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/*
* SPDX-FileCopyrightText: 2008 , Nicolas François
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include <config.h>
#ident "$Id: $"
#include <ctype.h>
#include <stdlib.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
*
* If the range is valid, getrange returns 1.
* If the range is not valid, getrange returns 0.
*/
int getrange (const char *range,
unsigned long *min, bool *has_min,
unsigned long *max, bool *has_max)
{
char *endptr;
unsigned long n;
if (NULL == range) {
return 0;
}
if ('-' == range[0]) {
if (!isdigit(range[1])) {
/* invalid */
return 0;
}
errno = 0;
n = strtoul (&range[1], &endptr, 10);
if (('\0' != *endptr) || (ERANGE == errno)) {
/* invalid */
return 0;
}
/* -<long> */
*has_min = false;
*has_max = true;
*max = n;
} else {
errno = 0;
n = strtoul (range, &endptr, 10);
if (ERANGE == errno) {
/* invalid */
return 0;
}
switch (*endptr) {
case '\0':
/* <long> */
*has_min = true;
*has_max = true;
*min = n;
*max = n;
break;
case '-':
endptr++;
if ('\0' == *endptr) {
/* <long>- */
*has_min = true;
*has_max = false;
*min = n;
} else if (!isdigit (*endptr)) {
/* invalid */
return 0;
} else {
*has_min = true;
*min = n;
errno = 0;
n = strtoul (endptr, &endptr, 10);
if ( ('\0' != *endptr)
|| (ERANGE == errno)) {
/* invalid */
return 0;
}
/* <long>-<long> */
*has_max = true;
*max = n;
}
break;
default:
return 0;
}
}
return 1;
}
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