/* * 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; }