6bf5d6d4f3
Set *has_{min,max} = false at the begining, so we only need to set them
to true later.
This means we set these variables on error, which we didn't do before,
but since we return -1 on error and ignore (don't use) the pointees at
call site, that's fine.
Signed-off-by: Alejandro Colomar <alx@kernel.org>
96 lines
1.7 KiB
C
96 lines
1.7 KiB
C
/*
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* SPDX-FileCopyrightText: 2008 , Nicolas François
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <config.h>
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#ident "$Id: $"
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#include <ctype.h>
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#include <stdlib.h>
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#include "atoi/strtou_noneg.h"
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#include "defines.h"
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#include "prototypes.h"
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/*
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* Parse a range and indicate if the range is valid.
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* Valid ranges are in the form:
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* <long> -> min=max=long has_min has_max
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* -<long> -> max=long !has_min has_max
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* <long>- -> min=long has_min !has_max
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* <long1>-<long2> -> min=long1 max=long2 has_min has_max
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*/
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int
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getrange(const char *range,
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unsigned long *min, bool *has_min,
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unsigned long *max, bool *has_max)
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{
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char *endptr;
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unsigned long n;
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if (NULL == range)
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return -1;
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*has_min = false;
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*has_max = false;
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if ('-' == range[0]) {
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if (!isdigit(range[1]))
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return -1;
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errno = 0;
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n = strtoul_noneg(&range[1], &endptr, 10);
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if (('\0' != *endptr) || (0 != errno))
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return -1;
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/* -<long> */
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*has_max = true;
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*max = n;
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} else {
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errno = 0;
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n = strtoul_noneg(range, &endptr, 10);
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if (endptr == range || 0 != errno)
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return -1;
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switch (*endptr) {
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case '\0':
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/* <long> */
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*has_min = true;
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*has_max = true;
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*min = n;
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*max = n;
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break;
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case '-':
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endptr++;
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if ('\0' == *endptr) {
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/* <long>- */
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*has_min = true;
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*min = n;
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} else if (!isdigit (*endptr)) {
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return -1;
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} else {
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*has_min = true;
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*min = n;
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errno = 0;
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n = strtoul_noneg(endptr, &endptr, 10);
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if ('\0' != *endptr || 0 != errno)
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return -1;
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/* <long>-<long> */
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*has_max = true;
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*max = n;
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}
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break;
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default:
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return -1;
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}
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}
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return 0;
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}
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