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 */ 73
