171dafaa1Schristos /* $OpenBSD: strtonum.c,v 1.6 2004/08/03 19:38:01 millert Exp $ */
271dafaa1Schristos
371dafaa1Schristos /*
471dafaa1Schristos * Copyright (c) 2004 Ted Unangst and Todd Miller
571dafaa1Schristos * All rights reserved.
671dafaa1Schristos *
771dafaa1Schristos * Permission to use, copy, modify, and distribute this software for any
871dafaa1Schristos * purpose with or without fee is hereby granted, provided that the above
971dafaa1Schristos * copyright notice and this permission notice appear in all copies.
1071dafaa1Schristos *
1171dafaa1Schristos * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
1271dafaa1Schristos * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
1371dafaa1Schristos * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
1471dafaa1Schristos * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
1571dafaa1Schristos * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
1671dafaa1Schristos * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
1771dafaa1Schristos * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
1871dafaa1Schristos */
19*315c7490Schristos #if HAVE_NBTOOL_CONFIG_H
20*315c7490Schristos #include "nbtool_config.h"
21*315c7490Schristos #endif
22*315c7490Schristos #include <sys/cdefs.h>
23*315c7490Schristos __RCSID("$NetBSD: strtonum.c,v 1.2 2009/10/26 21:14:18 christos Exp $");
2471dafaa1Schristos #include <errno.h>
2571dafaa1Schristos #include <limits.h>
2671dafaa1Schristos #include <stdlib.h>
2771dafaa1Schristos
2871dafaa1Schristos #define INVALID 1
2971dafaa1Schristos #define TOOSMALL 2
3071dafaa1Schristos #define TOOLARGE 3
3171dafaa1Schristos
3271dafaa1Schristos long long
3371dafaa1Schristos strtonum(const char *numstr, long long minval, long long maxval,
34*315c7490Schristos const char **errstrp);
35*315c7490Schristos long long
strtonum(const char * numstr,long long minval,long long maxval,const char ** errstrp)36*315c7490Schristos strtonum(const char *numstr, long long minval, long long maxval,
3771dafaa1Schristos const char **errstrp)
3871dafaa1Schristos {
3971dafaa1Schristos long long ll = 0;
4071dafaa1Schristos char *ep;
4171dafaa1Schristos int error = 0;
4271dafaa1Schristos struct errval {
4371dafaa1Schristos const char *errstr;
4471dafaa1Schristos int err;
4571dafaa1Schristos } ev[4] = {
4671dafaa1Schristos { NULL, 0 },
4771dafaa1Schristos { "invalid", EINVAL },
4871dafaa1Schristos { "too small", ERANGE },
4971dafaa1Schristos { "too large", ERANGE },
5071dafaa1Schristos };
5171dafaa1Schristos
5271dafaa1Schristos ev[0].err = errno;
5371dafaa1Schristos errno = 0;
5471dafaa1Schristos if (minval > maxval)
5571dafaa1Schristos error = INVALID;
5671dafaa1Schristos else {
5771dafaa1Schristos ll = strtoll(numstr, &ep, 10);
5871dafaa1Schristos if (numstr == ep || *ep != '\0')
5971dafaa1Schristos error = INVALID;
6071dafaa1Schristos else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
6171dafaa1Schristos error = TOOSMALL;
6271dafaa1Schristos else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
6371dafaa1Schristos error = TOOLARGE;
6471dafaa1Schristos }
6571dafaa1Schristos if (errstrp != NULL)
6671dafaa1Schristos *errstrp = ev[error].errstr;
6771dafaa1Schristos errno = ev[error].err;
6871dafaa1Schristos if (error)
6971dafaa1Schristos ll = 0;
7071dafaa1Schristos
7171dafaa1Schristos return (ll);
7271dafaa1Schristos }
7371dafaa1Schristos
74