strtonum.c revision 162853
1272343Sngie/* $OpenBSD: strtonum.c,v 1.6 2004/08/03 19:38:01 millert Exp $ */ 2272343Sngie 3272343Sngie/* 4272343Sngie * Copyright (c) 2004 Ted Unangst and Todd Miller 5272343Sngie * All rights reserved. 6272343Sngie * 7272343Sngie * Permission to use, copy, modify, and distribute this software for any 8272343Sngie * purpose with or without fee is hereby granted, provided that the above 9272343Sngie * copyright notice and this permission notice appear in all copies. 10272343Sngie * 11272343Sngie * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 12272343Sngie * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 13272343Sngie * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 14272343Sngie * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 15272343Sngie * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 16272343Sngie * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 17272343Sngie * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 18272343Sngie */ 19272343Sngie 20272343Sngie/* OPENBSD ORIGINAL: lib/libc/stdlib/strtonum.c */ 21272343Sngie 22272343Sngie#include "includes.h" 23272343Sngie 24272343Sngie#ifndef HAVE_STRTONUM 25272343Sngie#include <stdlib.h> 26272343Sngie#include <limits.h> 27272343Sngie#include <errno.h> 28272343Sngie 29272343Sngie#define INVALID 1 30272343Sngie#define TOOSMALL 2 31272343Sngie#define TOOLARGE 3 32272343Sngie 33272343Sngielong long 34272343Sngiestrtonum(const char *numstr, long long minval, long long maxval, 35272343Sngie const char **errstrp) 36272343Sngie{ 37272343Sngie long long ll = 0; 38272343Sngie char *ep; 39272343Sngie int error = 0; 40272343Sngie struct errval { 41272343Sngie const char *errstr; 42272343Sngie int err; 43272343Sngie } ev[4] = { 44272343Sngie { NULL, 0 }, 45272343Sngie { "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