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74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
/*-
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* Copyright (C) Baptiste Daroussin <bapt@FreeBSD.org>
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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 DAVID L. NUGENT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL DAVID L. NUGENT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <errno.h>
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#include <inttypes.h>
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#include <limits.h>
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#include <stdlib.h>
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#include "pw.h"
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#define INVALID "invalid"
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#define TOOSMALL "too small"
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#define TOOLARGE "too large"
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uintmax_t
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strtounum(const char *numstr, uintmax_t minval, uintmax_t maxval,
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const char **errstrp)
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{
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uintmax_t ret = 0;
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char *ep;
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if (minval > maxval) {
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errno = EINVAL;
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if (errstrp != NULL)
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*errstrp = INVALID;
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return (0);
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}
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ret = strtoumax(numstr, &ep, 10);
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if (errno == EINVAL || numstr == ep || *ep != '\0') {
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errno = EINVAL;
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if (errstrp != NULL)
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*errstrp = INVALID;
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return (0);
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} else if ((ret == 0 && errno == ERANGE) || ret < minval) {
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errno = ERANGE;
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if (errstrp != NULL)
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*errstrp = TOOSMALL;
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return (0);
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} else if ((ret == UINTMAX_MAX && errno == ERANGE) || ret > maxval) {
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errno = ERANGE;
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if (errstrp != NULL)
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*errstrp = TOOLARGE;
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return (0);
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}
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return (ret);
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}
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