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67 lines
2 KiB
C
67 lines
2 KiB
C
/*-
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* Copyright (C) 2015 Baptiste Daroussin <bapt@FreeBSD.org>
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* All rights reserved.
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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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* in this position and unchanged.
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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 AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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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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uintmax_t
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strtounum(const char * __restrict np, uintmax_t minval, uintmax_t maxval,
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const char ** __restrict errpp)
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{
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char *endp;
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uintmax_t ret;
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*errpp = NULL;
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if (minval > maxval) {
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errno = EINVAL;
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*errpp = "invalid";
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return (0);
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}
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errno = 0;
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ret = strtoumax(np, &endp, 10);
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if (endp == np || *endp != '\0') {
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errno = EINVAL;
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*errpp = "invalid";
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return (0);
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}
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if (ret < minval) {
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errno = ERANGE;
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*errpp = "too small";
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return (0);
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}
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if (errno == ERANGE || ret > maxval) {
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errno = ERANGE;
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*errpp = "too large";
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return (0);
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}
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return (ret);
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}
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