text: /*	$NetBSD: strtonum.c,v 1.4 2015/03/10 12:57:56 christos Exp $	*/
  /*-
   * Copyright (c) 2014 The NetBSD Foundation, Inc.
   * All rights reserved.
   *
   * This code is derived from software contributed to The NetBSD Foundation
   * by Christos Zoulas.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
   */
  
  #include <sys/cdefs.h>
  __RCSID("$NetBSD: strtonum.c,v 1.4 2015/03/10 12:57:56 christos Exp $");
  
  #define _OPENBSD_SOURCE
  #include <stdio.h>
  #include <stdlib.h>
  #include <errno.h>
  #include <inttypes.h>
  
  long long
  strtonum(const char *nptr, long long minval, long long maxval,
           const char **errstr)
  {
  	int e;
  	long long rv;
  	const char *resp;
  
  	if (errstr == NULL)
  		errstr = &resp;
  
  	rv = (long long)strtoi(nptr, NULL, 10, minval, maxval, &e);
  
  	if (e == 0) {
  		*errstr = NULL;
  		return rv;
  	}
  
  	if (e == ERANGE)
  		*errstr = (rv == maxval ? "too large" : "too small");
  	else
  		*errstr = "invalid";
  
  	return 0;
  }
  