72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/* $NetBSD: strtonum.c,v 1.6 2018/12/06 06:29:56 kamil Exp $ */
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/*-
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* Copyright (c) 2014 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Christos Zoulas.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: strtonum.c,v 1.6 2018/12/06 06:29:56 kamil Exp $");
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#include "namespace.h"
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#define _OPENBSD_SOURCE
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include <inttypes.h>
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long long
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strtonum(const char *nptr, long long minval, long long maxval,
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const char **errstr)
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{
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int e;
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long long rv;
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const char *resp;
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if (errstr == NULL)
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errstr = &resp;
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if (minval > maxval) {
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*errstr = "invalid";
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return 0;
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}
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rv = (long long)strtoi(nptr, NULL, 10, minval, maxval, &e);
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if (e == 0) {
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*errstr = NULL;
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return rv;
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}
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if (e == ERANGE)
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*errstr = (rv == maxval ? "too large" : "too small");
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else
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*errstr = "invalid";
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return 0;
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}
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