| Mike Lockwood | 1305e95 | 2011-12-07 08:17:59 -0800 | [diff] [blame] | 1 | /* $OpenBSD: strtonum.c,v 1.6 2004/08/03 19:38:01 millert Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 2004 Ted Unangst and Todd Miller |
| 5 | * All rights reserved. |
| 6 | * |
| 7 | * Permission to use, copy, modify, and distribute this software for any |
| 8 | * purpose with or without fee is hereby granted, provided that the above |
| 9 | * copyright notice and this permission notice appear in all copies. |
| 10 | * |
| 11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES |
| 12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF |
| 13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR |
| 14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES |
| 15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN |
| 16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF |
| 17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. |
| 18 | */ |
| 19 | |
| 20 | /* OPENBSD ORIGINAL: lib/libc/stdlib/strtonum.c */ |
| 21 | |
| 22 | #include "includes.h" |
| 23 | |
| 24 | #ifndef HAVE_STRTONUM |
| 25 | #include <stdlib.h> |
| 26 | #include <limits.h> |
| 27 | #include <errno.h> |
| 28 | |
| 29 | #define INVALID 1 |
| 30 | #define TOOSMALL 2 |
| 31 | #define TOOLARGE 3 |
| 32 | |
| 33 | long long |
| 34 | strtonum(const char *numstr, long long minval, long long maxval, |
| 35 | const char **errstrp) |
| 36 | { |
| 37 | long long ll = 0; |
| 38 | char *ep; |
| 39 | int error = 0; |
| 40 | struct errval { |
| 41 | const char *errstr; |
| 42 | int err; |
| 43 | } ev[4] = { |
| 44 | { NULL, 0 }, |
| 45 | { "invalid", EINVAL }, |
| 46 | { "too small", ERANGE }, |
| 47 | { "too large", ERANGE }, |
| 48 | }; |
| 49 | |
| 50 | ev[0].err = errno; |
| 51 | errno = 0; |
| 52 | if (minval > maxval) |
| 53 | error = INVALID; |
| 54 | else { |
| 55 | ll = strtoll(numstr, &ep, 10); |
| 56 | if (numstr == ep || *ep != '\0') |
| 57 | error = INVALID; |
| 58 | else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval) |
| 59 | error = TOOSMALL; |
| 60 | else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval) |
| 61 | error = TOOLARGE; |
| 62 | } |
| 63 | if (errstrp != NULL) |
| 64 | *errstrp = ev[error].errstr; |
| 65 | errno = ev[error].err; |
| 66 | if (error) |
| 67 | ll = 0; |
| 68 | |
| 69 | return (ll); |
| 70 | } |
| 71 | |
| 72 | #endif /* HAVE_STRTONUM */ |