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contrib/mg/strtonum.c
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| /* $OpenBSD: strtonum.c,v 1.7 2013/04/17 18:40:58 tedu Exp $ */ | |||||
| /* | |||||
| * Copyright (c) 2004 Ted Unangst and Todd Miller | |||||
| * All rights reserved. | |||||
| * | |||||
| * Permission to use, copy, modify, and distribute this software for any | |||||
| * purpose with or without fee is hereby granted, provided that the above | |||||
| * copyright notice and this permission notice appear in all copies. | |||||
| * | |||||
| * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |||||
| * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |||||
| * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |||||
| * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |||||
| * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |||||
| * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |||||
| * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |||||
| */ | |||||
| #include <errno.h> | |||||
| #include <limits.h> | |||||
| #include <stdlib.h> | |||||
| #include "config.h" | |||||
| #ifndef HAVE_STRTONUM | |||||
| #define INVALID 1 | |||||
| #define TOOSMALL 2 | |||||
| #define TOOLARGE 3 | |||||
| long long | |||||
| strtonum(const char *numstr, long long minval, long long maxval, | |||||
| const char **errstrp) | |||||
| { | |||||
| long long ll = 0; | |||||
| int error = 0; | |||||
| char *ep; | |||||
| struct errval { | |||||
| const char *errstr; | |||||
| int err; | |||||
| } ev[4] = { | |||||
| { NULL, 0 }, | |||||
| { "invalid", EINVAL }, | |||||
| { "too small", ERANGE }, | |||||
| { "too large", ERANGE }, | |||||
| }; | |||||
| ev[0].err = errno; | |||||
| errno = 0; | |||||
| if (minval > maxval) { | |||||
| error = INVALID; | |||||
| } else { | |||||
| ll = strtoll(numstr, &ep, 10); | |||||
| if (numstr == ep || *ep != '\0') | |||||
| error = INVALID; | |||||
| else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval) | |||||
| error = TOOSMALL; | |||||
| else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval) | |||||
| error = TOOLARGE; | |||||
| } | |||||
| if (errstrp != NULL) | |||||
| *errstrp = ev[error].errstr; | |||||
| errno = ev[error].err; | |||||
| if (error) | |||||
| ll = 0; | |||||
| return (ll); | |||||
| } | |||||
| #endif /* !HAVE_STRTONUM */ | |||||