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