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// SPDX-FileCopyrightText: 2008, Nicolas François
// SPDX-FileCopyrightText: 2023-2024, Alejandro Colomar <alx@kernel.org>
// SPDX-License-Identifier: BSD-3-Clause
#include <config.h>
#ident "$Id: $"
#include <ctype.h>
#include <stdlib.h>
#include "atoi/a2i.h"
#include "defines.h"
#include "prototypes.h"
/*
* Parse a range and indicate if the range is valid.
* Valid ranges are in the form:
* <long> -> min=max=long has_min has_max
* -<long> -> max=long !has_min has_max
* <long>- -> min=long has_min !has_max
* <long1>-<long2> -> min=long1 max=long2 has_min has_max
*/
int
getrange(const char *range,
unsigned long *min, bool *has_min,
unsigned long *max, bool *has_max)
{
const char *end;
if (NULL == range)
return -1;
*min = 0;
*has_min = false;
*has_max = false;
if ('-' == range[0]) {
end = range + 1;
goto parse_max;
}
if (a2ul(min, range, &end, 10, 0, ULONG_MAX) == -1 && errno != ENOTSUP)
return -1;
*has_min = true;
switch (*end++) {
case '\0':
*has_max = true;
*max = *min;
return 0; /* <long> */
case '-':
if ('\0' == *end)
return 0; /* <long>- */
parse_max:
if (!isdigit((unsigned char) *end))
return -1;
if (a2ul(max, end, NULL, 10, *min, ULONG_MAX) == -1)
return -1;
*has_max = true;
return 0; /* <long>-<long>, or -<long> */
default:
return -1;
}
}
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