(c) 2014 6WIND S.A.
*/
#include <stdlib.h>
#include <string.h>
#include <rte_log.h>
#include "parse.h"
/*
* 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.
*/
int
parse_set(const char *input, uint16_t set[], unsigned int num)
{
unsigned int idx;
const char *str = input;
char *end = NULL;
unsigned int min, max;
memset(set, 0, num * sizeof(uint16_t));
while (isblank(*str))
str++;
/* only digit or left bracket is qualify for start point */
if (!isdigit(*str) || *str == '\0')
return -1;
while (isblank(*str))
str++;
if (*str == '\0')
return -1;
min = num;
do {
/* go ahead to the first digit */
while (isblank(*str))
str++;
if (!isdigit(*str))
return -1;
/* get the digit value */
errno = 0;
idx = strtoul(str, &end, 10);
if (errno || end == NULL || idx >= num)
return -1;
/* go ahead to separator '-' and ',' */
while (isblank(*end))
end++;
if (*end == '-') {
if (min == num)
min = idx;
else /* avoid continuous '-' */
return -1;
} else if ((*end == ',') || (*end == '\0')) {
max = idx;
if (min == num)
min = idx;
for (idx = RTE_MIN(min, max);
idx <= RTE_MAX(min, max); idx++) {
set[idx] = 1;
}
min = num;
} else
return -1;
str = end + 1;
} while (*end != '\0');
return str - input;
}